U.S. patent application number 16/816048 was filed with the patent office on 2021-02-04 for load cell component for improving structural strength of pile body after self-balanced testing of pile foundation.
This patent application is currently assigned to Yuxin Mao. The applicant listed for this patent is Yuxin Mao. Invention is credited to Lei Fu, Guoping Lian, Liang Ma, Yuxin Mao, Ziping Zhang.
Application Number | 20210032828 16/816048 |
Document ID | / |
Family ID | 1000004748106 |
Filed Date | 2021-02-04 |
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United States Patent
Application |
20210032828 |
Kind Code |
A1 |
Mao; Yuxin ; et al. |
February 4, 2021 |
Load Cell Component for Improving Structural Strength of Pile Body
after Self-Balanced Testing of Pile Foundation
Abstract
The invention discloses a load cell component for improving the
structural strength of a pile body after self-balanced testing of a
pile foundation, which comprises a loading unit component, upper
displacement rod components fixed on the upper part of the loading
unit component, and lower displacement rod components fixed on the
lower part of the loading unit component, and further comprises
telescopic rod components and a grouting component; there is a
plurality of telescopic rod components, the telescopic rod
components are fixed to the loading unit component, and the
telescopic direction of the telescopic rod components is parallel
to the loading direction of the loading unit component; each
telescopic rod component comprises an inner rod and an outer
sleeve, wherein a part of the inner rod is positioned in the outer
sleeve, a slurry cavity is formed between the outer wall of the
inner rod positioned in the outer sleeve and the inner wall of the
outer sleeve, and the outer sleeve is provided with a slurry inlet;
and the grouting component communicates with the slurry inlets, and
when in use, slurry is introduced into the slurry cavities through
the grouting component.
Inventors: |
Mao; Yuxin; (Hangzhou city,
CN) ; Lian; Guoping; (Hangzhou city, CN) ;
Zhang; Ziping; (Hangzhou city, CN) ; Fu; Lei;
(Hangzhou city, CN) ; Ma; Liang; (Hangzhou city,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Mao; Yuxin |
Hangzhou |
|
CN |
|
|
Assignee: |
Mao; Yuxin
Hangzhou
CN
|
Family ID: |
1000004748106 |
Appl. No.: |
16/816048 |
Filed: |
March 11, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E02D 2300/0023 20130101;
E02D 2250/00 20130101; E02D 2250/0007 20130101; E02D 5/34 20130101;
E02D 5/64 20130101; E02D 2300/0034 20130101; E02D 2250/003
20130101; E02D 33/00 20130101; E02D 2300/002 20130101 |
International
Class: |
E02D 5/64 20060101
E02D005/64; E02D 33/00 20060101 E02D033/00; E02D 5/34 20060101
E02D005/34 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 4, 2019 |
CN |
2019107144389 |
Claims
1. A load cell component for improving the structural strength of a
pile body after self-balanced testing of a pile foundation,
comprising a loading unit component, upper displacement rod
components fixed on the upper part of the loading unit component,
and lower displacement rod components fixed on the lower part of
the loading unit component, characterized in that the load cell
component further comprises telescopic rod components and a
grouting component; there is a plurality of telescopic rod
components, the telescopic rod components are fixed to the loading
unit component, and the telescopic direction of the telescopic rod
components is parallel to the loading direction of the loading unit
component; each telescopic rod component comprises an inner rod and
an outer sleeve, wherein a part of the inner rod is positioned in
the outer sleeve, a slurry cavity is formed between the outer wall
of the inner rod positioned in the outer sleeve and the inner wall
of the outer sleeve, and the outer sleeve is provided with a slurry
inlet; and the grouting component communicates with the slurry
inlets, and when in use, slurry is introduced into the slurry
cavities through the grouting component.
2. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 1, characterized in that the grouting component
comprises an annular grouting channel and grouting pipes, the
telescopic rod components are all connected with the annular
grouting channel, the slurry inlet of each outer sleeve is located
in the annular grouting channel, one end of each grouting pipe
communicates with the annular grouting channel, and the other end
is a slurry inlet.
3. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 2, characterized in that the loading unit
component comprises loading units, an upper inner ring, a lower
inner ring, and an upper outer ring; there is a plurality of
loading units, and the plurality of loading units are uniformly
arranged in a circumferential manner; and the upper inner ring and
the lower inner ring are positioned between the plurality of
loading units and are arranged with one above the other, the upper
inner ring is connected with the upper part of each loading unit
through an upper connecting plate, the lower inner ring is
connected with the lower part of each loading unit through a lower
connecting plate, and the upper outer ring is at the periphery of
the plurality of loading units and is fixed to the upper parts of
the plurality of loading units at the same time.
4. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 3, characterized in that the annular grouting
channel comprises a lower outer ring fixed on the lower part of
each loading unit and a slurry replenishing channel which is
annular and has an inner opening, the inner side of the slurry
replenishing channel is welded to the outer side wall of the lower
outer ring, a channel allowing the flow of slurry is enclosed by
the slurry replenishing channel and the lower outer ring, the lower
outer ring is at the periphery of the plurality of loading units
and is fixed to the lower parts of the plurality of loading units
at the same time, the inner rods are fixed on the upper outer ring,
and the outer sleeves are fixed on the lower outer ring.
5. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 3, characterized by further comprising a lower
outer ring, wherein the lower outer ring is at the periphery of the
plurality of loading units and fixed to the lower parts of the
plurality of loading units at the same time; the inner rods are
fixed to the lower outer ring, and the outer sleeves are fixed to
the upper outer ring; the grouting component comprises a grouting
channel and grouting pipes communicating with the grouting channel;
the slurry inlet on each outer sleeve is arranged at the upper end
of the outer sleeve; and the grouting channel is a hollow pipe, and
through holes corresponding to the slurry inlets are formed on the
grouting channel.
6. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 1, characterized in that both the inner wall of
each outer sleeve and the outer wall of each inner rod located
inside the corresponding outer sleeve are provided with groove
structures.
7. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 1, characterized in that only a through hole
matched with the diameter of the inner rod is left at the upper end
of each outer sleeve, and the bottom of each inner rod is provided
with a limiting table for preventing the inner rod from separating
from the corresponding outer sleeve.
8. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 1, characterized in that the inner rods are
fixed to the upper part of the loading unit component, and the
outer sleeves are fixed to the lower part of the loading unit
component; the grouting component comprises a grouting channel and
grouting pipes communicating with the grouting channel; the slurry
inlet on each outer sleeve is arranged on the side wall of the
outer sleeve; and the grouting channel is a hollow pipe, the
grouting channel is welded to the outer sleeves, and through holes
corresponding to the slurry inlets are formed on the grouting
channel.
9. The load cell component for improving the structural strength of
the pile body after self-balanced testing of the pile foundation
according to claim 8, characterized in that there are two slurry
inlets, the two slurry inlets are arranged with one above the
other, there are two grouting channels, and the two grouting
channels are arranged with one above the other and correspond to
the slurry inlets respectively.
10. The load cell component for improving the structural strength
of the pile body after self-balanced testing of the pile foundation
according to claim 9, characterized in that the load cell component
and reinforcement cages of an engineering pile are fixed in advance
before pour-molding of the pile foundation, the number of the
telescopic rod components is the same as the number of main bars of
the reinforcement cages or meets the requirement of equal section
replacement, the inner rods are welded to the main bars of an upper
reinforcement cage of the engineering pile and wound tightly with
steel wires, and the outer sleeves are welded to the main bars of a
lower reinforcement cage and wound tightly with steel wires.
Description
BACKGROUND OF THE INVENTION
1. Technical Field
[0001] The invention relates to a load cell component for improving
the structural strength of a pile body after self-balanced testing
of a pile foundation, and belongs to the field of construction
tools.
2. Description of Related Art
[0002] At present, with the popularization of the self-balanced
pile foundation static load testing technology, convenience and
economical efficiency are increasingly prominent. Meanwhile, new
application requirements have emerged, which need the support of
relevant technologies. In the related art, an engineering pile body
is broken after balanced static load testing. To recover the
strength of the pile body after testing, the method is to increase
grouting outside a load cell and grouting in a loading cavity of
the load cell, so that the compressive strength is high after
solidification of slurry, which improves the pressure resistance.
However, due to the low tensile strength of the slurry after
solidification and the relative sliding of a piston and a cylinder
in the load cell, sufficient tensile resistance and horizontal
force resistance cannot be generated for the tested engineering
pile, resulting in low overall structural strength of the tested
engineering pile.
BRIEF SUMMARY OF THE INVENTION
[0003] In view of the defects of the prior art, the invention
provides a load cell component for improving the structural
strength of a pile body after self-balanced testing of a pile
foundation.
[0004] In order to achieve the above purpose, the invention
provides the following technical scheme: a load cell component for
improving the structural strength of a pile body after
self-balanced testing of a pile foundation comprises a loading unit
component, upper displacement rod components fixed on the upper
part of the loading unit component, and lower displacement rod
components fixed on the lower part of the loading unit component,
and further comprises telescopic rod components and a grouting
component; there is a plurality of telescopic rod components, the
telescopic rod components are fixed to the loading unit component,
and the telescopic direction of the telescopic rod components is
parallel to the loading direction of the loading unit component;
each telescopic rod component comprises an inner rod and an outer
sleeve, wherein a part of the inner rod is positioned in the outer
sleeve, a slurry cavity is formed between the outer wall of the
inner rod positioned in the outer sleeve and the inner wall of the
outer sleeve, and the outer sleeve is provided with a slurry inlet;
and the grouting component communicates with the slurry inlets, and
when in use, slurry is introduced into the slurry cavities through
the grouting component.
[0005] In use, the inner rods are welded to an upper reinforcement
cage of an engineering pile and wound tightly with steel wires, and
the outer sleeves are welded to a lower reinforcement cage and
wound tightly with steel wires; or the inner rods are welded to the
lower reinforcement cage of the engineering pile and wound with
steel wires, and the outer sleeves are welded to the upper
reinforcement cage and wound with steel wires; during self-balanced
testing, grouting is carried out on each loading unit through a
preset loading pipe, so that the upper part and the lower part of
each loading unit move relatively to drive the upper and lower
reinforcement cages to move up and down, a fracture surface is
generated on the engineering pile, and meanwhile, the inner rods
move relatively in the outer sleeves; after self-balanced testing
is completed, grouting is carried out on the outer sleeves through
the grouting pipes and the annular grouting channel, and after the
slurry in the slurry cavity in each telescopic rod component is
solidified, the inner rods and the outer sleeves are fixed, and the
upper and lower reinforcement cage structures of the engineering
pile are continuously connected, which significantly improves the
uplift resistance and horizontal force resistance between the upper
reinforcement cage and the lower reinforcement cage, significantly
improves the overall structural strength of the foundation pile,
and restores or even exceeds the structural strength of the
original engineering pile.
[0006] Further, the grouting component comprises an annular
grouting channel and grouting pipes, the telescopic rod components
are all connected with the annular grouting channel, the slurry
inlet of each outer sleeve is located in the annular grouting
channel, one end of each grouting pipe communicates with the
annular grouting channel, and the other end is a slurry inlet.
[0007] Further, the loading unit component comprises loading units,
an upper inner ring, a lower inner ring, and an upper outer ring;
there is a plurality of loading units, and the plurality of loading
units are uniformly arranged in a circumferential manner; and the
upper inner ring and the lower inner ring are positioned between
the plurality of loading units and are arranged with one above the
other, the upper inner ring is connected with the upper part of
each loading unit through an upper connecting plate, the lower
inner ring is connected with the lower part of each loading unit
through a lower connecting plate, and the upper outer ring is at
the periphery of the plurality of loading units and is fixed to the
upper parts of the plurality of loading units at the same time.
[0008] Further, the annular grouting channel comprises a lower
outer ring fixed on the lower part of each loading unit and a
slurry replenishing channel which is annular and has an inner
opening, the inner side of the slurry replenishing channel is
welded to the outer side wall of the lower outer ring, a channel
allowing the flow of slurry is enclosed by the slurry replenishing
channel and the lower outer ring, the lower outer ring is at the
periphery of the plurality of loading units and is fixed to the
lower parts of the plurality of loading units at the same time, the
inner rods are fixed on the upper outer ring, and the outer sleeves
are fixed on the lower outer ring, which makes the stress on the
inner rods and the outer sleeves more uniform.
[0009] Further, the load cell component also comprises a lower
outer ring, and the lower outer ring is at the periphery of the
plurality of loading units and fixed to the lower parts of the
plurality of loading units at the same time; the inner rods are
fixed to the lower outer ring, and the outer sleeves are fixed to
the upper outer ring; the grouting component comprises a grouting
channel and grouting pipes communicating with the grouting channel;
the slurry inlet on each outer sleeve is arranged at the upper end
of the outer sleeve; and the grouting channel is a hollow pipe, and
through holes corresponding to the slurry inlets are formed on the
grouting channel.
[0010] Further, both the inner wall of each outer sleeve and the
outer wall of each inner rod located inside the corresponding outer
sleeve are provided with groove structures, and the arrangement of
the groove structures can increase the structural strength between
the inner rods and the outer sleeves after grouting.
[0011] Further, only a through hole matched with the diameter of
the inner rod is left at the upper end of each outer sleeve, the
bottom of each inner rod is provided with a limiting table for
preventing the inner rod from separating from the corresponding
outer sleeve, and the arrangement of the limiting table can
increase the structural strength between the inner rods and the
outer sleeves after grouting.
[0012] Further, the inner rods are fixed to the upper part of the
loading unit component, and the outer sleeves are fixed to the
lower part of the loading unit component; the grouting component
comprises a grouting channel and grouting pipes communicating with
the grouting channel; the slurry inlet on each outer sleeve is
arranged on the side wall of the outer sleeve; and the grouting
channel is a hollow pipe, the grouting channel is welded to the
outer sleeves, and through holes corresponding to the slurry inlets
are formed on the grouting channel.
[0013] Further, there are two slurry inlets, the two slurry inlets
are arranged with one above the other, there are two grouting
channels, and the two grouting channels are arranged with one above
the other and correspond to the slurry inlets respectively, which
further ensures that the outer sleeves are filled with slurry.
[0014] Further, the load cell component and reinforcement cages of
the engineering pile are fixed in advance before pour-molding of
the pile foundation, the number of the telescopic rod components is
the same as the number of main bars of the reinforcement cages or
meets the requirement of equal section replacement, the inner rods
are welded to the main bars of an upper reinforcement cage of the
engineering pile and wound tightly with steel wires, and the outer
sleeves are welded to the main bars of a lower reinforcement cage
and wound tightly with steel wires.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0015] FIG. 1 is a schematic diagram of one embodiment of a load
cell component provided by the invention;
[0016] FIG. 2 is a schematic diagram showing the connection between
a sheath and a slurry replenishing channel in a lower displacement
rod component provided by the invention;
[0017] FIG. 3 is a schematic diagram of one embodiment of a
telescopic rod component provided by the invention;
[0018] FIG. 4 is a sectional view of a load cell structure provided
by the invention;
[0019] FIG. 5 is an enlarged view of A in FIG. 4;
[0020] FIG. 6 is a schematic diagram of another embodiment of the
telescopic rod component provided by the invention;
[0021] FIG. 7 is a sectional view of the telescopic rod component
in the embodiment of FIG. 6.
[0022] FIG. 8 is a schematic diagram of another embodiment of the
load cell component provided by the invention.
[0023] In the drawings: 1. loading unit component; 12. upper outer
ring; 13. upper inner ring; 14. lower inner ring; 15. upper
connecting plate; 16. lower connecting plate; 2. upper displacement
rod component; 3. lower displacement rod component; 31. sheath;
311. grouting port; 4. telescopic rod component; 41. inner rod;
411. groove structure; 412. limiting table; 42. outer sleeve; 421.
groove structure; 422. slurry inlet; 43. slurry cavity; 5. grouting
channel; 51. lower outer ring; 52. slurry replenishing channel.
DETAILED DESCRIPTION OF THE INVENTION
[0024] An embodiment of a load cell component for improving the
structural strength of a pile body after self-balanced testing of a
pile foundation according to the invention will be further
described below with reference to FIGS. 1-7.
[0025] Referring to FIGS. 1 and 4, a load cell component for
improving the structural strength of a pile body after
self-balanced testing of a pile foundation comprises a loading unit
component 1, upper displacement rod components 2 welded on the
upper part of the loading unit component 1, lower displacement rod
components 3 welded on the lower part of the loading unit component
1, telescopic rod components 4 and a grouting component, wherein
the upper part of the loading unit component 1 refers to the part
which moves upward after the loading unit component 1 is loaded,
and the lower part of the loading unit component 1 refers to the
part which moves downward after the loading unit component 1 is
loaded; and in use, the upper displacement rod components 2 and the
lower displacement rod components 3 are used for measuring the
displacement of the upper part and the lower part of the loading
unit component 1 respectively.
[0026] The loading unit component 1 comprises loading units 11, an
upper inner ring 13, a lower inner ring 14, and an upper outer ring
12.
[0027] A plurality of loading units 11 can be arranged according to
actual conditions and are uniformly arranged in a circumferential
manner. In the present embodiment, it is preferred that there are
five loading units 11 which are uniformly arranged in a
circumferential manner. The loading unit 11 belongs to the prior
art, so the specific structure thereof will not be described in
detail in the present embodiment.
[0028] The upper inner ring 13 and the lower inner ring 14 are
positioned between the plurality of loading units 11 and are
arranged with one above the other, the upper inner ring 13 is
connected with the upper part of each loading unit 11 through an
upper connecting plate 15, and the upper part of each loading unit,
the upper connecting plate and the upper inner ring 13 are welded
together; the lower inner ring 14 is connected with the lower part
of each loading unit 11 through a lower connecting plate 16, and
the lower part of each loading unit 11, the lower connecting plate
and the lower inner ring 14 are welded together; and the upper part
and the lower part of each loading unit 11 are differentiated by an
opening surface, the upper part moves upward and the lower part
moves downward.
[0029] The upper outer ring 12 is positioned at the periphery of
the plurality of loading units and is welded to the upper parts of
the plurality of loading units 11 at the same time.
[0030] Referring to FIGS. 1, 2, 4 and 5, the grouting component
comprises an annular grouting channel 5 and grouting pipes; the
annular grouting channel 5 is positioned at the periphery of the
plurality of loading units 11 and is welded to the lower parts of
the plurality of loading units 11 at the same time; the slurry
refers to cement slurry or concrete slurry forming the pile
foundation, and in use, the slurry is injected into the grouting
channel 5 from the grouting pipes; and the annular grouting channel
5 comprises a lower outer ring 51 and a slurry replenishing channel
52 which is annular and has an inner opening, the lower outer ring
51 is welded to the inner opening of the slurry replenishing
channel 52, the inner wall of the lower outer ring 51 is welded to
the loading unit component 1, and a channel allowing the flow of
slurry is enclosed by the lower outer ring 51 and the slurry
replenishing channel 52.
[0031] In another embodiment, the lower outer ring 51 is at the
periphery of the plurality of loading units 11 and is fixed to the
lower parts of the plurality of loading units 11 at the same time,
the grouting component comprises an annular grouting channel 5 and
grouting pipes, the annular grouting channel is a hollow pipe, and
the annular grouting channel 5 is not connected to the loading unit
component 1.
[0032] Referring to FIGS. 1, 2, 3, 6 and 7, there is a plurality of
telescopic rod components 4, each telescopic rod component 4
comprises an inner rod 41 and an outer sleeve 42, a part of the
inner rod 41 is positioned in the outer sleeve 42, a slurry cavity
43 is formed between the outer wall of the inner rod 41 positioned
in the outer sleeve 42 and the inner wall of the outer sleeve 42,
and the outer sleeve 42 is provided with a slurry inlet 422; the
plurality of telescopic rod components 4 are all connected with the
annular grouting channel 5, the telescopic direction of the
telescopic rod components 4 is parallel to the loading direction of
the loading unit component 1, and the slurry inlet 422 of each
outer sleeve 42 is located in the annular grouting channel 5; and
one end of each grouting pipe is connected with the annular
grouting channel 5, and the other end is a slurry inlet for
grouting each slurry cavity 43.
[0033] The inner rods 41 are fixed on the upper part of the loading
unit component 1, and the outer sleeves 42 are fixed on the lower
parts of the loading units 11; or the inner rods 41 are fixed to
the upper outer ring 12 and the outer sleeves are fixed to the
lower outer ring 51; or as shown in FIG. 8, the inner rods 41 are
fixed to the lower outer ring 51 and the outer sleeves 42 are fixed
to the upper outer ring 12.
[0034] In one embodiment, referring to FIGS. 2, 3 and 8, each
slurry inlet 422 is arranged at the top end of the corresponding
outer sleeve 42, the top end of each outer sleeve 42 is welded on
the grouting channel 5, and the bottom wall of the grouting channel
5 is provided with through holes matched with the slurry inlets
422.
[0035] In another embodiment, referring to FIGS. 6 and 7, each
slurry inlet 422 is arranged on the side wall of the corresponding
outer sleeve 42, the outer sleeves 42 are welded on the side wall
of the grouting channel 5, and the grouting channel 5 is provided
with through holes corresponding to the slurry inlets 422; and when
each slurry inlet 422 is arranged on the side wall of the
corresponding outer sleeve 42, there may be a plurality of slurry
inlets 422, and accordingly a plurality of grouting channels 5 may
be provided corresponding to the slurry inlets 422.
[0036] During the on-site installation of an engineering pile, the
inner rods 41 are welded to an upper reinforcement cage of the
engineering pile and wound tightly with steel wires, and the outer
sleeves 42 are welded to a lower reinforcement cage and wound
tightly with steel wires; or the inner rods 41 are welded to the
lower reinforcement cage of the engineering pile and wound with
steel wires, and the outer sleeves 42 are welded to the upper
reinforcement cage and wound with steel wires; during self-balanced
testing, grouting is carried out on each loading unit 11 through a
preset loading pipe, which refers to injecting hydraulic oil
herein, so that the upper part and the lower part of each loading
unit move relatively to drive the upper and lower reinforcement
cages to move up and down till a fracture surface is generated on
the engineering pile, and then self-balanced testing is completed;
in this process, the inner rods 41 move relatively in the outer
sleeves 42; after testing is completed, grouting is carried out on
the outer sleeves 42 through the grouting pipes and the annular
grouting channel 5, and after the slurry in the slurry cavity 43 in
each telescopic rod component 4 is solidified, the inner rods 41
and the outer sleeves 42 are fixed; and at this point, the upper
and lower reinforcement cage structures of the engineering pile are
continuously connected, which significantly improves the uplift
resistance and horizontal force resistance between the upper
reinforcement cage and the lower reinforcement cage, significantly
improves the overall structural strength of the foundation pile,
and restores or even exceeds the structural strength of the
original engineering pile.
[0037] The number of the telescopic rod components 4 is determined
according to the rule that the number of the telescopic rod
components 4 is the same as the number of main bars of the
reinforcement cage or meets the requirement of equal section
replacement, so that stable connection strength of the upper
reinforcement cage and the lower reinforcement cage can be realized
through the telescopic rod components 4.
[0038] Referring to FIGS. 6 and 7, during installation, only a
through hole with the size of the diameter of the inner rod 41 is
left at the upper end of the outer sleeve 42 for axial movement of
the inner rod 41, which allows slurry to be left in the slurry
cavity 43.
[0039] Referring to FIG. 2, the grouting pipes are sheaths 31 in
the lower displacement rod components 3, i.e. the lower end of the
sheath 31 in each lower displacement rod component 3 is welded on
the annular grouting channel 5 and communicates with the annular
grouting channel 5, the side wall of the lower end of each sheath
31 is provided with a grouting port 311, and the upper end extends
to the ground or is connected to the ground through a connecting
pipe. The arrangement can simplify the grouting structure,
facilitate operation, omit corresponding pipes and save cost.
[0040] Alternatively, the grouting pipe is an engineering pipe
body, one end of the pipe body is in butt joint with an interface
on the annular grouting channel 5 through a joint, and the other
end is a free end; and during installation, the free end is
positioned on the ground, and slurry enters the slurry cavity
through the pipe body and the annular grouting channel in sequence
during grouting.
[0041] Referring to FIG. 3, both the inner wall of each outer
sleeve 42 and the outer wall of each inner rod 41 located inside
the corresponding outer sleeve 42 are provided with groove
structures 411 and 421, and the groove structures are threaded
grooves. With this arrangement, when the slurry in the slurry
cavities 43 is solidified, the screw grooves 411 and 421 can
improve the bonding strength between the inner rods 41 and the
outer sleeves 42, which further improves the anti-uplift
strength.
[0042] Alternatively, referring to FIGS. 6 and 7, the bottom end of
each inner rod is provided with a limiting table 412 for preventing
the inner rod 41 from separating from the corresponding outer
sleeve 42, a gap is formed between the side face of the limiting
table 412 and the outer sleeve 42 to facilitate the circulation of
the slurry in the outer sleeve, and only a through hole allowing
the inner rod 41 to pass through is left at one end of the outer
sleeve 42.
[0043] Unless otherwise specified, in the invention, if the
azimuthal or positional relationship indicated by the terms
"width", "upper", "lower", "front", "rear", "left", "right",
"vertical", "horizontal", "top", "bottom", "inner", "outer",
"clockwise", "counterclockwise", "axial", "radial" and
"circumferential" are based on the azimuthal or positional
relationship shown in the drawings, they are only to facilitate and
simplify the description of the invention, rather than indicating
or implying that the mentioned device or element must have a
specific orientation, be constructed or operate in a specific
orientation. Therefore, the terms describing the azimuthal or
positional relationship in the invention are for illustrative
purposes only and should not be construed as limiting the present
patent. For those of ordinary skill in the art, the specific
meaning of the above terms can be understood in conjunction with
the drawings and according to the specific circumstances.
[0044] Unless otherwise specified or defined, the terms "arrange"
and "connect" in the invention should be understood broadly, for
example, they can be fixed connection, detachable connection or
integrated connection; can be direct connection, indirect
connection through an intermediate medium, or internal
communication of two components. For those of ordinary skill in the
art, the specific meaning of the above terms in the invention can
be understood in specific situations.
[0045] The above are only preferred embodiments of the invention,
and the scope of protection of the invention is not limited to the
above embodiments, but all technical schemes within the concept of
the invention fall within the scope of protection of the invention.
It should be noted that several improvements or embellishments made
by those of ordinary skill in the art without departing from the
principles of the invention should also be regarded as the scope of
protection of the invention.
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