CN113502841A - Integral cast-in-place construction method of bearing platform pile - Google Patents
Integral cast-in-place construction method of bearing platform pile Download PDFInfo
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- CN113502841A CN113502841A CN202110942815.1A CN202110942815A CN113502841A CN 113502841 A CN113502841 A CN 113502841A CN 202110942815 A CN202110942815 A CN 202110942815A CN 113502841 A CN113502841 A CN 113502841A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to geotechnical engineering and discloses an integral cast-in-place construction method of a bearing platform pile. The method comprises the following steps: arranging a slurry discharge channel between the pile well and the slurry discharge groove, and backfilling foundation soil above the slurry discharge channel to the bottom elevation position of the bearing plate; arranging an integral reinforcement cage comprising a lower pile foundation, an upper pile foundation and a bearing plate; installing a template for pouring concrete on the bearing platform plate, and installing a first sectional template of an upper pile foundation; pouring concrete into the pile well of the lower pile foundation, so that slurry in the pile well is discharged to the slurry discharge groove through the slurry discharge channel, the slurry is prevented from rising to pollute the reinforcing steel bars of the bearing platform plate, and the slurry discharge channel is closed until the concrete is discharged from the slurry discharge channel; pouring concrete of the bearing platform plate; and when the concrete of the bearing platform plate is close to initial setting, pouring the first layered concrete of the upper pile foundation. The method can be efficiently connected, and after the structure is formed, the method has the characteristics of good integrity, high strength, high bearing performance, simplicity in operation, quickness in construction, good economy, environmental friendliness, convenience in popularization and the like.
Description
Technical Field
The invention relates to geotechnical engineering, in particular to an integral cast-in-situ construction method of a bearing platform pile.
Background
The application of the reinforced pile in geotechnical engineering is very wide, and because the traditional reinforced pile usually adopts the same section size, when the external force born by the traditional reinforced pile in the engineering application is larger, the section size required by design is larger or the pile length needs to be longer, so that the engineering investment is higher, the construction risk of the reinforced pile is increased, and when the foundation conditions are poorer, the adverse effect performance is more obvious.
And the adoption of the pile structure of the bearing platform can well solve the problems of the traditional reinforcing pile. For example, the utility model with application number CN201921320396.2 discloses a bearing platform type pile structure, the invention patent application with application number CN201910751658.9 discloses a bearing platform type pile structure and a construction method thereof, which can solve the problems of the traditional single-section reinforcing pile. The pile structure of bearing platform type includes underground section and upper section, the upper section is formed by assembling several prefabricated blocks, and the construction method is provided according to the underground section, the upper section and prefabricated installation contents. From the structure itself and the construction method, the structure is divided into three parts according to the underground section, the bearing platform and the ground section, although the structure parts are connected through reinforcing steel bars and fixed through mortar, the integral performance of the structure is poor, the vertical stressed reinforcing steel bars of all pile foundations cannot be pulled through and are connected only through the prestressed reinforcing steel bars, the concrete structure is not constructed at one time, the shearing strength, the bending strength and the like of the components are directly weakened, the structure formed by construction is poor in integrity and cannot bear larger external force, meanwhile, because the structure, particularly the upper prefabricated part, has more construction procedures, if one part has construction quality problems, the service performance of the whole structure is greatly reduced, and even instability and damage occur. If the structure can be constructed into an integral structure, the popularization and application prospect of the structure can be greatly improved.
Because the underground section of the structure usually adopts a non-vibration type grouting construction method of a slurry retaining wall and a vibration type pouring construction method of an upper section in a vertical template mode, all slurry in a hole must be discharged when the underground section is constructed to the ground, and the traditional construction methods have two types: (1) firstly, completing construction of a lower-underground pile foundation → clearing top of the lower pile foundation and ground slurry → binding of a structural reinforcement cage of a bearing platform → pouring concrete of the bearing platform by a vertical mold → binding of a reinforcement cage of the upper pile foundation → pouring concrete of an upper pile foundation by a segmented vertical mold; (2) firstly, completing the construction of the underground section pile foundation → clearing the top of the lower pile foundation and ground slurry → binding the reinforcement cage of the bearing platform structure and the upper pile foundation → pouring the concrete of the bearing platform → pouring the concrete of the upper pile foundation by the segmented vertical mold. The method (1) and the method (2) have two important processes, the connection time is too long, so that the concrete pouring construction of the bearing platform type reinforced pile is difficult to achieve better integrity, and one of the two important processes is that after the construction of the lower pile foundation is completed, mud on the pile top and the ground needs to be removed, then the reinforced concrete of the bearing platform part is constructed, and the concrete setting time difference between the lower pile foundation and the bearing platform structure is longer; and secondly, after the concrete of the bearing platform is poured, the upper pile foundation reinforced concrete can be vertically poured under the condition that the top support of the concrete of the bearing platform is stressed after the concrete strength reaches a certain requirement (at least after the concrete is initially set).
Disclosure of Invention
The invention aims to solve the technical problem of providing an integral cast-in-place construction method of a bearing platform pile so as to effectively solve the problems of difficult construction and poor integrity of the traditional bearing platform pile.
The invention discloses an integral cast-in-place construction method of a bearing platform pile, which comprises the following steps:
constructing a pile well of a lower pile foundation of the bearing platform pile, and performing wall protection on the pile well by adopting slurry;
excavating an exposed slurry discharge groove along the outer side of the pile of the bearing platform, arranging a slurry discharge channel between the pile well and the slurry discharge groove, backfilling foundation soil above the slurry discharge channel to the bottom elevation position of the bearing platform plate, and leveling the foundation at the lower part of the bearing platform plate;
arranging an integral reinforcement cage, wherein the integral reinforcement cage comprises a lower pile foundation, an upper pile foundation and a reinforcement cage of a bearing plate;
installing a template for pouring concrete on the bearing platform plate, and installing a first sectional template of an upper pile foundation;
pouring concrete into the pile well of the lower pile foundation, so that slurry in the pile well is discharged to the slurry discharge groove through the slurry discharge channel, the slurry is prevented from rising to pollute the reinforcing steel bars of the bearing platform plate, and the slurry discharge channel is closed until the concrete is discharged from the slurry discharge channel;
pouring concrete of the bearing platform plate;
when the concrete of the bearing platform plate is condensed to the extent that the poured concrete can not be gushed out from the lower part in the construction template of the upper pile foundation, pouring the first layered concrete of the upper pile foundation in the first subsection template of the upper pile foundation;
and installing other construction templates of the upper pile foundation in sections, and pouring upper concrete in layers until all concrete pouring of the upper pile foundation is completed.
Preferably, when the mud is used for wall protection of the pile well, the top elevation of the mud is 0.5-1.0m lower than the ground.
Preferably, the slurry discharge passage is formed by burying a plastic pipe between the pile well and the slurry discharge tank.
Preferably, when the concrete is poured into the pile well of the lower pile foundation, the flow rate of the poured concrete is consistent with the flow rate of the slurry discharged from the slurry discharge channel.
Preferably, the embedding length of the slurry discharge channel is 0.3-0.5m longer than the outer edge of the bearing plate.
Preferably, the slurry discharge channel is arranged on the side of the pile well closest to the edge of the bearing platform plate.
Preferably, when arranging the whole reinforcement cage, firstly, hoisting the reinforcement cage containing the whole length of the lower pile foundation and the upper pile foundation in the pile well, then binding the pile foundation plate reinforcement cage on the foundation around the pile foundation, and connecting and fixing the pile foundation plate reinforcement and the pile foundation reinforcement according to the structural design requirement.
Preferably, before installing the first segmental formwork of the upper pile foundation, a support foundation is constructed on the foundation, the top elevation of the support foundation is consistent with the top elevation of the bearing plate, and the first segmental formwork of the upper pile foundation is installed on the support foundation.
Preferably, the supporting foundation is arranged on the foundation on two sides of the bearing plate;
the first section template of the upper pile foundation comprises a vertical part and a transverse part connected to the bottom of the vertical part;
and when the first section formwork of the upper pile foundation is installed, the transverse part is installed on the supporting foundation.
Preferably, the support foundation adopts press-in section steel or a reinforced concrete foundation, and the depth of the support foundation embedded in the foundation is not less than 0.5 m.
The invention has the beneficial effects that: the reinforcement cage of the lower pile foundation, the bearing plate and the upper pile foundation is integrally formed, and the integrity is good;
through the embedded slurry discharging channel, the problem that the lower pile foundation and the bearing platform are inconvenient to clean by integrally pouring slurry is solved, the bearing platform and upper pile foundation reinforcing steel bars are prevented from being polluted by the slurry, the concrete pouring of the lower pile foundation and the concrete pouring of the bearing platform have no time difference, the slurry discharging channel slurry is utilized, the influence of surface slurry cleaning and slurry softening of a foundation in the traditional method is avoided, the slurry discharging channel is closed after concrete appears in the slurry discharging channel, the strength of the concrete left in the slurry discharging channel is high, and the bearing performance of the foundation below the bearing platform cannot be weakened after the slurry discharging channel is arranged;
the concrete pouring of the upper pile foundation does not need to wait for the construction after the initial setting of the concrete of the bearing platform plate, so that the concrete of the upper pile foundation and the bearing platform plate is not influenced by longer construction time interval; therefore, the construction method enables the steel bars and the concrete of the pile structure of the bearing platform to be efficiently connected in the pouring construction, and the structure is good in integrity, high in strength and high in bearing performance after being formed;
in general, the construction method has the characteristics of simplicity in operation, quickness in construction, good economy, environmental friendliness, benefit for popularization and the like.
Drawings
Fig. 1 is a schematic sectional view illustrating an integral cast-in-place construction method of a cap pile according to the present invention.
Fig. 2 is a schematic sectional view illustrating an upper pile foundation formwork according to the method for integrally cast-in-place construction of a cap pile of the present invention.
Fig. 3 is a schematic plan view illustrating an integral cast-in-place construction method of a cap pile according to the present invention.
Reference numerals: the construction method comprises the following steps of a lower pile foundation 11, an upper pile foundation 12, a bearing plate 13, a slurry discharge channel 2, a slurry discharge groove 3, a sedimentation tank 4, a support foundation 5, a first sectional formwork 61, a vertical part 611, a transverse part 612 and the rest of construction formworks 62.
Detailed Description
The present invention is further described below.
The invention discloses an integral cast-in-place construction method of a bearing platform pile, which comprises the following steps:
the method comprises the following steps of constructing a pile well of a lower pile foundation 11 of a pile cap pile, and protecting the wall of the pile well by adopting slurry, wherein the slurry can form a mud skin on the wall of a groove under the action of static pressure, so that the collapse of the groove and the wall of the hole can be effectively prevented, and in the preferred embodiment of the application, the top elevation of the slurry is 0.5-1.0m lower than the ground so as to prevent the slurry from influencing an upper structure;
excavating an exposed slurry discharge groove 3 along the outer side of a pile of the bearing platform, arranging a slurry discharge channel 2 between a pile well and the slurry discharge groove 3, backfilling foundation soil above the slurry discharge channel 2 to the bottom surface elevation position of the bearing platform plate 13, and leveling a foundation at the lower part of the bearing platform plate 13, wherein the slurry discharge groove 3 is usually communicated with a slurry sedimentation tank 4 so as to facilitate the subsequent treatment of slurry;
arranging an integral reinforcement cage, wherein the integral reinforcement cage comprises a lower pile foundation 11, an upper pile foundation 12 and a bearing platform plate 13, and the integrity of the bearing platform pile can be ensured by the integral reinforcement cage;
installing a template for pouring concrete on the bearing platform plate 13, installing a first sectional template 61 of the upper pile foundation 12, and installing the first sectional template 61 of the upper pile foundation 12 by adopting multi-section construction;
pouring concrete into the pile well of the lower pile foundation 11, so that slurry in the pile well is discharged to the slurry discharge groove 3 through the slurry discharge channel 2, the slurry is prevented from rising to pollute the reinforcing steel bars of the bearing plate 13, the slurry discharge channel 2 is closed until the slurry discharge channel 2 discharges the concrete, and the slurry discharge channel 2 discharges the concrete to indicate that the slurry is basically discharged, so that the slurry discharge channel 2 can be closed;
pouring the concrete of the bearing plate 13, and paying attention to the vibration compaction during pouring;
when the concrete of the bearing platform plate 13 is condensed to the extent that the cast concrete in the construction template of the upper pile foundation 12 can not be poured from the lower part, the first layered concrete of the upper pile foundation 12 is poured in the first sectional template 61 of the upper pile foundation 12, and usually when the concrete of the bearing platform plate 13 is close to initial setting, the cast concrete in the construction template of the upper pile foundation 12 can be ensured not to be poured from the lower part;
installing the rest of the construction templates 62 of the upper pile foundation 12, and pouring the upper concrete until all the concrete pouring of the upper pile foundation 12 is completed, wherein the concrete construction can refer to the existing pile foundation construction mode, generally, the rest of the construction templates 62 of the upper pile foundation 12 are installed in sections, and the layered pouring is carried out.
The slurry discharge channel 2 is used for discharging slurry in the pile well, specifically, a plastic pipe, a metal pipe or a concrete pipe such as PVC (polyvinyl chloride), PPR (polypropylene random copolymer) is buried between the pile well and the slurry discharge groove 3 to form the slurry discharge channel 2, and a ditch containing a cover plate can be poured or built to form the slurry discharge channel 2. The diameter of the discharge channel 2 is typically 0.5-0.8 m.
As a preferred embodiment of the present application, when concrete is poured into the pile well of the lower pile foundation 11, the flow rate of the poured concrete is kept consistent with the flow rate of the slurry discharged from the slurry discharge channel 2, so as to prevent the slurry from being discharged in time and rising to pollute the bearing platform 13 and the steel bars of the upper pile foundation 12. In addition, the length of the slurry discharge channel 2 is embedded to be 0.3-0.5m longer than the outer edge of the bearing plate 13, so that the discharged slurry can not pollute the reinforcing steel bars of the bearing plate 13 and influence the foundation of the bearing plate 13.
The width of the bearing plate 13 is typically 2-4m, and as shown in fig. 1, in order to shorten the slurry discharge channel 2 as much as possible and ensure smooth slurry discharge, the slurry discharge channel 2 is disposed on the side of the pile well closest to the edge of the bearing plate 13.
Whole steel reinforcement cage contains lower part pile foundation 11, upper portion pile foundation 12 and bearing platform board 13, can adopt ready-made ligature or prefabricated mode, and in the preferred embodiment of this application, when arranging whole steel reinforcement cage, the steel reinforcement cage who puts into the whole length of containing lower part pile foundation 11 and upper portion pile foundation 12 is hoisted in the pile well earlier, then ligature bearing platform board 13 steel reinforcement cage on the foundation all around of pile foundation to it is fixed with pile foundation steel bar connection according to structural design requirement 13 steel bars of bearing platform board. The steel reinforcement cage that contains the whole length of lower part pile foundation 11 and upper portion pile foundation 12 carries out the prefabrication earlier, then wholly hangs into in the stake well, not only can effectively improve preparation and efficiency of construction, can guarantee the wholeness of lower part pile foundation 11 and upper portion pile foundation 12 moreover, and it is more convenient to carry out the ligature construction again after the steel reinforcement cage of cushion cap board 13.
The first sectional form 61 of the upper pile foundation 12 may be installed on a form in which concrete is poured on the pile cap plate 13, or may be installed by providing a foundation separately, and in consideration of load bearing capacity, the latter form is adopted in the preferred embodiment of the present application: before installing first sectional formwork 61 of upper portion pile foundation 12, construction support basis 5 on the ground, support basis 5 top elevation unanimous with the top elevation of bearing platform board 13, install first sectional formwork 61 of upper portion pile foundation 12 on support basis 5, then first sectional formwork 61 bottom elevation of upper portion pile foundation 12 is unanimous with the top elevation of bearing platform board 13 to concrete spills when can avoid the first layering concrete placement of upper portion pile foundation 12. The supporting foundation 5 can be a pressed-in profile steel or a reinforced concrete foundation, and the depth of the pressed-in profile steel or the reinforced concrete foundation is not less than 0.5 m. The support foundation 5 can more stably support the first section formwork 61 of the upper pile foundation 12, and the structural stability is ensured.
The support foundation 5 can be arranged within the confines of the counter plate 13 or outside the counter plate 13, wherein the latter is preferred, so that the influence of the support foundation 5 on the placement of the counter plate 13 can be avoided. Therefore, in the preferred embodiment of the present application, the supporting base 5 is disposed on the foundation on both sides of the deck plate 13; the first sectional formwork 61 of the upper pile foundation 12 comprises a vertical part 611 and a transverse part 612 connected to the bottom of the vertical part 611; the lateral portion 612 is installed on the support foundation 5 when the first sectional form 61 of the upper pile foundation 12 is installed. As shown in fig. 2, the vertical part 611 and the horizontal part 612 of the first section form 61 of the upper pile foundation 12 form an L-shaped structure, the vertical part 611 is generally the same as the thickness of other upper construction forms, the thickness and width of the horizontal part 612 need to meet the stress requirement of the weight of the upper pile foundation 12 construction forms, and the width of the horizontal part 612 is generally not less than 0.3 m.
Claims (10)
1. The integral cast-in-place construction method of the bearing platform pile is characterized by comprising the following steps of:
constructing a pile well of a lower pile foundation (11) of the bearing platform pile, and protecting the wall of the pile well by adopting slurry;
excavating an exposed slurry discharge groove (3) along the outer side of the pile of the bearing platform, arranging a slurry discharge channel (2) between the pile well and the slurry discharge groove (3), backfilling foundation soil above the slurry discharge channel (2) to the bottom elevation position of the bearing platform plate (13), and leveling the foundation at the lower part of the bearing platform plate (13);
arranging an integral reinforcement cage, wherein the integral reinforcement cage comprises a lower pile foundation (11), an upper pile foundation (12) and a bearing plate (13);
installing a template for pouring concrete on the bearing platform plate (13), and installing a first sectional template (61) of the upper pile foundation (12);
pouring concrete into the pile well of the lower pile foundation (11), so that slurry in the pile well is discharged to the slurry discharge groove (3) through the slurry discharge channel (2), the slurry is prevented from rising to pollute the reinforcing steel bars of the bearing plate (13), and the slurry discharge channel (2) is closed until the concrete is discharged from the slurry discharge channel (2);
pouring concrete on the bearing plate (13);
when the concrete of the bearing platform plate (13) is condensed to the extent that the poured concrete can not be gushed out from the lower part in the construction template of the upper pile foundation (12), pouring the first layered concrete of the upper pile foundation (12) in the first subsection template (61) of the upper pile foundation (12);
and installing the rest construction templates (62) of the upper pile foundation (12), and pouring upper concrete until all concrete pouring of the upper pile foundation (12) is completed.
2. The cast-in-place construction method of the pile of the bearing platform as claimed in claim 1, wherein: when the mud is used for protecting the wall of the pile well, the top elevation of the mud is 0.5-1.0m lower than the ground.
3. The cast-in-place construction method of the pile of the bearing platform as claimed in claim 1, wherein: the slurry discharge channel (2) is formed by embedding a plastic pipeline between the pile well and the slurry discharge groove (3).
4. An integral cast-in-place construction method of a cap pile as claimed in claim 1 or 3, wherein: when concrete is poured into the pile well of the lower pile foundation (11), the flow rate of the poured concrete is consistent with the flow rate of slurry discharged from the slurry discharge channel (2).
5. The cast-in-place construction method of the pile of the bearing platform as claimed in claim 1, wherein: the embedding length of the slurry discharge channel (2) is 0.3-0.5m longer than the outer edge of the bearing plate (13).
6. The cast-in-place construction method of the pile of the bearing platform as claimed in claim 1, wherein: the slurry discharge channel (2) is arranged on one side of the pile well closest to the edge of the bearing plate (13).
7. The cast-in-place construction method of the pile of the bearing platform as claimed in claim 1, wherein: when arranging whole steel reinforcement cage, hoist earlier in the pile shaft and put into the steel reinforcement cage that contains lower part pile foundation (11) and upper portion pile foundation (12) overall length, then ligature bearing platform board (13) steel reinforcement cage on the foundation around the pile foundation to it is fixed with pile foundation steel bar connection according to structural design requirement bearing platform board (13) reinforcing bar.
8. The cast-in-place construction method of the pile of the bearing platform as claimed in claim 1, wherein: before installing the first sectional formwork (61) of the upper pile foundation (12), constructing a support foundation (5) on the foundation, wherein the top elevation of the support foundation (5) is consistent with that of the bearing plate (13), and installing the first sectional formwork (61) of the upper pile foundation (12) on the support foundation (5).
9. The cast-in-place construction method of the pile of the bearing platform as claimed in claim 8, wherein: the supporting foundation (5) is arranged on the foundation on two sides of the bearing plate (13);
the first section template (61) of the upper pile foundation (12) comprises a vertical part (611) and a transverse part (612) connected to the bottom of the vertical part (611);
when the first section formwork (61) of the upper pile foundation (12) is installed, the transverse part (612) is installed on the support base (5).
10. An integral cast-in-place construction method of a cap pile as claimed in claim 8 or 9, wherein: the supporting foundation (5) adopts press-in section steel or a reinforced concrete foundation, and the depth of the press-in section steel embedded in the foundation is not less than 0.5 m.
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| CN202110942815.1A CN113502841B (en) | 2021-08-17 | 2021-08-17 | Integral cast-in-place construction method of bearing platform pile |
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| CN202110942815.1A CN113502841B (en) | 2021-08-17 | 2021-08-17 | Integral cast-in-place construction method of bearing platform pile |
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| CN113502841B CN113502841B (en) | 2023-01-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101787698A (en) * | 2010-03-24 | 2010-07-28 | 陕西长嘉实业发展有限公司 | Anti-corrosion inclusion bored concrete pile used for saline soil foundation and construction method thereof |
| CN107806099A (en) * | 2017-11-03 | 2018-03-16 | 五邑大学 | A kind of rigid pile composite foundation stake top filling system and its construction method |
| CN108130917A (en) * | 2017-12-25 | 2018-06-08 | 中国二十冶集团有限公司 | Pile foundation earth-retaining wall construction method |
| CN210395451U (en) * | 2019-05-31 | 2020-04-24 | 中国建筑第八工程局有限公司 | Connecting and guiding device for basement pile foundation construction |
| CN212611713U (en) * | 2020-06-29 | 2021-02-26 | 中铁二院工程集团有限责任公司 | Bearing platform type pile plate wall structure |
-
2021
- 2021-08-17 CN CN202110942815.1A patent/CN113502841B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787698A (en) * | 2010-03-24 | 2010-07-28 | 陕西长嘉实业发展有限公司 | Anti-corrosion inclusion bored concrete pile used for saline soil foundation and construction method thereof |
| CN107806099A (en) * | 2017-11-03 | 2018-03-16 | 五邑大学 | A kind of rigid pile composite foundation stake top filling system and its construction method |
| CN108130917A (en) * | 2017-12-25 | 2018-06-08 | 中国二十冶集团有限公司 | Pile foundation earth-retaining wall construction method |
| CN210395451U (en) * | 2019-05-31 | 2020-04-24 | 中国建筑第八工程局有限公司 | Connecting and guiding device for basement pile foundation construction |
| CN212611713U (en) * | 2020-06-29 | 2021-02-26 | 中铁二院工程集团有限责任公司 | Bearing platform type pile plate wall structure |
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| CN113502841B (en) | 2023-01-20 |
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