CN110984178A - Foundation pit supporting structure and construction method thereof - Google Patents

Foundation pit supporting structure and construction method thereof Download PDF

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Publication number
CN110984178A
CN110984178A CN201911342080.8A CN201911342080A CN110984178A CN 110984178 A CN110984178 A CN 110984178A CN 201911342080 A CN201911342080 A CN 201911342080A CN 110984178 A CN110984178 A CN 110984178A
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CN
China
Prior art keywords
foundation pit
reinforcement cage
pouring
reinforcing
supporting
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CN201911342080.8A
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Chinese (zh)
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CN110984178B (en
Inventor
邓小燕
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Huizhou Shangxiang Construction Engineering Co Ltd
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Huizhou Shangxiang Construction Engineering Co Ltd
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Priority to CN201911342080.8A priority Critical patent/CN110984178B/en
Priority claimed from CN201911342080.8A external-priority patent/CN110984178B/en
Publication of CN110984178A publication Critical patent/CN110984178A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The invention discloses a foundation pit supporting structure and a construction method thereof, relating to the technical field of foundation pit construction, wherein the technical scheme comprises the following key points: the supporting wall comprises a reinforcement cage structure and reinforcing ribs connected to the reinforcement cage structure, concrete columns are connected to the reinforcement cage structure and the reinforcing ribs in a pouring mode, the reinforcing ribs are connected to the side wall of one side, away from the foundation pit, of the gully in a plugging mode, and concrete is poured into the reinforcement cage and the reinforcing ribs. The invention solves the technical problem that the construction in the foundation pit is influenced because a supporting structure is additionally arranged in the foundation pit and occupies a larger space, and has the advantage of reducing the occupied space of the supporting structure in the foundation pit.

Description

Foundation pit supporting structure and construction method thereof
Technical Field
The invention relates to the technical field of foundation pit construction, in particular to a foundation pit supporting structure and a construction method thereof.
Background
A foundation pit is a pit excavated during the process of building foundation construction in a construction project.
The foundation pit support is a supporting, blocking, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.
The existing foundation pit supporting structure comprises a ground connecting wall, a supporting pile and the like.
The construction method of the diaphragm wall comprises the following steps: before the foundation pit is excavated, gullies are excavated at the periphery of the position of the pre-excavated foundation pit, concrete is poured in the gullies, and the diaphragm wall is formed after the concrete is solidified.
And excavating the foundation pit after the diaphragm wall is finished, and supporting the side wall of the foundation pit through the diaphragm wall structure.
However, when the foundation pit is large and deep, a supporting structure is still required to be manufactured inside the foundation pit to support the diaphragm wall, so that the supporting strength of the diaphragm wall is improved.
The supporting structure is generally supported at one end at the bottom of the foundation pit and at the other end on the inner wall of the diaphragm wall.
The defects in the prior art are as follows: the supporting structure arranged in the foundation pit needs to occupy a larger space, and the construction inside the foundation pit is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to: the utility model provides a supporting construction of foundation ditch has the advantage that reduces supporting construction and to the shared space in the foundation ditch inside.
The technical purpose is achieved through the following technical scheme that the foundation pit supporting structure comprises gullies arranged on the periphery of the position of a foundation pit and a supporting wall poured in the gullies, the supporting wall comprises a reinforcement cage structure and reinforcing ribs connected to the reinforcement cage structure, concrete columns are poured and connected to the reinforcement cage structure and the reinforcing ribs, the reinforcing ribs are inserted and connected to the side wall of the gullies far away from the side of the foundation pit, and concrete is poured and connected to the reinforcement cage and the reinforcing ribs.
Through the technical scheme, the connecting strength of the supporting wall and the side wall can be improved through the connection of the reinforcing ribs and the side wall of the gully, the supporting wall is supported by the tension of the supporting wall through the side wall of the gully instead of the supporting wall inside the foundation pit, and therefore the occupied space inside the foundation pit can be saved.
Further, the reinforcing bars include two reinforcing bars parallel to each other and U-shaped connecting bars having both ends connected to one ends of the two reinforcing bars, respectively, and the reinforcing bars are inserted into sidewalls of the ravines through the reinforcement cage.
Through the technical scheme, the connecting rods and the reinforcing rods are arranged on the reinforcing ribs, so that the reinforcement cage can be bound between the two reinforcing rods, and the structural strength of the supporting wall is improved through the insertion connection with the side walls of gullies.
Furthermore, a first pouring formwork is abutted to one side of the connecting rod, which is far away from the reinforcing rod, a second pouring formwork is arranged on the side wall of the gully of one side of the first pouring formwork, which is far away from the reinforcing rod, and a pushing assembly is arranged between the first pouring formwork and the second pouring formwork, wherein two ends of the pushing assembly are abutted to the first pouring formwork and the second pouring formwork respectively.
According to the technical scheme, the first pouring template is fixed on the reinforcement cage through the pushing assembly, concrete is poured between the first pouring template and the gully, and a support wall is formed to serve as a foundation pit support structure.
Further, the pushing assembly comprises a first screwed pipe abutted to the first pouring template, a rotating rod in threaded connection with the first screwed pipe, a second screwed pipe in threaded connection with the rotating rod, and the second screwed pipe is connected to the second pouring template.
Through above-mentioned technical scheme, rotate through the dwang and let first screwed pipe and second screwed pipe keep away from each other, and then can realize the fixed of first template of pouring, convenient pouring to the buttress wall.
Further, a first pouring template and a first threaded pipe, and a second pouring template and a second threaded pipe which are detachably connected are respectively arranged between the first pouring template and the first threaded pipe and between the second pouring template and the second threaded pipe.
Through the technical scheme, the pushing assembly is detached through the connecting piece, and when the foundation pit is excavated, the first pouring template and the second pouring template are detached.
Furthermore, the connecting piece includes the first connecting groove of seting up on first pouring template and the first connecting plate of fixed connection on first screwed pipe.
Through above-mentioned technical scheme, realize pushing the subassembly and pour the connection of template through first connecting plate embedding first connecting groove.
Another technical object of the present invention is to provide a method for constructing a supporting structure of a foundation pit, comprising the steps of: and excavating gullies around the pre-excavated foundation pit, arranging reinforcement cages in the gullies, fixing the reinforcement cages on the side walls of the gullies through reinforcing ribs, pouring concrete in the gullies, and forming the support wall after the concrete is solidified.
Through the technical scheme, the connecting structures are arranged on the side walls of the formed supporting wall and the gully, the structural strength is better, collapse is not easy to occur, the mode of supporting from the inner side of the foundation pit is replaced, and the occupation of the supporting structure on the inner space of the foundation pit is reduced.
Further, the reinforcement cage is fixed by inserting the first reinforcement bar and the second reinforcement bar through the reinforcement cage and into the sidewalls of the gullies, and the tie bars abut against the reinforcement cage to reinforce the reinforcement cage.
Through the technical scheme, the first reinforcing rod and the second reinforcing rod are inserted into the side walls of the gullies and are abutted against the reinforcement cage through the connecting rods, so that the reinforcement cage is connected with the side walls of the gullies more stably.
In conclusion, the invention has the following technical effects:
1. the reinforcing ribs are connected with the side walls of the gullies, so that the connection strength of the supporting wall and the side walls can be improved, the supporting wall is supported by the tension of the side walls of the gullies instead of the supporting wall inside the foundation pit, and the occupied space inside the foundation pit can be saved;
2. the reinforcing ribs are arranged into the first reinforcing rods, the second reinforcing rods and the connecting rods, so that the first reinforcing rods and the second reinforcing rods are inserted into the side walls of the gullies, and the connecting structure is better.
Drawings
Fig. 1 is a schematic structural view of a foundation pit supporting structure in an embodiment;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a schematic structural view of a reinforcing bar in the embodiment.
Reference numerals: 1. a gully; 10. a pouring part; 11. a support portion; 2. a reinforcement cage; 3. Reinforcing ribs; 30. a first reinforcement bar; 31. a second reinforcement bar; 310. a tip; 32. a connecting rod; 4. a first pouring template; 5. a second pouring template; 6. A pushing assembly; 60. a first threaded pipe; 61. rotating the rod; 62. a second threaded pipe; 63. a drive handle; 64. a first connecting plate; 7. the rod is blocked.
Detailed Description
The embodiment provides a construction method of a foundation pit supporting structure, which comprises the following steps: step 1, referring to fig. 1, a gully 1 is excavated around a foundation pit, a reinforcement cage 2 is placed in the gully 1, and the reinforcement cage 2 is placed on one side of the gully 1 far away from the foundation pit.
Step 2, with reference to fig. 3, the reinforcement cage 2 is fixed, a plurality of reinforcing ribs 3 are uniformly distributed on the reinforcement cage 2, the reinforcement cage 2 is fixed by the reinforcing ribs 3, each reinforcing rib 3 includes two first reinforcing rods 30 and two second reinforcing rods 31 which are parallel to each other, one end of each first reinforcing rod 30 and one end of each second reinforcing rod 31 are fixedly connected with a U-shaped connecting rod 32, two ends of each connecting rod 32 are respectively and integrally connected to one end of each first reinforcing rod 30 and one end of each second reinforcing rod 31 which are far away from the connecting rods 32, and one ends of the first reinforcing rods 30 and the second reinforcing rods 31 which are far away from the connecting rods 32 are inserted into one side wall of the gully 1 which is far away from the.
The tie bars 32 are inserted into the sidewalls of the ravines 1 by hammering, and since the reinforcement cage 2 has elasticity, the tie bars 32 abut against the reinforcement cage 2 after hammering, and the depth of insertion of the tie bars 32 into the sidewalls of the ravines 1 is 30 cm.
The ends of the first and second stiffeners 30, 31 remote from the tie bar 32 are provided with tips 310 to facilitate insertion of the stiffeners into the sidewalls of the ravines 1, and the portions of the stiffeners inserted into the sidewalls of the ravines 1 are threaded to improve the security between the stiffeners and the sidewalls of the ravines 1.
The ravine 1 includes a cast portion 10 and a support portion 11, and the depth of the cast portion 10 is greater than the depth of the support portion 11. The depth of the supporting part 11 is the same as that of the foundation pit, and the reinforcement cage 2 is embedded into the pouring part 10.
Step 3, referring to fig. 3, a first casting pattern plate 4 is disposed in the gully 1 and attached to the connecting rod 32, and the first casting pattern plate 4 is located at the junction of the supporting portion 11 and the casting portion 10. A second pouring formwork 5 is placed on the side wall of one side of the foundation pit in the gully 1, a pushing assembly 6 is abutted between the first pouring formwork 4 and the second pouring formwork 5, the first pouring formwork 4 is abutted against the connecting rod 32 through the pushing assembly 6, and the second pouring formwork 5 is abutted against the inner wall of one side of the gully 1, which is close to the foundation pit.
The abutment assembly comprises a rotating rod 61 with a first threaded tube 60 screwed onto the first threaded tube 60, and a second threaded tube 62 screwed onto the rotating rod 61, the threads in the first threaded tube 60 and the second threaded tube 62 being opposite to each other.
The end of the first threaded pipe 60 away from the rotating rod 61 is named as a first connecting end, the end of the second threaded pipe 62 away from the rotating rod 61 is a second connecting end, the first connecting end is connected with a first connecting piece, and the second connecting end is connected with a second connecting piece.
The first connecting piece comprises a connecting plate rotatably connected with the first connecting end and a first pouring plate template; and a coupling groove, into which the first coupling plate 64 is inserted, having a depth smaller than the thickness of the first coupling plate 64. Two sides of the first connecting groove are rotatably connected with blocking rods 7 for preventing the first connecting plate 64 from being separated from the first connecting groove, and one side of each blocking rod 7, which is close to the first connecting plate 64, is an outwardly extending wedge-shaped surface.
The driving handle 63 is fixedly connected to the sidewall of the middle portion of the rotating rod 61, the driving handle 63 is rotated to abut the second casting form 5 against the sidewall of the gully 1 near the side of the foundation pit, and the first casting form 4 abuts against the connecting rod 32.
And 4, pouring concrete between the first pouring formwork 4 and the inner wall of the side, far away from the foundation pit, of the gully 1, so that the reinforcement cage 2 and the reinforcing ribs 3 are poured together with the concrete. Forming the support wall with higher strength.
And 5, removing the template and excavating the foundation pit, wherein the concrete work of template removal is as follows: rotatory pole 7 that stops, with first connecting plate 64 and first connecting groove, unblock between second connecting plate and the second connecting groove, rotatory dwang 61, let two first screwed pipes 60 and second screwed pipe 62 be close to each other, and then let first connecting plate 64 and first connecting groove, break away from between second connecting plate and the second connecting groove, take off and promote subassembly 6, then pour the board with first pouring and the board is taken off to the second, carry out the excavation of foundation ditch on the lateral wall along supporting part 11.
A foundation pit supporting structure, referring to fig. 1, includes a gully 1, the gully 1 includes a casting portion 10 and a supporting portion 11, the casting portion 10 is deeper than the supporting portion 11, a reinforcement cage 2 is embedded in the casting portion 10, the reinforcement cage 2 horizontally penetrates the reinforcement cage 2 and is provided with a plurality of reinforcing ribs 3, each reinforcing rib 3 includes two parallel first reinforcing rods 30 and second reinforcing rods 31, one end of each first reinforcing rod 30 and one end of each second reinforcing rod 31 are fixedly connected with a U-shaped connecting rod 32, the first reinforcing rods 30 and the second reinforcing rods 31 penetrate the reinforcement cage 2 and are inserted into the side walls of the gully 1, and the connecting rods 32 abut against the reinforcement cage 2.
Referring to fig. 3, the ends of the first and second reinforcement bars 30 and 31 remote from the tie bars 32 are provided with pointed ends 310, and the ends of the reinforcement bars inserted into the sidewalls of the ravines 1 are provided with threads for preventing slippage.
A first pouring plate is vertically placed between the supporting portion 11 and the pouring portion 10, a second pouring plate is vertically attached to the side wall of one side of the supporting portion 11 of the gully 1, a pushing assembly 6 is connected between the first pouring plate and the second pouring plate, a first connecting groove is formed in the first pouring plate, and a second connecting groove is formed in the second pouring plate at a position corresponding to the first connecting groove.
Referring to fig. 2, the pushing assembly 6 includes a first threaded tube 60, a threaded rod threaded onto the first threaded tube 60, and a second threaded tube 62 threaded onto an end of the threaded rod remote from the first threaded tube 60.
The first screwed pipe 60 is fixedly connected with a first connecting plate 64 at one end far away from the screwed rod, the first connecting plate 64 is embedded into the first connecting groove, the second screwed pipe 62 is fixedly connected with a second connecting plate at one end far away from the screwed rod, and the second connecting plate is embedded into the second embedding groove.
Stop rods 7 are rotatably connected on the two sides of the first connecting groove on the first pouring template 4 and the two sides of the second connecting groove on the second pouring template 5, wedge-shaped surfaces are arranged on one sides of the stop rods 7 close to the first pouring template 4 or the second pouring template 5,
the present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (8)

1. The utility model provides a foundation ditch supporting construction which characterized in that: the supporting wall comprises a gully (1) arranged on the periphery of a foundation pit position and a supporting wall poured in the gully (1), the supporting wall comprises a reinforcement cage (2) structure and reinforcing ribs (3) connected to the reinforcement cage (2) structure, concrete columns are poured and connected to the reinforcement cage (2) structure and the reinforcing ribs (3), the reinforcing ribs (3) are inserted and connected to the side wall of one side, far away from the foundation pit, of the gully (1), and concrete is poured on the reinforcement cage (2) and the reinforcing ribs (3).
2. A foundation pit supporting construction according to claim 1, wherein: the reinforcing bars (3) comprise two reinforcing rods which are parallel to each other and U-shaped connecting rods (32) of which two ends are respectively connected to one ends of the two reinforcing rods, and the reinforcing rods penetrate through the reinforcement cage (2) and are inserted into the side walls of the ravines (1).
3. A foundation pit supporting construction according to claim 2, wherein: the side, far away from the reinforcing rod, of the connecting rod (32) is abutted with a first pouring formwork (4), the side wall of a gully (1) of the first pouring formwork (4) far away from the reinforcing rod is provided with a second pouring formwork (5), and a pushing assembly (6) is arranged between the first pouring formwork (4) and the second pouring formwork (5), and two ends of the pushing assembly are abutted to the first pouring formwork (4) and the second pouring formwork (5) respectively.
4. A foundation pit supporting construction according to claim 3, wherein: the pushing assembly (6) comprises a first threaded pipe (60) abutted to the first pouring template (4), a rotating rod (61) in threaded connection with the first threaded pipe (60), a second threaded pipe (62) in threaded connection with the rotating rod (61), and the second threaded pipe (62) is connected to the second pouring template (5).
5. A foundation pit supporting construction according to claim 4, wherein: a first pouring template (4) and a first threaded pipe (60) and a second pouring template (5) and a second threaded pipe (62) are detachably connected and are arranged between the first pouring template (4) and the first threaded pipe (60) and between the second pouring template (5) and the second threaded pipe (62).
6. A foundation pit supporting construction according to claim 5, wherein: the connecting piece comprises a first connecting groove formed in the first pouring template (4) and a first connecting plate (64) fixedly connected to the first threaded pipe (60).
7. A construction method of a foundation pit supporting structure comprises the following steps: a gully (1) is excavated at the periphery of the pre-excavated foundation pit, a reinforcement cage (2) is arranged in the gully (1), the reinforcement cage (2) is fixed on the side wall of the gully (1) through a reinforcing rib (3), concrete is poured in the gully (1), and a support wall is formed after the concrete is solidified.
8. The construction method of a foundation pit supporting structure according to claim 7, wherein: the reinforcement cage (2) is fixed by inserting a first reinforcement bar (30) and a second reinforcement bar (31) through the reinforcement cage (2) and into the sidewalls of the ravines (1), and the tie bars (32) abut against the reinforcement cage (2) to reinforce the reinforcement cage (2).
CN201911342080.8A 2019-12-24 Foundation pit supporting structure and construction method thereof Active CN110984178B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911342080.8A CN110984178B (en) 2019-12-24 Foundation pit supporting structure and construction method thereof

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Application Number Priority Date Filing Date Title
CN201911342080.8A CN110984178B (en) 2019-12-24 Foundation pit supporting structure and construction method thereof

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CN110984178A true CN110984178A (en) 2020-04-10
CN110984178B CN110984178B (en) 2021-06-04

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004100281A (en) * 2002-09-10 2004-04-02 Takenaka Komuten Co Ltd Positioning method for permanent substructural column without using casing
CN207193985U (en) * 2017-07-25 2018-04-06 北京航天地基工程有限责任公司 Supporting construction and foundation pit support system
CN208201884U (en) * 2018-04-13 2018-12-07 嘉兴市嘉泽园艺有限公司 A kind of bridge pattern foundation pit supporting structure
CN208501698U (en) * 2018-06-28 2019-02-15 云南建投基础工程有限责任公司 The device of adjustable foundation pit steel support brace pre axial force
CN110106888A (en) * 2019-04-02 2019-08-09 刘侨 It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method
CN110185044A (en) * 2019-06-17 2019-08-30 中铁上海设计院集团有限公司 A kind of foundation pit side-wall Stress relief system for deep caving ground

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004100281A (en) * 2002-09-10 2004-04-02 Takenaka Komuten Co Ltd Positioning method for permanent substructural column without using casing
CN207193985U (en) * 2017-07-25 2018-04-06 北京航天地基工程有限责任公司 Supporting construction and foundation pit support system
CN208201884U (en) * 2018-04-13 2018-12-07 嘉兴市嘉泽园艺有限公司 A kind of bridge pattern foundation pit supporting structure
CN208501698U (en) * 2018-06-28 2019-02-15 云南建投基础工程有限责任公司 The device of adjustable foundation pit steel support brace pre axial force
CN110106888A (en) * 2019-04-02 2019-08-09 刘侨 It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method
CN110185044A (en) * 2019-06-17 2019-08-30 中铁上海设计院集团有限公司 A kind of foundation pit side-wall Stress relief system for deep caving ground

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