CN113152437A - Method for controlling protective layer and preventing hole collapse of reinforcement cage of rotary excavating cast-in-place pile - Google Patents
Method for controlling protective layer and preventing hole collapse of reinforcement cage of rotary excavating cast-in-place pile Download PDFInfo
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- CN113152437A CN113152437A CN202110270562.8A CN202110270562A CN113152437A CN 113152437 A CN113152437 A CN 113152437A CN 202110270562 A CN202110270562 A CN 202110270562A CN 113152437 A CN113152437 A CN 113152437A
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- reinforcement cage
- pile
- wire mesh
- steel wire
- binding
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
- E04C5/201—Spacer blocks with embedded separate holding wire or clips
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a method for controlling a protective layer of a rotary excavating cast-in-place pile reinforcement cage and preventing holes from collapsing, and relates to the technical field of building construction. The method for controlling and preventing hole collapse of the protective layer of the reinforcement cage of the rotary excavating cast-in-place pile comprises the following operations: and S1, after the rotary drilling mechanical drilling is qualified, binding the hole pile reinforcement cage on site, and S2, uniformly binding cushion blocks with the thickness equal to the designed thickness of the reinforcement cage protection layer on the outer side of the reinforcement cage along the circumferential direction and the length direction, wherein the cushion blocks are prefabricated cushion blocks. The method for controlling the protective layer of the reinforcement cage of the rotary excavating cast-in-place pile and preventing hole collapse aims at overcoming the defects that the reinforcement cage deviates when concrete is poured into the rotary excavating cast-in-place pile and peripheral loose soil or floating slag easily enters the reinforcement cage, and adopts a steel wire mesh isolation measure for the pile in the construction process, so that the integrity and the stability of the pile body are ensured, the isolation steel wire mesh is simple in structure and convenient to manufacture, and the forming quality of a pile foundation can be effectively controlled in the construction process.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a method for controlling and preventing hole collapse of a protective layer of a rotary excavating cast-in-place pile reinforcement cage.
Background
Along with the development of society and the continuous progress of construction industry, the quality requirement of the rotary excavating cast-in-place pile is continuously enhanced in the construction process, the rotary excavating cast-in-place pile foundation is used as a construction rotary excavating cast-in-place end bearing pile foundation, according to different special conditions of each construction site and the like, the bearing capacity of the pile foundation is easily influenced by the inclination of a pile foundation reinforcement cage when concrete is poured, peripheral loose soil or floating slag is easily introduced into the reinforcement cage to influence the concrete forming quality of the rotary excavating cast-in-place pile, and in order to avoid the occurrence of the conditions, the integrity and the stability of a pile body are ensured, and reliable hole collapse prevention measures must be taken for the pile in the construction process.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for controlling a protective layer and preventing holes from collapsing of a reinforcement cage of a rotary excavating cast-in-place pile, and solves the problems that the bearing capacity of a pile foundation is influenced because a pile foundation reinforcement cage is easy to incline when concrete is poured, and the concrete forming quality of the rotary excavating cast-in-place pile is influenced because peripheral loose soil or scum is easy to enter the reinforcement cage.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for controlling and preventing hole collapse of a protective layer of a reinforcement cage of a rotary excavating cast-in-place pile comprises the following operations:
s1, binding the hole pile reinforcement cage on site after the rotary drilling machinery is qualified in drilling and acceptance;
s2, uniformly binding cushion blocks with the thickness equal to the design thickness of a reinforcement cage protective layer along the circumference and the length direction outside the reinforcement cage, wherein the cushion blocks are prefabricated cushion blocks, the number of the cushion blocks is not less than 4 in the same cross section of the reinforcement cage according to the design requirement of a drawing, the cushion blocks are arranged in a plurality of layers according to a quincunx shape, the interlayer spacing along the length direction of the reinforcement cage is not more than 1 meter, two ends of each prefabricated cushion block are bound on the reinforcement cage by binding wires, and binding heads face the inner side of the reinforcement cage and are bent downwards;
s3, covering a layer of isolating steel wire mesh on the outer side of a cushion block by taking the cushion block as a support, binding the isolating steel wire mesh on the cushion block, wrapping the isolating steel wire mesh on the outer side of the cushion block on the steel reinforcement cage by using 4mm steel wire mesh, wherein the wrapping range is the whole steel reinforcement cage, joints of the steel wire mesh are connected by binding wires, and the lapping width is not less than 100 mm;
s4, placing the reinforcement cage fixed with the isolating steel wire mesh on the hole bottom bearing layer, and positioning;
and S5, pouring pile foundation concrete in the isolation layer.
(III) advantageous effects
The invention provides a method for controlling and preventing hole collapse of a protective layer of a reinforcement cage of a rotary excavating cast-in-place pile. The method has the following beneficial effects: the method for controlling the protective layer of the reinforcement cage of the rotary excavating cast-in-place pile and preventing hole collapse aims at overcoming the defects that the reinforcement cage deviates when concrete is poured into the rotary excavating cast-in-place pile and peripheral loose soil or floating slag easily enters the reinforcement cage, and adopts a steel wire mesh isolation measure for the pile in the construction process, so that the integrity and the stability of the pile body are ensured, the isolation steel wire mesh is simple in structure and convenient to manufacture, and the forming quality of a pile foundation can be effectively controlled in the construction process.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a top view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a method for controlling and preventing hole collapse of a protective layer of a reinforcement cage of a rotary excavating cast-in-place pile comprises the following operations:
s1, binding the hole pile reinforcement cage on site after the rotary drilling machinery is qualified in drilling and acceptance;
s2, uniformly binding cushion blocks with the thickness equal to the design thickness of a reinforcement cage protective layer along the circumference and the length direction outside the reinforcement cage, wherein the cushion blocks are prefabricated cushion blocks, the number of the cushion blocks is not less than 4 in the same cross section of the reinforcement cage according to the design requirement of a drawing, the cushion blocks are arranged in a plurality of layers according to a quincunx shape, the interlayer spacing along the length direction of the reinforcement cage is not more than 1 meter, two ends of each prefabricated cushion block are bound on the reinforcement cage by binding wires, and binding heads face the inner side of the reinforcement cage and are bent downwards;
s3, covering a layer of isolating steel wire mesh on the outer side of a cushion block by taking the cushion block as a support, binding the isolating steel wire mesh on the cushion block, wrapping the isolating steel wire mesh on the outer side of the cushion block on the steel reinforcement cage by using 4mm steel wire mesh, wherein the wrapping range is the whole steel reinforcement cage, joints of the steel wire mesh are connected by binding wires, and the lapping width is not less than 100 mm;
s4, placing the reinforcement cage fixed with the isolating steel wire mesh on the hole bottom bearing layer, and positioning;
and S5, pouring pile foundation concrete in the isolation layer.
To sum up, in order to overcome the defects that the reinforcement cage deviates and peripheral loose soil or floating slag easily enters the reinforcement cage when the concrete is poured into the rotary excavating cast-in-place pile, a steel wire mesh isolation measure is adopted for the pile in the construction process, the integrity and the stability of the pile body are ensured, the isolation steel wire mesh is simple in structure and convenient to manufacture, and the forming quality of a pile foundation can be effectively controlled in the construction process.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A method for controlling and preventing hole collapse of a protective layer of a reinforcement cage of a rotary excavating cast-in-place pile is characterized by comprising the following steps: the method comprises the following operations:
s1, binding the hole pile reinforcement cage on site after the rotary drilling machinery is qualified in drilling and acceptance;
s2, uniformly binding cushion blocks with the thickness equal to the design thickness of a reinforcement cage protective layer along the circumference and the length direction outside the reinforcement cage, wherein the cushion blocks are prefabricated cushion blocks, the number of the cushion blocks is not less than 4 in the same cross section of the reinforcement cage according to the design requirement of a drawing, the cushion blocks are arranged in a plurality of layers according to a quincunx shape, the interlayer spacing along the length direction of the reinforcement cage is not more than 1 meter, two ends of each prefabricated cushion block are bound on the reinforcement cage by binding wires, and binding heads face the inner side of the reinforcement cage and are bent downwards;
s3, covering a layer of isolating steel wire mesh on the outer side of a cushion block by taking the cushion block as a support, binding the isolating steel wire mesh on the cushion block, wrapping the isolating steel wire mesh on the outer side of the cushion block on the steel reinforcement cage by using 4mm steel wire mesh, wherein the wrapping range is the whole steel reinforcement cage, joints of the steel wire mesh are connected by binding wires, and the lapping width is not less than 100 mm;
s4, placing the reinforcement cage fixed with the isolating steel wire mesh on the hole bottom bearing layer, and positioning;
and S5, pouring pile foundation concrete in the isolation layer. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270562.8A CN113152437A (en) | 2021-03-12 | 2021-03-12 | Method for controlling protective layer and preventing hole collapse of reinforcement cage of rotary excavating cast-in-place pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270562.8A CN113152437A (en) | 2021-03-12 | 2021-03-12 | Method for controlling protective layer and preventing hole collapse of reinforcement cage of rotary excavating cast-in-place pile |
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| Publication Number | Publication Date |
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| CN113152437A true CN113152437A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110270562.8A Pending CN113152437A (en) | 2021-03-12 | 2021-03-12 | Method for controlling protective layer and preventing hole collapse of reinforcement cage of rotary excavating cast-in-place pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227900A (en) * | 2021-12-20 | 2022-03-25 | 河南五建第二建筑安装有限公司 | Prefabricating method of reinforcement cage for long spiral drilling pressure-grouting pile |
| CN114687340A (en) * | 2022-03-18 | 2022-07-01 | 中航勘察设计研究院有限公司 | Method for preventing hole wall from collapsing in reinforced concrete cast-in-place pile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131553A (en) * | 2014-03-21 | 2014-11-05 | 中国建筑第四工程局有限公司 | Drilling isolation method and structure for rotary drilling bored end-bearing pile foundation of slope building |
| CN211395654U (en) * | 2019-09-05 | 2020-09-01 | 中国二十冶集团有限公司 | Pile hole collapse-preventing steel reinforcement cage |
-
2021
- 2021-03-12 CN CN202110270562.8A patent/CN113152437A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131553A (en) * | 2014-03-21 | 2014-11-05 | 中国建筑第四工程局有限公司 | Drilling isolation method and structure for rotary drilling bored end-bearing pile foundation of slope building |
| CN211395654U (en) * | 2019-09-05 | 2020-09-01 | 中国二十冶集团有限公司 | Pile hole collapse-preventing steel reinforcement cage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227900A (en) * | 2021-12-20 | 2022-03-25 | 河南五建第二建筑安装有限公司 | Prefabricating method of reinforcement cage for long spiral drilling pressure-grouting pile |
| CN114687340A (en) * | 2022-03-18 | 2022-07-01 | 中航勘察设计研究院有限公司 | Method for preventing hole wall from collapsing in reinforced concrete cast-in-place pile |
| CN114687340B (en) * | 2022-03-18 | 2023-10-20 | 中航勘察设计研究院有限公司 | Method for preventing hole wall collapse in reinforced concrete cast-in-place pile |
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Application publication date: 20210723 |
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