CN108487303B - Combined retaining wall of supporting pile and counterfort retaining wall and construction method - Google Patents
Combined retaining wall of supporting pile and counterfort retaining wall and construction method Download PDFInfo
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- CN108487303B CN108487303B CN201810283123.9A CN201810283123A CN108487303B CN 108487303 B CN108487303 B CN 108487303B CN 201810283123 A CN201810283123 A CN 201810283123A CN 108487303 B CN108487303 B CN 108487303B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0266—Retaining or protecting walls characterised by constructional features made up of preformed elements
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Abstract
The invention discloses a combined retaining wall of a support pile and a counterfort retaining wall and a construction method, wherein the combined retaining wall comprises the following steps: when a foundation pit is excavated, supporting piles and buttress retaining walls; the supporting piles comprise a plurality of supporting piles which are arranged in a row, the top of each supporting pile is provided with a crown beam which connects the supporting piles into a whole, the upper part of the buttress retaining wall is connected with the supporting piles through connecting beams, and the lower part of the buttress retaining wall is connected with the supporting piles through a bottom plate. For traditional counterfort retaining wall structure, the fender pile passes through even roof beam transmission horizontal tension, the effectual antidumping and the anti sliding ability that has increased counterfort retaining wall to full play the fender pile effect. The temporary supporting structure and the main structure bear different vertical loads, the settlement difference is easily generated, the cracking deformation is caused to influence the structure safety, but the structure is used in river bank supporting engineering, the upper load of the retaining wall is basically consistent with the upper load of the supporting pile, and the problem of uneven settlement cannot be generated.
Description
Technical Field
The invention relates to a combined retaining wall structure, in particular to a combined retaining wall based on supporting piles and a counterfort retaining wall and a construction method.
Background
With the continuous acceleration of urbanization, the urban land is less and less, which leads to more severe construction conditions in cities. In urban river transformation, retaining walls are often needed to support both banks of a river bank with a large depth. At present, a counterfort retaining wall is generally used in the project with larger retaining wall height, foundation pit excavation and supporting are needed in the retaining wall construction process, wherein a supporting pile is one of the commonly used means.
Adverse factors of the counterfort retaining wall in the construction process are as follows: 1. along with the increase of the supporting height, in order to ensure that the deformation meets the requirements, the thickness of the retaining wall needs to be increased, and the bottom plate needs to be widened and thickened, so that the area of the cross section of the retaining wall is increased, and the excavation depth is increased. The general construction site in the city is narrow and small, is influenced by limited site and surrounding environment, and is difficult to meet the requirements of width and depth. 2. After the construction of the main body of the support pile serving as a temporary support structure is finished, the support pile does not need to continuously play the role in the design of the conventional buttress retaining wall, but the role of the support pile on the stability of the side slope is not true, so that the resource waste is caused to a great extent.
Disclosure of Invention
The invention aims to overcome the existing problems and provide a river bank retaining wall supporting method with small section, large rigidity, small deformation and good overall performance, thereby better meeting the requirements of construction sites and ensuring the safety and stability of both banks of the river bank. The invention reduces the excavation depth of the foundation pit and the size of the retaining wall by a design method combining the support piles and the buttress retaining wall, and reduces the construction cost.
The technical scheme adopted by the invention is as follows:
the invention provides a combined retaining wall of a support pile and a counterfort retaining wall, which comprises: supporting piles and buttress retaining walls used during foundation pit excavation; the supporting piles comprise a plurality of supporting piles which are arranged in a row, the top of each supporting pile is provided with a crown beam, the crown beams connect the supporting piles into a whole, the upper part of the counterfort type retaining wall is connected with the supporting piles through connecting beams, and the lower part of the counterfort type retaining wall is connected with the supporting piles through a bottom plate.
Further, in order to better connect the buttress-type retaining wall with the support piles, the thickness of the bottom plate is increased appropriately.
Furthermore, buttress retaining wall top reinforcing bar is encrypted, prevents to take place local shear failure with even roof beam junction.
Furthermore, the connecting beams comprise a plurality of connecting beams, and the connecting beams are horizontally arranged and arranged in a row and have the same height in the height direction.
Furthermore, a plurality of the connecting beams are distributed at equal intervals or distributed at different intervals according to the load condition, so that the uniform stress is ensured.
Furthermore, a plurality of fender piles are distributed at equal intervals or distributed at different intervals according to the load condition, so that the uniform stress is ensured.
The concrete supporting method of the combined retaining wall using the supporting piles and the buttress retaining walls comprises the following steps:
the first step is as follows: constructing support piles, namely constructing the support piles before excavation of earthwork, wherein the support piles are arranged in a row at a certain interval along the longitudinal direction of a support range; then after the strength of the supporting piles meets the requirement of excavation strength, excavating, chiseling off pile heads, arranging crown beams at the tops of the supporting piles, extending reinforcing steel bars of the supporting piles into the crown beams, and connecting the supporting piles into a whole by the crown beams; reserving reinforcing steel bars on the inner side of the crown beam to be connected with the connecting beam;
the second step is that: excavating the earth to a designed elevation, and if a horizontal anchor rod needs to be constructed when the foundation pit is deep, excavating to the designed elevation step by step, wherein the anchor rod is a temporary component and is not used as a part of the combined structure;
the third step: constructing a bottom plate of the combined structure, wherein reinforcing steel bars of the bottom plate are connected with the supporting piles through embedded reinforcing steel bars of the embedded reinforcing steel bars or the supporting piles;
the fourth step: constructing side walls and buttresses of the combined structure; the side walls and the buttresses form a buttressing wall type retaining wall.
The fifth step: and constructing a connecting beam with the top connected with the supporting pile crown beam.
The invention has the beneficial effects that:
the invention relates to a method for designing a combined retaining wall, which combines a novel retaining wall structure by supporting piles and a counterfort retaining wall. The method fully considers the permanent action of the temporary supporting structure, and effectively reduces the engineering cost. Meanwhile, the pile wall supporting structure has the advantages of small section, high rigidity, small deformation, good overall performance and the like.
For traditional counterfort retaining wall structure, the fender pile passes through even roof beam transmission horizontal tension, the effectual antidumping and the anti sliding ability that has increased counterfort retaining wall to full play the fender pile effect. The temporary supporting structure and the main structure bear different vertical loads, the settlement difference is easily generated, the cracking deformation is caused to influence the structure safety, but the structure is used in river bank supporting engineering, the upper load of the retaining wall is basically consistent with the upper load of the supporting pile, and the problem of uneven settlement cannot be generated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic plan view of the retaining wall assembly of the present invention;
FIG. 2 is a schematic cross-sectional view of the retaining wall assembly of the present invention;
in the figure, 1, a support pile, 2, a counterfort retaining wall, 3, a coupling beam, 4, a counterfort retaining wall bottom plate, 5 and a crown beam.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, in the prior art, as the supporting height is increased, in order to ensure the safety of the constructed retaining wall, the thickness of the retaining wall needs to be increased, and the bottom plate needs to be widened and thickened, so that the sectional area of the retaining wall is increased, and the excavation depth is increased. The general construction site in the city is narrow and small, is influenced by limited site and surrounding environment, and is difficult to meet the requirements of width and depth. 2. The utility model provides a combined retaining wall of fender pile and buttress formula retaining wall, this application has provided a fender pile and buttress formula retaining wall's combined retaining wall, and this has just caused the wasting of resources of very big degree as temporary supporting construction need not continue to play its effect in conventional buttress formula retaining wall design after the main part construction.
In a typical embodiment of the present application, as shown in fig. 1, the present invention provides a combined retaining wall form of buttress piles 1 and buttress retaining walls 2, in which buttress retaining walls 2 and buttress piles 1 are combined together to form a retaining wall structure through tie beams 3 and a bottom plate 4, and the horizontal bearing capacity of the buttress piles is transferred to the buttress retaining walls 2 through the tie beams 3 and the bottom plate 4, so as to effectively improve the anti-overturning and anti-sliding capacities of the buttress retaining walls 2;
specifically, the supporting piles 1 comprise a plurality of supporting piles which are arranged in a row, and the tops of the supporting piles 1 are connected through crown beams 5 to form a whole; the bottom of the counterfort retaining wall 2 is connected with the support pile 1 through a bottom plate, and the upper part is connected through a connecting beam 3; the counterfort type retaining wall 2 comprises a side wall and a counterfort, wherein a bottom plate is arranged at the bottom of the side wall to form a right angle, and the counterfort is arranged in the right angle formed by the side wall and the counterfort.
The connecting beams 3 comprise a plurality of connecting beams 3 which are equal in height in the height direction, the distance between every two adjacent connecting beams is equal, and the connecting beams are uniformly distributed to ensure the uniformity of stress.
The reinforcing steel bars at the top of the vertical side wall of the combined structure are encrypted, and a hidden beam is arranged to prevent the joint of the hidden beam and the connecting beam from being damaged by local shearing.
The bottom plate is arranged in the middle of the support pile and is not the bottom, so that stress is guaranteed.
Furthermore, a plurality of connecting beams are distributed at equal intervals, so that the uniform stress is ensured.
Furthermore, a plurality of fender piles are distributed at equal intervals, so that the stress is ensured to be uniform.
The specific implementation method is as follows:
the first step is as follows: constructing support piles, namely constructing the support piles before excavation of earthwork, wherein the support piles are arranged in a row at a certain interval along the longitudinal direction of a support range; then after the strength of the supporting piles meets the requirement of excavation strength, excavating, chiseling off pile heads, arranging crown beams at the tops of the supporting piles, extending reinforcing steel bars of the supporting piles into the crown beams, and connecting the supporting piles into a whole by the crown beams; reserving reinforcing steel bars on the inner side of the crown beam to be connected with the connecting beam;
the second step is that: excavating the earth to a designed elevation, and if a horizontal anchor rod needs to be constructed when the foundation pit is deep, excavating to the designed elevation step by step, wherein the anchor rod is a temporary component and is not used as a part of the combined structure;
the third step: constructing a bottom plate of the combined structure, wherein reinforcing steel bars of the bottom plate are connected with the supporting piles through embedded reinforcing steel bars of the embedded reinforcing steel bars or the supporting piles;
the fourth step: constructing side walls and buttresses of the combined structure; the side walls and the buttresses form a buttressing wall type retaining wall.
The fifth step: and constructing a connecting beam with the top connected with the supporting pile crown beam.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. The combined retaining wall comprises a plurality of supporting piles and a buttress retaining wall, wherein the supporting piles and the buttress retaining wall are used during foundation pit excavation, the supporting piles are arranged in a row, a crown beam is arranged at the top of each supporting pile and connects the plurality of supporting piles into a whole, the upper part of the buttress retaining wall is connected with the supporting piles through connecting beams, and the lower part of the buttress retaining wall is connected with the supporting piles through a bottom plate;
the construction method of the combined retaining wall is characterized by comprising the following steps:
the first step is as follows: constructing support piles, namely constructing the support piles before excavation of earthwork, wherein the support piles are arranged in a row at a certain interval along the longitudinal direction of a support range; then after the strength of the supporting piles meets the requirement of excavation strength, excavating, chiseling off pile heads, arranging crown beams at the tops of the supporting piles, extending reinforcing steel bars of the supporting piles into the crown beams, and connecting the supporting piles into a whole by the crown beams; reserving reinforcing steel bars on the inner side of the crown beam to be connected with the connecting beam;
the second step is that: excavating the earthwork to a designed elevation;
the third step: constructing a bottom plate of the combined structure, wherein reinforcing steel bars of the bottom plate are connected with the supporting piles through embedded reinforcing steel bars of the embedded reinforcing steel bars or the supporting piles;
the fourth step: constructing side walls and buttresses of the combined structure; the side walls and the buttresses form a buttressing wall type retaining wall;
the fifth step: and constructing a connecting beam with the top connected with the supporting pile crown beam.
2. The method of constructing a retaining wall combining a retaining pile and a buttress retaining wall according to claim 1, wherein if a deep foundation pit requires the construction of horizontal anchor rods, which are temporary members not included as a part of a combined structure, and excavation is performed step by step to a designed elevation.
3. The method of constructing a retaining wall of the combination of a retaining pile and a buttress retaining wall according to claim 1, wherein the thickness of the bottom plate is increased.
4. The method of constructing a retaining wall of the combination of a retaining pile and a buttress retaining wall of claim 1, wherein the top of the buttress retaining wall is reinforced.
5. The method of constructing a retaining wall comprising a combination of a retaining pile and a buttress retaining wall as claimed in claim 1, wherein the coupling beams comprise a plurality of coupling beams, and the plurality of coupling beams are horizontally arranged and aligned in a row and are equal in height in the height direction.
6. The method for constructing a retaining wall combining a retaining pile and a buttress retaining wall according to claim 1, wherein the coupling beams are distributed at equal intervals or at different intervals according to the load condition, so as to ensure uniform stress.
7. The method for constructing a retaining wall combining a support pile and a counterfort retaining wall according to claim 1, wherein the plurality of support piles are distributed at equal intervals or at different intervals according to the load condition, so as to ensure uniform stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283123.9A CN108487303B (en) | 2018-04-02 | 2018-04-02 | Combined retaining wall of supporting pile and counterfort retaining wall and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283123.9A CN108487303B (en) | 2018-04-02 | 2018-04-02 | Combined retaining wall of supporting pile and counterfort retaining wall and construction method |
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| CN108487303A CN108487303A (en) | 2018-09-04 |
| CN108487303B true CN108487303B (en) | 2020-05-15 |
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| CN201810283123.9A Active CN108487303B (en) | 2018-04-02 | 2018-04-02 | Combined retaining wall of supporting pile and counterfort retaining wall and construction method |
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| CN111274638B (en) * | 2020-01-20 | 2022-08-05 | 中铁二院工程集团有限责任公司 | Method for improving anti-overturning safety of existing balance weight retaining wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202850048U (en) * | 2012-09-04 | 2013-04-03 | 中铁二院工程集团有限责任公司 | High cantilever combination retaining wall structure |
| CN203080470U (en) * | 2013-02-21 | 2013-07-24 | 重庆交通大学 | Pile-bearing platform-barricade combined supporting and retaining structure |
| CN103306289B (en) * | 2013-06-28 | 2015-04-22 | 中国三冶集团有限公司 | Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof |
| CN103510525A (en) * | 2013-10-22 | 2014-01-15 | 天津大学 | Cascade support method of foundation trench of gravity type cement cob wall combined single-row piles |
| CN205296170U (en) * | 2015-10-22 | 2016-06-08 | 山东科技大学 | Combined type campshed underground structure |
| CN205502063U (en) * | 2016-04-01 | 2016-08-24 | 自贡市城市规划设计研究院有限责任公司 | Combined type retaining structure |
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