CN112663637A - Construction method applied to high-low span pile foundation of side slope - Google Patents
Construction method applied to high-low span pile foundation of side slope Download PDFInfo
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- CN112663637A CN112663637A CN202011503776.7A CN202011503776A CN112663637A CN 112663637 A CN112663637 A CN 112663637A CN 202011503776 A CN202011503776 A CN 202011503776A CN 112663637 A CN112663637 A CN 112663637A
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Abstract
The invention discloses a construction method applied to a high-low span pile foundation of a side slope, which comprises the steps of firstly excavating the side slope, spraying side slope concrete support on the slope surface after the side slope is excavated, excavating the bottom surface of the side slope to the bottom elevation of the high span pile foundation, and then pouring a concrete leveling layer on a bearing layer; after the side slope concrete support and the leveling layer concrete reach the designed strength, the construction of the low-span pile foundation, the underground outdoor wall foundation and the basement outer wall is started, then the bearing platform is poured on the leveling layer concrete, the short column is constructed on the bearing platform, and finally the concrete top plate is poured on the short column concrete and the top of the basement outer wall after the concrete of the short column reaches the designed strength. The invention can quickly construct the basement outer wall and the low-span pile foundation after excavating the side slope, is convenient for operators to construct, shortens the construction period, and greatly reduces the risk of high-span pile foundation construction because the side slope excavation surface is reinforced and the construction is not required to be carried out at the high position of the side slope.
Description
Technical Field
The invention relates to a construction method applied to a high-low span pile foundation of a side slope, belonging to the technical field of building construction.
Background
When the side slope relates to high-low span pile foundation construction, if the pile foundation is directly arranged on the side slope, the conduction of upper structure force is realized, on one hand, construction machinery or manual excavation needs to construct an access road, the cost is increased, the construction of the lower basement outer wall and the low span pile foundation is influenced, and the construction period is prolonged; on the other hand, the danger of excavating the pile foundation on the side slope is large, so that rockfall and damage are easily caused to the basement outer wall and low-span pile foundation operators, and mechanical damage is caused to the side slope operators.
Disclosure of Invention
The invention aims to provide a construction method which is convenient to construct, low in cost, safe and reliable and is applied to a slope high-low span pile foundation, so as to solve the problems of difficulty in construction, high cost and potential safety hazard of the slope high-low span pile foundation.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method applied to a high-low span pile foundation of a side slope comprises the following steps:
firstly, determining the excavation range of a side slope according to the bottom elevation of a high-span pile foundation and the distance between a basement outer wall and the side slope, determining the gradient of an excavation surface according to the stability of the side slope, spraying side slope concrete support on a slope surface after the side slope is excavated, excavating the bottom surface of the side slope to the bottom elevation of the high-span pile foundation, and then pouring a concrete leveling layer on the side slope;
step two, after the side slope concrete support is stable, constructing a basement outer wall and a low-span pile foundation, excavating the low-span pile foundation and the basement outer wall foundation, then performing concrete pouring, pouring concrete of the basement outer wall foundation and the low-span pile foundation simultaneously when the concrete is poured to the bottom elevation of the basement outer wall foundation, and constructing the basement outer wall on the basement outer wall foundation after the concrete strength is reached;
thirdly, after the slope concrete support and the concrete leveling layer reach the designed strength, starting to set up a template of a bearing platform on the concrete leveling layer, reserving 50cm of connecting steel bars of the bearing platform in the direction of the upper short column by using the steel bars of the bearing platform, and then pouring bearing platform concrete;
step four, after concrete of the bearing platform is poured, detecting the strength of the bearing platform, after the strength meets the requirement, constructing a short column on the bearing platform, fixedly connecting steel bars in the short column with connecting steel bars on the bearing platform, and finally pouring concrete of the short column;
and fifthly, after the short column concrete and the basement outer wall reach the design strength, pouring a concrete top plate on the top of the short column concrete and the basement outer wall.
In the method, in order to avoid the influence of side slope excavation on the basement outer wall foundation, the distance from the excavation side line of the side slope to the basement outer wall is not less than 1.5 meters.
Compared with the prior art, the invention has the following beneficial effects: the invention can quickly construct basement exterior walls and low-span pile foundations after excavating side slopes, increases working surfaces, greatly accelerates construction progress, facilitates construction of operators, shortens construction period, has simple process and convenient operation, and greatly reduces safety risks of construction sites due to reinforcement of the side slope excavation surfaces.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention prior to its implementation;
fig. 2 is a schematic structural diagram after the present invention is implemented.
Description of reference numerals: 1-basement pile foundation, 2-short column, 3-side slope, 4-basement bottom plate, 5-basement outer wall, 6-basement outer wall foundation, 7-side slope concrete support, 8-bearing platform, 9-concrete leveling layer, 10-concrete top plate and 11-high-span pile foundation.
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 and 2, a construction method applied to a high-low span pile foundation of a side slope includes the following steps:
firstly, determining the excavation range of a side slope 3 according to the bottom elevation of a high-span pile foundation 11 and the distance between a basement outer wall 5 and the side slope, determining the gradient of an excavation surface according to the stability of the side slope 3, spraying a slope concrete support 7 on the slope surface after the side slope 3 is excavated, excavating the bottom surface of the side slope 3 to the bottom elevation of the high-span pile foundation 11, and then pouring a concrete leveling layer 9 on the bottom elevation; in order to avoid the influence of the excavation of the side slope 3 on the basement exterior wall foundation 6, the distance from the excavation side line of the side slope 3 to the basement exterior wall 5 is not less than 1.5 meters.
Step two, after the side slope concrete support 7 is stabilized, the basement outer wall 5 and the low-span pile foundation 1 are constructed, the low-span pile foundation 1 and the basement outer wall foundation 6 are excavated, concrete pouring is carried out, when the concrete is poured to the bottom elevation of the basement outer wall foundation 6, the basement outer wall foundation 6 and the low-span pile foundation 1 are simultaneously poured, and after the concrete strength is reached, the basement outer wall 5 is constructed on the basement outer wall foundation 6;
thirdly, after the slope concrete support 7 and the concrete leveling layer 9 reach the designed strength, a template of the bearing platform 8 is erected on the concrete leveling layer 9, connecting steel bars of 50cm are reserved in the direction of the upper short column 2 by the steel bars of the bearing platform 8, and then the bearing platform 8 concrete is poured;
step four, after concrete of the bearing platform 8 is poured, the strength of the bearing platform 8 needs to be detected, after the strength meets the requirement, the short column 2 is constructed on the bearing platform 8, the steel bars in the short column 2 are fixedly connected with the connecting steel bars on the bearing platform 8, and finally concrete of the short column 2 is poured;
and fifthly, after the concrete of the short column 2 and the outer wall 5 of the basement reach the design strength, pouring a concrete top plate 10 on the tops of the concrete of the short column 2 and the outer wall 5 of the basement.
In conclusion, the invention only needs to excavate the bottom elevation and the working face range of the high-span pile foundation 11, and does not need to excavate the construction sidewalk on the side slope 3, thereby reducing the construction cost; in addition, the basement outer wall 5 and the low-span pile foundation 1 can start construction simultaneously after the temporary slope support 7 is finished, and construction is started after the construction of the high-span pile foundation 11 is not needed, so that the construction progress is greatly improved, the material and mechanical turnover period is shortened, and the indirect cost is reduced. Meanwhile, because the construction technology of the side slope 3 is difficult, the potential safety hazard is large, and the low-span pile foundation 1 and the basement outer wall 5 have a certain height difference with the low-span pile foundation, high falling or broken stone rolling damage is easily formed, so that the side slope 3 does not need to be excavated in a large area, and the side slope is temporarily supported 7, so that the probability of the potential safety hazard is reduced.
Claims (2)
1. A construction method applied to a high-low span pile foundation of a side slope is characterized by comprising the following steps:
firstly, determining the excavation range of a side slope (3) according to the bottom elevation of a high-span pile foundation (11) and the distance between a basement outer wall (5) and the side slope, determining the gradient of an excavation surface according to the stability of the side slope (3), spraying a slope concrete support (7) on the slope surface after the side slope (3) is excavated, excavating the bottom surface of the side slope (3) to the bottom elevation of the high-span pile foundation (11), and then pouring a concrete leveling layer (9) on the side slope;
step two, after the side slope concrete support (7) is stabilized, the basement outer wall (5) and the low-span pile foundation (1) are constructed, the low-span pile foundation (1) and the basement outer wall foundation (6) are firstly excavated, then concrete pouring is carried out, when the concrete is poured to the bottom elevation of the basement outer wall foundation (6), the basement outer wall foundation (6) and the low-span pile foundation (1) are simultaneously poured, and after the concrete strength is reached, the basement outer wall (5) is constructed on the basement outer wall foundation (6);
thirdly, after the side slope concrete support (7) and the concrete leveling layer (9) reach the designed strength, starting to set up a template of a bearing platform (8) on the concrete leveling layer (9), reserving 50cm of connecting steel bars for the steel bars of the bearing platform (8) towards the upper short column (2), and then pouring concrete of the bearing platform (8);
step four, after concrete of the bearing platform (8) is poured, detecting the strength of the bearing platform (8), after the strength meets the requirement, constructing the short column (2) on the bearing platform (8), fixedly connecting the steel bars in the short column (2) with the connecting steel bars on the bearing platform (8), and finally pouring concrete of the short column (2);
and fifthly, after the concrete of the short column (2) and the basement outer wall (5) reach the design strength, pouring a concrete top plate (10) on the tops of the concrete of the short column (2) and the basement outer wall (5).
2. The construction method applied to the high-low span pile foundation of the side slope according to claim 1, characterized in that: the distance between the excavation sideline of the side slope (3) and the basement outer wall (5) is not less than 1.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011503776.7A CN112663637A (en) | 2020-12-18 | 2020-12-18 | Construction method applied to high-low span pile foundation of side slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011503776.7A CN112663637A (en) | 2020-12-18 | 2020-12-18 | Construction method applied to high-low span pile foundation of side slope |
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| CN112663637A true CN112663637A (en) | 2021-04-16 |
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| CN202011503776.7A Pending CN112663637A (en) | 2020-12-18 | 2020-12-18 | Construction method applied to high-low span pile foundation of side slope |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2107128C1 (en) * | 1996-11-29 | 1998-03-20 | Гаврилов Геннадий Николаевич | Method and device for consolidation of earth slope |
| CN104975606A (en) * | 2015-06-29 | 2015-10-14 | 上海市基础工程集团有限公司 | Method for handling high-low strides at adjacent parts of reverse building foundation pit and adjacent foundation pit |
| CN105714849A (en) * | 2016-01-29 | 2016-06-29 | 中国华冶科工集团有限公司 | Reverse construction method for adjacent high and low floors (bays) of basement |
| CN110777802A (en) * | 2019-10-21 | 2020-02-11 | 中国建筑第八工程局有限公司 | Deep foundation pit high-low span supporting structure and construction method thereof |
-
2020
- 2020-12-18 CN CN202011503776.7A patent/CN112663637A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2107128C1 (en) * | 1996-11-29 | 1998-03-20 | Гаврилов Геннадий Николаевич | Method and device for consolidation of earth slope |
| CN104975606A (en) * | 2015-06-29 | 2015-10-14 | 上海市基础工程集团有限公司 | Method for handling high-low strides at adjacent parts of reverse building foundation pit and adjacent foundation pit |
| CN105714849A (en) * | 2016-01-29 | 2016-06-29 | 中国华冶科工集团有限公司 | Reverse construction method for adjacent high and low floors (bays) of basement |
| CN110777802A (en) * | 2019-10-21 | 2020-02-11 | 中国建筑第八工程局有限公司 | Deep foundation pit high-low span supporting structure and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 贺飞等: "高低跨深回填区的基础施工工艺", 《建筑施工》 * |
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Application publication date: 20210416 |
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