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Foundation pit supporting and reinforcing structure and construction method

A technology for reinforcing structures and foundation pit support, applied in foundation structure engineering, excavation, sheet pile walls, etc., can solve problems such as deflection deformation and deflection deformation, achieve correction of deflection deformation, improve integrity and rigidity , The effect of reducing the reinforcement cost

Inactive Publication Date: 2021-02-23
云南建投第一勘察设计有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For general foundation pit support, bored cast-in-place piles are generally used, and horizontal reinforced concrete supports are set in the pit. When facing large building construction, such as large shopping malls, after the construction of the inner support is completed, there will be problems in the mid-span due to excessive column spacing. Due to the deflection and deformation, the supporting beam in the middle of the inner support has obvious downward deflection. How to use a simple and low-cost construction method in a relatively short period of time while ensuring sufficient support strength requirements is urgently needed. method to solve this problem

Method used

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  • Foundation pit supporting and reinforcing structure and construction method
  • Foundation pit supporting and reinforcing structure and construction method
  • Foundation pit supporting and reinforcing structure and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A support and reinforcement structure for a foundation pit, comprising a connecting steel pipe 2, an upper steel pipe 3, a steel bracket 4, and a lower steel pipe 5, characterized in that: the connecting steel pipe 2 is used as a column to support the supporting beam node 1, and the connecting steel pipe 2 The upper end is provided with steel sheets 201 around equilateral distances in the vertical direction. The steel sheets 201 are in the shape of a right triangle, and the other right-angle side is connected to the steel plate 200 connected to the top of the steel sheet 2, and is integrally formed with the steel plate 200. The supporting beam node 1 is placed on the steel plate 200, and in the connecting steel pipe 2, a flexible end is inserted into the iron 202 under the reinforced steel plate, and the top end of the connecting steel pipe 2 is connected in the upper steel pipe 3, and the interface between the two is provided Bottom form 203 is arranged, and described b...

Embodiment 2

[0049] Construction method:

[0050] 00) Prepare materials and construction equipment on site;

[0051] 01) Setting-out positioning: (1) Carry out setting-out work according to the layout of the pile position and the measurement reference point; (2) When setting out the pile position, first check whether there is overlap with the constructed engineering pile or the side-to-side distance is <25cm , continue to work if it does not exist; (3) RTK is used to position the stakes one by one, and steel nails or steel bar heads are used to mark and indicate the number of the piles and protect them. Steel nails are used as marks in each direction to ensure accurate positioning of the pile during construction; (4) When the accuracy of the pile location is affected by soil disturbance or other factors, it must be placed again; (5) The allowable deviation of the pile location is less than 10mm.

[0052] 02) The equipment is in place, and the point is reviewed;

[0053] 03) Steel pipe sp...

Embodiment 1-2

[0060] Based on the embodiment 1-2, a reinforcement and reinforcement structure for foundation pit support is applied in the application of reinforcement and reinforcement when the supporting beam in the middle of the support in the construction site has obvious downward deflection deformation.

[0061] In this embodiment, the total area of ​​the proposed project foundation pit is about 26861.1 square meters, the circumference is 651m, and the excavation depth is 4.2m-9.9m. The foundation pit support adopts a single row of support piles (φ600, φ800, φ1000mm) + 1 reinforced concrete inner support (ring support 1150*800mm, support 700*700mm) enclosure structure. After the construction of the internal support is completed, the earthwork excavation process In the middle, it was found that the braced beam in the middle of the inner support had obvious downward deflection deformation (the distance between the columns is too large, and the deflection deformation in the middle of the s...

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Abstract

The invention discloses a foundation pit supporting and reinforcing structure and a construction method, and particularly relates to the technical field of reinforcing structures and reinforcing methods of constructional engineering. According to the foundation pit supporting and reinforcing structure and the construction method, connecting steel pipes, upper steel pipes, steel brackets and lowersteel pipes are designed, the connecting steel pipes serve as stand column supporting beam joints, steel sheets are arranged at the upper ends of the connecting steel pipes in the vertical direction at equal intervals, the steel sheets are in a right triangle shape, and the other right-angle side is connected to steel plates at the top ends of the connecting steel sheets and integrally formed withthe steel plates. The integrity, rigidity, bearing capacity and bending resistance of the whole supporting system are improved, the height of the supporting position can be adjusted by changing the height of energy connecting columns, then down-warping deformation is corrected, and the reinforcing manufacturing cost is reduced; and meanwhile, the method is scientific according to a certain sequence, underground structure construction is not affected, the reinforcing effect is rapid and efficient, and application and popularization are convenient.

Description

technical field [0001] The invention relates to the technical field of reinforcement structures and reinforcement methods for construction engineering, in particular to a foundation pit support reinforcement structure and a construction method. Background technique [0002] With the continuous development of infrastructure construction, high-rise and high-quality buildings are gradually increasing. For such large buildings, to ensure their construction quality, their foundation pits will inevitably become larger and larger. deeper. For large and deep foundation pits, the construction of the supporting structure will become more and more difficult, and at the same time, new requirements are put forward for the supporting performance of the supporting structure. [0003] currently existing problems: [0004] For general foundation pit support, bored cast-in-situ piles are generally used, and horizontal reinforced concrete supports are set in the pit. When facing large buildi...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D5/34
CPCE02D17/04E02D5/34
Inventor 刘克文董天雷王城王永刚侯建伟贾荣谷张颖何定华黄建淞屈金华付永辉陈平
Owner 云南建投第一勘察设计有限公司
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