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Piled anchor and liquid nitrogen frozen soil wall combined support implementation method and supporting structure manufactured through method

An implementation method and composite support technology are applied in sheet pile wall, foundation structure engineering, excavation and other directions, which can solve the problems of long formation time of frozen soil wall, low construction efficiency of support structure, complicated construction, etc., and achieve convenient and fast construction. , Small footprint, good sealing effect

Inactive Publication Date: 2018-11-13
王海霖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for implementing composite support of pile anchors and liquid nitrogen frozen soil walls, so as to solve the structural components of the supporting structure in the prior art. low defect

Method used

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  • Piled anchor and liquid nitrogen frozen soil wall combined support implementation method and supporting structure manufactured through method
  • Piled anchor and liquid nitrogen frozen soil wall combined support implementation method and supporting structure manufactured through method
  • Piled anchor and liquid nitrogen frozen soil wall combined support implementation method and supporting structure manufactured through method

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Experimental program
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Effect test

Embodiment 1

[0045] The specific implementation method is as follows:

[0046] Step 1. First, set up a drainage system to prevent groundwater from affecting the construction of the supporting structure. Set up surface drainage, internal drainage of the support, and drainage of the foundation pit 5 to prevent the soil from being saturated and reduce the effect on the slope protection pile 1. Hydrostatic pressure on the surface.

[0047] Disperse water and various drainage ditches can be made around the top of the foundation pit 5. Drainage ditches and water collection pits can be set in the foundation pit 5. The distance between the drainage ditches and water collection pits and the side wall is 0.5~1.0m, and the water collection pits are accumulated It should be taken out in time.

[0048] Note: When the water pressure on the side wall of the foundation pit 5 is high, after the step 2 slope protection pile 1 is set, a horizontal water pipe with a length of 400-600mm and a diameter of not less th...

Embodiment 2

[0080] The difference between this embodiment and the first embodiment is that in step (2) of step 4, the liquid nitrogen supply pipeline adopts a pipeline of different materials. Freezing tube 4 uses Ф108×8mm low temperature resistant plastic pipe, temperature measurement tube uses Ф89×5mm low temperature resistant plastic pipe, liquid supply pipe and system connection pipe uses Ф32×3.0mm R304 low temperature resistant plastic pipe, plastic material can be PVC, PPR, ABS , PE and other plastic materials. In this embodiment, there is no need to remove the freezing tube 4 in step (4) of step 3. The steps of removing the freezing pipe 4 are reduced, the construction steps are reduced, and the efficiency is improved.

Embodiment 3

[0082] The difference between this embodiment and Embodiment 1 is that the shape of the liquid nitrogen frozen soil wall 2 does not adopt an upright flat wall but a curved frozen soil wall. In step 1, the freezing pipe 4 is arranged along a curve. The span of the curved frozen soil wall is small, and the rigidity of the end of the liquid nitrogen frozen soil wall 2 and the overall stability of the liquid nitrogen frozen soil wall 2 must be ensured. The frozen column pile 7 needs to bear the thrust transmitted by the curved frozen soil wall and within the range of the pile The pressure of the earth. The tension side of the liquid nitrogen frozen soil wall 2 is also provided with steel bars, glass fiber bars or bamboo bars as tensile materials. This can meet the needs of more shapes of foundation pits 5.

[0083] Attention should be paid to the use of this composite supporting structure during excavation in foundation pit 5:

[0084] (1) In order to ensure that there is absolutely ...

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Abstract

The invention discloses a piled anchor and liquid nitrogen frozen soil wall combined support implementation method and a supporting structure manufactured through the method. The implementation methodcomprises the following steps that 1, a drainage system is set; 2, slope protection piles are evenly arranged along the edge of a foundation trench, wherein the slope protection piles are long spiraldrilled cast-in-place piles; 3, an anchor rod is obliquely driven into a stratum, penetrates the slope protection piles and is anchored through an opening locking beam after being tensioned; and 4, aliquid nitrogen frozen soil wall is arranged in foundation soil, and the liquid nitrogen frozen soil wall and the anchor rod are anchored together through the freezing function of the liquid nitrogenfrozen soil wall. The supporting structure has the beneficial effects that the water sealing performance is good, the supporting structure can adapt to various complex environments and geological conditions, steel and concrete are saved, and safety and environmental friendliness are achieved; and the freezing speed is high, and the freezing strength is high.

Description

Technical field [0001] The invention relates to the field of building construction, in particular to a method for implementing composite support of pile anchors and liquid nitrogen frozen soil walls and a support structure thereof. Background technique [0002] At present, the pile-anchor supporting structure is a pull-anchored structure, which is suitable for supporting deep foundation pits with various soil qualities such as sandy soil and cohesive soil, and is widely used in urban underground engineering. The pile-anchor supporting structure is mainly composed of a row pile maintenance system, an anchor rod anchor system and a water retaining system. In the design process of the foundation pit pile-anchor supporting plan, the depth and stiffness of the pile, the supporting interval, the anchor rod form, etc. must be selected reasonably in order to achieve the best matching of the plan in terms of economy, safety and construction technology. Deep foundation pits are difficult ...

Claims

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Application Information

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IPC IPC(8): E02D19/06E02D19/08E02D19/10E02D17/04E02D19/14E02D19/18E02D5/18
CPCE02D5/18E02D17/04E02D19/06E02D19/08E02D19/10E02D19/14E02D19/18E02D2250/0023
Inventor 王海霖
Owner 王海霖
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