Foundation pit bottom horizontal freezing reinforcing structure and construction method

A technology for strengthening structures and construction methods, which is applied in basic structure engineering, soil protection, construction, etc. It can solve problems such as difficulty in guaranteeing reinforcement effect and quality, uneven distribution of soil strength, and uneven development speed, etc. It is easy to achieve construction effects Control, construction quality control is convenient, and the effect of strong construction practicability

Active Publication Date: 2019-08-02
王海霖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a horizontal freezing reinforcement structure and construction method at the bottom of the foundation pit, so as to solve the problem that in the prior art, during the reinforcement construction, the reinforcement part grows rapidly in a short period of time in the early stage and continues to develop slowly in the later stage, and the development speed is not fast. Both are difficult to control, and the reinforcement effect and quality of the soil at the bottom of the foundation pit are difficult to guarantee, and the strength of the soil after reinforcement is unevenly distributed.

Method used

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  • Foundation pit bottom horizontal freezing reinforcing structure and construction method
  • Foundation pit bottom horizontal freezing reinforcing structure and construction method
  • Foundation pit bottom horizontal freezing reinforcing structure and construction method

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Embodiment 1

[0033] Such as Figure 1-2 As shown, the present invention provides a horizontal freezing reinforcement structure at the bottom of a foundation pit, which is characterized in that it includes a foundation pit 3, an enclosure structure 6, a horizontal freezing pipe 1 and a freezing curtain 4, and the horizontal freezing pipe 1 is oriented horizontally Boreholes are drilled through the enclosure structure 6 and set horizontally at the bottom of the foundation pit 3. There are several horizontal freezing pipes 1 that are evenly arranged in the soil layer at the bottom of the foundation pit 3 along the horizontal direction. The horizontal freezing pipe 1 freezes the soil layer at the bottom of the foundation pit 3 to form the freezing curtain 4, and the foundation pit 3 is excavated after the formation of the freezing curtain 4 and uses the top of the freezing curtain 4 as the foundation pit 3 bottom.

[0034] The horizontal freezing pipe 1 is arranged parallel to the width direc...

Embodiment 2

[0208] The difference between this embodiment and embodiment 1 lies in the change of the freezing system. In this solution, the freezing system is a liquid nitrogen freezing system. The specific differences in structure and construction process are as follows:

[0209] The horizontal freezing pipe 1 is a liquid nitrogen freezing pipe, which is made of Ф108×8mm low-carbon stainless steel pipe, the temperature measuring pipe is made of Ф89×5mm stainless steel pipe, and the liquid supply pipe 2 and the system connecting pipeline are made of Ф32×3.0mm R304 stainless steel pipe. The above materials are all steel. But each pipeline also can adopt plastic materials such as PVC, PPR, ABS, PE, when selecting plastic material for use, does not need the sixth step to pull out freezing pipe at last.

[0210] The specific construction process of setting up the freezing system is to set the liquid nitrogen supply tank car at a position close to the liquid supply pipe 2, and the pipeline co...

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Abstract

The invention discloses a foundation pit bottom horizontal freezing reinforcing structure and a construction method. The reinforcing structure comprises a foundation pit, an enclosure structure, a horizontal freezing pipe and a freezing curtain. The horizontal freezing pipe penetrates through the enclosure structure in a horizontal directional drilling manner and is horizontally arranged at the bottom of the foundation pit; a plurality of horizontal freezing pipes are uniformly arranged in a soil layer at the bottom of the foundation pit along the horizontal direction, the horizontal freezingpipes freeze the soil layer at the bottom of the foundation pit to form the freezing curtain, and the foundation pit is excavated after the freezing curtain is formed and takes the top of the freezingcurtain as the bottom of the foundation pit. The construction method has the outstanding advantages of being high in construction practicability, convenient to control construction quality, good in reinforcing effect, particularly good in water stop effect, safe, reliable and the like, and the safety of deep soft soil engineering piles in the foundation pit in the excavation process can be guaranteed to the maximum extent.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a horizontal freezing reinforcement structure at the bottom of a foundation pit and a construction method. Background technique [0002] At present, the scale of foundation pits in my country's urban construction is getting larger and larger, and the excavation of earthwork is getting deeper and deeper, which has a greater impact on the stability of foundation pits and the safety of the surrounding environment, especially in foundation pit projects in soft soil areas. The mechanical indexes such as the internal friction angle and cohesion of the soil are very low, and the soft soil is mostly in the state of soft plastic or semi-fluid plastic. If the design of the foundation pit is improper, it is easy to cause excessive lateral displacement of the enclosure structure, settlement of the surrounding ground and damage to the bottom of the pit. Uplift, thereby affecting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/115E02D19/14
CPCE02D3/115E02D19/14
Inventor 胡俊王海霖
Owner 王海霖
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