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Method for performing deep foundation pit waterproof curtain construction by adopting high-pressure jet grouting pile machine

A technology of high-pressure rotary jetting pile machine and water-stop curtain, which is applied in the direction of foundation structure engineering, sheet pile wall, construction, etc. , the increase of construction costs and other problems, to achieve the effect of optimizing construction technical parameters, shortening construction period and improving construction quality

Active Publication Date: 2015-05-20
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the geological conditions are complicated, especially when a large number of boulders are mixed in the pebble layer, it is very difficult to form holes when passing through the pebble layer, and the construction speed is slow, which will increase the construction period of the deep foundation pit water-stop curtain, thereby increasing the construction site personnel, Income from materials, machinery and materials leads to an increase in construction costs

Method used

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  • Method for performing deep foundation pit waterproof curtain construction by adopting high-pressure jet grouting pile machine
  • Method for performing deep foundation pit waterproof curtain construction by adopting high-pressure jet grouting pile machine

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Experimental program
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Effect test

Embodiment 1

[0037] Use the following methods to construct the water-stop curtain for the above-mentioned deep foundation pit:

[0038] (1) Modification of rotary grouting pile machine

[0039] The CFG pile driver is refitted into a high-pressure rotary grouting pile driver. The modification method is to install the grouting pipe and the gas injection pipe inside the drill pipe of the CFG pile driver. The specific installation method is to remove the drill pipe of the CFG pile driver in sections; The tops of the grouting pipe and the air injection pipe are respectively connected with the high-pressure mud pump and the air compressor, and then the grouting pipe and the air injection pipe are passed through each section of the drill pipe in turn, and the grouting pipe and the air injection pipe are passed through each section of the drill pipe at the same time. The gas injection pipe is fixed and welded at the end of each section of drill pipe with steel hoops. Using the above method, the d...

Embodiment 2

[0053] Use the following methods to construct the water-stop curtain for the above-mentioned deep foundation pit:

[0054] (1) Modification of rotary grouting pile machine

[0055] The CFG pile driver is refitted into a high-pressure rotary grouting pile driver. The modification method is to install the grouting pipe and the gas injection pipe inside the drill pipe of the CFG pile driver. The specific installation method is to remove the drill pipe of the CFG pile driver in sections; The tops of the grouting pipe and the air injection pipe are respectively connected with the high-pressure mud pump and the air compressor, and then the grouting pipe and the air injection pipe are passed through each section of the drill pipe in turn, and the grouting pipe and the air injection pipe are passed through each section of the drill pipe at the same time. The gas injection pipe is fixed and welded at the end of each section of drill pipe with steel hoops. Using the above method, the d...

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Abstract

The invention discloses a method for performing deep foundation pit waterproof curtain construction by adopting a high-pressure jet grouting pile machine. According to the method and for sludge, clayey soil, loess, sandy soil, artificial filling, a pebble bed, a mud rock layer and other geological layers large in pore-forming difficulty, a grouting pipe and a gas injection pipe are installed inside a CFG pile machine drill rod, a drill bit of a CFG pile machine is refit into a down-hole hammer drill bit, a construction technology that gunite pile forming is directly performed after pore forming is adopted, and constructive technical parameters are optimized, so that pore-forming quality is improved, a construction period is shortened, and construction cost is reduced.

Description

technical field [0001] The invention belongs to the field of construction of water-stop curtains for deep foundation pits, in particular to a method for constructing water-stop curtains for deep foundation pits by using a high-pressure rotary grouting pile machine. Background technique [0002] The deep foundation pit water-stop curtain uses reinforced concrete row piles as the supporting structure, uses high-pressure rotary jet grouting to consolidate the soil between the row piles, and integrates with the concrete row piles to form an airtight water interception barrier. At present, in the construction method of the traditional deep foundation pit water-stop curtain, the rotary grouting pile machine is used for construction, and the hole needs to be introduced first, and then the pile is formed. Under the high pressure of the pump, the cement slurry with a certain water-cement ratio is pumped to the drill bit through the high-pressure pipe, so that the injected high-pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/18E02D5/46
CPCE02D5/18E02D5/46
Inventor 谢卜均柳树沈世强王辉丁建华
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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