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Method for controlling running sand in underground engineering and grouting system therefor

A grouting system and underground engineering technology, applied in infrastructure engineering, soil protection, sheet pile walls, etc., can solve problems such as polluting the environment and harming the health of construction workers, and achieve low engineering costs, saving money, human body and health. Environmentally sound effects

Inactive Publication Date: 2008-10-01
SHANGHAI HUAHAI SPECIAL ENVIRONMENTAL ENGCO
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Problems solved by technology

The refrigerant used for freezing will pollute the environment and harm the health of construction workers

Method used

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  • Method for controlling running sand in underground engineering and grouting system therefor

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Embodiment Construction

[0024] The method of the present invention and the grouting system that implements the method all pass through multiple small-scale tests and implementation, and the implementation of a certain underground project in Wenshao City, Zhejiang Province is selected here as an embodiment of the present invention:

[0025] Determine quicksand geology: Wensa City, Zhejiang Province is a coastal area, most of the land is formed by sedimentation, and the soil quality is mainly sandy soil. The partial area below the elevation of -4m in the coastal area is the quicksand layer. The project is located near the Oujiang River in Wensao City. According to the plan, the geological survey shows that the partial area of ​​the project is in the quicksand layer with an elevation of -6m.

[0026] Draw up the construction plan: draw a line on the upper part of the quicksand layer area. In this example, 3 rows of grouting outer pipes are arranged. The hole distance between the pipes is 500-600mm, the ...

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Abstract

The invention discloses a method for underground engineering control running sand and grouting system thereof. The method includes steps of determine running sand geology, redacting construction plan, providing construction equipment, grouting operational process, and acceptance check qualified measuring . The grouting system for implementing the method includes a boring machine, a slurry stirring implement, a mud injecting pump, a slurry carrier pipe, a motor, an exterior tube and a grouting inner pipe. The invention uses a multiple discharging solid boring tube setting up grouting method and a grouting system to change running sand into solid condition. The method has advantages of better safe reliability and being capable of crossing a running sand layer to realize open type construction. Compared with the prior technology, the method and apparatus are simple, the engineering investment is few, cost is low and the operations are convenient and harmless to human body and surroundings. Testified by experiments, the invention has practice property, and extremely obvious effect of controlling running sand. The invention gropes a novel road for underground engineering construction, and leads out a novel development direction.

Description

technical field [0001] The present invention relates to underground civil engineering technology, specifically the quicksand geology encountered in underground civil construction constructions such as subways, walkways, water supply and drainage projects, bridge piers, etc., a method for controlling the flow of quicksand adopted, and provides for implementing the method control system. Background technique [0002] Modern urban construction is constantly using underground space, and underground civil engineering is related to the soil quality of geological layers. Quicksand layer geology will bring great harm to underground civil construction, because there are a lot of fine silt and water in the quicksand layer. When excavating the quicksand area, under the action of the potential energy of the groundwater table, water and fine silt are violently surged toward the excavation direction. If the quicksand area is not controlled in advance, serious consequences will be caused...

Claims

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Application Information

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IPC IPC(8): E02D3/12E02D5/46E02D15/00
Inventor 金阳升郑春华蒋利江
Owner SHANGHAI HUAHAI SPECIAL ENVIRONMENTAL ENGCO
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