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

Abstract

The invention relates to a method for conducting deep foundation pit waterproof curtain construction through a high-pressure jet grouting pile machine, and relates to the technical field of deep foundation pit waterproof curtain construction. The construction method comprises the steps of construction preparation, surveying and setting out, drilling machine positioning and hole guiding, cast-in-situ bored pile construction, pre-hole-exploring construction, high-pressure jet grouting pile construction and slurry supplementing and checking. On the basis of existing high-pressure jet grouting piles and cast-in-situ bored piles, the situation that only the high-pressure jet grouting piles are adopted for foundation pit waterproof curtain construction in the existing construction process is improved into the situation that the cast-in-situ bored piles are adopted for construction in a soil layer with soft soil texture and small construction difficulty (the upper portion) in a construction area (foundation). High-pressure jet grouting piles are adopted for construction in a (lower) soil layer which is hard in soil texture and large in construction difficulty, so that the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical 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] At present, with the continuous development of construction technology, the types of water-stop curtains are gradually diversifying, such as high-pressure rotary grouting water-stop piles, cement-soil deep-drilled cast-in-place piles, long spiral water-stop piles, and three-axis mixing water-stop piles. , Rotary digging occlusal water-stop piles, underground diaphragm walls, etc. [0003] The high-pressure rotary grouting pile is to use the drilling rig to put the grouting pipe to the predetermined position of the soil layer or gravel layer, and through the injection device at the lower end of the drill pipe, the cement slurry is sprayed into the soil or gravel layer at a hi...

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Problems solved by technology

[0006] The above water-stop curtain construction method uses high-pressure rotary jetting pile machine for construction throughout the entire water-stop curtain construction process. The above-mentioned construction method is costly, so it is necessary to improve

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