Foundation pit supporting construction technology combining equal-thickness cement-soil diaphragm wall and tubular piles

Abstract

The invention relates to a foundation pit supporting construction technology combining an equal-thickness cement-soil diaphragm wall and tubular piles. The foundation pit supporting construction technology is characterized in that according to the technological process, a plurality of supporting structures are manufactured along the side boundary of a foundation pit and connected end to end to form a whole surrounding the foundation pit, wherein the specific construction technology of each supporting structure comprises the steps that a, after pile position surveying and setting out are carried out, drilling down is carried out, and cutting is carried out downwards till cutting is carried out at the preset depth; b, after cutting is carried out downwards at the preset depth, transverse cutting is started, and meanwhile grouting is carried out to form the equal-thickness cement-soil diaphragm wall; c, after transverse cutting is carried out for a certain distance, transverse cutting and grouting continue to be kept, and the prefabricated tubular piles are sequentially and vertically lowered into the diaphragm wall in the length direction of the diaphragm wall; and d, a top beam is poured to completely cover the prefabricated tubular piles and the diaphragm wall. The supporting structures with high integrality are formed, and construction speed is high.

Description

technical field [0001] The invention relates to the field of construction, in particular to a foundation pit supporting construction technology combining diaphragm walls and pipe piles under cement soil with equal thickness. Background technique [0002] With the development of urban construction, the market demand for foundation pit water interception and land saving of foundation pit support structure is becoming stronger and stronger. However, due to limited site conditions, most of the basement sidelines are very close to the red line of the site, so it is impossible to arrange more equipment for construction around the foundation pit, and it is impossible to construct thick water-stop curtain mixing piles outside the support structure. Moreover, the water-stop curtain mixing pile combined with cast-in-situ pile support system currently used in the mainstream has a long construction period, a large site occupation, high cost, difficult quality control and high cost. Co...

AI Technical Summary

Problems solved by technology

However, due to the limited site conditions, most of the basement sidelines are very close to the red line of the land, so it is impossible to arrange more equipment for construction around the foundation pit, and it is impossible to construct thick water-stop curtain mixing piles outside the support structure

Moreover, the water-stop curtain mixing pile combined with cast-in-situ pile support system currently used in the mainstream has a long construction period, takes up a lot of space, has high cost, difficult quality control and high cost

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