Support row pile construction method for closing and water stop of deep foundation pits

Abstract

The invention innovatively provides a support row pile construction method for closing and water stop of deep foundation pits. The support row pile construction method is characterized in that positioning and paying off are performed at a support pile site according to designed positions so as to make pile position marks; then a row pile guide wall is constructed; I-sequence pile hole construction and pouring are performed; then drilling construction is performed at II-sequence pile hole positions between every two adjacent I-sequence pile holes; when II-sequence pile hole construction is performed, a drilling component of which the outer side is provided with a wire brush is adopted, and concrete is used for pouring; and then grouting pipes on two sides of I-sequence pile steel reinforcement cages are grouted, so that clearances among the adjacent piles are sealed. The support row pile construction method is applicable to working conditions of foundation pit support row piles that the level of underground water is higher than an excavation surface; the adjacent piles are lap-jointed, and water stop and soil retaining support are performed by utilizing the own concrete of pile bodies; grouting closing is performed among the piles by adopting a grouting technique, so that the clearances among the piles are sealed closely, and the water stop effect is ensured; a water stop curtain does not need to be arranged separately, so that construction cost is lowered; the construction period is obviously shortened; and the water stop effect of the foundation pit support row piles is improved.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a construction method for supporting and arranging piles for sealing and water-stopping deep foundation pits. Background technique [0002] Traditional deep foundation pit support side walls generally adopt enclosure structures such as row piles plus water-stop curtains, occlusal piles or underground diaphragm walls. There are many problems in the traditional pile-row and water-stop curtain enclosure structure. For example, the water-stop curtain structure increases the project area, the construction cost is high, and there are defects such as occupying the construction period and cross-construction. The construction of the occlusal pile and the underground diaphragm wall structure requires the investment of multiple large-scale pile machinery, and the process control is difficult, and the construction complexity is relatively high, which has a great impact on th...

AI Technical Summary

Problems solved by technology

There are many problems in the traditional pile row and water-stop curtain enclosure structure. For example, the water-stop curtain structure increases the project area, the construction cost is high, and there are defects such as occupying the construction period and cross-construction

The construction of occlusal piles and underground diaphragm wall structures requires the investment of multiple large-scale pile machinery, and the process control is difficult, and the construction complexity is relatively high, which has a great impact on the project cost

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