Steel sheet pile construction method

Abstract

The invention relates to the technical field of foundation pit supporting engineering, and discloses a steel sheet pile construction method. The method comprises the following steps of 1, marking theposition of each pile position on the construction ground; 2, moving a rotary drilling rig to the position of the corresponding pile position, performing rotary hole drilling, and after a hole is drilled to the preset hole guiding depth, reversely rotating and upwards lifting a drill bit of the rotary drilling rig to the construction ground so as to form a hole guiding position, wherein the drillbit arranged on the rotary drilling rib is an auger bit; and 3, moving a static pile press machine to the position of the hole guiding position, and aligning a steel sheet pile with the hole guiding position through the static pile press machine to perform piling embedding. The non-borrow hole guiding is realized in a mode of rotary drilling and reversely rotating and upwards lifting in the pile position; on one hand, the friction between a compact soil layer and the steel sheet pile is reduced; on the other hand, the pile hole refilling operation after hole guiding pile insertion is avoided;the piling efficiency of the steel sheet pile is improved; and the embedding depth of the steel sheet pile can also be ensured.

Description

technical field [0001] The invention relates to the technical field of foundation pit support engineering, in particular to a steel sheet pile construction method. Background technique [0002] Classified according to different soil characteristics, the third type of soil is defined as hard soil, the concept of which is: medium-dense cohesive soil or loess, moist soil containing gravel, pebbles or building material debris. [0003] At present, during the construction of the foundation pit engineering site of the underground comprehensive utility gallery, most of them will encounter solid soil layers, and their geological lithology includes artificial filling layers (average layer thickness about 3m), silty clay (average layer thickness about 5m), sand Layer (average layer thickness about 4m), calcareous limestone, limestone (average layer thickness about 2.5m). Among them, after the steel sheet pile passes through the artificial filling layer with a thickness of about 3m on...

AI Technical Summary

Problems solved by technology

Among them, after the steel sheet pile passes through the artificial filling layer with a thickness of about 3m on the surface, it enters the dense clay, coarse sand and partially weathered mudstone layer. layer, that is, it is difficult to embed in the hard soil layer, and it is necessary to continuously disturb the soil and reduce the density of the soil, which not only easily leads to damage to the steel sheet pile, but also cannot meet the embedding depth, and the construction is difficult and inefficient.

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