Construction method for pipe jacking with sand layers

Abstract

The invention relates to the technical field of pipe jacking, in particular to a construction method for the pipe jacking with sand layers. The construction method comprises the following steps that step one, according to the scheme for arranging holes, a grouting opening is formed by drilling of a drilling machine; step two, a phosphoric acid solution and glassy water are poured into the groutingopening synchronously; step three, after the phosphoric acid solution and the glassy water condense, the glassy water and cement paste are poured into the grouting opening synchronously; and step four, after the glassy water and the cement paste condense, pipelines are placed and the pipe jacking operation is carried out. Before the pipe jacking operation is carried out, two kinds of liquid are poured into the grouting opening before and after, the phosphoric acid solution and the glassy water of the step two condense by mixing, the glassy water and the cement paste of the step three condenseby mixing, and the double actions of the two play a good role in the consolidation of groundwater and quicksand and play a good role in reducing the sand layer disturbance during the subsequent pipejacking operation, and can effectively prevent settlement of surrounding road surface and buildings. Meanwhile, later pipe jacking operation is further facilitated, the construction efficiency is improved, and the gushing mud is not prone to appearing.

Description

technical field [0001] The invention relates to the technical field of pipe jacking, in particular to a construction method for pipe jacking with a sandy layer. Background technique [0002] With the rapid development of my country's economy, the existing sewage pipelines in many cities can no longer meet the needs of sewage discharge, and most of the sewage pipelines need to be rebuilt or expanded. [0003] During the construction of sewage pipelines in cities, due to the limitation of geographical environment, most of them are close to houses or pass through existing roads, and do not have the conditions for open access. At present, most of them are designed for pipe jacking construction. [0004] Pipe jacking construction is divided into manual pipe jacking and mechanical pipe jacking. Due to the high price of mechanical pipe jacking equipment, in most cases people use manual pipe jacking for construction, and manual pipe jacking construction can effectively protect exist...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a construction method for pipe jacking with a sand layer to solve the technical problems existing in the prior art that when pipe jacking operations are carried out in the sand layer area of ​​​​the water-rich zone, it is easy to cause road surface collapse and house settlement

Images