Pipe jacking construction method under sandy gravel geological conditions

Abstract

The invention discloses a pipe jacking construction method under sandy gravel geological conditions. The pipe jacking construction method comprises the following steps that the position of a working pit and the center position of the pit are determined, the excavation depth of each layer is controlled, and concrete is poured in time; earth excavation, form manufacturing, steel bar engineering, form installation and concrete engineering are sequentially carried out; pipeline jacking comprises processes of earth cutting, jacking, measuring and deviation rectifying, a jack is used for extending apickaxe to push a jacking pipe forwards under the condition that the back retreats from the ground, and jacking is started from the position, located on the guide rail, of the pipe joint until the pipe jacking section is completed; when one-time jacking cannot be carried out, the pipe jacking section is divided into two sections, and sectional jacking is carried out by adopting an intermediate jacking station relay jacking method; shear wedges are arranged in an intermediate jacking station; and backfilling is carried out. The method solves the problem of jacking force of the sandy gravel section jacking pipe.

Description

technical field [0001] The invention relates to the field of pipe jacking construction of underground water supply and drainage pipelines, in particular to a pipe jacking construction method under sand and pebble geological conditions. Background technique [0002] The pipe jacking construction technology of underground water supply and drainage pipes of municipal infrastructure has its unique advantages when passing through urban buildings, highways, deep buried and other difficult and complex construction conditions. The pipe jacking construction technology is especially suitable for the non-excavation burial of large and medium-sized pipes, and has comprehensive functions of economy, safety, environmental protection and high efficiency. [0003] Sand and pebble strata are often encountered during pipe jacking construction. Jacking construction in this stratum is far more difficult than in clay, silt and general sandy soil strata. During the jacking process, the deviation ...

AI Technical Summary

Problems solved by technology

[0003] Sand and pebble strata are often encountered during pipe jacking construction. The jacking construction in this stratum is far more difficult than in clay, silt and general sandy soil strata. During the jacking process, the deviation increases and the jacking force increases. , it is difficult to correct the deviation, and even serious pulping phenomenon occurs

Images