Construction method and system for shield tunneling advanced detection in marine stratum

Abstract

The invention relates to a construction method and system for shield tunneling advanced detection in a marine stratum. The construction method comprises the steps that a seismic wave emitter is arranged on a cutterhead of a shield machine; a plurality of seismic wave receivers are arranged on the cutterhead; according to a seismic wave, a corresponding special coding sound transmission signal is formed, so that the seismic wave emitter emits a seismic wave signal to the front of the shield machine according to the special coding sound transmission signal. The seismic wave receivers receive the reflected seismic wave signal, record and analyze detection data so as to obtain geological conditions of the stratum in front of the shield machine. The seismic wave emitter installed on the cutterhead of the shield machine is used for emitting the seismic wave signal to the front of a chapelet face. The seismic wave emitter generates seismic elastic waves through the special coding sound transmission signal, the preparation procedure of drilling and blasting in TSP technology is avoided, the emission frequency of the seismic wave signal can be controlled, prediction accuracy of the geological condition can be improved, and control is simple, convenient and feasible.

Description

technical field [0001] The invention relates to the field of tunnel shielding, in particular to a construction method and system for advanced detection of shield tunneling in marine strata. Background technique [0002] In recent years, domestic urban rail transit has developed extremely rapidly. By 2015, my country will have 158 rail transit lines built and under construction, with a total mileage of more than 4,189 kilometers. The shield method construction technology has the characteristics of high degree of mechanized construction, high excavation efficiency, and small impact on the environment, and has been widely used in the construction of urban rail transit in my country. [0003] Modern tunnel construction projects increasingly encounter complex stratum problems. The existing shield construction method is suitable for construction in relatively simple soft soil stratum, soft rock stratum and sand stratum. During the tunnel construction process, the adverse geologic...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of the prior art, provide a construction method and system for advanced detection of shield tunneling in marine strata, and solve the problems of large deviation, high cost and The problem of time-consuming, and the complex preparation process of TSP technology and the need for several blasting vibrations to improve the accuracy

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