A monitoring and control method for pipe jacking construction

Abstract

The invention discloses a monitoring and control method for pipe jacking construction. Including: set the axis datum point A and point B according to the pipe jacking design requirements, set the axis direction control point D at the starting hole in the foundation pit, set the elevation control point C on the foundation of the excavation guide rail, and set the target target on the tunnel face; Lead the axis reference point to the 0 point of the laser level on the base of the working well; aim the vertical line emitted by the laser level at point D and the target to check the axis and control the axis direction; aim at point C through the vertical line emitted by the laser level The elevation is used as the backsight point to check with the target, and the elevation is controlled; according to the deviation data on the measurement light target, the pipe jacking excavation is corrected. The invention adopts the laser level combined with the hanging wire method, and uses the centering air bubble of the laser level to center the center of the hanging wire hammer as a reference point, and the cross ray of the level is aimed at the axis point of the front section, and the axis and elevation are checked by projecting the ray on the target on the face of the tunnel. In order to achieve the purpose of correction.

Description

technical field [0001] The invention belongs to the technical field of municipal engineering construction, is particularly suitable for measurement and deviation correction control technology in pipe jacking construction in sand and gravel strata, and particularly relates to a pipe jacking construction monitoring and control method. Background technique [0002] In construction, especially in underground construction, it is often necessary to carry out machine pit or tunnel construction in sand and gravel formations. The geological characteristics of the sand-gravel stratum have large particle size in some sections, which requires artificial pipe jacking construction. In pipe jacking construction, elevation and axis control are the most difficult points. In particular, the sand and gravel stratum has the characteristics of easy deviation and difficult deviation correction. The quality control of the pipeline axis and elevation directly affects whether the line can be connec...

AI Technical Summary

Problems solved by technology

The invention mainly solves the problems of artificial pipe jacking construction elevation and axis monitoring and control in sand and gravel strata

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