Vertical radial grouting settlement control method for rigid sleeve valve pipe bundles

Abstract

The invention discloses a vertical radial grouting settlement control method for rigid sleeve valve pipe bundles. The vertical radial grouting settlement control method comprises the following steps that grout overflow holes are marked and drilled in at least three steel pipes with sequentially increased lengths, and a rigid sleeve valve pipe bundle is formed by means of combining and fixing; the positions of a plurality of grouting control settlement holes are calibrated in the arch part of a primary support, and drilling is performed vertically to a set depth; a grouting pipe and an exhaust pipe are bound on the rigid sleeve valve pipe bundle and sent into a grouting control settlement hole, the hole is sealed, and a sleeve shell material is poured; settlement observation points and convergence observation points are installed at set positions, and settlement data of settlement mileage are monitored and controlled in real time; when the settlement data reach a critical settlement value, grouting is conducted according to the length of steel pipes in the rigid sleeve valve pipe bundles from short to long, one rigid sleeve valve pipe is used each time, other rigid sleeve valve pipes are used for standby application, the settlement data are monitored in real time in the grouting process, and grouting is stopped when the monitored settlement data reach the requirement, until controlling of all stratums of the settlement mileage is completed.

Description

technical field [0001] The invention relates to the technical field of grouting reinforcement control settlement in underground engineering, in particular to a method for grouting control settlement. Background technique [0002] With the development of underground projects such as tunnels, subways, and pipe galleries, it is becoming more and more difficult to select routes. It often happens that after the excavation of underground projects, the surrounding strata are deformed, resulting in settlement and deformation of the surface or other nearby buildings. As a result, more and more projects with high risks and high requirements for settlement control are emerging. At present, the methods of controlling settlement are basically pre-control and in-process control, grouting and pre-reinforcement of pre-excavated strata, and then rapid excavation support, backfilling and grouting, etc., but these methods still cannot avoid settlement deformation occurrence, and the settlemen...

AI Technical Summary

Problems solved by technology

However, this method of directional grouting to control the settlement of the bridge foundation still has the following shortcomings or deficiencies: (1), this method cannot realize post-event control of settlement; (2), this method cannot control the settlement deformation of the formation

But this invention still can't realize the effect of subsidence control afterwards

Images