A box culvert jacking method with comprehensive grouting, pressure keeping and pipe curtain support

Abstract

A box culvert pushing construction method integrating comprehensive grouting, pressure maintaining and pipe roof support is characterized in that a box culvert is pushed under the pipe roof support on a culvert pushing construction working surface, and simultaneously, comprehensive grouting, lubrication, friction reduction and pressure maintaining measures are taken to control pavement sedimentation. The construction method comprises the steps of pushing the box culvert under the pipe roof support, performing the comprehensive grouting in places, forming a pressure maintaining lubrication film around a box culvert pushing body, and micro-controlling grouting under the pavement to reduce the pavement sedimentation. The method has the benefits that the pipe roof support, comprehensive grouting as well as pressure maintaining and lubrication measures are added in the construction method based on a common culvert pushing method; the prefabricated box culvert is pushed under the protection of a pipe roof; the whole construction process integrates underground water sealing, temporary tunnel face reinforcing and ground elevation micro-control measures; crossing construction can be accomplished under the condition that normal traffic of an expressway is ensured; land requisition and side rod construction expenses are not required to be increased; the risk and construction cost are low; the construction period is short; compared with the prior conventional culvert pushing technology, the method shows good superiority.

Description

technical field [0001] The present invention relates to the technical field of roof culvert construction under expressway pavement, and in particular to a box culvert jacking method of comprehensive grouting pressure maintaining and pipe curtain support, that is, steel pipe curtain + comprehensive grouting construction method, which is applied to underpassing expressway Top culvert construction and top culvert construction under other road surfaces. Background technique [0002] Top culvert construction is also called jacking culvert construction. The advantage of this construction method is that it has little impact on traffic on existing roads. [0003] At present, the methods commonly used in the prior art of roof culvert construction under the pavement include: [0004] 1. In the case of no pipe shed support, the disadvantage of directly jacking into the culvert without taking any measures (belonging to the known technology) is: the distance of the top culvert is limite...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art, aiming at the problems of large road surface settlement and difficult jacking in the middle and later stages in the process of jacking culverts, and to provide a steel pipe curtain support + pressure maintaining lubrication + comprehensive grouting in the process of jacking culverts construction method

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