Construction method for following up and injecting thixotropic slurry outside box body in pipe roofing supporting and pushing construction

Abstract

The invention discloses a construction method for following up and injecting thixotropic slurry outside a box body in pipe roofing supporting and pushing construction, and belongs to the technical field of bridge and culvert construction. The method comprises the following steps: fixing a slurry injection pipe without holes outside a box body; preparing thixotropic slurry; mounting slurry ejection equipment; drilling an slurry injection hole in a soil immersion section of the slurry ejection pipe; jacking the box body; performing pressure injection on the thixotropic slurry; discharging soil of a culvert; suspending slurry injection; drilling the slurry injection hole in the soil immersion section of the slurry ejection pipe, continuously jacking the box body, and circulating the subsequent processes till the box body is jacked to a proper position; performing pressure injection on cement past to solidify the soil bodies on three sides of the box body. The method solves the problems that in the prior art, the quantity of slurry injection pipe connectors is large, a large quantity of conveying pipes are required, the construction technology is relatively complex, the construction period is relatively prolonged, and the construction cost is high.

Description

technical field [0001] The invention belongs to the technical field of bridge and culvert construction, and in particular relates to a construction method for follow-up injection of thixotropic mud outside a box during pipe-curtain support and pushing construction. Background technique [0002] The traditional jacking process needs to reserve a grouting pipe on the bottom plate for the grouting of the bottom plate. The thixotropic grouting must adopt the grouting construction technology of pre-embedding the grouting pipe on the main body of the bridge and culvert. The grouting equipment is connected internally for grouting. This grouting method has a large cross-interference with the jacking and excavation operation, especially in the case of a small net diameter of the culvert, and there is no work space; at the same time, after the grouting is completed, the pre-embedded The construction of waterproofing treatment for slurry pipes is difficult, especially for water conserv...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a construction method for follow-up injection of thixotropic mud outside the box in the construction of pipe curtain support and push construction, so as to solve the problem of many joints of grouting pipes in the prior art, the need for a large number of grouting pipes, and the construction process. Relatively complex, relatively long construction period and high construction cost

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