Inner drilling pipe inserting compaction grouting reinforcement method based on pipe gallery bottom plate cavity

Abstract

The invention discloses an inner drilling pipe inserting compaction grouting reinforcement method based on a pipe gallery bottom plate cavity. The method comprises the steps that a grouting hole point position is positioned on a pipe gallery bottom plate and identified; a steel plate is placed at the identified point position and fixed through an expansion bolt, a hole is formed in the center of the steel plate, and the hole diameter is not smaller than that of a grouting hole; the pipe gallery bottom plate is drilled downwards in the center hole of the steel plate to form the grouting hole, and the hole is formed to the bottom of a bottom plate cushion layer; a grouting pipe is inserted into the formed grouting hole, and gaps around the grouting pipe are compacted; high-pressure grouting is conducted in the grouting pipe, grouting slurry is pressed into a soil layer below the pipe gallery bottom plate, and the soil layer is compacted; and when the slurry in the grouting hole is solidified and has no water leakage condition, the grouting pipe is cut off along an upper opening of the steel plate, and the grouting hole is sealed through welding of a sealing plate. The problem of the pipe gallery bottom plate cavity is solved; and the structural quality hidden danger of a comprehensive pipe gallery is eliminated, the bottom plate cavity defect is overcome in a grouting reinforcement manner, and the phenomena of water seepage and crack structure damage of the comprehensive pipe gallery in the later period are prevented.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a method for strengthening by compaction and grouting of internal borehole insertion pipes based on the cavity in the bottom plate of a pipe gallery. Background technique [0002] With the vigorous development of municipal infrastructure construction, my country's comprehensive pipe gallery construction projects have sprung up like mushrooms; however, for the construction of underground space structure comprehensive pipe gallery, the hollow floor of the pipe gallery is a common problem, especially for soft ground And some impact mud pond geology near the sea, the impact is more significant; in addition, during the construction of the pipe gallery, the construction of the rainy season and the intermittence of related operations will aggravate the enlargement of the hollow phenomenon in the bottom plate of the pipe gallery. The reason for the formation of the cavity in...

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Problems solved by technology

[0005] In order to overcome the defects existing in the prior art, the present invention provides a method for strengthening the internal drilling, inserting pipe, compaction and grouting based on the hollow of the bottom plate of the pipe gallery, so as to solve the problem of the hollow of the bottom plate of the pipe gallery; , in order to make up for the cavity defects of the bottom plate through grouting reinforcement, and prevent water seepage and crack structure damage in the later stage of the comprehensive pipe gallery

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