Construction Technology of Cluster Pendulum Spraying Cut-off Wall

Abstract

The invention discloses a construction technique of cluster pendulum spraying anti-seepage wall, which comprises four steps of drilling, grouting, refilling and sealing, and adopts a rotary device to drill holes. When drilling, a driving mechanism drives a drill rod while pressing down. Rotate while drilling continuously to complete the drilling; after the drill bit drills to the expected depth, perform high-pressure jet grouting to ensure that the indicators of the slurry meet the design requirements, spray the cement slurry from the high-pressure cement slurry nozzle to cut the formation, and start at the preset speed Lift the drill pipe to the preset elevation; then refill and seal the hole. The invention adopts a rotary drilling rig to drill holes, and adopts two sets (or more than two sets) of high-pressure slurry nozzles separated to solve the problem of uneven thickness of the traditional high-spray cut-off wall, forms a high-spray cut-off wall with approximately equal thickness, and improves the construction efficiency. efficiency and reduce construction costs.

Description

technical field [0001] The invention relates to the technical field of anti-seepage wall construction, in particular to a construction technology of cluster pendulum spray anti-seepage wall. Background technique [0002] The anti-seepage wall is the main project in the water conservancy project, and its project quality is very important. In recent years, various construction techniques have been used in the construction of anti-seepage walls. Common techniques mainly include hydraulic grab method, water jet wall method, high spray method, impact drilling method, deep mixing method, etc. Among them, the hydraulic grab method, the water jet wall method and the impact drilling method belong to the full replacement process, that is, the soil, sand and gravel in the original stratum must be replaced from the ground, and then the concrete material is recharged to form the wall; while the high spray method and the deep stirring method do not. All need to be replaced, in situ cutti...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a construction technique for the cluster pendulum jetting cut-off wall, using a rotary drilling rig to drill holes, adopting 2 sets (or multiple sets) of slurry nozzles separated in opposite directions, and the slurry gas channels are separated from each other on different axes. The measures solved the problems of uneven thickness of the anti-seepage wall and easy blockage of the air passage, and improved the construction quality and work efficiency of the anti-seepage wall

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