Application method of bag grouting pile in soft soil foundation of railway

Abstract

The invention discloses an application method of a bag grouting pile in a soft soil foundation of a railway. A grout mixing and storing system, a mud jacking pump and a grouting pipe applicable to high pressure are contained, wherein the grout mixing and storing system comprises a grout mixing barrel and a grout storing barrel, one end of the mud jacking pump is connected with the grout storing barrel, and the other end of the mud jacking pump is connected with the grouting pipe through a sprinkler recorder, and a geotextile bag is tied outside the grouting pipe. Cement grout is injected to form the pile under high pressure by use of the mud jacking pump and the grouting pipe, the swollen geotextile bag plays a role in compaction on peripheral soil mass through extrusion, a pile body obtained after the geotextile bag is hardened and pile space soil form a manual composite foundation, so that the stability and the bearing force of the foundation are greatly improved, defects that diffusion is easily caused during conventional grouting, the pile forming property is poor, the reinforcing range is not clear and the like are overcome, the flow direction of grout can be controllable instead of out of control, the strength of a reinforcing composite body is turned to be measurable instead of difficult to measure, engineering waste can be reduced, and grout loss and environmental pollution are avoided.

Description

technical field [0001] The invention relates to the technical field of railway construction, in particular to an application method of bagged grouting piles in soft ground of railways. Background technique [0002] In the face of many factors such as long railway construction lines, large geological changes, and difficult reinforcement and treatment of weak foundations, higher requirements are put forward for the rapid development of railways to adapt to poor foundations and the choice of foundation treatment methods. [0003] At present, there are many methods of foundation reinforcement at home and abroad, and new methods are also being developed, but all of them have little effect. The bearing capacity of soft foundation, foundation compressibility and foundation stability are still relatively serious problems. Contents of the invention [0004] (1) Solved technical problems [0005] Aiming at the deficiencies of the prior art, the present invention provides an applica...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an application method of bagged grouting piles in railway soft soil foundations, which solves the above-mentioned problems of how to improve the bearing capacity of weak foundations, reduce the compressibility of foundations, and ensure the stability of foundations.

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