Ground reinforcement grouting device and construction method

Abstract

The invention discloses a ground reinforcing grouting device and a construction method. The ground reinforcing grouting device comprises an inner-layer grouting tube, an outer-layer grouting tube, a rubber expansion rubber plug and a movable jacking head, wherein the outer-layer grouting tube movably sleeves the inner-layer grouting tube, and the outer diameter of the outer-layer grouting tube isless than the inner diameter of a floral tube; the rubber expansion rubber plug sleeves the lower end of the inner-layer grouting tube in a relatively fixed mode, the outer diameter of the rubber expansion rubber plug in a normal state is less than the inner diameter of the floral tube, the rubber expansion rubber plug is compressed between the floral tube and the inner-layer grouting tube after expanding due to being pressed, and the bottom of the outer-layer grouting tube is arranged at the top of the rubber expansion rubber plug in a pressing mode; and the movable jacking head is connectedto the inner-layer grouting tube in a height-adjustable mode, the bottom of the movable jacking head is arranged at the top of the outer-layer grouting tube in a pressing mode, and when the movable jacking rod moves downwards, the outer-layer grouting tube applies downward pressure to the rubber expansion rubber plug, so that the rubber expansion rubber plug is expanded due to being pressed. The slowness and difficulty of welding for cover sealing when the floral tube is sealed in existing grouting reinforcing construction can be overcome, the subsequent grouting treatment process can be further omitted, and the engineering progress of ground reinforcing grouting construction is accelerated.

Description

technical field [0001] The invention relates to the technical field of ground reinforcement construction, in particular to a ground reinforcement grouting device and a construction method. Background technique [0002] see Figure 1~3 , The ground reinforcement grouting joint construction generally carries out the hole location stakeout on the ground according to the design shape, size and position, then the drilling rig starts drilling, installs the steel flower tube 21 in the hole, then stabilizes the "grouting device", and welds the steel flower tube 21 nozzle The grouting pipe 23 with the "grout stop valve 22" is welded between the grouting pipe 23 and the tempered pipe 21 with a "capping 24". After the grouting pressure reaches the design requirement, then close the grout stop valve 22, and when the grout reaches the design strength, cut off the part above the base layer 20, and complete the construction of the ground reinforcement grouting node. [0003] On the one ha...

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Problems solved by technology

[0005] In view of the above existing problems, the present invention aims to provide a ground reinforcement grouting device and construction method, which can overcome the slowness and difficulty of welding "sealing" when closing flower tubes in the existing grouting reinforcement construction, and at the same time, can also reduce the grouting. The follow-up treatment process of the grout greatly speeds up the progress of the ground reinforcement grouting construction

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