Synchronous grouting device capable of controlling pipe piece to float upwards and using method of synchronous grouting equipment

Abstract

The invention discloses a synchronous grouting device capable of controlling a duct piece to float upwards. The device comprises a shield tunneling machine synchronous grouting system, a shield tunneling machine original grouting pipeline, a water glass configuration system, a water glass injection system and a bentonite injection system, and is characterized in that the water glass injection system is connected with the water glass configuration system; The bentonite injection system is connected with the water glass injection system, the shield tunneling machine synchronous grouting system is connected with the water glass injection system, and the shield tunneling machine original grouting pipeline is connected with the water glass injection system. The invention belongs to the technical field of shield construction, particularly relates to synchronous grouting equipment capable of controlling floating of duct pieces and a use method of the synchronous grouting equipment, and provides the synchronous grouting equipment capable of controlling the floating of the duct pieces to perform shield construction in a silty clay stratum, so that the floating amount of the duct pieces can be simply, quickly and effectively controlled, and the forming quality of an interval tunnel is ensured.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and specifically refers to a synchronous grouting equipment capable of controlling the floating of segments and a method for using the same. Background technique [0002] In the field of shield construction, synchronous grouting will be performed behind the wall of the segment during the construction process. The synchronous grouting grout of the interval shield generally adopts inert grout, and its main components are sand, fly ash, cement, bentonite and water. The slurry-like strength is very low and the initial setting time of the slurry is long, and the slurry is easily diluted before the initial setting. Therefore, the shield tunneling in this section is excavated in the silty clay layer with better self-stability, and the overlying soil will not settle in a short time, resulting in a certain gap after the segment breaks out of the shield, while the low-strength, non-initial setting...

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Problems solved by technology

The second is to generate shear stress on the end face of the segment, resulting in dislocation, cracking, damage and water leakage of the segment, and reducing the compressive strength and impermeability pressure of the segment structure

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