Device for secondary grouting by utilizing shield synchronous grouting equipment

Abstract

The invention discloses a device for secondary grouting by utilizing shield synchronous grouting equipment. Regarding to shield advancing, especially for a soft soil stratum and a section with the upper portion crossing a construction building, reducing of the stratum sedimentation rate, controlling over sedimentation data and guaranteeing of ground surface construction safety are the key and difficult point content which directly decides the safety of production and the input cost. The device comprises a first ball valve, a motor, a stirring tank, a second ball valve, a centrifugal pump, a pressure gauge, a shield machine grout storage tank, a first grouting pump, a second grouting pump and a third ball valve. Process analyzing is conducted from the scientific angle and by adopting the synchronous grouting method for soft soil stratum advancing, the improved synchronous grouting equipment is utilized to control the quality of the grout in the synchronous grouting process and can be directly used as the secondary grouting equipment. The synchronous grouting effect is improved, the secondary grouting efficiency is guaranteed, meanwhile, the stratum sedimentation rate is decreased, and the potential safety hazard risk and the outlay cost of the secondary grouting equipment are reduced.

Description

technical field [0001] The invention relates to a device for performing secondary grouting by shield tunneling synchronous grouting equipment, and belongs to the technical field of shield tunneling. Background technique [0002] Tunnel deformation during shield construction is a complex phenomenon interwoven with many factors such as soil quality, groundwater, tunnel section, buried depth, and construction technology. Taking contract section 13 of Tianjin Metro Line 6 as an example, since the diameter of the cutter head of the shield machine is 6440mm, and the outer diameter of the segment is 6150mm, when the segment is assembled and the shield tail is removed, the gap between the segment and the soil An annular gap is formed, and if the gap is not filled in time, it may cause deformation of the ground, resulting in the subsidence of the ground surface or the subsidence of buildings. Therefore, synchronous grouting fills this gap, and timely and effective grout injection in...

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Problems solved by technology

[0006] 1. Since the secondary grouting is the reinforcement grouting caused by the poor effect of synchronous grouting, there is a great potential safety hazard in the tunnel before the secondary grouting, which affects the timeliness of the secondary grouting The requirements are very high, but the traditional method of secondary grouting can only be grouted after the segment that needs secondary grouting is dragged out of the shield machine trolley, which cannot meet the timeliness requirements and requires a lot of manpower and material resources to install equipment and handling materials;

[0007] 2. The traditional secondary grouting method can also choose to perform reinforcing grouting as soon as the feedback information of the surface settlement monitoring is obtained, but at this time, the grout truck performing the secondary grouting will inevitably be blocked in the center of the tunnel and stagnate normally Advancement, which has a great influence on the construction progress

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