Defect Treatment of High-speed Rail Transit Engineering


Focusing on high-speed rail track bed settlement and subgrade damage, we have developed epoxy mortar and bend plate glue for rapid repair systems to improve repair efficiency and structural durability, supporting the stable operation of rail transit facilities.

Emergency repair of water leakage during shield tunneling entry and exit at the subway terminal shaft

For shield/pipe jacking tunnels, in addition to the spiral machine gushing and tail leakage during the normal excavation stage, the main risk points are the shield entry and exit stages; if a large amount of water and soil is lost, especially a large amount of soil loss at the bottom of the tunnel, it is very dangerous.

Subway tunnel segment leakage control

In the tunnel sections of rail transit, the joints of segmental linings, small cracks in the segments themselves, and manholes are affected by long-term vibration from metro trains and uneven settlement of strata, leading to water leakage, and even sand gushing from segmental joints, affecting the safety of the metro and tunnel. Such defects are common in metro maintenance.

Leakage control of excavation pits in underground projects of rail transit stations

In urban rail transit engineering, station and turning yard projects often involve excavation work. Due to objective factors related to urban space, existing buildings often surround the excavation site. During the excavation of underground engineering pits, slightly pressurized water may seep outward along the joints of the diaphragm walls, forming leakage channels in the weak soil areas below the working shaft, resulting in large-scale, high-velocity concentrated leakage that poses a significant threat to the safety of surrounding buildings.

Governance of large deformation diseases in segmented structure

An integrated tunnel safety management system covering "design, construction, and operation and maintenance" needs to be established; operation and maintenance should adhere to the maintenance concept of "inspection, evaluation, repair, control/rescue".
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