Construction method for preventing settlement of shield construction crossing building

Abstract

The invention discloses a construction method for preventing settlement of a shield construction crossing building. The construction method comprises the following steps of step A, debugging a shieldmachine and mounting accessories; step B, preparing grouting slurry; step C, tunneling and grouting the shield machine; and step D, after grouting is finished, closing a valve. By the construction method, the shield machine can be prevented from being solidified forever, by changing the construction method, safety of tunnel construction is ensured, the phenomena of demolition, resident disturbanceand the like caused by ground reinforcement and the like are avoided, normal construction of the shield machine can also be ensured, and good social benefits and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of tunnel construction, and in particular relates to a construction method for preventing subsidence of buildings through shield construction. Background technique [0002] At present, domestic shield tunnel construction is the most widely used and relatively mature technology for rail transit. However, there are few linear designs involving overlapping and small-spacing tunnel construction, and when there are many nearby buildings and the buildings need to be protected and constructed, the ground grouting reinforcement process is mostly used. However, with the intensification of the urbanization process, more and more tunnels such as subways and municipal tunnels are concentrated in urban areas, and there are fewer and fewer projects that can meet the conditions for ground reinforcement. Or ground reinforcement is accompanied by demolition and disturbance of residents. [0003] Conventional shield tunneling mode wi...

AI Technical Summary

Problems solved by technology

[0004] 1. The damage and number of houses in the non-foundational housing area have not been ascertained in advance, and there may be great safety hazards in blind crossing;

[0005] 2. Corresponding reinforcement measures are not taken for seriously damaged houses on the ground surface, which increases the risk of crossing;

[0006] 3. The shield machine has not made preparations before crossing. During the crossing process, it may be shut down due to personnel and equipment problems, prolonging the crossing time and increasing the construction risk factor;

[0007] 4. The conventional synchronous grouting mode can only fill the gap between the back of the segment and the soil layer, which cannot avoid large surface settlement and cannot meet the requirements of non-foundation houses for surface settlement;

Images