A construction method for mud-water shield to reduce disturbance and pass through non-foundation residential areas

Abstract

The invention discloses a construction method for reducing the disturbance of a slurry shield passing through a foundation-free residential area. The construction method comprises the steps of performing house detection and evaluation; performing ground tracking grouting reinforcement on the seriously damaged house; doing pre-traversing preparation work; setting various parameters in the traversing process; and performing in-tunnel grouting reinforcement; and performing monitoring measurement control. According to the construction method, disturbance to a building when the slurry shield passesthrough the foundation-free residential area is reduced, normal construction of the slurry shield is guaranteed, facility safety of the foundation-free residential area is guaranteed, and the construction method has wide guiding significance for construction in the field.

Description

technical field [0001] The invention belongs to the technical field of tunnel shield construction, in particular to a construction method for muddy water shields to reduce disturbance and pass through areas without foundations. Background technique [0002] In the process of mud-water shield construction, it is often encountered that the shield tunnel passes through some residential areas with poor foundations or even no foundations that cannot be moved. The conventional shield tunneling mode will have the following problems: [0003] 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; [0004] 2. Corresponding reinforcement measures are not taken for seriously damaged houses on the ground surface, which increases the risk of crossing; [0005] 3. The shield machine has not made preparations before crossing, and it may cause shutdown due to personnel and equipm...

AI Technical Summary

Problems solved by technology

[0003] 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;

[0004] 2. Corresponding reinforcement measures are not taken for seriously damaged houses on the ground surface, which increases the risk of crossing;

[0005] 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;

[0006] 4. In the process of shield tunneling, the setting of mud-water pressure, mud parameters, and tunneling parameters is unreasonable, which makes the cutting of the tunneling surface by the cutter head and the erosion of the mud on the tunneling surface damage the stable structure of the soil and cause large unevenness on the ground surface. The subsidence caused cracks or even collapses in the houses without foundations, posing a great safety hazard, especially the large shield with a diameter of more than 10 meters increased the risk of crossing;

[0007] 5. 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;

[0008] 6. Insufficient monitoring and measurement of the ground room area leads to the inability to grasp its changes in time and increases the risk of crossing

[0009] Up to now, there have been no relevant reports on the construction method of mud-water shield to reduce disturbance and pass through non-foundational residential areas