Patent ID: 11927098
Assignee: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A method for controlling stratum deformation in a shield construction process, comprising:
monitoring settlement characteristic parameters in a shield construction process;
predicting a settlement proportion according to the settlement characteristic parameters, the settlement proportion being a ratio between a predicted settlement value and a corresponding settlement threshold; and
determining construction parameters in the shield construction process according to the settlement proportion;
wherein the stratum deformation process in the shield construction process is divided into five settlement stages, namely a pre-deformation stage, an excavation face deformation stage, a deformation stage in passing process, a shield tail rear deformation stage, and a post-deformation stage; and determining construction parameters in the shield construction process according to the settlement proportion comprises: determining the construction parameters corresponding to the settlement stages according to a settlement proportion of each settlement stage;
wherein determining the construction parameters corresponding to the settlement stages according to a settlement proportion of each settlement stage comprises: determining whether the settlement proportion of each settlement stage is within a corresponding predetermined range; and adjusting the construction parameters corresponding to target settlement stage when the settlement proportion of the target settlement stage is not within the corresponding predetermined range;
wherein the construction parameters corresponding to the pre-deformation stage and the excavation face deformation stage comprise a slurry pressure, the settlement proportion corresponding to the pre-deformation stage is a first settlement proportion, the settlement proportion corresponding to the excavation face deformation stage is a second settlement proportion, the predetermined ranges corresponding to the pre-deformation stage and the excavation face deformation stage are a first predetermined range, a minimum value of the first predetermined range is a first threshold, and a maximum value of the first predetermined range is a second threshold; and adjusting the construction parameters corresponding to target settlement stage when the settlement proportion of the target settlement stage is not within the corresponding predetermined range comprises: reducing the slurry pressure when the first settlement proportion and/or the second settlement proportion are smaller than the first threshold; and increasing the slurry pressure when the first settlement proportion and/or the second settlement proportion are greater than the second threshold.