Analysis and prediction on the structure deformation of cross river shield tunnel

doi:10.13474/j.cnki.11-2246.2022.0260

Abstract

Abstract: In this paper, the correlation between structural deformation and water level of a shield tunnel is studied by analyzing the converging deformation and settlement data of multi-phase horizontal diameter of a shield tunnel in flood season obtained by 3D laser scanning technology. Discuss convergence deformation of shield tunnel under different water conditions and the trend of roadbed settlement, through the comparison analysis of monitoring data of flood season it is concluded that higher water conditions will cause tunnel horizontal diameter increase convergence deformation and subsidence, water level declines, horizontal diameter convergence deformation showed a trend of regression, and horizontal diameter convergence and sedimentation of shield tunnel reinforcement measures are put forward. Finally, in order to predict the convergence changes of tunnel horizontal diameter, the data of tunnel segment horizontal diameter in the past period were collected, and the gray algorithm program is run by python to predict the horizontal diameter of tunnel segment in the future, realizing the accurate prediction when the convergence accuracy of shield tunnel horizontal diameter is 1 mm.

Key words: river-crossing shield tunnel, horizontal diameter, high water level, structure safety, grey prediction algorithm

CLC Number:

P258

LI Qiangqiang, JIANG Weiling, TANG Chao, XU Hao. Analysis and prediction on the structure deformation of cross river shield tunnel[J]. Bulletin of Surveying and Mapping, 2022, 0(9): 34-38.

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