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| Prediction of ground settlement caused by shield construction in soft rock ground |
| WANG Haitao1，SU Peng2，SUN Haoyu1，QI Kelu3，SHAO Junhui3 |
| (1. School of Civil Engineering，Dalian Jiaotong University，Dalian，Liaoning 116028，China；2. College of Architecture and Technology，Liuzhou Railway Vocational Technical College，Liuzhou，Guangxi 545000，China；3. The Second Engineering Co.，Ltd. of China Railway Seventh Group，Shenyang，Liaoning 110000，China) |
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Abstract Based on the unified soil movement model，the influence of the physical and mechanical parameters of rock materials on the ground disturbance caused by shield construction was considered. With the Verriujt calculation formula modified，the calculation method for predicting the ground settlement caused by shield construction in soft rock area was established. Meanwhile，the indoor model test was carried out based on the similarity theory. The results showed that the settlement value obtained by the modified Verriujt formula was in good agreement with the experimental value. In regard to the settlement curves obtained from Verruijt calculation formula and model test，the curvatures of settlement form were similar，but the goodness of fit become worse as ground depth was closer to the surface. The maximum settlement value of settlement trough obtained by the unified soil movement model was larger than that obtained by experimental value. The maximum settlement caused by shield construction in soft rock ground was above the tunnel and decreased nonlinearly along horizontal direction. When the overlying ground were different，the modified Verriujt formula was still of good applicable. With the analysis of the example，the calculation method in this paper was proved to be reliable for predicting the ground settlement caused by shield construction in practical engineering.
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2020, Vol. 39 
