Analysis of four-hole culvert settlement caused by underlying shield tunnel of intercity railway

doi:10.16265/j.cnki.issn1003-3033.2018.11.019

Abstract

Abstract: To solve the problem of excessive settlement caused by shield tunnel of intercity railway underlying existing structure in silt stratum, in the background of shield tunnel underlying four-hole culvert on Zhuji Intercity Railway, the settlement caused by shield tunnel underlying four-hole culvert was analyzed after consulting related standards, carrying out numerical simulation and monitoring. A three-dimensional numerical model was built for analysis of the settlement value of the culvert structure and the surrounding soil before reinforcement. A strengthening scheme was designed and used. A new numerical model was built for analysis of the settlement after reinforcement. A comparison was made between the field monitoring data after reinforcement and the data obtained by using the new model. The results show that the maximum settlement value of culvert is reduced from -45 mm to -1.5 mm, the field monitoring value after reinforcement is -3.1 mm, and the maximum settlement value of surface is reduced from -51 mm to -7 mm, the field monitoring value after reinforcement is -10.1 mm, and that the reinforcement scheme has a good strengthening effect and the two numerical models have great effectiveness and it provides reference for future similar.

Key words: shield tunnel, passing through, settlement analysis, numerical simulation, monitoring, reinforcement scheme

CLC Number:

X948

ZHU Yaofeng, TIAN Shuguang, NI Jinpeng, FAN Guoxiang. Analysis of four-hole culvert settlement caused by underlying shield tunnel of intercity railway[J]. China Safety Science Journal, 2018, 28(11): 116-121.

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