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| Research on the Numerical Simulation Method of Grouting in Tunnel |
| GAO Feng, TAN Xu-kai |
| State Key Laboratory Cultivation Base for Bridge and Tunnel Engineering in mountain areas, Chongqing Jiaotong University, Chongqing 400074, China |
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Abstract Research purposes:For improving the accuracy and calculating precision of simulation method for the reinforcing measure in tunnel construction, the calculation error caused by routine method was studied. The reason for the calculation error was analyzed by finite element theory. And then two improved methods were brought up.
Research conclusions:(1) For the nodal displacement or strain in last load step, improving element′s parameters directly in reinforcing area makes nodes′ internal load increasing in the load step, which will arouse false results. (2) Two improved methods are taken to simulate the reinforcing measure. The one is that a layer of elements are adhered to each element in the reinforcing area to simulate the reinforcement, the another is that improving surrounding rocks parameters after relieving the strains field and retaining the stress field of last step. (3)The improved methods to simulate the reinforcing measure are verified by model test. (4)The improved methods in this paper can improve the calculating precision for the reinforcing measure simulation in tunnel engineering and geotechnical engineering.
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Received: 15 April 2014
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2014, Vol. 31 
