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利用数值计算手段,研究4车道连拱隧道二衬结构施工过程中出现裂缝后的安全性。计算结果表明:除衬砌开裂几处单元安全系数未达到规范要求值外,其他单元均满足规范要求。最后,基于计算结果和现场情况给出了施工建议。
Using numerical calculation method, the safety of cracks occurred in the construction process of the second lining of 4-lane double-arch tunnel was studied. The calculation results show that all the units meet the requirements of the code except that the safety factor of several units of lining cracks does not reach the required value of the specification. Finally, the construction suggestions are given based on the calculation results and the site conditions.