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栎斜隧道是宁波象山港大桥公路中的一座双向四车道连拱隧道,出口段存在明显的偏压现象,围岩较破碎,地质条件复杂.左洞出口段遇大雨侵蚀后围岩变形突然增大,变形速率加快,致使洞口出现塌方.通过对塌方段主客观原因的分析,采用洞口刷坡、打设长管棚并喷射混凝土的综合方法加固处理.同时在处理段洞内增设监测断面进行周边收敛位移、拱顶下沉和地表沉降监测等监控手段,并与数值模拟结果对比分析.监控量测和数值模拟结果基本相同,表明处治措施得当,隧道洞口围岩基本趋于稳定,效果良好,为类似工程提供参考.
Quercus oblique tunnel is a two-way four-lane multi-arch tunnel in the highway of Xiangshan Port in Ningbo with obvious bias phenomenon in the exit section and fragmentation of the surrounding rock with complicated geological conditions. The deformation of the surrounding rock suddenly increases when the left exit section encounters heavy rainfall Large deformation rate, resulting in cave cave collapse.Through the analysis of subjective and objective causes of landslip section, the use of hole brushing slope, laying long pipe shed and shotcrete consolidation method of consolidation.At the same time in the processing section of the additional monitoring section The surrounding convergence displacement, vault settlement and ground settlement monitoring and other monitoring methods, and compared with the numerical simulation results.Controlled measurement and numerical simulation results are basically the same, indicating that the treatment measures properly, the tunnel entrance rock basically stabilized and the effect is good , For similar projects provide a reference.