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公路隧道是地下隐蔽工程,在设计阶段通过地质钻探获得的隧道围岩地质资料十分有限,施工前准确预测隧道位置的地层特性困难较大。为保证隧道工程质量和施工安全,在施工中进行监控量测监测围岩动态变化和支护效果,以及对隧道设计方案和施工方法进行修正极为重要。结合忻保高速公路官地坪2号隧道施工监控量测实施情况,对施工阶段的监控量测特点和有关技术要求进行探讨。
Road tunnels are underground concealed projects. The geological data of tunnel surrounding rocks obtained through geological drilling in the design stage are very limited. Therefore, it is very difficult to accurately predict the stratigraphic characteristics of tunnel locations before construction. In order to ensure the quality of tunnel construction and construction safety, it is very important to monitor and measure the dynamic changes of surrounding rock and support effect in construction as well as to correct the tunnel design scheme and construction method. Combined with the construction monitoring measurement of Guandingping No.2 tunnel of Xin-Bao Expressway, the characteristics of the monitoring and measurement of the construction phase and the related technical requirements are discussed.