煤系地层公路隧道衬砌结构缺陷状态下结构安全性评估方法

Structure Safety Evaluation Method for Highway Tunnel Lining in Coal Measure Strata under Structural Defect State

结合公路隧道衬砌厚度不足的典型结构缺陷和煤系地层地质结构松散和泥岩互层差异性风化易富水的特殊地质条件,通过工程实例从隧道结构安全性分析方法、结构安全评定办法两个方面阐述了煤系地层下公路隧道在衬砌结构厚度不足和围岩富水软化条件下结构安全性评估办法,并通过计算结论与工程实际对比,证明了文中所述结构安全性评估方法的工程实用性。

Combining the typical structural defects of the insufficient thickness of the highway tunnel lining with the special geological conditions of the loose geological structure of coal measure strata and water-rich caused by the differential weathering of mudstone interlayer,based on actual engineering,in terms of the tunnel structure safety analysis method and the structure safety evaluation method,this paper expounded on a structure safety evaluation method for highway tunnels in coal measure strata under conditions of the insufficient thickness of lining structure and water-rich softening of surrounding rocks.Comparing the calculation results to practical engineering,the engineering practicability of the safety evaluation method mentioned in this paper was verified.