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运用普氏理论、朗金土压力理论,对地面非对称填载作用下既有明挖隧道围岩的破坏模式和围岩压力计算进行了探讨。分析表明,地面非对称填载作用下既有明挖隧道的围岩压力计算按埋深可分为三种情况:深埋时采用普氏理论计算;浅埋且地面填载侧边墙与滑裂面之间会产生土拱效应时,该边墙所受的围岩压力采用普氏理论来计算,对侧边墙借助朗金土压力理论来计算;浅埋且地面填载侧边墙与滑裂面之间不产生土拱效应时,将左右边墙都当作挡土墙,借助朗金土压力理论来计算。
Using Platts theory and Longjin earth pressure theory, the failure mode of surrounding rock and the calculation of surrounding rock pressure of existing Ming tunnel under asymmetric surface loading are discussed. The analysis shows that the calculation of surrounding rock pressure of existing Ming tunnel under asymmetric loading can be divided into three kinds of situations: Platts calculation is adopted when deep buried; Surface soil between the arching effect occurs, the wall pressure of the surrounding rock by Platts theory to calculate, on the side wall with Langjin earth pressure theory to calculate; shallow buried and ground fill the side walls and slippery When there is no arching effect between the cracked surfaces, the left and right side walls are treated as retaining walls and calculated using the Langjin earth pressure theory.