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结合具体的地质参数,采用太沙基、普氏、弹塑性等传统理论进行计算,获得支护结构所需的承受荷载。在研究富水软弱带塌陷机理的基础上,考虑渗透力、真空吸蚀力、自身重力、摩擦阻力和支撑力5个因素,依据现场地质条件,按照致塌力和抗塌力两大类别构建改进的极限平衡力学模型,从而计算出支护结构所承受荷载。以后期的现场实测结果为验证标准,对上述4种方法的准确性进行校验,结果表明极限平衡力学模型是最优方法。结合具体地质条件,构建富水软弱带的极限平衡力学模型是衬砌荷载计算的新途径,对类似地质条件的隧道支护结构设计具有重要意义。
Combined with the specific geological parameters, the traditional theory of Taishaji, Platts, elasto-plasticity is used to calculate the load bearing capacity required for the supporting structure. On the basis of studying the collapse mechanism of weak water zone in soft water, considering the factors of seepage force, vacuum erosion, gravity, frictional resistance and supporting force, according to the on-site geological conditions, Improved limit equilibrium mechanics model, which can calculate the load bearing structure. The field test results in the later period are the verification standard, and the accuracy of the above four methods is verified. The results show that the limit equilibrium mechanics model is the best method. Combining with the specific geological conditions, the limit equilibrium mechanics model for constructing the weak zone of water-rich is a new way to calculate the lining load, which is of great significance for the design of the tunnel supporting structure with similar geological conditions.