隧道衬砌外水压力计算方法研究

Study on the computation method of external hydraulic pressure upon tunnel lining

隧道工程中地下水作用在衬砌上的外水压力是进行衬砌设计的一个重要因素,如何确定外水压力是隧道工程界迫切需要解决的一个问题。本文详尽论述了折减系数法、理论解析法、解析数值解法、水文地球化学方法和渗流理论分析法五种计算方法,并建立了渗流场与应力场的全耦合计算模型。

External hydraulic pressure upon tunnel lining is one of important factors of design lining in tunnel engineering. How to calculate external hydraulic pressure upon tunnel lining is an urgent problem. The previous relevant researches may be divided into the followings： reduction coefficient method, theory analysis method,analytical -numerical method, hydrogeoehemical method, seepage field analysis method, and so on. The coupled analysis model of uniform seepage flow force and stress field is set up, and the model considers that the permeability coefficient varies with stress level.