浅谈隧道衬砌水荷载问题

Brief Talk about Problem of Water Load of Tunnel Lining

关于处在渗流场中的隧道衬砌所受的水荷载,不同的规范有着不同的规定,有的按静水压力来计算,忽略渗流的影响;有的则认为因为隧道的排水消除了作用在衬砌上的外水压力,所以结构不受水荷载作用;有的则比较折中,将静水压力乘上一个折减系数作为作用在衬砌外边线上的计算水压力。为了明确水荷载概念,根据笔者的实际经验,对衬砌在不同透水性的情况下所受到的水荷载进行分析。从而进一步明确作用于衬砌背后的水荷载问题及其变化规律。

For the water load of tunnel lining in seepage yard there are different regulations for different specifications. Some are calculated by static water pressure negligible the seepage influence. And some think that the structure is not acted by water load, because the drainage of tunnel eliminated the outer water pressure acted on lining. And others compromise, they multiply a discount coefficient by static water pressure as the calculated water pressure acted on the outer boundary line of lining. In order to determine the water load idea, in accordance with the Author's actual experience the paper analyzes water load of lining in the condition of different permeation, thus further determining the water load problem acted on back of lining and its change law.