季冻区隧道渗漏与冻害防治研究

针对季冻区隧道渗漏水与冰冻产生的原因，提出了采用防水、排水、保温、供热等方法进行综合防治的工程措施，其中包括：防水板选用低温性能好的材料．并在防水层敷设前尽量降低喷射混凝土表面的粗糙度，以保持防水层的长期完好；在衬砌施工缝中，采用先排后堵的可排水止水带；在衬砌下隅角背后，设置保温层，并使之防潮；在衬砌紧靠防水层一侧，设置环向电加热带，必要时通电加热使上部渗水顺畅下排。

A Study on Prevention of Tunnel leakage and Freezing in Seasonally Frozen Zone

To counter the reasons of tunnel leakage and freezing turned up in seasonally frozen zone, comprehensive techniques to prevent the problems are presented. The techniques include: (1) choosing water-proof material with good properties at low temperature, and smoothing the surface of shot-concrete to keep the water-proof membrane in good condition over a long period of time; (2) installing drainage water stop between the water-proof layer and the lining to supply the passage for the water which has passed through the layer; (3) setting up thermal insulating layer on the back of lining at the bottom corners and preventing the layer from moist; and (4) installing electro-thermal wires between the water-proof layer and the lining, and electrifying to melt the ice on the back of lining when necessary.