隧道工程防排水是隧道工程设计的主要内容。如果没有可靠的防排水措施，地下水就会侵人，乃至 危害运营和影响隧道使用寿命。目前，地下工程最大的病害就是渗漏水。整治渗漏既困难费用又高。因此， 从设计时就引起重视，精心设计，精心施工。本文通过对长梁山隧道防排水设计原则、洞门段防排水、明洞防 排水、地层超前注浆、初期支护、衬砌盲沟、铺设防水层、结构自防水、施工缝的防水等方面的设计与探讨、详细 介绍了隧道工程防水技术及施工工艺。

The waterproof technique is the part and pared in tunnel. If it have not good waterproof measure, the groundwater will enter into and hurt the tunnel. Now, the most serious disaster in the underground engineering is the seepage water. Repairing the seepage water is difficult and costly. So， it is arresting from design, the design and construction should be elaborated. This paper introduces the principles of waterproof and drainage, the waterproof in the entrance of tunnel.the grouting technology,the earlier supporting,the drainage in tunnel lining,laying waterproof layer,the siructural waterproof and the waterproof in constructing sew. This paper introduces emphatically the waterproof design and construction technology in tunnel.