关于引黄工程隧洞渗漏防止的探讨

山西省万家寨引黄工程隧洞长达２０８ｋｍ，所经地区地质条件变化多，经过湿陷性黄土地区，隧洞渗漏将导致地基沉陷，造成隧洞变形、裂缝，严重的甚至坍塌。作为防止渗漏的措施，首先是衬砌混凝土要满足抗渗、抗裂要求；其次是加入土工膜等防渗材料。处理好伸缩缝、施工缝，最后进行渗漏检测。检验防渗效果，检查隐患、漏洞，以便发现问题，及时处理。

Probing into Seepage prevention of Tunnel of the YRDP

As the length of tunnels in the YRDP is up to 208 km,and there are most changeful geological condition,especially collapsible loess,along the tunnel lines,the seepage prevention has been the important subject of the YRDP.The author stresses that the following points must be taken into account in seepage prevention measures:(1) The lining concrete should meet the requirement of both crack resistance and water tightness;(2) The seepage prevention materials such as geomembrane should be adopted;(3) The construction joint and expansion joint should be treated well;(4) The seepage test should also be done to inspect the effect of the seepage prevention.