耐高压厚壁井管与上托盘式异径井管止水法在隧道施工中的应用

我国是个多山国家,隧道工程在公路和铁路建设中占很大比例,涌水问题历来是个难点,多采用排引水方法将水排出施工场地以外,这样会使地下水系统破坏,造成生态失衡,引起环境恶化等生态问题。本文通过雁门关隧道涌水的防治,详细介绍了耐高压厚壁井管与上托盘式止水法1]的原理、施工工艺及防治效果。该方法不仅可以成功根治水患,保证隧道施工顺利进行,而且可以使其得以充分利用,保护当地生态环境,该涌水防治技术是隧道工程的一大创新,达到了国际领先水平,如推广应用,可实现极高的经济效益和社会效益。

APPLICATION OF THE SEALING METHOD OF HIGH PRESSURE——RESISTANT BORE PIPE WITH THICK-WALL AND DIFFERENT DIAMETER OF UPPER TRAY-TYPE TO TUNNEL CONSTRUCTION

China is a mountainous country,so tunnel work accounts for a large proportion in road and railway construction.Prevention and control of water gushing hazards are always difficult.In general,methods of water drainage and diversion are used to move water outside the construction site,but it would bring destruction of groundwater system,ecological imbalance,environmental deterioration and other problems.In this paper,basing on the engineering practice of water gushing treatment in Yanmenguan Tunnel,the principles,construction techniques and control effect of the sealing method of high pressure-resistant bore pipe with thick-wall and upper tray-type are detailed introduced.This method could successfully prevents the flooding and ensure the safety of tunnel construction,and also could take full advantage of groundwater and as well protect the local ecological environment.This kind technology of gushing water controlling is a major innovation in tunnel project which has reached international advanced level.Popularization and application of this water gushing treatment method will bring huge economic and social benefits in tunnel work.