摘要
利用多年冻土区昆仑山隧道2^#冲沟帷幕注浆的机会，将注浆孔当作测试孔，测试每个孔的水位和孔温。通过测试孔水位、孔温和注浆量变化分析，判断2^#冲沟融区发育特征，得出2^#冲沟沟底的融化深度远大于通常的冻土上限；阳坡地温高于阴坡地温；在2^#冲沟段，昆仑山隧道中心线左右至少7m范围内为融化区，融区深度在隧底2～5m以下；阳坡地层的孔隙率高于阴坡孔隙率，沟底岩层与地表有较为畅通的地下水流通道，沟底地下水渗流通道明显优于两侧山坡，沟心纵断面位置附近存在至少一条未被冻结的地下水通道，且该通道的埋置深度至少可达17～30m，为昆仑山隧道渗漏水病害治理提供依据。
The drilled grout holes are used to test ground water table and ground temperature by chance of curtain grouting at the No. 2 valley of Kunlun mountain tunnel. By analyses of ground water table and ground temperature and grouting - amount variation in the drilled grout hole, some ideas on thawing area developed state are identified for treatment of water seepage from the tunnel that： （ 1 ）the thawed depth at the No. 2 valley is far greater than permafrost table at this area, and ground temperature at slope facing south is greater than that at slope facing north, （2 ） a thawed area exists 7 m around the center of the tunnel at the No. 2 valley, and the thawed depth is below 2 to 5 m under the bottom of the tunnel, （ 3 ） the porosity of slope to south is higher than that of slope to north, and there are more than one underground channel between bedrock and the surface at the No. 2 valley, the channel under the valley better than of slopes, （4） there are more than one unfrozen channel 17 to 30 m underground along the valley at least.
出处
《工程地质学报》
CSCD
2006年第5期588-591,共4页
Journal of Engineering Geology
关键词
多年冻土
地下水位
地温
融区
Permafrost, Ground water table, Ground temperature, Curtain grouting, Tunnel, Kunlun mountain
