摘要
对于富水区深埋隧洞来说,外水压力是一项重要荷载,是隧洞设计及施工中需重点研究的问题,国内外已有众多学者对此展开研究,但对高外水作用下的隧洞围岩稳定及支护结构设计依然是个难题。本文采用考虑降雨入渗渗流场分析的有限单元方法,对锦屏二级水电站深埋引水隧洞的外水压力进行了研究,提出富水区深埋隧洞渗流控制"以堵为主,堵排结合"。通过对围岩高压固结灌浆,封堵地下水,利用灌浆圈围岩和隧洞衬砌支护联合承载。
To a deep-lying tunnel in the area with high groundwater table, external water pressure is the main load and the determination of the external water pressure is the important problem the design and the construction of the tunnel. Therefore, it is essential to study the external water pressure of the deep-lying tunnel in Jinping cascade 2 hydropower station. In this paper the authors have studied the problem of the water pressure by means of the finite element daring method of analyze on the seepage field with rainfall. A new water-controlling idea that is preventing the subsurface water complemented with draining it has been put forward Jinping tunnel. By high-pressure concretion grouting, the subsurface water can be prevented, and the surrounding rock in the grouting zone and the supporting structures can be combined to bear loads.
出处
《水文地质工程地质》
CAS
CSCD
2004年第3期85-88,95,共5页
Hydrogeology & Engineering Geology
关键词
深埋隧洞
外水压力
渗流控制
deep-lying tunnel
external water pressure
seepage control
