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hua gang yan ti zhong sui dao de da yong shui tan fang
Author(s): 
Pages: 49
Year: Issue:  4
Journal: Hydrogeology and Engineering Geology

Keyword:  地下水隧洞埋藏式压力钢管施工支洞泥石流引水式开挖断面导洞水头南桠河;
Abstract: <正> 四川石棉南桠河上兴建一座隧洞引水式中型电站。其埋藏式压力钢管道设计开挖断面为5.5米、坡度30°,1975年4月即将凿通斜穿洞室的断层F1时,断层上盘涌出的地下水,以150米的水头喷射而出,涌水量达400升/秒,泥石流充塞导洞及施工支洞三十余米。数天后涌水渐小到每秒数十升,半年后才逐渐稳定到5-15升/秒。一年后共出渣二千多车,但洞中仍有大量堆渣。
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