论文部分内容阅读
石门水库大坝是1973年完成主体工程并蓄水的混凝土双曲拱坝,最大坝高88米。河床电站的高压输水隧洞在拱坝1~*及~*2坝段下部30米基岩处通过右坝肩。1983年发现右坝肩地下水位异常,并逐渐上升超过了地下水设计允许水位,影响右坝肩的稳定,危及拱坝安全。经过隧洞放空检查以及对地下水长期观测资料分析,查明为隧洞防渗砌体破损,在隧洞通过坝肩围岩处形成了裂隙通道,使库水经过高压隧洞外渗,对坝肩岩体构成了扬压力。为了保证右坝肩岩体的稳定和解决高压隧洞横穿坝肩的渗透问题,决定在洞内采用氰凝灌浆和环氧砂浆补强及粘贴橡皮的加固措施,并在隧洞上部岩体590米高程采
Shimen Reservoir dam is the main project completed in 1973 and water concrete double curvature arch dam, the maximum dam height of 88 meters. The high-pressure water conveyance tunnel of the riverbed power station passes the right abutment at the 30m bedrock below the arch dam 1 ~ * and ~ * 2 dam sections. In 1983, it was found that the groundwater table anomaly at the right abutment and gradually rose above the allowable water level of the groundwater, affecting the stability of the right abutment and endangering the safety of the arch dam. Through the tunnel venting inspection and long-term observation of groundwater data analysis, identified as impermeable masonry tunnel damage in the tunnel through the shoulder rock formed a fissure channel, so that the reservoir water through the high pressure tunnel extravasation of the abutment rock mass composition Upward pressure. In order to ensure the stability of the right abutment rock mass and solve the problem of the penetration of high pressure tunnel across the dam abutment, it is decided to adopt cyanidation grouting and reinforcement measures of epoxy mortar to reinforce and stick the rubber in the tunnel. In the upper 590m Elevation mining