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装机450MW的巴格利哈尔水电站位于查谟和克什米尔邦的查谟市和斯利那加市之间的喜马拉雅山脉,目前正在施工之中。德国Lahmyer国际股份有限公司起着主管工程师的作用,代表业主负责设计和施工监理。地下电站建筑群包括几个大的地下洞室:地下厂房、变压器室、下游集水廊道、尾水隧洞、上游调压井、闸门室以及一些互连隧洞。其重点放在地下厂房、变压器室和集水廊道的开挖和监测上。根据地质数据以及从现场测试获得的连续监测的岩石变形、应力和强度参数,对岩石支护设计作了修改,并且对地下洞室的总体变形进行了预测。在洞室开挖期间,采用会聚测量法、多点钻孔伸长计(MPBX)和荷载传感器进行严密的监测。当洞室的主体部分开挖完成后,变形达到了使已安装的岩石锚杆产生过应力的程度。因此,在所有洞室安装一种更长更强的岩石锚杆进行辅助支护。另外,要通过合理的设备管理和严格的监理以维持正确的开挖程序和及时支护。
The 450MW Baghleyhar hydroelectric power station is located in the Himalayas between Jammu and Srinagar in Jammu and Kashmir and is currently under construction. Germany Lahmyer International Co., Ltd. plays a leading engineer role, on behalf of the owners responsible for the design and construction supervision. Underground power plant complex includes several large underground caverns: underground powerhouse, transformer room, downstream water collecting gallery, tailrace tunnel, upstream surge tank, gatehouse and some interconnecting tunnels. Its emphasis is on the excavation and monitoring of underground powerhouses, transformer rooms and catchment corridors. Based on the geological data and the continuously monitored rock deformation, stress and strength parameters obtained from field tests, the rock support design was modified and the overall deformation of the underground cavern was predicted. During the excavation of the cavern, tight monitoring was carried out using convergence measurements, multi-point drill extensometer (MPBX) and load cell. When the excavation of the main part of the cavern is completed, the deformation reaches the level at which the installed rock bolt is over stressed. As a result, a longer, stronger rock bolt was installed in all caverns for secondary support. In addition, through proper equipment management and strict supervision to maintain the correct excavation procedures and timely support.