潘口水电站引水隧洞进水口边坡稳定性分析研究

发布时间：2018-05-31 20:55

  本文选题：潘口水电站 + 岩质边坡　； 参考：《南昌大学》2017年硕士论文

【摘要】：本文主要对潘口水电站引水隧洞进水口边坡稳定性进行研究。潘口水电站位于湖北省十堰市竹山县境内,地处堵河干流上游河段,坝址距竹山县城13km,距十堰公路162km。工程以发电、防洪为主,建成后还可以增加南水北调中线工程的可调水量,提高南水北调的供水保证率,改善库区通航条件等综合利用效益。水库总库容23.38亿m3,调节库容11.20亿m3,为完全年调节水库。电站装机2台,总装机容量500MW。潘口水电站为一等大(I)型工程。枢纽建筑物主要包括混凝土面板堆石坝、右岸岸边开敞式溢洪道、右岸泄洪洞、左岸引水隧洞、地面厂房和开关站等。引水隧洞进水口为1级建筑物,边坡级别为1级。潘口水电站引水隧洞进水口布置在左岸坝前,为岸塔式进水口,长30.0m,宽67.0m,高55.0m。地形自然坡度较陡,大部分地段基岩裸露,缓坡部位分布有残、坡积物,地基岩体类别为Ⅲ2类,由于进水口地形自然坡度较陡,夹有岩屑和构造泥,层间错动带发育频数,节理组合切割不利于进水口开挖边坡的稳定,严重危害进水口边坡的稳定性。为确保边坡岩体在运行期的稳定性,本论文对边坡在已有的地质参数和开挖边坡的稳定性进行研究,分析边坡在采取工程加固措施下减少边坡开挖高度、降低边坡开挖规模的可能性;分析边坡在水库蓄水后以及蓄水后遭遇地震时的稳定性;最后,提出经济合理、技术优化的边坡开挖方案及边坡加固措施。具体内容包括以下几个方面:(1)根据进水口边坡的地质、地形条件,建立范围、精度满足设计需要的计算模型;(2)研究进水口边坡在天然状态和开挖后的稳定情况、可能的失稳区域,并提出开挖方式、顺序,确定边坡的支护措施及需要重点加固的范围。(3)根据初步开挖加固方案,进行各种岩体力学参数敏感分析,进行开挖坡比和支护措施的敏感分析;(4)合理地选取可能的不同计算工况,对不同工况进行稳定性分析及支护方案的研究;(5)在上述各计算结果的基础上,对进水口边坡稳定性进行综合分析与评价。
[Abstract]:In this paper, the stability of intake slope of diversion tunnel of Pankou Hydropower Station is studied. Pankou Hydropower Station is located in Zhushan County, Shiyan City, Hubei Province. It is located in the upper reaches of the main river of Shuanhe River. The dam site is 13km from Zhushan County and 162km from Shiyan Highway. The main project is power generation and flood control. After the project is completed, the adjustable water quantity of the middle route project of South-to-North Water transfer Project can be increased, the water supply guarantee rate of the South-to-North Water transfer Project can be improved, and the comprehensive utilization benefit of the navigation condition of the reservoir area can be improved. The total storage capacity of the reservoir is 2.338 billion m3 and the regulating capacity is 1.12 billion m3. Power station installed 2 units, the total installed capacity 500MW. Pankou Hydropower Station is a first class project. The key buildings include concrete face rockfill dam, open spillway on the right bank, flood discharge tunnel on the right bank, diversion tunnel on the left bank, ground workshop and switch station, etc. The intake of diversion tunnel is class 1 building and the slope grade is 1 grade. The intake of diversion tunnel of Pankou Hydropower Station is arranged in front of the left bank dam, which is an onshore tower inlet with a length of 30.0 m, a width of 67.0 m and a height of 55.0 m. The natural slope of the topography is steep, the bedrock is exposed in most areas, the weak slope is distributed in the part of the gentle slope, and the slope is of type 鈪，

本文编号：1961250