西藏扎拉水电站施工总布置规划

Construction general layout planning of Xizang Zhala Hydropower Station

西藏扎拉水电站工程区河谷深切,岸坡陡峻,地形地质条件复杂,可供利用的施工场地有限。为满足工程建设和生产运行管理需要,减少对耕地和经济林地的占用及对当地环境的不利影响,梳理了影响工程施工总布置的主要因素,如地形地质条件、水土保持、征地移民要求等,对料源选择及砂石加工系统布置、引水隧洞施工通道布置、施工交通规划、土石方平衡及弃渣场布置规划等进行了研究。结合工程枢纽线性布置特点和地形地质条件,按照分散集中布置的原则,提出了首部枢纽施工区、引水隧洞、电站厂房等工程施工总布置规划方案,较好地满足了工程施工需要。研究成果对高山峡谷地区水电工程施工总布置具有一定的借鉴意义。

The project area of Xizang Zhala Hydropower Station has deep river valleys,steep bank slopes,complicated topographic and geological conditions,and limited construction sites available.In order to meet the needs of project construction and production and operation management,minimize the occupation of arable land and economic forest land and reduce the adverse impact of construction on the local environment,the main factors affecting the general layout of the project construction were sorted out,such as topographic and geologic conditions,soil and water conservation,and the requirements of land acquisition and migration,etc.The selection of material sources and the arrangement of sand and gravel processing system,the construction access road for the diversion tunnels,the planning of the construction traffic,the balance of earth and rock and the abandonment site were studied and planned.Combined with the linear layout characteristics of the main project,topographic and geological conditions,the general arrangement planning scheme for the construction area of the head work,diversion tunnel,power plant and other engineering works was proposed in accordance with the principle of centralized layout in different areas,which can better meet the needs of the project construction.The research results can provide a reference for the construction general arrangement of hydropower projects located in high mountain valley areas.