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Hydropower station seepage prevention and drainage method based on karst depression and karst channel environment
The invention relates to the technical field of hydropower station seepage prevention and drainage, in particular to a hydropower station seepage prevention and drainage method based on karst depression and karst channel environment. According to the method, a karst depression is located in the upstream direction of a bank slope section of a water retaining dam, an underground power plant is located in the downstream direction of the bank slope section of the water retaining dam, and the method comprises the steps that the development direction of a karst channel is judged; an anti-seepage curtain is arranged, the anti-seepage curtain is connected with the water retaining dam and extends in the downstream direction along the bank slope section, so that the anti-seepage curtain is blocked between the underground power plant and the karst depression, and the karst channel is cut off; the development direction, position and elevation of the karst channel adjacent to the anti-seepage curtain are judged; and according to the judged development direction, position and elevation, a drainage hole is formed by conducting in-hole expanding excavation on the grouting adit of the anti-seepage curtain, and the drainage hole is communicated with the karst channel. According to the method, the foundation engineering cost of seepage prevention and drainage of karst depression in the hydropower station hub area can be reduced, the construction period is shortened, and depression flood disasters are solved.
本发明涉及水电站防渗和排水技术领域，特别是一种基于岩溶洼地及岩溶通道环境的水电站防渗和排水方法。本方法中，岩溶洼地位于挡水大坝的岸坡段的上游方向，地下发电厂房位于挡水大坝的岸坡段的下游方向，步骤包括：判断岩溶通道的发育方向；设置防渗帷幕，防渗帷幕连接挡水大坝，沿岸坡段朝下游方向延伸，使防渗帷幕阻挡于地下发电厂房与溶洼地之间，并将岩溶通道截断；判断岩溶通道邻近防渗帷幕处的发育方向、位置及高程；根据判定的发育方向、位置及高程，通过对防渗帷幕的灌浆平洞进行洞内扩挖形成排水洞，排水洞连通岩溶通道。本方法在能够降低水电站枢纽区岩溶洼地防渗及排水的基础工程造价，缩短施工工期，解决洼地洪涝灾害。
Hydropower station seepage prevention and drainage method based on karst depression and karst channel environment
The invention relates to the technical field of hydropower station seepage prevention and drainage, in particular to a hydropower station seepage prevention and drainage method based on karst depression and karst channel environment. According to the method, a karst depression is located in the upstream direction of a bank slope section of a water retaining dam, an underground power plant is located in the downstream direction of the bank slope section of the water retaining dam, and the method comprises the steps that the development direction of a karst channel is judged; an anti-seepage curtain is arranged, the anti-seepage curtain is connected with the water retaining dam and extends in the downstream direction along the bank slope section, so that the anti-seepage curtain is blocked between the underground power plant and the karst depression, and the karst channel is cut off; the development direction, position and elevation of the karst channel adjacent to the anti-seepage curtain are judged; and according to the judged development direction, position and elevation, a drainage hole is formed by conducting in-hole expanding excavation on the grouting adit of the anti-seepage curtain, and the drainage hole is communicated with the karst channel. According to the method, the foundation engineering cost of seepage prevention and drainage of karst depression in the hydropower station hub area can be reduced, the construction period is shortened, and depression flood disasters are solved.
本发明涉及水电站防渗和排水技术领域，特别是一种基于岩溶洼地及岩溶通道环境的水电站防渗和排水方法。本方法中，岩溶洼地位于挡水大坝的岸坡段的上游方向，地下发电厂房位于挡水大坝的岸坡段的下游方向，步骤包括：判断岩溶通道的发育方向；设置防渗帷幕，防渗帷幕连接挡水大坝，沿岸坡段朝下游方向延伸，使防渗帷幕阻挡于地下发电厂房与溶洼地之间，并将岩溶通道截断；判断岩溶通道邻近防渗帷幕处的发育方向、位置及高程；根据判定的发育方向、位置及高程，通过对防渗帷幕的灌浆平洞进行洞内扩挖形成排水洞，排水洞连通岩溶通道。本方法在能够降低水电站枢纽区岩溶洼地防渗及排水的基础工程造价，缩短施工工期，解决洼地洪涝灾害。
Hydropower station seepage prevention and drainage method based on karst depression and karst channel environment
基于岩溶洼地及岩溶通道环境的水电站防渗和排水方法
LU SIYUAN (author) / WANG BINZHOU (author) / CHENG JIAN (author) / TAN KUN (author) / LIU QIWEN (author)
2023-10-27
Patent
Electronic Resource
Chinese
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