卡洛特水电站河湾地块防渗可靠性地质研究

Geological study on seepage prevention reliability in river bend area of Karot Hydropower Station in Pakistan

卡洛特(Karot)水电站位于巴基斯坦吉拉姆(Jhelum)河上,枢纽工程区位于“几”字形河湾地块,分布地层为新近系弱胶结碎屑沉积岩,河湾地块防渗可靠性对渗控工程布置有着重要的影响。开展了河湾地块防渗可靠性专题研究,重点针对河湾地块水文地质条件、岩体渗透特性及防渗可靠性开展了大量的钻孔、声波测井、彩色电视录像及压水试验勘察研究,并进行了地下水渗流场三维数值模拟研究,以查明河湾地块水文地质条件及岩体渗透特性。通过充分论证认为:河湾地块具有良好的防渗可靠性,防渗体系完善,满足规范和蓄水安全要求。相关勘察研究方法和内容可为类似工程提供参考。

The Karot Hydropower Station is located on the Jhelum River in Pakistan,and the pivotal buildings of the station are located on the"几"shaped river bend area.The distribution strata are weakly consolidated clastic sedimentary rocks of Neogene.The seepage prevention reliability of the river bend area was critical to the general layout of seepage prevention work,so the research on the seepage prevention reliability of the river bend area was carried out specifically.This study focused on the hydro-geological conditions,rock mass permeability properties and seepage prevention reliability of river bend area through carrying out a large number of drilling,sonic logging,color TV videotaping,water pressure test survey and research,and three-dimensional numerical simulation of groundwater seepage field.Through thorough demonstration,it was concluded that the river bend area had good seepage prevention reliability,the seepage prevention system was sound and could meet the requirements of relevant codes and water storage safety.The relevant investigation methods and contents can be taken as reference for similar projects.