昔格达组粉砂岩作为筑坝土料的工程特性研究  

Engineering Properties of Xigeda Strata Siltstone as the Filling Material of Earth-Rock dam

作　　者：左永振[1] 张伟[1] 张晓川 党琛 

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,武汉430010 [2]攀枝花市水利水电勘测设计院,四川攀枝花617000 [3]攀枝花市西区梅子菁水库管理局,四川攀枝花617000

出　　处：《长江科学院院报》2016年第3期84-88,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学青年基金项目(51309024);水利部公益性行业科研专项经费项目(201201039)

摘　　要：昔格达组地层是分布于四川西部攀枝花及西昌地区的一种特殊的工程性质较差的半成岩,攀西地区是我国能源富集的地区,也是我国需要重点发展的水电能源地区,开展昔格达组地层研究对当地的基础设施建设有重要的意义。针对梅子箐水库扩建工程拟采用的昔格达组粉砂岩,采用大尺寸试验设备,进行了物理力学性能试验,探讨其作为筑坝土料的适宜性问题。试验研究表明:昔格达组粉砂岩具有较好的抗剪强度指标,压缩性中等偏低,渗透性中等,抗渗透变形特性较好,可以作为筑坝土料。在力学性质上,昔格达组粉砂岩的性质更接近粉砂质土。The western region of Panzhihua city has abundant resources and will be the focus of development. Xigeda strata,which is distributed in this region,is a special soft rock with poor engineering properties. Research on Xigeda strata is of importance to the infrastructure construction and geologic disaster prevention in this region. Xigeda strata siltstone is planned to be used in the expansion project of Meizijing reservoir. In this paper we discuss the suitability of Xigeda strata siltstone as the filling material of earth-rock dam through a number of physical and mechanical tests by using large size test equipment. Test result reveals that Xigeda strata siltstone has good shear strength,good resistance to penetration deformation,with medium compressibility and permeability. It can be used as the filling material of earth-rock dam. The nature of Xigeda strata siltstone is close to that of silty soil in mechanical properties.

关 键 词：昔格达组 粉砂岩 筑坝土料 土工试验 工程性质 

分 类 号：TV41[水利工程—水工结构工程]