二塘沟水库右坝肩工程地质问题初步探讨分析  

Preliminary Discussion on Engineering Geological Problems of Right Abutment of Ertanggou Reservoir

作　　者：买合木提.巴拉提 虎胆.吐马尔白 吴彬[1] 王安民 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆水利水电勘察设计研究院,乌鲁木齐830091

出　　处：《新疆农业科学》2010年第7期1461-1465,共5页Xinjiang Agricultural Sciences

基　　金：新疆自然科学基金项目(200821172);新疆鄯善县二塘沟水库的勘测设计项目(56275)

摘　　要：【目的】通过现场试验、测试,对二塘沟水库右坝肩主要工程地质问题进行准确评价分析,为设计提供合理的地质参数和建议。【方法】以二塘沟水库右岸坝肩区为主要研究对象,进行现场岩石鉴定试验,钻孔压水试验,平洞岩石构造观测试验,室内岩石化学成分分析试验等。【结果】二塘沟水库右岸地形较为陡峭,岩性主要为层状凝灰岩夹凝灰质砂岩和砂岩。水库右坝肩整体构造发育:岩体完整性较差,靠近断层附近透水性和深度较大。据钻孔和平洞揭露,岩体强风化层厚2～3m,岩体较破碎。据钻孔水质分析得知,右岸地下水硫酸根离子含量514.37mg/L,具有结晶类硫酸盐型腐蚀性。【结论】二塘沟水库右坝肩岩体存在较深和较长的中等透水带、裂隙密集带和断层破碎带岩石碎屑水溶盐含量较高,岩体和地下水中硫酸盐对混凝土存在腐蚀性问题。[Objective]Through the experiment and test on the spot,to carry out analysis and evaluation of right abutment of Ertanggou Reservoir to provide reasonable geological parameters and related suggestions.[Method]In order to mainly study right abutment of Ertanggou Reservoir,the spot appraisal of rocks experiment,water presser experiment of drill,structure observation experiment of cavity rocks,analysis experiment of petrochemistry component in lab.were carried out.[Result]The landform of right abutment of Ertanggou Reservoir is steep,lithology manly consists of layer tuff and sandstone.The whole structure is developed.There are greater water permeability and depth near the fault.According to the drilling and aditing,the thickness of strong weathered layer of the rock body is 2 m-3 m,with crashed rock body.According to the drilling water quality analysis,content of sulphuric acid of ground water is 514.37 mg/L,with crystal kind of corrosivity of vitriol.[Conclusion]There are deeper and longer middle permeable zone,crack-intensive fault broken zone as well as clastic rocks that contain a higher water-soluble salt in the right abutment rock of the Ertanggou Reservoir.Sulfate in the rock and groundwater has potential corruptional offects on the concrete.The preliminary analysis on these above problems was carried out and then the rational approach and proposal on the these problems were recommended for the further study.

关 键 词：绕坝渗漏 中等透水带 岩石碎屑 水溶盐 溶蚀 硫酸盐腐蚀 

分 类 号：S29[农业科学—农业水土工程]