| 金沙江乌东德水电站坝址河床深厚覆盖层勘探取样与 试验研究 |
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| 引用本文： | 李会中, 郝文忠, 向家菠, 翁金望, 王团乐, 刘振华. 2008: 金沙江乌东德水电站坝址河床深厚覆盖层勘探取样与 试验研究. 工程地质学报, 16(S1): 202-207. |
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| 作者姓名： | 李会中 郝文忠 向家菠 翁金望 王团乐 刘振华 |
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| 作者单位： | 1.长江三峡勘测研究院有限公司 武汉 430074 |
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| 摘 要： | 河床深厚覆盖层勘探取样与试验研究是我国西部水电工程勘察中最常见技术难题之一。金沙江乌东德水电站坝址河床覆盖层厚一般52～65m,冲积、崩积及滑坡堆积等混杂,物质组成与结构不均,因坝址适宜修建混凝土拱坝,高围堰与深基坑稳定问题突出。为了查明河床覆盖层的工程特性,本文采用不遗漏软弱层采取了标贯与钻探相结合的钻进方法,为获得原状样研制了单管式与双管内筒式锤击取样器,为分析研究其物理力学性质开展了大量原位测试(重型动力触探、超重型动力触探、旁压试验、抽水试验、声波测试、钻孔彩电等)及室内土常规试验、模拟级配样试验等,较成功地解决了河床深厚覆盖层的勘探与试验难题,为乌东德水电站围堰与基坑工程设计参数的确定提供了可靠依据。
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| 关 键 词： | 乌东德水电站 河床深厚覆盖层 勘探取样 锤击式取样器 原位测试 室内试验 |
THE STUDY OF SAMPLING AND THE IN-SITU TEST AND LABORATORY TEST IN THE RIVER THICK OVERBURDEN LAYERS AT THE WUDONGDE DAM SITE AREA |
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| LI Huizhong, HAO Wenzhong, XIANG Jiabo, WEN Jingwang, WANG Tuanle, LIU Zhenhua. 2008: THE STUDY OF SAMPLING AND THE IN-SITU TEST AND LABORATORY TEST IN THE RIVER THICK OVERBURDEN LAYERS AT THE WUDONGDE DAM SITE AREA. JOURNAL OF ENGINEERING GEOLOGY, 16(S1): 202-207. |
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| Authors: | LI Huizhong HAO Wenzhong XIANG Jiabo WEN Jingwang WANG Tuanle LIU Zhenhua |
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| Affiliation: | 1.Three Gorges Geotechnical Consultants Co., Ltd, Wuhan 430074 |
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| Abstract: | One of the difficult technical problems for hydropower development in west China is how to take the undisturbed soil samples from the thick deposits in the river bed through boreholes and how to gained the physical and mechanical properties by the laboratory test and in-situ test. The thickness of the river deposits at the Wudongde dam site area is 52~65m.The alluvial, the colluvium and landslide mass constitute the river deposit. So the component and the structure of the river deposits show inhomogeneous Properties. The Wudongde narrow valley is apt to building the arc dam type. So the stability of the high cofferdam and the slope of the deep foundation pit are prominent engineering geological problems. For exploring the engineering characteristics of the river deposit, the advance exploring technology and the methods of the laboratory test and in-situ test were adopted. The standard penetration test was used during the drilling in order to pre-exploring the soft layer such as silt-clay, clay. In order to taking the undisturbed soil samples from the borehole, Single Rotary and Double Tube Core Barrel and The hammer Double Core Barrel With Inner Tube were developed. In order to verifying the physical and mechanical properties, the in-situ test (including the heavy dynamic penetration test, super-heavy dynamic penetration test, pressuremeter test, pumping test, acoustic prospecting and borehole TV .etc) and the laboratory test, the simulation of the soil sample gradation test were used . It is successfully solved the difficult problems of the exploration and the test in the thick river deposits and provided the reliable parameters for designing the high cofferdam and the cut slope of the deep foundation pit. |
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| Keywords: | Wudongde hydropower station The river bed thick deposit The exploration sampling The hammer core barrel In-situ test Laboratory test |
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