| 汉源二蛮山高速滑坡启程阶段孔隙水压力效应分析 |
| |
| 引用本文： | 牛彦博,胡卸文,罗刚,顾成壮.汉源二蛮山高速滑坡启程阶段孔隙水压力效应分析[J].工程地质学报(英文版),2013,21(1):69-75. |
| |
| 作者姓名： | 牛彦博 胡卸文 罗刚 顾成壮 |
| |
| 作者单位： | 1.西南交通大学地球科学与环境工程学院 成都 610031; |
| |
| 基金项目： | 国家自然科学基金资助项目(40972175);NSFC-云南联合基金重点项目(U1033601);中央高校基本科研业务费专项资金(SWJ-TU11ZT14)资助 |
| |
| 摘 要： | 高速滑坡在启程滑动时锁固端突然剪断,剪应力释放导致滑带附近孔隙水压力突然增大,从而大大降低了有效应力,使滑坡具有很高的初始速度。以二蛮山滑坡为例,采取现场调查、室内试验与理论研究相结合的方法展开工作,分析了滑带土粒子破碎程度对孔隙水压力的影响,给出了滑坡启动时产生高孔隙水压力的条件; 在理论研究的基础上,通过实地勘察,验证了二蛮山滑坡具备产生高孔隙水压力的条件。运用土力学和材料力学理论,导出了高速滑坡启程阶段孔隙水压力表达式,计算了二蛮山滑坡启程阶段的孔隙水压力,进一步研究了滑坡启程阶段的孔隙水压力效应。
|
| 关 键 词： | 高速滑坡 启程 滑带土颗粒 孔隙水压力效应 |
| 收稿时间： | 2012-05-14 |
EFFECT OF PORE WATER PRESSURE ON SET-OUT RANGE OF HIGH SPEED LANDSLIDE OF ERMANSHAN IN HANYUAN CITY |
| |
| NIU Yanbo HU Xiewen LUO Gang GU Chengzhuang.EFFECT OF PORE WATER PRESSURE ON SET-OUT RANGE OF HIGH SPEED LANDSLIDE OF ERMANSHAN IN HANYUAN CITY[J].Journal of Engineering Geology,2013,21(1):69-75. |
| |
| Authors: | NIU Yanbo HU Xiewen LUO Gang GU Chengzhuang |
| |
| Institution: | 1.Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031;2.Aseismic Engineering Technology Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031 |
| |
| Abstract: | Because the lock segment can suddenly snip during the process of high speed landslide in the set-out range, the shearing stress is also suddenly released, which can make the pore water pressure near the sliding zone sharply increase. Therefore it greatly reduces the effective stress and makes the landslide has a very high initial velocity. Taking the Ermanshan landslide as example, this paper employs the field survey, laboratory test and theoretical research methods to study such mechanism. The pore water pressure can be affected by the degree of crushing of slip soil particles, which is analyzed. The condition of producing high pore water pressure when landslide starting is given. On the foundation of theoretical research, it shows that the landslide at Ermanshan site has the condition of producing the high pore water pressure through the exploration. By applying the theory of soil mechanics and the results of mechanics of materials, it can conclude the formula of the pore water pressure in the starting-up of the high speed landslide, and the pore water pressure of Ermanshan landslide are computed by this formula. Furthermore it can deeply investigate the pore water pressure effect in the starting-up of the landslide. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《工程地质学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《工程地质学报(英文版)》下载免费的PDF全文 |
|
