高速滑坡形成机制:土粒子破碎导致超孔隙水压力的产生

被引：21

作者：

汪发武

机构：

[1] 吉林大学环境与建设工程学院!吉林长春日本金泽大学工学部

[2] -

来源：

长春科技大学学报 | 2001年 / 01期

关键词：

滑坡; 环剪试验; 粒子破碎; 超孔隙水压力;

D O I：

10.13278/j.cnki.jjuese.2001.01.013

中图分类号：

P642.22 [滑坡];

学科分类号：

0837 ;

摘要：

:通过排水剪切试验 ,揭示出易于产生粒子破碎的土体易于产生体积变化 ,土体初始结构和粒子破碎难易度对体积变化各阶段的影响。在与之相对应的不排水试验中 ,产生粒子破碎的土体最终产生了较高的超孔隙水压力 ,而且孔隙水压力产生的各阶段与排水试验中的体积变化阶段具有良好的对应关系。揭示了不同诱因产生的高速滑坡的共同特征 ,即在长距离运动中 ,由于粒子破碎的影响 ,滑动面土体在不排水条件下 ,抗剪强度因超孔隙水压力上升而下降 ,最终导致高速滑坡。同时 ,由于粒子破碎将导致土体自身渗透系数降低 ,土粒子破碎因而具有促进超孔隙水压力产生和减缓超孔隙水压力消散的双重效果

引用

页码：64 / 69

页数：6

共 10 条

[1]

An experimental study on grain crushing and excess pore pressure generation during shearing of sandy soils A key factor for rapid landslide motion. Wang F W. . 1998

[2]

Geotechnical simulation test for the Nikawa landslide induced by 1995.1. 17 Hyogoken - Nanbu earthquake. Wang F W,Sassa K,Fukuoka H. Soils and Foundations . 2000

[3]

A new ring shear apparatus and its application to the measurement of the residual strength. Bishop A W,Green G E,Garga V K,et al. Geotechnique . 1971

[4]

Earthquake- induced - landslides: Distribution, motion and mechanisms. Sassa K,Fukuoka H,Scarascia-Mugnozza G,et al. Soils and Foundations .

[5]

Undrained loading, a fundamental mechanism of mudslide and other mass movements. Hutchinson J N,Bhandari R K. Geotechnique . 1971

[6]

Landslides during earthquakes due to soil liquefaction. Sed H B. ASCE Journal of Geotechnical Engineering Division . 1968

[7]

A rapid landslide- debris flow at Izumi City, Kagoshima, Japan,1997. Sassa K,Fukuoka H,Wang F W. Landslide News (Japanese Landslide Society) . 1998

[8]

A new intelligent type dynamic loading ring shear apparatus. Sassa K. Landslide News (Japanese Landslide Society) . 1997

[9]

Large scale testing of rockfill materials. Marsal R J. ASCE Journal of Soil Mechanics and Foundations Division . 1967

[10]

Liquefaction and flow failure during earthquakes. Ishihara K. Geotechnique . 1993

← 1 →