同济大学：《地质工程导论》课程电子教案（课件讲稿）Chapter V Landslide

CHAPTER V Landslide http://geology.com/usgs/landslides/

CHAPTER V Landslide http://geology.com/usgs/landslides/

New words and phrases landslides滑坡 fall落石 debris flow泥石流 topple崩塌 rockfall岩崩 colluvium崩积层 prone to倾向于 lateral spread水平滑移 trigger起动装置、触发 marl泥灰岩 landslip山崩，塌方 schistosity 劈理，片 slump混凝土塌落度， moraine冰渍 bedrock基岩 environmental degradation joints节理 环境退化 fracture 裂隙

New words and phrases landslides 滑坡 debris flow 泥石流 rockfall 岩崩 prone to 倾向于 trigger 起动装置、触发 landslip 山崩，塌方 slump 混凝土塌落度， moraine 冰渍 environmental degradation 环境退化 fall 落石 topple 崩塌 colluvium 崩积层 lateral spread 水平滑移 marl 泥灰岩 schistosity 劈理, 片 bedrock 基岩 joints 节理 fracture 裂隙

Questions? 1.What factors would induce large landslides? 2.What is the integrated intelligent design methodology for large landslides according to Fig 1? 3.Please describe the ground conditions of bachimen landslide from up to down. 4.What are included in the field monitoring system? 5.How to find the real slip plane? 6.What aspects are effective in prevention of landslides according to this paper

Questions? 1. What factors would induce large landslides? 2.What is the integrated intelligent design methodology for large landslides according to Fig 1? 3. Please describe the ground conditions of bachimen landslide from up to down. 4. What are included in the field monitoring system? 5. How to find the real slip plane? 6. What aspects are effective in prevention of landslides according to this paper ?

A ④ 0m ☑ Black marls LTZ IA☑ Fractures 。 Moraine deposits 3 Displaced material in moraine deposits Colluviums Displaced material in colluviums LTZ LAZ LTZ Landslide triggering zone LAZ Landslide accumulation zone ① Main scarp ② Topographic level before the landslide occurence ③ Slip surface(estimated)

Rotational landslide Translational landslide Block slide Types of landslide Rockfall Topple Debris flow Debris avalanche Earthflow Creep Lateral spread

Types of landslide

Definition A landslide is a geological phenomenon which includes a wide range of ground movement,such as rock falls,deep failure of slopes and shallow debris flows,which can occur in offshore,coastal and onshore environments. Landslides are known also as landslips,slumps or slope failure

Definition  A landslide is a geological phenomenon which includes a wide range of ground movement, such as rock falls, deep failure of slopes and shallow debris flows, which can occur in offshore, coastal and onshore environments.  Landslides are known also as landslips, slumps or slope failure

Definition the force of gravity pre-conditional factors build up specific sub- surface conditions that make the area/slope prone to failure, whereas the actual landslide often requires a trigger before being released

Definition  the force of gravity  pre-conditional factors build up specific sub￾surface conditions that make the area/slope prone to failure,  whereas the actual landslide often requires a trigger before being released

the influencing factors slope angle, climate, weathering, water content, vegetation, overloading, geology and slope stability

the influencing factors  slope angle,  climate,  weathering,  water content,  vegetation,  overloading,  geology and slope stability

The movement of landslide The movement of landslide material can vary from abrupt collapses to slow gradual slides and at rates which range from almost undetectable to extremely rapid. Sudden and rapid events----->the most dangerous Extremely slow landslides might move only millimetres or centimetres a year and can be active over many years.---->not a threat to people but to property

The movement of landslide  The movement of landslide material can vary from abrupt collapses to slow gradual slides and at rates which range from almost undetectable to extremely rapid.  Sudden and rapid events-----→ the most dangerous  Extremely slow landslides might move only millimetres or centimetres a year and can be active over many years. ----→ not a threat to people but to property

the influencing factors Landslides can cause fatalities,environmental degradation and damage to buildings,roads, to evaluate slope stability effective and timely remedial measures can be implemented

the influencing factors  Landslides can cause fatalities, environmental degradation and damage to buildings, roads,  to evaluate slope stability  effective and timely remedial measures can be implemented