摘要
河道的平面变形贯彻于河道演变的始终。它经常采取渐变的方式。然而,当渐变积累到一定程度,量变达到质变,或者是遭到某种灾变性的事件,例如特大洪水,在局部地段就会出现剧烈的横向变形。这就是河岸的局部崩塌,习惯上也称为崩岸。崩岸按岸坡变形失稳产生的力学机理及变形程度可归纳为3大类型:侵蚀型、崩塌型、滑移型。按照崩岸后的形态则可划分为两种:条崩和窝崩。条崩是崩塌产生后近似平行岸坡的外部形态,属于侵蚀型和崩塌型。窝崩是崩塌或滑移后产生的另一种外部形态,有的属于崩塌,有的则属于滑移型。由于崩岸,对两岸的工农业生产带来巨大的危害,极须对之进行预测和治理。当然,崩岸的发生也有一特定的条件。
The plane deformation which always changes gradually, runs through the evolution of river course. Bankcollapse will happen in some areas when the plane deformation takes place from quantitative change to qualitative change, or it suffers from disasters, such as a catastrophic flood. According to the mechanics mechanism and deformation degree, bankcollapse is divided into three types:erosiontype, collapsetype and slidetype. According to the shape after bankcollapse, it is divided into two types:stripcollapse and pitcollapse.Stripcollapse, which belongs to erosiontype and collapsetype, is a deformation form that runs parallel to river bank. Pitcollapse, which belongs to collapsetype or slidetype, is another deformation form caused by collapse and slide. Bankcollapse has influenced the economy of the two banks. It should be forecasted and controlled.
出处
《中国地质灾害与防治学报》
CSCD
2003年第3期61-65,共5页
The Chinese Journal of Geological Hazard and Control
基金
长江中游主要水患区环境地质调查评价项目江西子项目(编号:19991230003044)
关键词
江西
长江岸带
崩塌
条崩
窝崩
bank-collapse
influence factor
bank along the Yangtse River in Jiangxi section
strip-collapse
pit-collapse
