库水位升降作用下土质岸坡水与土体相互作用机理

本文从库水位周期性升降过程中水与土体物理作用、水与土体化学作用及水与土体力学作用三个方面,系统分析库水位升降作用下土质岸坡水与土体相互作用机理。结果表明:水与土体的物理化学作用,在水位周期性升降初期作用显著,随着周期性升降次数的增加,土体力学参数变化基本趋于稳定;水与土体力学作用,在库水位升降过程中,静水压力和动水渗透压力作用与土体的渗透性及水位升降速率有关,浮托力与岸坡的形状及淹没程度有关,岸坡土体基质吸力值随含水量的增加减小较快。

The Soil Bank Slope Water and Soil Function Mechanism under Fluctuation of Reservoir Water Level

This paper, from throe aspects of the physical action of water and soil in process of reservoir water level fluctuation, the chemical action of water and soil and mechanics action of water and soil, systematically analyses the mechanism of interaction between water and soil of soil bank under fluctuation of reservoir water level. As a resuh, the physical action of water and soil is affected obviously in the fluctuation of water level, the variation of soil mechanics parameter tends to be stable with the increase of the number of fluctuation cycles. In the process of reservoir water level fluctuation, hydrostatic and hydrodynamic seepage pressure relates to the soil permeability and water level fluctuation rate, uplift force, shape of slope, flooding degree; bank soil matric suction decreases rapidly with the increase of moisture content.