Abstract
Long-term stability calculation of reservoir bank slope considering water-rock interaction
Highlights
The researches on degradation of water-rock interaction have achieved some results in recent years [1, 2]
This paper, based on the typical slope (Muyubao bank slope) in Three Gorges Reservoir area, considers the degradation of rock mass caused by water-rock interaction, establishes a Tehnički vjesnik 24, 1(2017), 283-289 function to describe relationship between dry-wet cycle times and damage period, converts mechanical parameters of rock into rock mass, calculates the safety factor under different degree of degradation and constructs a comprehensive system of slope stability evaluation
The evaluation results of the slope were compared with the landslide safety factor under corresponding phase, a forecasting system based on time deduction was established
Summary
The researches on degradation of water-rock interaction have achieved some results in recent years [1, 2]. The reservoir water level fluctuation in Sichuan basin red-bed region has caused a series of landslides and mudstone due to softening of sandstone. This paper, based on the typical slope (Muyubao bank slope) in Three Gorges Reservoir area, considers the degradation of rock mass caused by water-rock interaction, establishes a Tehnički vjesnik 24, 1(2017), 283-289 function to describe relationship between dry-wet cycle times and damage period, converts mechanical parameters of rock into rock mass, calculates the safety factor under different degree of degradation and constructs a comprehensive system of slope stability evaluation. Preliminary estimate shows that large water level fluctuation in reservoir area takes place once a year; the frequency of heavy rain and rainstorm is about 15 times per year, and every 3 years add a flood. Taking confining pressure as zero, the mechanical parameters of degradation function in experiment are as Eq (4), Eq (5) and Eq (6) [9] shows:
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