Study on the Mechanism of Large Accumulation Landslide Instability Along the River
In order to study the impact of rainfall and river water level fluctuations on the stability of accumulation body along the river section,taking the K347+560-K347+870 section of the Rongzun Expressway as an example,the mechanism of landslide instability was studied through engineering ge-ological exploration,numerical simulation and other means.The results show that as rainfall and river water level rise,the increase in pore water pressure in the front part of the landslide is greater than that in the rear part.The annual stability change pattern shows an increase in rainfall intensity,a con-tinuous rise in river water level,a decrease in slope stability,a weakening of rainfall intensity,a slow decline in river water level,and an increase in slope stability.Affected by heavy rainfall during the flood season,the Chishui River experiences a sudden rise and fall,with a maximum daily drop of 2.65 meters.The stability change pattern is opposite to that of the whole year,manifested as a sudden rise in river water,an increase in slope stability,a sudden drop in river water,and a decrease in slope sta-bility.
accumulation bodyrainfallpore water pressurestability
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