The Study on the Slope Stability Near the Dam of ChenCun Reservoir

Abstract:

Since ChenCun dam was build, there have occurred some landslides near the dam, which do influence its security. What contribute to these landslides are such geological factors as faults, tension joints and bedding joints, and heavy rainfall during the rainy season. According to the structure of the landslides, they are divided into four types: slip-shear slide, burst slide, wedge slide and slump slide. After studying the relation of the precipitation during the rainy season and the number of landslides of every year (from 1982 to 1996), the author finds the majority of the landslides occurred in these rainy seasons when the precipitation is more than 600 mm or 650 mm. In order to assess the stability of the slopes near the Dam, some mathematical ways are used to calculate the general value of the slopes, which shows the stability of the slope. Based on the value, the slopes are divided into three types: the full-stable, the partly-stable and the non-stable. From these statd above, it can be known when and where the land slides would most probably take place, and then some measures would be taken in time to protect the slopes.

Key words:

ChenCun Reservoir; the type of landslides; precipitation parameter; fuzzy assessment

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