Properties of the high rock slope of Hongjiadu hydropower project and its engineering treatment measures

摘要

The dam site of Hongjiadu CFRD is located in the area with high mountains,narrow valley andKarstic formation. The river bank is very steep and developed with soft intercalations. The height of the leftabutment rock slope is 310 m and the height of the large scale bedding slope of intakes is more than 360 m.The scale and the height of those slopes are rarely finding both at home and abroad. It is the main difficulty forthe construction of the project. By using different methods to determine the strength parameters and applyingmultiple slope stability analysis methods,several engineering measures were accepted,which include the timelyanchoring during excavation,continuous narrow plinth with constant length,huge anti-slide piles plus anchorcables,etc. The measures have successfully solved the high slope problems of the project. Now,the slope hasbeen safely operated for 3-6 years and still in good condition.