龙滩水电站右岸坝肩堆积风化深槽成因分析与治理

龙滩水电站右岸6号冲沟堆积风化深槽是坝肩及上航道边坡的主要工程地质问题之一，其成因是层状岩体正交坡层面与反倾向结构面组合的楔形体破坏形成冲沟，冲沟堆积物、楔形体残留岩体和顺层重力变形岩体经过长期风化所至。通过对其成因和稳定性分析，提出了综合治理措施。计算结果还表明，加强排水对该风化深槽边坡的治理是最有效的措施。

Cause analysis and treatment on accumulatively weathered deep channel at right-bank dam abutment of Longtan Hydroelectric Project

No.6 gully accumulatively weathered deep channel at the right bank of the Longtan Hydroelectric Project is one of the main geological issues encountered at the dam abutment and the upper part of the navigation channel slope. The weathered deep channel was caused by a destruction of the wedge formed by the orthogonal slope bedding plane and anti-dip structural surface of the bedded rock and then developed into a gully. And the gully debris, residual wedge rock and bedding gravity deformation rock formed the deep channel after a long time of weathering. Through an analysis regarding the formation cause and stability, the comprehensive treatment was provided. Also the calculation results showed that the treatment by strengthening the drainages there is a most effective solution to such weathered deep slope.