摘要
结合四川宝兴河铜头水电站混凝土拱坝,对坝肩稳定进行了三维地质力学模型试验研究,试验中采用变温相似材料模拟坝肩坝基岩体中的软弱结构面,运用超载与强降相结合的方法进行破坏试验。主要探讨了该拱坝坝肩失稳的破坏过程、破坏形态和破坏机理,获得了坝肩整体稳定安全度。试验表明:采用超载与强降相结合的破坏试验方法得到的安全度为3.12～3.51。同时表明在正常运行情况下,坝肩是稳定的,在强降阶段,坝肩出现开裂,尤以左坝肩为甚,因此对两坝肩特别是左坝肩上部进行加固处理是十分必要的。
With the method of combination of overload method and strength-decreasing method, the geomechanical model test on the stability of abutment is applied in this paper, and combined with the concrete double arch dam in Sichuan province. The destruction test is made to discuss the failure pattern, process and mechanism of dam abutment, with the temperature analogous material simulating the weak structural planes. The factor of safety of abutment is obtained by combination of overload method and strength-decreasing method, which is 3.12～3.51. In normal operation condition, the abutment can keep stable. And obvious fissures appear in abutments during decreasing strength period, especially in the left abutment. So reinforcements to dam abutments, especially to the left abutment,are necessary.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
2004年第6期1-5,共5页
Journal of Sichuan University (Engineering Science Edition)
关键词
混凝土拱坝
坝肩稳定
地质力学模型
破坏机理
安全度
concrete arch dam
the abutment stability
geomechanical model test
the comprehensive method test
stability failure mechanism.
