考虑卸荷的加锚裂隙岩体力学参数研究  

Study on mechanic parameters of bolted fractured rock mass under unloading

作　　者：邓华锋[1,2] 李建林[1,2] 王乐华 

机构地区：[1]三峡大学土木水电学院,宜昌443002 [2]武汉大学水利水电学院,武汉430072 [3]不详

出　　处：《岩土力学》2008年第4期1027-1030,共4页Rock and Soil Mechanics

基　　金：教育部重点资助项目(No.02099)

摘　　要：加锚岩体的力学参数确定一直是岩土工程中的一个重要和困难的问题,在考虑卸荷的情况下,对边坡岩体的分离块体经系统锚杆加固后的抗压强度、泊松比、弹性模量及c,?值的变化规律进行了数值模拟计算和分析,并考虑了不同的加卸载路径、锚固角和岩体强度对加固效果的影响,计算结果表明,在分析卸荷岩体边坡加固时,必须考虑裂隙岩体卸荷历史的影响。最后用试验结果验证了等效数值计算方法的正确性。How to decide the parameters of bolted rock mass is an important and complicated problem in geotechnical engineering. Taking unloading into account, the variation regularity of compression strength, Poisson＇s ratio, elastic modulus, c and friction angle φ values were studied and simulated by computer; and different loading-unloading paths, anchoring angle, strength of rock mass were taken into account. The computed results show that the influence of unloading process before reinforcement should not be neglected. Finally, some experimental data were used to testify the above-mentioned analysis.

关 键 词：系统锚杆 卸荷岩体 力学参数 数值模型试验 

分 类 号：TU452[建筑科学—岩土工程]