节理岩体超声测试及单轴压缩试验研究

被引:22
作者
孙旭曙 [1 ]
李建林 [2 ]
王乐华 [2 ]
陈兴周 [3 ]
李飞 [1 ]
程冬 [1 ]
机构
[1] 三峡大学水利与环境学院
[2] 三峡大学土木与建筑学院
[3] 西安科技大学建筑与土木工程学院
关键词
节理岩体; 超声波测试; 单轴压缩试验; 各向异性; 力学特性;
D O I
10.16285/j.rsm.2014.12.018
中图分类号
TU452 [岩体力学性质及应力理论分析];
学科分类号
0801 ; 080104 ; 0815 ;
摘要
为了获取节理岩体各向异性力学特性和声波传播规律的相互关系,通过制作圆柱形单一预制贯通节理试件,开展了7种不同倾角节理试件的超声波波速测试和单轴压缩试验。试验结果表明:(1)节理试件波速测试值离散性较大,但总体服从正态分布,波速平均值介于石膏试件和完整试件之间,波速随节理倾角增大呈线性递减;(2)不同倾角的节理面对节理试件力学特性的影响很大,在应力-应变关系、变形特征、强度特征和破坏模式上均表现出显著的各向异性特征;(3)节理试件的力学性质和超声波传播特性变化规律区别很大,采用超声波波速确定节理试件的力学参数会存在很大误差。
引用
收藏
页码:3473 / 3478+3488 +3488
页数:7
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