期刊论文

TEST AND CHARACTERIZATION METHOD FOR SHEAR STRENGTH OF SLATE CONTAINING WEAK INTERCALATED LAYER

中文

工程地质学报

1004-9665

2019

27

3

525-531

10.13544/j.cnki.jeg.2018-219

长沙理工大学道路结构与材料交通行业重点实验室开放基金项目(kfj160303) 国家自然科学基金项目(51374129)资助.

本校为第一机构

在微机控制岩石剪切试验机上,针对预裂的含薄层黏土充填结构面板岩试件,进行不同法向应力下的结构面直剪试验,发现:结构面直剪试验中,并不是整个结构面都参与抗剪工作,只有部分结构面发挥抗剪作用,而且发挥抗剪作用的有效摩擦面积随法向应力的增大而增大,但是增大速率逐渐减小。基于整个结构面发挥抗剪作用的假设,获得了结构面表观剪应力-剪位移关系曲线,拟合计算了结构面表观抗剪强度指标;同时基于每次直剪试验中结构面部分区域发挥抗剪作用的假设,获得了结构面有效剪应力-剪位移关系曲线,拟合计算了结构面有效抗剪强度指标。对比两者发现:结构面抗剪强度指标中,内摩擦角与发挥抗剪作用面积的选...

Direct shearing tests of pre-split structural plane filled with clay films are conducted on the slate specimens using a microprocessor servo-controlled shearing tester under various normal stresses. After that,two experimental phenomena are found as follows. (1) During the process of direct shearing test of structural plane,the areas which bored the shearing force were not the whole structural plane,but were partial structural plane. (2) The values of effective frictional areas which bored the shearing force during every shearing process,could increase with the increasing of normal stress,but ...