岩质边坡锚杆应力监测离心模型试验研究  

The centrifugal model test of cable stress monitoring for rock slope

作　　者：郭永建 曹周阳[2] 生丽娟 

机构地区：[1]青岛国信胶州湾交通有限公司,山东青岛266500 [2]郑州航空工业管理学院土木建筑工程学院,河南郑州450015

出　　处：《山东大学学报（工学版）》2016年第2期101-107,共7页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(41272285)

摘　　要：基于离心模型试验方法,以m(重晶石粉)∶m(石英砂)∶m(石膏)∶m(水)=1.50∶1.00∶0.25∶0.50的质量比制备岩石替代材料,并制作3类典型岩质边坡的试验模型,通过应力监测方法研究岩质边坡失稳前的应力变化规律。试验结果为3类岩质边坡失稳前的应力变化曲线均较为平缓,监测预警易于把握,且具有相通性,均可采用Logistic曲线形式进行拟合;层状岩质边坡监测应以滑动面下部监测为主,结构面控制岩质边坡的破坏形式主要以拉剪破坏为主,试验选取的边坡类型监测应以上部结构面为主,碎裂结构岩质边坡应以边坡上部监测为主。综合离心模型试验结果表明,采用应力监测的方法评价公路岩质边坡的稳定性具有可行性。The centrifugal model test was taken to study the stress monitoring for the three typical types rock slopes,with the similar material mass ratio of quartz sand,plaster,and water as 1.50∶1.00∶0.25∶0.50.Test results showed that stress curves of the three typical types rock slopes were more flatted before the slope failure,stress monitoring and early warning were easy to grasp,and with similar properties,stress curves were used in the form of logistic curves fitting. Stress monitoring site of stratified rock slope should be mainly located in lower part of sliding surface.Failure mode of rock slope controlled by structural plane was mainly in the form of tensile shear,and test stress monitoring site of rock slope should be mainly located in upper part of structure plane,stress monitoring site of cataclastic structure rock slopes should be mainly located in upper part of slope.Centrifuge model test results showed that it was feasible to apply stress monitoring method to evaluate the rock slope stability.

关 键 词：岩质边坡 应力监测 离心模型试验 稳定性评价 Logistic曲线 

分 类 号：TU476[建筑科学—结构工程]