复工高速公路路堑边坡防护稳定性研究  被引量:1

Study on Protection Stability of Resumption Highway's Cutting Slope

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作  者:褚夫蛟[1] 曾水生 王培森 蓝柳海 祝诗宇 

机构地区:[1]中南大学资源与安全工程学院,长沙410083 [2]中交一公局第二工程有限公司,苏州215101

出  处:《世界科技研究与发展》2015年第6期692-696,共5页World Sci-Tech R&D

基  金:国家自然科学基金(50490274);湖南省自然科学基金(06JJ3030);中南大学前沿研究计划(2010QZZD001)资助

摘  要:为复工研究路堑边坡防护的稳定性,以萍洪高速公路挖方段K12+565为研究对象,采用FLAC 3D软件对土袋凹陷、护面墙裂纹现象以及边坡岩土体进行研究,分析其位移大小和应力集中情况。结果表明,土袋回填支护发生的凹陷位移较大,护面墙内部出现了较强的应力集中;由于岩土体也出现了较强的剪应力集中,将护坡体拆除后,容易出现边坡破坏现象,需增加锚杆支护。以4 m、6 m、8 m、10 m长度的锚杆作为研究对象,对增加锚杆支护后的边坡塑性区进行计算分析,发现采用10 m长度锚杆进行支护可有效减少边坡的塑性破坏,有利于边坡的稳定。In order to study the protection stability of resumption cutting slope, excavation segment K12 + 565 of Ping Hong highway was taken as the object of this research,FLAC 3D software was used to study the sag of soil bag,cracks of facing wall and slope, with the displacement size and stress concentration analyzed. The results showed that the soil bag support had a larger sag displacement, and there was a strong stress concentration within the facing wall. If the existing slope protection structure was excavated,it was easy to appear the slope failure as the rock mass had a strong shear stress concentration, so increasing bolt supporting was needed. Taking anchors which length were 4 m ,6 m, 8 m and 10 m as the research object, the range of plastic zone of slope after bolting support was calculated and analyzed. It's found that 10m bolt supporting could reduce the plastic failure of the slope effectively, conducive to the stability of the slope.

关 键 词:高速公路 复工路堑边坡 稳定性 FLAC 3D 锚杆 

分 类 号:U416.14[交通运输工程—道路与铁道工程]

 

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