您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第11卷    第3期    总第59期    2014年6月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7029(2014)03-0094-07
基于巴西劈裂试验的顺层板岩边坡“滑移-拉裂”破坏研究
董辉1,张海明1,傅鹤林2,刘运思2,饶军应2

(1.湘潭大学 土木工程与力学学院,湖南 湘潭 411105;
2.中南大学 土木工程学院,湖南 长沙 470075
)

摘 要: 怀通高速公路沿线边坡以板岩边坡为主,为揭示板岩边坡的破坏模式与板岩层理角度之间的关系以及获得板岩边坡的稳定性判据,进行针对性的试验研究和理论分析。选取沿线边坡岩样并按照不同层理角θ进行分组,开展巴西圆盘劈裂试验。试验发现:随着层理角度的变化,试样发生5种破坏模式,0°<θ<30°时为拉伸破坏,30°<θ<45时为拉裂-滑移破坏,45°<θ<75°时为滑移-拉裂破坏,75°<θ<90°时为滑移破坏,θ=90°时为压张型破坏;其次,对顺层板岩边坡整体滑移破坏和局部滑移-拉裂破坏判据进行推导,得出发生整体滑移破坏的临界坡高公式以及发生局部滑移-拉裂破坏的临界坡长方程。最后,结合怀通高速公路沿线板岩边坡进行实际应用,与沿线板岩边坡实际稳定性情况相吻合。

 

关键字: 板岩;顺层边坡;巴西劈裂试验;变形模式;滑移-拉裂

Research on the bedding slate slope slip-crack destruction based on Brazilian disk splitting tests
DONG Hui1, ZHANG Haiming1, FU Helin2, LIU Yunsi2, RAO Junying2

1.College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China; 
2.School of Civil Engineering, Central South University, Changsha 410075, China

Abstract:The slope along Huaitong highway is mainly slate slope. In order to reveal the connection between the failure model and the bedding angle of the slate slope and get the criterion of slate slope stability, the specific experimental research and theoretical analysis were performed in this paper. First of all, after selecting rock samples along the slope and grouping them in accordance with different bedding angles, the Brazilian disk splitting tests were conducted. The tests show that there are 5 failure modes with the bedding angles changing as follows: tensile failure with 0°<θ<30°, rip-slip failure with 30°<θ<45°, slip-tensile failure with 45°<θ<75°, sliding failure with 75°<θ<90°, pressure tension destruction with θ=90°. Secondly, the criterion of the overall sliding failure and partial slip-tensile failure of slate slopes was deduced and the critical slope height and the critical slope length equation were derived when failure occurs. Finally, combining slate slopes along the Huaitong highway, those conclusions were applied into the actual projects and it can be found that the stability condition is made coincident with the actual stability condition of the slate slopes along the highway.

 

Key words: slate slope; bedding slope; Brazilian splitting test; deformation pattern; slip-crack

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn