水利工程楔形体稳定性分析及支护优化处理
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摘要
岩质边坡失稳是山区坡体破坏的主要形式,而楔形体破坏是岩质边坡失稳的一种常见破坏模式。利用赤平极射投影对多组结构面的边坡进行定性分析,筛选出优势结构面,利用Swedge软件对优势结构面组合的楔形体进行稳定性分析。计算结果表明,结构面J4和J8组合时,该组合形式形成的楔形体易发生潜在滑移,需要对其进行支护处理。利用Swedge软件进行优化支护分析,计算得到最优化的锚杆支护产状为313°∠69°,最优化的锚杆支护位置与结构面交线是垂直的,符合工程实际要求。
Rock slope instability is the main form of slope failure in mountain area. Wedge failure is a common failure mode of rock slope instability. Multiple discontinuities slope are qualitative analyzed by stereographic projection. Then the dominant discontinuities are screened out. The stability analysis of wedge with multiple discontinuities are carried out by Swedge software. The results show. When the continuity of J4 and J8 is combined. The wedge formed in this combination is prone to slip. It is necessary to carry out support treatment. Optimized support analysis is carried out by Swedge software. The optimum bolt support orientation is 313°∠69°. The optimum bolt support position is perpendicular to the intersection of the discontinuity,which conforms to the actual requirements of the project.
Rock slope instability is the main form of slope failure in mountain area. Wedge failure is a common failure mode of rock slope instability. Multiple discontinuities slope are qualitative analyzed by stereographic projection. Then the dominant discontinuities are screened out. The stability analysis of wedge with multiple discontinuities are carried out by Swedge software. The results show. When the continuity of J4 and J8 is combined. The wedge formed in this combination is prone to slip. It is necessary to carry out support treatment. Optimized support analysis is carried out by Swedge software. The optimum bolt support orientation is 313°∠69°. The optimum bolt support position is perpendicular to the intersection of the discontinuity,which conforms to the actual requirements of the project.
引文
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[2]王家臣,孙书伟.露天矿边坡工程[M].北京:科学出版社,2016.
[3]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994.
[4]徐开礼,朱志澄.构造地质学[M].北京:地质出版社,1984.
[5]姚环,郑振,简文彬,等.公路岩质高边坡稳定性的综合评价研究[J].岩土工程学报,2006,28(5):558-563.
[6]宋义亮,罗延婷,井培登,等.赤平极射投影法在岩质边坡稳定性分析中的应用[J].安全与环境工程,2011,18(1):103-105.
[7]彭红胜,徐光黎,李志鹏,等.全空间赤平投影法在公路边坡稳定性分析中的应用[J].中外公路,2015,35(4):48-52.
[8]Shields D R.Buckling of micropiles[J].Journal of Geotechnical&Geoenvironmental Engineering,2007,133(3):334-337.
[9]GB 50330-2013,建筑边坡工程技术规范[S].