基于ABAQUS的群锚加固岩质边坡效果评价方法研究
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摘要
针对在岩质边坡内存在多组锚索群且缺乏预应力锚索周围注浆体参数的情况,提出了一种岩质边坡加固效果的评价方法,即:在用摩尔—库伦本构模型模拟岩质边坡的基础上,利用ABAQUS有限元软件中的TRUSS单元模拟预应力锚索,并结合强度折减法,通过数值计算对岩质边坡的群锚加固效果进行评价。研究结果表明,与未进行群锚加固相比,群锚加固可显著提高岩质边坡稳定安全系数,并且减缓边坡塑性区的发展和破坏过程。为此,该评价方法可用于实际工程中对各类群锚加固方案进行比较优选。
In accordance with the status that multi-groups of pre-stressed anchorages are arranged there inside of a rock slope,but no enough knowledge on the parameters of the grouting slurry around the pre-stressed anchors therein is available,a method to evaluate the strengthening effect of the group anchorage of rock slope is put forward herein,i.e.the pre-stressed anchor is simulated by TRUSS element of ABAQUS finite element software on the basis of the simulation of the rock slope with Mohr-Coulomb constitutive model,and the strengthening effect from the group anchorage on rock slope is evaluated through numerical calculation with the strength reduction method.The study result shows that the safety factor of rock slope cannot be significantly increased by the group anchorage,but the development and the possible failure process of the plastic zone of rock slope can also be alleviated,if compared with those un-strengthened ones.Therefore,this method can be applied to the comparative optimization made on all the kinds of group anchorages for strengthening rock slope in the engineering practice concerned.
In accordance with the status that multi-groups of pre-stressed anchorages are arranged there inside of a rock slope,but no enough knowledge on the parameters of the grouting slurry around the pre-stressed anchors therein is available,a method to evaluate the strengthening effect of the group anchorage of rock slope is put forward herein,i.e.the pre-stressed anchor is simulated by TRUSS element of ABAQUS finite element software on the basis of the simulation of the rock slope with Mohr-Coulomb constitutive model,and the strengthening effect from the group anchorage on rock slope is evaluated through numerical calculation with the strength reduction method.The study result shows that the safety factor of rock slope cannot be significantly increased by the group anchorage,but the development and the possible failure process of the plastic zone of rock slope can also be alleviated,if compared with those un-strengthened ones.Therefore,this method can be applied to the comparative optimization made on all the kinds of group anchorages for strengthening rock slope in the engineering practice concerned.
引文
[1]中国岩土锚固工程协会.岩土工程中的锚固技术[M].北京:地震出版社,1992.
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[3]庄晓莹,蔡永昌,朱合华.锚固边坡稳定性分析有限元模型及锚固效应探讨[J].岩土工程学报,2008,30(7):1099-1104.
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[5]政文棠,徐卫亚,张治亮,等.复杂楔形体组合下的岩质高边坡稳定分析[J].长江科学院院报,2008,25(5):115-119.
[6]费康,张建伟.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010.
[7]陈卫忠,伍国军,贾善坡.ABAQUS在隧道及地下工程中的应用[M].北京:中国水利水电出版社,2010.
[2]夏元友,李奇敏,张亮亮,等.群锚加固岩质边坡锚索受力特点数值试验[J].武汉理工大学学报,2009,31(11):79-83.
[3]庄晓莹,蔡永昌,朱合华.锚固边坡稳定性分析有限元模型及锚固效应探讨[J].岩土工程学报,2008,30(7):1099-1104.
[4]杨天鸿,郑雨天,唐春安,等.边界单元法在露天矿边坡疏干排水工程中的应用[J].勘察科学技术,1999(2):10-12.
[5]政文棠,徐卫亚,张治亮,等.复杂楔形体组合下的岩质高边坡稳定分析[J].长江科学院院报,2008,25(5):115-119.
[6]费康,张建伟.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010.
[7]陈卫忠,伍国军,贾善坡.ABAQUS在隧道及地下工程中的应用[M].北京:中国水利水电出版社,2010.
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