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| 边坡岩体弱面注浆宏观效应数值模拟分析 | |
| 引用本文： | 沈金瑞,林杭,许世远,许万忠.边坡岩体弱面注浆宏观效应数值模拟分析[J].中国地质灾害与防治学报,2007,18(3):82-87. |
| 作者姓名： | 沈金瑞 林杭 许世远 许万忠 |
| 作者单位： | 1. 华东师范大学,资源与环境科学学院,上海,200062;莆田学院,环境与生命科学系,福建,莆田,351100 2. 中南大学,资源与安全工程学院,湖南,长沙,410083;莆田学院,土木建设工程系,福建,莆田,351100 3. 华东师范大学,资源与环境科学学院,上海,200062 4. 中南大学,资源与安全工程学院,湖南,长沙,410083 |
| 基金项目： | 福建省自然科学基金;福建省莆田市科技局科研项目 |
| 摘 要： | 为反映弱面注浆对边坡岩体的宏观效应,通过对边坡弱面注浆前、后两种状态采用FLAC3D数值计算模型,分析边坡岩体注浆前、后的应力、位移场的变化。结果表明:注浆前,竖向拉应力和水平拉应力区向边坡内侧增大,且平行节理面分布,节理面两侧应力变化梯度明显;静态位移和动态位移向边坡内侧递减,位移在节理面处明显发生突然变化。边坡内侧节理面是构成潜在滑动面的主要因素。注浆后,拉应力区明显变小,拉应力贯通区消失,应力变化梯度减小;静态位移和动态位移明显下降,节理面处位移突变减小或消失。说明注浆加固处理对节理损伤起到很好的修复作用,提高了节理的抗剪强度和抗剪刚度。从而使岩体的应力场和位移场变得均匀和连续,节理面的拉应力区减小,较大的位移得以抑制,提高了节理边坡的整体性和稳定性。 |
| 关 键 词： | 弱面注浆 边坡稳定 应力 位移 |
| 文章编号： | 1003-8035（2007）03-0082-06 |
| 收稿时间： | 2006-11-02 |
| 修稿时间： | 2007-03-22 |
The macroscopical effect of grouting in weak planes of slope rockmass |
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| SHEN Jin-rui,LIN Hang,XU Shi-yuan,XU Wan-zhong.The macroscopical effect of grouting in weak planes of slope rockmass[J].The Chinese Journal of Geological Hazard and Control,2007,18(3):82-87. | |
| Authors: | SHEN Jin-rui LIN Hang XU Shi-yuan XU Wan-zhong |
| Abstract: | In order to know the macroscopical influences of grouting in weakness plane to jointed slope,a numerical calculation model is founded by FLAC3D which is based on the method of fast lagrangian analysis of continua three dimensions.The differences of stress field and displacement field in slope before and after grouting are analyzed.The analysis results show that before grouting,the vertical tensile stress and horizontal tensile stress increase from outside to inside of slope,and the direction of these stress is parallel to the joint plane.The stress beside the joint plane change obviously.The static and dynamic displacement decrease from outside to inside of slope,these displacements change a lot in the joint plane.The joint plane is the most important factor for instability of slope.After grouting,the area of tensile stress becomes smaller,the phenomenon of connection of tensile stress area disappears,the grads of the stress become smaller.The value of static and dynamic displacement obviously become smaller,the mutation of displacement in the joint plane disappears.Damage to slope by the joints is repaired.Shear resistance strength and shear stiffness are increased after grouting.Stress field and displacement field of rock mass are more symmetrical and continuous.Areas of tensile stress are reduced and the large amount of displacement in joint plane is restrained.The integrity and stability of slope is improved after grouting. |
| Keywords: | FLAC3D |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |