[1]秦邦民,唐 波,张莉萍,等.边坡开挖对楔型岩块稳定性的影响[J].江苏水利,2022,(01):5-9+13.
　QIN Bangmin,TANG Bo,ZHANG Liping,et al.Influence of slope excavation on stability of wedge-shaped rock block[J].JIANGSU WATER RESOURCES,2022,(01):5-9+13.
点击复制

边坡开挖对楔型岩块稳定性的影响()
分享到：

《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年01期
页码:
5-9+13
栏目:
水利规划与设计
出版日期:
2022-01-26

文章信息/Info

Title:
Influence of slope excavation on stability of wedge-shaped rock block
文章编号:
1007-7839(2022)01-0005-05
作者:
秦邦民1;  唐 波1;  张莉萍1;  许宝田 2
(1.南京市水利规划设计院股份有限公司, 江苏 南京 210022; 2.南京大学地球科学与工程学院, 江苏 南京 210046)
Author(s):
QIN Bangmin1;  TANG Bo1;  ZHANG Liping1;  XU Baotian2
(1.Nanjing Water Conservancy Planning and Design Institute Co., Ltd., Nanjing 21022, China; 2.School of Earth Science and Engineering, Nanjing University, Nanjing 210046, China)
关键词:
开挖边坡;  楔型岩块;  变形;  稳定性
Keywords:
slope excavation;  wedge-shaped rock block;  deformation;  stability
分类号:
TV853
文献标志码:
B
摘要:
南京秦淮东河铜家山段河道开挖后形成近70 m的高边坡，边坡岩体主要为黄马青组(T2h)泥质粉砂岩，岩体内发育多组结构面。边坡开挖后其稳定性受结构面组合影响较大，采用离散元法模拟边坡开挖对楔型岩块变形和稳定性影响，模拟分两种情形:(1)结构体为刚体，结构体发生的变形或破坏主要位于结构面上，块体只发生位移或转动，不发生形状和体积的改变;(2)结构体为可变形块体，结构面和块体均可能发生变形或破坏。结果表明，不稳定结构体的滑动在坡面引起较大的变形，特别在结构面位置处有位移值突变现象，如不对坡面块体采取加固措施，则可能引起大范围的岩体破坏; 岩块为可变形固体条件下边坡开挖后岩体侧向位移快速增加，岩体发生变形后岩块也可能发生破裂，加速岩体失稳。
Abstract:
After the excavation of the Tongjiashan reach of the Qinhuai East River in Nanjing, a high slope of nearly 70m was formed. The rock mass of the slope is mainly argillaceous siltstone of Huangmaqing Formation(T2h), and multiple groups of structural planes developed in the rock mass. The stability of the slope after excavation is greatly affected by the combination of structural planes. The discrete element method is adopted to simulate the influence of slope excavation on the deformation and stability of wedge-shaped rock block. Based on the engineering geological conditions and the actual situation of slope engineering, there are two schemes for simulation:(1)The structural body is rigid, and the deformation or damage of the structure is mainly located on the structural plane, and the block only undergoes displacement or rotation, and does not change the shape and volume.(2)The structure is a deformable block, and both the structural plane and the block may be deformed or destroyed. The analysis results show that the sliding of the unstable structure causes a large deformation on the slope surface, especially a sudden change in the displacement value at the position of the structural plane. If no reinforcement measures will be taken for the unstable block on the slope surface, it may cause a large-scale of rock mass destruction. Under the condition that the rock mass is a deformable solid, the lateral displacement of the rock mass increases rapidly after the excavation of the slope. After the rock mass is deformed, the rock mass may also fracture, accelerating the instability of the rock mass.

参考文献/References:

[1] 张莉萍, 邱德俊, 许宝田. 节理化软岩开挖边坡变形及稳定性分析[J]. 江苏水利, 2017(3):41-45.
[2] 邱德俊, 何菁, 许宝田. 岩体结构对软岩边坡破坏模式的影响分析[J]. 江苏水利, 2017(8):20-24.
[3] 中华人民共和国水利部. 水利水电工程边坡设计规范[S]北京:中国水利水电出版社, 2007:6.
[4] 杨春和, 包宏涛, 王贵兵. 岩体节理平均迹长和迹线中点面密度估计[J]. 岩石力学与工程学报, 2006, 25(12):2475-2480.
[5] 胡惠华, 张鹏, 龚道平. 反倾硬质岩高陡斜坡变形破坏机制分析[J]. 岩石力学与工程学报, 2020, 12(增刊2):3367-3377.

相似文献/References:

[1]张莉萍,邱德俊,许宝田.节理化软岩开挖边坡变形及稳定性分析[J].江苏水利,2017,(03):41.
　ZHANG Liping,QIU Dejun,XU Baotian.Deformation and stability analysis of jointed soft rock excavat ion slope[J].JIANGSU WATER RESOURCES,2017,(01):41.

备注/Memo

备注/Memo:
收稿日期:2021-08-08
基金项目:江苏省水利科技项目(2016054)
作者简介:秦邦民(1974—),男,高级工程师,硕士,研究方向为工程地质。E-mail: 414543866@qq.com
更新日期/Last Update: 2022-01-26