基坑快速开挖对邻近高陡强风化岩边坡的稳定性影响
董理金,王华俊,库光依,姚文杰,齐昌广.基坑快速开挖对邻近高陡强风化岩边坡的稳定性影响[J].宁波大学学报(理工版),2026,39(3):54-64.DOI:10.20098/j.cnki.1001-5132.2025.1116
DONG Lijin,WANG Huajun,KU Guangyi,YAO Wenjie,QI Changguang.The influence of rapid foundation pit excavation on
the stability of adjacent high and steep strongly weathered rock slopes
[J].Journal of Ningbo University(Natural Science & Engineering Edition),2026,39(3):54-64.DOI:10.20098/j.cnki.1001-5132.2025.1116
| Title: | The influence of rapid foundation pit excavation on
the stability of adjacent high and steep strongly weathered rock slopes |
| 作者: | 董理金, 王华俊, 库光依, 姚文杰, 齐昌广 |
| Author(s): | DONG Lijin, WANG Huajun, KU Guangyi, YAO Wenjie, QI Changguang |
| 关键词: | 强风化岩; 快速开挖; 桩锚支护; 数值模拟; 变形机理 |
| Keywords: | strongly weathered rock; rapid excavation; pile-anchor support; numerical simulation; deformation mechanism |
| 分类号: | TU941 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.1116 |
| 文献标识码: | A |
| 摘要: | 以宁波凰山岙强风化岩高陡边坡基坑工程为对象，采用现场监测、理论计算与ABAQUS数值模拟相结合的方法，研究快速开挖条件下桩锚支护体系的变形特征与主要影响因素。结果表明，快速开挖阶段为主要变形期，坑顶最大水平与垂直位移分别约为6.9mm和7.4mm；锚杆张拉后的位移速率下降超过90%，桩身呈上大下小的悬臂型变形模式；数值模拟与实测吻合良好（关键部位误差<10%），验证了修正摩尔–库伦模型的合理性；参数分析显示，适当增加桩长、减小桩距及增大锚杆倾角均可有效降低变形，其中桩长由10m增至16m可减少水平位移约30%。研究成果可为类似强风化岩边坡快速施工的支护设计提供参考。 |
| Abstract: | Taking the Huangshan’ao foundation pit project (Ningbo) as a research object, this study investigated the steep and strongly weathered rock slopes through field monitoring, theoretical analysis, and ABAQUS numerical simulation to evaluate their deformation characteristics under rapid excavation. Results show that the rapid excavation stage produced most of the deformation, with its maximum horizontal and vertical displacements being approximately 6.9 mm and 7.4 mm, respectively. Prestressed anchor installation reduced displacement rates by over 90%, and the anti-slide piles exhibited a cantilever-type deformation pattern. Numerical predictions agreed well with the monitored data (errors in key parts <10%), confirming the applicability of the modified Mohr-Coulomb model. Parametric analysis revealed that increasing pile embedment, reducing pile spacing, and enlarging anchor inclination can all effectively control displacement; increasing pile length from 10 m to 16 m could reduce horizontal displacement by about 30%. The findings provide guidance for supporting the design of rapidly excavated slopes in strongly weathered rock. |
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| 备注/Memo: | 收稿日期：2025-11-21 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：浙江省自然科学基金（LY21E080007） 第一作者：董理金，高级工程师，主要研究方向为边坡工程。E-mail: 191727582@qq.com *通信作者：齐昌广，博士/副教授，主要研究方向为边坡工程。E-mail: qichangguang@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
