[1]冯天阔,李勇泉,李国维,等.梅州地区极端风雨条件下风化花岗岩收陡边坡稳定性分析*[J].中国安全生产科学技术,2025,21(9):77-84.[doi:10.11731/j.issn.1673-193x.2025.09.010]
FENG Tiankuo,LI Yongquan,LI Guowei,et al.Stability analysis of weathered granite steep slopes in Meizhou area under extreme wind and rain conditions[J].Journal of Safety Science and Technology,2025,21(9):77-84.[doi:10.11731/j.issn.1673-193x.2025.09.010]
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梅州地区极端风雨条件下风化花岗岩收陡边坡稳定性分析*
FENG Tiankuo,LI Yongquan,LI Guowei,et al.Stability analysis of weathered granite steep slopes in Meizhou area under extreme wind and rain conditions[J].Journal of Safety Science and Technology,2025,21(9):77-84.[doi:10.11731/j.issn.1673-193x.2025.09.010]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 21
- 期数:
- 2025年9期
- 页码:
- 77-84
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2025-09-30
文章信息/Info
- Title:
- Stability analysis of weathered granite steep slopes in Meizhou area under extreme wind and rain conditions
- 文章编号:
- 1673-193X(2025)-09-0077-08
- Keywords:
- steep slope; wind load; rainfall; numerical simulation; slope stability
- 分类号:
- X936
- 文献标志码:
- A
- 摘要:
- 为研究高速公路改扩建工程中收陡边坡受降雨和风荷载影响下的稳定性问题，以梅汕高速公路风化花岗岩路堑边坡为研究对象，根据实际现场工程并采用ABAQUS有限元软件与MATLAB风荷载模拟技术，建立考虑非饱和渗流与风-雨-土多场耦合作用的数值模型，系统分析不同降雨强度（150，200和250 mm/d）及风荷载对边坡变形机制与稳定性的影响。通过强度折减法计算安全系数，并结合现场测斜监测数据验证模型可靠性。研究结果表明：降雨入渗是边坡失稳的主导因素，孔隙水压力升高直接削弱土体抗剪强度；风荷载通过桩基传递水平推力，加剧浅层土体位移；预应力锚索通过主动约束效应显著抑制坡体变形，锚索轴力受降雨与风荷载影响显著，且下级边坡锚索对降雨敏感性高于上级边坡。研究结果可为类似地质条件下边坡稳定性的预测、防护与评价提供参考。
- Abstract:
- In order to investigate the stability of steep slopes under rainfall and wind loads during highway reconstruction and expansion projects,this study focuses on a weathered granite cutting slope along the Meizhou-Shantou Expressway.Based on actual field engineering conditions,a numerical model incorporating unsaturated seepage and wind-rain-soil multi-field coupling was developed using ABAQUS finite element software and MATLAB-based wind load simulation technology.The model systematically analyzes the effects of different rainfall intensities (150,200,and 250 mm/d) and wind loads on slope deformation mechanisms and stability.The safety factor was calculated using the strength reduction method,and model reliability was validated against field inclinometer monitoring data.The results indicate that rainfall infiltration is the dominant factor triggering slope instability,as increased pore water pressure directly reduces soil shear strength.Wind loads transmit horizontal thrust through pile foundations,exacerbating the displacement of shallow soil layers.Prestressed anchor cables significantly suppress slope deformation through active constraint effects,with their axial forces being highly sensitive to rainfall and wind loads.Notably,anchor cables in lower slope subgrades exhibit greater sensitivity to rainfall than those in upper slopes.These findings provide valuable references for predicting,protecting,and evaluating slope stability under similar geological conditions.
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相似文献/References:
备注/Memo
- 备注/Memo:
-
收稿日期： 2025-05-28
* 基金项目： 国家自然科学基金项目（42177126）；广东省交通集团有限公司科技项目(JT2022YB25)
作者简介： 冯天阔，硕士研究生，主要研究方向为边坡稳定性和数值模拟。
通信作者： 周洋，博士，副教授，主要研究方向为地下仓储空间、软土固结、高速改扩建等。
