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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2022, Vol. 41 ›› Issue (05): 118-126.DOI: 10.3969/j.issn.1674-0696.2022.05.16

• 交通基础设施工程 • 上一篇    下一篇

水位升降与降雨耦合作用下库岸边坡稳定性分析

曾润忠1，谢典1,2，祝俊华1，罗伟1，赵秀绍1   

  1. (1. 华东交通大学 江西省地下空间技术开发工程研究中心，江西 南昌 330000； 2. 江西省交通设计研究院有限责任公司，江西 南昌 330013)
  • 收稿日期:2020-07-21 修回日期:2022-04-05 发布日期:2022-05-26
  • 作者简介:曾润忠（1968—），男，江西鹰潭人，教授，主要从事铁路路基施工及变形控制技术、边坡灾害及防治技术研究。E-mail：526642936@qq.com 通信作者：谢典（1995—），男，江西九江人，硕士研究生，主要从事边坡稳定性分析方面研究。E-mail：2538512143@qq.com
  • 基金资助:
    国家自然科学基金项目（51668018）；江西省交通运输厅科技项目（2016C0004，2020Z0001）；江西省自然科学基金项目（20202BABL204067）

Stability Analysis of Reservoir Bank Slope under the Coupling Action of Water Level Fluctuation and Rainfall

ZENG Runzhong1, XIE Dian1,2, ZHU Junhua1, LUO Wei1, ZHAO Xiushao1   

  1. (1. Jiangxi Underground Space Technology Development Engineering Research Center, East China Jiaotong University, Nanchang 330000, Jiangxi, China; 2. Jiangxi Transportation Design and Research Institute Co., Ltd., Nanchang 330013, Jiangxi, China)
  • Received:2020-07-21 Revised:2022-04-05 Published:2022-05-26

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摘要： 为了研究降雨与库水位涨落2种因素耦合作用下非饱和复杂土质库岸边坡的渗流与稳定性问题，基于ABAQUS软件建立了含砂层边坡计算模型；研究了在降雨强度分别为48.0、72.0、100.8 mm/d，库水位升/降速率分别为0.5、1.0、1.5 m/d条件下，库岸边坡的渗流场特性和稳定性。结果表明：单因素影响下，降雨强度越大或水位下降速率越大，库岸边坡稳定性越差；降雨与蓄水（库水位上升）耦合作用下，降雨强度及蓄水对库岸边坡稳定性的影响相对较小；降雨与库水位下降耦合作用下，水位下降是引起库岸边坡稳定性快速下降的主导因素，且库岸边坡稳定性随着降雨强度的增大而降低；渗透力的作用促进了含砂层边坡坡体塑性区的贯通，极大地削弱了库岸边坡稳定性。

关键词: 港口航道工程；含砂层边坡；渗流场；稳定性分析；非饱和土

Abstract: In order to study the seepage and stability of unsaturated complex soil reservoir bank slope under the combined action of rainfall and reservoir water level fluctuation, a calculation model of sand bearing slope was established based on ABAQUS software. Under the conditions of rainfall intensity of 48.0, 72.0 and 100.8 mm/d and reservoir water level fluctuation rate of 0.5, 1.0 and 1.5 m/d, the seepage field characteristics and stability of reservoir bank slope were analyzed. The results show that under the influence of single factor, the greater the rainfall intensity or the water level falling rate, the worse the stability of the reservoir bank slope. Under coupling action of rainfall and water storage (rise of reservoir water level), rainfall intensity and water storage have relatively little impact on the stability of reservoir bank slope. Under coupling action of rainfall and reservoir water level drop, the water level drop is the dominant factor causing the rapid decline of reservoir bank slope stability, and the reservoir bank slope stability decreases with the increase of rainfall intensity. The effect of seepage force promotes the connection of the plastic zone of the sand bearing slope and greatly weakens the stability of the reservoir bank slope.

Key words: port and waterway engineering; sand-bearing slope; seepage field; stability analysis; unsaturated soil

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