水作用下小南坡街崩塌形成的机理研究

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摘要：根据太原市阳曲县小南坡街崩塌的基本特征和变形趋势，研究水作用下的黄土崩塌变形破坏模式和形成机理。通过数值模拟可知，小南坡街黄土坡体首先在边坡坡脚处发生塑性变形，且坡体顶部裂隙不断发育，二者贯通后引发垮塌。

关键词：小南坡街；水的作用；黄土崩塌

中图分类号：P642.22 文献标识码：A 文章编号：1008-9500（2024）11-0094-03

Study on the Mechanism of the Collapse on Xiaonanpo Street under the Action of Water

ZHANG Qiang1， ZHANG Lei2， TIAN Wenbin3， FU Rong1

（1. Beijing Institute of Geotechnical Engineering Investigation and Survey Co.， Ltd.， Beijing 100190， China;

2. Second Geological Survey Institute of Jilin Province， Jilin 132013， China; 3. Shanxi Agricultural University， Jinzhong 030899， China）

Abstract： Based on the basic characteristics and deformation trends of the Xiaonanpo Street collapse in Yangqu county， Taiyuan city， this study investigates the deformation and failure modes and formation mechanisms of loess collapse under water action. Through numerical simulation， it can be concluded that the loess slope of Xiaonanpo Street first undergoes plastic deformation at the foot of the slope， and cracks continue to develop at the top of the slope， leading to collapse after the two connect.

Keywords： Xiaonanpo Street; the action of water; loess collapse

近年来，在山西省太原市北部的阳曲县附近，杨兴河南岸约2 km长的区域内共发生18次崩塌，垮塌总方量达到120×104 m3，造成周边260多间民房开裂损坏，致使上千人无家可归，直接经济损失超过3 500万元。（剩余3420字）