水作用下小南坡街崩塌形成的機(jī)理研究

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摘要：根據(jù)太原市陽曲縣小南坡街崩塌的基本特征和變形趨勢(shì)，研究水作用下的黃土崩塌變形破壞模式和形成機(jī)理。通過數(shù)值模擬可知，小南坡街黃土坡體首先在邊坡坡腳處發(fā)生塑性變形，且坡體頂部裂隙不斷發(fā)育，二者貫通后引發(fā)垮塌。

關(guān)鍵詞：小南坡街；水的作用；黃土崩塌

中圖分類號(hào)：P642.22 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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

近年來，在山西省太原市北部的陽曲縣附近，楊興河南岸約2 km長的區(qū)域內(nèi)共發(fā)生18次崩塌，垮塌總方量達(dá)到120×104 m3，造成周邊260多間民房開裂損壞，致使上千人無家可歸，直接經(jīng)濟(jì)損失超過3 500萬元。（剩余3420字）