花岗岩残积层滑坡形成机理降雨模拟研究. . (Chinese)
In: Science Technology & Engineering, Jg. 22 (2022-06-22), Heft 18, S. 7799-7809
academicJournal
Zugriff:
Granite residual soil is a kind of special soil, which is easy to induce geological disasters under the condition of heavy rainfall. Taking the mass landslides in Beiling area, Longchuan County, Guangdong Province as the background, the formation mechanism of typical landslides was explored by means of physical simulation. The results show as follows. The influencing factors of landslides are rainfall intensity, physical and mechanical properties of rock and soil mass, slope structure. Rainfall did not cause the abnormal increase or decrease of soil pressure and pore water pressure in the slope, indicating that the failure of the slope was limited to the local failure of the slope surface and the slope toe, and there was no overall deformation and failure trend. On the surface of the slope, the slope was eroded by rainfall, and on the foot of the slope, the free surface collapses and undergoes erosion. On the whole, the slope showed the characteristics of “step by step retreat and damage in turn”. The evolutionary process of landslide could be divided into the following four stages: original slope evolution stage, soil particle migration stage, slope surface local failure stage and overall instability stage. [ABSTRACT FROM AUTHOR]
花岗岩残积土是一种特殊土,在强降雨条件下极易诱发地质灾害。以广东省龙川县贝岭地区群发性滑坡为背景,采 用物理模拟手段探究了典型滑坡的形成机理,结果表明:滑坡发生的影响因素为降雨强度、岩土体物理力学性质、斜坡结构; 降雨并未引起坡体内部土压力及孔隙水压力数值出现异常增减,说明坡体破坏仅限与坡表及坡脚局部的破坏,未有整体变形 破坏趋势;斜坡变形破坏在坡表表现为降雨造成的坡面侵蚀,坡脚表现为临空面的垮塌及潜蚀现象,总体上表现出“ 逐级后 退、依次破坏”破坏特征;滑坡的演化过程可划分为以下4 个阶段:原始斜坡演化阶段、土壤颗粒运移阶段、坡表局部破坏阶 段、整体失稳阶段。 [ABSTRACT FROM AUTHOR]
Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
花岗岩残积层滑坡形成机理降雨模拟研究. . (Chinese)
|
---|---|
Autor/in / Beteiligte Person: | 冯文凯 ; 胡芮 ; 白慧林 ; 吴义鹰 ; 代洪川 |
Zeitschrift: | Science Technology & Engineering, Jg. 22 (2022-06-22), Heft 18, S. 7799-7809 |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 1671-1815 (print) |
Sonstiges: |
|