摘要
【目的】研究滑带土强度特性问题。【方法】以三门峡槐扒滑坡滑带土为例,不仅对滑带土做了基本物理试验分析,而且使用德国wille环剪仪对滑带土的重塑样开展了在恒定剪切速率0.2 mm/min下,不同垂直压力(100 kPa、200 kPa、300 kPa、400 kPa)不同含水率(12%,15%,18%,21%,24%)条件下的环剪试验。【结果】滑带土残余强度会随着含水率的增大而减小,在低含水率时呈现“应变软化”现象,残余强度有所减小;高含水率时呈现“应变硬化”现象,残余强度有所增加。含水率相同时,滑带土的残余强度会随着垂直压力的增大而增大。【结论】为三门峡的滑坡防治提供理论依据。
[Purposes]To study the strength characteristics of sliding zone soil.[Methods]In this study,the sliding zone soil of Huaiba landslide in Sanmenxia was taken as an example.Not only the basic physical test analysis of the sliding zone soil was carried out,but also the ring shear test under different vertical pressures(100 kPa,200 kPa,300 kPa,400 kPa)and different water contents(12%,15%,18%,21%,24%)at a constant shear rate of 0.2 mm/min was carried out by using the German Wille ring shear apparatus.[Findings]The residual strength of sliding zone soil decreases with the increase of water content,and presents the phenomenon of'strain softening'at low water content,and the residual strength decreases.When the water content is high,the'strain hardening'phenomenon appears,and the residual strength increases.When the water content is the same,the residual strength of the sliding soil will increase with the increase of the vertical pressure.[Conclusions]The study provides theoretical basis for landslide prevention and control in Sanmenxia.
作者
徐启翔
董金玉
董文萍
杨兴隆
DONG Jinyu;XU Qixiang;DONG Wenping;YANG Xinglong(School of Earth Science and Engineering,North China University of Water Resources and Hydropower,Zhengzhou 450056,China)
出处
《河南科技》
2023年第7期112-117,共6页
Henan Science and Technology
关键词
滑带土
环剪试验
残余强度
应变软化
应变硬化
sliding zone soil
ring shear test
residual strength
strain softening
strain hardening
作者简介
徐启翔(1995-),男,硕士生,研究方向:岩土工程。
