摘要
为了研究斜坡条件下卸载后的土体变形,用0.5~1.0 mm的熔融石英砂和正十二烷与食品级15#白油的混合液体配置出具有砂土特性的透明土。在透明土模型的基础上对坡度为30°的斜坡进行试验,通过图像采集系统和软件进行辅助分析,从而得到卸载后土体的位移矢量图和位移归一化等值线图。结果表明:在卸载之后,土样深处的土体应力变化不大,变形位移围绕0 mm上下波动;土体表面6 cm以下区域在卸载之后的位移并不大,但水平断面1 cm和水平断面3 cm处的土体水平位移在加载平台周围的波动幅度较大;卸载后土体水平位移恢复值较小,且集中在加载平台周围;加载平台周围土体的竖向位移较大。
In order to study the soil deformation after unloading under slope conditions,a transparent soil with sand characteristics was configured with a mixture of 0.5-1.0 mm fused silica sand,n-dodecane and 15#white oil.On the basis of the transparent soil model,the slope with a slope of 30°was tested,and the image acquisition system and software were used for auxiliary analysis to obtain the displacement vector diagram and the displacement normalized contour map of the soil after unloading.The test results show that after unloading,the soil stress in the depth of the soil sample did not change much,and the deformation displacement fluctuates was around 0 mm.The displacement of the region below 6 cm from the soil surface was not large after unloading,but the horizontal displacement of soil at 1 cm and 3 cm of horizontal section fluctuated greatly around the loading platform.After unloading,the recovery value of the horizontal displacement of the soil was small and concentrated around the loading platform,while the vertical displacement of the soil around the loading platform was relatively larger.
作者
张建伟
丁乐
樊亚龙
边汉亮
ZHANG Jianwei;DING Le;FAN Yalong;BIAN Hanliang(School of Civil Engineering and Architecture, Henan University, Kaifeng, Henan 475004, China;Henan Provincial Research Center of Engineering on Intelligent Construction of Rail Transit, Kaifeng, Henan 475004, China)
出处
《中国科技论文》
CAS
北大核心
2022年第2期127-132,140,共7页
China Sciencepaper
基金
国家自然科学基金资助项目(51508163)
河南省科技厅科技攻关重点项目(192102310226)
河南省高等学校青年骨干教师培养计划项目(2019GGJS041)。
关键词
透明土
模型试验
斜坡
图像采集系统
土体变形
transparent soil
model test
slope
image acquisition system
soil deformation
