摘要
基于相似理论,在1 200mm×1 200mm×1 000mm的模型框架中设计制作了微型桩加固滑坡模型.选用从陕南地区采集的膨胀土为滑体材料,在滑面以上微型桩前不同深度处,埋设土压力盒,测量滑坡形成过程中土压力,对土拱效应进行了研究.结果表明:降雨阶段的土拱效应较弱;随着土深的增加,微型桩前土拱压力增大;桩间距增大,桩前土拱效应逐渐减弱.最佳土拱效应时,桩间距为(8～10)d(d为桩径).
Based on the similarity theory,the model of mini-pile reinforcement of landslide is made in a 1 200 mm×1 200 mm×1 000 mm frame.The material of landslide is expansive soil which is collected from Southern Shaanxi.The earth pressure cells are buried in front of the pile group at different depths to measure the pressure of the soil arch in the process of forming landslide.The findings go as follows： The soil arch effect is weak in the rainfall stages;the arch pressure in front of the mini-piles grows with depth increasing;with increase of pile spacing,the soil arch effect in front of the piles is gradually weakened.In order to achieve the best soil arching effect,pile spacing should be in（8~10） d（d is the pile diameter）.
出处
《西安工业大学学报》
CAS
2013年第4期297-302,共6页
Journal of Xi’an Technological University
基金
陕西省自然科学基金项目(2012JM5008)
关键词
微型桩
堆积层滑坡
模型试验
土拱效应
mini-pile
accumulation layer landslide
modle test
soil arch effect
