摘要
通过对二道内支撑加地下连续墙支护结构进行室内模型试验,模拟深基坑支护结构施工与开挖过程,通过量测试验中每一工况下模型支护结构上的土压力,分析内支撑式支护结构在基坑开挖中土压力分布形态的变化规律.模型试验结果显示二道内支撑式支护结构的主动区土压力基本上均大于朗肯主动土压力.在基坑上部,试验值与静止土压力较为接近,甚至超过静止土压力;在基坑中、下部以及坑底以下,土压力介于主动土压力与静止土压力之间.采用太沙基—佩克土压力包络图计算内支撑支护结构的墙后土压力是偏于安全的.
Through laboratory model test of the two inner supporting and underground continuous wall,the deep foundation pit construction and excavation process were simulated.By inspection of each volume of the test conditions supporting structure on the model of earth pressure,the change in the earth stress distribution patterns of the two inner supporting was analyzed.Model test s results showed that active stress of supporting structure with two inner supporting was all greater than Rankine active earth pressure. Experimental data were closer to with the static stress at the upper part of foundation, even larger than static earth pressure; while it was between the range of active earth pressure and the static earth pressure in, at the lower part of and below the bottom of the pit. The calculation of earth stress on the supporting structure using of Terzaghi - Peck earth pressure envelope diagram supporting is safer.
出处
《浙江工业大学学报》
CAS
北大核心
2009年第6期694-698,共5页
Journal of Zhejiang University of Technology
关键词
支护结构
模型试验
土压力分布
retaining structure
model test
distribution of earth pressure
