模型支盘桩的试验研究  

Test study of model piles with branches and plates

作　　者：卢成原[1] 孟凡丽[1] 王龙[1] 

机构地区：[1]浙江工业大学建工学院,浙江杭州310032

出　　处：《岩土力学》2004年第11期1809-1813,共5页Rock and Soil Mechanics

基　　金：浙江省自然科学基金项目(No.502117)资助.

摘　　要：设计了一个室内模型试验装置,来研究支盘桩的承载和变形性能以及影响因素。通过其与等直径模型桩的对比试验,证明了支盘桩在承载能力和抗沉降变形上的优越性,证实了由于盘顶临空面的存在使盘顶一定范围的土体对桩的侧阻很小,另外。盘底土体由于与盘一起产生变形,在紧邻盘底的位置甚至可能产生负摩擦作用,因此在盘距较小时两盘之间的土体对桩的侧阻几乎可以忽略,设计时应给予充分重视。A model test equipment had designed to go into bearing property and other influence factors about the piles with branches and plates. In contrast to the equivalent-diameter mode pile, it can be proved that there are many advantages about pile with branches and plates in bearing property and anti-settlement deformation. The test also proves that soil above the plates in some ranges gets a little side-resistance due to the existing of air face between plates and soil. In addition, because the soil under plates bring deformation together with the plates, there will be negative friction close to the bottom of plates. So it can be ignored that the side-resistance of the soil between two plates with small plate-distance against the piles. We should make great attention about it.

关 键 词：支盘桩 模型试验 挤密效应 临空面 

分 类 号：TU473.1[建筑科学—结构工程]