摘要
随着高层建筑的日益增多,很多复合地基存在边载效应,边载效应下的桩土受力性质,是目前需要解决的一个重要课题。利用大型试验台———中国矿业大学城市地下工程相似模拟试验系统,进行了10组模型试验。试验分析了有边载情况下荷载、桩长、褥垫层厚度、加固区土体模量及边载水平对复合地基桩土应力比的影响,并根据试验数据经线性回归得到桩土应力比的经验公式。该公式与模型试验数据相比较达到较高的精度,可以直接应用于工程设计。
With the increasing number of high-rise buildings, there is side load effect in most composite foundation,pile-soil mechanics properties of composite foundation with side load effect is a important qusetion. 10 model experiments are conducted by similar simulation experiment system of urban underground engineering in China University of Mining ＆ Technology, Beijing Campus. This paper study pile-soil stress ratio in side loads composite foundation with different loads, pile length, reinforced field soil modulus, cushion thickness and grade of side loads. The experience formula of pile-soil stress ratio is regressed on the basis of the model experiments data. It is contrasted to result of the engineering case in Tangshan,it show good agreement to result of engineering case. So it can be employed for engineering design.
出处
《四川建筑科学研究》
北大核心
2011年第6期147-149,共3页
Sichuan Building Science
关键词
复合地基
桩土应力比
模型试验
边载
composite foundation
pile-soil stress ratio
model experiment
side loads
