钻孔灌注长桩桩侧摩阻力和建筑物沉降分析  

SHAFT RESISTANCES OF LONG CAST-IN-PLACE PILES AND BUILDING SETTLEMENT ANALYSIS

作　　者：杨育文[1] 罗坤[1] 

机构地区：[1]武汉市勘测设计研究院,湖北武汉430022

出　　处：《岩石力学与工程学报》2008年第6期1260-1269,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：武汉市建委科研项目(2004–21)

摘　　要：确定桩侧极限摩阻力的大小,目前工程上广泛采用的是以经验方法为主,辅以测桩数据分析,得到的结果往往存在较大的误差。按照工程先后次序,从2栋建筑物桩基场址勘察数据入手,分析桩静载荷试验资料,提出将静载曲线分成3段,确定桩侧极限摩阻力大小等新方法,并将得到的结论应用于2栋高层建筑沉降对比分析,探讨桩侧摩阻力的发展与建筑物的沉降之间的关系。新方法的合理性得到了验证。Determining the values of the shaft resistances in practice relies mainly on the empirical approaches and secondarily settlement on the pile tests. From them, the analytical results usually have considerable errors. In terms of the sequence of building construction, the site investigations for two buildings supported by pile foundations are firstly introduced, and then the pile loading tests are presented on two different sites. According to the pile loading histories, the ultimate frictional resistance of pile shafts can be determined and figured out by dividing a loadsettlement curve into three sections. The results from the pile test analysis are finally applied to the comparison of the two high-rise building settlements. The relationship between the mobilized shaft resistance and two-building settlement supported by the piles is evaluated; and the reasonableness of proposed method is validated.

关 键 词：桩基工程 极限侧摩阻力 静载试验 

分 类 号：TU47[建筑科学—结构工程]