深大基础风化岩天然地基承载力和变形分析  

Bearing capacity and deformation analysis of large and deep foundation on the weathered rock

作　　者：张平新 刘滨 吴纯 

机构地区：[1]深圳市勘察测绘院有限公司,广东深圳518028 [2]深圳市粤鹏建设监理有限公司,广东深圳518031

出　　处：《工程勘察》2018年第2期23-30,共8页Geotechnical Investigation & Surveying

摘　　要：为了校核重要设计参数,对深大基础风化岩天然地基进行了检测。通过动力触探试验和分析,指出该风化岩地基土具有分层的特点,强回弹层可明显分出渐变层及影响层。通过浅层平板载荷试验和分析,可以看出p-s曲线具有类超固结土的两阶段特征,求得的承载力特征值及变形模量仅能反映出渐变层的工程特性,指出该试验应用的局限性。利用动力触探试验成果中的分层,结合载荷试验求得的变形模量,找出了校核设计变形量的实用方法。本工程案例对高层建筑深大基础天然地基设计和施工具有一定参考价值。In order to check the important design parameters, the mechanical property of the weathered rock beneath the deep and large foundation is tested. Analyzing the dynamic penetration test, the weathered rock has the characteristics of layering as to the strong rebound area can be divided as gradual changing layer and influencing layer. Analyzing the plate loading test, the p-s curve is shown as two stages with the over consolidated soil characteristic, the characteristic value of bearing capacity and deformation modulus can only reflect the engineering properties of gradual changing layer which application is limited. A practical method to estimate the deformation is proposed by means of the layering from dynamic penetration tests and the deformation modulus obtained by plate loading test. The study could he referred by the design and construction of deep and large foundation for the high-rise buildings.

关 键 词：承载力特征值 变形模量 渐变层 载荷试验 

分 类 号：TU47[建筑科学—结构工程]