基于上下部共同作的用柔性基础下复合地基性状研究.docVIP

基于上下部共同作用的?柔性基础下复合地基性?状研究 俞建霖1，荆?子菁1，龚晓南1，刘? 超1，2，吕文志?1，3 (1.浙江大?学软弱土与环境土工教?育部重点实验室，浙江? 杭州 310027?；2.山东电力工程咨?询院，山东 济南 2?50013； 3.长?江科学院水利部岩土力?学与工程重点实验室，?湖北 武汉43001?0) 摘 要：根据?路堤荷载下复合地基的?变形特征，将柔性基础?下复合地基分解为填土?、垫层、复合地基、下?卧层土体4部分。将4?者作为一个共同作用的?系统，假设桩土界面之?间存在相对滑移且同一?水平面上地基土沉降不?同，考虑系统4部分交?界面上的应力与变形协?调，通过对典型单元体?的分析，推导了表征柔?性基础下复合地基性状?的桩土应力比和沉降变?形的求解公式。最后将?工程实测结果和本文方?法分析的结果进行对比?，二者基本一致，说明?本文方法能较好反映柔?性基础下复合地基的工?作性状。 关键词：柔?性基础下复合地基；解?析解；荷载传递；相对?滑移 中图分类号：T?U47 ?文献标识码：A ? 文章编号：1?000–4548(2?010)05–065?7–07 作者简介：?俞建霖(1972– ?)，男，福建福清人，?博士，副教授，硕士生?导师，主要从事软黏土?力学、地基处理及基坑?工程等方面的研究与教?学工作。E-mail?: yujianli?n72@126.co?m。 Working? behaviors? of compos?ite ground? under fle?xible foun?dation bas?ed on ? ? super-?sub struct?ure intera?ction YU J?ian-lin1, ?JING Zi-ji?ng1, GONG ?Xiao-nan1,? LIU Chao1?, 2, Lü We?n-zhi1，3 (?1. Key Lab?oratory of? Soft Soil?s and Geoe?nvironment?al Enginee?ring of Mi?nistry of ?Education,? Zhejiang ?University?, Hangzhou? 310027, C?hina; 2. S?handong El?ectric Pow?er Enginee?ring Consu?lting Inst?itute, Jin?an 250013,? China; 3.? MWR Key L?aboratory ?of Geotech?nic Mechan?ics and En?gineering,? Yangtz Ri?ver Scient?ific Resea?rch Instit?ute, Wuhan? 430010, C?hina) Abst?ract: Base?d on the d?eformation? character?istics of ?composite ?ground und?er the fle?xible foun?dation, th?e composit?e ground i?s divided ?into four ?parts, inc?luding fil?l, cushion?, composit?e foundati?on, and un?derlying l?ayer. Thro?ugh the an?alysis of ?a typical ?element, a? simplifie?d analytic?al model, ?which cons?iders the ?above four? parts as ?an interac?tive syste?m, allows ?for the re?lative mov?ement betw?een piles ?and soils ?and assume?s differen?t settleme?nts of fou?ndation so?il at the ?same level? plane, is? presented?. And then? according? to the co?mpatibilit?y of stres?s and defo?rmation on? the inter?faces betw?een these ?four compo?nents, the? formulas ?on settlem?ent and st?ress ratio? of pile-s?oil, which? is used t?o characte?rize the