深厚软基超长大直径钻孔灌注桩承载性状试验研究-昆明理工大学学报.PDFVIP

35 4 () http: / /www. kustjourna.l com / V o.l 35 N o4 20 10 8 Journal ofK unm ing U n iversity of Science and T echnology ( Science and T echnology Aug. 20 10 do:i 10. 3969 / j. issn. 1007- 855x. 2010. 04. 011 1, 2 3 4 魏栋梁 , 杨昌正 , 谭晓琦 ( 1. , 400074; 2. , 650011; 3. , 650011; 4. , 65005 1 : 为了验证设计所取的参数是否可靠, 采用单桩静载试验方法研究深厚软基超 大直径钻 孔灌注桩的承载性状, 对不同荷载作用下桩的沉降量承载性能荷载的传递规律和桩侧摩阻力 分布规律进行了分析. 同时, 基于试验所测得的数据, 结合大理洱海地区具体土层结构性质特 点, 用有限元法对钻孔灌注桩受力性状进行仿真模拟. 研究结果表明, 桩承载能力完全能满足设 计荷载要求, 并且尚有较大的富裕承载能力. 研究成果对该地区及类似地质条件下超 大直径桩 的设计提供有益的参考. : 桥梁桩基; 深厚软基; 有限元法; 桩土相互作用; 静载试验 : TU 412 : A : 1007 - 855X ( 2010 04 - 0051- 06 Test and Research on Load Bearing Properties of uper- Long and Large- D iameter Bored- Pile in Deep oft Basement 1, 2 3 4 W E I Donglai ng , YA NG C ha ngz heng , TA N X ai oq i ( 1. Chongqing J iaotong U n iversity, Chongq ing 400074, Ch ina; 2. B roadv ision Eng ineer ing Consu ltan ts, K unm ing 650011, K unm ing 6500 11, Ch ina; 3. M unic ipal Eng inee ring Qua lity Superv isory D epartm ent o f Kunm ing, K unm ing 6500 11, Ch ina; 4. Y unnan H ighw ay Science and T echno logy R esearch Institute, K unm ing 65005 1, Ch ina Abstract: To verify the re liability o f the design param eters, sing le- p ile- stat ic- load- test is adopted to study the load bear ing properties of the super- long and large- d iam eter bored- p ile in deep soft basem ent. The study item s inc lude the subsid ing quantity, load- bearing- capab ilities, the load transferring law, and the d istr