昔格达软岩中灌注桩单桩竖向承载力试验研究  

Field Experimental Research on Bearing Capacity of Cast-in-Situ Piles in Xigeda-Rock

作　　者：吴兴序[1] 庄卫林[2] 吉随旺[2] 熊国斌[3] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]四川省交通厅公路规划勘察设计研究院,四川成都610041 [3]四川攀西高速公路开发股份有限公司,四川成都610041

出　　处：《西南交通大学学报》2006年第6期669-674,共6页Journal of Southwest Jiaotong University

基　　金：交通部西部交通建设科技项目(2003-318-800-55)

摘　　要：为向建设中的西昌—攀枝花高速公路桥梁桩基础设计提供参考(该高速公路沿线约90 km路段通过岩性软弱、遇水易泥化和崩解的昔格达岩层),在攀枝花地区新九和安宁河流域德昌蒲坝的昔格达岩层中对13根灌注桩进行了单桩轴向静载试验,研究了桩的承载力和影响承载力的因素.结果表明,昔格达岩层可以作为桩基础的持力层,但应保证桩的施工质量.To provide a reference for the design of pile foundations of bridges on the Xichang- Panzhihua expressway being constructed, the static loading tests and researches on the axial bearing capacity of 13 cast-in-situ piles set in Xigeda-rock were carried out at Xinjiu in Panzhihua and at Puba in Dechang. Xigeda-rock is an extremely soft rock with the special behaviors of softening, mashing and collapsing due to water, and this kind of rock abounds in a region as long as 90 km along this expressway. The experimental and research results show that Xigeda-rock can be used as the ground of pile foundations, and the construction quality is extremely important to their bearing capacity.

关 键 词：昔格达岩层 软岩 灌注桩 静载试验 承载力 

分 类 号：TU473[建筑科学—结构工程]