湿陷性黄土地基处理的优化桩型设计及工程应用  

Optimized pile-type design in collapsible loess foundation treatment and engineering applications

作　　者：张梅[1] 王奔[1] 韩高彬[1] 孟祥宝 李健[1] 

机构地区：[1]河北农业大学城乡建设学院,河北保定071000 [2]河北保定城乡建设集团有限责任公司,河北保定071000

出　　处：《河北农业大学学报》2012年第6期105-109,115,共6页Journal of Hebei Agricultural University

摘　　要：基于优化桩型的观点,将夯实水泥土桩与素土挤密桩组合处理湿陷性黄土地基,形成多桩型复合地基。该优化桩型充分发挥了主桩夯实水泥土桩及辅桩素土挤密桩的各自的工程特点。利用主控桩提高复合地基承载力及控制沉降,利用辅桩的挤密效应来消除黄土地基的湿陷性,同时辅桩亦对复合地基承载力有所提高。通过两者的优势互补,与单一桩型的处理方法相比,复合地基承载力提高20%,地基处理工程造价降低10%左右。在对太行山山区地带利用该优化桩型对湿陷性黄土地基进行处理,湿陷性黄土地基的湿陷性得到完全消除,复合地基承载力特征值及变形均满足要求,验证了该种优化桩型理论上的正确性及施工上的可行性。Based on the optimized pile viewpoint,the rammed soil-cement pile and the prime soil-compaction pile are arranged in a group as compound piles,which utilizes their merits and avoids their shortcomings.Using the main pile to promote the bearing capacity of the composite foundation,and utilize the compaction of short pile to treat the collapse loess,at the same time,the short pile also promote the composite bearing capacity.Compared with the single pile,the bearing capacity is promoted by 20%,and the engineering cost decreased by 10%.This paper introduced one engineering,which used the combined foundation,including compaction soil-cement pile and prime soil-compaction pile two kinds of optimization piles.Also,its rationality in theory and its feasibility in engineering application are verified in this paper.

关 键 词：夯实水泥土桩 素土挤密桩 组合桩型复合地基 湿陷性黄土 优化设计 

分 类 号：TU475.3[建筑科学—结构工程]