自重湿陷性黄土场地双向螺旋桩复合地基承载能力试验研究  

SDS Pile Composite Foundation with Self-Weight Collapsible Loess Site Carrying Capacity Test Study

作　　者：王兆辉 陈天镭 吴健[2] 蔡明喜 柴清 WANG Zhao-hui;CHEN Tian-lei;WU Jian;CAI Ming-xi;CHAI Qing(Lanzhou Engineering&Research Institute of Nonferrous Metallurgy Co.Ltd.,Lanzhou 730000,China;Gansu Civil Engineering Research Institute Co.Ltd.,Lanzhou 730000,China)

机构地区：[1]兰州有色冶金设计研究院有限公司,甘肃兰州730000 [2]甘肃土木工程科学研究院,甘肃兰州730000

出　　处：《甘肃冶金》2020年第3期72-75,共4页Gansu Metallurgy

基　　金：甘肃省科技计划资助(18YF1GA055)。

摘　　要：通过现场试验,分别研究在不同桩间距下,经过挤密处理后大厚度湿陷性黄土地基中桩间土的物理力学指标、非排土双向螺旋素土挤密桩(柔性桩)复合地基承载力特征值、非排土双向螺旋素混凝土挤密桩(刚性桩)复合地基承载力特征值,确定双向螺旋挤土桩技术在处理大厚度湿陷性黄土地基具有技术先进、稳定可靠的特点,同时具有一定的环保优势。Through the field test,the physical and mechanical indexes of the soil between piles in the large-thickness collapsible loess foundation and the non-dumping bidirectional spiral soil compacted piles(flexible piles)are studied under different pile spacings.The characteristic value of foundation bearing capacity and the bearing capacity of composite foundation of non-dumping bidirectional spiral plain concrete compacted pile(rigid pile),and the technical treatment of bidirectional spiral compaction pile is technically advanced,stable and reliable in large thickness collapsible loess foundation.Features,while having a certain environmental advantages.

关 键 词：湿陷性黄土 双向螺旋挤土桩 复合地基 

分 类 号：TU473.1[建筑科学—结构工程]