黄土地质新型螺旋地锚桩试验研究  

Experimental research on new type of spiral ground anchor piles in loess soil

作　　者：吕少锋[1] 刘飞鹏[1] 谢艳丽[1] 李红星[1] 杨伟 刘学军[1] 冯世进[2] LV Shaofeng;LIU Feipeng;XIE Yanli;LI Hongxing;YANG Wei;LIU Xuejun;FENG Shijin(Northwest Electric Power Design Institute Co.,Ltd.,Xi'an 710075,Shaanxi,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]西北电力设计院有限公司,陕西西安710075 [2]同济大学土木工程学院,上海200092

出　　处：《工程建设》2021年第11期13-20,共8页Engineering Construction

摘　　要：螺旋地锚桩是一种较为适宜的光伏支架基础方案,为得到黄土地质的螺旋地锚桩计算参数,用于指导光伏螺旋地锚桩基础的设计及优化。本文提出两种新型螺旋地锚桩,桩型分别为连续螺纹钻头式桩端与单叶片、双叶片螺旋锚的组合形式;通过对黄土地质条件下的两种新型螺旋地锚桩进行现场试验研究,得到新桩型的承载力及其受力机制,分析相关参数对螺旋地锚桩受力性能的影响,基于试验结果对黄土地质新型螺旋地锚桩工程应用提出建议。两种桩型的承压性能均优于抗拔性能,桩型I的抗拔、承压及水平承载力均小于桩型II,叶片数量对螺旋地锚桩承载力的影响较大。Spiral ground anchor piles is a more suitable foundation solution for PV supports.In order to get the calculation parameters of spiral ground anchor piles for loess soil,which is used to guide the design and optimization of PV spiral ground anchor piles foundation.Two new types of spiral ground anchor piles are proposed,and the pile types are the combination form of continuous threaded auger type pile end and single-blade and double-blade spiral anchor respectively;through the field test research of two new types of spiral ground anchor piles under loess soil condition,the bearing capacity of the new pile types and their force mechanism are obtained,the influence of relevant parameters on the force performance of spiral ground anchor piles is analyzed,and based on the test results,a proposal on engineering application of new spiral ground anchor piles for loess soil is offered.The compression properties of both pile types are better than the pullout resistance.The pullout resistance,compression and horizontal bearing capacity of pile type I is smaller than that of pile type II,and the number of blades has a greater influence on the bearing capacity of spiral ground anchor piles.

关 键 词：黄土土质 光伏 螺旋地锚桩 抗拔 承压 水平受荷 承载力 应力 

分 类 号：TU476[建筑科学—结构工程]