载体桩在陕南粉质黏土地区的适用性研究
摘要:以陕南粉质黏土地区某住宅楼施工现场为试验场地，开展了灌注桩和载体桩复合地基的现场静载试验，结合经验法理论计算，从承载力和建设成本两个方面，对比分析了两种地基基础方案的优劣。结果显示：灌注桩和载体桩复合地基荷载--沉降曲线均为缓变型，两种方案均能提供较高的抗压承载力; 当载体桩桩长超过10 m，且作为复合地基增强体时，经验法计算过程未考虑桩端阻力的扩大头效益，计算结果明显低于现场试验结果; 在相同桩身用料投入条件下，载体桩复合地基较灌注桩能够提供更高承载力。在陕南的类似粉质黏土地区，建议优先考虑选用载体桩复合地基方案。
Abstract:The static load test of cast-in-place pile and carrier pile composite foundation was carried out on a residential construction site of silty clay in southern of shaanxi province.Combined with the theoretical calculation of empirical method,this paper compares and analyzes the advantages and disadvantages of the two schemes from bearing capacity and construction cost.The results show that the load-settlement curve of the two schemes also belongs to the slowly variation curve,indicating that both schemes can provide higher bearing capacity; When the length of the carrier pile is longer than 10 m and is used as the reinforcement of composite foundation,the expanded head benefit of pile tip resistance is not considered in the calculation process of empirical method,and the calculation result is obviously lower than the field test result.Under the same construction cost,the composite foundation of the support pile can provide higher bearing capacity than the cast-in-place pile.In the similar silty clay area of southern shaanxi,it is suggested that the composite foundation scheme of support pile should be taken priority.
中文标题：
载体桩在陕南粉质黏土地区的适用性研究
Study on Bearing Capacity of Cast-in-place Pile in Silty Clay Area of Southern Shaanxi Province
作者：
王建安1,张慧海1,陈琳2,任猛涛1,张旭升1
Wang Jianan1,Zhang Huihai1,Chen Lin2,Ren Mengtao1,Zhang Xusheng1
作者简介:王建安，男，1980年生，汉族，陕西安康人，大学本科，高级工程师，主要从事岩土工程施工技术研究。E-mail：14185385@qq.com
通讯地址：
1. 机械工业勘察设计研究院有限公司, 陕西西安 710043; 2. 陕西省安康市兴华建设集团房地产开发公司, 陕西安康 725099
1.ChinaJKInstituteofEngineeringInvestigationandDesignCo.,Ltd.,Xi'an710043,Shaanxi,China; 2.ShaanxiAnkangCityXinghuaConstructionGroupRealEstateDevelopmentCo.,Ltd.,Ankang725099,shaanxi,China
中图分类号:TU413
doi:10.3969/j.issn.1007-2993.2019.02.012
出版物：岩土工程技术
收稿日期:2018-12-24
网络出版日期:2021-07-06
关键词:粉质黏土,载体桩,钻孔灌注桩,静载荷试验,经验公式法
Key words:silty clay,carrier pile,bored pile,static load test,empirical formula method
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基金项目：
基金项目: 陕西省科技统筹创新工程计划(S2016TNSF0056)
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