静压托换桩在某湿陷性黄土场地 地基加固中的应用
摘要:针对某试验楼沉降较大的问题,通过调查裂缝分布和分析沉降观测的变化规律,得出造成该建筑基础沉降和差异沉降的主要原因,即地表渗水、地下水位较明显抬升和临近建筑物的地基下沉。为解决不均匀的湿陷变形造成地基差异沉降问题,提出采用坑式静压托换桩方案进行地基加固处理,并详细介绍了加固设计方案及施工工艺。通过对比加固前后的沉降观测结果,表明采用坑式静压托换桩加固效果较好,可有效遏制湿陷性黄土场地地基不均匀沉降持续发展势态,为类似加固工程积累了地区经验。
Abstract:Focusing on the problem of large settlement of a test building, the main reasons for the foundation settlement and differential settlement are obtained through investigation of crack distribution and analysis of the observed settlement variation. The surface water seepage, the obvious rising groundwater level and the foundation settlement of adjacent buildings are the main reasons. In order to solve the problem of differential settlement of foundation caused by uneven collapsible deformation, a pit-type static pressure underpinned pile scheme was proposed to carry out the foundation reinforcement treatment, and the reinforcement design scheme and construction technology were introduced in detail. By comparing the settlement observation results before and after reinforcement, it shows that the pit-type static pressure underpinned pile has better reinforcement effect, which can effectively restrain the uneven foundation settlement of the collapsible loess site, and accumulate regional experience for similar reinforcement projects.
中文标题：
静压托换桩在某湿陷性黄土场地 地基加固中的应用
Application of Static Pressure Underpinned Piles in Foundation Reinforcement of a Collapsible Loess Site
作者：
张小辉1,刘海亭2,何淼2,吴琦2,魏国良3
Zhang Xiaohui1,Liu Haiting2,He Miao2,Wu Qi2,Wei Guoliang3
作者简介:张小辉,男,1987年生,安徽阜阳人,硕士,工程师,主要从事岩土工程勘察、设计等工作。E-mail:295069134@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. 中国有色金属工业西安勘察设计研究院有限公司, 陕西西安 710054; 3. 陕西华电蒲城发电有限责任公司, 陕西渭南 715501
1.ChinaJIKANResearchInstituteofEngineeringInvestigationsandDesignCo.,Ltd.,Xi'an710043,Shaanxi,China; 2.ChinaNonferrousMetalIndustryXi'anSurveyDesignandResearchInstituteCo.,Ltd.,Xi'an710054,Shaanxi,China; 3.ShaanxiHuadianPuchengPowerGenerationCo.,Ltd.,Weinan715501,Shaanxi,China
中图分类号:P632
doi:10.3969/j.issn.1007-2993.2019.06.006
出版物：岩土工程技术
收稿日期:2019-09-06
网络出版日期:2021-07-06
关键词:裂缝,差异沉降,湿陷性黄土,静压托换桩
Key words:crack,differential settlement,collapsible loess,static pressure underpinned pile
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