一种预填混合料新Y形桩在软基处理中的试验与沉降预测分析  

Experimental study and settlement prediction analysis of a new Y-shaped pile with prefilled mixture in soft ground treatment

作　　者：廖克武 李俊 赵汉金 LIAO Kewu;LI Jun;ZHAO Hanjin(The Architectural Design&Research Institute of Zhejiang University Co.,Ltd.,Hangzhou 310028,Zhejiang,China;Department of Architecture and Civil Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;Zhejiang Geological and Mineral Construction Co.,Ltd.,Hangzhou 310052,Zhejiang,China)

机构地区：[1]浙江大学建筑设计研究院有限公司,浙江杭州310028 [2]浙江大学建筑工程学院,浙江杭州310058 [3]浙江省地矿建设有限公司,浙江杭州310052

出　　处：《地基处理》2024年第6期626-632,共7页Journal of Ground Improvement

基　　金：浙江省交通运输厅项目(ZJXL-JTT-202201A和202303)。

摘　　要：本文针对深厚淤泥质土地基处理问题,介绍了一种新型预填混合料后膨胀混凝土地基处理方法,通过在Y形桩模中灌注预填混合料,达到控制沉降和提高承载力的目的。预填混合料的主要组分为水泥、生石灰、石屑等。基于温州某项目,根据处理区域含水量不同,结合室内试块抗压强度试验,合理确定混合料配比,并开展了现场载荷试验,验证了该地基处理方法的可行性。通过数值模拟计算,对比了采用该地基处理方法前后沉降位移和孔隙水压力的变化情况,研究结果表明:该桩型具有用料省、地基处理深度大、施工效率高等优点,适合在道路、广场、轻型展区等需进行地基处理的区域应用,值得进一步研究和推广。This article introduces a new ground treatment method for deep mucky soil layers using post expansive concrete combined with a prefilled mixture.The prefilled mixture is poured into the Y-shaped pile mold to control settlement and improve bearing capacity.The main components of the prefilled mixture are cement,quicklime,stone chips,etc.Based on the different water contents in the treatment area and combined with indoor compression strength tests,the mixture ratio was reasonably determined.An on-site load test was conducted to validate the feasibility of this ground treatment method,using a project in Wenzhou as a case study.Numerical simulations were performed to compare settlement and changes in pore water pressure with and without the application of this ground treatment method.Results indicate that this type of pile has the advantages of saving materials,deep ground treatment,and high construction efficiency.It is particularly suitable for application in ground treatment in areas such as roads,squares,and light exhibition areas.This method shows significant potential for further research and broader application.

关 键 词：预填混合料 新Y形桩 后膨胀混凝土 深厚软土 沉降预测 地基处理 

分 类 号：TU47[建筑科学—结构工程]