水泥土搅拌桩在卵砾石地层的应用研究进展
摘要:卵砾石地层可压缩性低、抗剪强度大，水泥土搅拌桩工法在应用于卵砾石地层时存在若干技术问题。系统总结了水泥土搅拌桩工法在卵砾石地层的应用情况，重点对水泥土搅拌桩应用于卵砾石地层的技术难点及主要的改进措施进行了论述，并分析了各改进方法的作用机理、适用性、利弊等。水泥土搅拌桩在穿越卵砾石地层过程中存在施工效率低下、钻具磨损大、施工质量不易控制等技术难题，目前已有水泥土搅拌桩应用于卵砾石地层的成功案例中主要改进工艺可分为钻进、搅拌、排渣共计三大类别，具体可细化为提高动力机头功率、控制钻头钻压及转速、提高钻具材料强度、改进钻头及搅拌叶片结构形式、使用土体改良剂等措施，必要时可引入引孔换填、冲击破碎等工法辅助施工。但总体上应用成功的案例中，卵砾石地层的颗粒粒径及厚度较小，一般粒径不超过150 mm，且未形成系统性的卵砾石地层特征与机械设备技术参数的匹配方法。搅拌桩设备与卵砾石地层相互作用机理研究等工作亟待深化。
Abstract:Gravel stratum has low compressibility and high shear strength. There are some technical problems in the application of cement soil mixing pile method in gravel stratum. The application of cement soil mixing pile in gravel stratum was summarized, and the technical difficulties and main improvement measures of cement soil mixing pile in gravel stratum were also discussed. The action mechanism, applicability, advantages and disadvantages of each improvement method were analyzed. During the process of cement soil mixing pile crossing gravel stratum, there are technical problems such as low construction efficiency, large wear of drilling tools and difficult control of construction quality. At present, there are successful cases of cement soil mixing pile applied to gravel stratum. The main improved processes can be divided into three types, including drilling, mixing and slag discharge, which can be subdivided into improving the power of power machine head, controlling the bit weight and speed, improving the strength of drilling tool materials, improving the structural form of bit and mixing blade, and using soil modifier. If necessary, pilot hole replacement and impact crushing can be introduced to assist the construction. However, in the successful cases, the particle size and thickness of gravel stratum are small, generally no more than 150 mm in particle size, and there is no systematic matching method between gravel stratum characteristics and mechanical equipment technical parameters. The research on the interaction mechanism between mixing pile equipment and gravel stratum needs to be deepened.
中文标题：
水泥土搅拌桩在卵砾石地层的应用研究进展
Research Progress on Application of Cement Soil Mixing Pile in Gravel Stratum
作者：
梁涛1, 2,,钟建文3,关岩鹏2,,,刘晓丽4,高艳卫5
Liang Tao1, 2,,Zhong Jianwen3,Guan Yanpeng2,,,Liu Xiaoli4,Gao Yanwei5
作者简介:梁 涛，1978年生，男，博士，研究员，主要从事岩土工程方面的科研工作。 E-mail：729693453@qq.com通讯作者:关岩鹏，1988年生，男，博士，助理研究员，主要从事工程岩土力学方面的科研工作。 E-mail：hbgyp2008@163.com
通讯地址：
1.中国航天建设集团有限公司，北京 100071 2.航天规划设计集团有限公司，北京 100162 3.清华大学基建规划处，北京 100084 4.清华大学水沙科学与水利水电工程国家重点实验室，北京 100084 5.北京航天地基工程有限责任公司，北京 100070
1.ChinaAerospaceConstructionGroupCo.,Ltd.,Beijing100071,China 2.AerospacePlanningandDesignGroupCo.,Ltd.,Beijing100162,China 3.TheConstructionandPlanningOffice,TsinghuaUniversity,Beijing100084,China 4.StateKeyLaboratoryofHydroscienceandEngineering,TsinghuaUniversity,Beijing100084,China 5.BeijingAerospaceFoundationEngineeringCo.,Ltd.,Beijing100070,China
中图分类号:TU 473.2
doi:10.3969/j.issn.1007-2993.2022.04.001
出版物：岩土工程技术
收稿日期:2021-09-06
网络出版日期:2022-08-08
刊出日期:2022-08-08
关键词:地基处理,水泥土搅拌桩,卵砾石地层,止水帷幕
Key words:foundation treatment,cement soil mixing pile,gravel stratum,waterproof curtain
文档包含图片数量：图片(4)张
文档包含表格数量：表格(2)个
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基金项目：
基金项目:中国航天建设集团有限公司科研基金（YK2020-01-01）；航天建筑设计研究院有限公司科研基金（YK2020-05）；国家自然科学基金面上项目（52079068）
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