数字化微扰动搅拌桩在敏感环境深基坑中的应用研究  

Application study of digital micro-disturbance mixing piles in sensitive environment excavation pit

作　　者：杜策 李青[2] 张振[3,4] Du Ce;Li Qing;Zhang Zhen(Shanghai Yuanfeng Underground Engineering Co.,Ltd.,Shanghai 201015,China;East China Architecture Design&Research Institute Co.,Ltd.,Shanghai 200011,China;Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China)

机构地区：[1]上海渊丰地下工程技术有限公司,上海201015 [2]华东建筑设计研究院有限公司,上海200011 [3]同济大学土木工程学院地下建筑与工程系,上海200092 [4]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《工程勘察》2025年第4期30-35,共6页Geotechnical Investigation & Surveying

摘　　要：基于常规水泥土搅拌桩施工扰动大、数字化程度低等问题,本文介绍了数字化微扰动搅拌桩(DMP工法)装备和工艺的技术创新。并通过深厚粉土中的现场成桩试验检验了施工影响以及成桩质量,主要结论如下:通过采用上下转换喷浆、多层可变角度叶片以及搅拌次数的数字化控制,显著提升了DMP工法搅拌桩成桩的均匀性,15%的水泥掺量桩体强度可以达到0.8MPa,并且取芯检测显示芯样完整度高、均匀连续、胶结度好;数字化控制系统通过调整施工中的地内压力,降低了对周边地层的扰动,实测距离桩中心2 m处最大水平位移为3.89 mm。The Digital Micro-disturbance mixing Pile(DMP)method is introduced in this paper as a technological innovation to address the shortcomings of conventional deep mixing,such as significant installation disturbances and low digitalization level.Field tests are conducted to investigate the construction influences and pile quality.The following main conclusions are obtained:by utilizing penetration and withdraw switching grouting,the multi-layer variable angle blades and the number of mixing times,the piling uniformity is significantly improved.In deep silty soil layers,a cement content of 15%achieves the UCS with 0.8MPa,validated by core sampling indicating high integrity,uniformity,and good consolidation.The digital construction system effectively manages the stratum pressure during construction,minimizing the disturbance to surrounding soils,and the maximum horizontal displacement measured at the 2 meters from the pile center is 3.89mm.

关 键 词：微扰动 DMP工法 数字化施工控制 地内压力 上下转换喷浆 

分 类 号：TU67[建筑科学—建筑技术科学]