高压旋喷注浆加固深层软土数值仿真研究  

Study on Numerical Simulation of High Pressure Jet Grouting Reinforce Deep Soft Soil

作　　者：李懿 刘子竹 邓先琪 Li Yi;Liu Zizhu;Deng Xianqi(Guangzhou Railway Polytechnic,Guangzhou,Guangdong 511300;Guangdong University of Foreign Studies,Guangzhou,Guangdong 510006)

机构地区：[1]广州铁路职业技术学院,广东广州511300 [2]广东外语外贸大学,广东广州510006

出　　处：《江西建材》2024年第11期210-212,216,共4页

基　　金：广州铁路职业技术学院新引进人才科研启动项目《珠海深厚软土场地基坑支护稳定性及工程桩偏斜影响因素研究》(项目编号:GTXYR2416);广州铁路职业技术学院新引进人才科研启动项目《基于深度学习的铁路桥梁结构等几何拓扑优化设计方法研究》(项目编号:GTXYR2305)

摘　　要：高压旋喷注浆不同于传统的灌浆方法,其施工工艺、施工设备、胶结体的成型机理都比传统灌浆复杂,用该方法对深层软基加固效果方面的机理研究显得尤为重要。文中应用有限元软件MSC.Marc对旋喷注浆处理后的复合地基“群桩”效果进行模拟,分析复合地基承载机理和承桩效果,并研究土体材料参数、桩顶覆土厚度、旋喷桩数3个方面与地表沉降的关系。结果表明,离旋喷桩中心距离越远地表沉降越小;最大地表沉降量随桩顶覆土厚度增加而减少,且覆土厚度越小,地表沉降范围越小;土体材料不同地表沉降减少趋势也稍有不同;旋喷桩数越多地表沉降越大。Different from the traditional grouting of high-pressure rotary jet grouting method,its construction technology,construction equipment,the cementing body forming mechanism is more complicated than the traditional grouting,expanding the way of deep soft foundation reinforcement effect mechanism of the research is particularly important.This article applied finite element software MSC.Marc of rotary jet grouting process to simulate the effect of the pile group of composite foundation and analyze bearing mechanism.It studies on three aspects of jet grouting pile and the relationship between the surface subsidence about the material parameters of soil,pile top cover soil thickness and the number of piles.Results show that the farther the distance from the center of a rotary spray pile surface subsidence is smaller;maximum surface subsidence fall off with increasing pile head covering thickness;the smaller the thickness of overburden soil,the surface subsidence range is smaller;surface subsidence reducing trend vary by soil materials;with increasing jet grouting pile numbers will raise surface subsidence.

关 键 词：高压旋喷注浆 土体材料 覆土厚度 旋喷桩数 

分 类 号：TU472[建筑科学—结构工程]