滨海相软土路基就地固化实施效果对比分析  

Comparative Analysis of the Implementation Effect of In-situ Solidification of Subgrade in Coastal Soft Soil

作　　者：张志明 蓝梓濠 ZHANG Zhiming;LAN Zihao(Guangzhou Highway Engineering Group Co.,Ltd.,Guangzhou Guangdong 510180,China)

机构地区：[1]广州公路工程集团有限公司,广东广州523837

出　　处：《交通节能与环保》2023年第5期243-246,252,共5页Transport Energy Conservation & Environmental Protection

摘　　要：为验证就地固化技术应用于滨海相软土地区软基处理的可行性,本文依托某滨海相公路建设项目,针对三种不同工况(浅层2m整体固化、浅层3m整体固化、浅层2m整体固化+水泥搅拌桩)的就地固化技术方案,开展三维有限元计算模拟和现场测试试验研究,对比分析该类场地条件下采用不同加固方法的实施效果。研究结果表明:采用文中提出的三种加固方案均可满足规范中路基工后沉降要求,增加整体固化厚度能有效减小路基工后沉降和差异沉降。加固工况3较加固工况1虽能显著减少路基工后沉降,但在满足相同变形控制要求的前提下,加固工况1的技术和经济优势更加显著。In order to verify the feasibility of in-situ solidification technology applied to subgrade treatment in coastal soft soil,based on a coastal highway construction project,three-dimensional finite element simulation and on-site testing experimental were carried out for three different working conditions(shallow 2m overall solidification,shallow 3m overall solidification,shallow 2m overall solidification with cement mixing piles)of in-situ solidification technology schemes,and compared the implementation effects of different methods under the conditions of this type of site.The results indicate that the three reinforcement schemes proposed in the paper can meet the post construction settlement requirements of the subgrade in the specifications,and increasing the overall solidification thickness can effectively reduce the post construction settlement and differential settlement of the subgrade.Although reinforcement condition 3 can significantly reduce post construction settlement compared to reinforcement condition 1,the technical and economic advantages of reinforcement condition 1 are more significant under the premise of meeting the same deformation control requirements.

关 键 词：公路工程 软土路基 就地固化技术 工后沉降 

分 类 号：U416.16[交通运输工程—道路与铁道工程]