滩涂地区软土就地固化技术

广东牛田洋快速道路基范围多滩涂,土壤天然含水率高达139.42％,承载力极低,没有持力层,施工机械无法进入场地.为了改善路基土的力学性质,减少对周围环境的影响,采用了就地固化技术对滩涂土进行处理.为了进一步反映土壤固化后的性质变化,分别就路基土固化后的含水率、强度以及承载力展开研究,并对固化路基的极限承载力进行预测.结果表明:采用的5％水泥+2％粉煤灰的固化剂配比足够满足工程需求,且可以通过规范法或拟合方程校核固化地基的承载力.论证了就地固化技术在滩涂地区的适用性.

Study on solidification technology of soft soil in beach area

The roadbed of Niutianyang Expressway in Guangdong province is covered by multiple beaches, and the natural moisture content of the soil is as high as 139.42%, with extremely low bearing capacity. Construction machinery cannot enter the site because there is no load layer. In order to improve the mechanical properties of subgrade soil and reduce the impact on the surrounding environment, in-situ solidification technology was used to treat the tidal flat soil. In order to further reflect the change of soil properties after solidification, the water content, strength and bearing capacity of subgrade soil after solidification were studied respectively, and the ultimate bearing capacity of solidified subgrade was predicted to demonstrate the applicability of local solidification technology in tidal area.