吹填土场地加固中水泥土施工技术试验研究

Experimental study on cement-solidified soil construction technology in reinforcement of dredger fill site

为提高在吹填土场地中,水泥土施工技术的应用效能,以上海地区吹填土场地加固工程为依托,设计了含水率控制方法,通过试验研究了延迟击实时间和碾压方式对水泥土应用效果的影响。试验结果中,延迟击实时间超过4 h,水泥土7 d无侧限抗压强度降低44.3%~47.1%,故工程中延迟击实时间不应超过4 h。对比了2种碾压方式下的场地收面效果和压实度,确定了最佳碾压施工工艺。文中研究的成果不仅可为本工程建设提供支撑,也可为同类工程施工及质量控制提供借鉴。

In order to improve the application efficiency of cement-solidified soil construction technology in dredger fill site,a water content control method was designed based on the reinforcement project of dredger fill site in Shanghai.The effects of delayed compaction time and rolling method on the application effect of cement-solidified soil were studied through experiments.In the test results,the 7 d unconfined compressive strength of cement-solidified soil will decreases by 44.3%-47.1%when the delayed compaction time exceeds 4 hours.So the delayed compaction time in engineering should not exceed 4 hours.By comparing the surface finishing effect and compaction degree of the site under two rolling methods,the optimal rolling construction process was determined.The research results can provide support for the construction of this project,and provide reference for the construction and quality control of similar projects.