改性纤维排水板真空预压加固吹填软土试验研究  

Vacuum preloading reinforcement of soft dredger soil by modified fiber drainage plate

作　　者：杨少朋 杨爱武 许福军 YANG Shao-peng;YANG Ai-wu;XU Fu-jun(School of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;State Key Laboratory of Fiber Material Modification,Donghua University,Shanghai 201620,China;Key Laboratory of Textile Fabric Technology,Ministry of Education,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620 [3]东华大学纺织面料技术教育部重点实验室,上海201620

出　　处：《岩土力学》2025年第3期789-797,共9页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.51978440,No.42177119,No.42377141);中央高校基本科研业务费专项资金(No.2232021A-07)。

摘　　要：针对目前废弃纤维资源化利用和真空预压加固吹填软土地基效果欠佳等问题,在废弃纤维改性处理的基础上,研制出改性纤维塑料排水板,利用梯度比试验和室内真空预压模型试验,对比分析了不同改性纤维滤膜淤堵特性和不同类型排水板真空预压加固吹填软土效果及规律。试验结果表明:改性纤维滤膜孔径超过119μm防淤堵效果更好;改性纤维排水板在沉降量、出水量、真空度、孔隙水压力、土样含水率和十字板剪切强度等指标上都优于普通塑料排水板,且滤膜孔径为119μm的排水板加固效果最佳,相较于普通塑料排水板(分体式),其成本较低的同时,含水率平均降低6.4%,十字板剪切强度平均提高了7.8k Pa,充分体现了改性纤维排水板在工程应用中不仅具有良好的加固效果,还能降低成本,符合国家基础设施建设和经济绿色可持续发展理念。Addressing the current issues of poor resource utilization of waste fibers and ineffective vacuum preloading reinforcement for dredger fill,we developed a modified fiber plastic drainage plate based on the modification treatment of waste fibers.Using gradient ratio tests and indoor vacuum preloading model tests,we compared and analyzed the clogging characteristics of various modified fiber filter membranes,as well as the effects and patterns of vacuum preloading using different types of drainage plates on soft soils.The results show that the anti-clogging effect of the modified fiber filter membrane with a pore size of more than 119µm is better.The modified fiber drainage plate is superior to the ordinary split-type plastic drainage plate in terms of settlement,water output,vacuum degree,pore water pressure,soil moisture content,and vane shear strength.The drainage plate with a filter membrane pore size of 119µm exhibits the best reinforcement effect.Compared to the ordinary split-type plastic drainage plate,it has a lower cost,reduces moisture content by an average of 6.4%,and increases vane shear strength by an average of 7.8 kPa.This fully demonstrates that the modified fiber drainage plate not only provides excellent reinforcement in engineering applications but also reduces costs,aligning with the national goals for infrastructure construction and economic green sustainable development.

关 键 词：改性纤维排水板 真空预压 吹填软土 梯度比 淤堵 

分 类 号：TU447[建筑科学—岩土工程]