分级式水平排水板真空预压处理淤泥模型试验研究  

Studyon Model Experiment of Sludge Treatmentby Prefabricated Horizontal Drain Stepped Vacuum Preloading

作　　者：彭怡鸿 李明东 付晓杰 PENG Yihong;LI Mingdong;FU Xiaojie(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学土木与建筑工程学院,江西南昌330013

出　　处：《佳木斯大学学报（自然科学版）》2024年第11期55-58,117,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：国家自然科学基金(52168043);核资源与环境国家重点实验室开放基金(2022NRE29)。

摘　　要：为了提高淤泥处理效果,结合水平排水板真空预压(PHD-VP)板材不弯折和分级真空预压(SVP)减缓淤堵的优点,提出了分级式水平排水板真空预压(PHD-SVP)。通过竖向排水板真空预压(PVD-VP),PHD-VP,PHD-SVP三组模型试验中排水量、排水速率、含水率、十字板抗剪强度指标评价淤泥处理效果,并利用颗粒分析探究排水板处土颗粒迁移规律。试验结果表明PHD-SVP比PVD-VP,PHD-VP排水量提高了26.8%,13.4%,含水率降低了3.9%~4.8%,1.1%~4.5%,十字板抗剪强度提高了5.6%~8.3%,1.8%~5.3%。颗粒分析研究表明PHD-SVP比PVD-VP,PHD-VP排水板处0.001-0.010mm土颗粒含量分别降低2.7%,2.1%.In order to improve the sludge treatment effect,this paper proposed an prefabricated horizontal drain stepped vacuum preloading(PHD-SVP)considering the advantages of the prefabricated horizontal drain vacuum preloading(PHD-VP)without bending and the stepped vacuum preloading(SVP)to reduce silting.The model experiments were conducted to explore the treatment effect of the prefabricated vertical drain vacuum preloading(PVD-VP),the PHD-VP and the PHD-SVP by analysis of water discharge,drainage rate,water content,and vane shear strength,and the particle analysis was employed to observe the migration rule of soil particles surrounding drain.The experimental results showed that compared with the PVD-VP and the PHD-VP,the water discharge by the PHD-SVP was increased by 26.8%and 13.4%,the water content was reduced by 3.9%~4.8%and 1.1%~4.5%,and the vane shear strength was increased by 5.6%-8.3%and 1.8%~5.3%.Particle analysis showed that the PHD-SVP reduced the particle(0.001-0.010mm)content of the drain by 2.7%and 2.1%compared with the PVD-VP and the PHD-VP.

关 键 词：真空预压 水平排水板 分级真空预压 淤泥 固结 模型试验 

分 类 号：TU411[建筑科学—岩土工程]