岩土工程学报2025，Vol.47Issue(7)：1545-1552,8.DOI:10.11779/CJGE20240159
上覆回填土的吹填淤泥地基反向真空预压法试验研究
Reverse vacuum preloading method for overlying backfill soil of blown silt foundation
摘要
Abstract
A reverse vacuum preloading method is proposed to address the problems of poor reinforcement effects of deep soil and vacuum loss when the traditional vacuum preloading is used to treat silt foundation.This method uses a reverse drainage plate to apply vacuum pressure to the deep soil directly.The influences of backfill soil thickness on the reinforcement effects of reverse vacuum preloading method are studied through the indoor model experiments.Compared with the traditional vacuum preloading,the reverse vacuum preloading method increases the drainage volume by 16.46%,increases the vane shear strength of the deep soil by 20.50%,and significantly improves the overall reinforcement effects.With the increase of the backfill soil thickness,decreasing the rate of the vane shear strength in the silt layer along the depth direction is significantly reduced,and the treatment effects are more uniform.In addition,through on-site comparison between the reverse and traditional vacuum preloading methods,it is found that the surface settlement of the soil treated by the reverse vacuum preloading method increases by 15.70%,the dissipation of pore pressure in deep soil increases by 26.20%,and the average vane shear strength increases by 21.12%.Therefore,it is concluded that the reverse vacuum preloading method is an effective foundation treatment method,especially for deep soil reinforcement.关键词
反向真空预压法/RPVD/回填土Key words
reverse vacuum preloading method/RPVD/backfill分类
建筑与水利引用本文复制引用
高紫阳,王军,高明伟,朱萧霄,符洪涛,徐昭,吕有畅..上覆回填土的吹填淤泥地基反向真空预压法试验研究[J].岩土工程学报,2025,47(7):1545-1552,8.基金项目
国家自然科学基金项目(52325806,42407208,W2411045,52408388) （52325806,42407208,W2411045,52408388）
浙江省教育厅科研项目(Y202352687,Y202352066) （Y202352687,Y202352066）
温州市基础性科研项目(ZS2023005,S2023002,S2023003,G20240032)This research was supported by the National Science Fund of China(Grant Nos.52325806,42407208,W2411045,52408388),Research Project of Zhejiang Provincial Department of Education(Grant Nos.Y202352687,Y202352066),Wenzhou Basic Research Fund Project(Grant Nos.ZS2023005,S2023002,S2023003,G20240032). （ZS2023005,S2023002,S2023003,G20240032）
