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- Title
长江河漫滩软土地基真空联合堆载预压 加固效果评价.
- Authors
程中强; 龚泽佳; 章定文; 曾 亮; 孙乔龙; 袁小红; 张茂林
- Abstract
Combined with the engineering characteristics of the Yangtze River floodplain soft soil, a comprehensive analysis of reinforcement effect is carried out for a construction area of the relocation project of Nanjing North railway station from the perspectives of on-site monitoring data, in-situ vane shear test and geotechnical test by analyzing the reinforcement process of vacuum and surcharge preloading. In terms of monitoring data, the data of surface settlement and pore water pressure data show that single vacuum preloading can further improve the effect of soil reinforcement after consolidation and stabilization. The results of vane shear test show that the reinforcement effect decreases with depth, which is consistent with the analysis conclusion of the variation law of pore water pressure with depth. The data of geotechnical test show that the physical and mechanical properties of soil are significantly improved after reinforcement. In summary, the combination of vacuum and surcharge preloading has good reinforcement effect on the soft soil foundation of the Yangtze River floodplain, with high reinforcement efficiency. After 6 months of construction, the degree of consolidation can reach 94.47%, and the soil strength is significantly improved. In order to verify the accuracy of the conclusions, the pore water pressure data and vane shear test data, vane shear test data and geotechnical test data are mutually verified. The verification results show that the experimental data are reliable and the accuracy of reinforcement effect evaluation is high.
- Publication
Journal of Ground Improvement, 2023, Vol 5, Issue 3, p215
- ISSN
2096-7195
- Publication type
Article
- DOI
10.3785/j.issn.2096-7195.2023.03.005