岩土工程学报2017，Vol.39Issue(z2)：189-193,5.DOI:10.11779/CJGE2017S2046
新型无膜真空预压法加固超软吹填土模型试验及数值模拟分析
Model tests and numerical simulations of newly sheet-free vacuum preloading method for ultra-soft dredger fills
雷华阳 1刘英男 2冯双喜 2刘景锦2
作者信息
- 1. 滨海土木工程结构与安全教育部重点实验室,天津 300072
- 2. 天津大学建筑工程学院,天津 300072
- 折叠
摘要
Abstract
There are problems when dealing with the dredger fills using the traditional vacuum preloading method, for example, the treated area can not be too large and the plastic-sheet maybe leaks. To solve these problems, the new sheet-free vacuum preloading method is proposed, in which the mud-covering replaces the plastic sheet. This method can improve the treated area, save the cost of plastic sheet and solve the problem of piling up dredger fills. In order to investigate the effect and influence factors of the new vacuum preloading method, laboratory model tests and numerical simulations are carried out. The displacement of soil, the change of pore water pressure at the specific location and the settlement of soil surface in different loading modes are studied. The conclusions are that the effect of the sheet-free vacuum preloading method on the soft soil foundation treatment is good, and the effect of the treatment can be improved by the way of graded loading. The numerical simulation software PFC2D is used to study the movement of soil particles in the process of sheet-free vacuum preloading. The results show that under the vacuum pressure, the soil particles mainly gather towards the PVDs. It can reduce the clogging of PVDs by graded loading to get better treatment effect.关键词
无膜法/真空预压/吹填土/模型试验/分级加载/PFCKey words
sheet-free method/vacuum preloading/dredger fill/model test/graded loading/PFC分类
建筑与水利引用本文复制引用
雷华阳,刘英男,冯双喜,刘景锦..新型无膜真空预压法加固超软吹填土模型试验及数值模拟分析[J].岩土工程学报,2017,39(z2):189-193,5.
