Experimental Study on Drainage Efficiency Enhancement Mechanism of Soft Soil Under Air-injection Pressurization

被引：0
|
作者：
Liang Z. [1 ]
Xie L. [1 ]
Gu K. [2 ]
Jiang B. [3 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
[2] CCCC Third Harbor Consultants Co.，Ltd., Shanghai
[3] Shanghai Real Estate North Investment Development Co.，Ltd., Shanghai
来源：
Tongji Daxue Xuebao/Journal of Tongji University | 2023年 / 51卷 / 08期
关键词：
air-injection pressurization; drainage; pneumatic fracturing; settlement; soft soil; vacuum preloading;
D O I：
10.11908/j.issn.0253-374x.22062
中图分类号：
学科分类号：
摘要：
In this paper， we investigate the inherent mechanism of the drainage effect of soft soil under air-injection pressurization through one-dimensional physical tests on the remolded soil. The experimental system includes pressurization devices， soft soil compaction （fracture） observation devices， drainage measurement devices，etc. Then，we observe the settlement of the soft soil，the drainage process，and the crack development characteristics. The results show that the pressure gas achieves the drainage compaction and fracturing of the soil by displacing the pore water and elastically expanding the pores. Combined with the obvious weak characteristics（or cracks）and the degree of surface soil compaction，the drainage enhancement mechanisms of soft soil under air injection pressurization can be divided into three types：drainage with fracturing，drainage with compaction，and drainage with permeability. © 2023 Science Press. All rights reserved.
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页码：1251 / 1258
页数：7
相关论文
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