Improved calculation method for consolidation of dredger fill treatment using prefabricated vertical-horizontal drains

被引：7

作者：

Chen Geng ^{[1
]}

Lin, Minguo ^{[2
]}

Chen Yonghui ^{[1
]}

Guo, Yanxiang ^{[2
]}

Jing Wu ^{[2
]}

Su, Ruobin ^{[2
]}

机构：

[1] Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing, Peoples R China

[2] Hohai Univ, Res Inst Geotech Engn, 1 Xikang Rd, Nanjing 210098, Peoples R China

来源：

MARINE GEORESOURCES & GEOTECHNOLOGY | 2023年 / 41卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Dredger fill; soil consolidation; nonlinear consolidation; prefabricated vertical-horizontal drains; consolidation calculation; SOFT SOIL; BEHAVIOR; LAND; TIME;

D O I：

10.1080/1064119X.2022.2101965

中图分类号：

P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

Prefabricated vertical-horizontal drains (PVHDs) with high efficiency have been applied to accelerate the consolidation of dredger fill foundations. Considering the nonlinear characteristics of soil, the horizontal and vertical drainage paths and the penetration degree of horizontal drainage pipes, an improved consolidation calculation method for dredger fill foundations treated by PVHDs was developed. Sensitivity analysis was carried out on the parameters of the PVHDs system, and the effectiveness of the proposed method was verified by field tests. It is found that the parameters C-c/C-k, loading ratio (Delta p/sigma'), and penetration degree (rho) jointly control the rate of the consolidation process. The average settlement consolidation degree (U-s) calculated by the proposed method agrees well with the field test values. By increasing rho from 0.2 to 1.0, the consolidation time can be reduced by half when U-s reaches 90%.

引用

页码：815 / 823

页数：9

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