The PVD-Accelerated Soil Deposit Consolidation Based on Elliptic Cylindrical Model

Q3 Engineering Open Civil Engineering Journal Pub Date : 2023-07-01 DOI:10.28991/cej-2023-09-07-08
Y. Zaika, G. R. Kololikiye, .. Harimurti
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Abstract

One method to deal with the problem of soft soil is to accelerate consolidation by preloading and prefabricating a vertical drain (PVD). Consolidation analysis was based on a one-dimensional theory that required PVD as an equivalent circular well. Further studies on a simple approximate for consolidated soil were represented by equivalent permeability coefficients, kve. The equivalent conductivity coefficient is influenced by the soil and PVD permeability coefficients. The formulation of kve based on the influence area in cylindrical has been applied to a lot of construction projects. According to the comparative analysis of the classical consolidation theory, it is considered that the diameter of the circle is less representative. This study proposed a simple formulation of kve based on the elliptical assumption of influence area. The kvewas derived based on an equal average degree of consolidation in one dimension, which applied the elliptical coordinate for degree of consolidation in the radial direction. The formulation is based on an elliptical cross-section and a cylindrical coordinate formulation. The validation of this formula is conducted with numerical calculations using 2D FEM. The results show that the consolidation time in the elliptical discharge area is shorter than that in the circular discharge area. Doi: 10.28991/CEJ-2023-09-07-08 Full Text: PDF
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基于椭圆圆柱模型的pvd加速土沉积固结
解决软土问题的一种方法是通过预压和预制垂直排水(PVD)来加速固结。固结分析基于一维理论,要求PVD为等效的圆井。进一步研究固结土的简单近似用等效渗透系数kve表示。等效导电性系数受土壤和PVD渗透系数的影响。基于柱面影响面积的kve公式已在许多工程中得到应用。通过与经典固结理论的对比分析,认为圆直径的代表性较弱。本文基于影响面积的椭圆假设,提出了一种简单的kve公式。以一维等平均固结度为基础,采用椭圆坐标表示径向固结度。该公式基于椭圆截面和圆柱坐标公式。通过二维有限元数值计算对公式进行了验证。结果表明:椭圆型放电区固结时间短于圆形放电区固结时间;Doi: 10.28991/CEJ-2023-09-07-08全文:PDF
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来源期刊
Open Civil Engineering Journal
Open Civil Engineering Journal Engineering-Civil and Structural Engineering
CiteScore
1.90
自引率
0.00%
发文量
17
期刊介绍: The Open Civil Engineering Journal is an Open Access online journal which publishes research, reviews/mini-reviews, letter articles and guest edited single topic issues in all areas of civil engineering. The Open Civil Engineering Journal, a peer-reviewed journal, is an important and reliable source of current information on developments in civil engineering. The topics covered in the journal include (but not limited to) concrete structures, construction materials, structural mechanics, soil mechanics, foundation engineering, offshore geotechnics, water resources, hydraulics, horology, coastal engineering, river engineering, ocean modeling, fluid-solid-structure interactions, offshore engineering, marine structures, constructional management and other civil engineering relevant areas.
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