工程地质学报2017，Vol.25Issue(3)：678-685,8.DOI:10.13544/j.cnki.jeg.2017.03.013
线性加载下塑料排水板地基固结理论探讨
CONSOLIDATION THEORY FOR PREFABRICATED VERTICAL DRAIN WITH LINEAR PRELOADING
摘要
Abstract
Consolidation calculations for prefabricated vertical drains(PVds) are approximately equivalent to sand well model at home and abroad.PVds are equivalent to the flat oval cylinder in this paper.Consolidation solution for PVD foundation is derived with linear load according to equal strain assumption with confocal elliptical coordinate.The correctness of present theory is verified by ADINA finite element calculation and the existing results.The present theory is closer to Long & Covo model "dw =0.5b+0.7δ" in two-dimensional consolidation theory.The "shape effect" of flat rectangular cross is better than circular cross-section.Equivalent model for PVds in "Code for design of sea dike project(GB/T 51015-2014)" and "Technical Specification for Vacuum preloading Technique to Improve Soft Soils (JTS147-2-2009)" overestimates the capacity of PVds while considering well resistance.In addition,the longer of linear loading time,the slower rate of consolidation rate,and significant difference with the plummeted loading conditions.关键词
固结理论/塑料排水板/同焦椭圆柱坐标系/线性加载/井阻Key words
Consolidation theory/Prefabricated vertical drain/Confocal elliptical coordinate/Linear loading/Well resistance分类
天文与地球科学引用本文复制引用
黄朝煊,方咏来..线性加载下塑料排水板地基固结理论探讨[J].工程地质学报,2017,25(3):678-685,8.基金项目
浙江省水利水电勘测设计院科标业项目(B1608,B1609),水利部公益性行业科研专项项目(201401010)资助. （B1608,B1609）
