排水板真空度损耗的排水固结解析解

发布时间：2018-02-13 18:18

本文关键词： 解析解固结真空损耗超静孔压　出处：《岩土工程学报》2016年03期 　论文类型：期刊论文

【摘要】：无砂真空预压吹填软土在国内造地工程中广泛应用,但实践表明传统固结解析解已不足以预测其加固性状和加固效果。从固结方程出发,在原有的等应变假设基础上,在定解条件中增加了吹填土特有的高度欠固结特性和无砂真空预压特别明显的真空度损耗,重新推导得到径向和竖向完全协调的新的等应变解析解——JJJ解答,以解决无砂真空预压吹填软土的排水固结设计理论问题。JJJ法作为固结方程的原生解答,兼容以往所有该类解析解的同时,增加了针对高度欠固结土类和排水板真空度损耗严重的排水固结问题的解决能力。经现场和试验验证,JJJ解析解可相当精确预测无砂真空预压吹填软土的复杂固结过程和加固土体超孔压分布和孔压消散分布,该解答同时也适用于堆载和真空预压的工况。
[Abstract]:Sand free vacuum preloading filled soft soil is widely used in domestic land reclamation projects, but practice shows that the traditional consolidation analytical solution is not enough to predict its reinforcement behavior and effect. Based on the consolidation equation and the original equal strain assumption, the traditional consolidation analytical solution is not enough to predict its reinforcement behavior and effect. In the fixed solution condition, the special high underconsolidation characteristic of the blow fill and the particularly obvious vacuum loss of the sand free vacuum preloading are added, and a new analytical solution of equal strain, which is completely coordinated in the radial and vertical directions, is derived again, which is the JJJ solution. In order to solve the theoretical problem of drainage consolidation design of unsand-free vacuum preloading filled soft soil. JJJ method is used as the primary solution of consolidation equation, which is compatible with all the previous analytical solutions. The ability of solving the problem of high underconsolidated soil and serious vacuum loss of drainage plate is increased. It is proved by field and test that the analytical solution of JJJ can accurately predict the complex consolidation of sand free vacuum preloading filled soft soil. The distribution of superpore pressure and pore pressure dissipation in the process and reinforcement of soil, The solution is also applicable to the working conditions of surcharge and vacuum preloading.
【作者单位】：中交上海航道勘察设计研究院;交通行业疏浚技术重点实验室;
【基金】：交通部重点平台项目(2011-329-752-190)
【分类号】：TU447;TU472.33

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