考虑变井阻和涂抹效应的真空预压三维有限元分析

发布时间：2018-05-03 18:19

本文选题：变井阻效应 + 涂抹效应　；参考：《岩土力学》2017年05期

【摘要】：真空预压工程中塑料排水板等竖井通水量随地基深度和固结时间而变化,即变井阻效应已经证明是实际存在的。另一方面,在真空预压工程三维有限元分析中,由于竖井和涂抹区在有限元模型中的划分使得三维有限元模拟较为困难。为真实模拟真空预压工程实际情况,在有限元分析中引入变井阻数学模型,并给出变井阻无量纲参数A_1、α_2。另外,为降低三维有限元建模难度,选用合适的网格单元简化竖井区,并用等效方法简化涂抹区,实现了考虑涂抹、变井阻效应的三维有限元分析。以天津港某围海造陆工程为例,建立三维有限元模型进行分析计算,对比分析计算值与实测数据,验证了程序的合理性,为以后软基加固工程三维有限元模拟提供了一种有效方法。
[Abstract]:In the vacuum preloading project, the water volume of the shaft of the plastic drainage plate varies with the foundation depth and the consolidation time. That is, the variable well resistance effect has proved to be the actual existence. On the other hand, in the three-dimensional finite element analysis of the vacuum preloading engineering, the three-dimensional finite element simulation is more difficult because of the division of the vertical well and the smear area in the finite element model. In the actual simulation of the actual situation of the vacuum preloading project, the variable well resistance mathematical model is introduced in the finite element analysis, and the dimensionless parameter A_1 of the variable well resistance is given. In addition, in order to reduce the difficulty of three-dimensional finite element modeling, a suitable mesh unit is used to simplify the vertical well area, and the equivalent method is used to simplify the smear area, and the effect of applying and changing the well resistance is three. The three-dimensional finite element analysis is taken as an example. A three-dimensional finite element model is established for the analysis and calculation of the Tianjin harbor. The reasonableness of the program is verified by comparison and analysis of the calculated value and the measured data. It provides an effective method for the three-dimensional finite element simulation of the later soft foundation reinforcement engineering.

【作者单位】：中国电建集团成都勘测设计研究院有限公司造价中心;天津大学水利工程仿真与安全国家重点实验室;杭州市水利规划研究与科技推广中心;中国电建集团西北勘测设计研究院有限公司;
【分类号】：TU472.33

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