软弱下层地基的应用

地基的好坏及处理的如何将直接影响整个建筑物、构筑物的安危，同时也是决定基础型式、埋置深度的一个极其重要的原因之一。因此为使基础有足够的强度和刚度，保证房屋建成后变形不超过允许值，不造成房屋下沉和墙身严重开裂，在设计和施工中就要首先了解工程地质情况，对复杂地基进行分析处理，

ABAQUS强度折减法分析边坡稳定性影响因素

介绍了强度折减法的基本原理,并在数值分析过程中,以位移计算的不收敛作为边坡达到极限平衡状态的标准,利用ABAQUS有限元分析软件对含有软弱夹下卧层上边坡的稳定性进行了有限元计算,分析上部与软弱下层土体的弹性模量、泊松比、密度、抗剪强度对边坡稳定性的影响,得出以下结论:土体的抗剪强度与密度对边坡稳定与滑动面的形成有着显著的影响,而泊松比与弹性模量的影响很小.

基于FLAC^(3D)强度折减法的边坡稳定性影响因素分析

结合汉宜(武汉—宜昌)高速公路某路段路堑边坡工程实例,运用FLAC3D有限差分软件对含有软弱下卧层的边坡稳定性进行数值模拟计算,探究了上部与软弱下层土体的抗剪强度、弹性模量、泊松比、密度对边坡稳定性的影响。研究结果表明,土体的抗剪强度与密度对边坡稳定与滑动面的形成影响显著,而弹性模量与泊松比的影响可以忽略不计。

Nonlinear analysis of pile load-settlement behavior in layered soil

A simplified approach is presented to analyze the single pile settlement in multilayered soil. First, a fictitious soil-pile model is employed to consider the effect of layered soil beneath pile toe on pile settlement behavior. Two approximation methods are proposed to simplify the nonlinear load transfer function and simulate the nonlinear compression of fictitious soil-pile, respectively. On this basis, an efficient program is developed. The procedures for determining the main parameters of mathematical model are discussed. Comparisons with two well-documented field experimental pile loading tests are conducted to verify the rationality of the present method. Further studies are also made to evaluate the practicability of the proposed approach when a soft substratum exists, and the results suggest that the proposed method can provide a constructive means for assessing the settlement of a single pile for use in engineering design.