摘要
桩基-承台基础以其承载力高、沉降小,同时能够充分利用地下空间等优点,在各类建筑中得到了广泛的应用.为了探究土体弹性模量大小及其随埋深的变化关系、承台尺寸对软弱土中单桩承台基础竖向和水平承载特性的影响,以软弱土中单桩-承台系统为研究对象,利用有限元软件ABAQUS开展了一系列三维有限元分析.研究表明:弹性模量较小的土体由于其压缩性大及对桩基的约束能力较弱,单桩-桩基系统的水平和竖向承载能力均明显较小;同等土体平均弹性模量下,土体弹性模量沿埋深的分布均匀性越差,单桩-桩基系统的水平和竖向承载能力越弱;相对于水平承载能力,提升承台尺寸对提高单桩-承台系统的竖向承载能力更为明显.
Pile-cap foundation has been widely used in various buildings and structures because of its advantages of high bearing capacity,small settlement,and saving underground space.In order to explore the influence of magnitude of soil Young's modulus and its distribution pattern with soil depth,and cap size on the vertical and horizontal bearing characteristics of pile-cap systems embedded in soft ground,a suite of three-dimensional finite element analysis was carried out using the finite element software ABAQUS.The results show that the horizontal and vertical bearing capacity of the single pile-pile foundation system is significantly smaller due to the large compressibility the soil with small elastic modulus and the weak constraint on the pile foundation.Under the same average elastic modulus of soil,the worse the distribution uniformity of elastic modulus along the buried depth,the weaker the horizontal and vertical bearing capacity of single pile-pile system.Compared with the horizontal bearing capacity,increasing the size of the pile cap is more obvious to improve the vertical bearing capacity of the single pile-cap system.
作者
张磊
罗丹阳
陈成
赵寰宇
ZHANG Lei;LUO Danyang;CHEN Cheng;ZHAO Huanyu(School of Civil Engineering&Architecture,Wuhan Univ.of Technology,Wuhan 430070,China)
出处
《三峡大学学报（自然科学版）》
CAS
2022年第1期74-80,共7页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金项目(51808421)
中央高校基本科研业务费专项资金资助项目(WUT:2020Ⅲ043)。
