多桩型复合地基变形数值计算对比实例分析
摘要:由于某工程天然地基无法满足承载力和变形的要求，且考虑到基底下存在较厚的以粉煤灰为主的填土层的特点，故需进行地基处理。首先针对该工程提出两种不同的处理方案，通过对比分析决定采用水泥搅拌桩处理浅层填土来提高地基承载力，而利用CFG桩来加固处理深层土体以满足变形的需求。其次对上述选定的方案，应用有限元软件PLAxIS3D建立复合土层模型（模型一）和桩体置换模型（模型二）进行沉降变形分析，并将两模型的计算结果分别与沉降观测进行对比分析，从而为以后工程提供参考。
Abstract:The natural ground of a object can not meet the requirements of bearing capacity and differential settlement and there is thick filling which is based on fly ash under the foundation, so the natural ground need to be reinforced. Firstly, comparing the two different treatment schemes and considering the fly ash is good building material, the final scheme is that adopting the cement deep mixed piles to reinforce the filling layer to improve the bearing capacity of the natural ground, and using CFG piles to handle the deep soil to meet the requirement of settlement. Secondly, according the final scheme, using the finite element software PLAXIS 3D to build two models to compare and analyze the settlement, model 1:composite layer model, model 2:pile unit model. The final simulation results were compared respectively with the measurement data of settlement, and the comparison can provide some guiding significance for the future engineering.
中文标题：
多桩型复合地基变形数值计算对比实例分析
Case Study and Numerical Comparison of Deformation Based on the Composite Foundation with Different Reinforcement
作者：
殷辰鹏1,张怀静1,孙宏伟1,2
Yin Chenpeng1,Zhang Huaijing1,Sun Hongwei1,2
作者简介:殷辰鹏,1988年生,男,汉族,河北涿鹿人,在读硕士研究生,主要从事地基处理、岩土工程数值模拟等方面的研究。E-mail:2009.ycp@163.com
通讯地址：
1. 北京建筑大学, 北京 100044; 2. 北京市建筑设计研究院有限公司, 北京 100045
1.BeijingUniversityofArchitecture,Beijing100044,China; 2.BeijingInstituteofArchitecturalDesignCo.,Ltd,Beijing100045,China
中图分类号:TU472;TU433
doi:10.3969/j.issn.1007-2993.2014.02.003
出版物：岩土工程技术
收稿日期:2013-12-18
网络出版日期:2021-07-19
关键词:地基设计,多桩型复合地基,数值分析,差异沉降
Key words:geotechnical design,composite foundation with different reinforcement,numerical analysis,differential settlement
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