| 模量对搅拌桩复合地基承载性能影响的数值研究 |
| |
| 引用本文： | 张伟丽,郭嘉,蔡健,林奕禧,黄良机.模量对搅拌桩复合地基承载性能影响的数值研究[J].水文地质工程地质,2011,38(2):67-72. |
| |
| 作者姓名： | 张伟丽 郭嘉 蔡健 林奕禧 黄良机 |
| |
| 作者单位： | 中国地质大学岩土钻掘与防护教育部工程研究中心;华南理工大学;珠海市建设工程质量监督检测站; |
| |
| 基金项目： | 国家自然科学基金资助(50878087); 珠海市科技基金(PA200310064) |
| |
| 摘 要： | 在现场试验的基础上,利用FLAC3D建立数值模拟模型,分别改变复合地基的褥垫层、持力层和桩体材料的模量,计算采用不同模量时复合地基的沉降以及桩土的应力,分析模量变化对复合地基承载力和沉降的影响规律。结果表明,褥垫层的材料和模量影响到桩间土承载力的发挥,褥垫层宜采用级配砂石,模量取值范围为20～50MPa。持力层模量增大可以提高复合地基承载力减小沉降,因此水泥土搅拌桩的桩端要进入到具有一定硬度的土层中,除软弱土外,其他土层做持力层其强度对复合地基承载力和沉降的影响不大。在一定范围内增大桩模量可以有效提高复合地基承载力减小沉降,采用水泥土搅拌桩加固软土地基时,桩的模量不要过大,建议取值范围为200～400MPa。
|
| 关 键 词： | 水泥土搅拌桩 复合地基 褥垫层 持力层 模量 |
Numerical study of the effect of material modulus upon cement-soil pile composite foundation |
| |
| ZHANG Wei-li,GUO Jia,CAI Jian,LIN Yi-xi,HUANG Liang-ji.Numerical study of the effect of material modulus upon cement-soil pile composite foundation[J].Hydrogeology and Engineering Geology,2011,38(2):67-72. |
| |
| Authors: | ZHANG Wei-li GUO Jia CAI Jian LIN Yi-xi HUANG Liang-ji |
| |
| Institution: | 1.Engineering Research Center of Rock-Soil Drilling & Excavation and Protection Ministry of Education,China University of Geosciences,Wuhan 430074,China;2.South China University of Technology,Guangzhou 510641,China;3.Zhuhai Municipal Construction Engineer |
| |
| Abstract: | Numerical simulation model was established with FLAC3D to calculate the stress of pile and soil and the settlement of composite foundation with different modulus of cushion,bearing stratum and pile.The rules of the effect of material modulus upon cement-soil pile composite foundation have been obtained.The results show that the bearing capacity of soil between piles is affected by the material and modulus of cushion,so graded joint sand is appropriate for cushion,and the range of cushion modulus is from 20M... |
| |
| Keywords: | cement-soil pile composite foundation cushion bearing stratum modulus |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《水文地质工程地质》浏览原始摘要信息 |
| 点击此处可从《水文地质工程地质》下载免费的PDF全文 |
|
