[1]邓友生,孟丽青,蔡梦真,等.水泥土搅拌桩加固黄土路基稳定性研究[J].郑州大学学报(工学版),2022,43(03):59-66.[doi:10.13705/j.issn.1671-6833.2022.03.009]
　DENG Yousheng,MENG Liqing,CAI Mengzhen,et al.Research on Stability of Loess Roadbed Reinforced with Cement-soil Mixing Piles[J].Journal of Zhengzhou University (Engineering Science),2022,43(03):59-66.[doi:10.13705/j.issn.1671-6833.2022.03.009]
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水泥土搅拌桩加固黄土路基稳定性研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年03期
页码:
59-66
栏目:
出版日期:
2022-04-10

文章信息/Info

Title:
Research on Stability of Loess Roadbed Reinforced with Cement-soil Mixing Piles
作者:
邓友生; 孟丽青; 蔡梦真; 孙雅妮; 李龙; 郑云方
西安科技大学建筑与土木工程学院;

Author(s):
DENG Yousheng;  MENG Liqing;  CAI Mengzhen;  SUN Yani;  LI Long;  ZHENG Yunfang
College of Civil and Architectural Engineering, Xi′an University of Science and Technology, Xi′an 710054，China
关键词:
Keywords:
rainfall infiltration;  loess;  cement-soil;  roadbeds reinforcement;  ABAQUS
分类号:
TU44
DOI:
10.13705/j.issn.1671-6833.2022.03.009
文献标志码:
A
摘要:
针对黄土地区降雨入渗条件下路基稳定性问题,采用水泥土搅拌桩作为地基加固处理方法加固黄土路基。以黄土的基础土工试验和不同掺入量的粉煤灰,煤矸石改性水泥土的无侧限抗压强度测试结果作为依据,根据摩尔库伦理论和降雨入渗条件下路基的荷载-沉降原理,采用有限元分析软件ABAQUS构建降雨入渗条件下水泥土搅拌桩处理的路基模型,结合数值模拟结果,分析了水泥土搅拌桩加固黄土路基在不同的降雨时长、降雨强度和桩体弹性模量下黄土路基的荷载-沉降变化规律,讨论了黄土路基的承载特性,探索了降雨入渗对黄土路基稳定性的影响。研究结果表明:水泥土搅拌桩在降雨入渗条件下对黄土路基竖向有着明显的加强作用,路基坡脚的位移会随着降雨强度的增大及降雨时长的增长而增大在降雨强度为2 mm/h,降雨时长为18h的条件下,路面沉降随着桩体弹性模量的增大而减小桩体的弹性模量为300 MPa时,水泥土搅拌桩对黄土路基的加固效果最佳。
Abstract:
Aiming to solve the problem of the stability of roadbed in the condition of rainfall infiltration in loess area, cement-soil mixing pile was adopted as the foundation reinforcement treatment method.Based on the foundation geotechnical test of loess and the unconfined compressive strength test results of cement soil modified with different amounts of fly ash and coal gangue, according to the M-C criterion and the load-settlement principle of roadbed in rainfall infiltration conditions, the roadbed model treated with cement soil mixing pile in rainfall infiltration was constructed by using the finite element analysis software ABAQUS.Combined with the numerical simulation results, the load settlement variation law of loess roadbed reinforced with cement-soil mixing piles with different rainfall duration, rainfall intensity and pile elastic modulus was analyzed; the bearing characteristics of loess roadbed were discussed; and the influence of rainfall infiltration on the stability of loess roadbed was explored.The research results showed that the cement-soil mixing pile had a significant strengthening effect on the vertical direction of the loess roadbed in the condition of rainfall infiltration, and the displacement of the roadbed slope foot could increase with the increase of rainfall intensity and rainfall duration.In the condition that the rainfall intensity was 2 mm/h and the rainfall duration was 18 h, the road pavement settlement decreased with the increase of pile elastic modulus.When the elastic modulus of the pile was 300 MPa, the cement-soil mixing pile had the best reinforcement effect on the loess roadbed.

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更新日期/Last Update: 2022-05-02