土工基础

›› 2014, Vol. 28 ›› Issue (6): 83-86.

• 工程实录 • 上一篇    下一篇

粉喷桩复合地基沉降预测的改进灰色模型

李 洋   

  1. （湖北省交通规划设计院，武汉 430051）
  • 收稿日期:2014-02-18 出版日期:2014-12-25 发布日期:2015-01-12
  • 作者简介:李 洋（1981-），女，硕士，工程师，研究方向为公路设计及研究。

Modified Gray Model Settlement Predictions of HighwayEmbankment Improved by DCM Columns

LI Yang   

  1. (Hubei Communication Planning and Design Institute, Wuhan, 430051)
  • Received:2014-02-18 Online:2014-12-25 Published:2015-01-12

摘要： 高速公路粉喷桩复合地基的沉降预测不仅可以反映路基的沉降发展趋势，而且可以通过预测的沉降量来反映出路基的加固效果及稳定性，为后续工序的开展提供指导。以某高速公路粉喷桩复合地基预压期的监测结果为例，运用改进的灰色模型建立非等时距的GM（1,1）预测模型，并用后验差法对其预测精度进行检验。结果表明，改进的灰色模型的预测精度较高，能作为粉喷桩复合地基沉降预测的一种方法。

关键词: 粉喷桩复合地基, 灰色预测模型, 非等时距, 沉降预测

Abstract: The highway embankment settlement prediction of the Deep Cement Mixed (DCM) column improved ground can not only reflect the embankment settlement accumulations but also be used to evaluate the effectiveness of the soil improvement as well as the stability of the improved embankment. As a result, the settlement prediction has received an increase attention. This paper presents the case study of the settlement prediction work for the DCM improved highway embankment. A modified gray prediction by using nonequally time interval GM(1,1) model was used in the analysis and the results are verified by the observed data. It is concluded that this modified model can provide a satisfactory settlement prediction for the DCM improved highway embankment.

Key words: Composite Ground by Deep Cement Mixed Columns, Gray Model, NonEqually Time Interval, Settlement Prediction