高速公路软土路基沉降监测及预测研究
Research on Settlement Monitoring and Prediction of Soft Soil Roadbeds on Highways
吴元玮1
作者信息
- 1. 福建省高速公路集团有限公司莆田管理分公司,福建 莆田 351100
- 折叠
摘要
文中结合某一软土路基开展沉降变形预测分析,主要采用双曲线法和S曲线法拟合沉降变形.结果表明,为保证在路面所有荷载下,软土路基有充分的预压时间,预压时间不少于3 个月;S曲线可调整r的值来降低预测所产生的偏差;而运用双曲线方法对沉降进行预测时,其结果受预测时长的影响较大,如要提高预测精度,预测时采用的时长需要根据曲线变化选择在曲线反弯点后.
Abstract
In the construction process of expressway soft soil subgrade section,due to the influence of geological conditions,the road construc-tion has been seriously hindered.In this paper,combined with a soft soil subgrade settlement deformation prediction analysis,mainly using hy-perbolic method and"s"curve method to fit the settlement deformation.The results show that the preloading time is not less than 3 months in order to ensure that the soft soil subgrade has sufficient preloading time under all road loads;S curve can adjust the value of R to reduce the prediction error;The hyperbolic method is used to predict the settlement.The measured settlement time has a great influence on the prediction results.The measured settlement time must exceed the reverse bending point of the settlement process line,otherwise the reasonable prediction results can not be obtained.
关键词
软土路基/沉降预测/双曲线法/S曲线法Key words
Soft soil subgrade/Settlement prediction/Hyperbolic method/S-curve method引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据