高速公路拓宽工程桩承式加筋路堤荷载传递与变形规律分析
Analysis of Load Transfer and Deformation Behavior in Geosynthetic-reinforced Pile-supported Embankments for Highway Widening Projects
芮瑞 1李良昊 2刘敏 3胡向东4
作者信息
- 1. 武汉理工大学基建处,武汉 430070
- 2. 武汉理工大学土木工程与建筑学院,武汉 430070
- 3. 广东省高速公路有限公司,广州 510000
- 4. 中国铁建港航局集团有限公司第一工程分公司,广州 510000
- 折叠
摘要
为深入探讨高速公路拓宽工程中的桩承式加筋路堤荷载传递与变形规律,选取一个断面开展了现场试验.通过埋设监测设备,对该断面新老路堤交接部位的桩顶和桩间土竖向土压力、路堤沉降变形进行了测试.结果表明:在加载结束后竖向荷载向新路堤产生了一定程度的扩散,导致新路堤区域土压力在等载期持续增长.工程中,桩土差异沉降较小,导致土工格室的张拉膜效应发挥程度有限.不同路堤高程处的土压力与分层沉降数据均表明,土拱效应发挥高度以及等沉面高度大致为桩间净距的1.25倍.
Abstract
In order to thoroughly investigate the load transfer and deformation behavior in geosynthetic-reinforced pile-supported embankments for highway widening projects,a section was selected for a field test.Monitoring instruments were installed to test the vertical earth pressure of the pile caps and soil between piles,as well as the settlement of pile and soil and the deformation of the embankment at the transition between the new and old embankments.The results indicate that,after loading,there is a certain degree of spreading of vertical loads towards the new embankment,resulting in contin-ued growth during the equal-load period.The differential settlement between piles and soil is relatively small,leading to limited effectiveness of the membrane effect in the geocell.Data on earth pressure and layered settlement at different em-bankment elevations indicate that the soil arching effect is approximately 1.25 times the net spacing between piles,and the settlement surface height is roughly 1.25 times the net spacing between piles.
关键词
拓宽工程/桩承式加筋路堤/现场试验/土压力/沉降Key words
widening project/geosynthetic-reinforced pile-supported embankments/field test/earth pressure/settlement引用本文复制引用
基金项目
国家自然科学基金(42272315)
中铁建港航局集团科技研发计划(2022-A02)
出版年
2024
NETL
NSTL
万方数据