[1]郑士忠.斜交角对台后填筑荷载下桥台地基附加应力状态的影响[J].高速铁路技术,2025,(01):42-48.[doi:10.12098/j.issn.1674-8247.2025.01.007]
　ZHENG Shizhong.Influence of Skew Angle on the Additional Stress of Abutment Foundation under the Backfill Load[J].HIGH SPEED RAILWAY TECHNOLOGY,2025,(01):42-48.[doi:10.12098/j.issn.1674-8247.2025.01.007]
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斜交角对台后填筑荷载下桥台地基附加应力状态的影响()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
期数:
2025年01期
页码:
42-48
栏目:
理论探索
出版日期:
2025-02-20

文章信息/Info

Title:
Influence of Skew Angle on the Additional Stress of Abutment Foundation under the Backfill Load
文章编号:
1674-8247(2025)01-0042-07
作者:
郑士忠1; 2
(1.中铁十九局集团有限公司, 北京 100176; 2.江苏省工程技术研究中心, 江苏 无锡 214028)
Author(s):
ZHENG Shizhong1; 2
(1.China Railway 19th Bureau Group Co., Ltd., Beijing 100176, China; 2.Jiangsu Engineering and Technology Research Center, Wuxi 214028, China)
关键词:
路桥接续;  斜交角;  台后填土;  附加应力;  偏转;  数值计算
Keywords:
bridge approach;  skew angle;  filling behind the abutment;  additional stress;  deflection;  numerical calculation
分类号:
U213.1
DOI:
10.12098/j.issn.1674-8247.2025.01.007
文献标志码:
A
摘要:
为研究路桥斜交接续对台背填土荷载下桥台基础附加应力的影响,本文基于Boussinesq理论,结合斜交路基荷载分布的几何分解,推导出任一斜交角的桥台地基附加竖向应力半解析计算式,并借助Mathematica软件对不同斜交角下桥台地基附加竖向应力分布规律进行分析; 构建FLAC3D路桥过渡段数值模型,将理论计算结果与数值模拟进行对比。研究结果表明:(1)建立的考虑斜交角的桥台地基附加竖向应力半解析计算式可行、可靠;(2)路桥接续时,随着斜交角不断增大,台后填土引起的桥台基础附加应力偏转越严重,导致桥台出现不均匀沉降和偏斜现象,建议路桥在软土高填方地区接续时应尽量减小斜交角。
Abstract:
To study the effect of subgrade-bridge oblique intersection on the additional stress of the bridge abutment foundation under the backfill load, this paper derived a semi-analytical calculation formula for the additional vertical stress of the bridge abutment foundation at any oblique angle based on Boussinesq's theory and the geometric decomposition of load distribution on skewed subgrades. The distribution pattern of additional vertical stress in abutment foundations under different skew angles was analyzed using Mathematica software. A FLAC3D numerical model of thesubgrade-bridge transition section was established to compare the theoretical calculations with numerical simulations. The research findings indicate that:(1)The semi-analytical formula for calculating additional vertical stress in abutment foundations, considering the oblique angle, is feasible and reliable.(2)As the oblique angle increases, the deflection of additional stress in the abutment foundation caused by backfill becomes more severe, leading to uneven settlement and inclination of the abutment. Therefore, it is recommended to minimize the oblique angle when connecting roads and bridges in areas with high fill in soft soil.

参考文献/References:

[1] LI D, OTTER D, CARR G. Railway Bridge Approaches under Heavy Axle Load Traffic: Problems, Causes, and Remedies[J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2010, 224(5): 383-390.
[2] 谷存雷, 袁报, 李宁, 等.日兰高速铁路联络线引入工程的路基优化研究[J]. 高速铁路技术, 2023, 14(5):100-104,116.
GU Cunlei, YUAN Bao, LI Ning,et al.A Study on Subgrade Optimization for Rizhao-Lanzhou High-speed Railway Connection line[J].High Speed Railway Technology, 2023,14(5):100-104,116.
[3] 蒋关鲁, 王力伟, 杭红星. 基于离心模型试验的路桥变形耦合特性数值模拟研究[J]. 土木工程学报, 2012, 45(8): 148-157.
JIANG Guanlu, WANG Liwei, HANG Hongxing. Numerical Simulation of Centrifuge Model Test on the Coupling Characteristics of Bridge Approach[J]. China Civil Engineering Journal, 2012, 45(8): 148-157.
[4] 蒋关鲁, 王力伟, 杭红星. 路桥交界处地基附加应力修正计算方法[J]. 岩土工程学报, 2013, 35(2): 208-218.
JIANG Guanlu, WANG Liwei, HANG Hongxing. Modified Method for Additional Stress of Bridge-approach Foundation under Subgrade Load[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(2): 208-218.
[5] 杨奇, 冷伍明, 邓宗伟, 等. 桥台地基附加竖向压应力通用计算公式[J]. 岩土力学, 2008, 29(3): 833-837.
YANG Qi, LENG Wuming, DENG Zongwei, et al. Universal Calculation Formula of Additional Vertical Stress under Bridge Abutment Due to Embankment and Conical Slope[J]. Rock and Soil Mechanics, 2008, 29(3): 833-837.
[6] 罗强, 谢宏伟, 李安洪, 等. 无砟轨道底座板离缝对路桥过渡段动力学性能影响分析[J]. 高速铁路技术, 2021, 12(2): 33-38, 49.
LUO Qiang, XIE Hongwei, LI Anhong, et al. Analysis on the Impact of Ballastless Track Base Slab Disjoint on the Dynamic Performance of Subgrade-bridge Transition Section[J]. High Speed Railway Technology, 2021, 12(2): 33-38, 49.
[7] 肖东. 邻近(连接)桥梁桩基础与高铁路基耦合变形研究[D]. 成都: 西南交通大学, 2019.
XIAO Dong. Study on Coupling Deformation between Neighboring or Connecting Bridge Pile Foundation and High Speed Railway Embankment[D].Chengdu: Southwest Jiaotong University, 2019.
[8] 肖东, 蒋关鲁, 林展展, 等. 过渡段地基加固作用对桥台桩工作性状的影响分析[J]. 中南大学学报(自然科学版), 2017, 48(3): 820-829.
XIAO Dong, JIANG Guanlu, LIN Zhanzhan, et al. Analysis on Working Properties of Abutment Piles Considering Foundation Reinforcement of Approach Embankment[J]. Journal of Central South University(Science and Technology), 2017, 48(3): 820-829.
[9] XIAO D, JIANG G L, LIAO D, et al. Influence of Cement-fly Ash-gravel Pile-supported Approach Embankment on Abutment Piles in Soft Ground[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2018, 10(5): 977-985.
[10] 刁云峰, 刘玉玲, 崔素花. 公路路基结构下穿高速铁路桥梁可行性研究[J].高速铁路技术, 2024, 15(5):100-106.
DIAO Yunfeng,LIU Yuling,CUI Suhua.Feasibility Study on Road Subgrade Structure Crossing beneath a High-speed Railway Bridge[J].High Speed Railway Technology, 2024, 15(5):100-106.

备注/Memo

备注/Memo:
收稿日期:2023-07-13
作者简介:郑士忠(1974-),男,高级工程师。
基金项目:中铁十九局集团有限公司科技发展计划(22-B06)
更新日期/Last Update: 2025-02-20