[1]张建文,付正道.双排桩加固滑坡桥基模型试验与数值模拟研究[J].高速铁路技术,2019,10(03):30-36.[doi:10.12098/j.issn.1674-8247.2019.03.007]
　ZHANG Jianwen,FU Zhengdao.Model Test and Numerical Simulation of Bridge Foundation with Front and Rear Anti-slide Piles in Landslide Section[J].HIGH SPEED RAILWAY TECHNOLOGY,2019,10(03):30-36.[doi:10.12098/j.issn.1674-8247.2019.03.007]
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双排桩加固滑坡桥基模型试验与数值模拟研究()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
10卷
期数:
2019年03期
页码:
30-36
栏目:
理论探索
出版日期:
2019-06-28

文章信息/Info

Title:
Model Test and Numerical Simulation of Bridge Foundation with Front and Rear Anti-slide Piles in Landslide Section
文章编号:
1674—8247(2019)03—0030-07
作者:
张建文;  付正道
1. 中铁二院工程集团有限责任公司, 成都 610031;
2. 西南交通大学, 成都 610031
Author(s):
ZHANG Jianwen;  FU Zhengdao
1. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China;
2. Southwest Jiaotong University, Chengdu 610031, China
关键词:
桥梁基础|抗滑桩|模型试验|数值模拟
Keywords:
bridge foundation|anti-slide pile|model test|numerical simulation
分类号:
U213.1+52.1
DOI:
10.12098/j.issn.1674-8247.2019.03.007
文献标志码:
A
摘要:
滑坡段桥梁基础常采用抗滑桩作为支挡结构，但针对此类工况的研究成果却少见发表。目前，滑坡段桥基设计一般不考虑抗水平荷载作用，水平荷载常通过设计抗滑桩来承担，而实际上抗滑桩和桥基是相互作用的。文章以成兰铁路九寨沟双线大桥为研究背景，进行前后排抗滑桩支护滑坡桥基的模型试验，分析在前后两排抗滑桩的作用下桥基的变形情况和受力特性，并基于FLAC 3D软件讨论了不同埋置位置下双排抗滑桩对桥基的影响。结果表明：（1）后排抗滑桩水平的变形产生了较大的荷载作用于桥基上，且集中在承台附近；（2）数值模拟下的桥梁基桩受力特性与室内模型试验测试数据较为符合，证明了数值模拟的可行性；（3）后排抗滑桩和桥基之间有一个最佳距离，能起到充分减小桥基水平变形的作用，而前排抗滑桩应靠近桥基方能有效发挥其支护效果。
Abstract:
Although anti-slide piles are often used as retaining structure for bridge foundation in landslide section, few of research results have been published in the journal. At present, the anti-horizontal load is generally not considered in the design of bridge foundation in landslide section, and the horizontal load is usually borne by anti-slide pile. In fact, the anti-slide pile and the bridge foundation are interacted. Taking Jiuzhaigou double-line bridge of Chengdu-Lanzhou Railway as research background, this paper carries out the model test of the bridge foundation with front and rear anti-slide piles in landslide section, analyses the deformation and stress characteristics of the bridge foundation under the action of the front and rear anti-slide piles, and discusses the influence of the double-row anti-slide piles on the bridge foundation under different buried positions based on FLAC 3D software. The results show that:(1) the large load produced by the horizontal deformation of the rear anti-slide pile acts on the bridge foundation and concentrates near the cap; (2) the stress characteristics of the bridge foundation pile under the numerical simulation are consistent with? the testing data of the indoor model test, which proves the feasibility of the numerical simulation; (3) there should be an optimum distance between the rear anti-slide pile and the bridge foundation, which can adequately reduce the horizontal deformation of the bridge foundation, but the front anti-slide pile should be close to the bridge foundation so as to effectively play its supporting role.

备注/Memo

备注/Memo:
作者简介:张建文(1980-),男,高级工程师。基金项目:铁道部科技研究开发计划项目（Z2012-061）引文格式:张建文, 付正道. 双排桩加固滑坡桥基模型试验与数值模拟研究[J]. 高速铁路技术,2019,10(3):30-36.ZHANG Jianwen, FU Zhengdao. Model Test and Numerical Simulation of Bridge Foundation with Front and Rear Anti-slide Piles in Landslide Section[J]. High Speed Railway Technology, 2019, 10(3):30-36.
更新日期/Last Update: 2019-06-28