| 高填方涵洞减载机制与数值分析 |
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| 引用本文： | 马强,郑俊杰,张军,赵冬安.高填方涵洞减载机制与数值分析[J].岩土力学,2010,31(Z1):424-429. |
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| 作者姓名： | 马强 郑俊杰 张军 赵冬安 |
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| 作者单位： | 华中科技大学,土木工程与力学学院,武汉430074 |
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| 基金项目： | 国家自然科学基金，教育部留学回国人员科研启动基金，山西省交通厅科技攻关项目 |
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| 摘 要： | 高填方引起的涵顶土压力集中往往造成涵顶纵向开裂,通过涵洞-填土-地基共同工作机制的研究,分析了涵洞减载的原理。通过数值模拟分析了中松侧实、柔性填料、先填后挖法以及地基处理措施对涵顶的土压力集中系数的影响。结果表明:上述方法和措施可以有效减小涵顶土压力,先填后挖法宜采用竖直边坡,开挖沟槽的宽度宜与涵洞宽度相当;涵洞地基应采用柔性处理措施,并延伸至基底以外一定的范围。研究结果可为高填方涵洞减载措施的选取以及涵洞地基设计提供参考。
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| 关 键 词： | 高填方涵洞 涵洞顶土压力 减载 数值模拟 |
| 收稿时间： | 2010-04-23 |
Mechanism analysis and numerical simulation on load reduction for culvert beneath high filling |
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| MA Qiang,ZHENG Jun-jie,ZHANG Jun,ZHAO Dong-an.Mechanism analysis and numerical simulation on load reduction for culvert beneath high filling[J].Rock and Soil Mechanics,2010,31(Z1):424-429. |
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| Authors: | MA Qiang ZHENG Jun-jie ZHANG Jun ZHAO Dong-an |
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| Institution: | College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | High filling often causes proof earth pressure concentration which leads to proof cracking, in order to obtain measures to reduce the proof earth pressure on the top of culvert, the mechanism of culvert-filling-foundation working together is studied. The earth pressure concentration factors of the culvert influencing by the effects of loose mid and real side, flexible filling, fill in after excavation, as well as the foundation treatment measures are analyzed by numerical simulation. It is shown that the measures can effectively reduce the pressure at the culvert roof, the slope of excavation should be vertical and the width of excavation should be equal to the culvert width during digging after filling. Ground treatment measures of culvert should be flexible and extend to a certain width outside the basement. The results can provide references for high-fill culvert pressure reduction and foundation design. |
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| Keywords: | high-fill culvert earth pressure at culvert roof load reduction numerical simulation |
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