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软基上埋式箱涵土压力的离心模型试验研究

, PP. 53-59

Keywords: 桥梁工程,上埋式箱涵,土压力,离心模型试验,差异沉降

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Abstract:

为考察软基上埋式箱涵受力特性,通过离心模型试验,研究了其竖向和侧向土压力、土压力系数随填土高度变化的规律及周围填土位移场的变化情况。试验结果表明,使用桩基的箱涵与两侧路堤产生了显著的差异沉降,并在涵洞处形成了驼峰;内外土柱差异沉降在路堤中形成了拱脚位于涵顶两侧的上凸压力拱,并使拱脚处竖向土压力集中,且竖向土压力系数随路堤填筑呈开口向下的抛物线分布,在某一涵顶路堤高度下达最大值;同时,随涵顶路堤填筑,涵洞侧向土压力和侧向土压力系数增加,由于涵侧路堤以沉降为主的位移模式与挡土墙后填土不同,涵洞侧向土压力小于现行规范值。软基上路堤、涵洞和地基的协同作用分析表明,传统的强涵基、弱地基的设计理念将使涵顶竖向土压力集中,并导致结构失效。为降低涵洞结构破坏风险,建议采用轻质填料填筑涵顶、涵洞反开挖施工和结构设计考虑涵顶竖向土压力集中等措施。

References

[1]  张涛. 软土地基上高速公路箱涵受力特性及设计研究[D]. 长沙: 长沙理工大学,2012.ZHANG Tao. Research on Force Characteristics andDesign of Highway Box Cultures on Soft Ground [D].Changsha: changsha University of Science & Technology,2012.
[2]  顾安全. 上埋式管道及洞室垂直土压力的研究[J].岩土工程学报,1981,3 (1): 3-15.GU An-quan. Investigation of the Vertical Earth Pressureon Projecting Conduit and Underground Chamber under aHigh Embankment [J]. Chinese Journal of GeotechnicalEngineering,1981,3 (1): 3-15.
[3]  MARSTON A. The Theory of External Loads on ClosedConduits in the Light of the Latest Experiments [C] ∥Proceedings of the Ninth Annual Meeting of the HighwayResearch Board. Washington,D. C. : Highway ResearchBoard,1930.
[4]  SPANGLER M G. Underground Conduits-an Appraisal ofModern Research [J]. Transactions of the AmericanSociety of Civil Engineers,1948,113 (1): 316-345.
[5]  AASHTO HB-17, Standard Specifications for HighwayBridges [S]
[6]  PIMENTEL M,COSTA P,FELIX C,et al. Behavior ofReinforced Concrete Box Culverts under High Embankments [J]. Journal of Structural Engineering,2009,135 (4): 366-375.
[7]  严东方,林从谋. 上埋式涵洞顶部垂直土压力计算方法探讨[J]. 地下空间与工程学报,2007,3 (2):245-251.YAN Dong-fang,LIN Cong-mou. Study on CalculatingMethods of Vertical Pressure on Top of Culverts[J].Chinese Journal of Underground Space and Engineering,2007,3 (2): 245-251.
[8]  李永刚,孙建生. 软基涵洞土压力分析[J]. 土木工程学报,2003,36 (6): 96-99.LI Yong-gang, SUN Jian-sheng. An Approach for theEarth Pressure of Culverts on Soft Foundation [J]. China Civil Engineering Journal,2003,36 (6): 96-99.
[9]  罗智刚,李永刚,李力. 涵洞洞顶垂直土压力的分析及计算[J]. 太原理工大学学报,2004,35 (6):735-738.LUO Zhi-gang, LI Yong-gang, LI Li. Analysis andCalculation on Vertical Loading Pressure of Soil Filled onTop of Culvert [J]. Journal of Taiyuan University ofTechnology,2004,35 (6): 735-738.
[10]  杨锡武,张永兴. 公路高填方涵洞土压力变化规律及计算方法研究[J]. 土木工程学报,2005,38 (9):119-124.YANG Xi-wu,ZHANG Yong-xing. A Study on the EarthPressure Theory for High Fill Culverts [J]. China CivilEngineering Journal,2005,38 (9): 119-124.
[11]  范鹤,范泽,王述红,等. 基于高填土涵洞相似材料模型的土压力研究[J]. 地下空间与工程学报,2008,4 (2): 285-289.FAN He, FAN Ze,WANG Shu-hong, et al. EarthPressure Study of High Filled Culvert Model with SimilarMaterial [J]. Chinese Journal of Underground Space andEngineering,2008,4 (2): 285-289.
[12]  郑俊杰,赵建斌,陈保国. 高路堤下涵洞垂直土压力研究[J]. 岩土工程学报,2009,31 (7): 1009-1013.ZHENG Jun-jie, ZHAO Jian-bin, CHEN Bao-guo.Vertical Earth Pressure on Culverts under HighEmbankments [J]. Chinese Journal of GeotechnicalEngineering,2009,31 (7): 1009-1013.
[13]  康佐,谢永利,杨晓华,等. 减荷拱涵周围土体位移变化的离心模型试验[J]. 中国公路学报,2006,19(6): 13-18.KANG Zuo, XIE Yong-li, YANG Xiao-hua, et al.Centrifugal Model Test on Displacement Variation of Earth Surrounding Reducing-load Arch Culvert [J]. China Journalof Highway and Transport,2006,19 (6): 13-18.
[14]  翁效林,谢永利,刘保健. 高填方路堤涵洞碎散体填土成拱效应离心模型[J]. 长安大学学报: 自然科学版,2008,28 (2): 31-35.WENG Xiao-lin,XIE Yong-li,LIU Bao-jian. CentrifugalModel of Arch Action of Granular Soil Fills of Culvertsunder High Embankment [J]. Journal of Chang'anUniversity: Natural Science Edition, 2008,28 (2):31-35.
[15]  侯瑜京. 离心模型试验模拟塑料排水板处理软基的试验研究[J]. 大坝观测与土工测试,1995,19 (5):18-20.HOU Yu-jing. Centrifugal Modeling of the Plastic Plank inSoft Foundation Treatment [J]. Dam Observation andGeotechnical Tests,1995,19 (5): 18-20.

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