斜坡地基高填方路堤桩基托梁挡墙受力特征研究
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摘要
针对衢宁铁路屏南车站DK324+760断面斜坡地基高填方路堤工程,为研究桩基托梁挡墙支挡结构的内部受力特征,将现场监测数据与数值模拟结果进行对比。对比结果发现:挡土墙墙背土压力呈现三角形分布,现场监测结果与数值模拟结果基本相同。另外,在基桩桩身所受的轴力、横截面剪力和弯矩的分布上,现场监测结果和数值模拟结果也呈现相同规律。
In order to study the internal stress characteristics of retaining structure of pile-supported beam with gravity retaining wall for the high fill embankment of slope section DK324+760 of Pingnan Station in Quzhou—Ningde Railway, the on-site monitoring data were compared with the numerical simulation results. The results show that the back pressure of the retaining wall presents a triangular distribution. The results of on-site monitoring and numerical simulation are basically the same. In addition, the on-site monitoring results and numerical simulation results also show the same rules for the axial force, cross-sectional shear force and bending moment distribution of the pile body.
In order to study the internal stress characteristics of retaining structure of pile-supported beam with gravity retaining wall for the high fill embankment of slope section DK324+760 of Pingnan Station in Quzhou—Ningde Railway, the on-site monitoring data were compared with the numerical simulation results. The results show that the back pressure of the retaining wall presents a triangular distribution. The results of on-site monitoring and numerical simulation are basically the same. In addition, the on-site monitoring results and numerical simulation results also show the same rules for the axial force, cross-sectional shear force and bending moment distribution of the pile body.
引文
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[2]谢涛,罗强,周成,等.高速铁路小变形下陡坡地基路肩桩板墙力学响应[J].岩土力学,2018,39(1):45-52,62.XIE T,LUO Q,ZHOU C,et al.Mechanical response of shoulder sheet-pile wall under strictly restricted deformation condition in steep ground along a high-speed railway[J].Rock and Soil Mechanics,2018,39(1):45-52,62.
[3]廖来兴.斜坡地带桩承扶壁式挡土墙的计算模型与应用研究[D].长沙:中南大学,2013.LIAO L X.On calculation model and case study of the pile-supported counterfort retaining wall on slopes[D].Changsha:Central South University,2013.
[4]张玉伟.斜陡边坡前缘挡墙主动土压力计算方法研究[D].重庆:重庆交通大学,2017.ZHANG Y W.The study of the calculation method of active earth pressure on retaining wall of inclined steep slope[D].Chongqing:Chongqing Jiaotong University,2017.
[5]董捷,张永兴,黄治云.柔性板桩板墙加固斜坡填方地基的土压力分配问题研究[J].岩土力学,2010,31(8):2489-2495,2506.DONG J,ZHANG Y X,HUANG Z Y.Study of earth pressure distribution of flexiboard sheet-pile walls used in reinforced fill foundation on ramp[J].Rock and Soil Mechanics,2010,31(8):2489-2495,2506.
[6]赖紫辉.桩基托梁挡土墙托梁受力分析[J].路基工程,2008(6):48-49.LAI Z H.Stress analysis of retaining wall beam and pile foundation beam[J].Subgrade Engineering,2008(6):48-49.
[7]万里,陈群,何昌荣,等.桩基托梁挡土墙原型观测研究[J].水电站设计,2009,21(4):82-86.WAN L,CHEN Q,HE C R,et al.Study on pile foundation trimmer beam retaining wall prototype observation[J].Design of Hydroelectric Power Station,2009,21(4):82-86.
[8]陈群,何昌荣,赖紫辉.地基情况对重力式桩基托梁挡土墙应力和变形的影响研究[C]//第三届全国岩土与工程学术大会论文集.成都:中国地质学会,中国岩石力学与工程学会,中国建筑学会,中国土木工程学会,2009:6.CHEN Q,HE C R,LAI Z H,et al.Research on the influence of foundation condition on the stress and deformation of gravity pile foundation support beam[C]//The third national academic conference on geotechnical and geotechnical engineering.Chengdu:Geological Society of China,Chinese Society for Rock Mechanics & Engineering,Architectural Society of China,China Civil Engineering Society,2009:6.
[9]陈桂兵.桩基托梁挡土墙工程应用与优化设计[D].成都:西南交通大学,2010.CHEN G B.Engineering applicationg and optimization on pile foundation-trimmer beam-retaining wall structure[D].Chengdu:Southwest Jiaotong University,2010.
[10]高志辉.桩基托梁挡土墙力学作用机理试验研究与数值分析[D].成都:四川大学,2005.GAO Z H.Experimental study and numerical analysis of mechanical behavior of pile foundation-trimmer beam-retaining wall structure[D].Chengdu:Sichuan University,2005.