平接缝预制块拱形骨架护坡应力位移监测研究

发布时间：2018-03-27 16:20

本文选题：护坡　切入点：拱形骨架　出处：《公路工程》2017年01期

【摘要】：依托垄茶高速公路工程边坡拱形骨架护坡试验段,对平接缝预制块拱形骨架护坡结构进行现场应力与位移监测,并与其数值模型分析结果进行比对,探讨平接缝预制块拱形骨架护坡结构的受力机理。现场试验段监测数据分析结果表明,平接缝预制块拱形骨架护坡结构随使用时间的增加:各监测点的应力、位移持续增加,直至趋于稳定;不同点位应力、位移变化规律基本一致。现场试验段监测数据与数值分析结果共同表明:平接缝预制块拱形骨架护坡结构各拱圈的拱脚处为受力不利点位;上排拱圈上点的应力小于下排拱圈上对应点应力;上排拱圈上点的位移大于下排拱圈上对应点的位移;在同一拱柱坡线上,点位竖向位移与离坡顶斜距呈非线性减少,坡顶竖向位移最大。
[Abstract]:Based on the slope arch skeleton slope protection test section of the Long-Tea Expressway project, the stress and displacement of the flat joint prefabricated block arch skeleton slope protection structure are monitored and compared with the results of its numerical model analysis. The stress mechanism of flat joint precast block arch skeleton slope protection structure is discussed. The results of monitoring data analysis of the field test section show that with the increase of service time, the stress and displacement of each monitoring point continue to increase. The monitoring data of the field test section and the numerical analysis result show that the arch foot of each arch ring of the flat joint prefabricated block arch skeleton protection structure is the unfavorable position of the force; The stress at the point on the upper row arch ring is smaller than that on the corresponding point stress on the lower row arch ring, the displacement of the point on the upper row arch ring is greater than that of the corresponding point on the lower row arch ring, and the vertical displacement of the point and the oblique distance from the top of the slope are reduced in a nonlinear way on the same arch slope line. The vertical displacement of the top of the slope is the largest.
【作者单位】：湖南省垄茶高速公路建设开发有限公司;湖南科技大学土木工程学院;
【基金】：湖南省交通厅科技计划项目(201104) 湖南省教育厅重点项目(15A065)
【分类号】：U417.12

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