公路边坡防护预制块拱形骨架结构试验

发布时间：2018-01-24 09:36

本文关键词： 边坡防护拱形骨架结构模型试验试验段监测对比分析　出处：《湖南科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：边坡防护作为高速公路工程的重要组成部分，防护形式多样，，常见的边坡防护骨架形式有传统浆砌片石拱形、人字形、方格形等，不同防护形式对边坡防护效果各有差异。本文以株洲市在建垄茶高速路段边坡为工程背景，修建边坡实体模型，探讨了不同防护形式对公路边坡防护的效果，研究的理论成果可为今后类似边坡防护提供参考，具有一定的理论意义和实用价值。本文针对公路边坡防护不同类型，修建（浆砌片石拱形骨架、平缝预制块拱形骨架、扣缝预制块拱形骨架）三种边坡实体模型，对边坡实体模型进行加载试验，通过试验所测数据分析了在边坡顶部承受相同压力作用下边坡骨架关键点位应力应变以及位移变化规律，对比分析了不同边坡防护骨架类型之间关键点位应力应变以及位移变化规律差异。其次，对在建垄茶高速公路路段边坡（平缝预制块拱形骨架）现场监测，分析边坡沉降过程中的位移及应力情况，结合室内试验与室外监测，综合分析不同防护骨架对边坡防护效果。通过分析发现，对（浆砌片石拱形骨架、平缝预制块拱形骨架、扣缝预制块拱形骨架）随着坡顶荷载的增加，三种方案沿横、竖、斜方向应变均有所增加。根据三种方案实体模型试验可知，在加载与卸载过程中三种方案均存在明显荷载效应，离坡顶越近，随着荷载增加位移变化越大。通过三种方案在加载过程中进行对比分析，其竖向应变、斜向应变、横向应变变化规律不同，拱形扣缝方案较其它方案优越。在对拱形平缝骨架防护模型现场监测数据分析了其应力与位移变化规律分析，由于现场施工条件及天气等变化情况复杂，相对室内模型实验所测结果，具有一定差异，在实际设计中应考虑施工条件及边坡沉降发展过程受外界环境因素影响。
[Abstract]:As an important part of highway engineering , slope protection is diverse , the common slope protection framework is in the form of traditional mortar rubble arch , herringbone , square and so on . Different protection forms have different effects on slope protection . In this paper , the effect of different protection forms on highway slope protection is discussed . The theoretical results of the research can provide reference for slope protection in the future , and have certain theoretical significance and practical value . In the light of different types of slope protection , three solid models of slope solid model are constructed . The stress strain and displacement variation law of slope skeleton at the top of slope under the same pressure are analyzed . Through the analysis and discovery , the three schemes increased along the transverse , vertical and oblique directions with the increase of the slope load . According to the solid model tests of the three schemes , it can be seen that there are obvious load effects in the loading and unloading process , the closer the slope top is , the larger the displacement of the load increases . Through the comparative analysis of three schemes in loading process , the vertical strain , oblique strain and transverse strain change law are different , and the arch - shaped buckling scheme is superior to other schemes . The stress and displacement variation law of arched flat seam skeleton protection model is analyzed . Due to the complexity of site construction condition and weather and so on , the result of relative indoor model experiment is different . In practical design , the construction conditions and the development process of slope settlement should be considered affected by external environmental factors .

【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U417.12

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