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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第14卷    第1期    总第82期    2017年1月

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文章编号:1672-7029(2017)01-0038-06
路基坡面防护空心砌块几何尺寸优化设计
谢涛1,2,罗强1,2,张良1,2,蒋良潍1,2, 连继峰1,2

(1.西南交通大学 土木工程学院, 四川 成都 610031;2.高速铁路线路工程教育部重点实验室, 四川 成都 610031)

摘 要: 空心砌块常用于路基边坡的坡面防护,以防止土质边坡表层土体因降雨导致侵蚀破坏,进而保证坡面的稳定。空心砌块内松散土体在雨水渗流下的冲蚀破坏是导致砌块底部脱空、防护结构局部坍塌的主要因素。以渗透作用下表层土体稳定的临界坡角为技术参数,以防止空心砌块内土体被冲蚀为控制条件,建立空心砌块几何尺寸与砌块内土性及边坡坡度的函数关系;针对六棱空心砌块构造特点,提出维持块内土体稳定并具有设计安全储备的几何尺寸优化建议值。

 

关键字: 路基工程; 边坡防护; 表层冲蚀; 空心砌块; 几何构造

Hollow block geometry optimization design in subgrade slope surface protection
XIE Tao1,2, LUO Qiang1,2, ZHANG Liang1,2,JIANG Liangwei1,2, LIAN Jifeng1,2

1. Dept of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. MOE Key Laboratory of High-Speed Railway Engineering, Chengdu 610031, China

Abstract:Hollow block frequently be used in subgrade slope protective engineering to prevent soil erosion resulted from rainfall on slope surface, and then guarantee the stability of slope surface. The rainwater seepage destruction of loose soil erosion in hollow block are the main factors leading to block bottom cavity, local collapse of the protective structure. With the fill''''s critical slope angle as technical parameters, and with preventing soil erosion in the hollow block as control conditions, the function relationship between hollow block geometry size with the nature of the soil in hollow block the soil and slope gradient is established. The optimized geometries of the suggested values with the design safety reserve maintenance are put forward.

 

Key words: subgrade engineering; slope protection; surface erosion; hollow block; geometric structure

ISSN 1672-7029
CN 43-1423/U

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