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In order to improve the understanding of the fundamental mechanism of rainfall infiltration induced landslides in accumulation
slope and to clarify some important characteristics of slope performance, artificial rainfall simulation tests and field synthetic
monitoring were carried out on a typical accumulation slope of Shangrui Freeway in Guizhou Province, China. The monitoring
results show that the most accumulation landslides caused by rainfall infiltration are shallow relaxation failure, whose deformation
zone lies within the top 0–4 m soil layer. The deformation of slope gradually reduces from the surface, where the greatest
deformation lies in, to the deep part of slope. The average percentage of infiltration during the first 2 h is 86%, and then
it reduces gradually with time because of the increase of the surface runoff. The average percentage of infiltration drop
to a relatively stable value (50%) after 6 h. Rainfall infiltration causes obvious increase of pore-water pressure, which
may result in a reduction of shear strength due to a decrease in effective stress and wetting-induced softening. The double-effect
of rainfall infiltration is the main reason of rainfall infiltration induced landslides in accumulation slope.
Foundation item: Project(50678175) supported by the National Natural Science Foundation of China 相似文献
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秦波赵玄刘朝晖刘雪松王宏贵黄列夫 《水电站设计》2022,(2):41-45
以实际工程项目某特大桥为背景,重点介绍了该桥孔跨布置、结构形式的选择、拱轴线选型、主拱断面及结构形式、横撑形式及布置、主梁结构及桥面板形式以及耐候钢在主拱和主梁的应用,验证了钢管混凝土拱桥在各方面所展示的优越性能。 相似文献
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目的了解荆州市学校及城区居民生活饮用水卫生状况,防止水源性传染病的爆发流行提供科学依据。方法对长江宝塔湾、自来水厂、荆州市区内学校和家庭等多处水源进行抽样调查和水质监测,并对其结果进行分析。结果长江宝塔湾水源水10项指标均符合GB/T3838-2002《地表水环境质量标准》中Ⅲ类标准。经自来水公司处理后出厂水基本符合GB/T 5749-2006《生活饮用水卫生标准》,但浑浊度和COD分别达到1.4 NTU和4.1 mg/L,达到受水源和净水条件限制时要求。5个校区、3个家庭不同时段的龙头水检测指标基本符合国家标准,2所校区卫生间水源的菌落总数分别达到90 CFU/m L和98 CFU/m L,已经接近国标规定的100 CFU/m L。本次检测6个水样的氨氮其中4个不合格,不合格率为67%。结论荆州城区居民生活饮用水存在安全隐患,尤其是氨氮含量,建议有关部门加强管理,提高质量。 相似文献
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