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Study on adverse effects of groundwater level rising induced by land creation engineering in hilly and gully area of the Loess Plateau

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Journal of Mountain Science 2019年第12期16卷 2739-2753页

作者： DUAN Xu DONG Qi YE Wan-jun ZHOU Jia-lin OH Erwin School of Architectural and Civil Engineering Xi'an University of Science and TechnologyXi'anShaanxi 710054China Shaanxi Science&Technology Holding Group Co. Ltd.Xi'anShaanxi 710054China State Key Laboratoiij for Strength and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'an 710049China School of Engineering Griffith UniversityGold Coast 7222Australia

Land creation projects have been implemented in China to expand urban space in mountainous *** addition to the predictable settlement brought about by filling construction,varying degrees of land subsidence and engineering failures have a demonstrated relationship to groundwater level fluctuation induced by land creation *** this work,we adopted a typical large-scale land creation project,Yan’an New City in Shaanxi province,West China,as our study *** to conducting the main experiment,preliminary field investigation and groundwater level monitoring were conducted to determine the groundwater fluctuation trend induced by land creation *** a blind drainage system was implemented,the depth aspect of groundwater level changes after large-scale land creation still needed to be *** study the degree of impact and the settlement mechanism induced by the rising groundwater level,we conducted a water immersion test(WIT)in a typical land creation site for 107 *** rising groundwater level was simulated by injecting water from the bottom of the filling *** the WIT,the soil water content,surface subsidence,and internal settlement of soil at different depths were *** subsidence development could be categorized into four stages during the water level *** second stage,which is defined as the point when the groundwater level rises to 10 m,marked the critical point in the ***,it was ascertained that the local settlement in regions that were originally composed of steep slopes is larger than that in originally flat *** addition,ground cracks and sinkholes in the study area were inspected;and it was determined that they would become new channels that would accelerate water infiltration and exacerbate the *** on the results from our field investigation and testing,several suggestions are proposed for land creation projects to mitigate issues associated with construc

关键词： water immersion test Land creation engineering Loess plateau Groundwater Subsidence

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