同心荷载作用下不同桩长对土应力及钉板路面体系内力影响的考虑

A. Puri, Roza Mildawati, M. Solihin
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引用次数: 0

摘要

钉板铺装体系的同心荷载引起土体应力和结构构件内力。由结构单元传递给土体的荷载应力在体系下趋于集中在中心线区域。由于荷载应力集中在中线区域,因此系统中心的土应力和内力可能更高。为减小土体应力和结构构件内力,可将较长的桩置于体系中心区域。本研究旨在了解在钉板铺装体系中心区域放置较长桩时,其土应力及内力特性。最大双轮载荷为50 kN,通过接触压力传递到板坯表面。车轮荷载被加载在板的中心。钉板材料性能和软土性能均采用前人研究成果。钉板中心区域桩长比其他区域长33.3%。结果表明:中心区域采用长桩钉板可显著降低土体应力,最大剪应力可达28%;内力减小43% ~ 46%,桩端侧挠度减小37%。可以得出,增加体系中心区域桩长可以减小土体应力和体系内力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Consideration of the Different Pile Length Due to Soil Stress and Inner Forces of the Nailed-slab Pavement System under Concentric Load
: Concentric loading on the Nailed-slab Pavement System causes stress in the soil and the inner forces in structural elements. The load stress is transferred to the soil by the structural elements tends to concentrate in the centerline area under the system. Since load stress is concentrated in the center line area, the soil stress and inner forces can be higher in the center of the system. To reduce the soil stress and inner forces of structural elements, the longer pile can be put in the center area of the system. This research is aimed to learn the soil stress and inner forces behavior of the Nailed-slab Pavement System in case putting the longer pile in the center area of the system. The maximum double wheel load was taken 50 kN which transfer to the slab surface by contact pressure. Wheel load was loaded in the center of the slab. The Nailed-slab materials properties and soft clay properties were taken from the previous researcher. The piles in the center area of the Nailed-slab were longer 33.3% than others. Results show that the Nailed-slab by longer piles in the center area can reduce the soil stress significantly for maximum shear stress up to 28%. The inner forces were also reduced by about 43% to 46% and caused the reducing in lateral deflection of pile tip about 37%. It can be concluded that the increasing pile length in the central area of the system can reduce soil stress and inner forces of the system.
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