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首页> 外文会议>The art of foundation engineering practice >Performance and Design of Slab-on-grade and Pier Foundation Systems: Theoretical Considerations and Practical Applications
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Performance and Design of Slab-on-grade and Pier Foundation Systems: Theoretical Considerations and Practical Applications

机译：楼板和码头基础系统的性能和设计：理论考虑和实际应用

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The design of slab-on-grade and pier foundation systems requires knowledge of the site conditions including soil type, climatic conditions, and consideration of site anomalies. Case studies of poor performance, well-designed (in theory) slab-on-grade foundations indicate that site anomalies including subsurface perched water, pre-existing vegetation, pre-site development practices (including grading, drainage and surficial anomalies) control the designs.rnIn this study, a heuristic approach is revealed for producing guidelines to avoid substantial site anomalies that cause unexpected and unwanted foundation movement and to provide better performing slab-on-grade and pier foundation systems. The heuristic approach will also be shown to comport with simple laws of thermodynamics including the consequence of the 2~(nd) Law-the Principle of Increasing Entropy. Relative elevation surveys, unsaturated soil mechanics theory, geotechnical testing, and geo-electrical moisture material imaging resistivity surveys were used to evaluate the performance of the slab-on-grade and pier foundation systems. Exploration of the theoretical design of post-tensioned slab-on-grade foundations is provided including an analysis of the types of factors considered by most designers and a parametric analysis of slab performance under the assumed design conditions. Analysis of the design is performed using well-known industry methods including the Post-tensioning Institute's design methodology as well as finite element method analysis (FEM). The FEM program PLAXIS was used to model the soil-structure interaction mechanism. A new guideline that includes additional design considerations for a slab-on-grade and pier foundation system has been proposed based on theory and the case studies reviewed.
机译：楼板和码头基础系统的设计需要了解现场条件，包括土壤类型，气候条件以及对现场异常的考虑。性能欠佳的案例研究，设计合理（理论上）的地坪基础表明，场地异常（包括地下栖息水，既存植被，场地发展实践（包括坡度，排水和表面异常））控制着设计.rn在本研究中，揭示了一种启发式方法，可用于制定指导原则，以避免造成意外和不希望有的地基运动的大量场地异常，并提供性能更好的地坪和墩台基础系统。启发式方法还将被证明与简单的热力学定律相称，包括第二定律（增加熵的原理）的结果。相对高程调查，非饱和土力学理论，岩土工程测试和地电湿气物质成像电阻率调查被用于评估平板级和墩基础系统的性能。提供了对后张式楼板基础理论设计的探索，包括对大多数设计者考虑的因素类型的分析以及在假定设计条件下对楼板性能的参数分析。使用著名的行业方法（包括后张拉研究所的设计方法以及有限元方法分析（FEM））进行设计分析。有限元程序PLAXIS被用来模拟土壤-结构相互作用的机理。在理论和案例研究的基础上，提出了新的指南，其中包括对平板和墩台基础系统的其他设计考虑。

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