The Effect of Internal Scales in Soil Behavior

内部尺度对土壤行为的影响

• 批准号: 9908390
• 负责人: JC Santamarina
• 金额: $ 16万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-10-01 至 2004-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9908390&HistoricalAwards=false
• 关键词: Effect; Internal; Scales; Soil; Behavior

***9908390SantamarinaThe behavior of soils and fractured rocks is determined by the discrete natureof these media and by the inherent presence of multiple internal scales.Indeed, it is increasingly more apparent that the mean and variance of soilparameters are not sufficient to characterize a soil mass and to predict itspotential behavior. Furthermore, subtle yet important aspects of scales andinteractions among scales need to be understood to better comprehend soilbehavior. The goal of this study is to discern unique phenomena in soils given thecoexistence of multiple internal scales (spatial and temporal), and theireffect on macroscale soil behavior. The proposed study centers on the followinggeotechnical processes: diffusion (selected because of its apparentinsensitivity to internal scales), drained stress-strain behavior, porepressure (generation, dissipation and coupling). These processes will beaddressed with integral experimental and analytical tasks. A complementaryresearch phase will be driven towards the development of engineering designprocedures.This research has the potential for the clarification and fundamentalexplanation of frequently observed behavior in geo-mechanic andgeo-environmental situations, and for the discovery of unique phenomena relatedto multiple scales and their interaction. Results from this research will guidethe development of enhanced procedures for the interpretation ofhigh-resolution site characterization data (e.g., piezo-CPT and geophysicaltests such as GPR and tomographic images). Furthermore, these results will alsopromote the development of enhanced engineering design methodologies thatrecognize multiple internal scales in global response (foundation engineering,dynamic response, contamination and remediation, petroleum geomechanics).***

* 9908390 Santamarina土壤和破碎岩石的特性是由这些介质的离散性质和内在的多尺度决定的。事实上，越来越明显的是，土壤参数的均值和方差不足以表征土体和预测其潜在特性。此外，需要了解尺度和尺度之间的相互作用的微妙而重要的方面，以更好地理解土壤行为。本研究的目的是识别土壤中的独特现象，给出了多个内部尺度（空间和时间）的共存，以及它们对宏观土壤行为的影响。建议的研究集中在以下岩土工程过程：扩散（选择，因为它明显的内部尺度敏感性），排水应力-应变行为，孔隙压力（产生，消散和耦合）。这些过程将通过完整的实验和分析任务来解决。一个补充性的研究阶段将被驱动向工程设计程序的发展。这项研究有可能澄清和基本解释在地质力学和地质环境情况下经常观察到的行为，并发现与多尺度及其相互作用有关的独特现象。这项研究的结果将指导开发用于解释高分辨率场地特征数据的增强程序（例如，piezo-CPT和地质雷达（GPR）和层析成像（Tomography）等地质学测试）。此外，这些结果还将促进增强的工程设计方法的发展，这些方法可以识别全球响应（基础工程，动态响应，污染和补救，石油地质力学）中的多个内部尺度。