Development of a Differential Frost Heave Model: Application to Patterned Ground Formation

差异冻胀模型的开发：在图案地层中的应用

• 批准号: 9321405
• 负责人: William Krantz
• 金额: $ 18.82万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1999-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9321405&HistoricalAwards=false
• 关键词: Development; Differential; Frost; Heave; Model

This award supports a project to extend predictive frost heave models to full 3-D forms in an effort to better understand the processes involved in development of patterned ground, such as earth hummocks, that occurs in periglacial environments. Of the 19 mechanisms thought to be important, either singly or in combination, for formation of patterned ground, only two have been incorporated into mathematical models. The objectives of this work are: 1) to use published laboratory frost-heave data to test a simplified form of the 1-D secondary frost-heave model of O Neill and Miller which can be generalized to 3-D; 2) to ascertain the ability of a new differential frost-heave model based on this simplified form of the O Neill and Miller model to describe earth hummocks whose relevant properties have been characterized; 3) to refine this differential frost-heave model based on the laboratory and field observations; and 4) to explore the applicability of this model to describe features of other forms of patterned ground. In addition to improving models of periglacial processes, this work will benefit researchers correlating ancient geomorphic features with past climate as well as engineers developing construction projects in periglacial regions.

该奖项支持一个项目，将预测性冻胀模型扩展到全三维形式，以更好地了解冰缘环境中发生的图案化地面（如土丘）的发展过程。 在19种被认为是重要的机制中，无论是单独的还是组合的，对于图案化地面的形成，只有两种被纳入数学模型。 本工作的目的是：1）利用已发表的室内冻胀试验数据，检验O Neill和米勒的一维二次冻胀模型的简化形式，并将其推广到三维; 2）确定一种新的差别霜冻的能力-基于这种简化形式的O Neill和米勒模型来描述土丘的升沉模型，其相关特性已被表征;（3）根据室内和现场观测结果，对差分模型进行改进;（4）探讨差分模型在描述其它形式的图案化地基特征方面的适用性。 除了改进冰缘过程的模型外，这项工作还将有利于研究人员将古代地貌特征与过去的气候联系起来，以及工程师在冰缘地区开发建设项目。