Testing and Constitutive Modelling of Swelling Rocks in the Elasto-Plastic Range

弹塑性范围内膨胀岩石的测试和本构模型

• 批准号: 8719856
• 负责人: Herbert Einstein
• 金额: $ 5.96万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8719856&HistoricalAwards=false
• 关键词: Testing; Constitutive; Modelling; Swelling; Rocks

Swelling rocks are relatively soft rocks that swell when given access to water. The resulting movements cause problems in tunnels and open excavations, in slope stability problems, and with shallow foundations for buildings. The techniques that have been used to estimate movements have been found to be quite inaccurate and, as a result, designs are usually empirical, with numerous resulting problems. This proposal involves a preliminary effort to develop experimental techniques to be used in developing general three-dimensional constitutive models to describe the swelling behavior of these rocks. Subsequent research will involve application of the apparatus with actual swelling rocks and, hopefully, full scale field case histories.

膨胀岩是相对较软的岩石，当获得水时会膨胀。由此产生的移动在隧道和露天开挖中造成了问题，在斜坡稳定性问题上，以及建筑物的浅基础上造成了问题。用于估计运动的技术被发现是相当不准确的，因此，设计通常是经验性的，由此产生了许多问题。这项建议涉及开发实验技术的初步努力，用于开发描述这些岩石膨胀行为的通用三维本构模型。后续的研究将涉及到该仪器在实际膨胀岩石中的应用，并有望应用于完整的现场案例记录。