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

膨胀岩是相对较软的岩石，当接触到水时会膨胀。由此产生的运动给隧道和露天开挖、边坡稳定性和建筑物浅基础带来了问题。人们发现，用来估计运动的技术是相当不准确的，因此，设计通常是经验主义的，产生了许多问题。这一建议包括初步努力发展实验技术，用于开发一般三维本构模型来描述这些岩石的膨胀行为。随后的研究将包括将仪器应用于实际的膨胀岩石，并希望有全尺寸的现场案例历史。

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.