Rock hydromechanical parameters for rock foundation design: A database approach

Rock sockets are often constructed in weak rock masses. Understanding the hydromechanical properties of the rock mass is required for the successful design and performance of the rock sockets. This chapter establishes separate databases for the hydromechanical properties of rock masses, with particular attention to weak shales and mudstones. The databases include information on rock socket geometry, load–displacement response, and the rock mass properties and mechanical and transport properties of the rock. The chapter then reviews the available models for the prediction of (i) the axial resistance (compression or uplift), (ii) axial deformation, and (iii) permeability. The databases are used to evaluate the existing predictive models for hydromechanical properties of rock as related to the design of rock sockets. The load test databases are also used to evaluate the effect of rock mass variability on the reliability of the foundations in weak rock. Based on the results of the analysis presented, the applicability of the existing models and approaches to the study of socket behavior in weak rocks is discussed.