Three-dimensional in-situ small movement elasticity modulus estimations of the subsurface using a seismic technique

摘要

All civil engineering projects require information from the subsurface for design purposes. Usually this information is considered in the development of foundations of the structure. The size of the structure requires different information, mainly because foundations are smaller, shallower and located in the weathered layer for smaller structures, and deeper and larger into the base rock for larger structures. Usually collapsibility and the heaving potential play a large role in design parameters, but the small movement elasticity modulus (SMEM) is the most important constraint. Different techniques exist to measure this parameter. The most obvious one is to measure the modulus in a laboratory on an undisturbed sample. Another option recently proposed by the authors is to measure the P-wave and S-wave velocity and derive the modulus from these velocities A new approach is to use the density sounding technique to measure the small movement elasticity modulus in three directions. In this paper we present some new experimental evidence obtained by this method.