Identification of techniques for monitoring strains in the 72-inch diameter shaft liner for the exploratory shaft at Hanford

A series of finite element models were used to predict the distribution of hoop and axial strains that would occur in the 72-in. ID ring stiffened shaft liner during installation. The finite element results were used to determine the optimal instrumentation locations for monitoring the behavior of the ES liner. In addition, the results provide predictive values for comparison with the actual field data during installation, grouting, and dewatering of the shaft. An additional model was prepared for simulating the time-dependent behavior of the basalt surrounding the ES shaft and the resulting loads. Because no time-dependent data for the Hanford basalt is available, the intent of the model is to provide a tool for understanding any observed strains in the ES liner that occur after grouting of the annulus and dewatering of the shaft