ESTIMATE METHOD OF STRESS IN TUNNEL SHOTCRETE LINING

摘要

A method for estimating stress in a tunnel shotcrete lining is provided to measure the stress on any shape of tunnel cross section and to reduce the measuring time and cost by not using stress sensor. A method for estimating stress in a tunnel shotcrete lining comprises a step of punching a measurement hole(1) in a shotcrete lining(10) at the measuring point of the tunnel cross section, a step of measuring the diameter of the measurement hole while performing excavation of tunnel and measuring the diameter variation of the measurement hole at each procedure of the tunnel excavation, and a step of reading the applied stress value of the shotcrete lining corresponding to the diameter variation of the measurement hole based on a database which is established based on data about the relation between the applied stress of the shotcrete lining and the diameter change of the measurement hole.