ERFORMANCE EVALUATION OF THE TUNNEL REINFORCEMENT BY MORTAR SPRAYING

Abstract

In order to verify the performance of the method of construction sprayed mortar on the lining surface partially as flaking preventive measures of the established tunnel lining concrete which deteriorated, indoor experiment and examination are performed. Push out test was carried out using the concrete board sprayed the quick-setting polymer cement mortar of three centimeters in thickness, and FEM analysis was carried out on the basis of the test result. Moreover, the simple oscillating experiment was conducted supposing a train passing immediately after the construction in a business route, and change of the adhesion intensity of mortar was checked. Consequently, efficient construction is possible and it turns out that it is satisfactory also about safety and durability.