ESTIMATION OF HYDROTHERMAL CONDITION IN CONCRETE MANHOLE FOR INFORMATION NETWORK BY INTEGRATED HEAT TRANSFER ANALYSIS OF SOIL AND STRUCTURES

Abstract

 An integrated heat transfer analysis of manhole and soil was conducted to predict hydrothermal condition and condensation in manhole, which affects deterioration process of manhole for information network. It was verified that time-dependent change of temperature in manholes in various region in Japan can be simulated. Based on the results of heat transfer analysis, occurrence of condensation was predicted. Water content was calculated by moisture transfer analysis in concrete, in which capillary suction of condensed water. It was clarified that condensation likely occur in manhole in winter and accordingly water content in concrete become higher in winter, which might accelerate corrosion of reinforcement in concrete.