TRANSACTIONS OF THE JAPANESE SOCIETY OF IRRIGATION, DRAINAGE AND RECLAMATION ENGINEERING, Volume 188, Page 121-127 (1997)

Inspection and Construction Aimed at Preventing Wall Cracks in a Concrete Box Culvert

Masato KUNITAKE*, Fumiyoshi KONDO*, Hidehiko OGATA**, Takefumi NAKAZONO***, Hitone INAGAKI***, Nobuhiro YOSHIDA****, Hiroshi YAMASHITA*****, TakaoNAKAZAWA****** and Tadami SAKAMOTO*

* Faculty of Agriculture, Miyazaki University
** The United Graduate School of Agricultural Sciences, Kagoshima University, and
Research Fellow of the Japan Society for the Promotion of Science
*** The United Graduate School of Agricultural Sciences, Kagoshima University
**** The Graduate School of Agriculture, Miyazaki University
***** Department of Agriculture and Fisheries, Miyazaki Prefecture
***** Faculty of Engineering, Miyazaki University

Abstract

　In order to prevent thermal cracking in the wall of a concrete box culvert annexed to an agricultural road, caused by thermal stresses due to the hydration between cement and water, inspection and construction aimed at preventing such cracking were carried out in southern Kyushu district. Assuming the lower slope of the fall in temperature of the wall to prevent thermal cracking, the air temperature inside the box was raised slightly using a portable furnace for briquettes in comparison with the temperature outside the box. This preventive construction system abolished the appearance of cracks.