| 摘要 |
<P>PROBLEM TO BE SOLVED: To control a concrete temperature near the construction joint surface of a rising part and to suppress generation of cracks by installing a cooling pipe near the construction joint surface of a foundation part and the rising part and making air or liquid pass through the cooling pipe in the construction of an RC structure. <P>SOLUTION: Generally, tensile stress generated in the concrete of the rising part of the RC structure becomes largest in a range near the construction joint surface from the result of three-dimensional temperature stress analysis. When a temperature rise by hydration reaction of the concrete in the range near the construction joint surface of the rising part is lowered, the result of analysis capable of suppressing the rise of the tensile stress is attained. Several cooling pipes are installed in the range near the construction joint of the rising part, air or liquid is made to pass through the cooling pipes, the concrete temperature rise around the cooling pipes is suppressed, and the generation of cracks due to the temperature stress of the RC structure with lower part restriction is suppressed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
