ABSTRACT
Abstract Our construction office is at work on an underground railway project whose length is about 3 km, on a continuous grade separation project. The work on the underground railway is under construction. But at the beginning of the construction thermal cracking occurred at early age. So we had to examine basic ways to control thermal cracking. As a result, we could prevent thermal cracking in concrete at early ages. Here we will give an outline of construction, pre-examination and thermal records of concrete. K e y w o r d s : C P . M e t h o d , C r a c k i n g I n d e x , S t r u c t u r a l M e m b e r s ( B o x C u l v e r t ) .
