Reasonable construction procedure and method of the cast-in-place RC arch rib with arch centering
Zhang Yuping , Peng Bihui , Li Chuanxi , Dong Chuangwen
DOI:10.11835/j.issn.1674-4764.2016.06.011
Received April 13, 2016,Revised , Accepted , Available online July 04, 2017
Volume ,2016,Pages 83-90
- Abstract
At present, the arch deformation is considered mainly when the engineers determinate the construction procedure for the cast-in-place RC arch with arch centering, but the arch stress is often ignored. Gan Hegou Bridge in Guizhou province is select as the case study. The positions of dividing rings sections are defined preliminarily according to original construction scheme. The simulation analysis considering the whole construction process is done by the use of MIDAS software. After the arch deformation and arch stress of various schemes are calculated and compared, reasonable construction procedure is obtained. The pouring sequence of the first arch ring is the first springer, the second vault and the last middle section. The pouring sequence of the second arch ring is the first vault, the second springer and the last middle section. The springer、vault and middle section of the third arch ring are divided into the two sections. The pouring sequence of the third arch ring are the first section of the vault、springer and middle section, then the section of the vault、springer and middle section. The pouring sequence of spandrel construction is the first vault, the second springer. The measured values of the arch deformation and stress are agreement with the calculated values. The results show the procedure and method are reasonable and reliable.