Techno Press
You logged in as. Techno Press

Advances in Concrete Construction
  Volume 16, Number 2, August 2023 , pages 79-89
DOI: https://doi.org/10.12989/acc.2023.16.2.079
 

 open access

An innovative geometry control method for short-line match precast segmental bridges
Xuzheng Liu, Huibing Xu, Jianyang Yu and Wei Quan

 
Abstract
    The occurrence of unexpected horizontal offset in the instrument or target will result in accumulated horizontal deviation in segment alignment with traditional short-line match method. A geometry control method, the four-point method, is developed for precast segmental bridges to avoid the influences of unexpected horizontal offset. The concept of the four-point method is elucidated. Furthermore, the detailed instruments and instructions are introduced. Finally, the four-point method is validated through a practical engineering application. According to the survey data, after short-line match precast construction, the vertical deviations on both sides vary between -5 mm and 5 mm in almost all segments, and the horizontal deviations vary between -4 mm and 4 mm in all segments. Without on-site adjustment, the maximum vertical and horizontal closure gaps are 12.3 and 26.1 mm, respectively. The four-point method is suggested to alleviate the issues associated with relatively poor soil conditions in casting yard.
 
Key Words
    four-point method; geometry control method; precast segmental bridges; short-line match; unexpected offset
 
Address
(1) Xuzheng Liu, Huibing Xu, Jianyang Yu:
School of Civil Engineer and Architecture, East China Jiaotong University, No.808 Shuanggang East Street, Nanchang, China;
(2) Xuzheng Liu:
State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang 330013, China;
(3) Huibing Xu:
China Railway Nanchang Group Co.,Ltd., No.7 Zhanqian Street, Nanchang, China;
(4) Jianyang Yu:
Hangzhou Chengxing Detection Co.,Ltd., No.3 Hengxin Street, Hangzhou, China;
(5) Wei Quan:
School of Civil Engineer and Architecture, Huangshan University, No.39 Xihai Street, Huangshan, China.
 
References
    -acc1602001-
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2025 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: admin@techno-press.com