US 12,305,344 B1
Mounting method of a main beam of a double-sided steel box UHPC composite beam cable-stayed bridge and composite beam thereof
Fanwu Zhou, Wuhan (CN); De'an Yu, Wuhan (CN); Haitao Gao, Wuhan (CN); Nannan Zhang, Wuhan (CN); Peng Liu, Wuhan (CN); Zhenghui Luo, Wuhan (CN); Run Nie, Wuhan (CN); and Xiaoke Zeng, Wuhan (CN)
Assigned to CCCC Second Harbor Engineering Company Ltd., Wuhan (CN)
Filed by CCCC Second Harbor Engineering Company Ltd., Wuhan (CN)
Filed on Jul. 10, 2024, as Appl. No. 18/769,099.
Int. Cl. E01D 21/00 (2006.01)
CPC E01D 21/00 (2013.01) 9 Claims
OG exemplary drawing
 
1. A mounting method of a main beam of a double-sided steel box UHPC (ultra-high-performance concrete) composite beam cable-stayed bridge, comprising the following steps:
S1: carrying out prestressed tensioning in a transverse direction of the bridge for all beam segments;
S2: moving a bridge deck crane forward to an end of a mounted end beam segment, and lifting a beam segment to be mounted, after the beam segment to be mounted is lifted, pouring UHPC when a wet joint between a second beam segment and a third beam segment mounted before the end beam segment is in a pre-bending state; carrying out UHPC resting during first weld seam welding between the end beam segment and the beam segment to be mounted, and initially tensioning a stay cable after the resting is completed;
S3: initially matching and positioning the end beam segment and the beam segment to be mounted;
S4: tensioning a n-th stay cable corresponding to the beam segment to be mounted for the first time, completely unloading the bridge deck crane, and placing a spreader of the bridge deck crane on the beam segment to be mounted, wherein weights of the beam segment to be mounted and the spreader are born through the n-th stay cable;
S5: mounting matching parts from an area with a small deformation height difference between the end beam segment and the beam segment to be mounted to an area with a large height difference for rectification, and carrying out whole section welding on the end beam segment and the beam segment to be mounted; and
S6: tensioning the n-th stay cable for the second time to a designed cable force, wherein the designed cable force is obtained through backward calculation according to an unstressed length of the stay cable when the bridge is completed, and an unstressed length of the n-th stay cable reaches an unstressed length of the stay cable in a final completed bridge state after the n-th stay cable is tensioned for the second time.