Yunnan provincial highway reinforcement
crack repaired
In 2015, the structural cracks appeared in the bridge, it has been decided that the new advanced technology: pre-stressed CFRP laminate system was used to restrict the development of the cracks and enhance the bearing capacity of the cracks.
Engineering survey
Zhaotong City, Yunnan Province, persimmon dam to the two road (hereinafter referred to as Feng Zhu Shi Feng highway) is a part of the highway network construction in three counties and one district of Zhaotong City, located in the eastern part of Zhaotong city in Yunnan Province, west of Yanjin persimmon two mouth, check in is under construction in Zhenxiong County Feng Zhu to the prestige of two public road, route length about 61.69 kilometers, all along the river to open two highway. The whole line contains the intersection of 27, 6, 146 culvert tunnel, bridge 1, bridge 14, bridge 16.
In 2015, the cracks were repaired in the bridges.
Strengthening time
August 2015
Reinforcement method
Reinforcement of prestressed CFRP laminate
Reinforcement material
HM prestressed carbon fiber reinforced polymer(CFRP) laminate, anchorage, HM-30 carbon fiber cloth
(pre-stressed fiber reinforced polymer CFRP laminate system)
(pre-stressed fiber reinforced polymer CFRP laminate and anchoring head)
Prestressed CFRP laminate operatation process
location and paying off
polish
drilling hole
grooving
repairing and leveling
planting anchor
installing bounding box
installing anchor block
fixing carbon fiber laminate
fixing jack and high strength anchor bolt
prestretching
applying epoxy resin
prestretching
removing the thread rod
tablet fixing
finished product protection