Temperature Control Technology for Construction of Jinsha River Bridge

The key problem of mass concrete temperature control is to effectively control the maximum temperature inside concrete, the temperature difference between inside and outside concrete, and the temperature difference between surface and environment. The size of the main tower cap of No. 3 Jinsha River...

Full description

Saved in:
Bibliographic Details
Published in:Advances in civil engineering 2021, Vol.2021 (1)
Main Authors: Jin, Hui-Wu, Wang, Guo-An, Chen, Zhan-Ming
Format: Article
Language:English
Subjects:
Bridges
Cement hydration
Civil engineering
Concrete construction
Concrete structures
Cooling
Cooling water
Cracks
Design optimization
Heat
Insulation
Mass concrete
Outlets
Prestressed concrete
Rivers
Simulation
Software
Temperature control
Temperature gradients
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The key problem of mass concrete temperature control is to effectively control the maximum temperature inside concrete, the temperature difference between inside and outside concrete, and the temperature difference between surface and environment. The size of the main tower cap of No. 3 Jinsha River Bridge is 37 m × 23.5 m × 5.5 m, and the cubic volume of concrete reaches 4782.3 m3, which is poured in two times. In order to ensure construction quality of mass concrete structure, prevent the large mass concrete temperature stress, through the numerical simulation of the temperature control and optimization scheme, by optimizing the mixture ratio design, reducing the temperature of concrete pouring into the mold, cooling water cycling, insulation keeping in good health and a series of measures to effectively achieve the control goal, and eliminating the temperature cracks. The measured data show that the maximum temperature inside concrete, the temperature difference between inside and outside, and the temperature difference between surface and environment are qualified, but the temperature difference control of cooling water inlet and outlet has hysteresis effect, and the temperature difference between inlet and outlet will be greater than 10°C, which should be noticed.
ISSN:1687-8086
1687-8094
DOI:10.1155/2021/3452167