Open AccessResearch on the Effect of Under-Aged Concrete Arch Grouting for Ultra-High Arch Dam in Alpine-Cold Region
Author(s) -
Li Shi,
Ying Zhang,
P. M. Huang,
Shengjie Di
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/580/1/012089
Subject(s) - arch , cracking , arch dam , geotechnical engineering , ultimate tensile strength , stress (linguistics) , geology , materials science , engineering , structural engineering , composite material , linguistics , philosophy
In order to study the concrete excessive early stress and cracking risk caused by early cooling rate after the arch grouting of the ultra-high arch dam in alpine-cold region, the effect of grouting water cooling and temperature compensation are analysed. The results show that the under-aged concrete arch grouting in the constrained area, especially the strong constrained area, cause a large tensile stress due to continuous cooling and there is a risk of cracking. In actual construction, the early concrete temperature drop rate should be strictly required. Sealing at different ages has a certain effect on the later stress process. The tensile stress is the smallest at the 90-day age, the largest at the 60-day age, and the middle-sized at the 120-day age.