Based on the construction project of Nanjing open caisson intelligent parking facility, which constructed by a new type of ultra-deep prefabricated shaft construction technology, the theoretical analysis and finite element calculation method are used to study the temperature effect of the bottoming concrete pouring of the ultra-deep shaft. The influence of temperature shrinkage on the contact surface between the bottoming concrete and the shaft structure is discussed. Combined with the engineering characteristics, reasonable design and construction control measures are proposed to provide reference for similar projects. The results show that the horizontal shrinkage deformation caused by temperature effect is more important, it can affect the contact surface between bottoming concrete and shaft structure; The theoretical calculation of the shrinkage deformation caused by the temperature effect of the bottoming concrete is basically consistent with the finite element calculation, and the maximum difference is about 8%; The shrinkage deformation of bottoming concrete caused by temperature effect will affect the shear performance and waterproof performance of the contact surface between bottoming concrete and shaft structure, and control measures should be taken.
He Tengfei
,
Wang Wenyuan
,
Guo Xinmiao
. Research on Temperature Effect of Bottoming Concrete Pouring in Ultra-Deep Shaft[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(S1)
: 310
-315
.
DOI: 10.20174/j.JUSE.2024.S1.37
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