The thermal stress of roller-compacted concrete dams during construction

Nikolay Aniskin,Chuc Nguyen Trong,V Andreev,T Matseevich,A Ter-Martirosyan,A Adamtsevich

doi:10.1051/matecconf/201819604059

Nikolay Aniskin, Chuc Nguyen Trong + Show 4 more

Open Access

https://doi.org/10.1051/matecconf/201819604059

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Abstract

During the construction of concrete dams from rolled-compacted concrete, the main effect on the structure are the temperature effects. As a result of heat generation during hydration of cement and the influence of many other factors, significant temperature gradients and cracks may occur. In this paper, the optimal maximum temperatures arising in the body of the concrete dam under construction are determined by the method of experiment planning and the method of numerical simulation - the finite element method. The analysis of the influence of the acting factors on the temperature regime and the thermal stressed state at the rock-built concrete dam from rolled concrete is carried out. The dependences are obtained and nomograms are constructed to determine the optimal parameters. With the help of the computer program Midas Civil 2011, calculations of the temperature regime of the constructed dam were carried out and the maximum temperatures were determined. The calculations of thermal stress state of the structure along with an analysis of the possible cracking are conducted.

Highlights

Mass concrete structures are often constructed in hydraulic engineering
These are massive concrete dams, which include gravity and massive-buttress dams. They are widely used in modern hydraulic engineering construction [1,2]
The formation of the temperature regime of the constructed concrete dam is influenced by a large number of factors - climatic and technological

Summary

Introduction

Mass concrete structures are often constructed in hydraulic engineering First of all, these are massive concrete dams, which include gravity and massive-buttress dams. These are massive concrete dams, which include gravity and massive-buttress dams They are widely used in modern hydraulic engineering construction [1,2]. The temperature regime of the concrete array of the dam during its construction is formed under the influence of many factors. The object of this article is a dam with a height of 45 m This dam was built in the summer in the North of Viet Nam. This dam was built in the summer in the North of Viet Nam The climate of this region is characterized by fluctuations in air temperature from 150C in winter to 26.5oC in summer (Figure 1) [7].

Materials and methods

Conclusions