摘要
地下连续墙所处的环境以及应力状态均有别于地面建筑物,因此地面建筑物碳化深度公式不适用于地下连续墙。为了得到针对地下连续墙的碳化深度预测模型,本文对现场取制试件进行了快速碳化试验。试件取自建成已十年之久的上海地铁一号线,试验分别在20%、30%两种CO2浓度下进行。利用MAT-LAB对试验数据进行回归得到了两种地下连续墙碳化深度预测模型:随时间以及CO2浓度变化的预测模型和随混凝土抗压强度变化的预测模型。分析表明,所得碳化深度预测模型有其可靠性和实用性。
The environment and stress condition of the diaphragm wall are both quite different from those of the ground buildings, so the carbonation depth formula for ground buildings is not appropriate for the diaphragm wall. To establish proper prediction model for diaphragm wall carbonation depth, accelerated carbonation experiment of the on-the-site samples was made. The samples were taken from the first Shanghai Subway that was built for ten years, and the carbon dioxide density in the accelerated carbonation experiment was respectively 20 % and 30 %. Utilize MATLAB software to regress the carbonation depth prediction models for diaphragm wall up to the carbonation time, carbon dioxide density and carbonation strength. Results analysis shows that the formula has its dependability and practicability.
出处
《混凝土》
CAS
CSCD
北大核心
2005年第12期109-112,共4页
Concrete
关键词
地下连续墙
快速碳化试验
碳化深度
抗压强度
diaphragm wall
carbonation depth
accelerated carbonation experiment
compressive strength
