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工程力学  2013 

喷射混凝土早龄期徐变的试验研究及预测

DOI: 10.6052/j.issn.1000-4750.2012.08.0589, PP. 365-370

Keywords: 喷射混凝土,徐变,试验研究,预测模型,GL2000模型,B3模型

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Abstract:

为了掌握隧道初期支护喷射混凝土的早龄期徐变性能,以地铁和公路隧道最为常用的两种配合比的喷射混凝土为研究对象,模拟施工环境,对喷射混凝土的早龄期徐变性能进行试验研究,完成了不同龄期试件的强度、收缩和受压应变测试,分析了早龄期喷射混凝土徐变特点。将试验值与B3模型和GL2000模型预测值进行比较后,分析了造成试验值与模型预测值之间存在较大偏差的主要原因,有针对性的对GL2000模型的关键项进行了修正,提出了适合于早龄期喷射混凝土徐变度的预测模型。

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