Experimental research and prediction on shotcrete creep at early age

被引：0

作者：

Xie, Nan ^{[1
]}

Yang, Cheng-Yong ^{[1
]}

Ouyang, Jie ^{[1
]}

Yin, Zhi-Hong ^{[2
]}

Guo, Jun-Xiao ^{[3
]}

机构：

[1] School of Civil Engineering, Beijing Jiaotong University

[2] Inner Mongolia Jitong Railway Group, Hohhot

[3] Inner Mongolia Xiwu Railway Company Limited

来源：

Gongcheng Lixue/Engineering Mechanics | 2013年 / 30卷 / 03期

关键词：

Creep; Experimental research; Model B3; Model GL2000; Prediction model; Shotcrete;

D O I：

10.6052/j.issn.1000-4750.2012.08.0589

中图分类号：

学科分类号：

摘要：

In order to grasp the creep performance of the early-age shotcrete used for the primary lining of a tunnel, creep experiments have been carried out with two different concrete mixes that are mostly used in tunnels of subway and highway respectively by simulating a typical construction environment. The strengths, shrinkage strains and compressive strains of specimens loaded at different ages are measured and the behavior of shotcrete creep at early age is investigated. The comparison between experiment results and predictive values of GL2000 and B3 are made and the main reasons for deviations between the experimental values and predictive values are analyzed. Finally, the pertinent modifications of the key parts of GL2000 are done and a new prediction model of shotcrete creep at early age is proposed.

引用

页码：365 / 370

页数：5

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