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| 海底隧道衬砌混凝土在多种因素下的冻融损伤 | |
| 引用本文： | 金祖权,赵铁军,侯保荣,张鹏,李秋义.海底隧道衬砌混凝土在多种因素下的冻融损伤[J].广西大学学报(自然科学版),2010,35(1). |
| 作者姓名： | 金祖权 赵铁军 侯保荣 张鹏 李秋义 |
| 作者单位： | 1. 青岛理工大学土木工程学院,山东,青岛,266033;中国科学院海洋研究所,山东,青岛,266071 2. 青岛理工大学土木工程学院,山东,青岛,266033 3. 中国科学院海洋研究所,山东,青岛,266071 |
| 基金项目： | 国家自然科学基金资助项目(50708046,50739001);;山东省教育厅项目(J08LA04);;铁道部研究计划课题(2008G031-14) |
| 摘 要： | 调查了胶州湾海底隧道衬砌混凝土面临的气候环境,提出了隧道洞口段衬砌混凝土抗冻指标要求。以水和海水为冻融介质,对标准养护和现场养护的胶州湾海底隧道衬砌混凝土施加应力比为0,25%和50%的弯曲荷载,进行快速冻融试验。研究结果表明:胶州湾海底隧道洞口段衬砌混凝土快速冻融循环次数应大于300次,且应通过防水处理提高其抗冻性能。相比于标准养护,现场养护劣化了混凝土的抗冻性能,经过300次冻融循环,混凝土质量损失和相对动弹性模量损失分别提高了1.5%和15%。海水中的氯盐和硫酸盐使得混凝土表面剥落程度增加,但内部损伤程度却相应下降。弯曲荷载劣化了混凝土抗冻性能,且随应力比增加而增加。对胶州湾海底隧道200m施工里程内混凝土抗冻性能调查表明:衬砌混凝土质量稳定,抗冻性能良好,满足设计要求。 |
| 关 键 词： | 海底隧道 衬砌混凝土 冻融损伤 弯曲荷载 |
Freeze-thaw damage of lining concrete under multi-factors in subsea tunnel |
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| JIN Zu-quan,ZHAO Tie-jun,HOU Bao-rong,ZHANG Peng,LI Qiu-yi.Freeze-thaw damage of lining concrete under multi-factors in subsea tunnel[J].Journal of Guangxi University(Natural Science Edition),2010,35(1). | |
| Authors: | JIN Zu-quan ZHAO Tie-jun HOU Bao-rong ZHANG Peng LI Qiu-yi |
| Institution: | 1. School of Civil Engineering;Qingdao Technological University;Qingdao 266033;China;2. Institute of Oceanology;The Chinese Academy of Science;Qingdao 266071;China |
| Abstract: | Jiaozhou Bay subsea tunnel is the second self-building subsea tunnel in China and the 3rd longest subsea road tunnel in the word with the designed service life over 100 years. The service environment of lining concrete in Jiaozhou bay subsea tunnel was investigated and the anti-freeze index of lining concrete in the mouth of subsea tunnel was proposed. The damage behavior of lining concrete subjected to combined action of freeze-thaw cycles and loading was investigated. The loadings with the stress ratio of... |
| Keywords: | subsea tunnel lining concrete freeze-thaw damage bend loading |
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