• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2018, Vol. 38 ›› Issue (S2): 98-103.DOI: 10.3973/j.issn.2096-4498.2018.S2.014

• 研究与探索 • 上一篇    下一篇

临海环境对衬砌混凝土结构自防水性能影响研究

任辉1, 周先平1, 谭忠盛2, 刘强2   

  1. (1. 港珠澳大桥珠海连接线管理中心, 广东 珠海 519030; 2. 北京交通大学土木建筑工程学院, 北京 100044)
  • 收稿日期:2018-06-26 修回日期:2018-08-09 出版日期:2018-12-30 发布日期:2019-01-30
  • 作者简介:任辉(1986—),男,湖南常德人,2015年毕业于同济大学,隧道及地下建筑工程专业,硕士,工程师,主要从事软土隧道建设与研究工作。Email: ren445@126.com。
  • 基金资助:

    交通运输部建设科技项目(2013318J11300)

Study of the Influence of Coastal Environment on Selfwaterproof  Performance of Lining Concrete Structures

REN Hui1, ZHOU Xianping1, TAN Zhongsheng2, LIU Qiang2   

  1. (1. The Management Center of Zhuhai Link Road of Hong KongZhuhaiMacao Bridge, Zhuhai 519030,  Guangdong, China; 2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)
  • Received:2018-06-26 Revised:2018-08-09 Online:2018-12-30 Published:2019-01-30

摘要:

为获得合理的临海隧道衬砌混凝土配合比和提高混凝土自防水性能,以拱北隧道工程为背景,开展混凝土在临海侵蚀环境下的自防水性能试验研究。基于系统化的混凝土配合比设计方法确定防水混凝土初步配合比,通过碳化和硫酸盐侵蚀室内试验模拟临海环境对混凝土自防水性能的影响,对混凝土抗压强度、抗水渗透和抗氯离子渗透3个指标进行试验分析,最终获得最优配合比。结果表明: 1)复掺(20%粉煤灰+10%矿渣)混凝土自防水性能最好,该方案可作为拱北隧道主体结构混凝土配合比; 2)在碳化和硫酸盐侵蚀作用下,混凝土的抗氯离子渗透能力随时间逐渐减弱、抗压强度随时间逐渐增强; 3)混凝土掺合料对抗氯离子渗透能力的增强作用非常明显,但对混凝土后期强度增幅有一定的影响。

关键词: 临海隧道, 混凝土自防水, 混凝土配合比, 室内试验

Abstract:

In order to obtain reasonable mix ratio of coastal tunnel lining concrete and improve selfwaterproof performance of concrete,taking the Gongbei Tunnel project as background, the selfwaterproof performance study of concrete in the coastal erosion environment is carried out. The preliminary mix ratio of the waterproof concrete is determined based on systematic concrete mix ratio design method. The influence of the coastal environment on the selfwaterproofing performance of concrete is simulated by carbonation and sulfate erosion laboratory test. Through the test analysis of concrete compressive strength, water resistance and chloride ion resistance, the optimal mixture ratio is obtained. The result shows that: (1)The concrete with 20% fly ash and 10% slag has the best selfwaterproof performance, which can be used as the main structure of Gongbei Tunnel. (2)Under the carbonation and sulfate erosion, the chloride ion resistance of concrete decreases with time and its compressive strength increases. (3)The strengthening effect of concrete admixtures on chloride ion resistance is very obvious, but it has certain influence on the increase of concrete strength in later period.

Key words: coastal tunnel, selfwaterproofing of concrete, mix ratio of concrete, laboratory test

中图分类号: