滨海环境地下车站侧墙混凝土抗裂防水技术研究
张坚1常伟2叶守杰2徐文1
Research on Anti-cracking and Waterproof Technology of Sidewall Concrete of Underground Metro Station under Coastal Environment Conditions
ZHANG JianCHANG WeiYE ShoujieXU Wen
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作者信息:1.1.江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室， 211103， 南京；
2.2.青岛市地铁十三号线有限公司， 266555， 青岛
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Affiliation:State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Subote New Materials Co., Ltd., 211103, Nanjing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.05.047
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中图分类号/CLCN:TU528
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栏目/Col:应用技术
摘要:
滨海环境下的青岛地铁地下车站侧墙混凝土强度与耐久性能要求高，开裂驱动力较大。为保障结构刚性防水性能、解决收缩开裂难题，建立了基于“水化-温度-湿度-约束”多场耦合机制的青岛地铁混凝土收缩开裂评估方法，定量评估了侧墙混凝土开裂风险的关键影响因素及其影响大小。在抗裂性评估基础上，提出了抗裂性施工技术方法，并基于水化速率与膨胀历程协同调控原理制备出高抗裂混凝土。最终形成集设计、材料、施工、监测于一体的抗裂成套技术，可控制混凝土开裂风险系数小于0.7。监测结果与现场观察表明，实现了侧墙良好的控裂效果。
Abstracts:
Under coastal environment conditions， the required strength and durability of sidewall concrete of Qingdao metro station are high and driving force of cracking is large. In order to ensure rigid and waterproof performance of structure and to solve shrinkage cracking problem, the evaluation method of concrete shrinkage cracking for Qingdao metro, based on multi-field coupling mechanism of “hydration-temperature-humidity-constraint”, is established, and the key influencing factors of sidewall concrete cracking risks are analyzed quantitatively. On the basis of anti-cracking performance evaluation, crack-resistant construction technical method is proposed. High crack-resistant concrete is produced based on synergistic regulation principle of hydration rate and expansion history. The complete set of crack-proof technologies integrating design, materials, construction and monitoring is formed, and the risk factor of concrete cracking can be controlled under 0.7. The field monitoring and observation results show that good crack control effect of sidewall is achieved.
引文 / Ref:
张坚，常伟，叶守杰.滨海环境地下车站侧墙混凝土抗裂防水技术研究[J].城市轨道交通研究，2021，24（5）：217.
ZHANG Jian，CHANG Wei，YE Shoujie.Research on Anti-cracking and Waterproof Technology of Sidewall Concrete of Underground Metro Station under Coastal Environment Conditions[J].Urban mass transit，2021，24（5）：217.
ZHANG Jian，CHANG Wei，YE Shoujie.Research on Anti-cracking and Waterproof Technology of Sidewall Concrete of Underground Metro Station under Coastal Environment Conditions[J].Urban mass transit，2021，24（5）：217.
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