基于耐久性要求的大体积混凝土贯穿裂缝化学灌浆工艺优化研究
董宏波1班勇婷2毛江鸿3张军3郑博宇3樊玮洁3蒋静3
Study on Process Optimization of Mass Concrete Through Crack Chemical Grouting Based on Durability Requirements
DONG HongboBAN YongtingMAO JianghongZHANG JunZHENG BoyuFAN WeijieJIANG Jing
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作者信息:1.宁波市建设工程安全质量管理服务总站，315099，宁波
2.宁波市轨道交通集团有限公司，315111，宁波
3.浙大宁波理工学院，315199
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Affiliation:Ningbo Construction Engineering Safety and Quality Management Service Center, 315099, Ningbo, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.01.019
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中图分类号/CLCN:TU755.7
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栏目/Col:研究报告
摘要:
化学灌浆工艺影响裂缝修复质量，若修复材料没有包覆钢筋时则存在腐蚀环境下的高锈蚀风险。依据现行操作规程进行混凝土裂缝化学灌浆时常出现复漏现象，表明腐蚀环境下混凝土结构的耐久性难以保障。通过试验分析了工程中常用的钻孔灌浆工艺的灌浆修复效果，并从耐久性保障角度出发，分别从钻孔间距和钻孔深度进行灌浆工艺优化试验。试验结果表明，缩短钻孔间距和增加钻孔深度有助于提升灌浆效果，其中钻孔深度为灌浆料极限覆盖深度值的关键因素，并基于耐久性指标要求提出了相应的工艺要求。
Abstracts:
The chemical grouting process affects the quality of crack repair, and there is a high risk of corrosion in a corrosive environment when the repair material is not covered with reinforcing steel. Leakage often occurs after concrete crack chemical grouting with current operation specifications, indicating that the durability of concrete structures is not guaranteed in a corrosive environment. The grouting repair effect of borehole grouting technique commonly used in engineering is analyzed through experiments. From the perspective of durability guarantee, the grouting process optimization test is conducted in terms of borehole spacing and borehole depth. The results show that shortening borehole spacing and increasing borehole depth can help improving the grouting effect. The borehole depth is the key factor for the grouting material coverage depth value limit. The corresponding process requirements are also proposed based on the durability index requirements.
引文 / Ref:
董宏波,班勇婷,毛江鸿,等.基于耐久性要求的大体积混凝土贯穿裂缝化学灌浆工艺优化研究[J].城市轨道交通研究，2022，25（1）：97.
DONG Hongbo,BAN Yongting,MAO Jianghong,et al.Study on Process Optimization of Mass Concrete Through Crack Chemical Grouting Based on Durability Requirements[J].Urban mass transit，2022，25（1）：97.
DONG Hongbo,BAN Yongting,MAO Jianghong,et al.Study on Process Optimization of Mass Concrete Through Crack Chemical Grouting Based on Durability Requirements[J].Urban mass transit，2022，25（1）：97.
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