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隧道建设(中英文) ›› 2023, Vol. 43 ›› Issue (S2): 41-47.DOI: 10.3973/j.issn.2096-4498.2023.S2.004

• 研究与探索 • 上一篇    下一篇

基于岩碴部分替代的早强喷射混凝土研制及应用

孙振川1, 2, 刘伟1, 2, 赵海雷1, 2, *, 王军3, 杜海文1, 刘澜洋4, 白彦磊1, 2   

  1. (1. 中铁隧道局集团有限公司, 广东 广州 511458; 2. 隧道掘进机及智能运维全国重点实验室, 河南 郑州 450001; 3. 新疆额尔齐斯河投资开发(集团)有限公司, 新疆 乌鲁木齐 830001;  4. 重庆长江电工工业集团有限公司, 重庆 400060
  • 出版日期:2023-12-30 发布日期:2024-03-27
  • 作者简介:孙振川(1972—),男,陕西韩城人,2009年毕业于石家庄铁道学院,土木与建筑专业,硕士,正高级工程师,现从事盾构TBM掘进技术与管理工作。 E-mail: szcwyf@vip.163.com。 *通信作者: 赵海雷, E-mail: 478339242@qq.com。

Development and Application of Ecological Early Strength Shotcrete Partially Prepared by Rock Debris

SUN Zhenchuan1, 2, LIU Wei1, 2, ZHAO Hailei1, 2, *, WANG Jun3, DU Haiwen1, LIU Lanyang4, BAI Yanlei1, 2   

  1. (1. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China; 2. State Key Laboratory of Tunnel Boring Machine and Intelligent Operations, Zhengzhou 450001, Henan, China; 3.  Xinjiang Erqis River Investment Development (Group) Co., Ltd., Urumqi 830001, Xinjiang, China; 4. Chongqing Changjiang Electric Industry Group Co., Ltd., Chongqing 400060, China)
  • Online:2023-12-30 Published:2024-03-27

摘要: 为解决山岭隧道施工现场岩碴大量堆积,造成资源浪费、环境破坏等问题,以西南地区某高原隧道工程为依托,研究岩碴部分替代喷射混凝土中粗骨料的可行性和实用性。基于确定的基准试验组喷射混凝土的配合比,通过唯一变量原则,开展喷射混凝土中粗骨料岩碴替代率分别为10%15%20%25%30%35%的室内试验,主要包括喷射混凝土的坍落度、黏聚性、保水性、抗压强度、抗折强度等室内试验。另外,在依托工程现场开展不同岩碴替代率的混凝土试喷工作和实体强度的大板试验。基于室内及现场试验结果,得到喷射混凝土中粗骨料的岩碴最大替代率应控制在30%以下,现场试验段隧道拱顶和边墙的喷射混凝土回弹率均满足规范要求;通过大板试验,进一步验证了岩碴对粗骨料的最大替代率应控制在30%以下的使用要求。

关键词: 岩碴, 喷射混凝土, 粗骨料, 替代率

Abstract: The accumulation of rock debris produced by mountain tunnel construction always causes resource waste and environmental damage. Therefore, the feasibility and practicality of partially replacing coarse aggregates in shotcrete by rock debris are examined based on a plateau tunnel project in the southwest China. Based on the determined benchmark experimental group of shotcrete mix proportions, indoor tests are conducted on the replacement rates of coarse aggregate by rock debris in shotcrete, 10%, 15%, 20%, 25%, 30%, and 35%, respectively, using the principle of unique variables. The tests include the slump, cohesion, water retention, compressive strength, flexural strength, etc. of shotcrete. Additionally, concrete spraying tests with different rock debris replacement rates and large plate tests of solid strength are conducted in the construction site. The indoor and onsite test results show that replacement rate of rock debris for coarse aggregates in shotcrete is better be controlled within 30%, which can guarantee the rebound rate of shotcrete in the tunnel arch and sidewalls. The large plate test further validates the recommended replacement rate.

Key words: rock debris, shotcrete, coarse aggregate, substitution rate