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隧道建设(中英文) ›› 2019, Vol. 39 ›› Issue (S1): 101-109.DOI: 10.3973/j.issn.2096-4498.2019.S1.015

• 研究与探索 • 上一篇    下一篇

秦岭天台山大断面高速公路隧道降尘除尘方案研究

宋斌1, 董长松1, 郭春2, 3, *, 王欣2, 3, 宋骏修2, 3   

  1. (1.中交第一公路勘察设计研究院有限公司, 陕西西安 710065; 2. 西南交通大学土木工程学院,四川成都 610031; 3. 西南交通大学 交通隧道工程教育部重点实验室, 四川成都 610031)
  • 收稿日期:2019-04-15 修回日期:2019-08-14 出版日期:2019-08-30 发布日期:2019-09-12
  • 作者简介:宋斌(1973—),男,四川巴中人,1996年毕业于西安铁路职工大学,土木工程专业,大专,工程师,现主要从事隧道工程建设技术及项目管理工作。Email: 752805869@qq.com。*通信作者: 郭春, Email: guochun@swjtu.edu.cn。
  • 基金资助:

    “十三五”国家重点研发计划 (2016YFB1200401); 教育部科技产学合作协同育人项目(201801221005); 区域公共管理信息化研究中心资助项目(QGXH18-08); 四川省教育科研资助金项目(2018495); 成都哲学社会科学规划项目(2019R44,2018R49)

Dust Reduction and Removal Schemes for Large Crosssection Tiantaishan Highspeed Highway Tunnel of Qinling Mountains

SONG Bin1, DONG Changsong1, GUO Chun2, 3, *, WANG Xin2, 3, SONG Junxiu2, 3   

  1. (1. CCCC First Highway Consultants Co,.Ltd., Xi′an 710065, Shaanxi, China;  2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China;  3. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Chengdu 610031, Sichuan, China)
  • Received:2019-04-15 Revised:2019-08-14 Online:2019-08-30 Published:2019-09-12

摘要:

为解决由于隧道施工断面大、在开挖过程中产生的粉尘难以通过施工通风排除的问题,对秦岭天台山隧道(双向6车道)施工过程中钻孔、爆破、出渣、喷浆等不同工况下的隧道粉尘质量浓度进行现场实测,并根据现场实测结果,对隧道内各工况施工粉尘分布特性进行数值模拟研究,提出适合于大断面隧道施工的粉尘控制措施。现场测试结果表明,出渣和喷浆工况下,粉尘质量浓度超过规范要求数倍。通过数值模拟得到: 1)靠近掌子面40 m区域内粉尘质量浓度不稳定,下降趋势不明显; 2)在布置风管时,风管末段至掌子面距离建议取为60~80 m,以保证新鲜风以较大的喷射面抵达掌子面; 3)建议采用附壁风筒降尘+车载除尘方案,除尘效率达95%,能有效处理隧道各区域粉尘,且对施工造成的影响小。

关键词: 大断面隧道, 施工粉尘, 降尘除尘, 数值模拟

Abstract:

The dust produced during construction of large crosssection tunnel cannot be easily exhausted by construction ventilation. Hence, field monitoring is carried out on dust concentration under conditions of drilling, blasting, mucking, spraying, etc.; the dust distribution characteristics under different constructions are numerically simulated according to monitoring data; and the dust control measures for large crosssection tunnel construction are put forward. It is showed that the dust concentrations under mucking and spraying exceed limit much. It is concluded by numerical simulation that: (1) The dust concentration in the area 40 m close to the excavation face is unstable, the downward trend is not obvious. (2) In order to ensure that the fresh air arrives at the excavation face with a larger spray surface, the distance between duct pipe end to excavation face is recommended to be 60 to 80 m when arranging the ventilation pipes. (3) It is recommended to use the wallhung wind pipe dust reduction + vehiclecarried dust removal scheme, whose dust removal efficiency can reach 95%, and which can effectively reduce the dust concentration in various areas of the tunnel, and has little impact on construction.

Key words: large crosssection tunnel, construction dust, dust reduction and removal, numerical simulation

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