海底隧道三洞并行施工通风方案优化研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1397 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: At present, aiming at the diffusion law of harmful gas in drilling and blasting construction, there are more studies on single tunnel blind heading, but the ventilation scheme of 3 holes parallel construction is rarely studied. In order to explore the optimal ventilation scheme for the parallel construction of the three-hole subsea tunnel and optimize the fan arrangement, based on the second subsea tunnel in Qingdao-Jiaozhou Bay, this paper focuses on the pollutant transport law of 3 holes parallel construction in the drilling and blasting section in the sea area. In this paper, the 3D model of 3 holes parallel-double large section main tunnel + small section service tunnel-are established. The CO concentration distribution after tunnel blasting is simulated by the 3D turbulent RNG k-ε model and component transport model in FLUENT. And the variation law of CO concentration under three ventilation schemes is analyzed. On this basis, the distribution of cross channel jet fan is optimized.
Research conclusions:(1) Under the condition of 3 holes parallel construction, through the intermediate service tunnel, the pollutants produced by drilling and blasting construction of multiple working faces can be effectively discharged. However, there will be pollutant retention in the cross channel area. (2) After the jet fan is added into the service tunnel, there is no obvious CO retention in the whole process. And the concentration peak can be significantly reduced and the discharge concentration rate of CO can be accelerated. (3) The best position of jet fan is 10 m away from the center of cross passage. (4) The research results can provide reference for the design and construction of related subsea tunnel.

Key words： subsea tunnel 3 holes parallel drilling and blasting construction pollutant transport law CFD

Received: 12 January 2022

PACS:

U453.5

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHU Zhengguo
	SUN Aojie
	CHEN Libao
	SUN Wenhao
	HAN Zhiming
	SUN Minglei

Cite this article:

ZHU Zhengguo,SUN Aojie,CHEN Libao, et al. Research on the Ventilation Scheme of 3 Holes Parallel Construction in Subsea Tunnel[J]. Journal of Railway Engineering Society, 2022, 39(9): 64-69.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I9/64

[1]	闫肃.长距离小断面隧道进口独头串联接力通风技术[J].铁道建筑技术,2021(7):130-133.Yan Su. Single End Series Relay Ventilation Technology at the Entrance of Long Distance Small Section Tunnel [J].Railway Construction Technology, 2021(7):130-133.
[2]	周洋,赵宇,张志强,等.隧道通风管道布置参数对瓦斯运移特性的影响[J].科学技术与工程,2021(29):12718-12727.Zhou Yang, Zhao Yu, Zhang Zhiqiang, etc. Influence of Duct Layout Parameters of Tunnel Ventilation on Gas Migration Characteristics[J]. Science Technology and Engineering, 2021(29):12718-12727.
[3]	王文.高原单洞单线特长铁路隧道施工通风流场模拟[D].兰州:兰州交通大学,2018.Wang Wen. Simulation of Ventilation Flow Field in Construction of Single-hole Single-track Super Long Railway Tunnel in Plateau [D].Lanzhou:Lanzhou Jiaotong University,2018.
[4]	王明年,王旭,于丽,等.翔安海底隧道运营环境及污染物分布规律[J].西南交通大学学报,2020(4):695-704.Wang Mingnian, Wang Xu, Yu Li, etc. Operating Environment and Pollutant Distribution in Xiang’an Undersea Tunnel[J].Journal of Southwest Jiaotong University, 2020(4):695-704.
[5]	邓小华,宋神友,曹正卯,等.深中通道海底隧道排烟系统总体方案[J].隧道建设(中英文),2020(8):1176-1185.Deng Xiaohua, Song Shenyou, Cao Zhengmao, etc. Overall Scheme of Smoke Exhaustion System of Submarine Tunnel of Shenzhen-Zhongshan Link[J]. Tunnel Construction, 2020(8):1176-1185.
[6]	车轮飞,肖明清,曾艳华,等.青岛第二海底隧道新型海中送排通风方案探析[J].地下空间与工程学报,2021(1):300-310.Che Lunfei, Xiao Mingqing, Zeng Yanhua, etc. Exploration of a New Ventilation Scheme for the Second Submarine Tunnel in Qingdao[J]. Chinese Journal of Underground Space and Engineering, 2021(1):300-310.
[7]	Wang Xu, Wang Mingnian, Qin Pengcheng, etc. Anexperimental Study on the Influence of Localloss on Ventilation Characteristic of Dividing Flow in Urbantrafficlink Tunnel[J].Building and Environment,2020(5):1-9.
[8]	谭金龙.大型地下工程洞室群施工期通风研究[D].天津:天津大学,2007.Tan Jinlong. Research on Ventilation for Large Scale Underground Cavity Groups Construction[D].Tianjin:Tianjin University, 2007.