浅埋隧道单侧扩建优化施工方案探讨

Abstract
Figure/Table
References (0)
Related Citation (15)

Abstract At present, the construction schemes of tunnel enlarging are analogized by creating a new tunnel through a traditional method. However, the traditional excavation method ignores the advantage of long-term support and stability of the original tunnel lining to the surrounding rock, and the construction efficiency is also reduced. The optimized construction plan was theoretically analyzed using the case of the Chongqing Yuzhou tunnel enlarging. The optimization construction schemes of single-sided shallow tunnel enlarging were extracted in accordance with the foundation of the study on the construction mechanics of a shallow tunnel, that is, the way of the rational arch axis enlarging in the crosswise direction and the jump-driving method in the lengthwise direction. The construction analysis was compared with the field monitoring measurement results and ANSYS simulation of the 3D finite element calculation of the entire tunnel enlarging process. By optimizing the construction scheme, the calculation value of the compressive stress of the original tunnel lining was increased by excavation face advancing. The original tunnel lining that had not been dismantled can play the role of the column and bear the surrounding rock pressure caused by the jet-hopping excavation. This lining could effectively improve the safety and stability for tunnel enlarging. The adopted rational arch axis excavation in the transverse direction could reasonably and significantly transfer the surrounding rock pressure. This process could reduce the tensile stress and increase the compressive stress of the initial support structure. Results of the numerical calculation and field monitoring data showed that the excavation scheme of the shallow tunnel is optimized after unilateral expansion. The optimization construction schemes can change the original rock stress path and play a role in the surrounding rock stability. The displacement of the tunnel vault can be reduced by 16%-20%, and the tunnel vault does not appear in the tension zone. The optimization of construction scheme can reduce the arch subsidence and tensile stress of the lining, ensure the safety of construction, and shorten the construction period. These obtained beneficial conclusions can be supplied to the next similar tunnel enlarging projects.

Key words： tunnel engineering construction schemes intermittent trough shallow tunnel single-sided enlarging

Received: 11 December 2018

Fund:Supported by the China Postdoctoral Science Foundation(No.2018M643854); the Jiangsu Planned Projects for Postdoctoral Research Funds in China(No.2018K047A)

Corresponding Authors: TAN Yi-zhong E-mail: tanyizhong@163.com

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	TAN Yi-zhong
	LIU Yuan-xue
	CAI Shou-jun
	WANG Pei-yong
	CHEN Yu-long

Cite this article:

TAN Yi-zhong,LIU Yuan-xue,CAI Shou-jun, et al. Optimization Construction Scheme of Single-sided Shallow Tunnel Enlarging[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 45-55.

URL:

http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/ OR http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/Y2019/V13/I2/45

[1] QIAN Qi-hu. Greeting Development Climax of Urban Underground Space in China[J]. Chinese Journal of Geotechnical Engineering, 1998,20(1):112-113. (in Chinese)
[2] LIU Dong, GAO Wen-xue, SUN Bao-ping, et al. Numerical Simulation of Blasting Vibration on Existing Tunnel Extension[J]. Rock and Soil Mechanics, 2016,37(10):3011-3017. (in Chinese)
[3] LI Yuan-fu. Construction Technology of Tunnel Extension for Guancunba Tunnel[J]. Railway Construction Technology, 1996(4):22-26. (in Chinese)
[4] PENG Nian. Study on Surrounding Rock Mechanical Response Mechanism of In-situ Expanded Tunnel[D]. Chongqing:Chongqing University, 2010. (in Chinese)
[5] GAO Gan, LIU Yuan-xue, XU Guang-wei, et al. Study on the Blasting Vibration in Tunnel Extension[J].Chinese Journal of Underground Space and Engineering,2010,6(6):1285-1294. (in Chinese)
[6] GAO Gan, LIU Yuan-xue, ZHOU Jie-zhong, et al. Study on Underground Space Enlargement Options[J]. Modern Tunnelling Technology, 2010,6(6):1-9. (in Chinese)
[7] LUNARDI P. Widening the Load at Nazzano[J]. Tunnels & Tunneling International, 2003(7):16-19.
[8] OZSANA A, KARPUZB C. Preliminary Support Design for Ankara Subway Extension Tunnel[J]. Engineering Geology, 2001,59:161-172.
[9] ZHENG Yin-ren, ZHAO Shang-yi, LI An-hong, et al. FEM Limit Analysis and Its Application in Slope Engineering[M]. Beijing:China Communications Press,2011. (in Chinese)
[10] AN Yong-lin, HUANG Kan, PENG Li-min, et al. Analysis of Tunnel Stability Based on Strength Reduction Method[J]. Journal of Highway and Transportation Research and Development,2001,28(4):91-96. (in Chinese)
[11] LI Yu-chuan. Study on Mechanical Behavior of Extension of Existing Tunnel Project[D]. Chendu:Southwest Jiaotong University,2008. (in Chinese)
[12] BHASIN R, GRIMSTAD E. The Use of Stress-strength Relationships in the Assessment of Tunnel Stability[J]. Tunnelling and Underground Space Technology,1996,11(1):93-98.
[13] WU Zu-song. Research on Calculation Method and Monitoring of Surrounding Rock Pressure for Highway Tunnel[D]. Chongqing:Chongqing Jiaotong University,2008. (in Chinese)
[14] WANG Yong-fu. Application of Strength Reduction Finite Element Method in Tunnel Stability Analysis[D]. Chongqing:Chongqing Jiaotong University,2010. (in Chinese)
[15] WANG Xian-chun, ZHUANG Ji-dong, ZHANG Hong-bo. Analysis on Impact of Construction of Shallow-buried Soft Ground Tunnels on Deformations of Ground Surface and Surrounding Rock Mass[J]. Tunnel Construction, 2006,26(1):21-24. (in Chinese)
[16] TAN Yi-zhong, LIU Yuan-xue, ZHOU Jie-zhong. Research on Proper Excavation Steps in Tunnel Extension[J]. Journal of Logistical Engineering University, 2011,27(5):8-12. (in Chinese)
[17] TAN Yi-zhong, LIU Yuan-xue, ZHOU Jia-wu. The Proper Driving Footage in the Jump-driving Method for Single-sided Tunnel Extension[J]. Chinese Journal of Underground Space and Engineering, 2013(1):147-154. (in Chinese)
[18] YANG Ming-hui, WANG Luo-cheng, ZHAO Ming-hua. Calculation of Soil Pressure against Double-row Anti-slide Piles Considering Soil Arching Effect[J]. Journal of Highway and Transportation Research and Development, 2011,28(10):12-18. (in Chinese)