Effect of Blast-Induced Vibration from New Railway Tunnel on Existing Adjacent Railway Tunnel in Xinjiang, China

Liang, Qingzhong; Li, Jie; De-wu, LI; Ou, Erfeng

doi:10.1007/s00603-012-0259-5

Cited by 56 publications

(37 citation statements)

References 11 publications

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“…rough experimental and numerical studies, this method can effectively reduce the ground vibration caused by blasting. Liang et al [18] studied the influence of blasting vibration of Xinjiang new railway tunnel on the existing tunnels. Based on the results of on-site monitoring and numerical simulation, the original blasting design and corresponding parameters were adjusted to reduce the surface vibration caused by blasting.…”

Section: Introductionmentioning

confidence: 99%

Optimization Analysis of Controlled Blasting for Passing through Houses at Close Range in Super‐Large Section Tunnels

Song

Mao

Tian

et al. 2019

Shock and Vibration

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According to the on-site vibration velocity monitoring and peak vibration velocity prediction, it is found that the maximum vibration velocity generated by the existing Dizong blasting scheme does not meet the requirements of the maximum allowable vibration velocity of houses. Therefore, the existing blasting scheme is optimized by reducing the maximum single-segment charge and a variety of damping measures such as multistage duplex wedge groove, adding damping hole, and millisecond blasting. In addition, the blasting data before and after optimization are analyzed and compared by wavelet (packet) technology. The results show that the optimized blasting main frequency domain is increased to 50∼150 Hz and the maximum vibration intensity value is reduced by 79.8%. Based on the time-energy analysis, the maximum energy value is reduced by 67.75% compared with the original scheme, and the dominant energy of the original scheme is reduced by 97.81%, 71.49%, 82.44%, 95.93%, and 93.03%, respectively, after optimization. The maximum vibration velocity generated by the optimized blasting scheme construction is 1.12 cm/s, which is less than the maximum allowable vibration velocity of the building of 1.2 cm/s, which meets the maximum allowable vibration velocity requirements of the building. The optimized blasting scheme realizes the safe and rapid construction of the two steps of the Dizong tunnel, which can provide a reference for similar engineering construction in the future.

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Section: Introductionmentioning

confidence: 99%

Optimization Analysis of Controlled Blasting for Passing through Houses at Close Range in Super‐Large Section Tunnels

Song

Mao

Tian

et al. 2019

Shock and Vibration

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show abstract

“…It was found that the PPV of the unloaded microvibration can be as high as the PPV of the explosion-induced wave. Liang et al [10] conducted a comprehensive study on the impact of new tunnel blasting vibration on existing railway tunnels in Xinjiang and proved that adjusting the original blasting design and corresponding parameters can effectively reduce the maximum blasting vibration velocity (BVV). In order to study the effects of tunnel blast construction on the surrounding rock and the lining systems of adjacent existing tunnels, Li et al [11] monitored the vibration of the existing tunnel real time, and the monitoring results showed that the main frequency distributions of the radial, tangential, and vertical vibration of the subway tunnel were significantly different.…”

Section: Introductionmentioning

confidence: 99%

Influence of Small, Clear Distance Cross‐Tunnel Blasting Excavation on Existing Tunnel below

Duan

Gong

et al. 2019

Advances in Civil Engineering

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The vibration effect generated during tunnel excavation can influence or damage adjacent tunnels. Studying and controlling the blasting vibration effect has important theoretical and practical significance, especially for new tunnels. This paper takes the tunnel project of Gao Jiu Lu-Jia Hua Cross Tunnel in Chongqing as the research background and assesses the blasting vibration influence in the up-down cross-tunnel. Onsite monitoring and numerical simulation were used to analyze peak particle velocity (PPV) changes, stress distribution, and crown settlement during the excavation process of Gao Jiu Lu I Tunnel at Jia Hua Tunnel Left Line in the cross-section. Influence laws of blasting excavation in a small, clear distance cross-tunnel on an existing tunnel below were obtained. Results show that new tunnel blasting vibrations exerted the largest influence on the crown of the existing tunnel below in the cross-section. The maximum tensile stress of the secondary lining of the existing tunnel below was mainly concentrated in the crown area. The maximum compressive stress during excavation was concentrated in the crown foot, and the stress value was less than the tensile and compressive strength of the concrete. The loosening of the surrounding rock from blasting excavation of the new tunnel caused secondary settlement of the existing tunnel crown below. The cumulative settlement value at the cross-section of the two tunnels was the largest. With an increase in axial distance from the cross-section of the existing tunnel crown, the settlement value gradually declined and became stable. These research results have reference value for the construction of a small, clear distance cross-tunnel and provide theoretical guidance for similar tunnel excavation projects in the future.

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“…Rock masses with harder rock and fewer discontinuities seem to contribute to stronger tunnel vibrations than softer rock and more discontinuities. This fact induces greater risks for tunnels in 'high-quality' rock masses [18]. However, a few researches were carried out to study the relationship of the observed PPV on the lining areas along the existing tunnel direction, due to either the lack of in situ test data or the difficulty in conducting field tests, particularly for tunnels that are usually old and vulnerable after several decades of service.…”

Section: Introductionmentioning

confidence: 99%

“…The comparison of time results obtained with these two methods is usually used in the case of a sole explosion such as in metro due to terrorist acts [12], [13]. A comparison of magnitude values can be used in the case of blasting shots with time delay such as explosions at a tunnel face during tunnel excavation by blasting method [16], [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Impact of Blasting at Tunnel Face on an Existing Adjacent Tunnel

Dang¹

2018

GEOMATE

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Experimental and numerical research of the effect of blasting vibrations during tunneling on surrounding structures (rock mass, existing tunnels, buildings, etc.) was widely studied in recent years. However, the effect of blasting vibration from a new tunnel on an existing adjacent tunnel is still unclear. A few researches were carried out to study the relationship of the observed Peak Particle Velocity (PPV) on the lining areas along the existing tunnel direction, due to either the lack of in situ test data or the difficulty in conducting field tests, particularly for tunnels that are usually old and vulnerable after several decades of service. This paper introduced two dimensional and three dimensional numerical with field data investigations on the effect of tunnel face blasting on the surrounding rock mass and on an existing adjacent tunnel along the existing tunnel direction. The Croix-Rousse tunnel project in Lyon (France) was adopted as a case study. The derived results allow predicting the tunnel lining damage areas under the impact of blast loads.

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Effect of Blast-Induced Vibration from New Railway Tunnel on Existing Adjacent Railway Tunnel in Xinjiang, China

Cited by 56 publications

References 11 publications

Optimization Analysis of Controlled Blasting for Passing through Houses at Close Range in Super‐Large Section Tunnels

Optimization Analysis of Controlled Blasting for Passing through Houses at Close Range in Super‐Large Section Tunnels

Influence of Small, Clear Distance Cross‐Tunnel Blasting Excavation on Existing Tunnel below

Impact of Blasting at Tunnel Face on an Existing Adjacent Tunnel

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