A Newly Developed State-of-the-Art Full-Scale Excavation Testing Apparatus for Tunnel Boring Machine (TBM)

AbstractThe accurate performance evaluation of a cutterhead is essential to improving cutterhead structure design and predicting project cost. Through extensive research, this paper evaluates the performance of a tunnel boring machine (TBM) cutterhead for cutting ability and slagging ability. This paper propose cutting efficiency, stability, and continuity of slagging as the evaluation indexes of comprehensive cutterhead performance. On the basis of research of true TBM engineering applications, this paper proposes a calculation method for each index. A slagging efficiency index with a ratio of the maximum difference between the slagging amount and average slagging is established. And a slagging stability index with a ratio of the maximum slagging fluctuation and average slagging is presented. Meanwhile, a cutting efficiency index by the weighed average value of multistage rock fragmentation of a cutter’s specific energy is established. The Robbins and China Railway Construction Corporation (CRCC) cutterheads are evaluated. The results show that under the same thrust and torque, the slagging stability of the CRCC scheme is worse, but the slagging continuity of the CRCC scheme is better. The cutting ability index shows that the CRCC cutterhead is more efficient.

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Predicting penetration rate of hard rock tunnel boring machine using fuzzy logic

Bulletin of Engineering Geology and the Environment ◽

10.1007/s10064-013-0497-0 ◽

2013 ◽

Vol 73 (1) ◽

pp. 23-35 ◽

Cited By ~ 39

Author(s):

Ebrahim Ghasemi ◽

Saffet Yagiz ◽

Mohammad Ataei

Keyword(s):

Fuzzy Logic ◽

Hard Rock ◽

Penetration Rate ◽

Tunnel Boring Machine ◽

Tunnel Boring ◽

Rock Tunnel

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Comparison and correlation between the laboratory, semi-theoretical and empirical methods in predicting the field excavation performance of tunnel boring machine (TBM)

Acta Geotechnica ◽

10.1007/s11440-021-01228-3 ◽

2021 ◽

Author(s):

Yucong Pan ◽

Quansheng Liu ◽

Qi Liu ◽

Yin Bo ◽

Jianping Liu ◽

...

Keyword(s):

Tunnel Boring Machine ◽

Empirical Methods ◽

Tunnel Boring ◽

Excavation Performance

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Research on Dust Migration Law and Dust Reduction Efficiency in the Operation Process of Tunnel Boring Machine

KSCE Journal of Civil Engineering ◽

10.1007/s12205-021-0609-5 ◽

2021 ◽

Author(s):

Ning Liu ◽

Kun Chen ◽

Piao Jiang ◽

Yi-Xiong Huang

Keyword(s):

Tunnel Boring Machine ◽

Tunnel Boring ◽

Operation Process ◽

Reduction Efficiency ◽

Migration Law ◽

Dust Reduction

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Upside Down: Historic Tram Goes Underground – an Infrastructure Challenge on the Way to a Modern City

IABSE Congress, New York, New York 2019: The Evolving Metropolis ◽

10.2749/newyork.2019.0074 ◽

2019 ◽

Author(s):

Oskar-H. Pekoll

Keyword(s):

Tunnel Boring Machine ◽

High Volume ◽

City Center ◽

Tunnel Boring ◽

Traffic Routing ◽

Jet Grouting ◽

Track System ◽

Pass Through ◽

Tunnel System ◽

Historic City

To deal with the high volume of traffic in the historic city center of Karlsruhe (Germany), the track system of the historic surface tram is moved underground.First, seven underground stations are built, which are then connected by using a tunnel boring machine for excavation of the tracks. While the traffic continues on the surface, the new underground stations are being built in sections using the dig-and-cast construction method. Due to the high ground water level bore piles and diaphragm walls of reinforced concrete / concrete cut-off wall are used as excavation pit shoring. A grouted sealing blanket made using jet grouting processes serves as horizontal blanket.The cover is made while the traffic continues overhead, to this end traffic routing of road and tram traffic is altered in several stages of construction. The subsequent removal of the soil is realized via this newly created tunnel system – this way no truck traffic has to pass through the city center.The construction is a challenge to permit a limitation of the deformations in relation to the settlement of the immediately adjacent historic buildings and also in the logistics of the construction while keeping the traffic above ground running.

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