Actual performance analysis of a double shield TBM through sedimentary and low to medium grade metamorphic rocks of Ghomrood water conveyance tunnel project (lots 3 and 4)

Hassanpour, Jafar; Firouzei, Yavar; Hajipour, Golnaz

doi:10.1007/s10064-020-01947-z

Cited by 16 publications

(3 citation statements)

References 10 publications

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“…Gertsh [6] and Cho et al [7] analyzed the relationship between rock-related parameters and thrust per cutter using a linear cutting test. Yagiz [8] and Hassnapour et al [9] developed empirical models to predict parameters related to thrust. Recently, some works using machine learning (ML) techniques have been reported to effectively analyze complex field data.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Prediction of Operating Parameter of TBM during Tunneling

Lee

Song

et al. 2021

Applied Sciences

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With the increasing use of the tunnel boring machine (TBM), attempts have been made to predict TBM operating parameters. Prediction of operating parameters is still an important step in the adaptability of the TBM for the future. In this study, we employ a walk forward (WF) prediction method based on ARIMAX, which can consider time-varying features and geological conditions. This method is applied to two different TBM projects to evaluate its performance, and is then compared with WF based on ordinary least squares (OLS). The simulation results show that the ARIMAX predictor outperforms the OLS predictor in both projects. For practical applications, an additional analysis is carried out according to the real-time prediction distance. The results show that time series-based ARIMAX provides meaningful results in 8 rings (11 m) or less of real-time prediction distance. The WF based on ARIMAX can provide reasonable TBM operating conditions with time-varying data and can be utilized in decision-making to improve excavation performance.

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Section: Introductionmentioning

confidence: 99%

Real-Time Prediction of Operating Parameter of TBM during Tunneling

Lee

Song

et al. 2021

Applied Sciences

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“…

On the other hand, most of the TBM (tunnel boring machine) performance prediction models have been developed for strong-to-very strong, primarily brittle rocks [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] and only a few models [18,19] can be used for prediction of penetration rate of machine in intact soft sedimentary rocks. The accuracy of these models depends on the cases used in the databases that were analysed for the development of the pertinent models and the range of rock strength and rock mass properties in these projects.To overcome this shortcoming, in this study, a special database which includes tunnel sections located in soft sedimentary rocks was developed and used for developing new empirical prediction models for this special rocks.

…”

mentioning

confidence: 99%

Soft sedimentary rocks and their boreability characteristics in mechanised tunnelling projects

Hassanpour

Goodarzi

Yağız

et al. 2023

Geomechanics and Tunnelling

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Soft sedimentary rocks are frequently found in many mountainous regions of the world like Zagros Mountains located in the south and west of Iran, where most of Iran's water conveyance projects have been constructed or are under construction. These rocks usually contain considerable amounts of different types of clay minerals. The clay mineral‐rich rocks cause many problems in the deep and long mechanised tunnelling projects. In particular, the boreability of these rocks is very different from other rocks, and due to their plastic behaviour and the lack of complete formation of chips during the cutting process by disc cutters, the prediction of cutterhead penetration in these rocks, with existing models, is often inaccurate. In this paper, a new model for estimating the disc cutter penetration in these rocks is introduced, which is based on data obtained from the main tunnelling projects completed in sedimentary rocks of Zagros Mountains. Then, the validity of the developed model is checked using actual data obtained from a tunnel recently constructed in the area. The new model can offer a more accurate estimate of machine performance in similar rocks.

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“…Although many practical technical problems have been solved in a large number of cases in recent years, there are still a large number of outstanding technical and theoretical problems to be solved. Some researchers have carried out the research on the main geological problems faced by the water conveyance tunnel and the tunnel size setting, and summarized the situations such as rock burst, deformation of surrounding rock, water inrush, fault zone, toxic gas and high ground temperature that are often encountered in tunnel construction [4][5][6] . At the same time, the tunnel's diameter, length, and depth must also be thoughtfully planned while taking into account the route's complicated and shifting geological circumstances 7 .…”

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confidence: 99%

Construction practice of water conveyance tunnel among complex geotechnical conditions: a case study

Duan,

Zhang,

Sun

2023

Sci Rep

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The construction practice of water conveyance tunnels often encounters various complex geotechnical engineering conditions, which bring huge challenges to the design and construction of water conveyance tunnels. Based on the theory of rock elastic–plastic mechanics and finite element analysis technology, this article carried out investigations of engineering geological features, geological formations and hydrological conditions establishes a calculation model for the 3# water conveyance tunnel of the Fenhe River Diversion Project, and analyzes the variation law of surrounding rock stress and displacement during TBM excavation of the tunnel. The results indicate that the dominant direction of the rock mass principal stress measured by the hydraulic fracturing method is NE84°, and the maximum horizontal principal stress, minimum horizontal principal stress, and vertical stress decrease sequentially, analyzing the characteristics of shield TBM construction technology, it is applied to the construction of water transfer tunnels. The numerical simulation of TBM construction using FLAC3D software shows that as the excavation surface advances, the subsidence value of the tunnel roof first slowly increases, then rapidly increases, and then tends to stabilize. The horizontal displacement of the surrounding rock is increasing. The maximum principal stress of the surrounding rock gradually increases. The final surrounding rock stress is 35 MPa. The TBM shield machine with mud water balance driven by indirectly controlled frequency conversion motor is selected for TBM construction of the tunnel. The study offers statistical information to support tunneling technology for water conveyance in the geotechnical engineering practice.

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Actual performance analysis of a double shield TBM through sedimentary and low to medium grade metamorphic rocks of Ghomrood water conveyance tunnel project (lots 3 and 4)

Cited by 16 publications

References 10 publications

Real-Time Prediction of Operating Parameter of TBM during Tunneling

Real-Time Prediction of Operating Parameter of TBM during Tunneling

Soft sedimentary rocks and their boreability characteristics in mechanised tunnelling projects

Construction practice of water conveyance tunnel among complex geotechnical conditions: a case study

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