Predicted and observed settlements induced by the mechanized tunnel excavation of metro line C near S. Giovanni station in Rome

Miliziano, S.; Lillis, A. de

doi:10.1016/j.tust.2019.01.022

Cited by 42 publications

(14 citation statements)

References 31 publications

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“…is is because of its high construction efficiency, wide range of applications, and limited impact on the ground surface and associated human activity. However, EPB shield construction will inevitably disturb the surrounding soil causing, to some extent, ground loss and settlement of the ground surface [1][2][3][4][5][6][7][8][9][10][11]. In particular, using the method to construct shallowly buried tunnels in typical urban areas with soft soil poses a serious threat to structures both on the ground surface and underground [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, using the method to construct shallowly buried tunnels in typical urban areas with soft soil poses a serious threat to structures both on the ground surface and underground [12,13]. Many scholars have attempted to estimate ground loss due to EPB shield tunneling using empirical methods [1][2][3], theoretical methods [4][5][6], and numerical simulation [7][8][9][10]. However, the complex engineering situation limits the practical application effect of these methods.…”

Section: Introductionmentioning

confidence: 99%

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Visualization of Multivariate Time‐Series Characteristics of Ground Loss Caused by Shield Tunneling

Rong

Gao

Wang

et al. 2021

Shock and Vibration

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Ground loss due to earth pressure balance shield tunneling eventually leads to a surface settlement which can be an issue of great concern. However, the existing machine learning methods ignore the continuous and dynamic nature of EPB shield tunneling. In this work, a multivariate time-series (MTS) model for ground loss is proposed based on an analysis of factors and processes related to ground loss combined with the characteristics of original time-series data involving multiple parameters recorded by EPB shield machines in real time. A method of visualizing MTS features based on a residual network and multichannel fully convolutional neural network is also presented. The validity of the proposed ground-loss model is verified via calculation and comparison with 13 EPB shield construction projects carried out in typical urban areas featuring soft soil. Thermal maps are thus obtained to visualize the classification contributions, which provide a visual basis for feature analysis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Visualization of Multivariate Time‐Series Characteristics of Ground Loss Caused by Shield Tunneling

Rong

Gao

Wang

et al. 2021

Shock and Vibration

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“…1, an EPB shield machine uses continuous and flowing modified excavation material as its supporting medium. By controlling the thrust, speed, and speed of screwconveyor, the dynamic equilibrium relationship of the controlled volume of a modified excavation material in the process of flow through the cutter plate, chamber, and screw-conveyor is established, benefiting the stability of the working face and tunneling work combined with the operation of grouting at the tail of the shield (Anagnostou and Kovári, 1996); however, the construction of an EPB shield machine will inevitably disturb the surrounding soil (Chen et al, 2018;Liang et al, 2018), causing surface movement (Sirivachiraporn and Phienwej, 2012;Cattoni et al, 2016), and volume loss (Sagaseta, 1987;Lee et al, 1992;Liu et al, 2020), leading to surface settlement (Dindarloo and Siami-Irdemoosa, 2015;Fang et al, 2017;Miliziano and De Lillis, 2019;Moeinossadat and Ahangari, 2019;Zhang et al, 2020a). Shield construction of shallow tunnels in soft soil of urban areas poses a serious threat to above-ground and underground structures (Liao et al, 2011;Zhang and Huang, 2014;Meng et al, 2018;Wang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Amount of Soil Discharged by an Earth Pressure Balanced Shield Machine Based on Feature Engineering

Wang

Rong

et al. 2021

KSCE J Civ Eng

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“…Huynh studied an innovated mechanized tunneling technology to construct a twin spiral tunnel at once by multicircular face shield, and also the cross section can be changed from a horizontal double circular shape to a vertical one [8]. Numerical simulations have been explored to study the stratum disturbance caused by the construction of a tunnel at curved alignment [9][10][11][12]. Mitsutaka et al employed the proposed three-dimensional FEM kinematic model to compute immediate ground movements by a curved shield tunnel excavation in multilayered ground [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Double‐Line Spiral Tunnel Curvature on the Tunnel Construction Stability

Zhang

Wang

Niu

et al. 2020

Advances in Civil Engineering

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In the construction of mountain highway, in order to avoid complicated geology and adapt to the requirements of the terrain of the large height difference and the large slope, the double-line spiral tunnels are gradually applied. The purpose of this paper is to analyze the mechanical behavior of the double-line spiral tunnel and its surrounding rock under different line curvatures, and to obtain the influence of the curvature of the spiral tunnel on the stability of the double-line tunnel construction. The analysis of this paper is based on the engineering background of double-line spiral tunnels in China’s Yunnan province. The elastoplastic three-dimensional rock strata-tunnel by means of finite difference FLAC3D software was established to simulate the construction process. The model was verified by comparing the calculation results and the actual monitoring data of tunnel vault settlement. The small curvature radius spiral makes the mechanical behavior of the double-line tunnel uneven and the surrounding rock deformed unevenly. A quantitative analysis and qualitative evaluation of the influence of curvature radius were established by the systematic evaluation index of (1) ratio of compressive stress on both sides of the tunnel, (2) stress ratio of double-line tunnel, (3) convergent deformation of the cross section of the tunnel, and (4) deformation of the surrounding rock on the top of the tunnel. The results show that the small curvature radius (less than 200 m) will make the inner pressure of the inner tunnel significantly greater than the external pressure stress, showing obvious asymmetry, and the inner tunnel vault tensile stress is greater than the outer tunnel. With the increase of the curvature radius (about more than 400 m), the ratio of the compressive stress on the inside and outside of the tunnel tends to be constant, and the bias condition is weakened and stabilized. Meanwhile, the smaller curvature radius makes the convergent deformation of the cross section of the tunnel appear asymmetrical, and the compression quantity inside the tunnel center line is larger. It provides a reference basis for the stability control of the construction of the double-line spiral tunnels in the mountainous area.

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Predicted and observed settlements induced by the mechanized tunnel excavation of metro line C near S. Giovanni station in Rome

Cited by 42 publications

References 31 publications

Visualization of Multivariate Time‐Series Characteristics of Ground Loss Caused by Shield Tunneling

Visualization of Multivariate Time‐Series Characteristics of Ground Loss Caused by Shield Tunneling

Prediction of the Amount of Soil Discharged by an Earth Pressure Balanced Shield Machine Based on Feature Engineering

Effect of the Double‐Line Spiral Tunnel Curvature on the Tunnel Construction Stability

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