Modelling the construction and long-term response of Göta Tunnel

Tornborg, Johannes; Karlsson, Mats; Kullingsjö, Anders; Karstunen, Minna

doi:10.1016/j.compgeo.2021.104027

Cited by 15 publications

(4 citation statements)

References 42 publications

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“…The Mohr-Coulomb model (hereinafter referred to as the MC model), most often used in engineering calculations [9][10][11], uses one type of elastic modulus -the secant elastic modulus E 50 , determined when the soil sample reaches half of the destructive deformations during laboratory test.…”

Section: Pressure On the Lining [Kpa]mentioning

confidence: 99%

Additional Pressure Distribution on Subway Tunnels from Ground Construction

Sokornov

Konkov

Novikov

et al. 2022

Civil and Environmental Engineering

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In the proposed research there were evaluated the factors influencing the distribution of additional pressure from ground construction on the linings of the subway tunnels. In recent years, the Department of Tunnels and Subways of the Emperor Alexander I St. Petersburg State Transport University has provided scientific support for many capital construction projects with geotechnical calculations of the buildings under construction impact on subway structures, both using analytical methods and mathematical modeling. The existing analytical methods allow us to evaluate the change in the additional pressure in the ground massive without taking into account the tunnel construction, while in reality the tunnel construction significantly changes the stress-strain state of the ground massive in the vicinity of the excavation. This factor was considered as the most significant, and together with it, there were evaluated the influence of the tunneling method and the influence of the applied geomechanical soil model on the calculation results.

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Section: Pressure On the Lining [Kpa]mentioning

confidence: 99%

Additional Pressure Distribution on Subway Tunnels from Ground Construction

Sokornov

Konkov

Novikov

et al. 2022

Civil and Environmental Engineering

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“…When a deep excavation is carried out in a confined water-rich stratum, dewatering in the confined aquifer is necessary to ensure a dry construction environment and meet safety needs. Obviously, dewatering in deep excavation projects will induce groundwater level drops, which is likely to cause excessive ground settlement [1][2][3]. To minimize and eliminate groundwater drawdown and ground settlement caused by pumping, groundwater recharge can be adopted [4][5][6], which injects the water into the aquifer through the recharge well.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Recharge Schemes for Deep Excavation in the Confined Water-Rich Stratum

Zhang

Meng

et al. 2023

Sustainability

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With the excavation of a metro station in a confined water-rich stratum as our background, the sensitivity of four typical recharge parameters is analyzed by using numerical simulation. Based on the orthogonal analysis method, an optimal recharge scheme was obtained. The results show that the main influential factors of ground settlement and groundwater recovery are recharge pressure and recharge depth. The main influential factor of retaining structure deformation and influence radius of recharge is the distance between the recharge wells and the foundation pit. For the groundwater recharging of a deep excavation in the water-rich confined area of Jinan, China, the optimal effect can be achieved when setting recharge wells with a depth of 50 m arranged in a line with a spacing of 10 m at a horizontal distance of 20 m away from the retaining wall and recharge pressure is 40 kPa. With the same construction difficulty, the maximum settlement in optimized scheme decreased 71.19%, the flux of groundwater recovery increased 11.96%, the maximum horizontal displacement of the wall decreased 15.61%, and the influence radius of recharge enlarged 8.62% compared to original scheme.

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“…Li et al [16] used ADINA software to simulate the effects of tunnel construction on the settlements of the ground surface and pile foundations in the composite strata. Johannes et al [17] presented a benchmark of a rate-dependent constitutive model for soft soils, implemented in a 2D finite element code, compared to the response of an instrumented excavation in sensitive clay. The results of modeling agree with the ongoing settlement rate assessed by remote sensing data.…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing Ground Settlement during Tunnel Proximity Construction

Yuan,

Wang,

Kang

et al. 2023

Sustainability

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Adjacent tunnel excavation has an adverse impact on existing structures. Based on the engineering project of the Donghuashan Tunnel under-crossing an existing tunnel, this paper designed 25 sets of orthogonal numerical simulation tests to investigate the influential mechanisms of five parameters on ground displacement and deformation. The influential factors are skew angle (α), proximity distance (l), buried depth (h), clearance (D), and ratio of tunnel clearances (ν). The orthogonal test results revealed that (1) the new tunnel clearance is the main impact factor of both ground settlement and curvature deformation, (2) ground horizontal movement is most significantly influenced by the skew angle between the existing tunnel and the new tunnel, and (3) the new tunnel buried depth is the key influential parameter for ground tilt deformation as well as horizontal deformation. The conclusions of this research suggest that during the period of railway planning, it is very important to plan the buried depths and spans of new tunnels rationally to minimize disturbance to existing tunnels.

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Modelling the construction and long-term response of Göta Tunnel

Cited by 15 publications

References 42 publications

Additional Pressure Distribution on Subway Tunnels from Ground Construction

Additional Pressure Distribution on Subway Tunnels from Ground Construction

Optimization of Recharge Schemes for Deep Excavation in the Confined Water-Rich Stratum

Factors Influencing Ground Settlement during Tunnel Proximity Construction

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