Study on Influence of Construction Process of Double-Line Shield Tunnels on Frame Structure

Yang, Hui; Shi, Hongtao; Jiang, Xueliang; Liu, Chan; Yu, Lei

doi:10.1007/s10706-020-01569-y

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…Although the settlement control of existing stations is key to underpass construction [5][6][7][8][9][10][11][12], engineering safety problems are likely to occur during its construction [13,14]. Excessive settlement will lead to the local collapse of existing stations [15,16], thereby affecting regular operation and use, while surface ancillary structures will cause settlement collapse damage. In short-distance underpass construction, excavation soil disturbance has an evident influence on the settlement of the existing station.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Zhang

et al. 2023

Buildings

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Settlement control of existing stations has consistently been a key issue in tunnel construction. Intermediate soil has a significant influence on the settlement of the existing station as a connector between the new tunnel and the existing station which should be considered when selecting settlement control measures. To clarify the relationship between the state of the intermediate soil and the settlement and control measures of the existing station, this study investigated 49 new tunnel projects under existing stations and elucidated the relationship between the settlement and the settlement control measures of the existing station and the intermediate soil. The relationship between the failure of the intermediate soil and the settlement of the existing station was further analyzed by numerical simulation. Lastly, a simple mechanical model of intermediate soil failure was constructed to determine the stress state of the intermediate soil in constructing a tunnel under the existing station to guide the formulation of settlement control measures for the existing station. Hence, when the intermediate soil is completely destroyed, active control measures, such as jack or grouting lifting, should be implemented; when the intermediate soil is partially damaged, passive control measures should be undertaken. Thus, this study can provide a reference for settlement control of tunnels under existing stations.

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Section: Introductionmentioning

confidence: 99%

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Zhang

et al. 2023

Buildings

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“…Referring to the construction experience of other cities, a large number of urban overpasses have brought various disadvantages, resulting in increasingly severe environmental problems such as noise and dust [1,2]. The development of underground space resources and the development of the subway transportation industry have become the necessary means for the development of a metropolis [3,4]. Due to its advantages in waterproofing, soil adaptability, disturbance range to surrounding soil, and degree of mechanization, tunnel shield construction has significant advantages over the hidden excavation method in controlling ground settlement and deformation [5,6].…”

Section: Introductionmentioning

confidence: 99%

Additional Stress of Soil and Surface Settlement during Tunnel Shield Construction

Bian

Peng

et al. 2023

Buildings

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To study the influence of shield excavation on the surrounding soil, and to control the influence of the shield excavation of the subway tunnel on the surface settlement and the deformation of the surrounding buildings, it is necessary to study the additional stress of the surrounding soil caused by the tunnel shield excavation and the law of surface settlement. Combined with a shield construction project of a subway tunnel, this article uses the Mindlin solution in elastic mechanics to obtain three-dimensional calculation formulas for the additional thrust on the shield cutter head surface and the additional stress and displacement field caused by the friction force between the shield shell and the soil contact interface on the surrounding soil. The Loganathan ground movement pattern is used to determine the soil movement mode. The source–sink method is used to study the formula for calculating the three-dimensional additional stress of the soil around the shield tunnel caused by ground loss. The results show that when the shield is digging, the ground goes through five stages, namely the uplift of the ground before the arrival of the shield cutter head, surface settlement when the shield reaches the surface subsides when the shield tail of the shield passes through, the passage of the shield tail of the shield, surface settlement when the lining is separated from the shield, and consolidation and settlement after the shield passes through.

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“…Pirastehfar used 3D nite element method to study the mechanism of interaction between the shield tunnels driven at a close range; Shiraz metro line 2 was taken as a speci c case study. It was concluded that the interaction between the tunnels driven by a close shield is controlled by geotechnical parameters such as soil stiffness, cohesion, and friction angle, and geometrically related parameters such as the distance between the tunnels (Pirastehfar et al 2020;Yang et al 2020). Most of the current research work focus on the deformation and surface settlement during the tunnel excavation process; only a few studies are found in the international engineering geology and rock engineering literature on the use of 3D numerical simulation software to simulate the entire construction process and analyze the impact of TBM on the construction environment from the perspective of ground vibration.…”

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confidence: 99%

Mechanical aspects of construction of new TBM tunnel under existing structures

Zhang

et al. 2021

Preprint

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It is inevitable for the construction of subways to pass under the existing structures in the city; this will cause settlement of the existing structures and affect their safety. The soil is a complex mixture, and hence it is difficult to determine the damage caused by construction using tunnel boring machine (TBM) method to the stress balance of the surrounding soil. Normally, settlement and uplift of the surface are caused during tunneling. Therefore, large-scale 3D simulations are needed to study the interaction between mechanically driven tunnel construction and the surrounding soil to estimate the expected settlement and related damage risks to the existing structures, especially in tunnel construction in urban areas. Qingdao Metro Line 1 in the Haixiao section (Xiaocunzhuang and Haiboqiao stations) was taken up as the research object to study the trend and degree of the effect of TBM tunnel construction using the numerical simulation software Midas GTS NX. The numerical simulation results and measured data were used for the reliability analysis to study the influence of different digging speeds and pressures in TBM construction on ground subsidence, and the effect of vibrations generated at the tunnel face by the TBM cutter head on the ground structure. It is shown that when other factors remain unchanged, the faster the driving speed, the smaller the ground settlement; the higher the surrounding rock pressure, the smaller the ground settlement. The vibration of the ground structure caused by the TBM cutter head complies with the relevant specifications. During construction, the driving parameters should be selected suitably depending on the available budget.

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Study on Influence of Construction Process of Double-Line Shield Tunnels on Frame Structure

Cited by 5 publications

References 13 publications

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Additional Stress of Soil and Surface Settlement during Tunnel Shield Construction

Mechanical aspects of construction of new TBM tunnel under existing structures

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