Calculating Jacking Forces for Circular Pipes with Welding Flange Slabs from a Combined Theory and Case Study

Jia, Pengjiao; Jiang, Biwang; Zhao, Wen; Guan, Yongping; Han, Jiqing; Cheng, Cheng

doi:10.1007/s12205-019-0977-2

Cited by 13 publications

(4 citation statements)

References 14 publications

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“…With the continuous development and utilization of urban underground space, such as tunnel, underground station, and underground commercial space [1][2][3], the construction of many underground facilities has gradually failed to meet the requirements of open-cut construction [4][5][6][7]. Pipe jacking is one of the typical trenchless underground construction methods [8,9], which has the advantages of high utilization rate of section area, shallow burial depth, no interruption of surface traffic, high efficiency, and low pollution.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Predicting Ground Settlement Induced by Pipe Jacking Construction

Niu

Cheng

Zhang

et al. 2020

Mathematical Problems in Engineering

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Pipe jacking technology has the advantages of fast construction speed, high economic benefit, and small impact on the urban environment, and mechanical vibration and mechanical soil interaction will lead to the settlement of upper part of pipe jacking and surrounding soil. So, the solution of soil settlement problem is of great significance for underground engineering construction. The soil loss, additional stress, and friction during the construction of rectangular pipe jacking are the main factors that cause the surface settlement. Aiming at the problem of surface settlement caused by pipe jacking in no. 6 subway in Kunming, the formation deformation caused by additional stress and friction force on excavation surface during pipe jacking process was analyzed by Mindlin’s displacement solution, and the formation deformation caused by soil loss was analyzed by random medium theory. Considering the independence of the three influencing factors, the superposition of the three types of stratum deformation was the superposition model of surface settlement, and the model was compared with the empirical method and the measured settlement data to verify its practicability and reliability. The results showed that the surface vertical settlement curve was roughly in the shape of “S,” which can be divided into uplift occurrence area, sensitive settlement area, stable settlement area, and rebound settlement area. Friction force and additional stress caused the uplift of stratum in the front of construction area, and soil loss caused the subsidence of stratum in the rear of construction area. Rectangular pipe jacking in weak stratum caused the soil to move towards the excavation surface, easily causing micro-overexcavation.

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Section: Introductionmentioning

confidence: 99%

A New Method for Predicting Ground Settlement Induced by Pipe Jacking Construction

Niu

Cheng

Zhang

et al. 2020

Mathematical Problems in Engineering

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“…The construction safety in this step is directly related to the entire project's success. Studies about the PPM mainly focus on pipe jacking (Xiao et al, 2016;Liu et al, 2018;Shi et al, 2018;Zhang et al, 2018;Jia et al, 2019), environmental effects (Ba et al, 2018;Yang et al, 2018;Jia et al, 2020) and mechanical behavior of the pipe roof (Xiao et al, 2016). Studies on steel pipe cutting and support in the PPM are rare.…”

Section: Instructionmentioning

confidence: 99%

Research of Pipe Cutting and Support in the Pipe-Roof Pre-Construction Method

Yang

Liu

et al. 2022

Front. Earth Sci.

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The studies on the steel pipe cutting and support stage in the pipe-roof pre-construction method (PPM) are rare, and their design lacks relevant standards, which is relatively conservative. Based on the Xinleyizhi Station of the Shenyang Metro construction case, MIDAS/GTS is used to study the stress of the original jacking steel pipes, supporting column, and surface subsidence under the influence of different construction parameters in the steel pipe cutting and support process in the PPM. The measured data are consistent with the numerical simulation results, which verifies the reliability of the numerical simulation results. With the increase of the distance between support columns, the maximum Mises stress of the original jacking steel pipe, the axial force of the support column, and the ground settlement gradually increase in a specific range. This indicates that the original design scheme can be optimized.

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“…Field observations obtained from this project illustrated that the new technique can reduce the ground loss well and improve the self-stabilizing ability of soil mass, and the detected maximum stress is only 30% of the design value (Zhao et al, 2016). The steel tube slab (STS) structure was another pipe-roofing structure successfully used in the construction of Northeastern Street Station of Shenyang subway line 10 in 2018 (Jia et al, 2019a). The STS structure improved the transverse stiffness with lateral connections including steel flanges and high-strength bolts between adjacent tubes (Cai et al, 2015; Jia et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the flexural mechanism and performance of channel steel tube slab structure under concentrated loads

Zhang

Zhao

Liu

et al. 2020

Advances in Structural Engineering

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Experimental studies about the flexural performance of channel steel tube slab (CSTS) structure subjected to concentrated loads were carried out, with considering various spacing of adjacent tubes, longitudinal spacing between the channel steel and missing tensile channel steel. A self-designed flexural device equipped with particle image velocimetry (PIV) technology was used to monitor continuous structure deformation and concrete cracking characteristics. In this study, the mechanism and performance of CSTS structure serving in underground engineering were analyzed, and a theoretical model for the bearing capacity of the CSTS structure was proposed. The results show that the failure mode of the test specimens exhibits ductile failure with an average ductility coefficient 2.52. The large shear strain of the concrete was obtained from PIV speckle contour, and it shows the same propagation trend compared with the main cracks appearing in the tests. In addition, the tensile channel steel along with decreasing the spacing of adjacent tubes can increase the bearing capacity of the specimens. The proposed theoretical model shows a reasonable prediction of the ultimate bearing capacity of specimens compared with the experimental results.

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Calculating Jacking Forces for Circular Pipes with Welding Flange Slabs from a Combined Theory and Case Study

Cited by 13 publications

References 14 publications

A New Method for Predicting Ground Settlement Induced by Pipe Jacking Construction

A New Method for Predicting Ground Settlement Induced by Pipe Jacking Construction

Research of Pipe Cutting and Support in the Pipe-Roof Pre-Construction Method

Experimental investigation of the flexural mechanism and performance of channel steel tube slab structure under concentrated loads

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