Analysis of Pipe‐Roof in Tunnel Exiting Portal by the Foundation Elastic Model

Luo, Yanbin; Chen, Jianxun; Bao, Lei; Chen, Lijun; Xie, Jiansheng

doi:10.1155/2017/9387628

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…The main problem of application of a pipe umbrella is to determine the load of the rock mass considering the ground-support interaction that is associated with this system. The individual procedures to be used for analysis of the load when calculating the bearing capacity of the pipe umbrella are reviewed in the subsequent part of the paper, based on the most recent researches conducted in this field [8][9][10]12].…”

Section: Figure 1schematic Drawing Of the Pipe Umbrella Methods [2]mentioning

confidence: 99%

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ANALIZA OPTEREĆENJA KOD GRAĐENjA TUNELA SISTEMOM CEVNOG KIŠOBRANA

Lukić¹,

Zlatanović²

2019

Zbornik GFS

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With the intensive construction of the highways, intensive tunnelling works takes place. Contemporary methods of construction are applied. One of these methods is the application of the pipe umbrella system as an excavation support. This primary support system is most commonly used in weak rock masses. Considering this type of supporting system, a special problem is the stability calculation and analysis of loading. In this paper, the individual procedures to be used for analysis of the load when calculating the bearing capacity of the pipe umbrella are reviewed, based on the most recent researches conducted in this field. There is also one example of a load calculation.

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Section: Figure 1schematic Drawing Of the Pipe Umbrella Methods [2]mentioning

confidence: 99%

“…One of the approaches in defining the reliable and relevant analytical models concerning the pipe umbrella system is presented in [8]. In this study, the following assumptions have been adopted:…”

Section: Building the Analytical Modelmentioning

confidence: 99%

ANALIZA OPTEREĆENJA KOD GRAĐENjA TUNELA SISTEMOM CEVNOG KIŠOBRANA

Lukić¹,

Zlatanović²

2019

Zbornik GFS

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“….14311/CEJ.2019.03.0038 473 skeleton by assembling to form the BIM of the entire tunnel project [44,45].…”

Section: Tunnel Skeleton Designmentioning

confidence: 99%

Catia-Based Bim Technology in Highway Tunnel Design

Yang¹,

Lu²,

Qin³

2019

CEJ

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Referring to CATIA's 'assemblies + parts' modeling method, CATIA-based BIM (Building Information Modeling) technology has been proposed for highway tunnel design in this paper. A tunnel BIM is created by CATIA, which is based on a real case in China, focusing on the following 3 aspects: (1) Creating tunnel bolts by UDF + Loop cyclic arrangement method; (2) Using Sketch Tracer module to create tunnel portal; (3) Parameter is used to create and call the Catalog database. Then, bolt collision inspection and U-shaped groove concrete statistics are conducted with the help of the tunnel BIM created. Finally, the finite element analysis of tunnel construction process is carried out through the CATIA-Midas interface. The results demonstrate that the CATIAbased BIM technology can well adapt to the characteristics of tunnel and have well potential applications in tunnel design.

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“…Pipe roof prereinforcement has been proved to be an effective technique to provide a temporary support for the soil before excavation face [35]. Luo et al [36] analyzed the deformation mechanism of pipe roof and deduced the deformation calculation formula of pipe roof in the process of tunnel excavation. Yang et al [37] obtained the relationship between the effective length of pipe roof and the height of excavation face.…”

Section: Introductionmentioning

confidence: 99%

Deformation Characteristics of Existing Twin Tunnels Induced by Double Shield Undercrossing with Prereinforcement: A Case Study in Hangzhou

Wei

Zhang

et al. 2021

Advances in Civil Engineering

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This paper is based on the case of the earth pressure balance (EPB) shield tunnelling project of the new Metro Line 2 undercrossing the existing Metro Line 1 in the soft soil urban area of Hangzhou. Because the EPB shield must break through a plain concrete wall before undercrossing the existing tunnels, the pipe roof prereinforcement was adopted to stabilize the soil between the existing tunnels and the new shield tunnel. The deformation characteristics of the existing tunnels in the process of double shield undercrossing were discussed. According to the variation of shield position, the settlement development could be divided into three stages: shield approaching subsidence, shield crossing heave, and shield leaving subsidence. The horizontal displacement shows a back and forth variation characteristic consistent with the direction of shield tunnelling. At the junction of tunnel and station, the shield undercrossing caused considerable differential settlement between the existing tunnel and the station. The construction of pipe roof prereinforcement will lead to the presettlement of the existing tunnels. The settlement of the existing tunnels caused by the attitude deviation of pipe roof and grouting disturbance should be reduced in reasonable ranges. In addition, the maximum longitudinal settlement of the existing tunnel during the shield second undercrossing was also discussed. It was considered that the influence of wall breaking is greater than the sequence of shield undercrossing. The driving parameters of shield tunnelling should be optimized before the second crossing.

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Analysis of Pipe‐Roof in Tunnel Exiting Portal by the Foundation Elastic Model

Cited by 9 publications

References 12 publications

ANALIZA OPTEREĆENJA KOD GRAĐENjA TUNELA SISTEMOM CEVNOG KIŠOBRANA

ANALIZA OPTEREĆENJA KOD GRAĐENjA TUNELA SISTEMOM CEVNOG KIŠOBRANA

Catia-Based Bim Technology in Highway Tunnel Design

Deformation Characteristics of Existing Twin Tunnels Induced by Double Shield Undercrossing with Prereinforcement: A Case Study in Hangzhou

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