Two Underground Pedestrian Passages Using Pipe Jacking: Case Study

Sun, Yang; Wu, Fei; Sun, Wenjuan; Li, Haimiao; Shao, Guojian

doi:10.1061/(asce)gt.1943-5606.0002006

Cited by 35 publications

(9 citation statements)

References 21 publications

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“…However, this suppressive effect of the existing building decreases with the widening of the distance between the new structure and existing building, which indicates that the existing building performs a function as a soil retaining wall and a partition wall for the new structure. The conclusion is consistent with the actual situation verified by the site monitoring (Sun et al, 2019).…”

Section: Resultssupporting

confidence: 90%

Investigation on the Performance of Pipe Roof Method Adjacent to the Underground Construction

Shimada

Sasaoka

et al. 2021

Geotech Geol Eng

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In this paper, the behaviour of the pipe roof method with different pipe roofs disposition schemes including the pipe roof gate system and L-shaped system is discussed in terms of ground settlement reduction in the condition of underground space construction adjacent to the existing structure by using numerical simulation method. Considering the construction sequences of parallel underground tunnels with rectangular cross sections, the appropriate parameters and ground response characteristics of the corresponding pipe roof methods are evaluated by the ground surface displacement. The results indicated that the construction impacts from new buildings can be reduced by the pipe roof method. However, the theoretical performance of pipe roofs is highly dependent on the spacing between two structures.Generally, the L-shaped system is more effective in case of the distance (D) that is less than or equal to 1/2 width of box culvert (R) under the condition of a new structure constructed nearby the existing building. When two structures are constructed simultaneously, the excavation and the construction of structures influence each other reciprocally. The conclusions could provide a reference for the pipe roof method with the application scenario of adjacent building protection.

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Section: Resultssupporting

confidence: 90%

Investigation on the Performance of Pipe Roof Method Adjacent to the Underground Construction

Shimada

Sasaoka

et al. 2021

Geotech Geol Eng

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“…Yang et al [29] also obtained that if the mud performance can be improved, the jacking force in pipe jacking construction can be reduced and the jacking force can be predicted accurately. Sun et al [30] adopted the field monitoring method to analyze the key parameters in the pipe jacking construction of double line underground pedestrian passage and presented geoenvironmental impacts of the rectangular pipe jacking technology. Zhang et al [31] summarized four calculation methods of jacking force in the process of pipe jacking construction of Gongbei tunnel and compared with a field test.…”

Section: Numerical Simulationmentioning

confidence: 99%

Measurement and Analysis of Settlement Induced by Rectangular Pipe Jacking in Silt Stratum

Tang

Sheng-cai

Zhu

2021

Advances in Materials Science and Engineering

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The large-scale rectangular pipe jacking technology has attracted more and more attention in the construction of urban underground pipe galleries, especially the problem of prediction and control of the surface settlement. Taking the pipe gallery project of Chengbei Road in Suzhou as an example, the settlement values of three groups of monitoring sections under the conditions of natural settlement and synchronous grouting are monitored, and the measured settlement values are compared with Peck formula and random medium theory. The results show that the Peck formula is more accurate in predicting the natural settlement within 1.5 times the pipe jacking width, while the stochastic medium theory is more accurate in predicting the settlement beyond the width. By comparing the field test and theory, the suggestions on the prediction of ground settlement of rectangular pipe jacking of large scale are put forward. The results of this study provide a basis for subsequent related research work and engineering applications.

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“…Besides, the frozen wall formed by the AGF method mainly plays a role in water sealing [6], and its bearing capacity is relatively weak compared with the steel pipe jacking structure. Some successful applications of steel pipe jacking structure in the tunnel excavation are as follows: rectangular pipe jacking construction between two parallel tunnels in Nanjing, China [7], four parallel pipe jacking construction under Guan River, China [8], two steel pipe jacking construction under Yangtze River, China [9], and so on.…”

Section: Introductionmentioning

confidence: 99%

Model Test and Numerical Simulation Analysis on Freezing Effect of Different Freezers in Freeze-Sealing Pipe-Roof Method

et al. 2022

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The Gongbei Tunnel Project is a key phased project of the Zhuhai Connection Line of the Hong Kong–Zhuhai–Macao Bridge, and the freeze-sealing pipe-roof (SFPR) method was first applied successfully. During this period, in order to obtain the best arrangement of freezers, three configurations, that is, solid pipe with circular freezer (SCF), empty pipe with double circular freezer (EDCF), and empty pipe with special-shaped freezer (ESF), were designed to analyze their freezing effects. The model test results show that the freezing temperature fields excited by different arrangements of freezers are obviously different, and the freezing effect of ESF is the best. The numerical simulation results indicate that the temperature cloud diagram of SCF at 42 h is butterfly-shaped after opening the limit pipes, and the temperature cloud diagrams of ESF and EDCF are the same as the model test results. However, the processing method of ESF is relatively complex, which adopts arc angle steel welding requiring a lot of reverse welding and high welding quality. Eventually, EDCF is recommended to ensure the quality of frozen walls due to its lower cost and better freezing effect. This research plays a basic role in the implementation of the freeze-sealing pipe-roof method.

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Two Underground Pedestrian Passages Using Pipe Jacking: Case Study

Cited by 35 publications

References 21 publications

Investigation on the Performance of Pipe Roof Method Adjacent to the Underground Construction

Investigation on the Performance of Pipe Roof Method Adjacent to the Underground Construction

Measurement and Analysis of Settlement Induced by Rectangular Pipe Jacking in Silt Stratum

Model Test and Numerical Simulation Analysis on Freezing Effect of Different Freezers in Freeze-Sealing Pipe-Roof Method

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