Next Article in Journal
A Sharp Oscillation Criterion for a Linear Differential Equation with Variable Delay
Previous Article in Journal
Some Fixed Point Theorems for Quadratic Quasicontractive Mappings
Open AccessArticle

Risk Control Standard and Construction Control Technology of Shield Tunnel Passing through Irregular-Plate Bridge

by Yougang Hu 1,2,3,* and Ping He 1,*
1
School of Civil and Architectural Engineering, Beijing Jiaotong University, Beijing 100044, China
2
Beijing Rail Transit Construction Management Co., Ltd., Beijing 100037, China
3
Beijing Key Laboratory of Fully Automatic Operation and Safety Monitoring for Urban Rail Transit, Beijing 100037, China
*
Authors to whom correspondence should be addressed.
Symmetry 2019, 11(11), 1331; https://doi.org/10.3390/sym11111331
Received: 4 October 2019 / Revised: 22 October 2019 / Accepted: 22 October 2019 / Published: 24 October 2019
As a kind of statically-indeterminate point-support structure, the irregular-plate bridge (IPB) is extremely sensitive to the settlement of pier columns, and the stress of the plate is complicated. Because of the limitation of environmental conditions, the newly-built subway circular symmetric shield tunnel needs to pass the pier foundation of the IPB perpendicularly. To control the engineering risks, the pier settlement value must be known, and measures should be taken to reduce the settlement. This paper takes the project of the Beijing subway circular symmetric shield tunnels passing the existing IPB of the Guang’anmen Bridge as an example. First, the stress characteristics and settlement control standards of the IPB are analyzed, and then the technical scheme of synchronous jacking and key points of risk control during the construction of the shield passing the IPB are put forward. The relationship between the excavation face pressure of the shield tunnel and pier foundation settlement, and the ground settlement, are then analyzed. Finally, structural cracking after construction is analyzed, and the analysis shows that synchronous jacking technology can effectively control the settlement value of the subway tunnel passing the IPB. The technology is a feasible method for controlling the safety of a tunnel passing through a sensitive, statically-indeterminate bridge, and this work is a successful experience for similar major risk projects. View Full-Text
Keywords: symmetric shield tunnel; irregular-plate bridge; risk control; synchronous jacking; settlement control symmetric shield tunnel; irregular-plate bridge; risk control; synchronous jacking; settlement control
Show Figures

Figure 1

MDPI and ACS Style

Hu, Y.; He, P. Risk Control Standard and Construction Control Technology of Shield Tunnel Passing through Irregular-Plate Bridge. Symmetry 2019, 11, 1331.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop