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Related Experiment Video

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Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels

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Effects on upper masonry structures caused by double-line parallel shield cutting group pile construction.

Xiang Zhu¹, Shi-Ju Ma^2,3,4,5, Kai-Rong Hong^6,7

¹Department of Engineering, Huanghe Science and Technology College, Zhengzhou, 450000, China.

Scientific Reports

|September 27, 2024

Summary

Shield cutting pile construction impacts nearby masonry structures. Advanced grouting techniques and controlled construction parameters effectively mitigated ground disturbance and house settlement during Zhengzhou Metro Line 5 shield tunneling.

Keywords:

Construction parameters Double-line parallel tunnel Masonry structure deformation Measured analysis Shield cutting group pile

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Published on: March 13, 2018

Area of Science:

Geotechnical Engineering
Tunneling Engineering
Structural Engineering

Background:

Shield construction poses risks to existing structures, particularly masonry buildings.
Zhengzhou Metro Line 5 provides a case study for analyzing these effects.

Purpose of the Study:

To investigate the impact of shield cutting piles on masonry structures.
To evaluate the effectiveness of various mitigation strategies.

Main Methods:

Analysis of an actual engineering case involving superimposed double-lane shields.
Monitoring of masonry structure deformations (deflection, twisting).
Implementation and assessment of multiple grouting techniques (clay shock, radial, synchronous, secondary reinforcement).

Main Results:

Masonry structures within 30m (5.0 tunnel diameters) experienced deformation.
Grouting methods significantly reduced ground disturbance.
Controlled construction parameters (pressure, thrust, speed, torque, slurry volume) minimized house settlement.

Conclusions:

Shield cutting pile construction affects nearby masonry structures.
Integrated grouting and controlled construction parameters are crucial for mitigating damage and settlement.