Shenzhen Shenda Railroad T4 Tunnel Project

Φ 9.13m CRCHI Duo Mode Slurry/EPB TBM

Project Year: 2024

Project Overview

Project Summary

  • Total Length:

    • Approximately 69.2 km with 11 stations.

  • Design Speed:

    • The railway is designed for a speed of 160 km/h.

  • Significance:

    • Part of the Greater Bay Area's "One-Hour City Rail Transit Circle", an important regional transportation network connecting key cities within the Guangdong-Hong Kong-Macau Greater Bay Area.

  • Project Scope:

    • The section includes 6 stations and 5 interstations, with a total construction length of 31.816 km.

Construction Difficulties

  • Complex Geological Strata:

    • The section passes through a variety of complex geological formations, including soft soils, sand layers, and rock strata.

  • Major Risks:

    • The TBM will sequentially pass beneath several critical structures and risk zones, including:

      • Integrated Utility Tunnels

      • Airport Runways

      • Airport Terminal Building

      • Airport Drainage Culverts

      • Subway Line 12 Airport East Station

      • Ramp Bridges

      • Golf Course

Jello-Mud Results

  • Jello-Mud was injected through the mid-shield reserved grouting holes to form an annular pressurized ring to maintain soil chamber pressure

  • Soil chamber pressure was maintained and screw conveyer had no more soil-spewing.

Onsite surveillance camera captured image of soil-spewing due to failed pressure control before Jello-Mud injection

Onsite surveillance camera captured image (left) of normal screw conveyor operation after Jello-Mud injection. Photo (right) shows the Jello-Mud grouting hole had no water or soil leakage, showing the pressurized Jello-Mud annular protection ring had been formed.

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It all begins with an idea. Maybe you want to launch a business. Maybe you want to turn a hobby into something more. Or maybe you have a creative project to share with the world. Whatever it is, the way you tell your story online can make all the difference.

This is a frequently asked question?

It all begins with an idea. Maybe you want to launch a business. Maybe you want to turn a hobby into something more. Or maybe you have a creative project to share with the world. Whatever it is, the way you tell your story online can make all the difference.

This is a frequently asked question?

It all begins with an idea. Maybe you want to launch a business. Maybe you want to turn a hobby into something more. Or maybe you have a creative project to share with the world. Whatever it is, the way you tell your story online can make all the difference.