Shield tunneling method×西松建設 - List of Manufacturers, Suppliers, Companies and Products

Composite shield construction method

Shield tunneling method that allows for the selection of the face stability mechanism according to ground conditions.

The "Composite Shield Method" is a shield that has a mechanism allowing for the selection of the face stability method according to the conditions of the ground. With a single shield, for ground conditions suitable for earth pressure type shields, stability of the face can be achieved using plastic fluidized excavated soil within the chamber, and for ground conditions suitable for slurry type shields, stability of the face can be achieved using slurry, making it a shield with a wide range of adaptability to ground conditions. 【Features】 ■ A single shield can select a face stability mechanism that corresponds to the soil conditions. ■ In gravel ground, gravel can be directly crushed by a crusher, enabling fluid transport. *For more details, please download the PDF or contact us.

Company：西松建設本社
Price：Other

Civil Engineering Method

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Branch Shield Method (Underground Stem Method)

Constructing two tunnels that intersect in a T-shape with underground branching from the main line shield!

The "Branch Shield Method" is a shield construction technique that simultaneously constructs two intersecting tunnels in a T-shape using a main line shield and a branch shield that launches laterally from within the main line shield. By launching the branch shield directly from within the main line shield, the need for an intermediate shaft is eliminated, and the setting of the branching position is not affected by surface conditions or the presence of buried objects above the pipeline. 【Features】 ■ The main tunnel and branch tunnel can be constructed simultaneously. ■ The branching position is not affected by conditions near the surface. ■ Ground improvement at the branch shield launch point is not required. ■ Shortened construction period and reduced costs. ■ The ratio of the outer diameter of the main tunnel to the outer diameter of the branch tunnel (approximately 60-65% of the outer diameter of the main shield is a guideline). *For more details, please download the PDF or contact us.

Company：西松建設本社
Price：Other

Civil Engineering Method

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Soil pressure type parent-child shield method

Continuously construct two types of tunnels with different cross-sectional diameters within the excavation extension.

The "Soil Pressure Type Parent-Child Shield Method" is a construction method that allows for the continuous construction of tunnels with varying cross-sectional diameters using a single shield within the shield excavation extension. A smaller child shield is incorporated within the parent shield to excavate the parent cross-section tunnel. At a designated position, the child shield is separated and launched underground from the parent shield to construct the child cross-section tunnel. By sliding the rear body of the child shield forward to incorporate it and adopting a method where the rear body is pushed out by the shield jack during assembly, the separation and launch can be completed in a short period. 【Features】 ■ The underground separation method eliminates the need for the installation costs of shafts and securing land at the position of cross-section changes. ■ The rear body push-out method significantly simplifies the assembly work of the child shield. ■ During the separation and launch operations, the front body remains fixed to the parent shield with a reaction pin, maintaining the stability of the face. *For more details, please download the PDF or contact us.

Company：西松建設本社
Price：Other

Civil Engineering Method

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Shield tunneling method×西松建設 - List of Manufacturers, Suppliers, Companies and Products

Shield tunneling method Product List

Composite shield construction method

Branch Shield Method (Underground Stem Method)

Soil pressure type parent-child shield method

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