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A plastic dowel for straight tunnel segment bolts is a high-strength, durable plastic component that fits into a bolt socket embedded in a concrete tunnel segment. Plastic dowel is also known as plastic socket or plastic sleeve. It serves as a guide for the straight bolt, helping to align the segments accurately and providing shear resistance for the connection.
Advantages
Advantages
These plastic dowels ensure correct alignment, simplify installation, and maintain a consistent and tight tunnel lining.
Fixing the rings with thermoplastic dowels allows for quick and secure installation within tight global tolerances, providing stability.
Function
Function
Alignment: The plastic dowel guides the straight bolt through the center of the socket, ensuring precise alignment between segments during installation.
Shear resistance: It provides resistance to shear forces, which helps maintain the structural integrity of the tunnel lining.
Isolation: In some systems, a plastic component can provide dielectric isolation, preventing the metallic fasteners from acting as a conductor.
Simplified installation: The low force required to insert the bolt into the dowel socket makes the installation process faster and requires less personnel.
Material and design
Material and design
Material: Dowels from Kunshan Signum Machinery Technology Co.,Ltd are often made from high-strength polymers like polyamide (PA66) with fiberglass reinforcement. Besides,plastic dowel and polypropylene dowel can also be available.
Design: The dowel is cast into the concrete segment's socket, with the straight bolt passing through the center of the dowel.
Thread: The corresponding bolt uses a T-round thread designed to engage with the socket's thread.
Manufacturer and Supplier of Plastic Dowel
Manufacturer and Supplier of Plastic Dowel
Kunshan Signum Machinery Technology Co.,Ltd offers plastic dowel for tunnel segments according to clients’ requirements or drawings with competitive price.
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Address: 120 Tongjing Road, Lujia Town, Kunshan, Jiangsu 215331, China
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