FIBERGLASS TUBE FOR UNDERGROUND PASSAGE AND THE MANUFACTURING METHOD

摘要

PURPOSE: A fiberglass tube for an underground passage is provided to shorten working hours for constructing an underground passage and to reduce the required costs for maintenance. CONSTITUTION: The fiberglass tube for an underground passage comprises: an outer layer made with high-strength glass fiber(68) and high molecular resins(64) to prevent an inflow of underground moisture and chemical components into an underground passage and forming an outer wall of the fiberglass tube; an inner layer placed in the outer layer and formed in the same composition as the outer layer to form an inner wall of the fiberglass tube; and an intermediate layer interposed between the outer layer and the inner layer to provide impact resistance to the underground passage.