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Shield prefabricated segment

A technology of shield prefabricated segments and shield prefabricated tubes is applied in shaft linings, tunnel linings, underground chambers, etc., which can solve the problems of difficult cutting of steel bars, property damage, dangerous tunnel traffic safety, etc., and reduce the labor intensity of workers. , the effect of saving time and cost, reducing transportation costs

Inactive Publication Date: 2018-12-11
江苏海川新材料科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The concrete reinforcement of traditional prefabricated segments often uses steel bars. During the production process, the steel bars are not easy to cut and often damage the cutting tool. The steel bars are easy to corrode in the cold and humid underground environment. It is greatly discounted, and it will cause deformation, which will affect the service life of the prefabricated segment, endanger the safety of tunnel traffic, and cause heavy property loss and casualties

Method used

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  • Shield prefabricated segment

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Embodiment

[0020] Example: such as figure 1 As shown, a shield prefabricated segment, the shield prefabricated segment main body 1 is made of concrete and is arched as a whole, including an inner surface 2 and an outer surface 3, and the inner surface 2 is provided with a boss 4 for The reinforcement in the concrete for pouring the shield prefabricated segment adopts glass fiber reinforcement, and also includes a thermoplastic interlayer 6. The thermoplastic interlayer 6 is arranged on the outer surface 3. The softening temperature of the thermoplastic interlayer 6 exceeds 110°C, preferably at 140 to 100°C. Materials made between 170°C. The thermoplastic barrier 6 should advantageously have at least a small degree of elasticity to be able to overcome stresses caused, for example, by temperature-induced differences in expansion between the thermoplastic barrier 6 and the shield prefabricated segments, without the thermoplastic barrier 6 being Damaged or torn and the sealing function of t...

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Abstract

The invention relates to the technical field of road and bridge construction, and concretely discloses a shield prefabricated segment which can be used in tunnel construction. The main body of the shield prefabricated segment is poured by concrete and is arched as a whole. The shield prefabricated segment includes an inner surface and an outer surface. A convex platform is arranged on the inner surface. Reinforcement in the concrete used for pouring the shield prefabricated segment adopts a glass fiber reinforced polymer. Compared with conventional concrete reinforcement which adopts steel bars, the shield prefabricated segment adopts the glass fiber reinforced polymer as the reinforcement which has corrosion resistance, can prolong the whole life of the shield prefabricated segment, has high tensile strength which is about twice the load of ordinary steel bars of the same specification, and is light in weight which is only one quarter of the weight of the steel bars of the same specification. Therefore, shield prefabricated segment greatly reduces the labor intensity of workers, reduces the transportation cost, can be easily cut so as to avoid damages to cutting heads in the production process, and can save time and cost.

Description

technical field [0001] The invention relates to the technical field of road and bridge construction, in particular to a shield prefabricated segment, which can be used for tunnel construction. Background technique [0002] The shield segment is the main assembly component of shield construction and the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads. The shield segment is the permanent lining structure of the shield tunnel. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel. [0003] The shield construction method has become the preferred construction method for interval tunnels in the rail transit field, and this construction method is also widely used in the fields of roads, hydraulic engineering and railways. [0004] In the subway construction, the shield prefabricated segmen...

Claims

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Application Information

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IPC IPC(8): E21D11/08
CPCE21D11/08E21D11/086
Inventor 赵强赵正杨
Owner 江苏海川新材料科技有限公司
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