GRP examine and repair hole structure and manufacturing method of GRP examine and repair hole and connection tube

Abstract

The invention relates to a manhole buried under the road surface, in particular to a GRP manhole structure and a manufacturing method for a GRP manhole main body and a connecting pipe. The structure of the inspection hole buried under the road surface involved in the present invention includes a main body, a connecting pipe, a flange and the like. The main body and the connecting pipe include: an inner layer made of synthetic resin with glass fiber added inside, an intermediate layer formed by mortar deposited outside the inner layer, and an inner layer formed of mortar deposited outside the intermediate layer and added with glass fiber inside. Outer layer made of synthetic resin. Since the inner and outer layers are made of synthetic resin added with glass fiber, and there is an intermediate layer composed of mortar between the inner and outer layers, the GRP manhole structure has the advantages of light weight, easy construction, elasticity and airtightness Good, long service life and other advantages.

Description

technical field [0001] The present invention relates to the inspection hole buried under the road surface, in particular to the GRP (Glass-fiber Reinforced Plastics) inspection hole structure and the manufacturing method of the main body and connecting pipe of the GRP inspection hole. and glass fiber (Glass-fiber), the GPR manhole of the present invention is light in weight, easy to construct, good in elasticity and water tightness, and has a long service life. Background technique [0002] In general, the inspection hole is set up for maintenance personnel to enter and exit the road surface. The location is generally the place where the diameter or direction of the pipe changes, the base point or intersection, the middle of a long straight pipe, etc. It can also be used for ventilation or Connect the pipes. [0003] As far as the shape is concerned, the circle is the most convenient for construction, and there are also quadrilaterals, ellipses, etc. The surroundings of th...

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Problems solved by technology

[0007] If the concrete is erected on site, it is necessary to prepare a mold of a certain shape first, insert steel bars into the set mold, and then inject concrete, so the construction is more complicated, the project is delayed, and it is easy to cause traffic chaos

[0008] For the situation of directly using concrete products made into a certain shape for construction, it is necessary to manufacture products that meet the specifications in the factory in advance, and then transport them to the construction site for construction. Therefore, large-scale heavy equipment is required, which brings inconvenience to the production process and increases Expenditure

[0009] In addition, the method of integrally forming concrete will reduce the elasticity of the product itself, and the durability against ground vibration and other factors will decrease. At the same time, the watertightness is poor and the service life is correspondingly short

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