JPH0624285U - Underground pipe base - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a nozzle base for underground pipes that does not bend after pipe construction. A block body is formed by mixing a water-soluble substance or a collapsible substance into earth and sand, and an arc surface that substantially matches the outer peripheral surface of the pipe is formed on the upper surface of the block body. [Effect] The buried pipe does not bend after the pipe construction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a nozzle for mounting a pipe to be buried underground.

[0002]

[Prior art]

 In recent years, ribbed pipes having flange-shaped ribs provided on the outer peripheral surface of a synthetic resin pipe at predetermined intervals in the pipe axial direction have been used as sewer pipes for underground burying. When burying this ribbed pipe in the ground, the bottom of the excavated groove is tamped and flattened, and the nozzles are placed at a predetermined interval on the groove bottom, and the ribbed pipe is placed on the nozzle. After that, the pipe sill was backfilled with the nozzle on the underside of the pipe.

[0003]

[Problems to be solved by the device]

 However, when the pipe is buried in the ground in this way, the lower surface side of the ribbed pipe will be supported by earth and sand, etc., and will also be supported by the highly rigid nozzles arranged at regular intervals. Become. Therefore, when earth pressure, wheel load, etc. act on the upper surface side of the ribbed pipe, the portion supported by earth and sand sinks downward, and the solid portion mixed in the fluid in the pipe accumulates on this flexible portion. As a result, poor water flow could occur.

The present invention has solved the above problems, and provides a nozzle base for an underground buried pipe in which the pipe is not bent after the pipe construction.

[0005]

[Means for Solving the Problems]

 The present invention is characterized in that a water-soluble substance or a collapsible substance is mixed with earth and sand to form a block body, and an arcuate surface that substantially matches the outer peripheral surface of the pipe is formed on the upper surface of the block body. Is.

[0006]

[Action]

 Since an arcuate surface that substantially coincides with the outer peripheral surface of the pipe is formed on the upper surface of the nozzle base, the pipe can be placed on the arcuate surface and piped horizontally or with a predetermined gradient. In addition, since the block body was formed by mixing a water-soluble substance or a collapsible substance into the sediment, etc., when the block body collapsed after the buried piping, this became familiar with the soil and the like put into the lower surface of the pipe. The bottom surface of the pipe is evenly supported by earth and sand along the pipe axial direction.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a partial sectional side view showing a construction state of a pipe using the nozzle of the present invention, FIG. 2 is a front view of the construction state shown in FIG. 1, and FIG. 3 is a perspective view showing another embodiment of the nozzle. In the figure, 1 is a ribbed pipe and 2 is a nozzle. The ribbed pipe 1 is a synthetic resin pipe made of vinyl chloride resin or the like, on which a flange-shaped rib 11 orthogonal to the pipe axis is provided on the outer peripheral surface. The rib 11 is provided at a predetermined interval in the pipe axial direction. ing.

On the other hand, the nozzle 2 is formed by mixing a water-soluble substance or a collapsible substance into earth and sand excavated to form an excavation groove in a block body, and the upper surface of the block body. An arcuate surface 21 that substantially matches the outer peripheral surface of the ribbed pipe 1 is formed on the. If a pedestal 22 as shown in FIG. 3 is integrally provided on the lower part of the nozzle stub 2, it is possible to prevent the nozzle stub 2 from collapsing and to pipe the ribbed pipe 1 in a stable state.

Examples of the water-soluble substance include polyacrylamide, polyvinyl alcohol, polyethylene glycol and the like. Further, as the disintegrating substance, a biodegradable polymer to which starch or the like is added, a photodegradable ethylene-carbon monoxide copolymer, or an additive material having a photosensitivity to cleave the polymer main chain into the polymer The thing which mixed is mentioned.

When burying the ribbed pipe 1 in the ground using this nozzle 2, first, an excavation groove is dug, and the bottom surface of this groove is tampered with an octopus or the like and ground until it becomes substantially flat. On the other hand, a block-shaped nozzle 2 is formed by mixing a water-soluble substance or a collapsible substance with the excavated earth and sand. Therefore, the nozzle stubs 2 are arranged on the bottom surface of the flattened groove at a predetermined interval, and the pipes 1 with ribs are placed on the respective nozzles 2 and sequentially connected, and the pipes 1 with ribs are attached using a level or the like. Pipe horizontally or with a predetermined slope.

Lastly, earth and sand or the like is put into the lower surface side of the ribbed pipe 1 to solidify it, and then the excavation groove is backfilled with earth and sand or the like to complete the pipe construction. When the nozzle stub 2 supporting the lower surface of the ribbed pipe 1 collapses after the buried piping, it becomes compatible with the earth and sand put into the lower surface side of the ribbed pipe 1, and the lower surface of the pipe is covered with earth and sand and the like in the pipe axial direction. Equally supported. In addition, in the above-mentioned embodiment, the case where the pipe with the rib having the flange-shaped rib on the outer peripheral surface of the pipe is buried is illustrated. However, the nozzle base of the present invention is an ordinary synthetic resin pipe without the rib. It can also be used when buried in.

[0012]

[Effect of device]

 As described above in detail, since the present invention forms the arcuate surface on the upper surface of the nozzle base, which substantially coincides with the outer peripheral surface of the pipe, the pipe can be placed on the arcuate surface and piped horizontally or with a predetermined inclination. In addition, since the block body was formed by mixing a water-soluble substance or a collapsible substance into sediment etc., when the block body collapsed after buried piping, this became familiar with the soil etc. that was thrown into the lower surface of the pipe. The entire bottom surface of the pipe is evenly supported by earth and sand. Therefore, even if earth pressure, wheel load, etc. act on the upper surface of the pipe after pipe construction, the pipe does not partially sink, and solids mixed in the fluid inside the pipe are deposited in the flexed portion to allow water to flow. No defects will occur.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing a construction state of a pipe using a nozzle of the present invention.

FIG. 2 is a front view of the construction state shown in FIG.

FIG. 3 is a perspective view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Ribbed pipe 2 Tube base 11 Rib

Claims (1)

[Scope of utility model registration request] 1. A nozzle for mounting a pipe to be buried in the ground, wherein a water-soluble substance or a collapsible substance is mixed with soil or the like to form a block body, and the block body is formed on the upper surface of the block body. An abutment for an underground pipe that is characterized by forming an arc surface that substantially matches the outer peripheral surface of the pipe.