JPH09163576A - Connection structure and connection method of conduit in manhole, etc. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a worker to perform the positioning and connection to a manhole aperture of a conduit properly and quickly even if he is not a specialist, and improve work efficiency and durability of connection of a mortar part. SOLUTION: This connection structure has an opening 16 for connection of a conduit 300 and a salient outer block part 20 surrounding this opening in generally U shape, at the sidewall 14b of the hollow box 12, and the salient outer block part has a coupling receiver 24 where an outer mortal molding box 22a having caught a conduit can be fixed to the outer surface of this salient outer block part and an inner mortal molding box 22b can be fixed to the inner side of the aperture. The term of construction can be shortened, and the work cost can be reduced by performing the temporary fixing of the conduit and the attachment of the molding box properly and quickly to the manhole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole installed at a confluence of pipes laid in the ground, and more particularly to a structure and a connecting method for connecting pipes to manholes.

[0002]

2. Description of the Related Art Conventionally, a manhole that is buried in the ground is crushed by hammering a thin wall portion provided on a side surface, and a cable for communication or power transmission is opened in the opening portion. By connecting the pipes to be placed and sewer pipes, etc., a mold is provided inside and outside the opening, and by placing mortar in this form, the pipes and sewer pipes are connected and fixed to the manhole. ing.

[0003]

[Problems to be Solved by the Invention] However, when the pipes and sewer pipes and the manhole are communicated and connected by the conventional manhole structure, the side face of the formwork which is aligned by laying a piece of wood or the like under the supporting rod is supported. Support by pushing with
It was necessary to attach the formwork to the inside and outside of the wall surface where the crushing opening was formed. If the formwork is fixed in this way, the fixing of the formwork becomes unstable because there are no catches etc. that fix the support rods inside the manhole, etc., causing the cast mortar to flow out and connecting the manhole and the mortar part. There is a risk that the durability may be reduced and water may leak. In addition, if the concrete is not hardened and then backfilled after the mortar has been cast, misalignment of the conduit connection and positioning due to the form is likely to occur, and it is necessary to provide a curing period, resulting in a long construction period. . In addition, the end face of the pipeline laid in the ground is fixed to the outside formwork, but since fixing the formwork is complicated as described above, connect the pipeline and formwork at the correct position. Was difficult. Furthermore, in such a formwork installation work, skill is required for the work, it is difficult to secure workers, and the positional accuracy with respect to the manhole opening of the pipeline cannot be secured by the conventional formwork support method. Because of this,
There was a problem in that the durability of the connection between the pipe and the manhole after the mortar was cured caused, and the pipe was damaged or water leaked into the manhole as the years of use progressed.

The present invention has been made in view of the above-mentioned problems of the prior art. The present invention has been completed in a short construction period with a simple structure, and the positioning work for connecting a pipe to a manhole opening can be performed quickly even by an unskilled person. It is another object of the present invention to provide a pipe line connecting portion structure for a manhole or the like and a connecting method thereof, which can be surely performed and can significantly improve the connection durability of the mortar portion.

[0005]

In order to achieve the above-mentioned object, the invention relating to the connecting portion structure 10 of the pipeline to the manhole or the like of claim 1 is an integral type or split type hollow box-shaped body, The opening 16 for connecting the pipeline formed in the side wall 14b of the hollow box-like body, and the opening 1 protruding from the side wall 14b to the outside while forming the mortar charging notch 18 in the upper part.
6 is provided so as to surround 6 and the outer mortar mold 22a is fixed to the outer surface of the projecting outer shell 20 in a lid shape, and the opening 16 of the opening 16 is formed. An inner mortar frame 22b for covering the opening 16 is provided on the inner surface of the side wall 14b, and the side wall 14 around the opening 16 is provided.
b These mortar molds 24 are provided on the inner and outer surface sides of the side wall 1
A connection receiving portion 24 for fixing to 4b is provided and configured.

Further, the invention relating to the connecting portion structure 10 of the pipeline to the manhole or the like of claim 2 is the projecting outer shell portion 20.
May be formed in a substantially U shape in a front view.

Further, in the invention relating to the connecting portion structure 10 of the conduit for the manhole and the like of claim 3, the connecting receiving portion 24 on the outer surface side of the side wall for fixing the outer mortar formwork has the projecting outer shell 20. It may be provided on the protruding end surface.

Further, in the invention relating to the connecting portion structure 10 of the conduit for the manhole and the like of claim 4, the connection receiving portion 24 may be a nut 32 or a bolt member embedded in the inner and outer surfaces of the side wall 14b. .

Further, in the invention relating to the connecting portion structure 10 of the pipeline to the manhole etc. of claim 5, the size of the opening on the outer surface side of the opening 16 is the same as the size of the opening on the inner surface side of the opening 16. The size may be smaller than that.

Further, the invention relating to the connecting portion structure 10 of the pipeline to the manhole or the like of claim 6 is the projecting outer shell portion 20.
And the outer surface of the opening 16 surrounded by the projecting outer shell 20 is rougher than other side wall surfaces.
6 may be provided.

Further, in the invention relating to the connecting portion structure 10 of the pipeline to the manhole etc. of claim 7, the inner mortar form 22b on the inner surface side of the side wall 14b completely closes the opening surface on the inner surface side of the side wall 14b. The outer mortar formwork 22a on the outer surface side of the side wall 14b may be a plate material in which the fitting hole 38 of the pipeline to be laid is escaped.

Further, according to the invention relating to the connecting method of the pipeline to the manhole or the like in claim 8, the sidewall 14b is formed so as to surround the opening 16 for connecting the pipeline formed in the sidewall 14b of the hollow box-shaped body. A projecting outer shell portion 20 which is cut out upward is formed on the outer surface side, and a connection receiving portion 24 for fixing the mortar form is provided on the inner surface around the opening 16 of the side wall 14b, and the projecting outer shell portion 20 is provided. A connection receiving portion 24 for fixing the mortar mold is also provided on the projecting end face, a pipe is inserted into the opening 16 for positioning, and the mortar mold is fixed to fix the mortar mold 20 from the notch of the rib outer portion 20 to the opening 16. It is constructed by putting mortar into the internal space.

[0013]

In the structure for connecting a conduit to a manhole or the like according to the first aspect of the present invention, there is provided a hollow box-shaped body of integral type or divided type, and a pipeline connection formed on the side wall of the hollow box-shaped body. An opening portion and a projecting outer shell portion that is provided so as to surround the opening portion while forming a mortar charging notch on the upper side and projecting outward from the side wall, and on the outer surface of the projecting outer shell portion. The outer mortar mold is fixed in a lid shape, and the inner mortar mold covering the opening is provided on the inner surface of the side wall of the opening, and the inner mortar mold around the opening is provided on the inner and outer side walls of the side wall. Is provided with a connection receiving portion for fixing the mortar formwork to the side wall. Since a projecting outer shell is provided on the peripheral edge of the opening of the side wall of the hollow box-shaped body as the manhole body, and a connecting receiving part is formed in advance on the end face in the projecting direction of this projecting outer shell, the connecting receiving part is, for example, By forming from an embedded nut or the like, the outer mortar formwork can be easily attached to the nut as the connection receiving portion and can be connected and fixed. At the same time, the inner mortar formwork is connected to the connection receiving portion so as to cover the opening on the inner surface of the side wall.
Then, in addition to the void corresponding to the wall thickness formed by the opening, the projecting space corresponding to the projecting outer shell is further formed, and the mortar charging space is expanded, and the strengthening of the connection part is realized. It Not only that, because the upper part of the projecting outer shell is provided with a notch for mortar injection that has been cut out in advance, an opening for mortar injection is formed when the mold is abutted and fixed, and mortar injection work is also accomplished. It can be done easily without any need. Therefore, by this, the whole construction work of the mold for the manhole etc. can be performed quickly and accurately without requiring skill, and moreover, by only pouring the mortar into the mortar feeding notch formed in the upper part,
Mortar can be placed. It is possible to reduce the burden on the operator and improve the work efficiency while improving the connection durability between the placed mortar and the opening. The outer mortar formwork is attached to the projecting end face of the projecting outer shell perpendicular to the ground surface, and is not affected by the force and weight of the soil when covering it with soil, and it is due to the displacement of the formwork before mortar hardening. No mortar outflow. As a result,
It is possible to fill the manhole immediately after placing the mortar, shortening the construction period required for the work and reducing the work cost.

In the structure for connecting a conduit to a manhole or the like according to the second aspect of the present invention, the projecting outer shell is formed in a substantially U-shape in a front view. By mounting the outer mortar mold on the end surface of the projecting outer shell in the projecting direction, it is possible to form an oblong mortar charging notch between the upper portion and the side wall of the outer mortar mold. Thereby, when the mortar is charged, for example, the mortar can be directly charged with a concrete mixer or the like,
The burden on the operator can be reduced, the mortar can be quickly placed, and the work cost can be reduced. If it is U-shaped,
The structure is simple and the cost can be kept low even when integrally formed as a manhole.

In the structure for connecting a pipe to a manhole or the like according to a third aspect of the present invention, the connection receiving portion on the outer surface side of the side wall for fixing the outer mortar frame is provided on the projecting end surface of the projecting outer shell. Has been. The adhesion between the outer mortar mold and the projecting outer shell can be reliably maintained, and the connection function with the connection receiving part can be easily realized. The outer mortar mold can be easily mounted in contact with the end face in the protruding direction of the projecting outer shell, and the work of mounting the outer mortar mold can be done without the need for skilled technology, reducing the work time. Is possible. The outer mortar mold can be installed at a position protruding from the side wall, and the thickness of the mortar cast into the mold can be increased, resulting in improved durability of connection between the mortar and manhole in this part. Is possible.
Therefore, it is possible to prevent damage to the mortar portion due to an earthquake or the years of use, and to prevent water leakage from the connection portion between the mortar and the manhole.

In the structure for connecting a conduit to a manhole or the like according to a fourth aspect of the present invention, the connection receiving portion is a nut or bolt member embedded in the inner and outer surfaces of the side wall. The connection receiving portion can be easily configured by only including the step of embedding the nut or the bolt in the side wall or the protruding outer portion. When connecting and fixing the molds, the mortar mold can be attached to the projecting outer shell and the inner surface of the side wall simply by tightening the nuts or bolts, quickly and accurately without requiring skill. As a result of being able to attach the mortar formwork to the inside and outside of the side wall, the work time required for fixing the mortar formwork can be shortened and the work efficiency can be improved. Since the connection receiving portion can be configured with a simple configuration, it is possible to reduce manufacturing cost.

In the structure for connecting a conduit to a manhole or the like according to the present invention, the size of the opening on the outer surface side of the opening is smaller than the size of the opening on the inner surface side of the opening. Has been done. The mortar cast between the outer mortar mold and the inner mortar mold has a smaller opening on the outer surface side of the opening, so a particularly high strength can be maintained with respect to tensile stress, and the cured mortar part can be secured. As a result of being able to hold the connection, the connection durability between the manhole and the mortar part is greatly improved. As a result, even if a pipe connection structure for a manhole or the like is buried near a facility that constantly vibrates underground, such as a railway or road, the mortar will not separate and fall off. .

In the pipe connecting portion structure for a manhole or the like according to the sixth aspect of the present invention, an outer surface surrounded by the projecting outer portion of the inside of the projecting outer shell portion and the opening of the projecting outer shell portion is more than a side wall surface. Is also provided with a rough surface portion. The joint surface between the mortar and the rough surface, which is placed between the outer mortar mold and the inner mortar mold, is joined in a concave-convex shape, so that the joining force can be maintained strongly and the connection durability between the manhole and the mortar part can be maintained. It is possible to improve the property. Since the placed mortar and the joint are connected uniformly in the surface state,
It is possible to prevent peeling of this portion when using the structure for connecting the pipe to the manhole or the like. As a result, it is possible to prevent water leakage into the structure of the connecting portion of the pipeline to the manhole or the like. In addition, the mortar does not peel off even if the pipe connection structure for a manhole or the like is used in a harsh environment where vibration is applied to the ground.

In the pipe connecting structure for a manhole or the like according to the invention of claim 7, the inner mortar formwork on the side wall inner surface side is a plate material that completely closes the opening surface on the side wall inner surface side. At the same time, the outer mortar formwork on the outer surface side of the side wall is a plate material in which the fitting holes of the pipeline to be laid are escaped. Since it is a plate material, it is lightweight, and a notch hole for fitting a pipe line or the like can be easily formed as a frame. Further, it is easy to handle, and the temporary fixing of the pipeline and the mounting of the form at the time of placing the mortar can be performed quickly and reliably, so that the working efficiency can be improved and the working cost can be reduced.

In the method of connecting a conduit to a manhole or the like according to the invention of claim 8, the pipe is connected to the outer surface of the side wall of the hollow box so as to surround the opening for connection of the conduit. Forming a notched outer shell, and providing a connection receiving portion for fixing the mortar mold on the inner surface around the opening of the side wall, and fixing the mortar mold on the protruding end surface of the protruding outer shell. The connection receiving portion is provided, the pipe is inserted into the opening portion for positioning, the mortar form is fixed, and the mortar is introduced into the internal space of the opening portion from the notch of the rib outer portion. It is possible to quickly and surely attach the temporarily fixed frame to the manhole opening without requiring the skill of an operator. Since the mortar can be easily charged through the opening for charging the mortar formed by the above, it is possible to reduce the burden on the operator and shorten the time required for the work. And, in addition to the void of the opening, the mortar input space is expanded only by the protruding space part formed by the protruding outer part, increasing the strength of the connection part to the manhole of the pipeline and ensuring high durability. To do.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall perspective view of a manhole in which a pipe connecting structure 10 for a manhole or the like according to an embodiment of the present invention is implemented. In the figure, a hollow box-shaped body 12 as a manhole body has a required wall thickness. In the above, the concrete wall is formed as a hollow quadrangular shape as a whole, and the upper wall 14a having the entrance 26 on the top surface and the side wall 1 formed on the four sides are formed.
It is provided with 4b and 14c and a bottom wall 14d. In the embodiment, the hollow box-shaped body 12 is integrally formed by casting concrete into a square shape.

Opposing side walls 14 of the hollow box-shaped body 12
b and 14b have openings 16 and 16 for connecting conduits, respectively, and the ends of conduits 300 such as cables to be connected to the openings 16 are arranged at predetermined positions. 12 and the pipe are connected to each other to form a connecting portion. This hollow box-shaped body 12 has a hollow region 30 for work therein, and the direction, slope, place where the pipe diameter changes, where a pipe diameter changes, a step occurs, and a confluence point. And, it is used by being buried underground to correspond to the starting point. In this embodiment, the hollow box-shaped body 12 as the manhole body is integrally formed of concrete.
For example, as shown in FIG. 11, it may be formed of a hollow box-shaped body 12a that can be divided into a plurality of pieces.

In FIGS. 1 and 2, the openings 16 and 16 are formed in a square shape in the substantially central portion of the opposing side wall 14b. The end of the conduit 300 is connected to the opening 16, and the conduit connection structure 10 for a manhole or the like according to the present invention is formed in the opening 16. As shown in FIGS. 3 and 10, the opening 16 is formed so that the size of the opening on the outer surface side is smaller than the size of the opening on the inner surface side of the opening 16. This prevents the mortar from being easily separated from the inside of the opening 16 after charging the mortar, as will be described later.

In this embodiment, the size of the mouth of the opening 16 is from the inner surface side to the outer surface side of the side wall 14b.
It is formed to be funnel-shaped, but this is
For example, the shape may be such that an enlarged portion is formed in the opening on the inner surface side of the opening 16. Further, in this embodiment, the opening 1
Although 6 is formed in a square shape, it may be formed in a rectangle, a circle, or the like. Further, although the opening 16 is opened through the side wall 14b of the hollow box-shaped body, it may be opened through the upper wall 14a, the side wall 14c, and the bottom wall 14d of the manhole.

As shown in FIGS. 1 and 2, on the outer side of the side wall 14b of the manhole, there is provided a projecting outer shell portion 20 having a substantially U shape in a front view, which is cut out so as to surround the opening portion 16. Has been. In this embodiment, the projecting outer shell 20
Is projected to the outer surface side of the side wall 14b so as to form a substantially trapezoidal shape in cross section, and is integrally formed with the hollow box-shaped body 12 made of concrete. The projecting outer shell portion 20 forms a raised portion projecting from the outer surface of the side wall around the opening portion 16 to form a mortar holding space at the time of pipe line connection work, and also fixes the mortar formwork. It will form the basis for making work easier. Therefore, the projecting outer shell portion 20 is formed such that a shell protruding from the outer surface is formed so as to surround the opening portion, and at the same time, the mortar feeding notch 1 is formed above.
It has a shape including 8. In the embodiment, the rectangular U shape is formed by notching the upper part, but it may be V shape, W shape, rectangular shape, semicircular shape or any other shape in front view.

In the present embodiment, the projecting end surface of the projecting outer shell 20 has a projecting surface 21 formed in a flat plane. Therefore, as will be described later, the outer mortar mold can be brought into close contact with the outer mortar mold, and mortar leakage during mortar placement can be reliably prevented.

One feature of the present invention is that the outer mortar formwork is fixed to the outer surface of the projecting outer shell 20 in a lid shape, and the inner wall of the opening covers the inner wall of the opening. The mortar mold is provided, and the connection receiving portions for fixing these mortar molds to the side wall are provided on the inner and outer surface sides of the side wall around the opening. In FIGS. 1 and 3, the protruding surface 21 serving as the protruding end surface of the protruding outer shell portion 20 includes:
A connection receiving portion 24 is provided. The outer coupling receiving portion 24a provided on the outer surface side with respect to the side wall 14b is the projecting outer shell 2
The nut 32 is embedded in the protruding surface 21, which is the protruding end plane of 0. In the present embodiment, the nuts 32 are embedded and fixed in nine places on the projecting surface 21 at intervals.

On the other hand, as shown in FIG. 3, the inner surface side of the side wall 14b is a flat wall surface as shown in FIG. 10, and the inner connection receiving portion 24 surrounds the periphery of the opening 16.
b are provided at intervals. That is, 12 nuts 32 are attached so as to be embedded in the wall surface. The frame 22 can be easily fixed by these connection receiving portions 24a and 24b, and the time required for connecting the pipelines can be greatly reduced.

The inner surface of the projecting outer shell portion 20 and the outer surface of the opening 16 surrounded by the projecting outer shell portion 20 have a rough surface portion 36 formed to be rougher than other side wall surfaces. . In the present embodiment, as shown in FIGS. 1 and 2, the rough surface portion 36 has rough irregularities on the inner surface of the projecting outer shell 20 and the outer surface surrounded by the projecting outer shell 20 of the opening 16. It is configured by providing. As a result, the mortar cast and formed in the projecting outer shell 20 can be securely and strongly connected and fixed to the outer surface of the side wall 14b. Further, since it is possible to prevent the side wall 14b and the mortar to be placed from being easily separated, it is possible to prevent water leakage during use of this portion.

Form 22 is fixed to the outer surface and inner surface of the side wall 14b. That is, in the embodiment,
Regarding the outer surface side of the side wall 14b, the outer mortar mold 22
a is fixed on the projecting surface 21 which is the projecting end surface of the projecting outer shell 20, and the inner surface side of the side wall 14b is simply a side wall inner surface so that the inner mortar mold 22b closes the opening of the opening 16. It is fixed by applying.

An outer mortar mold 22a made of a plate material is fixed to the projecting surface 21 of the projecting outer shell 20 via a connection receiving part. That is, the inner mortar mold on the side wall inner surface side is a plate material that completely closes the opening surface on the side wall inner surface side, and the outer mortar mold on the side wall outer surface side is also formed from a plate material.

The outer mortar mold 22a is composed of mold pieces 23a, 23b and 23c which are vertically divided into three, as shown in FIG. Arc-shaped notches are formed so as to be obtained. These arc-shaped cutouts form a circular insertion hole 38 when the mold pieces 23a, 23b, 23c are assembled into a single plate. The fitting hole 38 is formed to be slightly smaller than the pipe diameter on the end face side of the conduits 300, 300 laid in the ground.

A plurality of mounting holes 40a are bored in these mold pieces 23a, 23b, 23c, and a connecting bolt 34 to be screwed into a nut 32 as a connecting receiving portion of the projecting outer shell 20 is attached. Insert it. Therefore, the mounting hole 40a
Are the mold pieces 23a. . . Are formed in a position corresponding to the nut 32 embedded in the projecting surface 21 when they are in a butt shape and integrated as a single plate.

In the present embodiment, the outer mortar mold 22a
Is divided into three parts in the vertical direction, but it may be formed in three parts in the horizontal direction, for example. Further, it is not always necessary to divide it into three parts, and for example, it may be formed by an integral type or a plurality of parts such as two parts or four parts or more.

In the figure, reference numeral 42 denotes a reinforcing frame member having an L-shaped cross section, in which the connecting end portion of the pipe line to be buried is projectingly disposed in the arcuate notch, and the form frame 22 is assembled in a plate shape. It is used by applying it to the edge of the outer surface in the state. This reinforcing frame member 4
2 is a member for vertically abutting the outer edge portion of the vertical side of the opening 16 in the drawing, and the mold pieces 23a. . . A bolt hole is formed at a position corresponding to the mounting hole 40a. Therefore, with the reinforcing frame member 42 attached to the mold piece, the connecting bolt 34 is inserted and screwed into the connection receiving portion 24 to form the mold 22.
Will be firmly fixed to the projecting outer shell portion 20.
The reinforcing frame member 42 improves the attachment strength to the side wall of the mold.

The projecting surface 21, which is the projecting end surface of the projecting outer shell portion 20, is formed flat, so that the form 2 is formed.
When 2 is applied and fixed to the projecting outer shell portion 20 with bolts, they are completely adhered, and leakage of mortar and the like can be reliably prevented when mortar is charged.

In a state in which the form 22 is fixed to the projecting outer shell 20 in a lid shape, as shown in FIG. 7, the projecting outer shell 2 is formed.
Since 0 itself is formed in a U shape and is provided with the mortar injection notch 18 in the upper portion, both sides are defined by the projecting outer shell portion 20 and the upper portion of the outer mortar mold 22a and the side wall 14 are formed.
With b, an elongated rectangular opening 25 is formed. The mortar for fixing the connecting portion is introduced through the opening 25. Then, a protruding space portion formed by the protruding outer portion 20 is formed inside thereof. Therefore, at this time, the mortar is introduced into a space including the mortar introduction space corresponding to the wall thickness of the side wall 14b formed by the opening 16 itself and the projecting space portion.

On the other hand, as shown in FIG. 4 and FIG.
On the inner surface side of b, a plate-shaped inner mortar form 22 having a plurality of mounting holes 40b formed at positions corresponding to the fixing positions of the nuts 32 embedded in the wall as the inner coupling receiving portion 24b.
b is abutted and fixed. That is, the opening 16 is applied so as to cover it from the inner surface side, and in that state, an L-shaped angle-shaped L-shaped reinforcing frame member having a bolt hole opened is abutted vertically on the outer edges of the opposing vertical sides. Then, the connecting bolt 34 is projected into the mounting hole 40b and screwed into the nut 32. In the present embodiment, the inner mortar mold 22b is formed of one substantially square plate material, but this may be formed by dividing it into, for example, an elongated rectangular plate material.

As described above, the nut 32 as the connection receiving portion 24 for fixing the mold is embedded and fixed in advance on the inner and outer walls of the side wall 14b. Therefore, the formwork 22a,
The outer and inner mortar molds 22a and 22b can be easily attached to the outer surface of the projecting outer shell 20 and the inner surface of the side wall simply by projecting the connecting bolt 34 into the mounting holes 40a and 40b of 22b and screwing them into the nut 32. Therefore, the working time can be shortened.

Moreover, when the form frame 22 is covered and connected and fixed to the projecting outer shell portion 20, a projecting space portion formed by the projecting outer shell portion is formed inside the projecting outer shell portion.
The projecting outer shell and the formwork create a bag-like space. Therefore, it is only necessary to add the mortar for connecting and fixing the pipes from above by an appropriate method, so that the mortar introducing operation can be performed quickly. Further, since the mortar portion to be introduced into the projecting space portion by the projecting outer shell portion 20 is added to the mortar introducing portion only to the opening portion 16, the mortar fixing portion is expanded and the mortar to be placed on the side wall 14b. As a result of being able to form a thick wall thickness, the connection of the pipeline to the manhole becomes extremely strong.

The above-mentioned connection receiving portion 24 may be any one that can easily fix the mold 22 to the side wall 14b of the manhole. Therefore, as in the embodiment, instead of the embedded nut 32, the bolt may be embedded in the wall in advance. In addition, it suffices to function as a connection receiving part when other forms are simply connected, such as a plug-in type insert member and its receiving member, a vertically slidable guide hole and a protruding shape to be fitted therein. It suffices as long as it constitutes a part and other arbitrary connection relations.

Next, the operation of the pipe connecting portion structure 10 for a manhole or the like according to this embodiment will be described. FIG.
In FIG. 9, a hollow box-shaped body 12 as a manhole body is buried in the ground, and a pipe 300 is formed in the direction of both end faces of the side walls 14b and 14b.
It shows the state where is arranged. When connecting the pipeline to the manhole, first, an operator enters the inside of the hollow box-shaped body 12 as shown in FIG. 8, and as shown in FIG. 4, the inner surface of the side wall 14b is an inner mortar type. While the mounting hole 40b of the frame 22b is aligned with the mounting position of the nut 32 of the inner coupling receiving portion 24b, it is applied to the inner surface of the side wall. Then, the reinforcing frame member 42 is brought into contact with both vertical sides on the upper surface side,
The connecting bolt 34 is fitted into the bolt hole, the mounting hole 40b, and screwed to be screwed into the inner connecting receiving portion 24b, so that the inner mortar form 22b is securely and firmly fixed to the inner surface of the side wall 14b. By this, the inner mortar formwork 2
2b completely closes the opening surface of the opening 16. Since the L-shaped reinforcing frame members 42, 42 are interposed, the mounting strength at the time of mounting the inner mortar frame 22b is significantly improved.

On the outer surface side of the side wall 14b, the operator projects the end surface side of the conduit 300 into the opening 16 outside the hollow box-shaped body 12 as shown in FIG. The outer mortar mold 22a is sandwiched by the fitting holes 38. Then, the end surface of the conduit 300 and the surface of the inner mortar form 22 are brought into close contact with each other so that there is no gap. At this time, as shown in FIG. 6, the end face side thereof is fixed in a bridging manner in the space where the mortar is placed. The position of the mounting hole 40a of the outer mortar mold 22a is changed to the projecting outer shell 2
The outer mortar mold 22a and the protruding surface 21 are brought into contact with each other in accordance with the position of the nut 32 embedded in the protruding surface 21 of 0.
Then, the connecting bolt 34 is inserted into the L-shaped reinforcing frame member 42 and the mounting hole 40a of the outer mortar frame 22a and screwed into the nut 32 of the outer connection receiving portion 24a. As a result, the outer mortar form 22a is connected and fixed to the projecting outer shell 20 by a simple operation of only bolting. At this time, in addition to the space defined by the opening 16, the projecting outer shell 20 and the mold 22 form a projecting space that is expanded or widened. Moreover, the upper surface of the projecting outer shell 20 has a notch 18 for introducing mortar, and therefore the form 22a and the side wall 1 are formed.
An elongated rectangular opening 25 formed by 4b is formed.

Next, mortar is introduced through the opening 25. Then, the mortar is cast in the space corresponding to the wall thickness formed by the opening 16 and the projecting space, and the mortar part 306 is formed. With this mortar portion 306, the end face side of the pipeline 300, which has been fixed in a bridging manner in the space in which the mortar is placed, is reliably fixed in the opening 16. Then, as shown in FIG. 9, the cylindrical extension tube 3 is closed at the upper part of the inlet / outlet port 26 of the hollow box-shaped body 12 with a lid 310.
08 is placed and a manhole is installed underground. After the mortar is hardened, the inner mortar mold is removed and the cable 302 is connected in the hollow area 30.

As described above, since the outer mortar frame 22a is securely attached to the side wall 14b by the screwing connection with the nut 32 as the connection receiving portion 24 by the mounting bolts 34, the outer mortar mold is subjected to the force and weight of the soil. There is no risk that the mold 22a will move, and the hollow box-shaped body 12 can be backfilled without any special curing period before mortar hardening. Then, the mold can be quickly and accurately formed on the inner and outer surface sides of the side wall 14b of the manhole installed in the ground without requiring the skill of an operator. Further, since the pipe 300 and the opening 16 can be connected very strongly by the mortar portion 306, the connection durability can be improved, and the mortar portion 306 may be damaged or damaged due to an earthquake or the years of use. It is possible to prevent water leakage from parts. Further, since the work of covering the soil with the mortar can be performed, it is possible to shorten the construction period and reduce the work cost.

The pipe connection structure 10 for the manhole and the like is a relatively large structure into which a worker can enter and exit, and this is, for example, a part of the human body such as the hand of the worker. It may be a medium-sized or small-sized manhole in which only the part can be inserted.

As a method of connecting the conduits to one manhole or the like for realizing the structure of the connecting portion of the manhole or the like as described above, the opening for connecting the conduit formed in the side wall of the hollow box-shaped body is surrounded. As described above, a protruding outer portion is formed on the outer surface side of the side wall by notching the upper side, and a connection receiving portion for fixing the mortar form is provided on the inner surface around the opening portion of the same side wall, and the protruding outer portion is projected. A connection receiving part for fixing the mortar formwork is also provided on the end face, the pipe is inserted into the opening and positioned, and the mortar formwork is fixed so that the mortar is inserted from the notch of the rib outer part into the inner space of the opening. The present invention is provided as a configuration including the steps of putting in, whereby a pipe line and an opening such as a manhole are connected easily, quickly, reliably, and with high precision. The present invention is not limited to the above-described embodiments, and any modification may be made without departing from the essence of the invention described in the claims. The number of conduits to be connected may be any number, and the form is not limited to a plate material, and may be any configuration as long as it has a surface that can come into close contact with the projecting outer shell.

[0048]

As described above, according to the connecting structure of the conduit to the manhole or the like of claim 1, the hollow box-shaped body of integral type or split type and the side wall of the hollow box-shaped body are formed. An opening for connecting a pipe line, and a projecting outer shell projecting outward from the side wall and surrounding the opening while forming a mortar injection notch in the upper part. An outer mortar mold is fixed to the outer surface of the outer shell in a lid shape, and an inner mortar mold covering the opening is provided on the inner surface of the side wall of the opening. On the inside and outside surface of the side wall, there is a connection receiving part for fixing these mortar forms to the side wall, so when connecting the pipe line laid in the soil and the manhole, No need to make mortar formwork by hand It is possible to produce a high mortar mold quickly. Since the connection receiving part is compactly gathered on the side wall of the hollow box-shaped body, it is possible to cover the soil immediately even after placing the mortar in the formwork, improving the work efficiency and improving the pipeline and the mold. It is possible to reduce the work time and work cost required for connecting the frames.
Since it is possible to construct a reliable connection between the pipeline and the manhole without requiring skill, it is possible to prevent water leakage into the manhole due to faulty construction, etc. Even in the case where the cable is arranged, it is possible to prevent deterioration of the cable due to the adhesion of water and prevent a cable fire or the like caused by a short circuit or the like. Since the connection strength between the pipeline and the manhole is strong in the event of an earthquake, it is possible to reduce the load on the cable arranged in the pipeline and protect the cable from damage and disconnection.

Further, according to the structure of the connecting portion of the conduit for the manhole or the like according to claim 2, the projecting outer portion is substantially U in a front view.
Since it is formed in a letter shape, it is possible to quickly and easily put the mortar into the mold, and for example, in the case of a large manhole, the mortar can be directly inserted into the U-shaped cutout from the concrete mixer or the like. Can be added, and the time required for adding mortar can be shortened.
Since the mortar charging notch can be formed with a simple structure, it is easy to manufacture and the product unit price can be reduced.

According to the third aspect of the present invention, in which the pipe line is connected to the manhole or the like, the connection receiving portion on the outer surface side of the side wall for fixing the outer mortar form is provided on the projecting end surface of the projecting outer shell. Therefore, it is possible to quickly and surely fix the mortar formwork to the outer side wall of the hollow box-shaped body in a short time without requiring the skill of an operator. After the mortar is cast, the wall surface formed in the opening can be made thicker, so that the connection strength between the manhole and the pipeline can be strengthened and the mortar cast area after the manhole is buried. It is possible to prevent water leakage. Therefore, work efficiency can be improved and work reliability can be obtained.

Further, according to the structure of the connecting portion of the conduit for the manhole or the like of claim 4, since the connection receiving portion is a nut or bolt member embedded in the inner and outer surfaces of the side wall,
The mortar formwork can be fixed to the side wall of the hollow box-shaped body with a simple structure, and even when fixing the mortar formwork, only the nuts or bolts are tightened. It can be performed. Further, this can shorten the working time required for fixing the mortar mold and improve the working efficiency. Since the mortar mold can be compactly fixed to the side wall of the hollow box-shaped body with nuts or bolts, it is possible to fill the manhole immediately after placing the mortar into the mold, shortening the work period required for the work. , The working cost can be reduced.

According to the pipe connecting structure for a manhole or the like of claim 5, the size of the opening on the outer surface side of the opening is smaller than the size of the opening on the inner surface side of the opening. Therefore, when the mortar placed in the opening hardens, the mortar and the opening can be joined securely, and the mortar can be prevented from separating and falling inside and outside the opening. The joint durability between the opening and the mortar can be improved and the work reliability can be obtained. Since the opening and the mortar can be joined quickly and strongly with a simple structure, work efficiency can be improved and work cost can be reduced.

According to the pipe connecting portion structure for a manhole or the like according to claim 6, the outer surface surrounded by the inner wall of the projecting outer shell and the projecting outer shell of the opening is more than the other side wall surface. Since a rough surface is also provided, the outer surface surrounded by the projecting outer shell and the contact surface of the mortar are strongly joined just by pouring the mortar into the formwork. If the manhole is buried in the ground, or if the manhole is buried near a facility or equipment that causes vibration or shock to the ground, such as a highway or railway, the mortar casting area and the opening will not be separated. Prevent as much as possible and prevent water leaks into the manhole. Therefore, it is possible to prevent the cable from short-circuiting due to water leakage or the like, and to prevent the cable fire due to these from occurring. In addition, since strong joining of the mortar and the opening can be performed quickly and surely without requiring skill, it is possible to improve working efficiency and reduce working cost.

According to the pipe connecting structure for a manhole or the like in claim 7, the inner mortar formwork on the side wall inner surface side is a plate material that completely closes the opening surface on the side wall inner surface side. In addition, since the outer mortar formwork on the outer surface side of the side wall is a plate material in which the fitting hole of the pipeline to be laid is evacuated, the pipeline and the opening before concrete placement can be temporarily and securely fixed. Therefore, it is possible to improve work efficiency and reduce work cost. As a result of the outer mortar formwork being arranged vertically in the ground, even if you do work to cover the soil before hardening the mortar, the formwork will not move due to the weight of the soil to cover, and you can quickly bury the manhole, This makes it possible to improve work efficiency and shorten the work period required for work. Also, since the plate material of the outer mortar form can be configured as a split type from approximately the center of the fitting hole of the pipe line, it is easy to process the escape hole of the pipe line, and moreover, the pipe line is sandwiched and opened by the divided plate materials. Since it becomes possible to fix the pipe to the opening, it is possible to temporarily and surely fix the pipe line to the opening without requiring a skilled technique. Therefore, it is possible to reduce the burden on the worker and improve the work efficiency.

The invention relating to the method of connecting a conduit to a manhole or the like in claim 8 is arranged on the outer surface side of the side wall of the hollow box so as to surround the opening for connecting the conduit. Forming a projecting outer shell notched upward, providing a connection receiving portion for fixing the mortar mold on the inner surface around the opening of the side wall, and fixing the mortar mold to the projecting end surface of the projecting outer shell. Since a connection receiving part for use is provided, the pipe line is inserted into the opening for positioning, the mortar form is fixed, and the mortar is introduced into the internal space of the opening from the notch of the rib outer portion, so that the skill It is possible to quickly and surely attach the frame for connecting the pipeline to the opening of the manhole without requiring. After mounting the form of the pipeline, mortar can be poured into the internal space of the opening from the notch in the outer ridge of the ridge, so it is possible to quickly and reliably connect the pipeline to the manhole. As the manhole can be filled immediately after the mortar is put in, the burden on the worker can be reduced, the work period required for the work can be shortened, and the work cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall perspective view illustrating a state in which a pipeline is connected and temporarily fixed by a frame to an opening of a pipeline connecting portion structure for a manhole or the like.

FIG. 2 is a front view of a structure for connecting a pipe to a manhole or the like.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a state explanatory view showing a state in which a periphery of an opening portion of a connecting portion structure of a pipeline to a manhole or the like is viewed from an inner surface side.

FIG. 5 is a state explanatory view seen from an oblique direction showing a state in which a pipeline is connected and temporarily fixed with a frame to an opening of a structure for connecting a pipeline to a manhole or the like.

FIG. 6 is an operation explanatory view showing a cross section of a state in which mortar is put between molds in which a duct is temporarily fixed.

FIG. 7 is a partially cutaway perspective view showing a state in which a duct is fixed to a mold.

FIG. 8 is an explanatory view showing in cross section a state in which a manhole having a structure for connecting a conduit to a manhole or the like is installed in the ground.

FIG. 9 is a state explanatory view showing, in a cross section, a usage state of a manhole provided with a structure for connecting a conduit to a manhole or the like in the ground.

10 is a cross-sectional view taken along the line BB of FIG.

FIG. 11 is a perspective explanatory view showing a state where the hollow box-shaped body of the manhole 11 is divided.

[Explanation of symbols]

 10 Pipe Line Connection Structure 12 Hollow Box-Shaped Body 14b Side Wall 16 Opening 18 Mortar Input Notch 20 Projected Outer Shell 22 Mortar Form 22a Outer Mortar Form 22b Inner Mortar Form 24 Connection Receiver 26 Outlet 30 Hollow Region 32 Nut 34 Connection bolt 36 Rough surface part 38 Fitting hole 300 Pipe line 302 Cable 306 Mortar part

Claims (8)

[Claims] 1. An integral or split type hollow box-shaped body, an opening for connecting a pipeline formed in a side wall of the hollow box-shaped body, and a mortar charging notch at an upper part protruding outward from the side wall. A projecting outer shell provided so as to surround the opening while being formed, and an outer mortar mold is fixed to the outer surface of the projecting outer shell in a lid shape, and the opening An inner mortar mold for covering the opening is provided on the inner surface of the side wall of the section, and a connection receiver for fixing these mortar molds to the side wall on the inner and outer surface sides of the side wall around the opening. A structure for connecting a pipe to a manhole, etc. 2. The structure for connecting a conduit to a manhole or the like according to claim 1, wherein the projecting outer shell is formed in a substantially U-shape in a front view. 3. The connection of a pipe line to a manhole or the like according to claim 1 or 2, wherein the connection receiving portion on the outer surface side of the side wall for fixing the outer mortar mold is provided on a projecting end surface of the projecting outer shell. Part structure. 4. The connection receiving portion is a nut or bolt member embedded in the inner and outer surfaces of the side wall.
A structure for connecting a conduit to a manhole or the like according to any one of 1. 5. The manhole or the like according to claim 1, wherein the size of the opening on the outer surface side of the opening is smaller than the size of the opening on the inner surface side of the opening. Pipe line connection structure. 6. A rough surface portion, which is rougher than other side wall surfaces, is provided on an inner surface of the projecting outer shell and an outer surface of the opening surrounded by the projecting outer shell. A structure for connecting a conduit to a manhole or the like according to any one of the above. 7. The inner mortar formwork on the side wall inner surface side is a plate material that completely closes the opening surface on the side wall inner surface side, and the outer mortar formwork on the side wall outer surface side is a pipe to be laid. 7. The structure for connecting a conduit to a manhole or the like according to claim 1, wherein the fitting hole of the passage is a plate material having a relief hole. 8. A projecting outer shell portion, which is cut out upward, is formed on the outer surface side of the side wall of the hollow box-shaped body so as to surround the opening for connecting the pipeline formed on the side wall, and the opening of the side wall is formed. A connection receiving part for fixing the mortar mold is provided on the inner surface around the part, and a connection receiving part for fixing the mortar form is also provided on the protruding end surface of the projecting outer shell, and the pipe line is inserted into the opening. A method of connecting a pipe line to a manhole or the like, which comprises positioning, fixing a mortar mold, and pouring mortar into a space inside an opening from a notch in the rib outer portion.