JP7313209B2 - Joint member for precast concrete wall-embedded pipe, joint structure for precast concrete wall-embedded pipe, and precast concrete wall installation method - Google Patents

Description

The present invention relates to a joint member for a precast concrete wall-embedded pipe connecting pipes buried inside a precast concrete wall, a joint structure for a precast concrete wall-embedded pipe, and a method for installing a precast concrete wall.

BACKGROUND ART Conventionally, it is known to bury a communication pipe or the like for housing a cable inside a concrete wall balustrade of an expressway or the like.

For example, as shown in Patent Document 1, there is known an embedded structure that can be suitably used as a transportation pipe embedded in concrete, particularly for utility transportation pipes such as water supply for ships that are embedded in the wharf of port facilities. In this embedded structure, a joint of a transport pipe is located at a concrete expansion joint, an expansion pipe is interposed in the joint of the transport pipe, an outer pipe covering the expandable pipe is arranged on one of the transport pipes, a sliding pipe that fits on the outer diameter of the outer pipe and is slidable in the axial direction of the outer pipe is arranged on the other transport pipe, and the transport pipe is buried in concrete.

In addition, as in Patent Document 2, when laying power/communication lines such as power cables, telephone lines, CATV cables, and cables for wired broadcasting while protecting them with cable protection tubes, it is known to connect the cable protection tubes using pipe joints of a specific shape in buffers such as bridges and elevated bridges of highways. This cable protection tube connection structure is composed of a corrugated tube having sockets for the cable protection tubes at both ends, and a cover member fixed to the cable protection tube and protecting the outer circumference of the corrugated tube. The cover member is formed of a pair of left and right cylindrical members, one end of which faces the outer periphery of the center of the corrugated tube at a required interval and the other end of which engages with the cable protection tube. The members are integrally connected by a connecting member having flexibility.

JP-A-62-147192 Japanese Patent No. 3834769

In conventional joint members for pipes buried in concrete walls, elastic pipes such as bellows pipes are used to absorb misalignment of connection openings. However, in the case of precast concrete, when connecting the respective buried pipes with adjacent concrete walls, the bellows structure makes it difficult to maintain the shape and the connection work becomes troublesome.

The present invention has been made in view of this point, and its object is to enable easy connection of the connection openings of the buried pipes even when the connection openings of the buried pipes are slightly misaligned when connecting the adjacent precast concrete walls.

In order to achieve the above object, in the present invention, a joint member of a precast concrete wall-embedded pipe is provided with an enlarged diameter portion to which a connection hose is connected.

Specifically, the first invention is directed to a joint member for a precast concrete wall-embedded pipe that connects a buried pipe buried inside a precast concrete wall.

The joint member for the precast concrete wall-embedded pipe is
a buried pipe connecting portion to which one end of the buried pipe is connected and which is connected to one end of the buried pipe;
an enlarged diameter portion provided on the other end side of the buried pipe connecting portion, arranged in a connection opening for the buried pipe on the side surface of the precast concrete wall, and having an outer diameter that gradually increases toward the side surface;
A water stop portion is provided on the inner surface between the buried pipe connection portion and the enlarged diameter portion, and is in pressure contact with the outer peripheral surface of the connection hose connected to the connection opening of another precast concrete wall adjacent to the precast concrete wall.

According to the above configuration, even if the positions of the connection openings of the pair of precast concrete walls are slightly displaced from each other, the connection hose that connects these connection openings can be inserted into the enlarged diameter portion, so that some misalignment is allowed. Since both ends of the connection hose are water-stopped by the water stop portions of the respective joint members, filler such as mortar does not flow into the joint member from the outer periphery of the connection hose after connection.

In the second invention, in the first invention,
The water stop portion is formed of a circumferentially continuous ridge having an inner diameter equal to or slightly smaller than the outer diameter of the connection hose between the buried pipe connection portion and the enlarged diameter portion.

According to the above configuration, the simple structure reliably prevents the infiltration of the filler and also securely fixes the connecting hose. Hereinafter, "inner diameter equal to or slightly smaller than the outer diameter of the connection hose" refers to an inner diameter that allows the connection hose to press against the filler to the extent that the filler does not flow between the connection hose and the connection hose is not easily pulled out when the connection hose is connected.

In a third invention, in the first invention,
The water stop portion has a flat inner surface having an inner diameter equal to or slightly smaller than the outer diameter of the connection hose between the buried pipe connection portion and the enlarged diameter portion.

According to the above configuration, since the abutting portion made of the flat inner surface is in surface contact with the outer circumference of the connection hose, the filler does not flow into the connection hose or the buried pipe when the filler is filled.

In a fourth invention, a joint structure using the joint member for a precast concrete wall-embedded pipe according to any one of the first to third inventions,
The expanded diameter portion of the joint member connected to the buried pipe opens into a joint portion between the side surface and the opposing side surface of the other precast concrete wall,
The outer peripheral surface of one end of the connection hose is connected to the water stop portion with pressure contact,
A filler is filled between the joint portion, the water stop portion, the outer peripheral surface of the connection hose, and the inner peripheral surface of the connection opening.

According to the above configuration, even if the positions of the connection openings of the pair of precast concrete walls are slightly displaced from each other, the connection hose that connects these connection openings can be inserted into the enlarged diameter portion, so that some misalignment is allowed. Since both ends of the connection hose are water-stopped by the water stop portions of the respective joint members, filler such as mortar does not flow into the joint member from the outer periphery of the connection hose after connection.

In a fifth invention, a joint member for a precast concrete wall-embedded pipe according to any one of the first to third inventions and the above-mentioned buried pipe are prepared,
connecting the joint members to both ends of the buried pipe,
disposing the buried pipe in the formwork so that the expanded diameter portion of the joint member connected to the buried pipe opens to a side surface facing the side surface of the other precast concrete wall;
placing concrete in the formwork to form a plurality of precast concrete walls;
arranging a pair of precast concrete walls such that the outer peripheral surfaces of both ends of the connection hoses that connect the connection openings of the buried pipes of the pair of precast concrete walls are connected to the water stop portions while being pressed against each other,
A filler is filled between the joint portion between the pair of precast concrete walls, the water stop portion, the outer peripheral surface of the connection hose, and the inner peripheral surface of the connection opening.

According to the above configuration, even if the positions of the connection openings of the pair of precast concrete walls are slightly displaced from each other, the connection hose that connects these connection openings can be inserted into the enlarged diameter portion, so that some misalignment is allowed. Since both ends of the connection hose are water-stopped by the water stop portions of the respective joint members, filler such as mortar does not flow into the joint member from the outer periphery of the connection hose after connection.

As described above, according to the present invention, even if the connecting openings of the buried pipes are slightly misaligned when connecting the adjacent precast concrete walls, the connecting openings can be easily connected.

1 is an enlarged sectional view showing a joint structure including a joint member for a precast concrete wall-embedded pipe according to Embodiment 1 of the present invention. FIG. 1 is a cross-sectional view showing a joint structure including a joint member for a precast concrete wall-embedded pipe according to an embodiment of the present invention; FIG. The manufacturing process of the precast concrete wall is shown, (a) shows the first formwork assembling process, (b) shows the reinforcing bar assembling process, and (c) shows the buried pipe installation process. The manufacturing process of the precast concrete wall is shown, (a) shows the second form assembly process, (b) shows the concrete placing process, and (c) shows the form releasing process. FIG. 2 is a cross-sectional view equivalent to FIG. 1 showing an enlarged joint structure including a joint member for a precast concrete wall-embedded pipe according to Embodiment 2 of the present invention. FIG. 2 is a cross-sectional view equivalent to FIG. 1 showing an enlarged joint structure including a joint member for a precast concrete wall-embedded pipe according to Embodiment 3 of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1)
1 and 2 show a joint structure 1 for precast concrete in-wall pipes including a joint member 10 for precast concrete in-wall pipes according to Embodiment 1 of the present invention. The joint member 10 for the precast concrete wall-embedded pipe is made of, for example, an integral resin molded product such as vinyl chloride or polyester, and has a buried pipe connection portion 11 into which one end 4a of the buried pipe 4 is inserted and connected to the one end 4a of the buried pipe 4. The buried pipe connecting portion 11 bulges so that the outer diameter increases slightly toward the end, but the outer diameter may be constant. Further, a stopper 11a is provided on the far side of the buried pipe connecting portion 11 and is composed of a continuous ridge or a plurality of projections provided at intervals.

On the other end side of the buried pipe connection portion 11, an enlarged diameter portion 12 is formed which is arranged in the connection opening 2b of the side surface 2a of the precast concrete wall 2 and whose outer diameter gradually increases toward the side surface 2a.

On the inner surface between the buried pipe connecting portion 11 and the enlarged diameter portion 12, there is provided a water stop portion 13 that contacts the outer peripheral surface of the connecting hose 6 connected to the connecting opening 2b of the other precast concrete wall 2 adjacent to the precast concrete wall 2 in a press-contact state.

The connection hose 6 is made of a highly durable resin hose containing a reinforcing material such as polyester thread, and has a certain degree of flexibility, but has a higher rigidity than the conventional bellows structure.

The water stop portion 13 of the present embodiment is formed of a ridge provided continuously in the circumferential direction on the inner peripheral surface on the far side of the enlarged diameter portion 12 . As shown in FIG. 1, the height of the water stop portion 13 itself does not rise so high from the surroundings, but the inner diameter of the water stop portion 13 is set to be the same as or slightly smaller than the outer diameter of the connection hose 6. The cross-sectional shape of the water stop portion 13 is not particularly limited.

The buried pipe 4 is made of, for example, a general-purpose rigid vinyl chloride wire pipe. In this embodiment, the object is a buried pipe 4 that is buried inside a railing of a highway or the like. For example, as shown in FIG. 4(c), the precast concrete wall 2 has a height of about 900 mm, a width (thickness) of about 250-450 mm, and a length of 2-3 m. Although details will be described later, as shown in FIG. 2, a large number of precast concrete walls 2 are manufactured in a state in which the buried pipes 4 and joint members 10 are embedded in the precast concrete walls 2, and the large number of precast concrete walls 2 are connected at the site.

In the joint structure 1 for a precast concrete wall-embedded pipe shown in FIGS. 1 and 2, the enlarged diameter portion 12 of the joint member 10 connected to the buried pipe 4 opens in the joint portion between the side surface 2a and the opposing side surface 2a of the other precast concrete wall 2, the outer peripheral surface of one end of the connecting hose 6 is connected to the water stop portion 13 in a state of pressure contact, and the filler 3 is filled between the joint portion and the water stop portion 13, the outer peripheral surface of the connection hose 6, and the inner peripheral surface of the connection opening 2b. It is

－Manufacturing procedure of precast concrete wall－
Next, the manufacturing procedure of the precast concrete wall 2 according to this embodiment will be described.

First, as a preparatory step, the joint member 10 and the buried pipe 4 are prepared, and the joint members 10 are connected to both ends of the buried pipe 4, respectively. The connection of the joint member 10 may be performed when the mold 50 is installed, as will be described later.

First, in the first formwork assembling process shown in FIG. 3(a), a formwork 50 made of wood or the like is arranged in the factory at portions corresponding to the bottom surface and back surface of the precast concrete wall 2 .

Next, in the reinforcing bar assembling process shown in FIG.

Next, in the buried pipe installation step shown in FIG. In the figure, one buried pipe 4 is arranged, but two or more pipes may be arranged side by side. Then, as shown enlarged in FIG. 1, the joint members 10 are connected to both ends of the buried pipe 4 . Specifically, the end (one end 4 a ) of the buried pipe 4 is inserted into the buried pipe connecting portion 11 . In the present embodiment, since the inner diameter of the buried pipe connecting portion 11 gradually increases slightly toward the end, insertion is easy. Also, the one end 4a abuts against the stopper 11a at the back of the buried pipe connecting portion 11, so that the buried pipe 4 and the joint member 10 are securely connected. The buried pipe 4 is arranged in the formwork 50 so that the enlarged diameter portion 12 of the joint member 10 connected to the buried pipe 4 opens to the side surface facing the side surface 2 a of the other precast concrete wall 2 .

Next, in the second formwork assembling step shown in FIG. 4(a), the formwork 50 on the front side is provided.

Next, in the concrete placing step shown in FIG.

Next, in the formwork releasing step shown in FIG. 4(c), the formwork 50 is removed and the precast concrete wall 2 is completed.

A large number of precast concrete walls 2 are manufactured and transported to a construction site such as a highway.

－How to install precast concrete walls－
A large number of precast concrete walls 2 manufactured by the above procedure are transported to the construction site, and are arranged one by one with an interval corresponding to the width of the joint. At this time, as shown in FIG. 1, the outer peripheral surfaces of both ends of the connection hoses 6 connecting the connection openings 2b of the buried pipes 4 of the pair of precast concrete walls 2 are pressed against the water cutoff portions 13 and connected. For example, if lubricating oil is applied to the connection hose 6 or the water stop portion 13 side and inserted, it is easy to insert, and there is no need to provide rubber or an O-ring for water stoppage, so connection is extremely easy. That is, for example, in a state in which the connection hose 6 is inserted until it abuts on the water stop portion 13 of the joint member 10 of one precast concrete wall 2, the other precast concrete wall 2 is brought closer, and the other end of the connection hose 6 is inserted while contacting the other expanded diameter portion 12, and connected to the one end 4a of the buried pipe 4 while being pressed against the water stop portion 13. At this time, even if the positions of the connection openings 2b of the pair of precast concrete walls 2 are slightly displaced from each other, when the connection hose 6 connecting these connection openings 2b is inserted into the enlarged diameter portion 12, the connection hose 6 is appropriately bent, so some displacement is allowed.

Next, in the filling step, a joint is formed by filling a filler 3 such as mortar between the joint, the waterproof portion 13, the outer peripheral surface of the connection hose 6, and the inner peripheral surface of the connection opening 2b. This filler 3 has almost no elasticity after curing, unlike those of Patent Documents 1 and 2.

Then, after the filler 3 has dried, an electric wire or the like is wired in the buried pipe 4 .

As described above, in the present embodiment, even if the positions of the pair of connection openings 2b are slightly displaced from each other, the connection hose 6 can be inserted into the enlarged diameter portion 12, so that some displacement is allowed. Since both ends of the connection hose 6 are stopped by the water stop portions 13 of the respective joint members 10, the filler 3 such as mortar does not flow into the joint member 10 from the outer periphery of the connection hose 6 after connection.

Therefore, according to the joint member 10 for precast concrete wall-embedded pipes according to the present embodiment, even if the connection openings 2b of the buried pipes 4 are slightly misaligned when connecting the adjacent precast concrete walls 2, the connection openings 2b can be easily connected.

(Embodiment 2)
FIG. 5 shows a precast concrete in-wall pipe joint structure 101 including a precast concrete in-wall pipe joint member 110 according to Embodiment 2 of the present invention. In each of the following embodiments, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Unlike the first embodiment, the water stop portion 113 of this embodiment is not provided with a ridge, but the inner surface of the joint member 110 itself is formed of a flat surface that is the same as or slightly smaller than the outer diameter of the connection hose 6.

For this reason, the water stop portion 113 can be easily formed, and the connection hose 6 can be easily connected to the water stop portion 113 in a press-contact state by applying lubricating oil to the water stop portion 113 or the connection hose 6 side.

Further, a diameter-reduced portion 114 having an inner diameter smaller than that of the water stop portion 113 is formed at the back of the water stop portion 113, whereby the connection hose 6 is positioned.

Even in this embodiment, even if the positions of the connection openings 2b of the pair of precast concrete walls 2 are slightly displaced from each other, the connection hose 6 that connects these connection openings 2b can be inserted into the enlarged diameter portion 112, so some misalignment is allowed. Since both ends of the connection hose 6 are stopped by the water stop portions 113 of the respective joint members 110, the filler 3 such as mortar does not flow into the joint member 110 from the outer periphery of the connection hose 6 after connection.

(Embodiment 3)
FIG. 6 shows a precast concrete in-wall pipe joint structure 201 including a precast concrete in-wall pipe joint member 210 according to Embodiment 3 of the present invention.

The water stop portion 213 of the present embodiment is formed of a ridge that protrudes continuously from the inner surface between the buried pipe connection portion 11 and the enlarged diameter portion 12 . The inner diameter of the water stop part 213 is set smaller than the outer diameter of the connection hose 6, and the water stop part 213 may be configured to have appropriate flexibility so that the water stop part 213 bends and deforms toward the back when the connection hose 6 is inserted. The cross-sectional shape of the water stop portion 213 is also not particularly limited.

With this structure, the filler 3 can be reliably prevented from entering, and the connection hose 6 can be securely fixed with a simple structure.

Also in this embodiment, even if the positions of the connection openings 2b of the pair of precast concrete walls 2 are slightly displaced from each other, the connection hose 6 that connects these connection openings 2b can be inserted into the enlarged diameter portion 212, so some misalignment is allowed. Since both ends of the connection hose 6 are water-stopped by the water stop portions 213 of the respective joint members 210, the filler 3 such as mortar does not flow into the joint member 210 from the outer periphery of the connection hose 6 after connection.

The above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications, or uses.

1 Joint structure for precast concrete wall-embedded pipes
2 Precast concrete wall
2a side
2b Connection opening
3 filler (joint)
4 buried pipe
4a one end
6 Connection hose
10 Joint member for precast concrete wall-embedded pipe
11 Buried pipe connection
11a Stopper
12 diameter expansion part
13 Water stop part
50 Formwork
51 Reinforcing bar 101 Joint structure of precast concrete wall-embedded pipe 110 Joint member of precast concrete wall-burying pipe 112 Expanded diameter portion 113 Water stop portion 114 Diameter reduction portion 201 Joint structure of precast concrete wall-buried pipe 210 Joint member of precast concrete wall-buried pipe 212 Expanded diameter portion 213 Water stop portion

Claims (3)

A joint member for a precast concrete wall-embedded pipe that connects a buried pipe buried inside a precast concrete wall,
a buried pipe connecting portion to which one end of the buried pipe is connected and which is connected to one end of the buried pipe;
an enlarged diameter portion provided on the other end side of the buried pipe connecting portion, arranged in a connection opening for the buried pipe on the side surface of the precast concrete wall, and having an outer diameter that gradually increases toward the side surface;
a water stop portion provided on the inner surface between the buried pipe connection portion and the enlarged diameter portion and abutting in a state of pressure contact with the outer peripheral surface of the connection hose connected to the connection opening of another precast concrete wall adjacent to the precast concrete wall;
The water stop portion integrally protrudes radially inward from the inner surface between the buried pipe connection portion and the enlarged diameter portion, and is composed of a circumferentially continuous ridge having an inner diameter equal to or slightly smaller than the outer diameter of the connecting hose.
A joint member for a precast concrete wall-embedded pipe, characterized by: A joint structure using the joint member for a precast concrete wall-embedded pipe according to claim 1 ,
The expanded diameter portion of the joint member connected to the buried pipe opens into a joint portion between the side surface and the opposing side surface of the other precast concrete wall,
The outer peripheral surface of one end of the connection hose is connected in pressure contact with a water stop portion formed of a circumferentially continuous ridge projecting integrally radially inward from the inner surface between the buried pipe connection portion and the enlarged diameter portion of the joint member,
A joint structure for a pipe buried in a precast concrete wall, wherein a filler is filled between the joint portion, the water stop portion, the outer peripheral surface of the connection hose, and the inner peripheral surface of the connection opening. Preparing the joint member for the precast concrete wall-embedded pipe according to claim 1 and the buried pipe,
connecting the joint members to both ends of the buried pipe,
disposing the buried pipe in the formwork so that the expanded diameter portion of the joint member connected to the buried pipe opens to a side surface facing the side surface of the other precast concrete wall;
placing concrete in the formwork to form a plurality of precast concrete walls;
a pair of precast concrete walls are arranged so that outer peripheral surfaces of both ends of the connection hose connecting openings for connection of the buried pipes of the pair of precast concrete walls are connected in a state of being press-contacted to water stop portions formed of ridges that are integrally projected radially inward from an inner surface between the buried pipe connection portion and the enlarged diameter portion of the joint member and are continuous in the circumferential direction;
A method for installing a precast concrete wall, characterized by filling a filler between the joint portion between the pair of precast concrete walls, the water stop portion, the outer peripheral surface of the connection hose, and the inner peripheral surface of the connection opening.

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