JP4210606B2 - Concrete pipe and assembling method thereof - Google Patents

Description

The present invention relates to an assembly-type large-diameter concrete pipe, and more particularly to a high-strength concrete pipe with improved water-stopping and assembling properties of a connecting portion and an assembling method thereof.

A concrete pipe made of reinforced concrete has male and female joints formed at both ends thereof, and the joints of the concrete pipes are joined to each other.
The water stoppage of concrete pipes with a small diameter (less than 3 m) is mainly dealt with by installing an annular seal material on either or both joints, and the strength of the joints against compression and bending is This is dealt with by using a composite structure of steel and concrete with a seamless steel pipe called collar on the outer surface of the female joint.

The conventional concrete pipe has the following problems to be solved.
<1> As disclosed in Japanese Patent Laid-Open No. 4-64697, two advanced mine pipes are connected to each other by a pipe support in the form of a roof, and an underground platform and an underground shopping center are excavated from the ground below the support. In the technology of constructing underground structures with large sections such as underground liquid storage facilities, it is theoretically possible to adopt a propulsion method using concrete pipes for the construction of advanced mines.
In reality, however, the diameter of a concrete pipe that can be transported by land due to road conditions and on-vehicle dimensions is limited to about 3 m. If the diameter is larger than this, transportation to the site becomes impossible or the burden of high transportation costs is high. Forced.
A method of manufacturing a large-diameter concrete pipe on-site to solve the transport problem is also conceivable. However, it is difficult to secure a manufacturing place and sufficient quality control cannot be performed, so there remains anxiety in terms of strength.

<2> the slit 92 provided in the concrete pipe body 91 as shown in FIG. 13, fit the fit can lid 93 to the slit 92, concrete pipe 90 of the split structures attached with bolts JP 200 2 - This is disclosed in Japanese Patent No. 256792.
In this concrete pipe 90, stepped side plates 91 a and 93 a each having a substantially crank-shaped cross section provided on both connection surfaces (surfaces parallel to the axial direction) of the concrete pipe main body 91 and the lid 93 are fitted. The sealant 94 is filled in a substantially crank-shaped gap formed in the connecting portion to ensure water stopping.

In this concrete pipe 90, not only has the shape and structure of the connecting portion complicated and the processing cost increases, but also the water stop performance of the connecting portion is low, it is attached to the outer peripheral surface of the female joint 95. Since the steel pipes 95a and 95b are divided by the concrete pipe main body 91 and the lid 93, there are many problems that the function as a composite structure is significantly reduced.
Even if the steel pipes 95a and 95b are welded to each other, labor is required for the welding work, and there are always problems of insufficient strength due to poor welding, anxiety of sealing performance, and concrete explosion due to high temperature during welding.

This invention is made | formed in view of the above point, The place made into the objective is to provide the following any one concrete pipe and its assembly method.
(1) Improving the connectivity between the outer shells and the water stoppage.
(2) Applicable to large diameter concrete pipes.
(3) The concrete pipe is optimal for the propulsion method.

The present invention is a cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other at both ends, comprising a plurality of divided arc bodies divided along the axial direction, the divided arc body there and concrete building frame body arcuate, an outer peripheral surface of the concrete building frame body, becomes more an outer shell covering over the formation range of at least the female joint, said plurality of divided arc assembled into a tubular shape it is characterized in that in the continuous Yuitome water plate placed across between the outer shell of the coupling between the outer shell.
Furthermore, the present invention provides a tubular concrete pipe formed with a male joint and a female joint that can be fitted to each other at both ends, and an overhang portion that is integrally formed by projecting one end portion of the concrete frame in the axial direction; A female joint is formed by at least the outer shell covering the outer peripheral surface of the overhanging portion, and the range covering the outer peripheral surface of the overhanging portion of the total axial length of the outer shell is between the outer shells. It connects with the connection water stop board installed ranging.
Furthermore, the present invention provides a cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other at both ends, and a female joint is formed by extending only the outer shell in the axial direction from the end of the concrete housing body. It forms, and it connects with the connection water stop board installed ranging over between the outer shells in the range which protruded from the housing of the division | segmentation circular arc body among the axial total length of this outer shell, It is characterized by the above-mentioned.
Furthermore, the present invention provides a cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other at both ends, and a female joint is formed by extending only the outer shell in the axial direction from the end of the concrete housing body. formed, between the outer shell of the plurality of divided arc assembled into a cylindrical shape, among the total axial length of the outer shell, coupling stop of the outer range of skeleton of the split arc was placed astride between the outer shell While connecting with a water plate, the range which protruded from the housing | casing of the division | segmentation circular arc body was fixed by the adhering part.
Further, the present invention is a method of assembling a cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other by a plurality of divided arc bodies divided along the axial direction, The divided arc body is composed of an arc-shaped concrete housing body and an outer peripheral surface of the concrete housing body that covers at least the formation range of the female joint, and axially covers one end of the concrete housing. And forming a female joint with a projecting portion that is integrally formed by projecting to the outer shell and an outer shell that covers at least the outer peripheral surface of the projecting portion, and assembling the plurality of divided arc bodies into a cylindrical shape, Of the total length in the axial direction, a connecting water stop plate is installed across the outer shell covering the outer peripheral surface of the overhanging portion, and the connection water stop plate is bolted and / or bonded between the outer shells. Also characterized by being connected It is.
Further, the present invention is a method of assembling a cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other by a plurality of divided arc bodies divided along the axial direction, The divided arc body is composed of an arc-shaped concrete body and an outer shell that covers at least the outer surface of the concrete body and covers the formation range of the female joint. Overhanging only the shell in the axial direction to form a female joint , assembling the plurality of divided arc bodies into a cylindrical shape, between the outer shells of the plurality of divided arc bodies, of the total axial length of the outer shell, The outer wall of the split arcuate body is connected by connecting a water blocking plate across the outer shell, and the female joint protruding from the split arcuate body is fixed by the fixing part. It is characterized by connecting It is intended.

The present invention can obtain any one of the following effects.
<1> Since a plurality of divided arc plates are assembled into a cylindrical shape and connected to each other between the outer shell and the outer shell, the connection water stop plate can be integrally connected between the outer shells by bolting and / or bonding. Although it is a split-type concrete pipe, it is possible to obtain a concrete pipe having a composite structure that is excellent in terms of strength.
<2> The connection water stop plate not only functions as a connection material, but the entire back surface of the connection water stop plate comes into contact with the outer shell, so that the water stop performance between the outer shells is remarkably improved.
<3> Since the outer shells are connected by a connection water stop plate, it is free from concerns about poor welding and concrete explosion.
<4> When connecting the outer shells of a plurality of divided arcuate bodies, the combined end face of the divided arcuate body can be used as a pressing surface by connecting the combined water blocking plate and the fixing portion in combination, thereby providing a housing for the divided arcuate body. While being able to reduce the thickness, it is possible to secure a high water-stopping property and a strong connection strength of the connection part.
<5> Since it can be transported in the form of a plurality of divided arcs and assembled into a cylinder at the site, etc., it can be transported to the site even if the concrete pipe has a large diameter, and is transportable, easy to handle and economical. It is possible to obtain an integrated concrete pipe excellent in
<6> The concrete pipe can be applied not only to large-diameter propulsion work but also to a concrete pipe for ordinary burial use, and is versatile.

  Embodiments of the present invention will be described below with reference to the drawings.

<1> Overall Configuration of Concrete Pipe FIG. 1 shows the entire concrete pipe 10 and FIG. 2 shows a side view thereof.
The concrete pipe 10 is composed of a plurality of divided arcuate bodies 10a and 10b obtained by dividing a cylindrical body along the longitudinal direction.
The number of divisions of the concrete pipe 10 is not limited to the two sets shown in the figure, and may be three or more. In short, the concrete pipe 10 may have a size capable of transporting the divided arcuate bodies 10a and 10b after division. Any suitable number of divisions may be used depending on the aperture.

A male joint 20 and a female joint 30 that can be fitted to each other are formed at both ends of the concrete pipe 10.
Explaining the illustrated joint, the male joint 20 formed at the right end of the concrete pipe 10 is constituted by a concrete body 11 having a smaller outer diameter than the concrete pipe 10, and the female joint 30 at the left end of the concrete pipe 10. Is an overhanging portion 12 formed so as to have an inner diameter larger than the inner diameter of the concrete pipe 10 main body, protruding in the axial direction from the concrete housing main body, and an outer shell 13 sheathed on the concrete housing main body of the overhanging portion 12. It is comprised by.
The axial length of the outer shell 13 is set to be longer than the protruding length of the overhanging portion 12, from the inside of the overhanging portion 12 (on the male joint 20 side) to the end of the overhanging portion 12. It is put on the outer section.

One or a plurality of sealing materials 14 are attached to the outer peripheral surface of the male joint 20 (see FIG. 6), and a good water stoppage between the joints 20 and 30 is ensured when fitted to another female joint 30. It has come to be able to do.
The joint is not limited to the illustrated form, and it is needless to say that various known joint structures can be applied.

A plurality of connecting boxes 18 are formed on the side end face 15 parallel to the axial direction of both divided arcuate bodies 10a and 10b, and a pair of these connecting boxes 18 and 18 facing each other is fastened with, for example, a high tension bolt. Or it connects using well-known joint tools, such as a cotter joint (wedge type joint).
The present invention is not an improvement in the connection between the two divided arc bodies 10a and 10b, but an improvement in the connection of the female joint 30 as will be described later.

<2> Divided Arc Body Each of the divided arc bodies 10a and 10b has the same shape and the same structure, and the one divided arc body 10a will be described below.
As shown in FIG. 3, the divided arc member 10a has an arc shape in cross section, and various reinforcing materials such as reinforcing bars are embedded therein. The material is concrete, but in addition to concrete, resin concrete, hard resin, and sintered products of various industrial wastes may be used, and these materials are formed into a predetermined shape using vibration or centrifugal force. .

  The outer shell 13 of the divided arc body 10a is firmly joined by projecting a gibber or the same functional member on the back surface of the outer shell 13 in order to increase the adhesion strength with the concrete housing body, and the outer peripheral surface thereof is the housing of the divided arc body 10a. It is formed as a smooth surface with no step from the outer peripheral surface.

  Concave portions 16, 16 are formed at both ends in the circumferential direction of the outer shell 13 near the side end surface 15 of the divided arc member 10 a over a certain width from the side end surface 15 of the divided arc member 10 a. A plurality of bolt holes 17 are formed by embedding inserts or the like on the exposed surface.

<3> Connection water stop plate In the present invention, in each of the divided arcuate bodies 10a and 10b abutted, the connection water stop plate 40 is disposed between the outer shells 13 and 13 so as to be connected to the outer shells 13 and 13. And high water-stop properties can be imparted. That is, in the present invention, the abutted outer shells 13 and 13 are connected without using welding.
As shown in FIG. 4, the connection water stop plate 40 is a curved plate body that can be accommodated across the recesses 16, 16, and is formed of the same steel plate as the outer shell 13. A plurality of through holes 41 are formed at corresponding positions.

<4> Assembly Method Next, a method for assembling the concrete pipe 10 according to the present invention will be described.

The plurality of divided arcuate bodies 10a and 10b described above are carried into the site.
Conventionally, concrete pipes having a diameter of 3 m or more have been difficult to transport by land, but since the present invention is in the form of divided arc bodies 10a and 10b obtained by dividing the concrete pipe 10 into a plurality of diameters, the diameter of the pipe is 3 m or more. Even if it exists, it can be easily carried into the site.
Moreover, each division | segmentation circular arc body 10a, 10b to carry in can be manufactured in advance with high quality in the factory where the manufacturing environment is prepared.

When arriving at the laying site, the side end surfaces 15 of both divided arcuate bodies 10a and 10b are brought into contact with each other and assembled into a cylindrical shape.
The two arcuate bodies 10a and 10b are fastened to each other through high tension bolts or cotter joints.

  Next, as shown in FIG. 4, after the connection water stop plate 40 is accommodated and installed between the recesses 16, 16 formed by abutting the adjacent outer shells 13, 13, a plurality of mounting bolts 43 are provided as shown in FIG. 5. And the connection water stop plate 40 is fixed integrally.

Since the connection water stop plate 40 is installed across the recesses 16 and 16 of the outer shells 13 and 13, the outer shells 13 and 13 can be integrated to provide continuity without welding.
Further, by forming the thickness of the connection water stop plate 40 and the recesses 16 and 16 of the divided arc members 10a and 10b to be substantially equal, the protrusion of the connection water stop plate 40 is avoided and the outer shells 13 and 13 and the divided arcs are separated. It can be made to correspond with the outer peripheral surface of the bodies 10a and 10b.
Furthermore, as shown in FIG. 5, the cross-sectional shape of the joint portion between the connection water stop plate 40 and both divided arcuate bodies 10a and 10b is substantially T-shaped (substantially crank shape), so that a wide sealing area can be secured. Good water stoppage can be secured at the joint.
Furthermore, if a film having a sealing function such as an epoxy resin is formed in advance over the entire back surface of the connection water stop plate 40, the entire side end surface 15 of the divided circular arc bodies 10a and 10b, or the formation range of the female joint. Further, the water stoppage of the joint portion is further improved.

  The cylindrical concrete pipe 10 is manufactured by performing the assembling work described above, and is suspended and buried in, for example, a cut groove or used for propulsion.

FIG. 6 is a longitudinal sectional view of a fitting portion in which the male joint 20 and the female joint 30 of the concrete pipes 10 and 10 are fitted to each other.
Reference numeral 50 is a cushioning material interposed between the end faces of the concrete pipes 10 and 10 and may be omitted.
As shown in FIG. 5, the female joint 30 includes an overhanging portion 12 that is integrally formed by protruding in the axial direction from the concrete main body, an outer shell 13, and a connected water stop plate 40 that connects the outer shells 13, 13. Therefore, a compressive force (propulsive force) acting in the axial direction acts on the concrete pipe 10, and bending acts on the overhanging portion 12 of the concrete body by rolling or pitching. However, crushing and bending failure of the concrete body can be avoided, and the strength of the joint portion of the concrete pipe 10 can be increased.

<5> Other forms 1
Other forms will be described below. In the description, the same parts as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the above-described embodiment, the case where the female joint 30 is formed by the overhanging portion 12 and the outer shell 13 formed by projecting the concrete casing main body in the axial direction at one end of the concrete pipe 10 is shown in FIG. Thus, the overhang portion 12 may be eliminated, and the female joint 30 may be formed by overhanging only the outer shell 13 from the end portion of the concrete body.
Also in the case of this example, it is the same as that of the previous form to connect between the recessed parts 16 and 16 of the outer shells 13 and 13 attached together by the connection water stop plate 40.

<6> Other form 2
Although FIG. 7 shows the case where the connection water stop plate 40 is attached over the entire axial length of the outer shells 13, 13, as shown in FIGS. 8 to 12, the axial total length of the outer shells 13, 13 is shown. Of these, the exterior range of the concrete body of the divided arc bodies 10a and 10b is connected by the connection water blocking plate 40, and the range protruding from the concrete body is formed by the fixing portions 44 formed by welding, bonding, etc. , 13 may be integrated to provide continuity.
That is, the place where both the outer shells 13 and 13 are adjacent is integrated by the connection water stop plate 40 and the fixing portion 44.
In assembling, it is preferable to form the fixing portion 44 after the connection water stop plate 40 is attached in advance.
Further, the adhering portion 44 is not intermittent but formed with continuity.

In the case of this example, as shown in FIG. 9, the recessed parts 16 and 16 which can be installed across the connection water stop board 40 in the both ends of the outer shell 13 near the side end surface 15 of the division | segmentation circular arc bodies 10a and 10b. And a plurality of bolt holes 17 are formed by embedding inserts or the like in the exposed surfaces of the recesses 16.
Each recess 16 may be formed by drawing a steel plate having a uniform thickness, or by cutting a steel plate having a uniform thickness to form a stepped surface on the outer peripheral surface thereof as the recess 16.

  In addition, the concrete frame has a weak point that explodes due to the high temperature during welding. Therefore, when the fixing portion 44 is formed by welding, a position slightly exceeding the end faces of the divided arc bodies 10a and 10b so that welding can be performed from a position 5 mm to 10 mm away from the concrete frame of the divided arc bodies 10a and 10b. It is desirable to form both concave parts 16 and 16 long in the axial direction.

In this example, the following plural advantages can be obtained in an integrated manner.
1. As shown in FIG. 12, since the entire end face of the divided arc bodies 10a and 10b capable of transmitting a propulsive force can be used as a pressing surface, the casing thickness of the divided arc bodies 10a and 10b is designed to be thinner than the structure of FIG. be able to.
2. The range connected by the connection water stop plate 40 is good for the joint because the cross-sectional shape of the joint between the outer shells 13 and 13 is substantially T-shaped (substantially crank), and a wide sealing area can be secured. As a result, it is possible to ensure a high water-tightness and connection strength, and also to ensure a high sealing performance and connection strength in the range connected by the fixing portion 44.
3. Since the metal outer shells 13 and 13 do not allow water to permeate, the sealing performance by the rubber ring is improved, and the metal outer shells 13 and 13 have a large elongation, so even if an unreasonable force such as rolling pitching is applied. Followability is improved.

<7> Other form 3
Further, the case where the outer shell 13 is covered over the formation range of the female joint 30 of each divided arc member 10a, 10b constituting the concrete pipe 10 has been described above, but the outer shell 13 is divided into each divided arc member 10a, 10b. It may be formed so as to cover the entire outer periphery.
When covering the entire outer circumference of each divided arc member 10a, 10b with the outer shell 13, the recesses 16, 16 formed at both ends in the circumferential direction of the outer shell 13 are along the axial direction of each divided arc member 10a, 10b. It is necessary to form continuously.
The connection water stop plate 40 is also of a horizontally long shape according to the dimensions of the recesses 16 and 16 described above.

<8> Other form 4
Moreover, as a fixing means of the connection water stop board 40 arrange | positioned between the adjacent outer shells 13 and 13, you may apply | coat and adhere | attach an adhesive agent.
Desirably, a bolt and an adhesive may be used in combination.
As the adhesive, a known adhesive having excellent weather resistance and high adhesion can be used.

The assembly perspective view of the concrete pipe concerning the present invention. The side view of the concrete pipe which completed the assembly. Sectional drawing of III-III in FIG. Explanatory drawing just before assembling a connection water stop board between the outer shells of a division | segmentation circular arc body. Explanatory drawing after attaching a connection water stop board between the outer shells of a division | segmentation circular arc body. The longitudinal cross-sectional view of the fitting part of the concrete pipe fitted through the joint. The longitudinal cross-sectional view of the fitting part of the concrete pipe for demonstrating another fitting form. The side view of the concrete pipe for demonstrating the other form which joins an outer shell. The exploded view of the division | segmentation circular arc body before joining an outer shell. The longitudinal cross-sectional view of XX in FIG. The longitudinal cross-sectional view of XI-XI in FIG. The longitudinal cross-sectional view of the fitting part of the concrete pipe for demonstrating a fitting form. It is explanatory drawing of the concrete pipe which this invention presupposes, (a) is a perspective view of a concrete pipe, (b) is explanatory drawing when fitting a cover body in a concrete pipe main body, (c) is a cover body and a concrete pipe The expanded sectional view of the junction part of a main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Concrete pipe 10a, 10b Divided circular arc body 11 Concrete frame main body 12 Overhang | projection parts 13 and 13 Outer shell 20 Male joint 30 Female joint 40 Connection water stop plate 43 Mounting bolt

Claims (9)

A cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other at both ends,
It consists of a plurality of divided arcs divided along the axial direction,
The divided arc body is an arc-shaped concrete housing body,
Said concrete building frame a peripheral surface of the main body, it becomes more an outer shell covering over the formation range of at least the female joint,
Characterized in that for connecting the said shell in communication Yuitome water plate placed across between the outer shell of the plurality of divided arc assembled into a cylindrical shape,
Concrete pipe. Oite in claim 1, is projected to one end of the concrete skeleton axially constitutes a projecting portion formed integrally with the female joint by a shell that covers the outer peripheral surface of at least the projecting portion In the axial length of the outer shell, the outer shell is connected with a connection water stop plate installed across the outer shell over the range covering the outer peripheral surface of the overhanging portion . Concrete pipe. The concrete pipe according to claim 2, wherein a coating film having a sealing function is formed on at least a side end face of the divided arcuate body in a range where a female joint is formed. In claim 1, a female joint is formed by projecting only the outer shell from the end of the concrete housing body in the axial direction, and a range of the total length in the axial direction of the outer shell projecting from the housing of the divided arc member is defined. A concrete pipe characterized in that it is connected with a connection water stop plate installed between outer shells. Oite to claim 1, from the end of the concrete building frame body protrudes only outer shell in the axial direction to form a female joint, between the outer shell of the plurality of divided arc assembled into a tubular shape, said outer shell Of the total length in the axial direction, the external arc range of the split arc member is connected by a connection water stop plate installed across the outer shells, and the range protruding from the split arc member case is fixed by the fixing portion. A concrete pipe characterized by that. The concrete pipe according to any one of claims 1 to 5, wherein the outer shell is covered over the entire outer periphery of the concrete main body. In any one of claims 1 to 5, characterized in that the connecting waterstop plate placed across between the outer shell of a plurality of divided arc is fixed by bolting and / or adhesive, concrete pipe. A method of assembling a cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other by a plurality of divided arcs divided along the axial direction,
The divided arc body is an arc-shaped concrete housing body,
It is an outer peripheral surface of the concrete housing body, and comprises an outer shell covering at least the formation range of the female joint ,
A female joint is constituted by an overhang portion integrally formed by projecting one end portion of the concrete casing in the axial direction, and an outer shell covering at least the outer peripheral surface of the overhang portion,
Assembling the plurality of divided arc bodies into a cylindrical shape,
Of the total length in the axial direction of the outer shell, a connection water stop plate is installed across the outer shell over the range covering the outer peripheral surface of the overhanging portion ,
Characterized in that the outer water shell is connected by bolting and / or bonding the connection water stop plate,
How to assemble concrete pipes. A method of assembling a cylindrical concrete pipe formed with a male joint and a female joint that can be fitted to each other by a plurality of divided arcs divided along the axial direction,
The divided arc body is an arc-shaped concrete housing body,
It is an outer peripheral surface of the concrete housing body, and comprises an outer shell covering at least the formation range of the female joint ,
A female joint is formed by extending only the outer shell in the axial direction from the end of the concrete body.
Assembling the plurality of divided arc bodies into a cylindrical shape,
Between the outer shells of the plurality of divided arc bodies, and by connecting a waterstop between the outer shells of the outer circumference of the divided arc body, out of the total axial length of the outer shell,
The formation range of the female joint that protrudes from the housing of the divided arc body is fixed by the fixing portion, and the outer shell is connected,
How to assemble concrete pipes.

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