JPH11264177A - Two-divided flexible closed conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To have flexibility in a two-divided closed conduit by connecting an upper member and a lower member two-divided in the height direction by having a margin on a slip-off prevention fitting so as not to obstruct the expansion and contraction of a water stop elastic body. SOLUTION: After a clearance is opened and embedded in the axial direction of a water sealing resilient body on a face orthogonal to an axis two-dividing the length direction of lower U-shaped members 1a, 1b and upper U-shaped members 2a, 2b, the upper and lower U-shaped members are overlapped on a square shape. In order to form a pipe passage, bar steel is inserted in a hole 9 to be tightened on a working notch 10 by nuts. After pipe passage formation, the notch 10 is backfilled with non-shrinkage mortar or the like. The axial relative displacement of a normal adjacent closed conduit pipe is absorbed by the expansion and contraction of a water stop elastic body 3, since a slip-off prevention fitting 12 constrains even instantly acting large relative displacement, the pipe passage constituted by a series of the continuous closed conduit is not broken, and its function can be secured. Thus, the design of an earthquake resistant pipe passage can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a culvert which is connected to each other in the axial direction and is laid in the ground as a waterway, an underground passage, a common ditch, or the like to form a pipeline. The present invention relates to a flexible culvert.

[0002]

2. Description of the Related Art Conventionally, a flexible water-stopping elastic body is buried between two unit culverts in the axial direction to absorb the relative displacement of each culvert.

FIG. 9 (a) is a side sectional view of a conventional flexible culvert, and FIG. 9 (b) is a C sectional view.

[0004] Here, reference numeral 3 denotes a water-stopping elastic body buried around four circumferences.

[0005]

When a culvert becomes large,
The culvert is not a unit because it becomes difficult to handle and transport,
It is divided into two parts and assembled on site.

In a conventional structure in which a waterproof elastic body is inserted between two unit culverts in the axial direction and a steel strip is wound around the outer peripheral surface to provide flexibility, the waterproof elastic body is Both edges had to be buried in each unit culvert as one.

This method cannot be applied to a two-part culvert.

For the above reasons, there has been a demand for a technique of forming a large underdrain by giving flexibility to the divided underdrain.

[0009]

In a culvert, a water-stopping elastic body is buried in a surface perpendicular to an axis, which divides a length direction into two in a longitudinal direction of an upper member and a lower member divided into two in a height direction, The upper member and the lower member are combined to form a closed cross section, and the upper member and the lower member, and a means for connecting the water stopping elastic body of the upper member and the water stopping elastic body of the lower member are provided. The gist of the present invention is that the flexible culvert is divided into two sections.

The gist of the present invention is as follows.

[0011] In order to facilitate handling and transport, the unit culvert is divided into two parts to reduce the handling size and the weight.

A lower member is manufactured by embedding a water-stopping elastic body in a conventional manner on a surface perpendicular to an axis that divides the length of the culvert into two in the front and rear direction and dividing the upper and lower parts into two parts.

The upper member is manufactured in the same manner.

The two members, which are divided into upper and lower parts, are vertically overlapped. In this case, a notch for work is provided penetrating the inside, inside, and outside of the upper and lower members, and the upper and lower water-stopping elastic bodies are connected by using the notch for work so as to prevent water leakage. The notch is back-filled with, for example, a non-shrink mortar.

The upper member and the lower member are provided with cutouts in the bolt insertion portions of the side walls, and are fastened by inserting bolts.

The bolt for connecting the upper member and the lower member may be a through-length bolt, may be fastened from the middle of the height of the upper and lower members, or may be fastened at the mating surface with the seat buried. Is also good.

Alternatively, for example, the outer periphery of the water-stopping elastic body portion may be wrapped around a strip steel plate provided on the upper and lower members, and the seam of the strip steel plate may be integrated with the upper and lower members by welding.

Here, the strip steel plate is embedded in the outer periphery of the upper and lower members at the rear, respectively, and the upper and lower members at the front are provided with grooves in which the strip steel plate fits, and the outer periphery of the buried waterproof elastic body portion. Orbit.

The water-stopping elastic body thus arranged expands and contracts in the axial direction to absorb the relative displacement between the culverts.

Here, in the case where a strip steel plate is circulated around the four circumferences of the culvert, the concrete section on one side is loosely connected to the closed section formed by the strip steel plate, so that a group of culverts laid under the ground is formed. , And does not restrict axial displacement.

As described above, the flexibility of the culvert is ensured.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A two-part flexible underdrain according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a two-part flexible box type culvert according to the present invention.

Reference numerals 1a and 1b denote lower U-shaped members in which the water-stopping elastic body 3 is embedded in a plane perpendicular to the axis that divides the length direction into two.

Similarly, reference numerals 2a and 2b denote upper U-shaped members in which a water-stopping elastic body 3 is embedded on a surface perpendicular to an axis which divides the length direction into two.

The embedding of the water-stopping elastic body 3 is performed by the same method as the conventional manufacturing process of the flexible box culvert for each unit.

For example, the inner mold frame and the outer mold frame of 1a are erected so that the end face of the U-shaped member 1a on which the water-stopping elastic body 3 is not buried faces downward, and a reinforcing bar is incorporated into the mold frame. The water-stopping elastic body 3 is temporarily fixed, and concrete is cast, and half of the cross section of the water-stopping elastic body 3 is embedded in the U-shaped member 1a.

Next, the inner mold frame and the outer mold frame of the U-shaped member 1b are erected on the U-shaped frame, concrete is cast by incorporating a reinforcing bar, and the water-stopping elastic body 3 is inserted into the U-shaped member. 1b is completely buried.

Here, at both ends of the waterproof elastic body 3, the waterproof elastic body 3 of the upper U-shaped member and the waterproof elastic body 3 of the lower U-shaped member are overlapped and joined by the notch 4. Stretch with enough time.

The waterproof elastic body 3 is embedded in the upper U-shaped members 2a and 2b in the same procedure.

The upper and lower U-shaped members manufactured as described above are overlapped in a square shape.

FIG. 2 is a side view of FIG. 1, in which the upper U-shaped member 2 and the lower U-shaped member 1 are fastened with PC steel bars 5.

On the side of the culvert main body, a hole for inserting the PC steel bar 5 and a notch 6 for work are provided at the intermediate portions in the height direction of the upper and lower U-shaped members, and PCs having screws cut at both ends are provided.
Pass the steel bar 5 through the tank, fasten it with a washer and a nut,
Is an example of backfilling with non-shrink mortar, for example.

Here, the cross section of the culvert need not necessarily be box-shaped, but may be arch-shaped or the like.

3A and 3B show an example in which the present invention is applied to an arch type culvert. FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a perspective view of an example in which a steel strip is wound.

The upper and lower U-shaped members 1 and 2 are brought into contact with the outer periphery of the upper and lower U-shaped members 1 and 2 so as to cover a portion around which the elastic body 3 turns. 7 is embedded in the outer periphery of the lower U-shaped member 1b and the upper U-shaped member 2b,
On the side of the lower U-shaped member 1a and the upper U-shaped member 2a,
A groove 8 into which the steel strip 7 fits is provided. The steel strip 7 of the lower U-shaped member 1 and the steel strip 7 of the upper U-shaped member 2 are
The upper and lower U-shaped members are integrated by butt welding and formed into a rectangular shape.

Also, as described above, the lower U-shaped member 1
The work cutout 4 is provided at the joint between the water-stopping elastic body 3 of the upper U-shaped member 2 and the upper watertight elastic body 3 so that the upper and lower water-stopping elastic bodies 3 do not have a risk of water leakage. After complete joining, the notch 4 is backfilled with, for example, non-shrink mortar.

FIG. 5 is a sectional view taken along line AA of FIG.
(A), (b), and (c) are examples of the cross-sectional shape of the waterproof elastic body 3.

FIG. 6 is a detailed view of the work notch 10 in the portion of the retaining fitting 12.

The retaining metal fittings 12 utilize holes 9 which penetrate the haunches 11 at the four corners and through which steel bars for connecting culverts are inserted.

In this example, there are four holes 9 at four corners for inserting a steel bar for connecting the culvert, but the number is not limited to the four corners.

U-shaped members 1a, 1b, and 2a, 2b are used to insert notches 10 provided in the ends of the U-shaped members.
a, 1b and 2a, 2b are tightened, but if they are tightened firmly, they will prevent expansion and contraction of the waterproof elastic body 3 and impair the flexibility between adjacent culverts. . FIG. 6E shows a margin for the elongation of the water stopping elastic body 3.

FIG. 7 is a view in which a two-part flexible culvert assembled in this way is arranged at a key point to form a conduit.

In order to form a pipe, a hole 9 through which a steel bar is inserted is formed.
The steel bar 14 is inserted through the notch 10, and the work notch 10 is used to fasten it with a washer and a nut.

After the passage is formed, the work notch 10 is buried back by, for example, a non-shrink mortar, but a cover 13 is provided at the end of the stopper 12 to secure a margin for tightening the stopper 12. Is arranged.

Since the two-piece flexible culvert of the present invention has the above-described structure, the relative displacement in the axial direction between the adjacent culverts is absorbed by the expansion and contraction of the embedded waterproof elastic body 3. Here, the retaining fitting 12 sandwiches the water stopping elastic body 3, but does not hinder expansion and contraction of the water stopping elastic body 3 because there is a margin for tightening.

Since a large relative displacement that acts instantaneously is restrained by the retaining fitting 12, a pipe constituted by a series of connected culverts can maintain its function without being damaged.

[0049] That is against earthquakes is performed longitudinal study using the "response displacement method", even for soft ground, as a beam of laid down by underdrain group, considered in the vertical direction is performed.

FIG. 8 is a diagram for calculating the amount of deformation of the flexible portion on the assumption that the openings are concentrated at the inflection points of the deformation of the group of culverts laid approximately in the case of uneven settlement on soft ground. . (A) is an overall view and (b) is a detailed view of a portion B.

[0051]

The effects of the present invention are as follows.

In a large culvert, flexibility can be imparted to the two-divided culvert, which is divided into two for easy handling and transportation.

By the expansion and contraction of the flexible water-stopping elastic body,
It can absorb the deformation of the culvert group pipes and can fulfill the function of the culvert.

The use of flexible culverts allows for the design of seismic pipelines.

Since the structure can follow the deformation of the ground, no pile is required, which is economical.

This is effective in the case of soft ground where uneven settlement is predicted, ground where the load condition changes, and change in the condition of supporting the pipeline of the culvert group.

Further, the present invention is effective when applied to a place where a configuration change such as an inlet hole attaching portion occurs.

The two-part culvert of the two-part culvert is an integrally molded product manufactured in a factory, and is easy to lay on site, thus shortening the construction period.

[Brief description of the drawings]

FIG. 1 is a perspective view of a two-part flexible box type underdrain according to the present invention.

FIG. 2 is a side view of FIG. 1, in which an upper U-shaped member 2 and a lower U-shaped member 1 are fastened with a PC steel bar 5;

FIG. 3 is an example in which the present invention is applied to an arch type culvert,
(A) is a front view, (b) is a side view.

FIG. 4 is a perspective view of an example in which a steel strip band is wound.

FIGS. 5A, 5B, and 5C are diagrams illustrating examples of a cross section of a flexible water-stopping elastic body 3. FIGS.

FIG. 6 is a cutout 1 for work at a portion of a retaining fitting 12;
FIG.

FIG. 7 is a view in which a two-part flexible culvert is arranged at a key point to form a conduit.

FIG. 8 is a diagram for calculating the amount of deformation of a flexible portion assuming that apertures are concentrated at inflection points of deformation of a group of culverts laid approximately when soft settlement occurs on soft ground. (A) is an overall view and (b) is a detailed view of a portion B.

FIG. 9A is a side sectional view of a conventional flexible culvert, and FIG. 9B is a C sectional view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower U-shaped member, 1a ... Front half of lower U-shaped member, 1b ... Rear half of lower U-shaped member, 2 ... Upper U-shaped member, 2a ... Upper U-shaped member 2b ... Rear half of upper U-shaped member 3 ... Waterproof elastic body 4 ... Notch for work 5 ... PC connecting upper member and lower member
Steel bar, 6 ... Work notch, 7 ... Strip steel plate, 8 ... Groove into which strip steel plate is fitted, 9 ... Hole for inserting steel bar for culvert connection, 10 ... Work notch, 11 ... ... Haunch part, 1
2 ... escape fitting, 13 ... cover, 14 ... steel bar for connecting culvert

[Procedure amendment]

[Submission date] February 19, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Two-section flexible culvert

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a culvert which is connected to each other in the axial direction and is laid in the ground as a waterway, an underground passage, a common ditch, or the like to form a pipeline. The present invention relates to a flexible culvert.

[0002]

2. Description of the Related Art Conventionally, a flexible water-stopping elastic body is buried between two unit culverts in the axial direction to absorb the relative displacement of each culvert.

FIG. 9 (a) is a side sectional view of a conventional flexible culvert, and FIG. 9 (b) is a C sectional view.

[0004] Here, reference numeral 3 denotes a water-stopping elastic body buried around four circumferences.

[0005]

When a culvert becomes large,
The culvert is not a unit because it becomes difficult to handle and transport,
It is divided into two parts and assembled on site.

In a conventional structure in which a waterproof elastic body is inserted between two unit culverts in the axial direction and a steel strip is wound around the outer peripheral surface to provide flexibility, the waterproof elastic body is Both edges had to be buried in each unit culvert as one.

This method cannot be applied to a two-part culvert.

For the above reasons, there has been a demand for a technique of forming a large underdrain by giving flexibility to the divided underdrain.

[0009]

SUMMARY OF THE INVENTION In a culvert, an upper member and a lower member which are divided into two parts in the height direction are stopped by leaving a gap in the axial direction on a surface perpendicular to the axis, which divides the length direction into two in the longitudinal direction. A hydroelastic body is buried, and the upper and lower upper and lower members are prevented from coming off so as not to hinder the expansion and contraction of the elastic body.
The upper and lower members are connected to each other with a margin, and the front and rear upper and lower members are connected to each other to form a closed cross section. waterproofing elastic waterproof elastic body and the lower member, in a portion該止water elastic body matches
Make notches and backfill and connect non-shrink mortar.
The gist is a two-part flexible culvert characterized by the following.

The gist of the present invention is as follows.

[0011] In order to facilitate handling and transport, the unit culvert is divided into two parts to reduce the handling size and the weight.

A lower member is manufactured by embedding a water-stopping elastic body in a conventional manner on a surface perpendicular to an axis that divides the length of the culvert into two in the front and rear direction and dividing the upper and lower parts into two parts.

The upper member is manufactured in the same manner.

The two members, which are divided into upper and lower parts, are vertically overlapped. In this case, a notch for work is provided penetrating the inside, inside, and outside of the upper and lower members, and the upper and lower water-stopping elastic bodies are connected by using the notch for work so as to prevent water leakage. The notch is back-filled with, for example, a non-shrink mortar.

The upper member and the lower member are provided with cutouts in the bolt insertion portions of the side walls, and are fastened by inserting bolts.

The bolt for connecting the upper member and the lower member may be a through-length bolt, may be fastened from the middle of the height of the upper and lower members, or may be fastened at the mating surface with the seat buried. Is also good.

Alternatively, for example, the outer periphery of the water-stopping elastic body portion may be wrapped around a strip steel plate provided on the upper and lower members, and the seam of the strip steel plate may be integrated with the upper and lower members by welding.

Here, the strip steel plate is embedded in the outer periphery of the upper and lower members at the rear, respectively, and the upper and lower members at the front are provided with grooves in which the strip steel plate fits, and the outer periphery of the buried waterproof elastic body portion. Orbit.

The water-stopping elastic body thus arranged expands and contracts in the axial direction to absorb the relative displacement between the culverts.

Here, in the case where a strip steel plate is circulated around the four circumferences of the culvert, the concrete section on one side is loosely connected to the closed section formed by the strip steel plate, so that a group of culverts laid under the ground is formed. , And does not restrict axial displacement.

As described above, the flexibility of the culvert is ensured.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A two-part flexible underdrain according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a two-part flexible box type culvert according to the present invention.

Reference numerals 1a and 1b denote lower U-shaped members in which the water-stopping elastic body 3 is embedded in a plane perpendicular to the axis that divides the length direction into two with a gap in the axial direction .

Similarly, reference numerals 2a and 2b denote upper U-shaped members in which a water-stopping elastic body 3 is embedded with a gap in the axial direction on a surface perpendicular to an axis that divides the length direction into two. is there.

The embedding of the water-stopping elastic body 3 is performed by the same method as the conventional manufacturing process of the flexible box culvert for each unit.

For example, the inner mold frame and the outer mold frame of 1a are erected so that the end face of the U-shaped member 1a on which the water-stopping elastic body 3 is not buried faces downward, and a reinforcing bar is incorporated into the mold frame. The water-stopping elastic body 3 is temporarily fixed, and concrete is cast, and half of the cross section of the water-stopping elastic body 3 is embedded in the U-shaped member 1a.

Next, the inner mold frame and the outer mold frame of the U-shaped member 1b are erected on the U-shaped frame, concrete is cast by incorporating a reinforcing bar, and the water-stopping elastic body 3 is inserted into the U-shaped member. 1b is completely buried.

Here, at both ends of the waterproof elastic body 3, the waterproof elastic body 3 of the upper U-shaped member and the waterproof elastic body 3 of the lower U-shaped member are overlapped and joined by the notch 4. Stretch with enough time.

The waterproof elastic body 3 is embedded in the upper U-shaped members 2a and 2b in the same procedure.

The upper and lower U-shaped members manufactured as described above are overlapped in a square shape.

FIG. 2 is a side view of FIG. 1, in which the upper U-shaped member 2 and the lower U-shaped member 1 are fastened with PC steel bars 5.

On the side of the culvert main body, a hole for inserting the PC steel bar 5 and a notch 6 for work are provided at the intermediate portions in the height direction of the upper and lower U-shaped members, and PCs having screws cut at both ends are provided.
Pass the steel bar 5 through the tank, fasten it with a washer and a nut,
Is an example of backfilling with non-shrink mortar, for example.

Here, the cross section of the culvert need not necessarily be box-shaped, but may be arch-shaped or the like.

3A and 3B show an example in which the present invention is applied to an arch type culvert. FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a perspective view of an example in which a steel strip is wound.

The upper and lower U-shaped members 1 and 2 are brought into contact with the outer periphery of the upper and lower U-shaped members 1 and 2 so as to cover a portion around which the elastic body 3 turns. 7 is embedded in the outer periphery of the lower U-shaped member 1b and the upper U-shaped member 2b,
On the side of the lower U-shaped member 1a and the upper U-shaped member 2a,
A groove 8 into which the steel strip 7 fits is provided. The steel strip 7 of the lower U-shaped member 1 and the steel strip 7 of the upper U-shaped member 2 are
The upper and lower U-shaped members are integrated by butt welding and formed into a rectangular shape.

Also, as described above, the lower U-shaped member 1
The work cutout 4 is provided at the joint between the water-stopping elastic body 3 of the upper U-shaped member 2 and the upper watertight elastic body 3 so that the upper and lower water-stopping elastic bodies 3 do not have a risk of water leakage. After complete joining, the notch 4 is backfilled with, for example, non-shrink mortar.

FIG. 5 is a sectional view taken along line AA of FIG.
(A), (b), and (c) are examples of the cross-sectional shape of the waterproof elastic body 3.

FIG. 6 is a detailed view of the work notch 10 in the portion of the retaining fitting 12.

The retaining metal fittings 12 utilize holes 9 which penetrate the haunches 11 at the four corners and through which steel bars for connecting culverts are inserted.

In this example, there are four holes 9 at four corners for inserting a steel bar for connecting the culvert, but the number is not limited to the four corners.

U-shaped members 1a, 1b, and 2a, 2b are used to insert notches 10 provided in the ends of the U-shaped members.
a, 1b and 2a, 2b are tightened, but if they are tightened firmly, they will prevent expansion and contraction of the waterproof elastic body 3 and impair the flexibility between adjacent culverts. . FIG. 6E shows a margin for the elongation of the water stopping elastic body 3.

FIG. 7 is a view in which a two-part flexible culvert assembled in this way is arranged at a key point to form a conduit.

In order to form a pipe, a hole 9 through which a steel bar is inserted is formed.
The steel bar 14 is inserted through the notch 10, and the work notch 10 is used to fasten it with a washer and a nut.

After the passage is formed, the work notch 10 is buried back by, for example, a non-shrink mortar, but a cover 13 is provided at the end of the stopper 12 to secure a margin for tightening the stopper 12. Is arranged.

Since the two-piece flexible culvert of the present invention has the above-described structure, the relative displacement in the axial direction between the adjacent culverts is absorbed by the expansion and contraction of the embedded waterproof elastic body 3. Here, the retaining fitting 12 sandwiches the water stopping elastic body 3, but does not hinder expansion and contraction of the water stopping elastic body 3 because there is a margin for tightening.

Since a large relative displacement that acts instantaneously is restrained by the retaining fitting 12, a pipe constituted by a series of connected culverts can maintain its function without being damaged.

That is, for the earthquake, the longitudinal direction is examined using the "response displacement method", and the longitudinal direction is examined for the soft ground by using the laid culverts as beams.

FIG. 8 is a diagram for calculating the amount of deformation of the flexible portion on the assumption that the openings are concentrated at the inflection points of the deformation of the group of culverts laid approximately in the case of uneven settlement on soft ground. . (A) is an overall view and (b) is a detailed view of a portion B.

[0051]

The effects of the present invention are as follows.

In a large culvert, flexibility can be imparted to the two-divided culvert, which is divided into two for easy handling and transportation.

By the expansion and contraction of the flexible water-stopping elastic body,
It is possible to absorb the deformation of the culvert group pipeline and fulfill the function of the culvert.

The use of flexible culverts allows for the design of seismic pipelines. Instantaneous size
Is restrained by the retaining bracket
For this reason, pipelines consisting of a series of connected culverts
The function can be ensured without loss.

Since the structure can follow the deformation of the ground, no pile is required, which is economical.

This is effective in the case of soft ground where uneven settlement is predicted, ground where the load condition changes, and change in the condition of supporting the pipeline of the culvert group.

Further, the present invention is effective when applied to a place where a configuration change such as an inlet hole attaching portion occurs.

The two-part culvert of the two-part culvert is an integrally molded product manufactured in a factory, and is easy to lay on site, thus shortening the construction period.

[Brief description of the drawings]

FIG. 1 is a perspective view of a two-part flexible box type underdrain according to the present invention.

FIG. 2 is a side view of FIG. 1, in which an upper U-shaped member 2 and a lower U-shaped member 1 are fastened with a PC steel bar 5;

FIG. 3 is an example in which the present invention is applied to an arch type culvert,
(A) is a front view, (b) is a side view.

FIG. 4 is a perspective view of an example in which a steel strip band is wound.

FIGS. 5A, 5B, and 5C are diagrams illustrating examples of a cross section of a flexible water-stopping elastic body 3. FIGS.

FIG. 6 is a cutout 1 for work at a portion of a retaining fitting 12;
FIG.

FIG. 7 is a view in which a two-part flexible culvert is arranged at a key point to form a conduit.

FIG. 8 is a diagram for calculating the amount of deformation of a flexible portion assuming that apertures are concentrated at inflection points of deformation of a group of culverts laid approximately when soft settlement occurs on soft ground. (A) is an overall view and (b) is a detailed view of a portion B.

FIG. 9A is a side sectional view of a conventional flexible culvert, and FIG. 9B is a C sectional view.

[Description of Signs] 1... Lower U-shaped member, 1a... Front half of lower U-shaped member, 1b... Rear half of lower U-shaped member, 2... Upper U-shaped member, 2a. Front half of upper U-shaped member, 2b ... Rear half of upper U-shaped member, 3 ... Waterproof elastic body, 4 ... Notch for work, 5 ... PC connecting upper member and lower member
Steel bar, 6 ... Work notch, 7 ... Strip steel plate, 8 ... Groove into which strip steel plate is fitted, 9 ... Hole for inserting steel bar for culvert connection, 10 ... Work notch, 11 ... ... Haunch part, 1
2 ... escape fitting, 13 ... cover, 14 ... steel bar for connecting culvert

Claims (1)

[Claims] In a culvert, a water-stopping elastic body is buried in a surface perpendicular to an axis, which divides a length direction into two in a longitudinal direction of an upper member and a lower member divided into two in a height direction, and The lower member is configured to have a closed cross section, and has means for connecting the upper member and the lower member, and the water-stopping elastic body of the upper member and the water-stopping elastic body of the lower member. Culvert.