JP4108219B2 - How to build a culvert - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a culvert construction method constructed by an open-cut method or the like.
[0002]
[Prior art]
Conventionally, a culvert is constructed by an open-cut method or the like.
Here, the construction method by the open cut method of this culvert will be described.
[0003]
(1) Construction of laying concrete First, the ground is excavated, and the laying concrete as the foundation is placed on the excavated ground by on-site casting.
(2) Construction of bottom slab part After the concrete is cured, the reinforcing bars for the bottom slab part are arranged on the concrete, and after the formwork is placed, the concrete is placed and cured to construct the bottom slab part of the culvert.
[0004]
(3) Construction of the side plate part After the concrete is hardened, the inner mold frame is supported by the support work in the vertical direction on both sides of the bottom plate, and the reinforcing bars for the side plate part are arranged on the outer side, The outer mold is supported on the outside in the vertical direction by a support work.
Then, concrete is cast between these inner and outer molds and hardened to construct a culvert side wall.
[0005]
(4) After the concrete of the construction side plate portion of the top plate portion is hardened, a support work is built inside, and a formwork is disposed at the lower surface position of the top plate portion to be constructed.
And the reinforcing steel for a top plate is arrange | positioned on the upper surface side of this formwork, concrete is poured and hardened, and a top plate part is constructed | assembled.
(5) After constructing the culvert by the operations (1) to (4) and removing the formwork, the supporting work, etc., the culvert is backfilled.
[0006]
[Problems to be solved by the invention]
By the way, in order to construct the culvert, a large amount of formwork must be supported by a support work, and a large amount of labor is required for the support work and the work of carrying out, installing, and removing the formwork and support work. As a result, there is a problem that the construction period is prolonged.
[0007]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a culvert construction method that can be constructed very easily and in a short period of time.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the culvert construction method according to claim 1 is characterized in that a ceiling portion is installed on the upper portion of a culvert body having a substantially U-shaped cross-sectional view in which side plate portions are erected on both sides of a bottom plate portion. A pair of side plates connected in the longitudinal direction of the culvert to be constructed, in which a reinforcing bar is provided inside a frame body in which steel materials are assembled in a box shape and an inner wall plate is attached to the inner surface side. The unit is disposed at an opposing position with an interval, and an outer wall plate is attached to the outer surface side, and concrete is placed between the lower ends of these side plate units and the lower ends of these side plate units, and the bottom plate portion Then, the culvert body is constructed by constructing the side plate part by placing concrete between the inner wall plate and the outer wall plate.
[0009]
The method for constructing a culvert according to claim 2 is a method for constructing a culvert in which a ceiling portion is installed on the upper part of a substantially U-shaped culvert body having a side plate portion standing upright on both sides of a bottom plate portion. After the construction of the bottom plate part, on both sides of the bottom plate part, reinforcing bars are provided inside a frame body assembled from steel materials in a box shape, and an inner wall plate is attached on the inner surface side, and the longitudinal direction of the culvert to be constructed A pair of connected side plate units are arranged at opposite positions with an interval between them, an outer wall plate is attached to the outer surface side, and concrete is placed between the inner wall plate and the outer wall plate so that the side plate portion is By constructing, the culvert body is constructed.
[0010]
According to the culvert construction method of claim 1 or claim 2, the side plate units having the inner wall plate attached to the inner surface side of the frame are arranged to face each other, and the outer wall plate is attached to the outer surface side thereof. Because the side plate part is constructed by placing concrete on this side plate unit, the construction work at the site is less than when constructing by placing the formwork supported by the support at the site. It can be greatly improved. That is, since the formwork is not required, the work for supporting the formwork and the work for carrying in / out the installation of the formwork and the support, installation, and removal work can be made unnecessary, thereby shortening the work period.
[0011]
The culvert construction method according to claim 3 is the culvert construction method according to claim 1 or 2, wherein the ceiling part is composed of a plurality of precast ceiling slabs that are stretched over the side plate part, ceiling plate is Da設a bottom plate having a curved surface, and end plates provided at both ends of the bottom plate, the concrete in between the bottom plate on both sides concrete enclosed depending on the side plate provided in the portion設空The end plate is formed to have a length corresponding to the width dimension of the culvert body by sliding and moving the end plate along the curved surface of the bottom plate.
[0012]
In this way, by sliding and moving the end plate of the formwork, it is possible to manufacture a ceiling plate that fits the width dimension of the culvert body very easily.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the culvert construction method of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a culvert. The culvert 1 is provided over the upper end of the side plate portion 3 on the upper portion of the culvert main body 1A composed of a bottom plate portion 2 and side plate portions 3 erected on both sides of the bottom plate portion 2. And the ceiling part 4.
[0014]
Next, a construction method for constructing the culvert 1 having the above structure will be described along the procedure.
(1) First, after excavating the ground on which the culvert 1 is to be installed, as shown in FIG.
[0015]
(2) Next, as shown in FIG. 3, side plate units 12 constituting the side plate portion 3 are disposed on both side portions on the upper surface side of the laying concrete 11.
As shown in FIGS. 4-8, the side plate unit 12 connects the several unit body 12a. The unit body 12a includes a frame 33 formed by assembling a steel material 32 such as H steel into a box shape having an L-shape in cross section, a cage-type reinforcing bar 34 disposed inside the frame 33, and the frame body 33. The unit body 12a is composed of an inner wall plate 35 attached to the inner surface, and these unit bodies 12a are connected to each other in the longitudinal direction via a connecting steel material 36 and a connecting inner wall plate 37.
[0016]
The frame 33 of the unit body 12a is provided with joint pieces 33a on both sides thereof, and the connecting steel material 36 is fastened and fixed to the joint pieces 33a by bolts and nuts. The frames 33 are connected in the tunnel axis direction.
The connecting inner wall plate 37 is provided between the inner wall plates 35 of the unit body 12a. The connecting inner wall plate 37 is fastened and fixed to the connecting steel member 36 by bolts and nuts. .
[0017]
A cage-type reinforcing bar 34a is provided in a portion surrounded by the unit body 12a and the connecting steel member 36 that connects the unit bodies 12a.
The inner wall plate 35 and the connecting inner wall plate 37 are not provided on the upper surface side of the lower horizontal portion between the frame body 33 and the frame bodies 33. A plurality of connecting reinforcing bars 15a protrude from the lower horizontal portion between the frame 33 and the frame 33 toward the front side.
[0018]
And when installing said side plate unit 12, first, the unit body 12a is arrange | positioned on the upper part of the laying concrete 11, and these unit bodies 12a are connected via the steel material 36 for connection, and the inner wall plate 37 for connection. Connect them together. That is, the frame members 33 of the unit bodies 12a are connected to each other by fastening and fixing the connecting steel members 36 to the joint pieces 33a of the frame bodies 33 of the adjacent unit bodies 12a with bolts and nuts. Further, a connecting inner wall plate 37 is disposed between the inner wall plates 35 of the unit body 12a, and the connecting inner wall plate 37 is fastened and fixed to the connecting steel member 36 with bolts and nuts.
[0019]
Next, the cage-type reinforcing bar 34 a is disposed in a portion surrounded by the frame body 33 and the connecting steel member 36 of the unit body 12 a.
Next, the outer wall plate 43 is screwed and fixed to the outer surface side of the unit body 12a and the outer surface side between these unit bodies 12a.
[0020]
(3) When the side plate units 12 having the above configuration are installed on both sides of the top surface of the spread concrete 11, as shown in FIG. 9, the reinforcing bars 17 are disposed between the side plate units 12 on the spread concrete 11. .
(4) Thereafter, as shown in FIG. 10, concrete C is placed on the laying concrete 11, and the reinforcing bars 17 are embedded. The concrete C is placed up to the upper surface position in the horizontal portion at the lower end of the side plate unit 12.
[0021]
(5) After the concrete C placed at the lower end is hardened, the concrete C is poured between the inner wall plate 35, the connecting inner wall plate 37 and the outer wall plate 43 as shown in FIG.
As a result, the culvert body 1 </ b> A composed of the bottom plate portion 2 and the side plate portion 3 is constructed.
[0022]
(6) When the concrete C in the side plate unit 12 is hardened, a plurality of precast ceiling plates 18 are disposed on the top of the culvert body 1A, and fixed portions 18a formed horizontally at both ends of the ceiling plate 18 Is fixed to the upper end of the side plate portion 3 and the ceiling plates 18 are joined to each other to install the ceiling portion 4 to complete the box-type culvert 1 (see FIG. 1), and then backfilled.
The outer wall plate 43 of the side plate unit 12 may be removed and diverted after the concrete C is hardened, or may be buried as it is.
[0023]
Thus, according to the above-described culvert construction method, the inner wall plate 35 is attached to the inner surface side of the frame body 33 assembled in advance in an L-shaped box shape, and the cage-type reinforcing bar 34 is arranged in the frame body 33. The unit plate 12a is installed and unitized, and the unit plate 12a is connected in the longitudinal direction via the connecting steel material 36 and the connecting inner wall plate 37, and the outer plate 43 is attached to the outer surface side. Since the side plate part 3 is constructed by placing concrete C into the unit 12, the construction work on the site is greatly improved compared to the case where the mold is supported and arranged by a support work. Can be made. That is, since the formwork is not required, the work for supporting the formwork and the work for carrying in / out the installation of the formwork and the support, installation, and removal work can be made unnecessary, thereby shortening the work period.
[0024]
In the above example, an L-shaped side plate unit 12 is used. However, as this side plate unit, a box-type side plate unit 19 may be used as shown in FIG. When the box-type side plate unit 19 is used, the side plate unit 19 is erected on the upper portions of both side portions of the previously constructed bottom plate unit 2, and concrete C is placed in the side plate unit 19. Then, the side plate portion 3 is constructed, and then the ceiling plate 18 is attached to constitute the ceiling portion 4. In addition, the code | symbol 19a in a figure is a PC steel wire strained in order to introduce prestress into the side plate part 3. FIG.
[0025]
Here, what is shown in FIG. 13 is a mold 21 for molding the ceiling slab 18 constituting the ceiling portion 4. The mold 21 has a bottom plate 22 whose upper surface is a curved surface, end plates 23 provided at both ends of the bottom plate 22, and side plates (not shown) provided on both sides of the bottom plate 22. A portion surrounded by the bottom plate 22, the end plate 23, and the side plate is a concrete placement space. In addition, a piece member 24 for forming the fixing portions 18 a at both ends of the ceiling slab 18 is provided at the corners of the bottom plate 22 and the end plate 23.
[0026]
That is, the piece member 24 has a contact surface 24a that contacts the curved surface of the bottom plate 22, a contact surface 24b that contacts the end plate 23, and a molding surface 24c that molds the fixed portion 18a. By abutting the contact surfaces 24a and 24b with the bottom plate 22 and the end plate 23, the molding surface 24c is made horizontal. In order to mold the ceiling slab 18 with the mold 21, concrete is placed in the placement space in a state in which the top of the mold 21 is covered with a lid (not shown) to surround the placement space. And then curing.
[0027]
Further, when the ceiling plate 18 having a different length is formed by the mold 21, the end plate 23 is slid along the curved surface of the bottom plate 22. At this time, the piece member 24 is replaced with one that matches the curvature of the curved surface of the bottom plate 22 at that position in accordance with the position of the moved end plate 23.
As described above, according to this formwork 21, the end plate 23 is slid and moved so that the ceiling slab 18 having different lengths can be formed in accordance with the width dimension of the culvert body. it can.
[0028]
【The invention's effect】
As described above, according to the culvert construction method of the present invention, the following effects can be obtained.
According to the construction method of the culvert according to claim 1 or 2, the side plate units having the inner wall plate attached to the inner surface side of the frame body are arranged to face each other, the outer wall plate is attached to the outer surface side, Since the side plate part is constructed by placing concrete on the side plate unit, the construction work on the site is greatly reduced compared to the case where the formwork is supported and arranged on the site by supporting work. Can be improved. That is, since the formwork is not required, the work for supporting the formwork and the work for carrying in / out the installation of the formwork and the support, installation, and removal work can be made unnecessary, thereby shortening the work period.
[0029]
According to the culvert construction method of the third aspect, it is possible to manufacture a ceiling plate that fits the width dimension of the culvert body very easily by sliding and moving the end plate of the mold.
[Brief description of the drawings]
FIG. 1 is a perspective view of a culvert for explaining a culvert construction method according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an excavated ground after construction of laying concrete for explaining a method for constructing a culvert according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of the excavated ground after the arrangement of the side plate unit for explaining the culvert construction method according to the embodiment of the present invention.
FIG. 4 is a perspective view of a side plate unit used in the culvert construction method according to the embodiment of the present invention.
FIG. 5 is a side view of a side plate unit for explaining a culvert construction method according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view of a side plate unit for explaining a culvert construction method according to an embodiment of the present invention.
FIG. 7 is a side view of a frame constituting a side plate unit for explaining a culvert construction method according to an embodiment of the present invention.
FIG. 8 is a front view of a frame constituting the side plate unit for explaining the culvert construction method according to the embodiment of the present invention.
FIG. 9 is a cross-sectional view of the excavated ground after the reinforcing bars are arranged for explaining the culvert construction method according to the embodiment of the present invention.
FIG. 10 is a cross-sectional view of an open ground after construction of a bottom slab for explaining a culvert construction method according to an embodiment of the present invention.
FIG. 11 is a cross-sectional view of the excavated ground after the construction of the culvert body for explaining the culvert construction method according to the embodiment of the present invention.
FIG. 12 is a sectional view of a culvert for explaining a culvert construction method according to another embodiment of the present invention.
FIG. 13 is a cross-sectional view of a mold for forming a ceiling slab used in the culvert construction method according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Calvert 1A Calvert main body 2 Bottom plate part 3 Side plate part 4 Ceiling part 12, 19 Side plate unit 14 Frame 18 Ceiling plate 22 Bottom plate 23 End plate 32 Steel material 33 Frame 34, 34a Basket-type reinforcing bar (rebar)
35 Inner Wall Plate 36 Connecting Steel 37 Connecting Inner Wall Plate 43 Outer Wall Plate C Concrete

Claims (3)

A method for constructing a culvert comprising installing a ceiling portion on the upper part of a substantially U-shaped culvert body in which a side plate portion is erected on both sides of a bottom plate portion,
A pair of side plate units connected in the longitudinal direction of the culvert to be constructed, with a reinforcing bar provided on the inside of the frame body assembled from a steel box and an inner wall plate attached to the inner surface side, are spaced at opposite positions. And installing the outer wall plate on the outer surface side, and placing the concrete between the lower ends of these side plate units and the lower ends of these side plate units to construct the bottom plate portion, and then the inner wall plate and the outer wall A culvert construction method comprising constructing the culvert body by placing concrete between the plates and constructing the side plate portion. A method for constructing a culvert comprising installing a ceiling portion on the upper part of a substantially U-shaped culvert body in which a side plate portion is erected on both sides of a bottom plate portion,
After the construction of the bottom plate part, reinforcing bars are provided inside the frame body in which the steel materials are assembled in a box shape on both sides of the bottom plate part, and the inner wall plate is attached to the inner surface side, and connected in the longitudinal direction of the culvert to be constructed. A pair of side plate units are arranged at opposite positions with an interval, an outer wall plate is attached to the outer surface side, and concrete is placed between the inner wall plate and the outer wall plate to construct the side plate portion. A culvert construction method comprising constructing the culvert body. The ceiling portion includes a plurality of precast ceiling plates spanned over the side plate portion, and the ceiling plate includes a bottom plate having a curved surface, end plates provided at both ends of the bottom plate, and the bottom plate. is formed by pouring concrete into between the side plates provided thus enclosed by concrete設空that on both sides of, by moving the end plate is slid along the curved surface of the bottom plate, The culvert construction method according to claim 1 or 2, wherein the culvert body is formed to a length corresponding to a width dimension of the culvert body.

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