JP2008169595A - Culvert member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a culvert member which is easily carried in. <P>SOLUTION: In construction of the culvert member, mounting lower surfaces 25, 26 of a pair of side surface members 21, 22 are placed on a mounting upper surface 16 of a bottom surface member 13, and mounting lower surfaces 43, 44 of an upper surface member 41 are superposed on mounting upper surfaces 27, 28 of the respective side surface members 21, 22 to connect between the side surface members 21, 22, to thereby allow the side surface members 21, 22 to be self-supported. Thus when a precast member 11 as the culvert member is set, the side surface members 21, 22 and the upper surface member 41 need not be suspended or supported, and the side surface members 21, 22 and the upper surface member 41 can be carried in separately without assembling the same, to thereby facilitate carrying in of the side surface members 21, 22, and the upper surface member 41. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a culvert member having a pair of side members.

Conventionally, as this type of culvert member, a bottom plate leg portion is integrally provided at a lower portion of an arch wall portion as a side member having an arcuate cross section, and these arch leg portions are configured to be able to stand on the bottom plate leg portion. Yes. And after installing in a state where the upper portions of the pair of arch wall portions are in contact with each other, by forming concrete on the spot between the bottom plate legs of these arch wall portions, the bottom plate portion is formed. A configuration for constructing a culvert is known (for example, see Patent Document 1).
JP 2003-193545 A

  However, the above-described culvert member is configured such that the upper portions of the pair of arch wall portions are in contact with each other. Therefore, it is necessary to make the height dimension when installing these arch wall portions substantially the same as the height dimension of the place where these arch wall portions are carried in, so that there is a problem that it is not easy to carry in these arch wall portions. is doing.

  This invention is made | formed in view of such a point, and it aims at providing the culvert member which is easy to carry in.

  The culvert member according to claim 1 is placed between the pair of side surface members in a state where the pair of side surface members having an arcuate cross section and the center side of the arcuate arc of the pair of side surface members are opposed to each other. And an upper surface member having an arcuate cross section that allows the pair of side surface members to be self-supporting.

  The culvert member according to claim 2 is the culvert member according to claim 1, wherein the pair of side surface members are arranged on the side edges on the side where the upper surface members in the width direction of the pair of side surface members are placed. An installation surface inclined downward toward the center of the member is formed, and a mounting surface inclined downward toward the inside of the upper surface member is formed on both side edges of the upper surface member in the width direction. It is what.

  A culvert member according to a third aspect is the culvert member according to the first or second aspect, wherein mounting portions on which the pair of side surface members are mounted are respectively provided on both side edges in the width direction, and the pair of mounting members are provided on the mounting portions. A substantially plate-like bottom member on which the side member is installed is provided.

  A culvert member according to a fourth aspect is the culvert member according to the third aspect, wherein the pair of side surface members are disposed on the side edges of the pair of side surface members on the side of the bottom surface member in the width direction. A mounting surface inclined upward toward the center side of the side surface member is formed, and an installation surface inclined upward toward the inside of the bottom surface member is formed on the mounting portion of the bottom surface member. It is what.

  The culvert member according to claim 5 is the culvert member according to any one of claims 1 to 4, wherein the pair of side surface members and the upper surface member have inner surfaces corresponding to the outer surfaces of the pair of side surface members and the upper surface member. It is installed in the tube.

  According to the culvert member of the first aspect, by placing the upper surface member between the pair of side members in a state where the center sides of the arcuate arcs of the pair of side members are opposed to each other, Side members are self-supporting. Therefore, it is not necessary to hold or position the pair of side members and the top member in a state where the pair of side members and the top member are installed, and the pair of side members and the top member can be shifted and carried in. The pair of side members and the upper member can be easily carried in.

  According to the culvert member according to claim 2, in addition to the effect of the culvert member according to claim 1, each of the installation surface of the pair of side members and the placement surface of the upper surface member is inclined downward toward the center side or the inner side. is doing. Therefore, when the installation surface of the upper surface member is placed on the installation surface of the pair of side surface members and the upper surface member is placed between the pair of side surface members, Since the member can be prevented from falling inward, the pair of side surface members can be made independent.

  According to the culvert member of the third aspect, in addition to the effect of the culvert member according to the first or second aspect, the pair of side members are placed on the placement portion of the bottom member, and the upper surface is interposed between the pair of side members. Since the pair of side members are self-supporting by placing the member, the pair of side members can be self-supporting even if the bottom member is used.

  According to the culvert member according to claim 4, in addition to the effect of the culvert member according to claim 3, each of the mounting surface of the pair of side surface members and the installation surface of the bottom surface member is inclined upward toward the center side or the inside. is doing. Therefore, for example, when a bottom member is installed in the pipe, a mounting surface of the pair of side members is mounted on the installation surface of the bottom member, and the top member is mounted between the pair of side members, A pair of side members is pressed against the inner surface of the tube. Therefore, since the pair of side members can be prevented from falling inward due to the weight of the top member and each side member, for example, even when the pair of side members are placed on the bottom member installed in the tubular body, These self-supporting side members can be easily made.

  According to the culvert member of the fifth aspect, in addition to the effect of the culvert member according to any one of the first to fourth aspects, the pair of side surface members and the upper surface member are installed in the tube body so that the pair of side surface members are in the tube body. Pressed against. Therefore, since the pair of side members can be prevented from falling inward, the pair of side members can be easily self-supported in the tube.

  Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS.

  1 to 4, reference numeral 1 denotes a box as a tubular body. The box 1 is a pipe that is already installed in the ground and is formed in an elongated cylindrical shape having a substantially horseshoe-shaped longitudinal section. Here, the box 1 is provided with a bottom part 2 as an invert part having a concave arc shape in the cross section in the width direction that forms the bottom surface of the box 1. The bottom portion 2 has an inner side surface 3 positioned on the inner side of the bottom portion 2, and the inner side surface 3 is formed in a cross-sectional concave arc shape along the longitudinal direction.

  Further, on both sides of the bottom portion 2, circumferential surface portions 4 having a circular cross section in the width direction that form the upper surface and side surfaces of the box 1 are formed along the longitudinal direction of the bottom portion 2. The peripheral surface portion 4 is formed in an inverted U-shaped cross section having a curvature radius smaller than the curvature radius of the bottom portion 2 in the width direction. That is, the peripheral surface portion 4 is formed in a horseshoe shape, which is a substantially circular shape in which the central portion in the height direction of the peripheral surface portion 4 is widened most in the width direction. Further, the peripheral surface portion 4 has one end portion in the width direction of the peripheral surface portion 4 integrally connected to one end portion in the width direction of the bottom portion 2, and the other end portion in the width direction of the peripheral surface portion 4 is the width of the bottom portion 2. It is integrally connected to the other end of the direction. And this peripheral surface part 4 is formed in the circular arc surface shape which continued in the circumferential direction ranging from the one end part of the width direction of this peripheral surface part 4 to the other end part of the width direction of this peripheral surface part 4. .

  In addition, an inner side surface 5 having an inverted U-shaped cross section in the width direction is formed inside the peripheral surface portion 4, and the inner side surface 5 is about 3 minutes in the width direction of the upper center of the inner side surface 5. An inner surface upper portion 6 constituting one region of the inner surface, and a pair of inner surface side portions 7 and 8 constituting a region of about one third each in the circumferential direction on both sides of the inner surface upper portion 6 continuous with the inner surface upper portion 6. Is formed. Furthermore, the inner surface upper portion 6 and the inner surface side portions 7 and 8 are formed in a circular arc shape that is continuous in the circumferential direction of the peripheral surface portion 4 as shown in FIGS. 1, 2, and 4.

  And the inside of this box 1 is carried in in this box 1, and covers each of the inner surface 3 of the bottom part 2 of this box 1, and the inner surface 5 of the surrounding surface part 4 over the circumferential direction. Then, a precast member 11 which is a culvert member as a repair member for repairing and reinforcing the box 1 is inserted. The precast member 11 is a box culvert as a box rehabilitation, and is formed in a substantially circular vertical cross section corresponding to the box 1 in the cross section in the width direction, for example, concrete such as reinforced concrete or prestressed concrete. That is, the precast member 11 is formed in a shape having an outer surface 12 that is substantially the same shape as the inner surfaces 3 and 5 of the box 1. Further, the precast member 11 is formed such that the length in the depth direction of the precast member 11 is a predetermined length dimension, for example, a length dimension of about 1000 mm.

  Specifically, the precast member 11 includes a bottom surface member 13 that is installed on the inner side surface 3 of the bottom 2 of the box 1 and covers the inner side surface 3. The bottom surface member 13 has an arcuate outer side surface 14 having an arc shape in the width direction corresponding to the inner side surface 3 of the bottom portion 2 of the box 1 among the inner side surfaces 3 and 5 of the box 1. And has a constant thickness over the width direction. Further, on both sides of the outer side surface 14 in the width direction, of the inner side surfaces 3 and 5 of the box 1, there is an upper side corresponding to the lower edge of the inner side parts 7 and 8 of the peripheral surface part 4 of the box 1. An arcuate outer edge surface 15 having a cross-sectional arc shape in the width direction that is bent toward is formed.

  Further, on the edge of each outer edge surface 15 which is a side edge in the width direction of the bottom surface member 13, there is a flat placement upper surface 16 which is a placement surface as a placement portion inclined downward from the inside toward the outside. Each is formed. These mounting top surfaces 16 are end surfaces in the width direction of the bottom surface member 13, and are formed on a flat surface along the normal direction of the bottom surface member 13 in a portion where the mounting top surface 16 is provided. Specifically, these mounting upper surfaces 16 are inclined along the normal direction of the position where the tip of the outer edge surface 15 of the bottom surface member 13 of the inner surface 5 of the peripheral surface portion 4 of the box 1 faces. Yes. Further, an arcuate inner side surface 17 having a concave cross-sectional shape in the width direction that forms the bottom of the box 1 after repair is formed on the arcuate center side opposite to the outer side surface 14 of the bottom member 13. Yes.

  Here, a through hole 18 penetrating in the thickness direction of the bottom surface member 13 is formed at the center of the bottom surface member 13 in the depth direction. This through hole 18 is for inserting a glite hose (not shown). Further, this grout hose is for injecting a graft (not shown) such as liquid cement paste or mortar between the outer side surface 14 of the bottom member 13 and the inner side surfaces 3 and 5 of the box 1.

  On the other hand, on the upper surface of the bottom surface member 13, a cross section is installed facing the pair of inner surface side portions 7, 8 of the peripheral surface portion 4 of the box 1 and covers the inner surface 5 of the pair of inner surface side portions 7, 8. A pair of arc-shaped side members 21 and 22 are stacked and installed. The pair of side surface members 21 and 22 correspond to the inner side surface 5 of the pair of inner surface side portions 7 and 8 positioned in the width direction which is the horizontal direction of the box 1 among the inner side surfaces 3 and 5 of the box 1. The outer side surfaces 23 and 24 having a circular arc shape having a circular cross section in the width direction are formed over the width direction so as to have a constant thickness dimension equal to the thickness dimension of the bottom surface member 13. Moreover, these outer side surfaces 23 and 24 cover about 1/3 area | region of the both sides of the width direction of this peripheral surface part 4 among the peripheral surface parts 4 of the box 1, ie, inner surface side parts 7 and 8. It is formed to be able to.

  Here, the horizontal direction of the box 1 refers to the inner side surface 3 of the bottom 2 of the box 1 even when the box 1 is inclined and installed with respect to the ground surface. The horizontal direction with respect to the direction which passes through each of the both side edges of the width direction.

  Further, the lower side edge, which is one side edge of the outer side surfaces 23, 24 of the pair of side members 21, 22, has a shape corresponding to the mounting upper surface 16 of the bottom surface member 13, and this mounting On the upper surface 16, mounting lower surfaces 25 and 26 are provided as mounting surfaces on which the side members 21 and 22 can be stacked and installed. These mounting lower surfaces 25 and 26 are provided on the side of the pair of side surface members 21 and 22 in the width direction on the side installed on the mounting upper surface 16 of the bottom surface member 13, and these mounting lower surfaces 25 and 26 Is formed on a flat surface along the normal direction of each of the side members 21 and 22. Accordingly, the mounting lower surfaces 25 and 26 are inclined downward from the inner side surfaces 29 and 30 of the side members 21 and 22 toward the outer side surfaces 23 and 24, respectively. Furthermore, these mounting lower surfaces 25 and 26 are in the normal direction of the position where the lower end edges of the outer side surfaces 23 and 24 of the pair of side members 21 and 22 of the inner surface 5 of the peripheral surface portion 4 of the box 1 face each other. Inclined along.

  In addition, the pair of side members 21 and 22 are supported on the upper side edge, which is the other side edge of the outer side surfaces 23 and 24 of the pair of side members 21 and 22, with the pair of side members 21 and 22 standing independently. , 22 are provided with flat mounting upper surfaces 27 and 28 as installation surfaces inclined downward from the outer surface 23, 24 side to the inner surface 29, 30 side. These placement upper surfaces 27 and 28 are provided on the side opposite to the side installed on the bottom surface member 13 of the side portions in the width direction of the pair of side surface members 21 and 22. Further, on the center side of the arc shape opposite to the outer surfaces 23, 24 of the pair of side members 21, 22, there is an inner side surface 29, arc-shaped in the width direction that becomes the side portion of the box 1 after repair. 30 is formed.

  Further, on the upper part of the pair of side surface members 21 and 22, the upper surface member 41 having an arcuate cross section is provided so as to face the inner upper surface 6 of the peripheral surface portion 4 of the box 1 and covers the inner surface 5 of the inner upper surface 6. Are stacked and installed. The upper surface member 41 has an outer surface 42 having an arcuate surface shape having an arc shape in a cross section in the width direction corresponding to the inner surface 5 of the inner upper surface 6 of the box 1 among the inner surfaces 3 and 5 of the box 1. The bottom surface member 13 and the pair of side surface members 21 and 22 are formed to have a constant thickness dimension equal to the thickness dimension of the pair of side surface members 21 and 22 in the width direction. Further, the outer side surface 42 is formed so as to cover an area of about one third of the peripheral surface portion 4 which is a portion between the peripheral surface portions 4 of the box 1 and being covered by the pair of side surface members 21 and 22. Has been. That is, the outer side surface 42 is formed so as to cover the inner side surface 5 of the inner surface upper portion 6 located in the upper portion of the peripheral surface portion 4 in the peripheral surface portion 4 of the box 1.

  Further, on both side edges in the width direction of the outer surface 42 of the upper surface member 41, the pair of side members 21 and 22 are opposed to each other so that the inner surfaces 29 and 30 of the pair of side members 21 and 22 face each other. , 22 are provided as mounting surfaces with shapes corresponding to the mounting surfaces 27, 28, respectively. The mounting lower surfaces 43 and 44 are formed by placing the upper surface member 41 on the mounting upper surfaces 27 and 28 of the pair of side surface members 21 and 22 in a state where the pair of side surface members 21 and 22 are stacked on the bottom surface member 13, respectively. The pair of side members 21 and 22 are self-supported by being bridged and stacked and installed. Specifically, the mounting lower surfaces 43 and 44 are formed as flat surfaces inclined downward from the outer surface 42 side of the upper surface member 41 toward the inner surface 45 side.

  A through hole 18 for inserting a grout hose is provided at the center of the upper surface member 41 in the depth direction. Further, an arcuate inner side surface 45 having a cross section in the width direction, which is an upper portion of the box 1 after repair, is formed on the arcuate center side opposite to the outer side surface 42 of the upper surface member 41.

  On the other hand, the bottom member 13, the pair of side members 21, 22 and the top member 41 of the precast member 11 are carried into the box 1 with the bottom member 13, the pair of side members 21, 22 and the top member 41, respectively. The frame body 51, which is a carrying-in installation means as a holding device that facilitates installation, is detachably connected. The frame body 51 includes a bottom frame 52 that is detachably attached to the inner side surface 17 of the bottom surface member 13 of the precast member 11 in the width direction. The bottom frame 52 has a sheet-like rubber pad 53 as a cushioning member sandwiched between the bottom frame 52 and the inner surface 17 of the bottom surface member 13 with a predetermined space therebetween. It is fixed to the inner side surface 17 of 13 so that removal is possible over the width direction. Here, the rubber pad 53 is formed to have a thickness dimension of about 10 mm, for example. The bottom frame 52 is formed by curving the longitudinal direction of the bottom frame 52 in an arc shape along the width direction of the inner surface 17 of the bottom member 13. Further, the bottom frame 52 is formed such that both ends in the longitudinal direction of the bottom frame 52 are positioned at both edges in the width direction of the inner surface 17 of the bottom member 13.

  Further, a base frame 54 having a linear longitudinal direction in which both ends are connected to both ends in the longitudinal direction of the bottom frame 52 is attached to the inside of the bottom frame 52. The foundation frame 54 is attached to the bottom frame 52 in a state where the longitudinal direction of the foundation frame 54 is aligned with the curved longitudinal direction of the bottom frame 52.

  Further, both ends in the longitudinal direction of the bottom frame 52 are paired with a pair of side frames 55 and 56 that are detachably attached to the inner side surfaces 29 and 30 of the pair of side members 21 and 22 of the precast member 11 in the width direction. It is connected with the lower end part which is one end part of the longitudinal direction of this so that rotation is possible. The pair of side frames 55 and 56 are coupled such that the lower ends of the pair of side frames 55 and 56 are rotatable with respect to the bottom frame 52 in the vertical direction, that is, in the vertical direction.

  Further, the pair of side frames 55, 56 sandwich the rubber pad 53 with a predetermined gap between the pair of side frames 55, 56 and the inner side surfaces 29, 30 of the side members 21, 22. In this state, for example, bolts or the like are detachably fixed to the inner side surfaces 29 and 30 of the side surface members 21 and 22 in the width direction. Therefore, the pair of side frames 55, 56 has the lower end edge in the width direction of each of the pair of side members 21, 22 up and down with respect to both side edges in the width direction of the bottom member 13 attached to the bottom frame 52. Holds in the direction of rotation.

  Then, the pair of side frames 55 and 56 bend the longitudinal directions of the pair of side frames 55 and 56 in an arc shape along the width direction of the inner side surfaces 29 and 30 of the side members 21 and 22, respectively. Is formed. In addition, the pair of side frames 55 and 56 has an upper end that is the other end in the longitudinal direction of the pair of side frames 55 and 56 in the width direction of the inner side surfaces 29 and 30 of the side members 21 and 22. It is formed so as to be located over the upper end which is the other end.

  Further, at the center of the pair of side frames 55 and 56 in the longitudinal direction, one end portions of hydraulic cylinders 57 and 58 as extendable expansion / contraction means are respectively rotatable in the vertical direction which is the vertical direction. It is connected. These hydraulic cylinders 57 and 58 are formed to have an expansion / contraction width, that is, a stroke of about 400 mm, for example, and are connected to a compressor A previously installed in the box 1 so that the hydraulic cylinders 57 and 58 expand and contract. Operated. Further, the other end portions of the hydraulic cylinders 57 and 58 are in the vertical direction at positions spaced apart at equal intervals from the center portion in the longitudinal direction of the base frame 54 toward both ends in the longitudinal direction. Each is connected so as to be rotatable in the vertical direction.

  In addition, a pair of vertical frames 61 and 62 having a linear longitudinal direction along the vertical direction are juxtaposed between portions of the basic frame 54 where the other ends of the hydraulic cylinders 57 and 58 are connected. Has been. These vertical frames 61 and 62 have a longitudinal direction orthogonal to the longitudinal direction of the base frame 54, and the lower end, which is one longitudinal end of the vertical frames 61 and 62, is the center of the bottom frame 52 in the longitudinal direction. It is connected and fixed at a position spaced apart from the part at equal intervals. These vertical frames 61 and 62 are formed to have a length dimension smaller than the vertical dimension of the inner side surfaces 3 and 5 of the box 1.

  Further, a connecting frame 63 for connecting the vertical frames 61 and 62 so as to bridge the vertical frames 61 and 62 is attached to the upper end side which is the other end portion in the longitudinal direction of the vertical frames 61 and 62. The connecting frame 63 has a longitudinal direction orthogonal to the longitudinal direction of the pair of vertical frames 61 and 62. A hydraulic cylinder 64 is attached to the center of the connecting frame 63 in the longitudinal direction as lifting / lowering means. The hydraulic cylinder 64 is formed to have an elevation width, that is, a stroke of about 100 mm, for example, and is connected to a compressor A previously installed in the box 1 so that the hydraulic cylinder 64 is moved up and down. Further, the central portion of the upper frame 65 in the width direction is connected and fixed to the upper end portion of the hydraulic cylinder 64.

  The upper frame 65 is detachably attached to the inner side surface 45 of the upper surface member 41 of the precast member 11 in the width direction. Then, the upper frame 65 has a sheet-like rubber pad 53 sandwiched between the upper frame 65 and the inner surface 45 of the upper surface member 41 with a predetermined gap therebetween. Removably fixed to the inner side surface 45 across the width direction. The upper frame 65 is formed by curving the longitudinal direction of the upper frame 65 in an arc shape along the width direction of the inner surface 45 of the upper surface member 41. Further, the upper frame 65 is formed such that both end portions in the longitudinal direction of the upper frame 65 are positioned inside both end edges in the width direction of the inner side surface 45 of the upper surface member 41.

  Further, a lifting frame 66 having a longitudinal direction perpendicular to the longitudinal direction of the vertical frames 61 and 62 is attached to an intermediate portion in the longitudinal direction of the pair of vertical frames 61 and 62. The lifting frame 66 has a central portion in the longitudinal direction of the lifting frame 66 connected and fixed to a pair of vertical frames 61 and 62. In addition, the lifting frame 66 is configured such that the inner side surfaces of the pair of side frames 55 and 56 are opposite to the ends of the lifting frame 66 in a state where the pair of side frames 55 and 56 are rotated inward. It is formed in a length dimension smaller than the length dimension of the base frame 54 so as not to contact the part. Further, the lifting frame 66 is attached in a state where the longitudinal direction of the lifting frame 66 is aligned with the longitudinal direction of the basic frame 54.

  A pair of lift cases 67 and 68 are attached to the lower end portion of the lifting frame 66 as a locking portion having a rectangular frame shape in a side view. The pair of lift cases 67 and 68 are attached at positions spaced from the central portion in the longitudinal direction of the lifting frame 66 at equal intervals toward both ends in the longitudinal direction. That is, the pair of lift cases 67 and 68 are insertion locking holes into which a pair of forks C attached to the front surface of the forklift B as a work machine shown in FIG.

  Here, the forklift B is configured to be able to travel on the inner side surface 3 of the bottom 2 in the box 1. A driver's seat D for operating the forklift B is provided at the front upper portion of the forklift B. A pair of masts E having a longitudinal direction along the vertical direction are provided on the front side of the driver's seat D. It is attached so that it can swing in the front-rear direction. Further, a pair of forks C is attached to the pair of masts E so as to be movable in the vertical direction, that is, to be able to move up and down.

  Next, the repair method of the above embodiment will be described with reference to FIG.

  First, as a shaft forming process, a shaft not shown is formed at a predetermined position of an existing box 1 that needs repair. Thereafter, a crane (not shown) is installed on the ground surface close to the shaft of the box 1 (step 1).

  And as a compressor carrying-in process, the compressor A is lifted with this crane, and this compressor A is carried into the box 1 from a shaft. Thereafter, the compressor A is manually pushed to move to the vicinity of the installation start position which is a predetermined position in the box 1 (step 2).

  After that, as a forklift carrying-in process, the forklift B is lifted by a crane, the forklift B is carried into the box 1 from the vertical shaft, and the forklift runs on the inner side surface 3 of the bottom 2 in the box 1. Install as possible (step 3).

  Next, as a carry-in preparation step, the inner surfaces 29, 30 of the pair of side members 21, 22 of the precast member 11 of the precast member 11 face each other, and the bottom surfaces of the inner surfaces 29, 30 of the pair of side members 21, 22 The bottom member 13, the pair of side members 21, 22 and the top member 41 are each a bottom frame 52 and a pair of side portions so that the inner surfaces 17, 45 of the member 13 and the top member 41 face each other. A predetermined number of frame bodies 51 attached to and held by each of the frames 55 and 56 and the upper frame 65 are prepared (step 4).

  At this time, the hydraulic cylinders 57 and 58 of the frame body 51 are contracted by a compressor (not shown), and as shown in FIG. 2, the pair of side frames 55 and 56 are directed to the inner side as opposed sides. The distance between the pair of side members 21 and 22 fixed to the pair of side frames 55 and 56 is made smaller than the horizontal dimension in the box 1 To do.

  Thereafter, the hydraulic cylinder 64 of the frame body 51 is retracted by a compressor to move the upper frame 65 downward so that the upper frame 65 is positioned on the pair of side frames 55 and 56. The space between the upper surface member 41 and the bottom surface member 13 fixed to the upper frame 65 is made smaller than the height in the box 1 so that the frame body 51 can be carried into the box 1. To do.

  That is, the outer side surfaces 23 and 24 of each of the pair of side surface members 21 and 22 of the precast member 11 are formed in an arc shape corresponding to the horizontally opposed portions of the inner side surface 5 of the box 1. Further, the outer side surface 14 of the bottom member 13 of the precast member 11 corresponds to the lower part between the portions of the inner side surface 3 of the box 1 corresponding to the outer side surfaces 23 and 24 of the pair of side surface members 21 and 22. It is formed in a circular arc shape. Further, the outer side surface 42 of the upper surface member 41 of the precast member 11 corresponds to the upper portion between the portions of the inner side surface 5 of the box 1 corresponding to the outer side surfaces 23 and 24 of the pair of side surface members 21 and 22. It is formed in an arc shape.

  In this state, as a carrying-in process, the frame body 51 is lifted by a crane, and the frame body 51 is inserted into the box 1 from the shaft and then attached to the bottom frame 52 of the frame body 51. With the height position of the bottom member 13 moved above the inner side surface 3 of the bottom 2 of the box 1, the frame body 51 is transported in the box 1, and the inside of the bottom 2 in the box 1 is Install on side 3 (step 5).

  Next, as a transporting process, the forklift B installed in the box 1 is operated and the pair of forks C of the forklift B are inserted into the pair of lift cases 67 and 68 of the frame 51 and locked. Then, the fork C is lifted to lift the frame body 51 from the inner side surface 3 of the bottom 2 of the box 1.

  In this state, as shown in FIG. 3, the forklift B is operated to run on the inner side surface 3 of the bottom 2 of the box 1, and the frame body 51 lifted by the fork C of the forklift B is The precast member 11 attached to the frame body 51 is moved to the installation position of the precast member 11 (step 6).

  Next, as a bottom installation step, the fork C of the forklift B is lowered and the bottom member 13 of the precast member 11 attached to the frame body 51 inserted into the lift cases 67 and 68 is moved downward. The bottom member 13 is set on the inner side surface 3 of the bottom 2 of the box 1 and the bottom member 13 of the precast member 11 is set on the inner side 3 of the bottom 2 of the box 1. (Step 7).

  Thereafter, as the upper installation step, the forklift B is operated and moved rearward, and the pair of forks C of the forklift B are removed from the lift cases 67 and 68 of the frame body 51.

  Further, the compressor A previously loaded into the box 1 is connected to the hydraulic cylinder 64 of the frame body 51 and extended, and the upper frame 65 of the frame body 51 is moved upward, as shown in FIG. The distance between the upper surface member 41 and the bottom surface member 13 attached to the upper frame 65 is increased, and the outer surface 42 of the upper surface member 41 is used as the inner surface of the inner surface upper portion 6 of the peripheral surface portion 4 of the box 1. The upper surface member 41 is installed and installed on the inner side surface 5 of the inner surface upper portion 6 of the peripheral surface portion 4 of the box 1 (step 8).

  In this state, as a side part installation step, the compressor A is connected to the hydraulic cylinders 57 and 58 of the frame body 51 and extended to operate the side frames 55 and 56 of the frame body 51 respectively. The distance between the side members 21 and 22 attached to the side frames 55 and 56 is made larger than the distance at the time of the conveyance process by rotating toward the outside which is one side.

  Then, as shown in FIG. 1, the outer side surfaces 23 and 24 of the side members 21 and 22 are covered so as to face the inner side surfaces 5 of the inner surface side portions 7 and 8 of the peripheral surface portion 4 of the box 1. These side members 21 and 22 are installed and installed on the inner side surfaces 5 of the inner surface side portions 7 and 8 of the peripheral surface portion 4 of the box 1 (step 9).

  At this time, the respective mounting lower surfaces 25 and 26 of these side members 21 and 22 are overlapped and stacked on the respective mounting upper surfaces 16 of the bottom member 13, and the respective mounting upper surfaces 27 and 28 of these side members 21 and 22 are stacked. The upper surface member 41 is stacked and stacked on the respective mounting lower surfaces 43 and 44, and the upper surface member 41 is installed so as to be bridged between the mounting upper surfaces 27 and 28 of the pair of side surface members 21 and 22. The member 13, the pair of side surface members 21 and 22, and the upper surface member 41 are installed in a self-supporting state in the box 1 while being pressed against the inner side surfaces 3 and 5 of the box 1.

  In this state, as the frame removing step, the bottom frame 52, the pair of side frames 55, 56 and the upper frame 65 of the frame body 51 are respectively connected to the bottom member 13, the pair of side members 21, 22 and the top member 41. Remove from each.

  Next, the hydraulic cylinders 57, 58, 64 of the frame body 51 are sequentially retracted to turn the pair of side frames 55, 56 inward, and then the upper frame 65 is moved downward ( Step 10).

  Thereafter, as a frame unloading step, the frame body 51 is moved by the forklift B, the frame body 51 is unloaded from the box 1, and only the precast member 11 to which the frame body 51 is attached is the box. It is installed at a predetermined position in 1 (step 11).

  Next, as a continuous process, the precast member 11 that is separate from the precast member 11 is also loaded and installed in the above-described steps 5 to 11 and continuously connected to the precast member 11 installed in the box 1. The frame body 51 is removed from the precast member 11 and carried out of the box 1 (step 12).

  Then, as a grout injection step, with a predetermined number of precast members 11 continuously installed in the box 1, grout hoses are inserted into the through holes 18 of the respective precast members 11, and precast from these grout hoses. The grout is injected between the bottom surface member 13 of the member 11, the pair of side surface members 21, 22 and the outer side surfaces 14, 23, 24, 42 of the top surface member 41 and the inner side surfaces 3, 5 of the box 1, respectively. The bottom member 13, the pair of side members 21, 22 and the top member 41 are integrated and fixed to the inner surfaces 3, 5 of the box 1 (step 13).

  After this, the forklift B and the compressor A are unloaded from the box 1 as a carry-out process (step 14), and the shaft formed in the box 1 is closed as a shaft closing process (step 15). The repair work of box 1 is completed (step 16).

  As described above, according to the embodiment, the precast member 11 for covering and repairing the inner side surfaces 3 and 5 of the box 1 is composed of the bottom surface member 13, the pair of side surface members 21 and 22, The upper surface member 41 was divided and formed. Therefore, the bottom member 13, the pair of side members 21, 22 and the top member 41 are connected by the frame body 51 so that the distance between the pair of side members 21, 22 is smaller than the width of the box 1. At the same time, by making the distance between the bottom member 13 and the top member 41 smaller than the height in the box 1, each of the bottom member 13, the pair of side members 21, 22 and the top member 41 is once. Can be carried into Hakodate 1. Accordingly, it is possible to easily carry the precast member 11 constituted by the bottom surface member 13, the pair of side surface members 21 and 22, and the top surface member 41 into the box 1.

  Further, the pair of side frames 55 and 56 of the frame body 51 installed on the bottom member 13 of the precast member 11 can be rotated, and the side members 21 and 22 can be detached from the pair of side frames 55 and 56. The upper surface member 41 is detachably fixed to the upper frame 65 that can be moved up and down of the frame body 51, and each of the bottom surface member 13, the pair of side surface members 21, 22 and the upper surface member 41 is attached to the frame body 51. And removably connected.

  As a result, the pair of side frames 55 and 56 of the frame body 51 are rotated inward, and the upper frame 65 of the frame body 51 is moved downward. The bottom member 13, the pair of side members 21, 22 and the top member 41 can be carried into the box 1 at a time while maintaining the relative positional relationship between the side members 21 and 22 and the top member 41.

  Further, after the frame body 51 is carried into the box 1, the pair of side frames 55 and 56 of the frame body 51 are rotated outwardly, thereby the pair of side frames 55 and 56. Each of the side members 21 and 22 fixed to the inner surface 5 of each inner surface side portion 7 and 8 of the peripheral surface portion 4 of the box 1 can be installed. Further, by moving the upper frame 65 of the frame body 51 upward, the upper surface member 41 fixed to the upper frame 65 can be installed on the inner side surface 5 of the inner surface upper portion 6 of the peripheral surface portion 4 of the box 1.

  Therefore, the operation of installing the bottom member 13 at a predetermined position in the box 1, the turning operation of the pair of side frames 55, 56 of the frame body 51, and the raising operation of the upper frame 65 of the frame body 51 Thus, the bottom member 13 of the precast member 11 can be installed on the inner side surface 3 of the bottom 2 of the box 1, and the pair of side members 21 and 22 and the upper surface member 41 of the precast member 11 are respectively connected to the periphery of the box 1. It can be installed so as to cover the inner surface 5 of the surface part 4. Therefore, it is possible to easily install the pair of side surface members 21 and 22 and the upper surface member 41 on the inner surface 5 of the box 1.

  As described above, the precast member 11 composed of the bottom surface member 13, the pair of side surface members 21 and 22, and the top surface member 41 can be easily carried into the box 1, and the box 1 of the precast member 11 can be used. The installation work to the inner side surfaces 3 and 5 can be facilitated.

  Further, when the upper frame 65 of the frame body 51 is moved upward and then the pair of side frames 55, 56 of the frame body 51 are rotated outward, the pair of side frames 55, Each of the mounting lower surfaces 25 and 26 of the side members 21 and 22 fixed to 56 is placed and stacked on the mounting upper surface 16 of the bottom member 13, and the mounting of the side members 21 and 22 is also performed. Each of the placement upper surfaces 27 and 28 is installed so as to overlap the respective placement lower surfaces 43 and 44 of the upper surface member 41, and this upper surface member 41 bridges between the placement upper surfaces 27 and 28 of the pair of side surface members 21 and 22. Then, the pair of side members are self-supporting.

  Therefore, the bottom member 13, the pair of side members 21, 22 and the top member 41 are installed at predetermined positions in the box 1, and the bottom member 13, the pair of side members 21, 22 and the top member 41 When the inner side surfaces 3 and 5 of the box 1 are covered with each other, the precast member 11 constituted by the bottom surface member 13, the pair of side surface members 21 and 22 and the top surface member 41 is self-supporting, and this precast The member 11 is installed in the box 1 in a self-supporting state.

  Therefore, when the precast member 11 is installed in the box 1, in order to temporarily fix or position the pair of side members 21, 22 and the upper surface member 41 of the precast member 11 in the box 1. There is no need to support hanging. Therefore, the bottom member 13, the pair of side members 21, 22 and the top member 41 can be shifted and transported into the box 1 at a time without being assembled in advance, and the bottom member 13, the pair of side members 21, 22 And the installation work in the box 1 of the precast member 11 comprised by the upper surface member 41 can be made still easier.

  Further, the mounting upper surfaces 27 and 28 of the pair of side members 21 and 22 of the precast member 11 and the mounting lower surfaces 43 and 44 of the upper surface member 41 are respectively connected to the pair of side members 21 and 22 and the upper surface member 41. A flat surface inclined downward from the outer side surface 23, 24, 42 side toward the inner side surface 29, 30, 45 side was used. As a result, after the pair of side members 21 and 22 are installed on the bottom member 13, the mounting lower surfaces 43 and 44 of the upper surface member 41 are mounted on the mounting upper surfaces 27 and 28 of the pair of side members 21 and 22, respectively. When the upper surface member 41 is installed by bridging between the pair of side surface members 21 and 22, the upper surface member 41 is placed on the outer surface on the mounting upper surfaces 27 and 28 by the weight of the upper surface member 41. The force suitable for is applied.

  Therefore, based on the weight of the upper surface member 41, the pair of side surface members 21 and 22 can be pressed against the inner surface 5 of the box 1, and the side surface members 21 and 22 are moved toward the inner surface 29 and 30 side. It can prevent falling. At the same time, the side members 21 and 22 can be prevented from falling to the inner side surfaces 29 and 30 by the weight of the upper surface member 41 based on the weight of the side members 21 and 22, respectively. The falling to the inner side surfaces 29 and 30 side can be prevented efficiently, and the pair of side surface members 21 and 22 can be more easily made independent.

  Further, the mounting lower surfaces 25 and 26 of the pair of side members 21 and 22 and the mounting upper surface 16 of the bottom member 13 are respectively connected to the inner surfaces 17 and 29 of the bottom member 13 and the pair of side members 21 and 22, respectively. A flat surface inclined downward from the 30 side toward the outer surface 14, 23, 24 side was used. As a result, the mounting lower surfaces 25 and 26 of the pair of side members 21 and 22 are placed on the mounting upper surface 16 of the bottom member 13, and then the upper surface member is interposed between the pair of side members 21 and 22. When 41 is installed while being bridged, an outwardly directed force is applied to the mounting lower surfaces 25 and 26 which are the lower ends of the pair of side members 21 and 22.

  Therefore, the pair of side members 21 and 22 can be pressed against the inner surface 5 of the box 1 based on the weights of the upper surface member 41 and the side members 21 and 22. It can be prevented from falling to the 29,30 side. For this reason, it is possible to efficiently prevent the side members 21 and 22 from falling into the inner side surfaces 29 and 30 and to make the pair of side members 21 and 22 more easily independent. Therefore, since the state where the precast member 11 is self-supporting can be easily ensured, the work of making the precast member 11 self-supporting can be facilitated.

  In the above embodiment, the existing box 1 having a substantially circular vertical cross section has been described. However, the shape of the vertical cross section of the box 1 is not particularly limited, and a vertical cross section such as a square or rectangle other than a circle is used. Even if it is a shape, it can be used correspondingly.

  In addition, a pair of side members 21 and 22 are rotatably connected to the bottom member 13 in the frame body 51, and a top member 41 is connected to the bottom member 13 so as to be movable up and down. While maintaining the relative positional relationship between the side members 21 and 22 and the top member 41, the bottom member 13, the pair of side members 21 and 22 and the top member 41 are carried into the box 1 at a time. The bottom member 13, the pair of side members 21, 22 and the top member 41 may be connected in any configuration as long as they can be installed.

It is explanatory drawing which shows the installation state of the culvert member of this invention. It is explanatory drawing which shows the carrying-in state of a culvert member same as the above. It is explanatory drawing which shows the carrying-in state of a culvert member same as the above. It is explanatory drawing which shows the installation state of a culvert member same as the above. It is a flowchart which shows the repair method using a culvert member same as the above.

Explanation of symbols

1 Box as a tube 3,5 Inner surface
11 Precast members as culvert members
13 Bottom member
16 Mounting surface, which is the installation surface as the mounting part
21,22 Side member
23,24 exterior
25,26 Mounting bottom surface as mounting surface
27,28 Placement surface as installation surface
29,30 inner surface
41 Top member
42 Outside
43,44 Mounting bottom surface as mounting surface

Claims (5)

A pair of side members each having a circular arc cross section;
An upper surface member having an arcuate cross section that is placed between the pair of side surface members and that independently supports the pair of side surface members with the center sides of the arcuate arcs of the pair of side surface members facing each other. A culvert member characterized by The pair of side members are formed on the side edges on the side where the upper surface members in the width direction of the pair of side members are placed, and the installation surfaces are inclined downward toward the center side of the pair of side members,
2. The culvert member according to claim 1, wherein the upper surface member has a mounting surface inclined downward toward the inside of the upper surface member at both side edges in the width direction of the upper surface member. The mounting portions on which the pair of side surface members are mounted are provided on both side edges in the width direction, respectively, and a substantially plate-shaped bottom surface member for installing the pair of side surface members on the mounting portions is provided. The culvert member according to claim 1 or 2. The pair of side members has a mounting surface that is inclined upward toward the center side of the pair of side members at the side edge of the pair of side members that is installed on the bottom surface member in the width direction. And
The culvert member according to claim 3, wherein the bottom surface member has an installation surface that is inclined upward toward the inside of the bottom surface member on the mounting portion of the bottom surface member. 5. The culvert member according to claim 1, wherein the pair of side surface members and the upper surface member are installed in a tubular body having an inner surface corresponding to the outer surfaces of the pair of side surface members and the upper surface member. .

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