JP2014047537A - Portal culvert structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portal culvert structure in which the weight of a portal calvert is reduced and the inside width (span) between right and left side walls is increased so that the portal culvert can three-dimensionally intersects a water channel or road wider than hitherto.SOLUTION: In an integrally molded portal culvert structure: a horizontal member 10 which is positioned within front and rear ends of left and right side walls when viewed from above, and has a member cross section where a longitudinal rib 12 is erected on the outside; each of left and right side wall members 20, 30 has a rectangular member cross section with each of boards 21, 31 connected with the horizontal member 10 via a corner part 40 on an inner side thereof, and is reduced in weight to widen an inner width (span) between the left and right side walls; the members are easily joined together in connecting construction work; and space-filling concrete 70 is placed between the longitudinal ribs 12, thus, the portal culvert structure can bear external force uniformly.

Description

  The present invention is a portal culvert constructed by three-dimensionally intersecting a waterway or a road, and reduces the weight of a precast concrete portal culvert in which a horizontal member and left and right side wall members are integrally molded, and the inner width (span) of the left and right side walls. This relates to a gate-shaped culvert structure that is widened.

  FIG. 17 is a perspective view constructed with a conventional portal culvert made of precast concrete, in which the lower left and right side walls in the front are omitted. A conventional portal culvert placed on the upper part of the left and right foundations F provided near the road ends where both sides of the road R are parallel to each other and three-dimensionally crossed is a member configuration of the horizontal member 1, the left side wall member 2 and the right side wall member 3. The corner 4 is formed integrally. All of the members have a plate-like rectangular cross section, and are connected to the upper surface of the horizontal member 1 with a joining means 5 at the time of connection with a cross-sectional defect.

  FIG. 18 is a schematic plan view in the case of a three-dimensional intersection. In FIG. 18A, both ends of the road R and the water channel W are parallel, the width is constant, and the distance at which the three-dimensional intersection intersects is shortest and orthogonal. In FIG. 18B, both ends of the road R and the water channel W are parallel and the width is constant, and the distance at which the three-dimensional intersection intersects is a diagonally long distance oblique to the right. In FIG. 18C, the width of one end of the road R or the water channel W is widened and the width changes, and the distance of the three-dimensional intersection increases and crosses with the change of the width. In FIG. 18 (d), the width of the road R or the water channel W is widened and the width is changed and increased, and the three-dimensional crossing distance is increased and the width intersects with the change of the width. In addition, although illustration is abbreviate | omitted, since the right-and-left side wall members 2 and 3 take a horizontal earth pressure as a surface, they deflect to the angle along the both ends of the road R and the waterway W under the crossing which are planarly viewed. Accompany.

  When designing the portal culvert, it is often designed according to the inner width distance (span) between the left side wall member 2 and the right side wall member 3, that is, the width of the road R or the water channel W. When the width of the road R is wider than before, when the width of the road R changes and becomes wider, or when the width of the road R has to be widened by a lane for topographical reasons such as height difference (not shown), Although it is necessary to widen the inner width (span) of the left and right side walls, there are many cases that cannot be dealt with due to the total weight of the portal culvert. In many cases, the factors are limited by equipment and mechanical factors such as a factory crane capacity in the molding process, a vehicle transport capacity in the transportation process, and a crane capacity in the field in the construction process.

  In addition, when the road R has a so-called oblique angle that is three-dimensionally crossed obliquely rightward or leftward in plan view, the width of the road R needs to be handled as an oblique width having a long distance. . In this case, it is necessary to deflect the left and right side wall members 2 and 3 in plan view along the road R together with the equipment and mechanical factors described above, which is restricted by equipment factors in the molding process. In addition, when the width of the road R changes and becomes wider, it is necessary to deflect the angle along the road R in the same manner.

  Furthermore, although not shown in the drawings, when turning right or left immediately after crossing at a three-dimensional intersection, it is necessary to install a corner-cut type portal culvert that considers the difference between the inner and rear wheels. . The corner-corresponding type here means a portal culvert in which the left and right side wall members 2 and 3 in plan view are deflected in a trumpet shape at the front and rear end portions of the portal culvert that has been continuously installed. It was necessary to design on the assumption that it spreads in a shape, and it was limited by the above factors.

  However, in the case of a three-dimensional intersection as the oblique angle, when the width of the road R changes and becomes wider, or when it becomes a trumpet in plan view, the left and right side wall members 2 and 3 in plan view are deflected to an arbitrary angle. It is necessary to integrally mold along the road R and waterway W under the three-dimensional intersection, but for the problem in this molding process, the present applicant solved the problem by proposing the formwork at the time of manufacturing ( Patent Documents 3 and 4) increase the inner width of the portal culvert and integrally mold it, or increase the inner width of the portal culvert and deflect the left and right side wall members 2 and 3 at an arbitrary angle. Therefore, there was a problem in integrally molding.

JP 2004-218372 A JP 2002-70135 A JP 2004-142159 A JP 2006-51744 A

  An object of the present invention is to reduce the weight and widen the inner width (span) of the left and right side walls, and each member constituting the monolithic precast concrete portal culvert is formed into a plate-like shape without impairing the cross-sectional performance. To reduce the weight by changing from a rectangular cross-sectional shape to a vertical rib-shaped cross-sectional shape, and to provide a portal culvert structure that does not hinder the molding process, transportation process, and construction process even if the inner width of the left and right side walls is increased. It is. In addition, a portal culvert that does not pose a problem even if it crosses diagonally in plan view and widens the inner width of the left and right side walls obliquely and deflects the left and right side walls at an arbitrary angle along the road or waterway under the three-dimensional intersection. Is to provide a structure. In addition, by providing a portal culvert structure that increases the inner width of the left and right side walls by reducing the weight by changing the vertical height of the inner surfaces of the left and right side wall members even in places where roads and waterways are widened due to local topographical factors. is there. Another object of the present invention is to provide a portal culvert structure in which the bending rigidity is increased by utilizing the tension of the PC steel material provided in the cross section of the horizontal member, and the inner width of the left and right side walls is increased. Furthermore, it is to provide a portal culvert structure provided with means that can be easily joined to the space between the longitudinal ribs at the time of continuous construction, and provided with means for uniformly burdening external force even after the continuous construction.

  In the first aspect of the present invention, as means for solving the above-described problem, the right and left vertical side wall members and the horizontal member, which are placed on the foundations provided near the both ends of the water channel or road for the purpose of three-dimensionally intersecting the water channel or road, form a corner. The horizontal member is a member cross-section in which the vertical ribs are erected on the outside and located within the front and rear end portions of the left and right side walls in plan view, and the left and right side wall members Is a rectangular member cross section with the horizontal member and the plate through the corners on the inside or a member cross section with the plate on the inside and the vertical ribs of the horizontal member on the outside and the protruding corner, and the left and right side walls The portal culvert structure is characterized in that the inner width (span) is expanded and integrally molded.

  Further, in the second aspect of the present invention, as means for solving the above-mentioned problem, the plates of the left and right side wall members with respect to the longitudinal direction of the horizontal member in plan view are deflected to an arbitrary angle of clockwise or counterclockwise respectively. A gate-shaped culvert structure according to claim 1 is formed.

  Moreover, in Claim 3 of this invention, as a means to solve the said subject, the vertical height of the said right-and-left side wall member differs from each other, and it shape | molded by adding weight reduction, It is any 1 or 2 characterized by the above-mentioned. The portal culvert structure according to item 1 is formed.

  Further, in claim 4 of the present invention, as means for solving the above problem, the inner width of the left and right side walls is widened by increasing the bending rigidity using the tension of the PC steel material provided in the member cross section of the horizontal member. A gate-shaped culvert structure according to any one of claims 1 to 3 is formed.

  Further, in claim 5 of the present invention, as means for solving the above-mentioned problem, the horizontal member is provided with means for easily joining via a joining material after at least the left and right side wall members abut at the time of continuous construction. The gate-shaped culvert structure according to any one of claims 1 to 4 is configured.

  Further, in the sixth aspect of the present invention, as a means for solving the above problem, the external force is made uniform by placing the interstitial concrete in the space alternating between the longitudinal ribs after the continuous construction on the horizontal member. The gate-shaped culvert structure according to any one of claims 1 to 5, comprising means for bearing.

  As the mechanical characteristics of the cross section, if the cross section width in a rectangular cross section is b and the cross section height is h, the bending rigidity is proportional to the value of b multiplied by the square of h. In other words, the rib shape having a reduced cross-sectional width and a high cross-sectional height is most effective for bending rigidity and contributes most to weight reduction. Therefore, in order to reduce the weight of the portal culvert and widen the inner width (span) of the left and right side walls, the horizontal member of the portal culvert is changed to a plate-shaped rectangular cross section and positioned vertically in the front and rear ends of the left and right side walls. It is effective to have a member cross section in which the ribs stand on the outside. Here, the vertical rib includes a bowl shape, an L shape, and an I shape. In the case of a saddle type, the cross section is composed of a vertical rib web and a horizontal flange. The web bears the bending moment caused by the action of external force, and the portal culvert can be reduced in weight. When placing concrete, it has the effect of functioning as a formwork. In the case of the L shape, in addition to the effect of the saddle shape, there is an effect of omitting the stuffing operation at the end portion by installing it at the end portion when performing continuous construction on site. In the case of the I type, it is most effective for reducing the weight of the portal culvert. However, a separate form is required in place of the horizontal flange when placing concrete in between. Note that changing the cross-sectional shape and the like of the left and right side wall members as well as the horizontal member also contributes to weight reduction.

  In addition, the lightweight portal culvert increases the inner width (span) by extending the horizontal member within the range that is not restricted by equipment and mechanical factors in the molding process, transportation process, construction process, etc. There is an effect that it is possible to erection at three-dimensional intersection even in a place where the road width is wider than before.

  In addition, for the wider width than the conventional width which obliquely crosses roads and waterways obliquely, the left and right side wall members are deflected at an arbitrary angle clockwise or counterclockwise with respect to the horizontal member longitudinal direction in plan view, There is an effect that the portal culvert, which is reduced in weight and the inner width (span) of the left and right side walls is integrally formed, can be installed along a road or waterway under a three-dimensional intersection.

  In addition, the portal culvert, which has been reduced in weight while widening the inner width (span) of the left and right side walls by deflecting the left and right side wall members in plan view in a trumpet shape, can be turned left or right immediately after crossing three-dimensionally. There is an effect that it is possible to provide a corner cut that sufficiently corresponds to the inner ring difference between the front and rear wheels.

  In addition, even if the width has to be widened for topographical reasons such as local height differences, the inner height (span) of the left and right side walls is reduced by reducing the weight by changing the vertical height of the inner surfaces of the left and right side wall members. It is possible to provide a portal culvert with a wider width.

  Furthermore, the vertical ribs are set up outside as a horizontal member at the time of continuous construction, making it possible to easily join through the bonding material using the space between the vertical ribs, and even after the continuous construction, It is possible to bear external force uniformly by placing the interstitial concrete, and if it is constructed with a portal culvert that is integrally molded with the inner width of the left and right side walls widened, effects such as shortening the construction period and environmental considerations can be achieved is there.

1A and 1B are perspective views showing a portal culvert structure according to the present invention. FIG. 1A is a perspective view in which a horizontal member sectional shape is a bowl shape, and FIG. 1B is a perspective view in which a horizontal member sectional shape is an L shape. FIG. 1 (c) is a perspective view in which the horizontal member cross-sectional shape is I-shaped, FIG. 1 (d) is a perspective view in which the horizontal member cross-sectional shape is I-shaped and provided at the end, and FIG. 1 (e) is each member. FIG. 1F is a perspective view in which the cross-sectional shape of each member is an L shape. FIG. 2 is a plan view in which the plates of the left and right side wall members in plan view according to the present invention are deflected to an arbitrary angle in a clockwise direction or a counterclockwise direction, respectively. FIG. FIG. 2B is a plan view deflected clockwise, FIG. 2B is a plan view in which the horizontal member cross-sectional shape is bowl-shaped and the left side wall is deflected counterclockwise, and FIG. 2D is a plan view in which the right side wall is deflected counterclockwise and FIG. 2D is a plan view in which the horizontal member cross-sectional shape is I and the left and right side walls are deflected counterclockwise, and FIG. FIG. 2F is a plan view in which each member has a bowl shape and the left and right side walls are deflected clockwise. FIG. 2F is a plan view in which each member has a bowl shape and the left and right side walls are deflected counterclockwise. FIG. 3 is a cross-sectional view with different inner heights on the left and right side walls. FIG. 4 is an explanatory view including a PC steel material in a horizontal member cross section according to the present invention, FIG. 4A is a perspective view including a PC steel material in a horizontal member cross-sectional shape saddle shape, and FIG. 4 (a) is a sectional view of Ya, FIG. 4 (c) is a perspective view of a horizontal member sectional shape I having a curved PC steel material, and FIG. 4 (d) is a sectional view of Yb of FIG. 4 (c). FIG. FIG. 5 is an explanatory view of the joining method M1 in which the cross-sectional shape of the horizontal member is a bowl shape, FIG. 5 (a) is an enlarged cross-sectional view, and FIG. 5 (b) is an enlarged partial plan view of FIG. 6A and 6B are explanatory views of the joining method M1 in which the horizontal member sectional shape is I-shaped, FIG. 6A is an enlarged sectional view, and FIG. 6B is an enlarged partial plan view of FIG. 6A. 7A and 7B are explanatory views of the joining method M2 in which the horizontal member has a cross-sectional shape, FIG. 7A is an enlarged cross-sectional view, and FIG. 7B is an enlarged partial plan view of FIG. 7A. 8A and 8B are explanatory views of the joining method M2 in which the cross-sectional shape of the horizontal member is I, FIG. 8A is an enlarged cross-sectional view, and FIG. 8B is an enlarged partial plan view of FIG. FIG. 9 is an explanatory view of the joining method M3 in which the cross-sectional shape of the horizontal member is a bowl shape, FIG. 9 (a) is an enlarged cross-sectional view, and FIG. 9 (b) is an enlarged partial plan view of FIG. 9 (a). FIG. 10 is an explanatory view of the joining method M3 in which the horizontal member sectional shape is I-shaped, FIG. 10 (a) is an enlarged sectional view, and FIG. 10 (b) is an enlarged partial plan view of FIG. 10 (a). 11A and 11B are explanatory diagrams of the interlining method M4 in which the horizontal member sectional shape is a bowl shape, FIG. 11A is an enlarged sectional view, and FIG. 11B is an enlarged partial plan view of FIG. 11A. 12A and 12B are explanatory diagrams of the filling method M4 in which the horizontal member cross-sectional shape is I-shaped, FIG. 12A is an enlarged cross-sectional view, and FIG. 12B is an enlarged partial plan view of FIG. FIGS. 13A and 13B are explanatory diagrams of the filling method M5 in which the horizontal member cross-sectional shape is a bowl shape, FIG. 13A is an enlarged cross-sectional view, and FIG. 13B is an enlarged partial plan view of FIG. 14A and 14B are explanatory diagrams of the filling method M5 in which the horizontal member sectional shape is I-shaped, FIG. 14A is an enlarged sectional view, and FIG. 14B is an enlarged partial plan view of FIG. FIGS. 15A and 15B are explanatory views of the filling method M6 in which the horizontal member cross-sectional shape is a bowl shape, FIG. 15A is an enlarged cross-sectional view, and FIG. 15B is a vertical cross-section of FIG. 16A and 16B are explanatory diagrams of the filling method M6 in which the horizontal member cross-sectional shape is I-shaped, FIG. 16A is an enlarged cross-sectional view, and FIG. 16B is a vertical cross-section of FIG. It is the perspective view constructed with the conventional portal culvert. It is a schematic plan view in the case of a three-dimensional intersection. It is construction explanatory drawing using the portal culvert concerning the present invention.

  FIG. 1 is a perspective view showing a portal culvert structure according to the present invention, which is composed of a horizontal member 10, a left side wall member 20, and a right side wall member 30. The horizontal member 10 is a plan view of left and right side wall members 20, 30. It is a member cross section in which the vertical ribs 12 are erected on the outer side and located within the front and rear end portions, and the left and right side wall members 20 and 30 are the rectangular member cross section or the inner side of the horizontal member 10 and the plates 21 and 31 through the corner portion 40 on the inner side. The plates 21 and 31 have a cross section of the vertical members 12 and 32 that are connected to the vertical ribs 12 of the horizontal member 10 on the outside, and the inner width of the left and right side walls is widened by reducing the weight of the portal culvert. The gate-shaped culvert structure integrally molded is described. FIG. 1A is a perspective view in which the horizontal member cross-sectional shape is a bowl shape. The horizontal member 10 is positioned at the approximate center of the left and right side wall members 20 and 30 in plan view, and the vertical ribs 12 are erected on the outside. The side wall members 20 and 30 are integrally formed with a plate-like rectangular cross-sectional shape, and the front and rear of the vertical ribs 12 of the horizontal member 10 are cut off to reduce the weight. FIG. 1B is a perspective view in which the horizontal member cross-sectional shape is L-shaped. The horizontal member 10 is positioned at one end of the left and right side wall members 20 and 30 in plan view, and the vertical ribs 12 are erected on the outer side. The members 20 and 30 are integrally formed with a plate-like rectangular cross-sectional shape, and lighten by cutting off one side of the vertical rib 12 of the horizontal member 10. FIG. 1C is a perspective view in which the horizontal member cross-sectional shape is I-shaped. The horizontal member 10 is positioned at the approximate center of the left and right side wall members 20 and 30 in plan view, and the vertical ribs 12 are erected on the outside. The side wall members 20 and 30 are integrally formed with a plate-like rectangular cross-sectional shape, and are lightened as a girder in which the vertical ribs 12 of the horizontal member 10 are independent. FIG. 1 (d) is a perspective view in which the horizontal member has an I-shaped cross section and is provided at the end. The horizontal member 10 is positioned at one end of the left and right side wall members 20 and 30 in plan view, and the vertical ribs 12 stand outward. The left and right side wall members 20 and 30 are integrally formed with a plate-like rectangular cross-sectional shape, and the vertical ribs 12 of the horizontal member 10 are reduced in weight as a single girder. FIG. 1 (e) is a perspective view in which the cross-sectional shape of each member is a bowl shape. The horizontal member 10 is positioned substantially at the center of the left and right side wall members 20 and 30 in plan view, and the vertical ribs 12 are erected on the outside. The side wall members 20, 30 are integrally molded with the plates 21, 31 on the inner side and the outer side of the vertical ribs 12 of the horizontal member 10 at the outer corners, and are formed integrally with the cross section of the standing members 22, 32. The front and rear portions of the left and right side wall members 20 and 30 are cut off and the front and rear portions 22 and 32 of the left and right side wall members 20 and 30 are cut off to reduce the weight. FIG. 1F is a perspective view in which each member has an L-shaped cross section. The horizontal member 10 is positioned at one end of the left and right side wall members 20 and 30 in plan view, and the vertical ribs 12 are erected on the outside. The side wall members 20, 30 are integrally molded with the plates 21, 31 on the inner side and the outer side of the vertical ribs 12 of the horizontal member 10 at the outer corners, and are formed integrally with the cross section of the standing members 22, 32. 12 is cut off and one side of the standing portions 22 and 32 of the left and right side wall members 20 and 30 is cut off to reduce the weight.

  FIG. 2 is a plan view in which the plates of the left and right side wall members in plan view according to the present invention are deflected to arbitrary angles in the clockwise direction or the counterclockwise direction, respectively, and FIG. 1 (a), FIG. 1 (c), FIG. 1) describes a portal culvert structure in which the plates 21 and 31 of the left and right side wall members 20 and 30 of the portal culvert described in FIG. 1 are deflected to an arbitrary angle in a clockwise or counterclockwise direction. ), And the portal culvert described in FIG. 2A is a plan view in which the horizontal member has a bowl-shaped cross section and the right side wall is deflected clockwise. The plate 21 of the left side wall member 20 is stationary at a right angle with respect to the longitudinal direction of the horizontal member 10. FIG. This corresponds to the case where the plate 31 of the wall member 30 is integrally formed with a portal culvert deflected at an arbitrary angle in the clockwise direction, and one side of the road is widened and widened. 2B is a plan view in which the horizontal member has a bowl-shaped cross section and the left side wall is deflected counterclockwise. The plate 21 of the left side wall member 20 is arbitrarily counterclockwise with respect to the longitudinal direction of the horizontal member 10. FIG. This corresponds to a case in which a portal culvert that is deflected to an angle and the plate 31 of the right side wall member 30 is stationary at a right angle is integrally formed, and one side of the road is widened and widened as described above. 2C is a plan view in which the horizontal member has an I-shaped cross section, the left side wall is clockwise, and the right side wall is deflected counterclockwise. The plate 21 of the left side wall member 20 with respect to the longitudinal direction of the horizontal member 10 is shown in FIG. Is formed by integrally forming a trumpet-shaped gate-shaped culvert in a plan view in which the plate 31 of the right side wall member 30 is deflected at an arbitrary angle in the counterclockwise direction, and both sides of the road are widened and widened. It corresponds also to become. FIG. 2D is a plan view in which the horizontal member has an I-shaped cross section and the left and right side walls are deflected counterclockwise. The plates 21 and 31 of the left and right side wall members 20 and 30 are arranged in the longitudinal direction of the horizontal member 10. Each gate-shaped culvert deflected to an arbitrary angle in the counterclockwise direction is integrally molded, and this corresponds to the case where three-dimensional crossing is performed obliquely. FIG. 2E is a plan view in which each member has a bowl shape and the left and right side walls are deflected clockwise. The plates 21 and 31 of the left and right side wall members 20 and 30 are respectively shown in the longitudinal direction of the horizontal member 10. A gate-shaped culvert deflected at an arbitrary angle in the clockwise direction is integrally molded, and it corresponds to the case of three-dimensional crossing diagonally. FIG. 2F is a plan view in which each member has a bowl shape and the left and right side walls are deflected counterclockwise. The plates 21 and 31 of the left and right side wall members 20 and 30 are arranged in the longitudinal direction of the horizontal member 10. Each gate-shaped culvert deflected to an arbitrary angle in the counterclockwise direction is integrally molded, and this corresponds to the case where three-dimensional crossing is performed obliquely. The left and right end portions or left and right protruding corner end portions of the horizontal member 10 in plan view are deflected in the same manner as the deflection of the plates 21 and 31 of the left and right side wall members 20 and 30, and are integrally molded.

  FIG. 3 is a cross-sectional view in which the inner heights of the left and right side walls are different. The difference in elevation between the left revetment WL and the right revetment WR in the waterway W is a local topographical factor. The foundation F on the left revetment WL side is located in the upper part, and the foundation F on the right revetment WR side is located in the lower part. The gate-shaped culvert placed on the foundation F having different left and right heights and three-dimensionally intersecting is different in the vertical height H1 of the inner surface of the left side wall member 20 and the vertical height H2 of the inner surface of the right side wall member 30 and adding weight reduction. The inner width (span) of the left and right side walls is widened and integrally molded. Although not shown in the drawings, the same applies to the case where there is a height difference at both ends of the road due to local topographical factors.

  FIG. 4 is an explanatory view provided with a PC steel material in the cross section of the horizontal member according to the present invention, explaining the portal culvert described in FIGS. 1 (a) and 1 (c), and FIG. 1 (b) and FIG. Illustrations of the portal culverts shown in FIGS. 1 (d) to 1 (f) are omitted. FIG. 4A is a perspective view in which a PC steel material is provided in a horizontal member cross-sectional shape saddle. A PC steel rod pb which is a PC steel material is provided in the horizontal member 10 and integrally molded. A portal culvert is described in which tension is applied during or after molding, and compressive stress is applied to the cross section of the horizontal member 10 to increase bending rigidity and further expand the inner width of the left and right side wall members 20 and 30. FIG. 4B is a Ya cross-sectional view of FIG. 4A, and increases bending rigidity in cooperation with a reinforcing bar (not shown) provided therein. FIG. 4C is a perspective view in which a PC steel material is curved in a horizontal member cross-sectional shape I shape, and a PC steel wire py, which is a PC steel material, is provided in the horizontal member 10 and integrally molded. Similar to FIG. 4A, a portal culvert is described in which the bending rigidity of the horizontal member 10 is increased and the inner widths of the left and right side wall members 20 and 30 are further increased. FIG. 4D is a Yb cross-sectional view of FIG. 4C, and uses bending to increase bending rigidity.

  5 to 10 show a joining method M1, a joining method in which at least the abutting portions 24, 34 of the left and right side wall members 20, 30 abut on the horizontal member 10 at the time of continuous construction, and are joined easily via a joining material. It is explanatory drawing provided with the joining means by M2, joining method M3. 1A and 1C will be described, and illustration of FIGS. 1B and 1D to 1F will be omitted. 5 (a) to 10 (a) omit the lower side of the left and right side wall members 20 and 30, and FIG. 5 (b) to FIG. . Hereinafter, FIG. 5 to FIG. 10 will be described.

  FIG. 5 is an explanatory view of the joining method M1 in which the cross-sectional shape of the horizontal member is a bowl shape, FIG. 5 (a) is an enlarged cross-sectional view, and FIG. 5 (b) is an enlarged partial plan view of FIG. The horizontal member 10 is joined to the horizontal member 10 via the box-like joining material 60 and the bolt 62 in the space sp between the vertical ribs 12 after the contact portions 24 and 34 of the left and right side wall members 20 and 30 are contacted. Joining is facilitated by providing an insert 50 internally threaded with a female screw. The flange 15 on the lower side of the vertical rib 12 abuts on the flange end portion 14 during continuous construction, and also serves as a formwork when placing the interstitial concrete 70 in the space sp after joining.

  6A and 6B are explanatory views of the joining method M1 in which the horizontal member sectional shape is I-shaped, FIG. 6A is an enlarged sectional view, and FIG. 6B is an enlarged partial plan view of FIG. 6A. The horizontal member 10 is joined to the horizontal member 10 via the box-like joining material 60 and the bolt 62 in the space sp between the vertical ribs 12 after the contact portions 24 and 34 of the left and right side wall members 20 and 30 are contacted. Joining is facilitated by providing an insert 50 internally threaded with a female screw. In the space sp after joining, a folded concrete deck plate 61 supported by the joining material 60 can be laid and the interstitial concrete 70 can be placed.

  7A and 7B are explanatory views of the joining method M2 in which the horizontal member has a cross-sectional shape, FIG. 7A is an enlarged cross-sectional view, and FIG. 7B is an enlarged partial plan view of FIG. 7A. Through holes 52 are provided in the vertical ribs 12 of the horizontal member 10 and joined to the through holes 52 between the adjacent vertical ribs 12 after the contact portions 24 and 34 of the left and right side wall members 20 and 30 are in contact with each other during construction. The screw member 63 is inserted, and the base 64 and the nut n enable the joining. As in FIG. 5, the flange 15 below the vertical rib 12 abuts at the flange end 14 at the time of continuous construction, and at the time of placing the interstitial concrete 70 in the space sp after joining. Take the role of a frame.

  8A and 8B are explanatory views of the joining method M2 in which the cross-sectional shape of the horizontal member is I, FIG. 8A is an enlarged cross-sectional view, and FIG. 8B is an enlarged partial plan view of FIG. As in FIG. 7, a through hole 52 is provided in the vertical rib 12 of the horizontal member 10, and between the adjacent vertical ribs 12 after the contact portions 24, 34 of the left and right side wall members 20, 30 are in contact during construction. The screw member 63 for joining is inserted into the through hole 52 and the joining is possible by the base 64 and the nut n. In addition, the interstitial concrete 70 can be hooked and placed in the space sp after joining by the notch 54 at the upper part of the vertical rib 12 of the horizontal member 10.

  FIG. 9 is an explanatory view of the joining method M3 in which the cross-sectional shape of the horizontal member is a bowl shape, FIG. 9 (a) is an enlarged cross-sectional view, and FIG. 9 (b) is an enlarged partial plan view of FIG. 9 (a). On the left and right sides of the vertical ribs 12 of the horizontal member 10, the bonding ribs 56 in which the bonding boxes 58 are embedded are integrally molded, and the contact portions 24, 34 of the left and right side wall members 20, 30 are in contact with each other at the time of continuous installation. After that, the joining is made easy in the adjacent joining box 58 via the bolt 62 and the nut n. As in FIG. 5, the flange 15 below the vertical rib 12 abuts at the flange end 14 at the time of continuous construction, and at the time of placing the interstitial concrete 70 in the space sp after joining. Take the role of a frame. The joining box 58 is filled with a filling mortar 72.

  FIG. 10 is an explanatory view of the joining method M3 in which the horizontal member sectional shape is I-shaped, FIG. 10 (a) is an enlarged sectional view, and FIG. 10 (b) is an enlarged partial plan view of FIG. 10 (a). On the left and right sides of the vertical ribs 12 of the horizontal member 10, the bonding ribs 56 in which the bonding boxes 58 are embedded are integrally molded, and the contact portions 24, 34 of the left and right side wall members 20, 30 are in contact with each other at the time of continuous installation. After that, the joining is made easy in the adjacent joining box 58 via the bolt 62 and the nut n. In addition, in the space sp after joining, it is also possible to lay the interstitial concrete 70 by laying a folded plate-like deck plate 61 supported on the upper surface of the joining rib 56. The joining box 58 is filled with a filling mortar 72.

  FIGS. 11 to 16 show that the horizontal member 10 has the interspaced space sp alternately between the vertical ribs 12 after the construction, and the interstitial concrete M4, the interstitial method M5, the interstitial method M6. It is explanatory drawing provided with the means to bear external force uniformly by driving 70. FIG. 1A and 1C will be described, and illustration of FIGS. 1B and 1D to 1F will be omitted. 11 (a) to 16 (a) omit the lower side of the left and right side wall members 20 and 30, and FIGS. 11 (b) to 14 (b) take out the intermediate portion of the horizontal member 10. FIG. . Hereinafter, FIGS. 11 to 16 will be described.

  11A and 11B are explanatory diagrams of the interlining method M4 in which the horizontal member sectional shape is a bowl shape, FIG. 11A is an enlarged sectional view, and FIG. 11B is an enlarged partial plan view of FIG. 11A. Fixing reinforcing bars 55 are protruded and embedded in the vertical ribs 12 of the horizontal member 10, and fixing auxiliary reinforcing bars 65, 66 are arranged in the space sp between the vertical ribs 12 after the continuous construction, and then the compacted concrete 70 is hit. It is installed and fixed integrally with the horizontal member 10, and the interstitial concrete 70 can be uniformly burdened with an external force by curing after undergoing a required curing. The flange 15 below the vertical rib 12 serves as a formwork when placing the interstitial concrete 70.

  12A and 12B are explanatory diagrams of the filling method M4 in which the horizontal member cross-sectional shape is I-shaped, FIG. 12A is an enlarged cross-sectional view, and FIG. 12B is an enlarged partial plan view of FIG. Similarly to FIG. 11, the fixing reinforcing bar 55 is protruded and embedded in the vertical rib 12 of the horizontal member 10, and the fixing auxiliary reinforcing bars 65 and 66 are arranged in the space sp between the vertical ribs 12 after the continuous construction. The interstitial concrete 70 is cast and integrated and fixed with the horizontal member 10, and the interstitial concrete 70 can be uniformly burdened with an external force by curing after undergoing a required curing. When the horizontal member cross-sectional shape is I-shaped, instead of the flange 15, the folded concrete deck plate 61 is bridged to the upper end portions 26, 36 of the left and right side wall members 20, 30 and the interstitial concrete 70 is placed.

  FIGS. 13A and 13B are explanatory diagrams of the filling method M5 in which the horizontal member cross-sectional shape is a bowl shape, FIG. 13A is an enlarged cross-sectional view, and FIG. 13B is an enlarged partial plan view of FIG. An insert 51 threaded with a female screw is embedded in the vertical rib 12 of the horizontal member 10, and a fixing bolt 62 having a long neck is protruded into a space sp between the vertical ribs 12 after continuous installation. After inserting the fixing auxiliary reinforcing bar 65, the interstitial concrete 70 is cast and integrated with the horizontal member 10 and fixed. The interstitial concrete 70 is cured after being subjected to the required curing, so that external force is applied. It can be borne uniformly. The flange 15 below the vertical rib 12 serves as a formwork when placing the interstitial concrete 70.

  14A and 14B are explanatory diagrams of the filling method M5 in which the horizontal member sectional shape is I-shaped, FIG. 14A is an enlarged sectional view, and FIG. 14B is an enlarged partial plan view of FIG. As in FIG. 13, an insert 51 threaded with a female screw is embedded in the vertical rib 12 of the horizontal member 10, and a fixing bolt having a long neck below the space sp between the vertical ribs 12 after the continuous installation is performed. 62 is screwed in a projecting state, and the fixing auxiliary reinforcing bar 65 is disposed, and then the interstitial concrete 70 is placed and fixed integrally with the horizontal member 10, and the interstitial concrete 70 is subjected to the necessary curing. The external force can be uniformly borne by curing. In the same manner as in FIG. 12, when the horizontal member cross-sectional shape is I-shaped, instead of the flange 15, folded plate-like deck plates 61 are bridged to the upper end portions 26, 36 of the left and right side wall members 20, 30 to form the interstitial concrete 70. To cast.

  FIGS. 15A and 15B are explanatory views of the filling method M6 in which the horizontal member cross-sectional shape is a bowl shape, FIG. 15A is an enlarged cross-sectional view, and FIG. 15B is a vertical cross-section of FIG. In the space sp between the vertical ribs 12 of the horizontal member 10, axial rebars 68 and stirrup rebars 69 equivalent to the vertical ribs 12 are arranged, and the upper ends 26 and 36 of the left and right side wall members 20 and 30 are arranged in the space sp. In order to fix and support both ends of the beam formed by placing the interstitial concrete 70, a supporting reinforcing bar 59 is embedded and protrudes. The beam in the space sp has a role of uniformly bearing an external force in addition to the function of filling. As in FIG. 11, the flange 15 on the lower side of the vertical rib 12 serves as a formwork when placing the interstitial concrete 70.

  16A and 16B are explanatory diagrams of the filling method M6 in which the horizontal member cross-sectional shape is I-shaped, FIG. 16A is an enlarged cross-sectional view, and FIG. 16B is a vertical cross-section of FIG. Similarly to FIG. 15, in the space sp between the vertical ribs 12 of the horizontal member 10, axial reinforcing bars 68 and stirrup reinforcing bars 69 equivalent to the vertical ribs 12 are arranged, and the upper end portions 26 of the left and right side wall members 20, 30 are arranged. In FIG. 36, a fixing reinforcing bar 59 for support is embedded and protruded in order to fix and support both ends of a beam formed by placing the interstitial concrete 70 in the space sp. The beam in the space sp has a role of uniformly bearing an external force in addition to the function of filling. In addition, in the upper part of the inner surfaces 21 and 31 of the left and right side wall members 20 and 30, an insert 51 screwed with a female screw is embedded, a receiving angle 67 is fixed with a bolt 62, a folded plate-like deck plate 61 is bridged, Placing the interstitial concrete 70.

  FIG. 19 is an explanatory diagram of construction using the portal culvert according to the present invention. The lower left and right side walls in front are omitted. A portal culvert made of precast concrete, in which left and right side wall members 20 and 30 placed on a foundation F provided near both ends of a road R and a horizontal member 10 are integrally formed with a corner 40, and are horizontal The member 10 has a bowl-shaped cross-sectional shape in which the vertical ribs 12 are erected on the outer side and located substantially in the center of the left and right side walls in plan view. The weight of the portal culvert is reduced and the inner width (span) of the left and right side walls is increased. It is constructed in a continuous manner with an integrally molded portal culvert structure. In the rear side of the continuous arrangement, the interstitial concrete 70 is placed in the space between the vertical ribs 12, and the external force can be uniformly applied. It should be noted that illustrations such as a joining method, a case where a three-dimensional intersection is oblique, and a case where both sides of the road R are not parallel are omitted.

DESCRIPTION OF SYMBOLS 1 Horizontal member of conventional portal culvert 2 Left wall member of conventional portal culvert 3 Right wall member of conventional portal culvert 4 Corner portion of conventional portal culvert 5 Joining means of conventional portal culvert 10 Horizontal member DESCRIPTION OF SYMBOLS 12 Vertical rib 14 Flange contact part 15 Flange 20 Left side wall member 21 Plate of left side wall member 22 Vertical rib of left side wall member 24 Contact part of left side wall member 25 Flange of left side wall member 26 Upper end part of left side wall member 30 Right side wall member 31 Plate of right side wall member 32 Vertical rib of right side wall member 34 Abutting part of right side wall member 35 Flange of right side wall member 36 Upper end part of right side wall member 40 Corner 50 Insert 51 Insert 52 Through hole 54 Notched 55 Fixing rebar 56 Joining rib 57 Joining rib abutment 58 Joining box 59 Supporting rebar 60 Joining material 61 Deck play 62 bolt 63 threadedly 杆材 64 pedestal 65 fixing auxiliary reinforcing bar 66 the auxiliary fixing reinforcement 67 receives angle 68 longitudinal bar 69 stirrup between reinforcing bars 70 filling concrete 72 between the filling mortar F basis H1 vertical height (the left side wall inner surface)
H2 vertical height (inside of right side wall)
M1 joining method M2 joining method M3 joining method M4 spacing method M5 spacing method M6 spacing method n Nut pb PC steel bar py PC steel wire R road sp space W waterway WL left revetment WR right revetment

Claims (6)

It is a portal culvert structure made of precast concrete in which left and right vertical side wall members and horizontal members placed on the foundation provided near the both ends of the road for the purpose of three-dimensionally crossing a waterway or road are integrally formed with a corner. There,
The horizontal member is a member cross section that is located within the front and rear end portions of the left and right side walls in plan view, and the vertical ribs are erected on the outside. The gate is characterized in that it is a plate section that is erected on the outside with a vertical rib of the horizontal member on the outside, and the portal culvert is lightened and the inner width of the left and right side walls is widened and integrally molded Calvert structure.   2. The portal culvert structure according to claim 1, wherein the plates of the left and right side wall members with respect to the longitudinal direction of the horizontal member in plan view are deflected at an arbitrary angle clockwise or counterclockwise.   3. The portal culvert structure according to claim 1, wherein the vertical heights of the inner surfaces of the left and right side wall members are different from each other, and are molded with weight reduction.   The gate according to any one of claims 1 to 3, wherein the inner width of the left and right side walls is widened by increasing the bending rigidity by using the tension of the PC steel provided in the cross section of the horizontal member. Shape culvert structure.   The said horizontal member was equipped with the means easily joined via a joining material after the said left-and-right side wall member contact | abutted at least at the time of continuous construction, The any one of the Claims 1 thru | or 4 characterized by the above-mentioned. Portal culvert structure.   6. The horizontal member is provided with means for uniformly burdening an external force by placing interstitial concrete in a space alternating between vertical ribs after continuous construction. The portal culvert structure according to any one of the above.

Images