JP2006225947A - Construction method of bank section and the bank section - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of a bank section capable of shortening a section and a period stopping the traffic and carrying out construction without complicated work and the bank section. <P>SOLUTION: A box-like body 7 is constructed on the ground 1, and a precast block 29 is placed in the side of the body 7. Temporary anchoring reinforcements 27 fixed to an alignment face 23 of the body 7 at predetermined intervals and temporary anchoring reinforcements 45 opposed to the temporary anchoring reinforcements 27 and fixed to an alignment face 39 of the precast block 29 are combined with each other by making use of a mechanical joint 49. Then, bar steels are inserted in spaces 65 of overlapping parts of permanent anchoring reinforcements 25 fixed to the alignment face 23 of the body 7 in parallel with the temporary anchoring reinforcements 27 and permanent anchoring reinforcements 41 fixed to the alignment face 39 of the precast block 29 in parallel with the temporary anchoring reinforcements 45, and a part surrounded by the alignment face 23, the upper surface of a projected section 17 and the alignment face 39 is filled with a filling concrete 51 to combine the body 7 with the precast block 29. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a construction method for a banking portion and a banking portion.

  Conventionally, in order to eliminate a traffic jam at a plane intersection of a road, three-dimensional intersections have been performed by underpass or overpass. In the overpass method, (1) a method of shortening the construction period by supporting a girder with an elevating device attached to the edge of the girder and securing a working space above and below the girder (see, for example, Patent Document 1), etc. is there.

  According to the method of (1), the girder can be constructed while minimizing traffic interruption, but in order to build the entire three-dimensional intersection in a short construction period, a method of constructing the embankment in a short period is necessary. there were. Therefore, as a method of rapidly building the embankment part in combination with the method of (1), etc., (2) using a precast member, installing a pair of preceding side parts and filling back between the preceding side parts After forming the embankment part of the work zone part, the main side is installed outside the preceding side part, and the entire embankment part is completed by backfilling between the preceding side part and the main side part Has been proposed (see, for example, Non-Patent Document 1).

JP 2003-193405 A Rapid construction of multi-level intersection project in a narrow work zone by SEB-ANP method (58th Annual Conference of Japan Society of Civil Engineers VI-284)

  However, in the method (2), when installing the side part of the main building, it was necessary to close the road all day including the pavement. Moreover, night work of the widening part was required as a preparatory work.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a construction method and a banking part for a banking part that can be constructed without complicated work by shortening a section and a period of road closure. There is.

  1st invention for achieving the objective mentioned above is a process (a) which constructs a box-shaped main body on the ground, and a process (b) which arranges a flat precast member on the side of the main body. A first temporary fixing member provided at a predetermined interval on the side surface of the main body, and a second temporary fixing member provided on the side surface of the precast member so as to face the first temporary fixing member. A step (c) of integrating the member, a first main fixing member provided on the side surface of the main body in parallel with the first temporary fixing member, and the second main member on the side surface of the precast member. And a step (d) of integrating a second permanent fixing member provided in parallel with the temporary fixing member.

  The temporary fixing member used in the step (c) is, for example, the first temporary fixing member is a first steel bar having one end fixed to the side surface of the main body, and the second temporary fixing member has one end. It is the 2nd steel bar fixed to the side of the precast member. In this case, in the step (c), the other end of the first steel bar and the other end of the second steel bar are connected by a mechanical joint.

  The main fixing member used in the step (d) is, for example, the first main fixing member is a first U-shaped steel whose both ends are fixed to the side surfaces of the main body, and the second main fixing member is The second U-shaped steel, both ends of which are fixed to the side surfaces of the precast member. In this case, in the step (d), the third steel bar is disposed so as to pass through the inside of the first U-shaped steel and the inside of the second U-shaped steel, and between the side surface of the main body and the side surface of the precast member. Install interstitial concrete.

  A convex portion is provided below the first temporary fixing member and the first main fixing member on the side surface of the main body, and the second temporary fixing member and the second main fixing side on the side surface of the precast member. It is desirable to provide a notch below the member. In this case, a convex part and a notch part are fitted in a process (c).

2nd invention is the embankment part characterized by having been constructed by the construction method of the embankment part of 1st invention.
The embankment part of 2nd invention fixes the flat-shaped precast member to the side of a box-shaped main body. The main body and the precast member include a first temporary fixing member and a first main fixing member provided on the side surface of the main body at a predetermined interval, and a first temporary fixing member and a first member on the side surface of the precast member. The second temporary fixing member and the second main fixing member provided in opposition to the main fixing member are integrated.

  ADVANTAGE OF THE INVENTION According to this invention, the construction method and embankment part of a banking part which can shorten the section and period of a road stop, and can construct without a complicated operation | work can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view of a leading portion 2 constructed in advance among the embankment portion, and FIG. 2 is a perspective view of a part of the main body 7. FIG. 1A shows a cross-sectional view of a portion of the embankment that is constructed in advance. FIG. 1B is an elevation view seen from the direction of arrow A shown in FIG.

  In order to construct the embankment part, first, as shown in FIG. 1A, the ground 1 is excavated, the crushed stone 3 is laid, and the foundation 5 is constructed thereon. And after setting the main body 7 on the foundation 5 and filling the embedding material 9 in the main body 7, the pavement 11 is given to the upper surface, and the preceding part 2 is completed. The leading part 2 is constructed using a normal work zone on the road.

  As shown in FIGS. 1 and 2, the main body 7 has a box shape including a bottom surface 13 and a side surface 15. The side surfaces 15 are provided on two opposite sides of the bottom surface 13. The side surface 15 of the main body 7 has a convex portion 17 protruding outward near the upper end portion. The convex portion 17 is a flat plate-like member, and a chamfering material 61 is provided at a corner where the bottom surface 59 and the side surface 15 of the convex portion 17 are formed.

  The width of the side surface 15 is wider at the widened portion 57 above the convex portion 17 than at the lower portion of the convex portion 17. The outer surface of the widened portion 57 of the side surface 15 is used as a joint surface 23 with a precast block 29 (FIG. 4 and the like) described later. The reinforcing bar 19 is fixed to the joint surface 23.

  As shown in FIG. 1B, when constructing the embankment part, a plurality of main bodies 7 are arranged side by side. The main body 7 is constructed of cast-in concrete or precast concrete.

  FIG. 3 is a view showing the vicinity of the convex portion 17 of the main body 7. 3 (a) is a plan view of the side surface 15 of the main body 7 as viewed from above, FIG. 3 (b) is a cross-sectional view taken along line BB in FIG. 3 (a), and FIG. (C) The figure is sectional drawing by CC shown to (a) figure of FIG.

  As shown in FIG. 1B, FIG. 2, and FIG. 3A, the reinforcing bar 19 includes a main fixing reinforcing bar 25 and a temporary fixing reinforcing bar 27. The main fixing reinforcing bars 25 and the temporary fixing reinforcing bars 27 are arranged on the joint surface 23 of the main body 7 in a predetermined arrangement.

  The main reinforcing bar 25 is U-shaped steel, and both ends are fixed to the joint surface 23 (FIG. 2 and FIG. 3B). The temporarily fixing rebar 27 is a steel bar, and one end is fixed to the joint surface 23 (FIG. 2, (c) figure of FIG. 3). The temporarily fixing reinforcing bars 27 are arranged in two upper and lower stages (FIG. 1B, FIG. 2 and FIG. 3C).

  4 is a perspective view of the precast block 29, and FIG. 5 is a plan view and a cross-sectional view of the precast block 29. 5A is a plan view of the precast block 29 as viewed from above, FIG. 5B is a cross-sectional view taken along the line DD in FIG. 5A, and FIG. 5C. The figure is a cross-sectional view taken along line E-E shown in FIG.

  As shown in FIGS. 4 and 5 (a) and FIG. 5 (b), the main body 31 of the precast block 29 is formed on the end portion 55 of the flat road surface portion 35 from the upper surface 53 of the road surface portion 35. It is the shape which provided the starting part 37 of this.

  An end portion of the road surface portion 35 facing the end portion 55 is used as a joint surface 39 with the main body 7. A reinforcing bar 41 is fixed to the joint surface 39. A notch 33 is provided at a corner where the lower surface of the road surface portion 35 and the joint surface 39 are formed. The notch 33 is a groove having a rectangular cross section.

  As shown in FIG. 4 and FIG. 5C, the reinforcing bar 41 includes a main fixing reinforcing bar 43 and a temporary fixing reinforcing bar 45. The main fixing reinforcing bar 43 and the temporary fixing reinforcing bar 45 correspond to the arrangement of the main fixing reinforcing bar 25 and the temporary fixing reinforcing bar 27 fixed to the bonding surface 23 of the main body 7 on the bonding surface 39 of the precast block 29. Arranged in an array.

  The main reinforcing bar 43 is U-shaped steel, and both ends thereof are fixed to the joint surface 39 (FIGS. 4 and 5A). The temporarily fixing reinforcing bar 45 is a steel bar, and one end thereof is fixed to the joint surface 39 (FIGS. 4 and 5B). The temporarily fixing reinforcing bars 45 are arranged in two upper and lower stages (FIG. 4 and FIG. 5B).

  6 is a cross-sectional view of the completed embankment 63, FIG. 7 is a perspective view of the joint between the main body 7 and the precast block 29, and FIG. 8 is a plan view and a cross-section of the joint between the main body 7 and the precast block 29. FIG. 8A is a plan view of a joint portion between the main body 7 and the precast block 29, and FIG. 8B is a cross-sectional view taken along the line H-H shown in FIG. 8A.

  As shown in FIG. 1, after the leading portion of the embankment 63 is constructed, the notch 33 of the precast block 29 is fitted into the convex portion 17 of the side 15 of the main body 7 as shown in FIGS. 6 to 8. In addition, a precast block 29 is arranged on the side of the main body 7. In the steps after the arrangement of the precast block 29, the leading portion 2 can be provisionally used as a lane. Further, the space on the side of the leading portion 2 can be used as a work band.

  When the precast block 29 is arranged, as shown in FIGS. 7 and 8, the temporarily fixing rebar 27 and the main fixing rebar 25 fixed to the joint surface 23 of the main body 7 and the joint surface 39 of the precast block 29 are arranged. The temporarily fixed reinforcing bar 45 and the main fixing reinforcing bar 43 are opposed to each other, and the temporarily fixed reinforcing bar 27 and the temporarily fixed reinforcing bar 45 are integrated by a mechanical joint 49. Thereby, the precast block 29 is temporarily fixed to the main body 7 without installing a support work under the precast block 29. In addition, the precast block 29 is arrange | positioned by methods, such as lifting with the lifting machine installed in the precedence part 2, and lifting with the lifting machine installed on the ground 1 under the precast block 29. FIG.

  Next, the arrow shown in FIG. 8A is passed through the overlapping portion between the inside of the main reinforcing bar 25 and the inside of the main fixing bar 43, that is, the space 65 shown in FIG. 8B. Steel bars (not shown) are arranged in the direction indicated by G (arrow F shown in FIG. 7). Then, as shown in FIG. 6, the space between the joint surface 23 of the main body 7, the top surface of the convex portion 17, and the joint surface 39 of the precast block 29 is filled with the interstitial concrete 51 to form the widened portion 65. To do. Finally, a pavement 47 is applied to the upper surfaces of the precast block 29 and the padded concrete 51 to complete the embankment 63.

  Thus, according to the present embodiment, after constructing the leading portion 2 using a normal work band, the precast block 29 is attached to the side of the leading portion 2 to form the widened portion 65, and the embankment portion 63 is completed. To do. Thereby, construction of the widened portion 65 can be performed while temporarily using the leading portion 2 as a lane.

  Moreover, work efficiency can be improved by dividing and reducing the widening part 65 using the precast block 29, and performing construction. In addition, the number of temporary works for scaffolding and support work can be reduced as much as possible. Further, by using the temporarily fixing rebar 27 and the temporarily fixing rebar 45, the main fixing rebar 25 and the main fixing rebar 43, etc., the joining of the main body 7 and the precast block 29 can be easily and finely adjusted. .

  In addition, the shape of the convex part of a main body and a precast member is not restricted to what was shown to this Embodiment. For example, in this embodiment, as shown in FIG. 5 and the like, the lower surface of the precast block 29 is inclined, but the lower surface may be horizontal. Further, the shapes of the temporarily fixing reinforcing bars and the main fixing reinforcing bars are not limited to those shown in the present embodiment. These are only required to be able to easily connect the main body and the precast member and complete the embankment having sufficient strength.

  As mentioned above, although the construction method of the embankment part concerning this invention and suitable embodiment of a embankment part were demonstrated, referring an accompanying drawing, this invention is not limited to this example. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

Figure of the part of the embankment that will be constructed in advance Partial perspective view of the main body 7 The figure which shows the convex part 17 vicinity of the main body 7 Perspective view of precast block 29 Plan view and sectional view of precast block 29 Cross section of the completed embankment 63 The perspective view of the junction part of the main body 7 and the precast block 29 Plan view of the joint between the main body 7 and the precast block

Explanation of symbols

1 ......... Ground 2 ......... Previous part 7 ......... Main body 13 ......... Bottom 15 ......... Side 17 ......... Convex 19, 41 ......... Reinforcing bars 23, 39 ......... Joint surfaces 25, 43 ……… Reinforcing bar 27, 45 ……… Temporary fixing rod 29 ……… Precast block 31 ……… Main body 33 ……… Notch 49 ……… Mechanical joint 51 ……… Fixed concrete 63 ……… bank

Claims (5)

(A) constructing a box-shaped main body on the ground;
A step (b) of disposing a flat precast member on the side of the main body;
A first temporary fixing member provided on the side surface of the main body at a predetermined interval; and a second temporary fixing member provided on the side surface of the precast member so as to face the first temporary fixing member. Step (c) of integrating
A first main fixing member provided on the side surface of the main body in parallel with the first temporary fixing member, and a second main member provided on the side surface of the precast member in parallel with the second temporary fixing member. (D) integrating the main fixing member of
An embankment construction method characterized by comprising: The first temporary fixing member is a first steel bar having one end fixed to a side surface of the main body,
The second temporary fixing member is a second steel bar having one end fixed to a side surface of the precast member;
2. The embankment construction method according to claim 1, wherein in the step (c), the other end of the first steel bar and the other end of the second steel bar are connected by a mechanical joint. The first main fixing member is a first U-shaped steel having both ends fixed to side surfaces of the main body,
The second main fixing member is a second U-shaped steel having both ends fixed to side surfaces of the precast member,
In the step (d), a third steel bar is disposed so as to pass through the inside of the first U-shaped steel and the inside of the second U-shaped steel, and the side surface of the main body and the side surface of the precast member The method for constructing a banking portion according to claim 1, wherein the interstitial concrete is installed in between. A convex portion is provided on a side surface of the main body below the first temporary fixing member and the first main fixing member,
A notch is provided on the side of the precast member below the second temporary fixing member and the second main fixing member,
The embedding part construction method according to claim 1, wherein in the step (c), the convex part and the notch part are fitted together.   The embankment part constructed by the embankment part construction method according to claim 1.

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