JP2017203296A - Installation structure of concrete secondary product, and construction method of structure using concrete secondary product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a concrete secondary product to be installed stably even when the installation surface is an inclined surface.SOLUTION: An installation structure of a concrete secondary product includes: a concrete secondary product 1 having a fitting hole 11 formed on a bottom plate 12, the fitting hole oriented in a vertical direction when the concrete secondary product is installed on an inclined surface 40; a support member 2 inserted into the fitting hole 11 of the concrete secondary product 1 and supporting the concrete secondary product 1 in the vertical direction when installed on the inclined surface 40; and an installation base member 3 having an undersurface that inclines at an angle corresponding to the inclined surface 40 when the secondary concrete product is installed on the inclined surface 40, and a top surface functioning as a horizontal surface to support the support member 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a concrete secondary product laying structure for laying a concrete secondary product such as a box culvert on an inclined surface, and a method for constructing a structure using the concrete secondary product.

  Conventionally, construction of a structure for a waterway or a road is performed by transporting and laying a concrete secondary product manufactured in advance in a factory or the like to a construction site. When constructing concrete secondary products on site, a laying structure for that purpose is used.

FIG. 11 is a cross-sectional view showing a conventional concrete secondary product laying structure.
For example, as shown in FIG. 11, a conventional concrete secondary product laying structure is provided with a vertical mounting hole 53 in a bottom plate 52 serving as a laying surface of a concrete secondary product 51, and a support member 54 in the mounting hole 53. Is inserted. This support member 54 has a support bolt 55 that can change the amount of protrusion downward with its tip directed downward. Further, a laying base member 57 is installed on the foundation concrete 56 on which the concrete secondary product 51 is laid, and the tip of the support bolt 55 of the support member 54 is brought into contact with this upper surface.
The laying base member 57 is composed of two upper and lower plates and an antifriction material sandwiched between them, and the upper plate is horizontally movable with respect to the lower plate (see Patent Document 1).

In this concrete secondary product laying structure, the concrete secondary product 51 is supported by the support bolts 55 of the support member 54, and the concrete secondary product 51 is changed by rotating the support bolts 55 to change the downward protrusion amount. Adjust the height. Further, by horizontally moving the upper plate in the laying base member 57, the horizontal adjustment of the concrete secondary product 51 is performed.
Thereby, when laying a plurality of concrete secondary products 51, it is possible to join adjacent concrete secondary products 51 without shifting by adjusting the height of the concrete secondary products 51 or fine adjustment in the horizontal direction.

  When this concrete secondary product 51 laying structure is used, if the surface to be laid is a horizontal surface, the weight of the concrete secondary product 51 acts in the vertical direction, so that the laid concrete secondary product 51 moves. There is nothing. In addition, if the surface to be laid is an inclined surface having a small gradient of about 1 to 2%, the concrete secondary product 51 follows the inclined surface because the component force in the direction of the inclined surface of the weight of the concrete secondary product 51 is small. It wo n’t fall off.

  However, as the gradient of the inclined surface to be laid increases, the component force in the inclined surface direction of the weight of the concrete secondary product 51 increases. Therefore, if the component force of the weight of the concrete secondary product 51 in the direction of the inclined surface exceeds the frictional force on the inclined surface, the concrete secondary product 51 starts to move and slide down along the inclined surface.

  That is, when a plurality of concrete secondary products 51 are laid along the inclined surface from the lower side toward the upper side, the component force in the inclined surface direction of the weight of the concrete secondary product 51 is reduced to the concrete secondary product 51 on the lower side. Act on. The force received from the upper side in the concrete secondary product 51 is accumulated from the upper side to the lower side in the plurality of concrete secondary products 51 laid along the inclined surface. Therefore, the lower the concrete secondary product 51, the greater the force received from the upper side, and without falling through it, the concrete secondary product 51 slips down from the lower concrete secondary product 51 and collapses. The concrete secondary product 51 collapses.

Japanese Patent No. 4145155

  The present invention has been made to solve such problems, and its purpose is to incline the concrete secondary product even when the surface to be laid is an inclined surface. It is to be able to lay in a stable state on the surface.

  A first invention is a concrete secondary product laying structure for laying a concrete secondary product on an inclined surface, and when the concrete secondary product is laid on the inclined surface, the bottom plate includes a mounting hole that is in a vertical direction. When the concrete secondary product is inserted into the mounting hole of the concrete secondary product and laid on the inclined surface, the concrete secondary product is supported in the vertical direction, and the lower surface is laid on the inclined surface. A concrete secondary product laying structure having a laying base member that is inclined at an angle corresponding to the inclined surface and whose upper surface is a horizontal surface that supports the support member.

  A second aspect of the invention is a concrete secondary product laying structure according to the first aspect, wherein the support member is attached to an upper side of an attachment hole of the concrete secondary product and is laid on the inclined surface in a vertical direction. The upper bushing with the inner threaded part and the flange part parallel to the inclined surface, and the lower part of the mounting hole of the concrete secondary product, and when laid on the inclined surface, A lower bush having a threaded portion and a flange portion that is parallel to the inclined surface; and a support bolt that is screwed into an inner threaded portion of the upper bush and an inner threaded portion of the lower bush. This is a concrete secondary product laying structure in which the height of the concrete secondary product can be adjusted by changing the amount of protrusion downward by rotating the.

  The third invention is the laying structure of the secondary concrete product of the first or second invention, wherein when the laying base member is laid on the inclined surface, the lower surface is inclined at an angle corresponding to the inclined surface, An inclined plate whose upper surface is a horizontal plane, a flat fixed plate disposed on the inclined plate, and a flat slide plate disposed on the fixed plate, the slide plate being the fixed plate It is a laying structure of a concrete secondary product that can be finely adjusted in the horizontal direction of the concrete secondary product located on the upper part by moving horizontally with respect to.

  The fourth invention is the concrete secondary product laying structure according to the third invention, wherein the anti-friction material is disposed between the fixed plate and the slide plate of the laying base member. .

  A fifth invention is a method of constructing a structure using a concrete secondary product laid using the concrete secondary product laying structure according to any one of the first to fourth inventions, wherein a plurality of structures are formed on an inclined surface. The step of laying the concrete secondary product along the inclined surface, and after laying a plurality of concrete secondary products on the inclined surface, adjusting the height of the concrete secondary product by changing the protruding amount of the support bolt of the support member And / or by horizontally moving the slide plate of the laying base member to finely adjust the concrete secondary product in the horizontal direction, thereby joining adjacent secondary concrete products without shifting. This is a method for constructing a structure using a secondary concrete product for constructing a structure for a waterway or a road.

  According to the present invention, the concrete secondary product laid on the inclined surface is supported in the vertical direction by the support member, so that the component force in the inclined surface direction of the weight of the concrete secondary product is not generated. Thereby, it is possible to prevent the concrete secondary product from sliding along the inclined surface, and the concrete secondary product can be laid in a stable state on the inclined surface.

  In addition, by not generating a component force in the direction of the inclined surface of the weight of the concrete secondary product, when multiple concrete secondary products are laid along the inclined surface from the lower side to the upper side, the upper side of the concrete secondary product No longer receives power from As a result, it is possible to prevent a plurality of concrete secondary products laid along the inclined surface from falling down and collapsing from the lower concrete secondary product, and to safely lay the concrete secondary product on the inclined surface. Can do.

  In addition, by adjusting the height of concrete secondary products and / or making fine adjustments in the horizontal direction, multiple secondary concrete products laid along an inclined surface can be accurately aligned without shifting adjacent concrete secondary products. Can be joined. Thereby, a highly accurate thing can be constructed as a structure for a waterway or a road.

  In addition, height adjustment and horizontal fine adjustment of secondary concrete products can be performed by simple work without using special machinery or equipment. It is possible to shorten the construction period and reduce the construction cost in laying work on the inclined surface of the product.

It is a perspective view of the concrete secondary product which applies the laying structure of the concrete secondary product of the present invention. It is principal part sectional drawing of the concrete secondary product which shows the laying structure of the concrete secondary product of this invention. It is sectional drawing which shows a part of bottom plate of a concrete secondary product. It is a side view which shows the supporting member with which the attachment hole of the bottom plate of a concrete secondary product is mounted | worn. It is a side view which shows the base member for laying. It is a disassembled perspective view of the base member for laying. It is a perspective view when laying the concrete secondary product in the construction method of the structure by the concrete secondary product of the present invention. It is explanatory drawing when the some concrete secondary product is put in order and joined in the construction method of the structure by the concrete secondary product of this invention. It is explanatory drawing when filling concrete in the construction method of the structure by the concrete secondary product of this invention is laid. It is explanatory drawing when constructing | assembling the structure in the construction method of the structure by the concrete secondary product of this invention. It is sectional drawing which shows the laying structure of the conventional concrete secondary product.

An embodiment of a concrete secondary product laying structure and a method for constructing a structure using a concrete secondary product of the present invention will be described.
1 is a perspective view of a concrete secondary product 1 to which the concrete secondary product laying structure of the present embodiment is applied, and FIG. 2 is a diagram of the concrete secondary product 1 showing the laying structure of the concrete secondary product of the present embodiment. It is principal part sectional drawing.
As shown in FIG. 1, the concrete secondary product 1 according to the present embodiment is a box culvert that is buried in the ground for use in waterways or roads. The size is, for example, a width of 2 m, a height of 2 m, and a depth of 2 m. Of course, the size is not limited to this. Moreover, the concrete secondary product 1 is not limited to a box culvert. Other types such as a U-shaped culvert, an L-shaped retaining wall block, and an inverted T-shaped retaining wall block may be used. Further, its use is not limited to waterways and roads. Others such as a common groove for storing lifelines such as electricity, telephone, gas, and water and sewerage may be used.

  As shown in FIG. 2, the concrete secondary product laying structure includes a concrete secondary product 1 provided with an inclined mounting hole 11 in the vertical direction on the bottom plate 12 when laid on the inclined surface 40, and A supporting member 2 inserted through the mounting hole 11 of the concrete secondary product 1, and a base member 3 for laying when the lower surface is inclined at an angle corresponding to the inclined surface 40 and the upper surface is a horizontal surface when laid on the inclined surface 40. Have.

FIG. 3 is a cross-sectional view showing a part of the bottom plate 12 of the concrete secondary product.
In the concrete secondary product 1, the oblique mounting holes 11 provided in the bottom plate 12 are perpendicular to the bottom plate 12 by the same angle θ as the gradient of the inclined surface 40 on which the concrete secondary product 1 is laid, as shown in FIG. 3. Tilt from the direction and open. Thereby, when the concrete secondary product 1 is laid in the inclined surface 40, the attachment hole 11 becomes a perpendicular direction. In addition, although the gradient of the inclined surface 40 assumed here is about 3 to 8%, the gradient of the inclined surface 40 is not limited to this. For example, the mounting holes 11 are provided at four locations, which are the four corners of the bottom plate 12 of the concrete secondary product 1. The support member 2 is inserted into each of the four attachment holes 11. In addition, the location which provides the attachment hole 11 is not limited to this. It may be further increased or decreased depending on the size and shape of the concrete secondary product 1.

FIG. 4 is a side view showing the support member 2 mounted in the mounting hole 11 of the bottom plate 12 of the concrete secondary product 1.
As shown in FIG. 4, the support member 2 includes an upper bush 15, a lower bush 16, and a support bolt 17. The upper bush 15 includes a hexagonal nut portion 21, an upper flange portion 22, and an inner screw portion 23 inside thereof, and is attached to the upper side of the mounting hole 11 of the concrete secondary product 1. The flange portion 22 is parallel to the inclined surface 40 when the concrete secondary product 1 is laid on the inclined surface 40. Further, the hexagonal nut portion 21 is inclined with respect to the flange portion 22 by the same angle θ as the gradient of the inclined surface 40, and the inner screw portion 23 provided inside thereof is also inclined. Thereby, when the concrete secondary product 1 is laid on the inclined surface 40, the hexagonal nut portion 21 and the inner screw portion 23 mounted in the mounting hole 11 of the bottom plate 12 of the concrete secondary product 1 are in the vertical direction.

  The lower bush 16 includes a truncated cone part 24, a flange part 25 at the lower part thereof, and an inner screw part 26 inside thereof, and is attached to the lower side of the attachment hole 11 of the concrete secondary product 1. The flange portion 25 is parallel to the inclined surface 40 when the concrete secondary product 1 is laid on the inclined surface 40. Further, the truncated cone portion 24 is inclined with respect to the flange portion 25 by the same angle θ as the gradient of the inclined surface 40, and the inner screw portions 26 provided on the inside thereof are similarly inclined. Thereby, when the concrete secondary product 1 is laid on the inclined surface 40, the truncated cone part 24 and the internal thread part 26 mounted in the mounting hole 11 of the bottom plate 12 of the concrete secondary product 1 are in the vertical direction.

  The support bolt 17 has a shaft portion 27 and a head portion 28 provided with screw grooves over the entire length, and the tip thereof is directed downward to the inner screw portion 23 of the upper bush 15 and the inner screw portion 26 of the lower bush 16. Screw together. Thereby, the support bolt 17 becomes a vertical direction when the concrete secondary product 1 is laid on the inclined surface 40. In addition, the support bolt 17 used here is a hexagon bolt, a hexagon socket head bolt, etc.

FIG. 5 is a side view showing the laying base member 3, and FIG. 6 is an exploded perspective view of the laying base member 3.
5 and 6, when the laying base member 3 is laid on the inclined surface 40, the lower surface is inclined at an angle corresponding to the inclined surface 40 and is parallel to the inclined surface 40, and the upper surface is a horizontal plane. It has a plate 31 with an inclination, a flat plate-like fixed plate 32 arranged on the plate 31 with an inclination, and a plate-like slide plate 33 arranged on the fixed plate. An antifriction material 34 is disposed between them. Thereby, when installing in the inclined surface 40, the upper surface of the slide plate 33 located on the top also becomes a horizontal surface. Note that the laying base member 3 is laid on the inclined surface 40 at a location facing the mounting hole 11 and the support member 2 of the concrete secondary product 1.

  The inclined plate 31 is positioned at the bottom of the laying base member 3 and its lower surface is an inclined surface having the same angle θ as the gradient of the inclined surface 40. Thereby, when it lays in the inclined surface 40, while the lower surface inclines at the angle corresponding to the inclined surface 40, the upper surface turns into a horizontal surface. The inclined plate 31 is a steel product, and has a square shape with a size of about 100 to 200 mm.

  The flat fixed plate 32 is an iron plate and has a square shape with a length of about 100 to 200 mm and a thickness of about 4 to 6 mm.

  The flat slide plate 33 is an iron plate, like the fixed plate 32, and has a square shape of about 100 to 200 mm in length and width and a thickness of about 4 to 10 mm.

  The size and shape of the inclined plate 31, the fixed plate 32, and the slide plate 33 are not limited to those described above. Also, the materials are not limited to steel processed products and iron plates. Other materials such as a stainless steel plate may be used.

  The anti-friction material 34 disposed between the fixed plate 32 and the slide plate 33 is a material that reduces friction between the fixed plate 32 and the slide plate 33, and is in the form of powder, liquid, paste, or the like. It is. Moreover, the thickness shall be about 1-5 mm. Instead of the anti-friction material 34 provided between the fixed plate 32 and the slide plate 33, another material such as an anti-friction sheet or a miniature ball bearing may be used.

  In the concrete secondary product laying structure, when the concrete secondary product 1 is laid on the inclined surface 40, the tip of the support bolt 17 of the support member 2 contacts the upper surface of the slide plate 33 of the laying base member 3. Touch. At this time, the mounting hole 11 of the concrete secondary product 1 and the support bolt 17 of the support member 2 are in the vertical direction. Thereby, the concrete secondary product 1 can be supported in the vertical direction by the support bolts 17 of the support member 2.

  Moreover, the height adjustment at the time of laying of the concrete secondary product 1 can be performed by rotating the support bolt 17 of the support member 2 and changing the downward protrusion amount. That is, the height at the time of laying the concrete secondary product 1 can be adjusted by a simple operation by simply rotating the support bolt 17 of the support member 2 without using a special machine or device. It can be simplified.

  Further, in the laying base member 3, by horizontally moving the slide plate 33 with respect to the fixed plate 32, it is possible to finely adjust the horizontal direction of the concrete secondary product 1 located on the upper part thereof. At this time, the end of the support bolt 17 of the support member 2 bites into the upper surface of the slide plate 33 of the laying base member 3, so that the concrete secondary product 1 also moves horizontally together with the slide plate 33. The fine adjustment in the horizontal direction of the concrete secondary product 1 can be performed with a small force without requiring a large force by the antifriction material 34 provided between the fixed plate 32 and the slide plate 33.

  According to this embodiment, when the concrete secondary product 1 is laid on the inclined surface 40, the support bolts 17 of the support member 2 attached to the attachment holes 11 of the concrete secondary product 1 are in the vertical direction. Therefore, the weight of the concrete secondary product 1 acts in the vertical direction by the support bolts 17 of the support member 2 and is received on the upper surface of the slide plate 33 of the laying base member 3 which is a horizontal plane below the concrete secondary product 1. No component force is generated in the direction of the inclined surface with a weight of 1. This prevents the secondary concrete product from sliding along the inclined surface 40.

  Further, since the component force in the direction of the inclined surface of the weight of the concrete secondary product 1 is not generated, when the plurality of concrete secondary products 1 are laid along the inclined surface 40 from the lower side to the upper side, the concrete secondary product No force is received from the upper side of 1. As a result, it is possible to prevent the plurality of concrete secondary products 1 laid out along the inclined surface 40 from collapsing from the lower concrete secondary product 1 and falling down.

Next, the construction method of the structure by the concrete secondary product using the concrete secondary product laying structure will be described.
Here, a case where a concrete structure for a water channel is constructed by laying a concrete secondary product 1 that is a plurality of box culverts will be described as an example.
FIG. 7 is a perspective view when the concrete secondary product 1 is laid, FIG. 8 is an explanatory diagram when a plurality of concrete secondary products 1 are joined side by side, and FIG. 9 is a diagram when the filled concrete 42 is placed. FIG. 10 is an explanatory diagram when a structure is constructed.

  The method of constructing a structure using a concrete secondary product includes a step of laying a plurality of concrete secondary products 1 along the inclined surface 40 on the inclined surface 40, and a plurality of concrete secondary products 1 laid on the inclined surface 40. Thereafter, the height of the concrete secondary product 1 is adjusted by changing the protruding amount of the support bolt 17 of the support member 2 and / or the slide plate 33 of the laying base member 3 is horizontally moved to level the concrete secondary product 1. By finely adjusting the direction, there is a step of joining adjacent concrete secondary products 1 without deviation.

  Prior to the construction of the structure using the secondary concrete product, first, at the construction site where the structure for the water channel is constructed, excavation is performed so as to incline from the lower side toward the upper side, and the foundation concrete 41 is provided at the excavated place. To cast. At this time, the upper surface of the placed concrete 41 is an inclined surface 40 that is inclined from the lower side toward the upper side. The gradient of the inclined surface 40 is about 3 to 8%.

  After the placement, as shown in FIG. 7, a plurality of concrete secondary products 1 are arranged along the inclined surface 40 by using the concrete secondary product laying structure on the basic concrete 41 that becomes the inclined surface 40. Lay it in a straight line.

  After laying a plurality of concrete secondary products 1 on the inclined surface 40, the height of the concrete secondary product 1 is adjusted by changing the amount of downward protrusion of the support bolt 17 of the support member 2. At the same time, the horizontal movement of the slide plate 33 of the laying base member 3 is performed to finely adjust the concrete secondary product 1 positioned above the slide plate 33 in the horizontal direction. Thereby, by performing the height adjustment at the time of laying the concrete secondary product 1 and the fine adjustment in the horizontal direction, as shown in FIG. 8, the adjacent concrete secondary product 1 can be accurately joined without being displaced. it can. This is performed in all the concrete secondary products 1 laid along the inclined surface 40.

  In this way, a plurality of concrete secondary products 1 are laid in a straight line along the inclined surface 40, and after these are accurately joined without shifting, the foundation concrete 41 that becomes the inclined surface 40 is obtained as shown in FIG. And filling concrete 42 between the bottom plate 12 of the concrete secondary product 1.

  After that, a plurality of secondary concrete products 1 laid along the inclined surface 40 are covered with earth and sand and backfilled to complete a series of construction work. Thereby, as shown in FIG. 10, a plurality of concrete secondary products 1 can be laid along the inclined surface 40 to construct a structure for a water channel.

  In the constructed structure for a water channel, resistance along the flow acts on the concrete secondary product 1 due to the water flowing in the structure, but the weight of the water itself is vertical to the concrete secondary product 1 by the support member 2. Since it supports in a direction, it can prevent that the some concrete secondary product 1 laid along the inclined surface 40 collapses.

  DESCRIPTION OF SYMBOLS 1 ... Concrete secondary product, 2 ... Support member, 3 ... Base member for installation, 11 ... Mounting hole, 12 ... Bottom plate, 15 ... Upper bush, 16 ... Lower bush, 17 ... Support bolt, 21 ... Hex nut part, 22 ... Flange part, 23 ... Inner thread part, 24 ... Frustum part, 25 ... Flange part, 26 ... Inner thread part, 27 ... Shaft part, 28 ... Head, 31 ... Inclined plate, 32 ... Fixed plate, 33 ... Slide plate, 34 ... Antifriction material, 40 ... Inclined surface, 41 ... Foundation concrete, 42 ... Filled concrete, 51 ... Concrete secondary product, 52 ... Bottom plate, 53 ... Mounting hole, 54 ... Support member, 55 ... Support bolt, 56 ... foundation concrete, 57 ... base member for laying.

Claims (5)

A concrete secondary product laying structure for laying a concrete secondary product on an inclined surface,
When laid on the inclined surface, the concrete secondary product provided with a mounting plate in the bottom plate in the vertical direction,
When inserted into the mounting hole of the concrete secondary product and laid on the inclined surface, a support member that supports the concrete secondary product in the vertical direction;
When laying on the inclined surface, the lower surface is inclined at an angle corresponding to the inclined surface, and the laying base member is a horizontal surface that supports the support member;
A concrete secondary product laying structure. In the laying structure of the concrete secondary product according to claim 1,
The support member is mounted on the upper side of the mounting hole of the concrete secondary product, and when laid on the inclined surface, an upper bush provided with an internal thread portion that is vertical and a flange portion that is parallel to the inclined surface And a lower bush provided with an inner screw portion that is vertical and a flange portion that is parallel to the inclined surface when installed on the lower side of the mounting hole of the concrete secondary product and laid on the inclined surface, A support bolt that is threadedly engaged with an inner thread portion of the upper bush and an inner thread portion of the lower bush;
A concrete secondary product laying structure in which the height of the concrete secondary product can be adjusted by rotating the support bolt to change the downward protrusion amount. In the laying structure of the concrete secondary product according to claim 1 or 2,
When the laying base member is laid on the inclined surface, the lower surface is inclined at an angle corresponding to the inclined surface, and the upper surface is a horizontal plane, and the flat fixed plate disposed on the inclined plate And a flat slide plate disposed on the fixed plate,
A concrete secondary product laying structure in which the slide plate is horizontally moved with respect to the fixed plate so that the horizontal direction of the concrete secondary product located on the slide plate can be finely adjusted. In the laying structure of the concrete secondary product according to claim 3,
A concrete secondary product laying structure in which an antifriction material is disposed between a fixed plate and a slide plate of the laying base member. A method for constructing a structure using a concrete secondary product laid using the concrete secondary product laying structure according to any one of claims 1 to 4,
Laying a plurality of concrete secondary products along the inclined surface on the inclined surface;
After laying a plurality of concrete secondary products on an inclined surface, the height of the concrete secondary product is adjusted by changing the protruding amount of the support bolt of the support member, and / or the slide plate of the laying base member is moved horizontally. And performing a horizontal adjustment of the concrete secondary product to join adjacent concrete secondary products without shifting,
A method for constructing a structure using a secondary concrete product for constructing a structure for a waterway or a road.

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