JPH0571159A - Concrete block installing method - Google Patents

Abstract

PURPOSE:To dispense with the manual operation of putting rollers from the rear to the front of a center plate in the progress direction and leaving a constant space between the rollers to prevent loads applied to the rollers from large fluctuation by facilitating the shift of a block body with a roller device to ensure the safety of operations and circulating a plurality of the rollers around the center plate. CONSTITUTION:A roller device 21 having a plurality of rollable rollers 26 interconnected by an endless chain 25 on the front and rear edges and the upper and lower surfaces of a center plate 24 having the front and rear edges formed arcuately is used, and a block body 1 is provided on both sides of an installing surface 11 with a guide groove 16 having the bottom surface of steel material 17 and the roller device 21 disposed therein. The block body 1 is placed on the roller device 21 to be shifted to a predetermined position along the guide groove 16. After the block body 1 is jacked up and the roller device 21 is removed, the block body 1 is installed on the installing surface 11 and the succeeding block body 1 is sequentially connected to the preceeding block body 1.

Description

Detailed Description of the Invention

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a concrete block such as a box culvert for forming an underdrain, a common ditch, an underground passage or the like.

[0003]

2. Description of the Related Art Conventionally, a method of continuously installing a plurality of preformed concrete culvert bodies has been used for the construction of underdrain, common ditch, underpass, and the like.

In this method, generally, the culvert body is directly installed at a predetermined position by an on-vehicle crane or the like.
If there is no space to move the crane truck on site due to various conditions such as traffic conditions and surrounding terrain, lower the culvert body at a position where the crane truck can move, and move this culvert body on the installation surface. Then, it is installed at a predetermined position, and a retracting method is employed in which a later culvert body is sequentially connected to a first culvert body.

By the way, in this retracting method, conventionally, a steel material having an L-shaped cross section is installed on both sides of the installation surface of the culvert body, the culvert body is placed on this steel material, and the culvert body is mounted on this steel material. Although it was slid and moved to a predetermined position, if the weight of the culvert body is long or the movement distance is long, it is difficult to move the culvert body and it is difficult to secure work safety.

[0006]

As described above, when the concrete block body such as the box culvert is constructed, it is not easy to move the block body by the conventional retracting method.

The present invention has been made in view of the above points, and an object thereof is to facilitate movement of a block body.

[Configuration of Invention]

[0009]

SUMMARY OF THE INVENTION The present invention is a method of installing a concrete block in which a plurality of preformed concrete block bodies 1, 1a, 1b are continuously installed. Using the roller device 21 in which a plurality of rollers 26 connected by an endless chain 25 are rotatably arranged on the front and rear edges and the upper and lower surfaces of the formed center plate 24, the installation surface 11 of the block bodies 1, 1a, 1b is installed. A guide groove 16 having at least a bottom surface made of steel 17 is provided on both sides, and the guide groove 16 on both sides is formed.
The roller device 21 is arranged on the bottom surface of the block body 1, and the block bodies 1, 1a, 1b are placed on the roller device 21, and the block bodies 1, 1
Move a and 1b along the guide groove 16 via the roller device 21,
After jacking up the block bodies 1, 1a, 1b that have moved to predetermined positions and removing the roller device 21 from the lower part thereof, the block bodies 1, 1a, 1b are installed on the installation surface 11, and the starting block body is sequentially started. 1, 1a and 1b are connected to the later block bodies 1, 1a and 1b.

[0010]

In the concrete block installation method of the present invention, when the block bodies 1, 1a, 1b are moved, the block body 1,
A plurality of rollers 26 of the roller device 21 supporting 1a and 1b roll between the center plate 24 of the roller device 21 and the steel material 17, and circulate around the center plate 24 by the chain 25.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete block installation method of the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a culvert body as a block body, and each culvert body 1 is embedded in concrete with necessary metal fittings such as reinforcing bars and anchor bolts not shown, and the like in a formwork. As shown in FIG. 3, it is formed in advance and is formed in a hollow box-like shape having a square cross-section with front and rear end faces formed of a bottom plate 2, a pair of left and right wall plates 3 and a top plate 4.

As shown in FIG. 2, each of the culvert bodies 1 has a convex portion 7 formed around the opening on the front end surface thereof, and a concave portion 8 formed around the opening portion on the rear end surface thereof. By fitting the convex portion 7 and the concave portion 8 with each other, they can be connected to each other in the front-rear direction and can be continuously installed. There is enough room to adjust the position.

As the culvert body 1, the bottom board 2, the left and right wall boards 3 and the top board 4 are integrally formed in a square cross-section from the beginning, and a horizontal dividing surface P in the middle of the wall board 3 is formed. In some cases, the culvert bodies 1a and 1b as the upper and lower block bodies, which are divided into two parts by the upper and lower parts and are separately molded, are later combined and integrated.

Reference numeral 11 denotes an installation surface on which the culvert body 1 is continuously installed. The installation surface 11 is cured by placing a basic concrete 13 on a slag stone foundation 12 having a predetermined thickness of slag stones. It is formed by

By installing a pair of steel materials 15 each having an L-shaped cross section through reinforcing rebars 14 (shown in FIG. 1) on both left and right sides of the installation surface 11 when the foundation concrete 13 is poured, Guide grooves 16 are formed, steel plates 17 as steel materials are installed at the bottoms of the left and right guide grooves 16, and welded to a steel material 15 having an L-shaped cross section.

Further, support frames 18 and 19 (shown in FIG. 4) made of steel are installed on both front and rear ends of the installation surface 11.

Reference numeral 21 denotes a roller device such as a chill tank (registered trademark). As shown in FIG. 5, the roller device 21 has a pair of left and right side plates 23 fixed in parallel to the lower portion of a top plate 22. A center plate 24 having front and rear edges formed in an arc shape is horizontally fixed between a pair of side plates 23, and is axially connected to the front and rear edges and upper and lower surfaces of the center plate 24 by a pair of left and right endless chains 25. Multiple rollers
26 is arranged so that it can roll.

Two roller devices 21 are arranged on each of the steel plates 17 forming the bottom surfaces of the left and right guide grooves 16, and a pair of front and rear roller devices 21 arranged in each guide groove 16 are shown in FIG. A horizontal steel plate 32 for the bottom surface of the culvert body 1 is fixed to the outer side portion of the top plate 22 of each roller device 21 with a connecting plate 31, and a tip end portion of the horizontal steel plate 32 for the outer side surface of the culvert body 1. The vertical steel plate 33 is fixed.

When the roller device 21 moves on the steel plate 17 on the bottom surface of the guide groove 16, a plurality of rollers 26 roll between the center plate 24 and the steel plate 17 and the chain.
Since it circulates around the center plate 24 by 25, it is not necessary to manually replace the roller 26 from the rear side to the front side in the traveling direction like a normal independent roller.
Since the intervals of 26 are constant, the load on the rollers 26 does not fluctuate significantly.

Reference numeral 36 is a support for preventing falls, and this support 36 is a horizontal steel material 37 fixed horizontally on the bottom plate 2 of the culvert body 1 with vertical steel materials 38 attached to the lower portions of the front and rear ends, respectively. The lower end of the vertical steel 38 of
11 are opposed to each other at a predetermined interval, and one culvert body 1 is provided on each side.

In order to secure the adhesion when the culvert body 1 is installed on the foundation concrete 13 on the installation surface 11 immediately before the installation of the culvert body 1 as shown in FIG. Lay thinly the mortar 41 of.

In this state, as shown in FIG. 4, the culvert body 1 is lowered to the rear end portion of the installation surface 11 by the wire 42 of the vehicle-mounted crane or the like, and the four roller devices 21 arranged in advance are set.
It is placed on the top plate 22 in a state of being aligned by the two right and left vertical steel plates 33 connected to the top plate 22.

Next, a pair of left and right supports 36 are fixed to the bottom plate 2 of the culvert body 1.

After that, a pair of left and right wires 43 to be wound up by, for example, a winch are provided on the support frame 18 at the front end of the installation surface 11 from the pair of left and right pulleys 44 provided on the support frame 19 at the rear end of the installation surface 11. After being hung around a pair of left and right pulleys 45, it is connected to the bottom plate 2 of the culvert body 1 on the roller device 21, and a pair of left and right wires 43
Wind up evenly and slowly.

Then, the culvert body 1 on the roller device 21.
Is drawn toward the support frame 18 at the front end of the installation surface 11 and moves along the pair of left and right guide grooves 16 via the roller device 21. Further, it can be moved along the pair of left and right guide grooves 16 by pushing without using a winch or the like.

Then, the support 36 is removed with the culvert body 1 moved to a predetermined position.

After that, a pair of front and rear jacks are engaged with the left and right outer side surfaces of the culvert body 1 one by one.
The culvert body 1 is jacked up by uniformly acting the base jacks, and the roller device 21 is pulled out from under the culvert body 1.

Then, when the installation of the culvert body 1 is completed, the next culvert body 1 is lowered to the rear end portion of the installation surface 11 by the wire 42 of the vehicle-mounted crane or the like, as described above, and the roller device 21 is installed. The support 36 is fixed to the culvert body 1, and the culvert body 1 is pulled toward the culvert body 1 previously installed with a winch or the like.

And, the support 36 of this culvert body 1
Is about to hit the culvert body 1 installed earlier,
The vertical steel material 38 on the front side of the support 36 is removed from the horizontal steel material 37, and thereafter, in the same manner as above, the culvert body 1 is moved to a predetermined position and connected to the culvert body 1 previously installed to completely support the support 36. Then, the culvert body 1 is jacked up, the roller device 21 is pulled out, the installation position is finely adjusted, and the culvert body 1 is installed.

In this way, the subsequent culvert body 1 is successively connected to the starting culvert body 1.

As described above, the culvert body 1 is lowered at a position where the mobile crane can move.
Is installed on the installation surface 11 at a position where a crane car cannot move, and the roller device 21 is installed in the retracting method of constructing a box culvert by sequentially connecting the first culvert body 1 to the later culvert body 1. By using the culvert body 1, the movement of the culvert body 1 can be facilitated, and the work safety can be easily ensured.

In the above-mentioned embodiment, the culvert body 1 having the bottom plate 2, the left and right wall plates 3 and the top plate 4 has a square cross section.
However, in the field where the integral culvert body cannot be installed, the culvert body 1 having a square cross section is divided into two parts at the middle horizontal dividing plane P of the wall board 3 and is separately molded. The culvert bodies 1a and 1b are separately installed.

In this case, the construction of the lower culvert body 1b is exactly the same as in the above-mentioned embodiment.

When constructing the upper culvert body 1a, a guide groove is formed in advance on the upper end surface of the wall board 3 of the lower culvert body 1b, that is, the horizontal dividing surface P, and the construction is completed and connected. When the above steel plate 17 is installed in the guide groove of the dividing surface P on the wall board 3 of the lower culvert body 1b, the roller device 21 can be used here, so that the upper culvert body 1a of the upper culvert body 1a can be used. Construction can be performed.

In the above-mentioned embodiment, the guide groove 16 is formed by
Although a pair of steel material 15 having an L-shaped cross section and steel plate 17 are used, a steel material having a U-shaped cross section may be used from the beginning.

[0037]

As described above, according to the present invention, since the block device is used to move the block body when a plurality of preformed concrete block bodies are continuously installed, the block body is moved. It is easy to secure work safety. The roller device has multiple rollers circulating around the center plate.
It is not necessary to manually switch the rollers from the rear to the front in the traveling direction, and since the distance between the rollers is constant, the load on the rollers does not fluctuate significantly.

[Brief description of drawings]

FIG. 1 is a front view enlarged cross-sectional view of a working state of an embodiment of a concrete block installing method of the present invention.

FIG. 2 is a side view enlarged cross-sectional view of a construction state of the above embodiment.

FIG. 3 is a front view cross-sectional view of a construction state of the above embodiment.

FIG. 4 is a side view cross-sectional view of the working example of the above embodiment.

FIG. 5 is a perspective view of a roller device used in the construction of the above embodiment.

[Explanation of symbols]

 1, 1a, 1b Culvert body as block body 11 Installation surface 16 Guide groove 17 Steel plate as steel material 21 Roller device 24 Center plate 25 Chain 26 Roller

Claims (1)

[Claims] 1. A method of installing a concrete block in which a plurality of preformed concrete block bodies are continuously installed, wherein the front and rear edges of a center plate having arcuate front and rear edges are endless at the front and rear edges and upper and lower surfaces. Using a roller device in which a plurality of rollers connected by a chain are rotatably arranged, guide grooves with steel at least the bottom surface are provided on both sides of the installation surface of the block body, and the guide grooves on both sides of the guide groove are Place the roller device, place the block body on this roller device,
This block body is moved along the guide groove through the roller device, the block body that has been moved to a predetermined position is jacked up and the roller device is removed from the lower part thereof, and then the block body is installed on the installation surface, A method of installing a concrete block, characterized in that the first block is connected to the second block.