JP2003003495A - Spacer for back-filling concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer for back-filling concrete for use in mortar block piling work in civil engineering works or the like, which eliminates an accident of slipout or toppling thereof at the time of placing back-filling concrete, and simplifies and ensures placement of the back-filling concrete. SOLUTION: When the back-filling concrete is placed, a member (7) serving as a sheath of the back-filling concrete spacer is embedded in a concrete block (1) beforehand when it is manufactured, and at the time of placement in the construction field, the back-filling concrete spacer (6) is inserted into the sheath (7), to thereby secure a dimension of the back-filling concrete, conforming to specifications. In this manner, the concrete block bears and stabilizes back-filled ballast (4) and a loose form (5). Further, by virtue of the spacer, labor saving is achieved.

Description

Detailed Description of the Invention

[0001] The present invention is a member for ensuring the width for placing backfilled concrete, and for surely and easily performing the work of backfilled crushed stone, barrel concrete, and backfilled concrete. Is an invention relating to

[0002]

2. Description of the Related Art A conventional technique is shown in FIG. If there is concrete block product and there is backfilled concrete, build a plate with the same width as the backfilled concrete to secure the width of the backfilled concrete on the back of the concrete block of 35 cm, and then back it. Build a punching mold to stop the crushed stone, and put the crushed stone in the back to pour the concrete and the back-filled concrete at the same time.
After placing concrete, the plate for stopping the width and the punching frame are pulled out and cleaned, and one cycle is completed. In addition, there is a technology that uses reinforcing bars for the width stop material.

[0003]

According to the prior art,
Prior to the introduction of crushed gravel stones, put a plate of width-stopping material on the back of the concrete block so that it is sandwiched by a punching form, and the crushed stones of back-filled material should be thrown in so that the width-stop plate does not fall over. I have to. For that purpose, at least two people support the width stop material and the punching formwork, and there is no choice but to put them in with a backhoe or human power so that they do not fall. After this work is completed, it is finally time to place the concrete and backfill concrete at the same time.The concrete is usually placed using a hopper or the like, but when the ready-mixed concrete is put in, the width stop plate is pushed down by the ready-mixed concrete. Will end up.
Then, the pressure of the back-filled crushed stone pushes the punching mold toward the back-filled concrete side, and the back-filled concrete cannot obtain the size according to the standard. When the concrete placing work is completed, the width stop material and the punching frame are pulled out and washed with water, but there is concern about the watertightness of the concrete after the width stop material is pulled out. As described above, a great deal of labor is required, and it is not certain that dimensions according to the standard have been obtained, the problem of watertightness, etc. In addition, the technology of using rebar as a width stop material is expensive and is not used often. So this invention
It is an object of the present invention to provide a reliable and low-cost width stop material that can obtain the dimensions of the back-filled concrete according to the standard value, and reduce labor.

[0004]

In order to solve the above-mentioned problems, the invention of claim 1 relates to a member for securing a width for placing concrete in backfill and for supporting a punching form. In addition, the invention of claim 2 installs a punching formwork for holding the width of the backfilled concrete during the backfilled crushed stone loading work, and the loading work of the barrel concrete, the backfilled concrete, and the backfilled crushed stone. It is a member for sure and easy.

[0005]

DETAILED DESCRIPTION OF THE INVENTION One embodiment of the present invention is shown in FIG.
As shown in FIG. The material of the back spacer and the sheath is plastic. The back con spacer is a width stop material that maintains the dimensions of the back embedding fillet according to the standard values and supports the back embedding crushed stone and the punching mold. The sheath is a sheath for embedding in the concrete in advance at the time of manufacturing the concrete block and inserting the back spacer. The back con spacer will be installed on site after the concrete block is completely installed. In the structure, the column and the supporting portion in contact with the punching frame intersect at right angles, the cross section of the column portion is cylindrical, and the portion supporting the punching frame is a square pole. This is because by intersecting at right angles, in the case of backfilled concrete of equal thickness, the front slope of the block product and backfilled concrete are made parallel. Also, by making the columns cylindrical,
The back spacer can be freely rotated in any direction for fine adjustment. Considering the length of the insertion part to the sheath, the length of the pillar of the back con spacer is the standard size of the back-filled concrete (mainly 10 cm, 15 cm, 20
cm) according to the length. The tip of the strut is wedge-shaped, and the end of the portion where the strut of the sheath is also inserted is wedge-shaped, so that it is pushed firmly and finally, it will rotate or come off unnecessarily. Prevent things.

[0006]

[Effects of the Embodiment] According to this embodiment, when the back-con spacer is inserted and set in the sheath of the concrete block which is embedded in the manufacturing stage in advance, the punching form is built and the back-crushed crushed stone is put in. In the past,
People used to support the punching form and the width stop material, but only the pulling form should be supported. In addition, the width-stopping material often fell down when throwing concrete in the back, concrete in the back, and crushed stone in the back, and the concrete blocks piled up at that time also moved and there was a lot of rework work. Once the back con spacer is set, it will not come off, and the back con spacer is a burying member, so you can save the work of removing concrete and washing with water after the concrete is placed. Above all, during construction according to the standard value and when pulling out the width stop material as in the past,
There is no concern about voids in the concrete, and high-quality water-tight concrete can be obtained. Also, in terms of cost, it is considered that there will be no impact when considering the extra effort and labor costs related to reworking up to now.

[0007]

[Other Embodiments] By embedding the embedding position of the sheath shown in FIG. 1 in the center of the back surface at the stage of manufacturing a concrete block, not only the volume but also the direction of the block and the block in the case of the valley construction It can also handle changes in the front slope.

[0008]

As described above, according to the present invention, reduction of extra labor, reliable construction, and smooth flow of the construction process can be expected.

[0009]

BACKGROUND OF THE INVENTION The present invention is used for kneading block laying work, which is mainly associated with civil engineering works, so that higher quality can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a width stop spacer showing an embodiment of the present invention.

FIG. 4 is a front view of a width stop spacer showing an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a conventional technique.

[Explanation of symbols]   Concrete block (Machi block)   Body concrete   Lining concrete   Urakami crushed stone   Punching formwork   Back-filling concrete width stopper (back con spacer)   Back-filling concrete width stopper (back spacer spacer)   Conventional width stop material

Claims (2)

[Claims] 1. A width stop member for the purpose of holding the casting width of back-filled concrete and supporting the punching form. 2. A backing crushed stone, which is provided with a punching formwork for holding the width of the back-filled concrete when the back-filled crushed stone is put in.
A member that ensures reliable and easy loading of body-filled concrete and back-filled concrete.