JP2912911B1 - Perforation method of concrete slab - Google Patents

Abstract

[PROBLEMS] When a large number of bolt insertion holes are drilled over a wide range of a concrete slab using a diamond core drill, the misalignment of the diamond core drill is caused by, for example, pavement ring excavation or inclination of a road surface. Because
Drilling with high precision by unifying the angle is almost impossible. SOLUTION: A plurality of diamond core drills are mounted on a mount provided with a gantry height adjusting device so as to enable drilling of a concrete floor slab by a drill blade, and the diamond core drill mount is mounted on the concrete slab. Place and measure the slope of the lower surface of the floor slab, adjust the slope of the diamond core drill mounting table by operating the gantry height adjustment device so as to be parallel to the slope of the lower surface, and then mount the diamond core drill mounting table. A plurality of diamond core drill bits are fixed on a concrete floor slab and drilled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drilling a concrete slab of a bridge.

[0002]

2. Description of the Related Art A rock drill or a diamond core drill is known as a device used for drilling a concrete floor slab of a bridge. However, when a reinforcing bar or the like is disposed on the upper and lower surfaces of the concrete floor slab, However, a diamond core drill is usually used because this may hinder drilling with a rock drill.

[0003] In a diamond core drill 1, for example, as shown in Figs. 14 and 15, a core drill body 1b having a drill blade 1a is provided with a concrete anchor 1c for fixing a support and a height adjusting bolt 1d for the support. It is attached to a core drill support column 1e that is upright on a core drill support base 1f. In use, the height of the core drill support 1f is adjusted on a concrete floor slab or the like using the support height adjustment bolt 1d, and the core drill support 1f is attached and fixed using the support anchor 1c. Drilling is performed by rotating the drill blade by operation of a built-in motor and by propelling the motor by operation or manually.

[0004]

Drilling using such a diamond core drill is common and widely used. However, since the conditions of the concrete slab on the side to be drilled are different, the following methods are required. There is such a problem.

[0005] As shown in FIG.
The pavement b on the upper side may be dug up due to the load of the passing vehicle, and lacks flatness, and the perforated position (right angle position of the concrete floor slab) defined on the lower surface of the concrete slab a is accurately determined. It is almost impossible to aim high. That is, the core of the diamond core drill c is misaligned by the asphalt pavement wheel excavation.

[0006] As shown in Fig. 17, the pavement b on the concrete slab a is provided with a slope for drainage. Aiming at position) is also nearly impossible. That is, the core of the diamond core drill c is misaligned due to the asphalt pavement drainage gradient.

Further, as shown in FIG.
In the linear curve section, there is a change in cross slope due to different drilling locations, and it is difficult to adjust the core drill support to the slope of the floor slab each time. 19A is a sectional view taken along the line AA in FIG. 18, and FIG.
B section, (c) shows the CC section, and (d) shows the DD section.

For this reason, in a reinforcing method in which a steel plate is joined to the upper and lower surfaces of a concrete floor slab, for example, a plurality of bolt insertion holes penetrating the upper and lower surfaces of the concrete floor slab are formed in order to bolt both steel plates. In such a case, the angle of the bolt insertion hole with respect to the concrete floor slab needs to be aligned at right angles, but it is almost impossible to unify the angle with each hole.

[0009]

According to the present invention, a number of holes can be formed in a concrete floor slab with a uniform angle by making the constituent elements as follows.

That is, in the present invention, the constituent requirements are as follows:
A diamond core drill is mounted on a mounting base equipped with a gantry height adjustment device and fixed on a concrete slab. At the same time, measure the slope of the lower surface of the floor slab and operate the gantry height adjustment device to adjust the slope of the diamond core drill mount so that it is parallel to the lower surface slope. A method for drilling a concrete floor slab, wherein the drilling is performed by operating a plurality of diamond core drills with a drill fixed on a slab.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings.

First, a diamond core drill mount used in the present invention will be described with reference to FIGS. 1, 2 and 3.

As the diamond core drill 1, a known drill can be used. In this example, a drill body 1b having a drill blade 1a is mounted on a core drill support column 1e which is erected on a support 1f for mounting a gantry. . The rotation of the drill blade 1a is performed by the operation of a built-in motor, and the propulsion of the drill blade is performed by manually rotating the handle 1h.

The mounting base 2 is sized so that a plurality of diamond core drills 1 can be installed thereon. In this example, ten diamond core drills 1 are provided.
The drill blade insertion hole 2a through which the drill blade 1a is inserted is formed in a size that can be installed. If necessary, a bolt insertion hole 2b for fixing the gantry on a concrete floor slab with an anchor bolt is formed.

In this example, the gantry height adjusting device 3 is attached to both ends of both gantry support girders 7 attached to both longitudinal ends of the mounting gantry 2 by connecting tools 7a via connecting tools 3c. A specific example of the gantry height adjusting device 3 is shown in FIGS. 4 and 5.

FIG. 4 shows an example of a gantry height adjusting device 3 using a jack system. The hydraulic jack 3a is included in the cylindrical portion of the connecting tool 3c, is connected to the upper part of the shaft 3e provided with the casters 3d at the lower end, and is attached to the gantry support beam 7 by the connecting tool 3c.

FIG. 5 shows a gantry height adjusting device 3 using a screw system.
This is an example. Casters 3d at lower end, handle 3 at upper end
An externally threaded shaft 3e provided with f is screwed into a cylindrical portion having an internal thread (not shown) of the connection tool 3c on the inner surface, and is integrally attached to the gantry support beam 7 by the connection tool 3c. .

[0018] The diamond core drill 1 and the mounting gantry 2 as described above are attached to the gantry mounting support 1.
f is fixed to the mounting base 2 with bolts 1g to be integrated, and the diamond core drill mounting base 10 is formed as a whole. In this example, the positions of the drill blades 1a of the plurality of diamond core drills 1
Are located on a straight line across the center.

FIG. 6 shows another example of the diamond core drill mounting table 10 in which the method of mounting the diamond core drill 1 to the mounting base 2 is changed.

The point that the diamond core drill 1 is fixed to the mounting base 2 provided with the gantry height adjusting device 3 is the same as the above-mentioned example, but a plurality of diamond core drills 1 are fixed.
Are different from each other in that the positions of the drill blades 1a are located on respective straight lines in the transverse directions on both outer sides of the mounting base 2. In this case, since the drill blade 1a of the diamond core drill 1 is located outside the mounting base 2,
There is no need to provide a drill blade insertion hole in the mounting base 2 as in the previous example. Reference numeral 2b denotes a bolt insertion hole provided as necessary similarly to the above-described example.

Next, a method of drilling a concrete floor slab a using the above-described diamond core drill mounting base 10 will be described with reference to FIGS.

As shown in FIG. 7, the slope rule 4 is applied to the lower surface of the concrete slab a in advance to measure the slope of the concrete slab a.

Next, as shown in FIG. 8, the diamond core drill mount 10 is placed on the concrete slab a. At this time, due to the unevenness of the pavement b on the concrete floor slab a, the diamond core drill mount 10
Is not necessarily parallel to the concrete floor slab a.

Therefore, the adjusting knob 3 of the gantry height adjusting device 3 is set so that the diamond core drill mounting base 10 is parallel to the gradient of the lower surface of the concrete slab a measured earlier.
Operate e to adjust the height. When they are parallel to each other, the diamond core drill mount 10 is fixed to the concrete floor slab a. 10 and 1 through an anchor bolt insertion hole 2b drilled in the mounting base 2.
Fix as in 1.

After fixing the diamond core drill mounting base 10 on the concrete floor slab a, the drill blade 1a is operated as shown in FIG. 9 to drill the concrete floor slab a.

FIG. 10 shows a state in which the mounting base 2 is fixed by inserting an anchor bolt 5 into the bolt insertion hole 2b, and FIG.

Mount 1 for mounting a diamond core drill
As another method of fixing 0 to the concrete slab a, as shown in FIG. 12, a mounting base 2 is formed like a pallet for a forklift, and a fork of a forklift e is inserted into a fork insertion opening and fixed. , FIG.
Attachment g of power shovel f as shown in 3
The method of holding down the mounting stand 2 by replacing the

[0028]

Since the present invention has been made as described above,
It has the following effects.

The diamond core drill mounting base, in which a plurality of diamond core drills are mounted on a mounting base provided with a gantry height adjusting device, is set so as to be parallel to the gradient of the concrete slab measured by operating the gantry height adjusting device. Since the concrete floor slab is fixedly installed, the same slab can be drilled at the same angle over a wide range of the same slope without causing misalignment.

[Brief description of the drawings]

FIG. 1 is a plan view of a diamond core drill mounting base.

FIG. 2 is a front view of a diamond core drill mounting base.

FIG. 3 is a side view of a diamond core drill mounting base.

FIG. 4 is a detailed view of a gantry height adjusting device.

FIG. 5 is a detailed view showing another example of the gantry height adjusting device.

FIG. 6 is a plan view showing another embodiment of the diamond core drill mount.

FIG. 7 is an explanatory diagram for measuring a gradient from a lower surface of a concrete floor slab using a gradient ruler.

FIG. 8 is a front view showing a state where a diamond core drill mounting base is placed on a concrete slab.

FIG. 9 is a front view showing a state where the diamond core drill is operated in FIG. 5;

FIG. 10 is an explanatory view for fixing a diamond core drill mounting base on a concrete slab using anchor bolts.

FIG. 11 is an explanatory view of fixing a diamond core drill mounting base on a concrete slab using a concrete anchor.

FIG. 12 is an explanatory view of fixing a diamond core drill mounting base on a concrete slab using a forklift.

FIG. 13 is an explanatory view of fixing a diamond core drill mounting base on a concrete slab using a power shovel.

FIG. 14 is a front view of a conventional diamond core drill.

FIG. 15 is a side view of a conventional diamond core drill.

FIG. 16 is an explanatory view showing a state of misalignment in drilling using a conventional diamond core drill.

FIG. 17 is an explanatory view showing a state of misalignment in drilling using a conventional diamond core drill.

FIG. 18 is an explanatory diagram of a curved section of a road.

19A is a sectional view taken along line AA of FIG. 15, and FIG.
-B sectional view, (c) is a CC sectional view, and (d) is a DD sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Diamond core drill 1a Drill blade 1b Drill body 1c Concrete anchor for fixing a support stand 1d Height adjustment bolt for a support stand 1e Core drill support support 1f Support for mounting a gantry 1g Bolt 2 Mounting gantry 2a Drill blade insertion hole 2b Bolt insertion hole 3 gantry Height adjustment device 3a Hydraulic jack 3b Handle 3c Connecting device 3d Caster 3e Shaft 4 Incline ruler 5 Anchor bolt 6 Concrete anchor 7 Mounting support girder 7a Connecting device 10 Diamond core drill mounting base

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E01D 19/12 E01D 21/00

Claims (1)

(57) [Claims] 1. A diamond core drill mounting table, wherein a plurality of diamond core drills are mounted on a mounting base provided with a mounting height adjusting device and fixed to a concrete floor so that drilling of a concrete floor slab is enabled by a drill blade. After placing on the plate, measuring the slope of the lower surface of the floor slab, operating the gantry height adjustment device to adjust the slope of the diamond core drill mounting base so as to be parallel to the slope of the lower surface, and then setting the diamond core drill A method for drilling a concrete floor slab, wherein the mounting base is fixed on a concrete floor slab, and a plurality of diamond core drills are operated to drill.