JPS6039805B2 - Chipping method for concrete walls - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is a concrete wall surface for the purpose of chipping the slope or vertical surface of an old dam when elevating and integrating a new dam onto the wall surface of an old dam such as a concrete dam. Regarding the chipping method.

As for the tools for chipping concrete walls, a) a method of folding by hand using a pick and a chipper, b) a method of scraping with the rotating force of a cutter using a planetary cutter and a sander, c) a method of cutting concrete using the rotational force of the cutter There are methods such as using a scaler and a bisyan bit to chip with the impact force of the bit, but from the viewpoint of safety and functionality, method a allows deep chipping by digging up the concrete, and prevents weathering of the concrete. It is good to be able to reliably treat the surface mortar and create an appropriately uneven surface, but on the other hand, the uneven surface has very acute angles and is not smooth.

Therefore, in order to smooth out this uneven surface, it is troublesome to process it by hand after chipping, and chipping deeper than necessary loosens the aggregate in the concrete, as shown in Figure 1. , Cracks can form in concrete with uneven surfaces. In addition, since pick and chipper tools are used by pressing strongly with the hand, the vibrations of the picks and chips are directly transmitted to the hands, which poses a problem of industrial accidents.Continuous operation is not possible due to vibration injury prevention regulations. Method b generates a considerable amount of dust when cutting, so continuous manual work cannot be done due to dust hazard prevention regulations. In addition, although method c cannot be used more deeply than method a, it can reliably treat weathered parts of concrete walls, and the chipping surface is uneven, so it does not need to be used unnecessarily. There is no risk of damaging the surface. In addition, method c uses the weight of the tool to impact, so there is less vibration and dust.However, the chipping process using method c above has good work efficiency on flat surfaces, but it becomes extremely difficult to perform chipping on slopes or vertical surface joints. In areas with large areas, the tools are heavy and the work must be done manually, so mechanical work is being considered.

However, in mechanical work, the chipping tool is attached to a backhoe, etc., and there is a lot of miscellaneous transportation such as moving the machine with a jib crane every day. Obstacles appeared on the ground, making it impossible to carry out simple work, and the costs associated with mechanical work were high, and there were safety issues when work was duplicated with other work in the same location. . Therefore, we decided to use a light pick 30 (Fig. 3), which is made of steel 3'1 and has a bit 32 attached to it, which is light and can be struck many times.
However, the welded part of the bit 32 may crack, or even if the steel 31 is overlaid to fit the hole in the bit 31, breakage may occur, or the light pick 30 may break. There were many problems with the machine itself, bit processing costs were high, and there were many problems in putting it into practical use.
In addition, for manual work that supports heavy tools such as bishan bits and allows them to be moved horizontally, vertically, and horizontally, there is a method in which the tool itself is suspended from the upper part of the old wall using a string, or as shown in Figure 4. There is a work method in which a frame on which tools are installed is moved by hydraulic or mechanical operation.

However, in the former method, the tool is suspended only by a string, which may cause the tool to move in an arc and not reach the desired location.In the latter method, the structure is large, the production costs are high, and workability is difficult. there were. This invention was made based on the above-mentioned circumstances, and uses a balancer and a blender trolley so that even heavy tools can work easily when chipping a sloped or vertical concrete wall. The weight of the gate-shaped frame was minimized, and the Bishan main body was suspended from it to reduce vibration disturbances, improve the quality of the chipping surface, save labor, and enable economical work. This provides a chipping method for concrete walls.

Hereinafter, embodiments according to the present invention will be described in detail based on FIGS. 5 and 6.

In the figure, reference numeral 1 denotes a chipping surface having an inclined surface such as an old dam, and a gate-shaped pedestal 2 is placed along the chipping surface 1. This frame 2 has a cross beam 2b fixed between the semicircularly curved tops of left and right frames 2a made of steel pipes. has been fixed through. The blend trolley 3 is suspended so as to be movable left and right on the rail 3a. The above-mentioned Brent trolley 3 is the lightest among the types of trolleys, and a balancer 4 is suspended from the trolley 3. This balancer 4 has a wire 5 for suspending the article.

The wire 5 is wound around the balancer 4 so that it can be unwound up to 25 meters at maximum, and the length of the wire 5 can be changed. A bishan bit 6, which is a chipping tool, is fixed to the lower end of the wire 5. Further, a scaffold 7 is fixed to the lower part of the pedestal 2, and is installed so as not to move into the anti-slip groove la between the new dam and the lower end of the old dam. An air hose 8 is connected to the bishan bit 6, and high pressure air is supplied from a predetermined air supply pipe. Note that 6a is a handle that allows the operator to freely move the bishan bit 6, and by grasping this handle 6a, the operator can arbitrarily move it vertically and horizontally. As described above, when performing chipping using the configured apparatus, first, the pedestal 2 is installed in the anti-slip groove la at the lower end of the chipping surface 1, and the operator holds the handle 6a of the Bishan Bit 6. The chipping is performed while being held and moved freely within the frame 2a, and when the processing within the frame 2a is completed, the work is repeated by moving the pedestal 2 to the left or right.

In addition, although we have described the treatment of a wall surface where the chipping surface 1 is inclined, in the case of a vertical wall surface, dig a hole away from the vertical wall surface, install the pedestal 2 in this hole to prevent slipping, and then install the pedestal 2. Work is carried out by leaning the machine against a vertical wall. In the above work, Brent trolley 3
moves Bishan Bit 6 to the left and right, and balancer 4
has the function of moving the bishan bit 6 up and down, and the gate-shaped pedestal 2 suspends these and is lightweight so that it can be easily moved by hand. As explained above in detail, the chipping method according to the present invention can easily chip slope walls and vertical walls using a simple device, and can improve the quality of the treated surface without causing cranking on uneven concrete surfaces. will improve. In addition, there is less vibration, which prevents industrial accidents even during long hours of work, and generates less dust, making it easy to clean up after work as prayer debris can be washed away with water. , which can improve workability.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a concrete wall surface in the conventional method.
Figure 2 is a perspective view of the chipping surface in the conventional method;
The figure is a side view showing an example of a tool used in the conventional construction method, Figure 4 is a side view showing the equipment used in the conventional construction method, Figure 5 is a side view showing the construction method according to the present invention, and Figure 6 is Figure 5. FIG. 2... Frame, 2a... Frame, 2b...
...Horizontal beam, 3... Brent trolley, 4... Balancer, 5... Wire 1, 6... Bishyan bit. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. In a method of chipping a concrete wall on a slope or vertical surface, a plain trolley is suspended from the cross beams of a gate-shaped frame consisting of left and right frames, cross beams, and scaffolding, etc. so as to be movable to the left and right, and the plain trolley is A concrete structure characterized in that a balancer is suspended from the balancer, a bisyan bit is suspended from the balancer via a wire so as to be movable upward and downward, and chipping processing is performed while the bitsyan bit is freely moved upward, downward, left, and right. Chipping method for walls.