JPH0348989B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In order to peel and dismantle the surface layer of a reinforced concrete structure, etc., slits of a predetermined depth are provided in the surface layer at appropriate intervals, and a wedge is press-fitted into the slit. In the method of stripping and demolishing blocks between each slit, the reinforcing bars, etc. that are buried in the structure body and perpendicular to the stripping surface are first fused and removed so that the subsequent stripping and dismantling work can be easily performed. The present invention relates to a method for peeling and dismantling the surface layer of reinforced concrete structures, etc., which is characterized by:

When peeling and dismantling the surface layer of a concrete structure, for example, as shown in Fig. 5, slits b of a predetermined depth are formed at appropriate intervals from the surface layer a, and wedges c are press-fitted into the slits to open the slits. We have previously developed a method in which a crack d is created at the bottom of the slit by pushing it open, and the concrete on the slit side is peeled off in blocks. As shown, if a reinforcing bar e is buried perpendicular to the peeling surface, it will be impossible to peel and dismantle it unless this reinforcing bar is removed. In order to enable peeling and dismantling even in such cases, the present invention first investigates and confirms the buried location of reinforcing bars using a detector or the like before starting the work, and then uses metal thermite or other flame construction methods or other appropriate means to remove the buried reinforcing bars. It is characterized by being dismantled and disassembled using a wedge device after dissolution and removal, and its configuration will be explained with reference to the embodiments shown in the drawings. In Figs. 1 to 3, 1 is a reinforced concrete structure, 2
indicates reinforcing bars buried inside the peeled area and perpendicular to the peeled surface. If there are reinforcing bars etc. buried in the area to be removed in this way, after confirming the location with a metal detector etc., use metal thermite A etc. to remove the upper part of it with concrete as shown in Figure 2. A melting hole 3 is provided by dissolving and removing reinforcing bars and the like from the surface to a position slightly deeper than the depth at which the concrete should be peeled off. Next, as shown in Fig. 3, slits 4 of a predetermined depth are provided vertically and horizontally at appropriate intervals in the area to be peeled, and by press-fitting a wedge 5 into the slits 4, the slits are aligned in the direction of the arrow. By pushing it open, a crack 6 is created at the bottom, and from this part it can be easily peeled off and dismantled into blocks.

As described above, according to the construction method of the present invention, even if reinforcing bars, etc. are buried inside the part of the surface layer of a reinforced concrete structure that should be peeled off and demolished, the reinforcing bars, etc. can be dissolved and removed in advance. Peeling and demolition work can be easily and reliably performed at a predetermined location by simply press-fitting a wedge into the slit without encountering resistance from reinforcing bars or the like.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of dissolving and removing reinforcing bars, etc. in the construction method of the present invention, Fig. 2 is a partially cutaway front view during dissolution of reinforcing bars, etc., Fig. 3A is a partially cutaway front view of the peeling mode using a wedge, The same figure is a plan view with slits, FIG. 4 is a partially cutaway front view showing how the reinforcing bar buried portion is peeled off using a wedge, and FIG. 1...Reinforced concrete structure, 2...Reinforced steel,
3...Dissolution hole, 4...Slit, 5...Wedge, 6...
...Crack, A...metal thermite.

Claims (1)

[Claims] 1. When peeling and dismantling the surface layer of a reinforced concrete structure, etc., reinforcing bars, etc. buried inside the structure perpendicular to the peeled surface are removed from the surface of the structure by flame construction methods such as metal thermite to a specified depth along with the concrete. Reinforced concrete structures, etc. that are characterized by removing and dismantling blocks between the slits by press-fitting wedges into slits provided vertically and horizontally at a predetermined depth from the surface after dissolving and removing the structure. Surface peeling and demolition method.