JP4097098B2 - How to remove underground objects - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to removal how the underground installations such as receiving frame of a manhole.
[0002]
[Prior art]
Manhole structures installed on the road are distorted and deteriorated due to long-term use, resulting in deterioration of material strength. Old manhole structures will be replaced and repaired.
[0003]
As a repair and maintenance method for manhole structures, there is a method (Japanese Examined Patent Publication No. 63-55562) in which a paving plate is cut by rotating a circular cutter, and the receiving frame of the manhole cover is removed and replaced in a short time.
[0004]
[Problems to be solved by the invention]
There has been a demand for lowering and speeding up noise when cutting a paving plate, and increasing the integration of the restored paving plate and the old paving plate. The pulling machine does not generate noise, but it is removed so as to peel off the pavement plate, so the cut surface is not torn and uniform, it takes time to restore the pavement plate, and the restored pavement plate and the old pavement plate are integrated However, there was a problem that it was not enough and it was easily deformed after the opening of traffic.
[0005]
The object of the present invention is to cut the pavement plate quickly with low noise, the cut surface is uniform, the restored pavement plate and the old pavement plate are integrated, and the road surface is not deformed after the traffic is opened. Is to do.
[0006]
[Means for Solving the Problems]
Therefore, the underground buried object removing method of the present invention is configured as a means in which a cutting groove 2a that does not penetrate the pavement plate P is formed around the underground buried object 51 from the road surface of the pavement plate P, and the underground buried object 51 is formed. A jack provided on the frame 11 with the base 12 of the frame 11 disposed above the surface of the frame 11 facing the road surface around the underground buried object 51 and the tip of the reaction rod 4 engaged with the underground buried object 51. 3, the reaction force rod 4 is pulled up to simultaneously lift and remove the underground buried object 51 and the cut pavement plate Px integrated with the underground buried object 51 .
[0007]
In a preferred embodiment of the present invention, the cutting process of the pavement plate is configured to be cut by press-fitting the cutting blade into the pavement plate in order to reduce noise, and at that time , the cutting blade is inclined inward to the pavement plate. It is good to make it easy to press fit . According to this, since the cut surface is an inclined surface, the integrity of the restored paving plate and the old paving plate can be enhanced. Moreover, lever applying vibration and / or swing during press-fitting of the cutting blade, thereby facilitating the cutting of the pavement. If the cutting blade is made into a triangular tooth or the teeth are provided at intervals, it will be easy to bite into the paving plate . However, it is needless to say that the present invention is not limited to the configuration of the embodiment .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a sectional view of a press-fitting device 1 and a cutting blade 2 used in the present invention.
[0009]
The cutting blade 2 is circular, and a flange 21 for receiving pressure input is provided on the upper part. The cutting blade 2 is inclined inwardly and is tapered, and has a configuration as shown in FIG. 3 (A), and also has a triangular tooth at the tip as shown in FIG. 3 (B). 22 2008 may be provided continuously. The shape of the teeth, as shown in FIG. 3 (C), square, may be trapezoidal as appropriate shape. It is preferable to reduce the wear of the teeth by forming the cutting blade by making only the tooth portion made of super high alloy.
[0010]
The press-fitting device 1 includes a frame 11, a center hole jack 3 and a reaction rod 4 provided at the center. The frame 11 includes a leg 14 that connects a circular base 12 and an upper frame 13.
[0011]
The reaction rod 4 is provided with a breaking device 41 at the tip. In the example shown in the figure , the breaking device 41 has a cross shape and a wedge-shaped tip, and expands and contracts in the lateral direction, so that the underground buried object 51 to be removed, for example, the receiving frame 51 of the lid (not shown) of the manhole 5 is removed. Dig into the side.
[0012]
Alternatively, an engagement tool that engages with the inner wall surface of the underground buried object 51 may be provided at the tip of the reaction force rod 4. Force is applied to the underground object 51. The reaction rod 4 may be configured to be extendable and retractable so as to correspond to the embedment depth of the underground burying object 51. However, in the illustrated example, an extension coupler 42 is provided .
[0013]
Based on Figures 1 and 2 will be described for the case of removing the receiving frame 51 of the further detail manhole 5. The cutting blade 2 is installed so as to surround the manhole 5 including the receiving frame 51 to be removed, and the press-fitting device 1 is placed on the flange 21 of the cutting blade. The reaction rod 4 is lowered into the manhole, the breaking device 41 at the tip is extended in the lateral direction, and the tip is cut into the lower side of the receiving frame 51 to be removed, and the reaction force when the cutting blade 2 is press-fitted is taken into the manhole.
[0014]
When the center hole jack 3 of the press-fitting device 1 is operated and the reaction force rod 4 is pulled upward, the cutting blade 2 penetrates the pavement plate P from the road surface . Since the breaking device 41 bites into the receiving frame 51, a reaction force is obtained from the receiving frame 51. Since the cutting blade 2 is inclined inward and pushes the inner pavement plate P upward, penetration is easy. As shown in FIG. 1, the length L of the cutting blade 2 extending downward from the flange 21 with respect to the thickness T of the pavement plate P is formed such that T> L.
[0015]
Further, when the press-fitting is continued, the pavement plate P is cut as shown in FIG. 2, and a cut surface by the inclined cutting groove 2a is obtained. As described above, since the thickness T of the paving plate P and the length L of the cutting blade 2 are T> L, the cutting groove 2a does not penetrate the paving plate P, but the paving plate P is cut in this way. Then, the pulling force by the center hole jack 3 is transmitted from the breaking device 41 to the receiving frame 51, and the receiving frame 51 and the cut pavement plate Px are pulled up and removed together.
[0016]
After the existing receiving frame 51 is removed, the periphery of the manhole is cleaned, and the installation position of the new receiving frame is adjusted with the height adjusting material. The fine adjustment of the height is performed by the thickness of the resin concrete located on the upper surface of the adjusting material when the rapid hardening resin concrete is filled.
[0017]
Thus, the ring-shaped space formed in the trace from which the paving slab P is removed in the cutting / removing step is paved with rapid-hardening resin concrete and rolled with an arc compactor.
[0018]
【The invention's effect】
According to the present invention described in claim 1, from the state in which the cutting groove 2 a is formed on the road surface of the pavement plate P around the underground buried object 51, the underground buried object 51 and the cutting integrated with the underground buried object 51. The pavement plate Px can be pulled up and removed at once.
That is, the base 12 of the frame 11 arranged above the underground buried object 51 is faced to the road surface around the underground buried object 51, and the tip of the reaction rod 4 provided on the frame 11 is engaged with the underground buried object 51. In the state, the reaction rod 4 is moved up by the jack 3 to pull up the underground buried object 51 using the reaction force, so that the cutting groove 2a does not penetrate the pavement plate P. There is an effect that the underground buried object 51 and the cut pavement plate Px around the underground buried object 51 can be simultaneously pulled up and removed in an integrated state .
[0019]
And according to this invention of Claim 2, since the cut surface of the pavement plate P by the cutting groove 2a becomes an inclined surface, and the restoration pavement plate is constructed so as to rest on the slope of the old pavement plate, the old and new there is an effect that pavement is integrated.
Can
[Brief description of the drawings]
1 is a cross-sectional view showing a cutting step of the present invention.
FIG. 2 is a cross-sectional view showing a pulling and removing process of the present invention .
3 is a front view showing the respective embodiments of the cutting blade.
[Explanation of symbols]
P Pavement plate Px Cutting pavement plate 2 Cutting blade 2a Cutting groove 3 Jack 4 Reaction force rod 5 Manhole 12 Base 14 Leg 41 Breaking device 51 Receiving frame (underground buried object)

Claims (2)

Underground installations (51) said pavement from a road surface of pavement around (P) and (P) to form a cut groove which does not penetrate (2a) of the frame arranged above the underground installations (51) (11 a base (12) of) to face the road surface around the underground installations (51), in a state where the tip of the reaction force rod (4) engaged in underground installations (51), said frame (11) by raising the reaction force rod (4) provided with a jack (3), the underground buried object (51) and該地under buried object (51) to the integrated cutting pavement to (Px) at the same time pulling removed An underground buried removal method characterized by that . The underground buried object removing method according to claim 1, wherein the cutting groove (2a) is formed so as to be inclined downward and inward from the road surface .

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