JP6963318B2 - How to confirm the position of the concrete side block joint in the split manhole - Google Patents

Description

The present invention relates to a structure and a method for confirming the position of a concrete side block joint so that the position of the joint of the laminated concrete side blocks in the split manhole can be easily confirmed.

As a rehabilitation method for rehabilitating a manhole that has deteriorated due to deterioration over time, fatigue due to the load of a passing vehicle, vibration, etc., a rehabilitation method for forming a reinforcing layer on the inner surface of an existing manhole, for example, is shown in Patent Document 1. As described above, a synthetic resin reinforcing tubular body having an outer diameter smaller than the inner diameter of the human hole is inserted into the existing manhole in an upright position, and the inner peripheral surface of the manhole and the outer peripheral surface of the reinforcing tubular body are inserted. A rehabilitation method is known in which a cement-based mortar or a resin-based mortar is injected into the gap between the manhole and the manhole to form a reinforcing layer.

Further, as an earthquake response method for protecting an existing manhole from an earthquake, for example, as shown in Patent Document 2, a peripheral groove portion is formed along a joint portion of laminated concrete side blocks in a divided manhole, and the peripheral groove portion is formed. There is known a method of filling and sealing with an elastic adhesive that shears at least with a force weaker than the destruction of the concrete side block.

Further, as a structure for preventing the manhole from rising due to the liquefaction of the ground during an earthquake, the existing manhole has a ground on the wall of the manhole, for example, as shown in Patent Document 3. A through hole that communicates between the inside and the inside of the manhole is formed, the through hole allows the flow of water from the underground side to the inside of the manhole, and the water field flow is always blocked from the inside of the manhole to the inside of the manhole. A manhole floating prevention structure in which a stop valve is arranged is known.

JP-A-2017-197941 Japanese Unexamined Patent Publication No. 2014-58844 Japanese Unexamined Patent Publication No. 2006-124966

However, since the manhole rehabilitated by the rehabilitation method described in Patent Document 1 has a rehabilitation structure in which the inner peripheral surface of the manhole is covered with a reinforcing layer, the rehabilitated manhole is a divided manhole. In this case, the joint portion of the laminated concrete side mass cannot be confirmed from the outside.

Therefore, when the earthquake response method shown in Patent Document 2 is to be applied to the existing rehabilitated split manhole, the joint portion of the laminated concrete side mass in the split manhole cannot be confirmed from the outside. There was a problem that it was difficult to implement the earthquake response method.

Further, when an attempt is made to carry out the construction of the rehabilitated existing manhole to have the levitation prevention structure shown in Patent Document 3, if the manhole is a divided manhole, a through hole formed in the wall portion of the manhole. It is necessary to avoid the joints of the concrete side lumps at the position of, but there was a problem that the joints of the laminated concrete side lumps could not be confirmed from the outside, making it difficult to construct a floating prevention structure. ..

An object of the present invention is to provide a method for confirming the position of a concrete side block joint portion so that the position of the joint portion of the laminated concrete side block in the split manhole after rehabilitation can be easily confirmed.

In order to achieve the above object, the invention according to claim 1 is a method for confirming the position of a concrete side block joint in a split human hole, and a metal marker is attached to the joint of the laminated concrete side blocks. It is characterized in that the metal marker is detected by a metal detector and the position of the joint portion of the laminated concrete side mass is confirmed.

According to the invention of claim 1 , a metal marker is arranged at the joint portion of the laminated concrete side mass, and the metal marker is detected by a metal detector. The position of the joint portion of the concrete side block can be confirmed.

As described above, according to the method for confirming the position of the concrete side block joint in the split manhole according to the present invention, the position of the joint of the laminated concrete side blocks can be confirmed, and thus the material has been rehabilitated. It is possible to easily carry out the construction by the earthquake response method of the existing split manhole and the construction to make the levitation prevention structure.

It is sectional drawing which shows the 1st example of the structure corresponding to the position confirmation of the concrete side block joint part in the split manhole which concerns on this invention. It is a partially enlarged view of FIG. It is sectional drawing which shows the 2nd example of the structure corresponding to the position confirmation of the concrete side block joint part in the split manhole which concerns on this invention. It is a partially enlarged view of FIG. It is explanatory drawing which shows an example of the position confirmation method of the concrete side mass joint part in the split manhole which concerns on this invention.

Hereinafter, an example of an embodiment of a structure and a confirmation method for confirming the position of the concrete side block joint in the split manhole according to the present invention will be described in detail.
1 and 2 show the first example of the embodiment of the structure corresponding to the position confirmation of the concrete side mass joint in the split manhole according to the present invention, and FIG. 1 shows the concrete in the split manhole of the first example. A cross-sectional view showing a structure corresponding to position confirmation of the side block joint, FIG. 2 is a partially enlarged view of FIG. 1.

In the first example, the metal marker 4 is arranged at the joint portion 3 of the laminated concrete side lumps 2 constituting the split human hole 1. The metal marker 4 is not particularly limited as long as it is a metal that can be detected by a metal detector.

In the arrangement of the metal marker 4 on the joint portion 3, in this example, a hole is drilled in the joint portion 3 of the concrete side block 2 from the inner surface side of the split manhole 1 with a drill or the like, and the metal marker 4 is placed in the hole. It is embedded and placed. A plurality of metal markers 4 to be arranged on the joint portion 3 are preferably arranged in the circumferential direction of the joint portion 3, and three or more are particularly preferable. In this example, four metal markers 4 are arranged at equal intervals in the circumferential direction of the joint portion 3.

3 and 4 show a second example of the embodiment of the structure corresponding to the position confirmation of the concrete side mass joint in the split manhole according to the present invention, and FIG. 3 shows the concrete in the split manhole of the second example. A cross-sectional view showing a structure corresponding to position confirmation of the side block joint, FIG. 4 is a partially enlarged view of FIG.
The structure for confirming the position of the concrete side block joint in the split manhole of the second example is the same as that of the first example in the basic configuration, and the same configuration as that of the first example will be described with the same reference numerals. ..

The difference between the second example and the first example is that in the second example, the split manhole 1 is an earthquake-responsive split manhole 1. The split manhole 1 of the second example has elasticity of forming a peripheral groove portion 5 along the joint portion 3 of the laminated concrete side lumps 2 and shearing the peripheral groove portion 5 with a force at least weaker than the fracture of the concrete side lump 2. The adhesive 6 is filled and sealed.

In the second example, the metal marker 4 is embedded in the elastic adhesive 6 filled in the peripheral groove portion 5 formed along the joint portion 3 of the laminated concrete side lumps 2, and the metal marker 4 is attached to the joint portion 3. It is placed in.
The arrangement of the metal marker 4 and the metal marker 4 is the same as that of the first example.

According to the structure for confirming the position of the concrete side block joint in the divided manholes of the first and second examples configured in this way, the inner peripheral surface of the divided manhole 1 is covered with a reinforcing layer. Even when the joint portion 3 of the laminated concrete side mass 2 cannot be visually confirmed from the outside, the method for confirming the position of the concrete side mass joint portion in the split manhole of the present invention described below. Therefore, the position of the joint portion 3 of the laminated concrete side lumps 2 can be confirmed.

FIG. 5 is an explanatory view showing a method of confirming the position of the concrete side block joint in the split manhole according to this example.
The method for confirming the position of the concrete side block joint in the split human hole of this example is a rehabilitation structure provided with a structure for confirming the position of the joint 3 of the concrete side block 2 and the inner peripheral surface is covered with the reinforcing layer 7. This is a method of confirming the position of the joint portion 3 of the concrete side block 2 in the split human hole 1 of the first example, and as shown in FIG. 3, a metal detector 8 is carried into the split human hole 1 to emit electromagnetic waves. The metal marker 4 that is generated and arranged at the joint portion 3 of the concrete side block 2 is detected, and the position of the joint portion 3 of the concrete side block 2 is confirmed by the position of the detected metal marker 4.

Although not shown, the position confirmation of the joint portion 3 of the concrete side block 2 in the split manhole of the second example is also confirmed in the same manner as the confirmation of the position of the joint portion 3 of the concrete side block 2 in the split manhole of the first example. do.

According to the structure for confirming the position of the concrete side block joint and the confirmation method in the split human hole according to the present invention configured as described above, the structure for confirming the position of the concrete side block joint is the laminated concrete side block. Since it has a simple structure such as arranging a metal marker 4 at the joint portion 3 of 2, the construction work is easy.

Then, to confirm the position of the concrete side block 2 joint 3 in the split manhole 1 after rehabilitation, the metal detector 8 is carried into the split manhole 1 and an electromagnetic wave is generated to generate an electromagnetic wave to confirm the position of the concrete side block 2 joint 3. The position of the joint portion 3 of the concrete side block 2 can be easily and accurately confirmed by a simple operation such as detecting the metal marker 4 arranged in the concrete side block 2.

1 Divided manhole 2, 2 Concrete side block 3 Joint 4 Metal marker 5 Circumferential groove 6 Elastic adhesive 7 Reinforcing layer 8 Metal detector

Claims (1)

A feature is that a metal marker is placed at the joint of the laminated concrete side ingots, the metal marker is detected by a metal detector, and the position of the joint of the laminated concrete side ingots is confirmed. How to confirm the position of the concrete side block joint in the split human hole.

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