JP6250961B2 - Method of preventing collapse of concrete utility poles during earthquake and its construction method - Google Patents

Description

  The present invention relates to a method for preventing collapse of a concrete utility pole during an earthquake and a method for its construction.

  Conventionally, as a seismic measure for concrete electric poles (for example, PC electric train poles), there has been only a limited construction method such as winding a steel plate from the outside of a concrete electric pole. These methods mainly focus on reducing damage during an earthquake.

JP 2010-193557 A JP 2011-226172 A

  Conventional seismic countermeasures for concrete utility poles have been mainly intended to reduce damage by increasing the deformation performance of utility poles. However, when an earthquake greater than expected occurs, deformation exceeding the deformation performance occurs, and the utility pole breaks.

  Moreover, in the utility pole on the viaduct, the relationship between the period of the viaduct and the period of the utility pole has a great influence on the response of the utility pole. However, the calculation of the viaduct period includes errors and may behave differently from the prediction of the utility pole response in advance.

Furthermore, the upper end of the electric pole is opened, and an opening forming step for forming an opening communicating with the hollow portion of the electric pole, and a reinforcing rod that is formed in substantially the same length as the electric pole and can be inserted into the hollow portion of the electric pole upper fixing step of fixing the reinforcing rod insertion step of inserting, a curing material supply step of introducing the curable material into the hollow portion, and a lower fixing step of fixing the reinforcing bars at the bottom of the utility pole, the upper reinforcing bars conductive pillar to And what has the opening part sealing process which seals an opening part has already been disclosed.

  Such a method of reinforcing a power pole requires a reinforcing bar having substantially the same length as that of the power pole, and is configured so that a horizontal force is shared by the reinforcing bar to improve rigidity and proof strength. And only the hardening material was thrown into the lower part of the reinforcement rod, and the fixing was not perfect.

  In 2012, the seismic design standards for railway structures were revised, and even when an earthquake that exceeds the expected level of the design occurs, crisis resistance is defined as the performance that will not cause as much damage as possible. Yes.

In view of this situation, in the present invention, by inserting the core material into the utility pole, Ductility of conductive pillar does not change, only when the emergency situation occurs, prevents the utility pole is broken Prevent the occurrence of serious events such as vehicle collisions .

  As described above, the present invention provides a method for preventing collapse of a concrete power pole during an earthquake and a construction method thereof by inserting a core material for preventing the collapse of the concrete power pole during an earthquake into the power pole. Objective.

In order to achieve the above object, the present invention provides
[1] In the seismic collapse preventing method of concrete electric pole, insert the core into the concrete electric pole, the core material is inserted only in the bottom of the concrete electric pole, fixed of the core material and the concrete electric pole is The concrete electric poles are only built in.

[ 2 ] In the method for preventing collapse of a concrete power pole during an earthquake, (a) removing the top cap of the concrete power pole, (b) inserting the core material into the concrete power pole and inserting the core material and the concrete power pole fixed performs like an anchor of the core material only Kenkomi portion of the concrete electric pole, by injecting mortar into (c) the concrete electric pole inside, performs root compaction filling of the core material, (d ) A top end cap of the concrete electric pole is attached.

  According to the present invention, the following effects can be achieved.

  (1) By inserting a rigid core material into the bottom of a concrete power pole, the concrete power pole can be prevented from collapsing.

(2) As a core material, it is necessary to have rigidity and proof strength enough to prevent the concrete power pole from overturning,
Moreover, since it is necessary to prevent a core material from collapsing at the time of a utility pole breakage, it is necessary to be fully fixed. Then, after inserting a core material into an inside of a utility pole, sufficient fixing degree is ensured by implementing construction, such as filling a mortar in a built-in part.

  Furthermore, as a construction method, it is possible to remove the cap on the upper part of the electric pole and insert the core material from the upper end of the electric pole in order not to damage the electric pole as much as possible.

  In addition, when construction is performed on a power pole built on a viaduct, construction may be performed from a side road or construction from an elevated bridge.

Is a schematic view of seismic collapse preventing method of concrete electric pole by insertion of the core material of an embodiment of the present invention. It is a schematic diagram which shows the fixing method of the core material of the concrete electric pole on the viaduct which shows the Example of this invention. It is a schematic view of a construction method for an embodiment from the side road by aerial platforms showing the concrete electric pole by insertion of the core material of the seismic collapse prevention of the present invention. Is a schematic view of a construction method for seismic collapse preventing concrete electric pole from the elevated showing an embodiment according to the insertion of the core material out by aerial of the present invention.

Seismic collapse preventing method of concrete made electric pole of the present invention, by inserting the core into the concrete electric pole, the core material is inserted only in the bottom of the concrete electric pole, fixed of the core material and the concrete electric pole Was made only in the building part of the concrete electric pole .

Further, in the construction method for preventing collapse of a concrete power pole during an earthquake, (a) the top cap of the concrete power pole is removed, (b) a core material is inserted into the concrete power pole, and the core material and the concrete power pole are For fixing, the core material is erected only in the erected portion of the concrete electric pole, (c) the core material is solidified by pouring mortar into the concrete electric pole, and (d) Install the top cap of the concrete utility pole .

  Hereinafter, embodiments of the present invention will be described in detail.

Figure 1 is a schematic view of seismic collapse preventing method of concrete electric pole by insertion of the core material of an embodiment of the present invention, FIG. 1 (a) shows a concrete electric pole, FIG. 1 (b) Concrete The figure which shows the state which inserted the core material in the construction part of the electrical pole, FIG.1 (c) shows the state which inject | poured mortar into the construction part of the concrete electrical pole, and integrated the core material and the concrete electrical pole. FIG.

In this figure, 1 is concrete electric pole, 2 cavities of the concrete electric pole 1, 3 Kenkomi portion, 4 is a core member which is inserted from the bottom of the cavity 2 to about 3m. Reference numeral 5 denotes a mortar that is injected into the built-in portion 3 after inserting the core material 4.

  Thus, since the concrete electric pole 1 becomes the cavity 2, after inserting the core material 4 into the built-in part 3 of the cavity 2, the mortar 5 is injected, and the core material 4 is inserted into the built-in part of the cavity 2. Hold at 3.

Figure 2 is Ri schematic diagram showing a method of fixing the core material of the concrete electric pole on a high crosslinking illustrating an embodiment of the present invention, the core 14 to Kenkomi portion 13 of the concrete electric pole 12 embedded in the viaduct 11 The core material 14 is fixed to the erected portion 13 only by the mortar 15 .

Figure 3 is a schematic view of a construction method for an embodiment from the side road by aerial platforms showing the concrete electric pole by insertion of the core material of the seismic collapse prevention of the present invention, FIG. 3 (a) altitude Fig. 3 (b) is a diagram showing the removal of the top end cap of a concrete utility pole by a work vehicle, Fig. 3 (b) is a diagram showing the construction of the core material on the concrete utility pole, and Fig. 3 (c) is the root of the concrete utility pole by mortar. FIG. 3 (d) is a diagram showing the restoration of the top end cap of the concrete electric pole.

  First, as shown in FIG. 3A, the top end cap 24 of the concrete electric pole 23 built in the built-in portion 22 is removed by the aerial work vehicle (truck type h = 20 m) 21.

  Next, as shown in FIG.3 (b), the core material 26 is built in the built-in part 22 of the built-in concrete electric pole 23 with the rough terrain crane (10t suspension) 25. As shown in FIG.

  Next, as shown in FIG.3 (c), the mortar 28 is inject | poured in the concrete electric pole 23 from the mortar bucket 27, and the core material 26 is solidified.

  Finally, as shown in FIG. 3D, the top cap 24 of the concrete power pole 23 is attached.

  In this way, the concrete electric pole is prevented from collapsing at the time of an earthquake from a side road by an aerial work vehicle.

Figure 4 is a schematic view of a construction method for the on elevated illustrating an example of a concrete electric pole by insertion of the core carried out by aerial Seismic collapse prevention of the present invention, FIG. 4 (a) High Fig. 4 (b) is a diagram showing the construction of the core material on the concrete utility pole by the track crane, and Fig. 4 (c) is the concrete utility pole. Fig. 4 (d) is a diagram showing attachment of a top end cap of a concrete electric pole.

  First, as shown in FIG. 4A, the top end cap 34 of the concrete electric pole 33 built in the built-in portion 32 is removed by an aerial work vehicle (truck type h = 20 m) 31.

  Next, as shown in FIG. 4 (b), the core material 36 is built by the track crane 35 into the built-in portion 32 of the built concrete electric pole 33.

  Next, as shown in FIG.4 (c), the mortar 38 is inject | poured in the concrete electric pole 33 from the mortar bucket 37, and the core material 26 is solidified.

  Finally, as shown in FIG.4 (d), the top end cap 34 of the concrete electric pole 33 is attached.

  In this way, a construction method for preventing collapse of a concrete electric pole during an earthquake is applied from an elevated work vehicle to an elevated work vehicle.

  ADVANTAGE OF THE INVENTION According to this invention, the seismic reinforcement of a concrete electric pole can be implemented with a simple structure, a collapse prevention construction method, and its construction method.

It is a method of embedding a core material inside a concrete power pole so that the train traveling space will not be disturbed even when an unexpected earthquake acts and the power pole breaks .

  In concrete utility poles on the viaduct, although the relationship between the frequency of the viaduct and the frequency of the utility pole has a dominant influence on the response of the utility pole, there are actually more or less errors in the calculation results of the frequency of the viaduct. However, according to the present invention, there is an advantage that it is possible to sufficiently cope with such a case.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The method of preventing collapse of a concrete electric pole by earthquake by inserting the core material of the present invention and the construction method thereof are the method of preventing collapse of a concrete electric pole at the time of earthquake by inserting a core material to prevent collapse of the concrete power pole at the time of earthquake, and It can be used as the construction method.

1,12,23,33 Concrete electric pole 2 Cavity part of concrete electric pole 3,13,22,32 Built-in part 4,14,26,36 Core material (H steel, round bar)
5, 15, 16, 28, 38 Mortar 11 Viaduct 21, 31 Aerial platforms 24, 34 Top cap 25 Rough terrain crane 27, 37 Mortar bucket 35 Rail crane

Claims (2)

Insert the core into the concrete electric pole, the core material is inserted only in the bottom of the concrete electric pole, fixed of the core material and the concrete electric pole is that it has only to Kenkomi portion of the concrete electric pole A method for preventing collapse of concrete utility poles during earthquakes. In the method of preventing collapse of concrete power poles during earthquakes,
(A) Remove the top cap of the concrete utility pole,
(B) The core material is inserted into the concrete power pole and the core material and the concrete power pole are fixed, and the core material is built only in a built-in portion of the concrete power pole .
(C) By filling mortar into the concrete electric pole, the core material is solidified and filled;
(D) A method for preventing collapse of a concrete utility pole during an earthquake, comprising attaching a top end cap of the concrete utility pole.