JP2005350954A - Web member replacement examination system of web member replacement method of steel tower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a replacement method of a web member required to exchange because of corrosion or the like which is not conventionally aimed at examination. <P>SOLUTION: The web member replacement method of a steel tower is so constituted that a web member replacement device is mounted on a position different from a mounting point of the web member in the vicinity of the web member required to exchange because of corrosion, etc. from the existing steel tower and that the web member is removed after the web member replacement device has been installed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a steel tower abdomen replacement method and a steel tower abdomen replacement examination system.

  The steel tower is composed of a main pillar material, a horizontal material, a belly material made of diagonal material, and the like, but the present invention relates to replacement of the abdominal material.

  As a method for performing assembly analysis of a steel tower, there is JP-A-2000-230344 “Three-dimensional design method for tower-shaped truss structure” (Applicant: Nippon Electric Furnace Co., Ltd.). This is a three-dimensional analysis method for steel towers that examines the stress and strength acting on existing steel tower members.

  In addition, as a means of examining the stress and strength acting on a specific member based on the structural dimensions and member data of a steel tower, Japanese Patent Application Laid-Open No. 2002-324087 “Steel Tower Design and Diagnosis System” (Applicant: Chubu Electric Power Co., Inc., Aichi Metals) Industrial Corporation).

Furthermore, the stress analysis of the tower-shaped truss structure is conducted and the strength is examined by the total stress degree of the bending moment and the axial force generated in the member. Japanese Patent Application Laid-Open No. 2000-322467 “Steel Tower Design / Diagnostic System” (Applicant) : Shimizu Corporation).
JP 2000-230344 A JP 2002-324087 A JP 2000-322467 A

  As described above, a design / diagnosis system for a steel tower is generally used.

  The present invention is a power transmission tower abdominal material replacement device that removes abdominal material that has not been previously targeted, and a power transmission tower abdominal material removal that performs a three-dimensional analysis of stress and strength examinations with the abdominal material replacement device attached. A replacement study system is an issue.

  The present invention provides a construction method for replacing a bellows that has been required to be replaced due to corrosion or the like that has not been targeted in the past. The abdominal material replacement device was installed at a position different from the abdomen, and after the abdominal material replacement device was installed, the abdominal material was removed.

  In addition, the present invention attaches the abdominal material replacement device to the existing steel tower, removes the abdominal material from the existing steel tower, the stress acting on the peripheral material of the abdominal material replacement device and the abdominal material replacement device, and the abdominal material replacement corresponding to the stress. An abdominal material replacement study system for a steel tower that examines the strength of the replacement device and peripheral members.

  Furthermore, the present invention provides a method for replacing the abdominal material by attaching the abdominal material replacement device to the existing steel tower, removing the abdominal material from the existing steel tower, and using the abdominal material replacement device as a reinforcing material in the vicinity of the insufficient strength abdominal material. In order to examine the stress acting on the peripheral members of the device and the abdominal material replacement device and the strength of the abdominal material replacement device and the peripheral member corresponding to the stress, the strength of the abdominal material replacement device as a reinforcing material in the vicinity of the insufficient strength abdominal material An abdomen of a tower that is installed at a position different from the attachment point of the missing abdomen and examines the stress acting on the abdomen replacement device and the peripheral members around the abdomen replacement device, and the strength of the abdomen replacement device and the peripheral members against the stress A material replacement study system was adopted.

  As described above, the present invention attaches the abdominal material replacement device at a position different from the attachment point of the abdominal material in the vicinity of the abdominal material in which it is necessary to replace the existing steel tower due to corrosion or the like. Since this is a steel tower abdominal material replacement method in which the abdominal material is removed after that, the abdominal material replacement device can be attached to the existing steel tower and the abdominal material can be removed from the existing steel tower.

  In addition, the present invention attaches the abdominal material replacement device to the existing steel tower, removes the abdominal material from the existing steel tower, stress acting on the peripheral material around the abdominal material replacement device and the abdominal material replacement device, and the abdominal material recovery against the stress. Since it is a steel tower abdominal material replacement examination system that examines the strength of the replacement device and peripheral members, the stress acting on the peripheral member of the abdominal material replacement device and the abdominal material replacement device, and the abdominal material replacement device corresponding to the stress, The strength of peripheral members can be examined.

  Further, the present invention provides a peripheral member around the abdominal material replacement device and the abdominal material replacement device, in which the abdominal material replacement device is attached to a position different from the attachment point of the insufficient strength abdominal material as a reinforcing material in the vicinity of the insufficient strength abdominal material. And the stress acting on the peripheral members of the abdominal material replacement device and the abdominal material replacement device, because it is the abdominal material replacement examination system of the steel tower that examines the strength of the abdominal material replacement device and the peripheral member against the stress, The strength of the abdomen replacement device and the peripheral members corresponding to the stress can be examined.

  The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings.

  The work flow of the steel tower abdominal material replacement construction method and the steel tower abdominal material replacement examination system of the present invention is shown in FIG.

  2 is a front view of an existing power transmission tower having an abdomen that needs to be replaced due to corrosion or the like, FIG. 3 is an enlarged front view of the main part of FIG. 2, and FIG. 4 is a plan view of the main part of FIG.

  5 and 6 are perspective views showing the abdominal material replacement method for the steel tower of the present invention.

  The existing steel tower is composed of a main pillar material 21, a horizontal material, an abdominal material made of diagonal material, and the like.

  In the existing steel tower, as shown in FIG.

  Then, it is necessary to replace the corroded stomach material 22 with a new member.

  It is necessary to remove the corroded stomach material 22.

  In order to easily remove the mounting bolts of the corroded abdomen 22, the abdomen replacement device 23 is attached.

  The corrosion abdomen 22 is provided between the node 24 and the node 25, and in order to remove the corrosion abdomen 22, the abdomen replacement device 23 is arranged in parallel to the corrosion abdomen 22 in the vicinity of the corrosion abdomen 22. Then, the attachment points 41 and 42 at both ends thereof are attached to positions different from the nodes 24 and 25 of the corroded web 22. An example of the abdomen replacement device 23 is one in which contact plates are provided at both ends of a hydraulic cylinder, the main pillar material 21 is gripped by the contact plates, and the contact plates are screwed with bolts. The contact plate and the hydraulic cylinder are pin-coupled, and can be attached at an arbitrary angle, and can be adjusted to an arbitrary length by expansion and contraction of the hydraulic cylinder, so that it can be applied to various forms of members.

  Subsequently, after the abdominal material replacement device 23 is attached, the corroded abdominal material 22 is removed.

  A part of the stress is borne by the abdominal material replacement device 23 because the stress borne by the corroded stomach material 22 is removed.

  Since the abdominal material replacement device 23 is attached and the corroded stomach material 22 is removed and the tower structure is changed, the stress of the peripheral material around the abdominal material replacement device 23 and the abdominal material replacement device 23 is the original design value. To be different.

  Therefore, it is necessary to examine the strength of the abdominal material replacement device 23 and its peripheral members.

  Therefore, the stress of the abdominal material replacement device 23 and peripheral members must be obtained by a three-dimensional analysis.

  The strength of the abdomen replacement device 23 and its peripheral members must be examined for stress.

  As a result, when there is an abdominal material 26 with insufficient strength as a peripheral member, the abdominal material replacement device 27 is attached as a reinforcing material in the same manner as the abdominal material replacement device 23.

  Since the steel tower structure changes because the abdominal material replacement device 27 is attached, the stress of the peripheral members of the abdominal material replacement device 27 is different from the original design value, and the strength of the abdominal material replacement device 27 and the peripheral members needs to be examined. Therefore, the stress of the abdominal material replacement device 27 and the peripheral members must be obtained by three-dimensional analysis, and the strength of the stress must be examined.

  The present invention is not limited to the arrangement of the abdominal material replacement device in parallel with the corroded abdominal material, but may be other than the parallel arrangement as shown in FIG.

  When there is a corroded belly 43 shown in FIG. 6 and an abdominal material 44 to be removed together with the corroded belly 43, the abdominal material replacement devices 28, 29, and 30 have the corroded belly 43 and the removable belly 44. It is not arranged in parallel with. There are provided abdominal material replacement devices 28, 29 and 30 as shown which are not parallel to the corroding abdominal material 43 and the removing abdominal material 44 which must be removed together with the corroding abdominal material 43. The abdomen replacement devices 28, 29, and 30 are attached at positions where the corroded abdomen 43 is different from the nodes 31, 32, 33, and 34 at both ends of the removed abdomen 44.

  Next, an abdominal material replacement examination system for a steel tower will be described using the system flow of FIG.

  As advance preparations, the study will start based on the steel tower structure diagram, actual longitudinal section, actual plan view, and member replacement construction plan.

  Enter the line conditions of span, height difference of support point, line type, overhead wire state, maximum working tension at tower design, set temperature, wind speed, construction temperature, and wind speed.

  Next, the steel tower structure data and member / bolt data steel tower structure are input.

  Furthermore, the setting of the replacement member for the arrangement of the removal material and the abdomen replacement device is performed.

  The attachment position of the abdominal material replacement device 27 is set by the operator using the mouse using the graphic function.

  Perform 3D stress analysis of the abdominal material replacement device 28, 29, 30 and peripheral members, and examine the strength of the abdominal material replacement device 28, 29, 30, peripheral members and bolts, and confirm the safety factor of the tower. Do.

  If confirmation of the safety factor is OK, the study is completed and construction is performed.

  In the confirmation of the safety factor, if it is NG, a reinforcing material is arranged, if it is OK, a stress analysis is performed, and if the arrangement of the reinforcing material is NG, the process is stopped.

  The present invention relates to an abdominal material replacement construction method for a steel tower and an abdominal material replacement examination system for a steel tower, but can be used for an abdominal material replacement construction method for a transmission tower and an abdominal material replacement examination system for a transmission tower.

It is a work flow of the abdominal material replacement construction method of the steel tower of this invention, and the abdominal material replacement examination system of a steel tower. It is a front view of the existing power transmission tower which has an abdominal material which needed to be replaced by corrosion etc. of the present invention. It is an enlarged front view of the principal part of FIG. It is a top view of the principal part of FIG. It is a perspective view which shows the abdominal material replacement construction method of the steel tower of this invention. It is a perspective view which shows the abdominal material replacement construction method of the steel tower of this invention. It is a figure which shows the system flow of the abdominal material replacement | exchange examination of the steel tower of this invention.

Explanation of symbols

22.43 ... Corrosion belly (example of belly)
26 ... abdomen with insufficient strength (example of abdomen)
27.44 ... Removed abdomen (example of abdomen)
23, 27, 28, 29, 30 ... Abdomen replacement device

Claims (3)

  In the vicinity of the abdominal material that had to be replaced due to corrosion in the existing steel tower, the abdominal material replacement device was installed at a position different from the attachment point of the abdominal material, and after the abdominal material replacement device was installed, the abdominal material was removed. Steel tower abdomen replacement method.   Attach the abdominal material replacement device to the existing tower, remove the abdominal material from the existing steel tower, the stress acting on the peripheral members around the abdominal material replacement device and the abdominal material replacement device, and the abdominal material replacement device and peripheral members against the stress An abdominal material replacement examination system for steel towers to examine strength. Install the abdomen replacement device in the vicinity of the insufficient strength abdomen as a reinforcing material at a position different from the attachment point of the insufficient strength abdomen and the stress acting on the peripheral members around the abdomen replacement device and the abdomen replacement device, and stress Abdominal material replacement system for steel towers to examine the strength of the peripheral material replacement device and peripheral members.

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