CN111005617A - Method for dismantling V-shaped guyed tower - Google Patents
Method for dismantling V-shaped guyed tower Download PDFInfo
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- CN111005617A CN111005617A CN201911370537.6A CN201911370537A CN111005617A CN 111005617 A CN111005617 A CN 111005617A CN 201911370537 A CN201911370537 A CN 201911370537A CN 111005617 A CN111005617 A CN 111005617A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
- E04H12/348—Arrangements for demolition towers or the like
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Abstract
The application discloses a method for dismantling a V-shaped guyed tower, which comprises the steps of utilizing a new iron tower close to the V-shaped guyed tower to be dismantled as a suspension point of a hoisting tackle, installing and fixing temporary guys of the V-shaped guyed tower to be dismantled, adjusting the preset inclination angle of the V-shaped guyed tower to be dismantled to the new iron tower through the temporary guys, enabling the V-shaped guyed tower to be lower than the new iron tower to be dismantled, dismantling the V-shaped guyed tower to be dismantled in a grading manner, conveying the dismantled part to a target place through the hoisting tackle, directly turning the tower, and conveying large mechanical equipment to a dismantling site where the V-shaped guyed tower to be dismantled.
Description
Technical Field
The application relates to the technical field of power tower maintenance, in particular to a method for dismantling a V-shaped guyed tower.
Background
The V-shaped guyed tower, i.e. guyed V-shaped tower, is a tower which uses two V-shaped columns to support a conducting wire and an overhead ground wire and uses guyed wires to improve the stability, is usually used for 500kV lines and is used in a small amount in 220 kV.
In the traditional V-shaped guyed tower, the load of the V-shaped guyed tower is lower than the current design standard by a circuit designed according to the guide rules of 70 years, the safety margin is small, and the risk of the breakage accident of the cross arm of the V-shaped guyed tower exists, so that the V-shaped guyed tower which does not meet the design standard needs to be dismantled. The existing dismantling operation for dismantling the V-shaped guyed tower is to directly dismantle the guyed tower by using large machinery (such as a crane), and the V-shaped guyed tower is mostly distributed on special terrains with more obstacles, such as a fishpond, a flower and tree field, a house, a power line and the like, so that large mechanical equipment cannot enter the field for construction under the special terrains, a deviation rope is difficult to set, and the dismantling operation is seriously hindered.
Disclosure of Invention
The application provides a method for dismantling a V-shaped guyed tower, which is used for solving the technical problem that the existing V-shaped guyed tower dismantling operation is limited by terrain, so that construction is difficult.
In view of this, the present application provides a micro-grid networking method based on a multi-port electric energy router, including the following steps:
101. taking a new iron tower assembled in a preset range of a V-shaped guyed tower to be dismantled as a hoisting tackle suspension point, installing a hoisting tackle, and installing a plurality of temporary guys for fixing the V-shaped guyed tower;
102. transferring all the loads of the three-phase lead and the ground wires at two sides of the V-shaped guyed tower to be dismantled to the lead cross arm and the tower body main material of the new iron tower;
103. adjusting the temporary stay wire to enable the V-shaped stay wire tower to be dismantled to incline to the new iron tower by a preset angle;
104. connecting and fixing the hoisting tackle with a wire cross arm and a ground wire cross arm of the V-shaped guyed tower to be dismantled, and controlling the hoisting tackle to convey the wire cross arm and the ground wire cross arm to a target place after the wire cross arm and the ground wire cross arm are dismantled;
105. and connecting and fixing the tower body main material segment of the V-shaped guyed tower to be dismantled with the hoisting tackle, and controlling the hoisting tackle to send the tower body main material segment of the V-shaped guyed tower to be dismantled to a target site after the tower body main material segment is dismantled.
Preferably, step 101 further comprises:
100. and evaluating the topographic environment of the V-shaped guyed tower to be dismantled, and assembling a new iron tower within a preset range.
Preferably, the plurality of temporary pull wires comprises: 4 inner temporary reverse pull wires, 4 outer temporary reverse pull wires, 2 reinforcing temporary pull wires and 1 middle temporary pull wire;
the intermediate temporary stay wire is positioned between a first section of main material and a second section of main material of the V-shaped stay wire tower to be dismantled and is used for connecting the first section of main material and the second section of main material;
the reinforcing temporary stay wire is arranged on the V-shaped stay wire tower to be dismantled and inclines to the opposite direction of the new iron tower.
Preferably, step 102 specifically includes:
1021. removing a fixing bolt between a second wire cross arm and a third wire cross arm of the V-shaped guyed tower to be removed;
1022. dismantling the three-phase lead of the V-shaped stay tower to be dismantled and the suspension hardware string of the ground wires on two sides;
1023. transferring the three-phase lead, the ground wires at the two sides and the suspension fitting to be connected to the lead cross arm and the tower body main material of the new iron tower in series through the hoisting tackle;
1024. reinstalling a fixing bolt between the second section of wire cross arm and the third section of wire cross arm.
Preferably, the wire cross arm and the ground wire cross arm are dismantled for 4 times, and the ground wire cross arm is dismantled first and then the wire cross arm is dismantled;
the first two-time dismantling is carried out by dismantling a left ground wire cross arm and a right ground wire cross arm firstly, and the second two-time dismantling is carried out by dismantling a first cross arm whole body formed by a first section of lead cross arm and a second cross arm whole body formed by a third section of lead cross arm and a fourth section of lead cross arm.
Preferably, the main material of the V-shaped guyed tower to be dismantled is dismantled for four times;
the first main material whole composed of a first section of main material and a third section of main material and the second main material whole composed of a second section of main material and a fourth section of main material are dismounted in the first two times;
and then the third main material whole consisting of the fifth main material section and the seventh main material section and the fourth main material whole consisting of the sixth main material section and the eighth main material section are dismounted twice.
Preferably, the temporary pull line is a phi 13 steel wire rope.
Preferably, step 102 is preceded by:
identifying each part of the V-shaped guyed tower to be dismantled, wherein each part comprises: three-phase wire, wire cross arm, ground wire cross arm and body of the tower owner material.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a method for dismantling a V-shaped guyed tower, which comprises the following steps: 101. taking a new iron tower assembled in a preset range of the V-shaped guyed tower to be dismantled as a hoisting tackle suspension point, installing a hoisting tackle, and installing a plurality of temporary guys for fixing the V-shaped guyed tower; 102. transferring all loads of three-phase wires and ground wires at two sides of a V-shaped stay wire tower to be dismantled to wire cross arms and tower body main materials of a new iron tower; 103. adjusting a temporary stay wire to incline the V-shaped stay wire tower to be dismantled to a new iron tower by a preset angle; 104. connecting and fixing the hoisting tackle with a wire cross arm and a ground wire cross arm of a V-shaped guyed tower to be dismantled, and controlling the hoisting tackle to send the wire cross arm and the ground wire cross arm to a target place after the wire cross arm and the ground wire cross arm are dismantled; 105. and connecting and fixing the tower body main material segment of the V-shaped guyed tower to be dismantled with a hoisting tackle, and controlling the hoisting tackle to send the tower body main material segment of the V-shaped guyed tower to be dismantled to a target site after the tower body main material segment is dismantled.
The method for dismantling the V-shaped guyed tower comprises the steps of utilizing a new iron tower close to the V-shaped guyed tower to be dismantled as a suspension point of a hoisting tackle, installing and fixing temporary guys of the V-shaped guyed tower to be dismantled, adjusting the preset inclination angle of the V-shaped guyed tower to be dismantled to the new iron tower through the temporary guys, enabling the V-shaped guyed tower to be lower than the new iron tower to be dismantled, dismantling the V-shaped guyed tower to be dismantled in a grading mode, conveying dismantling parts to a target place through the hoisting tackle, avoiding the need of direct tower falling, avoiding the need of conveying large-scale mechanical equipment to enter a dismantling site of the V-shaped guyed tower to be dismantled, reducing the construction difficulty degree of the V-shaped guyed tower dismantling operation, and solving the technical problem that the existing V-shaped guyed tower dismantling operation is limited by terrain and causes.
Drawings
FIG. 1 is a schematic flow diagram of one embodiment of a method for demolishing a V-lay tower provided herein;
FIG. 2 is a schematic flow diagram of another embodiment of a method for demolishing a V-shaped guyed tower provided herein;
FIG. 3 is a schematic structural diagram of a V-shaped guyed tower to be dismantled in an embodiment of the application;
FIG. 4 is a schematic structural diagram of a temporary guy wire installed on a V-shaped guy tower to be dismantled in the embodiment of the application;
fig. 5 is a schematic structural diagram of a suspension fitting string to be dismantled from a V-shaped guyed tower to be dismantled in the embodiment of the present application;
wherein the reference numerals are:
1. a left ground wire cross arm; 2. a right ground wire cross arm; 3. a first section of wire cross arm; 4. a second section of wire cross arm; 5. a third section of wire cross-arm; 6. a fourth section of wire cross arm; 7. a left phase conductor; 8. a middle phase conductor; 9. a right phase conductor; 10. a first section of main material; 11. a second section of main material; 12. a third section of main material; 13. a fourth section of main material; 14. a fifth section of main material; 15. a sixth section of main material; 16. a seventh section of main material; 17. the eighth section of main material; 18. a ninth section of main material; 19. the tenth section of main material; 20. the eleventh section of main material; 21. the twelfth section of main material; 22. original bracing wires; 23. and (5) temporarily pulling a wire.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For easy understanding, please refer to fig. 1, an embodiment of a method for evaluating reliability of a power distribution network based on feeder capacity constraint provided by the present application includes the following steps:
It should be noted that, a cross arm breakage accident may occur in the operation of a traditional V-shaped guyed tower of a 500kV line, the load of the V-shaped guyed tower is mostly a line designed according to the guidelines of the 70 us, which is lower than the current design standard, and the safety margin is small, therefore, a new iron tower is usually assembled around the traditional V-shaped guyed tower to replace the traditional V-shaped guyed tower, and then the traditional V-shaped guyed tower is dismantled, the traditional dismantling of the V-shaped tower is mostly directly dismantled by using a large machine (such as a crane), the method requires an open operation site, no obstacles such as houses and power lines around, the requirements for the terrain are strict, and the costs for road repair and blue and green claims are high. The method for dismantling the V-shaped guyed tower in the embodiment of the application needs to depend on a new iron tower adjacent to the V-shaped guyed tower to be dismantled, and the hoisting tackle is installed by taking the new iron tower as a hanging point of the hoisting tackle. Meanwhile, the overall stability of the to-be-dismantled V-shaped guyed tower is stressed by the original four guyed wires, the structure of the to-be-dismantled V-shaped guyed tower is shown in fig. 3, the safety requirement of dismantling construction operation cannot be met, and the construction risk is high, so that a plurality of temporary guyed wires 23 for fixing the V-shaped guyed tower are additionally arranged on the basis of the original four guyed wires in the embodiment of the application, and the structure is shown in fig. 4.
And 102, transferring all the loads of the three-phase lead and the ground wires on two sides of the V-shaped stay tower to be dismantled to the lead cross arm and the tower body main material of the new iron tower.
In the embodiment of the present application, before the overall tower body of the V-shaped guyed tower to be dismantled is dismantled, loads of the three-phase wires and the ground wires on two sides of the V-shaped guyed tower to be dismantled need to be completely transferred to the wire cross arm and the tower body main material of the new iron tower.
And 103, adjusting the temporary stay wires 23 to incline the V-shaped stay wire tower to be dismantled to a new iron tower by a preset angle.
It should be noted that, in the embodiment of the present application, the temporary guy 23 is adjusted to apply a force to the V-shaped guy tower to be dismantled, so that the V-shaped guy tower to be dismantled is inclined to the new iron tower by a preset angle, and after the V-shaped guy tower to be dismantled is inclined, the height of the V-shaped guy tower to be dismantled is lower than that of the new iron tower, which facilitates the hoisting tackle to dismantle and transport the new iron tower.
And step 104, connecting and fixing the hoisting tackle with a wire cross arm and a ground wire cross arm of the V-shaped guyed tower to be dismantled, and controlling the hoisting tackle to convey the wire cross arm and the ground wire cross arm to a target place after the wire cross arm and the ground wire cross arm are dismantled.
It should be noted that, in the embodiment of the present application, the overall tower body dismantling operation of the V-shaped guyed tower to be dismantled is implemented by adopting a top-down dismantling manner, the ground wire cross arm and the ground wire cross arm at the tower top are firstly dismantled, the ground wire cross arm and the ground wire cross arm are firstly connected and fixed with the hoisting tackle in sequence, and after the ground wire cross arm and the ground wire cross arm are dismantled, the ground wire cross arm and the ground wire cross arm are respectively transmitted to a target location through the hoisting tackle.
And 105, connecting and fixing the tower body main material segment of the V-shaped guyed tower to be dismantled with a hoisting tackle, and controlling the hoisting tackle to send the tower body main material segment of the V-shaped guyed tower to be dismantled to a target site after the tower body main material segment is dismantled.
It should be noted that, after the top cross arm is removed, the tower body main material is sequentially removed in sections, and each section of main material is removed and transported to a target site through a hoisting tackle.
According to the method for dismantling the V-shaped guyed tower, the new iron tower close to the V-shaped guyed tower to be dismantled is used as a suspension point of the hoisting tackle, the temporary guyed 23 of the V-shaped guyed tower to be dismantled is fixedly installed, the preset angle of the V-shaped guyed tower to be dismantled to the new iron tower is adjusted through the temporary guyed 23, the V-shaped guyed tower to be dismantled is lower than the new iron tower, the V-shaped guyed tower to be dismantled is dismantled in a grading mode, the dismantling part is conveyed to a target place through the hoisting tackle, direct tower turning is not needed, large mechanical equipment does not need to be transported to enter a dismantling site of the V-shaped guyed tower to be dismantled, the construction difficulty degree of the V-shaped guyed tower dismantling operation is reduced, and the technical problem that the existing V-shaped guyed tower dismantling operation is limited by terrain and construction difficulty.
For ease of understanding, referring to fig. 2, another embodiment of a method of demolishing a V-lay tower is provided herein, comprising:
It should be noted that, in the embodiment of the present application, a field of the V-shaped guyed tower to be dismantled needs to be actually surveyed, and analysis and evaluation are performed in combination with the actual environmental condition of the line, so as to determine to assemble a new iron tower that meets the construction requirements of the dismantling operation.
It should be noted that, the plurality of temporary pull lines 23 in the embodiment of the present application include: 4 inside temporary reverse bracing wires, 4 outside temporary reverse bracing wires, 2 reinforcing temporary bracing wires 23 and 1 middle temporary bracing wire 23, as shown in fig. 4, the middle temporary bracing wire 23 is located between the first section main material 10 and the second section main material 11 of the V-shaped bracing tower to be dismantled, the first section main material 10 and the second section main material 11 are connected, and the reinforcing temporary bracing wire 23 is installed in the opposite direction (not marked in the figure) of the V-shaped bracing tower to be dismantled inclining to the new iron tower. Wherein, interim acting as go-between 23 selects for phi 13 wire rope, can increase fixed steadiness, reduces the safety risk.
Further, each part of treating demolising the V type guyed tower is marked, and each part includes: three-phase wire, wire cross arm, ground wire cross arm and body of the tower owner material.
Before step 203, each part of the V-shaped guyed tower to be dismantled may be identified in advance, and as shown in fig. 3, the V-shaped guyed tower to be dismantled includes: the ground wire comprises a left ground wire cross arm 1, a right ground wire cross arm 2, a first section of lead cross arm 3, a second section of lead cross arm 4, a third section of lead cross arm 5, a fourth section of lead cross arm 6, a left phase lead 7, a middle phase lead 8, a right phase lead 9, a first section of main material 10, a second section of main material 11, a third section of main material 12, a fourth section of main material 13, a fifth section of main material 14, a sixth section of main material 15, a seventh section of main material 16, an eighth section of main material 17, a ninth section of main material 18, a tenth section of main material 19, an eleventh section of main material 20, a twelfth section of main material 21, an original stay wire 22 and a temporary stay wire 23.
And step 203, detaching the fixing bolt between the second section of wire cross arm 4 and the third wire cross arm of the V-shaped stay wire tower to be detached.
And 204, removing the three-phase lead of the V-shaped stay wire tower to be removed and the suspension hardware string of the ground wires at two sides.
And step 205, transferring the three-phase lead, the ground wires at two sides and the suspension fittings to be stringed on the lead cross arm and the tower body main material of the new iron tower through the hoisting tackle.
It should be noted that, in the embodiment of the present application, before tilting the to-be-removed V-shaped guyed tower to a new iron tower, the suspension hardware string of the three-phase conductor and the ground wires on two sides needs to be removed, as shown in fig. 5.
And step 207, adjusting the temporary stay wires 23 to enable the V-shaped stay wire tower to be dismantled to incline to a new iron tower by a preset angle.
It should be noted that step 207 in the present embodiment is the same as step 103 in the previous embodiment, and is not described herein again.
And 208, connecting and fixing the hoisting tackle with the wire cross arm and the ground wire cross arm of the V-shaped stay tower to be dismantled, and controlling the hoisting tackle to convey the wire cross arm and the ground wire cross arm to a target place after the wire cross arm and the ground wire cross arm are dismantled.
And 209, connecting and fixing the tower body main material segment of the V-shaped guyed tower to be dismantled with a hoisting tackle, and controlling the hoisting tackle to send the tower body main material segment of the V-shaped guyed tower to be dismantled to a target site after the tower body main material segment is dismantled.
It should be noted that, in the embodiment of the present application, the wire cross arm and the ground wire cross arm are removed in 4 times, and the ground wire cross arm is removed first and then the wire cross arm is removed; firstly, dismounting a left ground wire cross arm 1 and a right ground wire cross arm 2 in the first two times of dismounting, and then dismounting a first cross arm whole consisting of a first section of lead cross arm 3 and a second section of lead cross arm 4 and a second cross arm whole consisting of a third section of lead cross arm 5 and a fourth section of lead cross arm 6 in the second two times of dismounting; dismantling the main material of the V-shaped guyed tower to be dismantled by four times; in the former two times of dismantling, firstly dismantling a first main material whole consisting of a first section of main material 10 and a third section of main material 12 and a second main material whole consisting of a second section of main material 11 and a fourth section of main material 13; and then the third main material whole body consisting of the fifth main material section 14 and the seventh main material section 16 and the fourth main material whole body consisting of the sixth main material section 15 and the eighth main material section 17 are dismounted for two times.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (8)
1. A method for dismantling a V-shaped guyed tower is characterized by comprising the following steps:
101. taking a new iron tower assembled in a preset range of a V-shaped guyed tower to be dismantled as a hoisting tackle suspension point, installing a hoisting tackle, and installing a plurality of temporary guys for fixing the V-shaped guyed tower;
102. transferring all the loads of the three-phase lead and the ground wires at two sides of the V-shaped guyed tower to be dismantled to the lead cross arm and the tower body main material of the new iron tower;
103. adjusting the temporary stay wire to enable the V-shaped stay wire tower to be dismantled to incline to the new iron tower by a preset angle;
104. connecting and fixing the hoisting tackle with a wire cross arm and a ground wire cross arm of the V-shaped guyed tower to be dismantled, and controlling the hoisting tackle to convey the wire cross arm and the ground wire cross arm to a target place after the wire cross arm and the ground wire cross arm are dismantled;
105. and connecting and fixing the tower body main material segment of the V-shaped guyed tower to be dismantled with the hoisting tackle, and controlling the hoisting tackle to send the tower body main material segment of the V-shaped guyed tower to be dismantled to a target site after the tower body main material segment is dismantled.
2. The method for demolishing a V-stay according to claim 1, further comprising, before step 101:
100. and evaluating the topographic environment of the V-shaped guyed tower to be dismantled, and assembling a new iron tower within a preset range.
3. The method of demolishing a V-lay tower of claim 1, wherein the plurality of temporary guy lines includes: 4 inner temporary reverse pull wires, 4 outer temporary reverse pull wires, 2 reinforcing temporary pull wires and 1 middle temporary pull wire;
the intermediate temporary stay wire is positioned between a first section of main material and a second section of main material of the V-shaped stay wire tower to be dismantled and is used for connecting the first section of main material and the second section of main material;
the reinforcing temporary stay wire is arranged on the V-shaped stay wire tower to be dismantled and inclines to the opposite direction of the new iron tower.
4. The method for dismantling the V-shaped guyed tower according to claim 3, wherein step 102 specifically comprises:
1021. removing a fixing bolt between a second wire cross arm and a third wire cross arm of the V-shaped guyed tower to be removed;
1022. dismantling the three-phase lead of the V-shaped stay tower to be dismantled and the suspension hardware string of the ground wires on two sides;
1023. transferring the three-phase lead, the ground wires at the two sides and the suspension fitting to be connected to the lead cross arm and the tower body main material of the new iron tower in series through the hoisting tackle;
1024. reinstalling a fixing bolt between the second section of wire cross arm and the third section of wire cross arm.
5. The method for dismantling the V-shaped guyed tower according to claim 1, wherein the wire cross arm and the ground wire cross arm are dismantled 4 times, and the ground wire cross arm is dismantled first and then the wire cross arm is dismantled;
the first two-time dismantling is carried out by dismantling a left ground wire cross arm and a right ground wire cross arm firstly, and the second two-time dismantling is carried out by dismantling a first cross arm whole body formed by a first section of lead cross arm and a second cross arm whole body formed by a third section of lead cross arm and a fourth section of lead cross arm.
6. The method for dismantling the V-shaped guyed tower according to claim 5, wherein the main material of the V-shaped guyed tower to be dismantled is dismantled in four times;
the first main material whole composed of a first section of main material and a third section of main material and the second main material whole composed of a second section of main material and a fourth section of main material are dismounted in the first two times;
and then the third main material whole consisting of the fifth main material section and the seventh main material section and the fourth main material whole consisting of the sixth main material section and the eighth main material section are dismounted twice.
7. The method of demolishing a V-lay tower of claim 1, wherein the temporary guy line is a phi 13 steel wire rope.
8. The method for demolishing a V-stay according to claim 1, further comprising, before step 102:
identifying each part of the V-shaped guyed tower to be dismantled, wherein each part comprises: three-phase wire, wire cross arm, ground wire cross arm and body of the tower owner material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370537.6A CN111005617A (en) | 2019-12-26 | 2019-12-26 | Method for dismantling V-shaped guyed tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370537.6A CN111005617A (en) | 2019-12-26 | 2019-12-26 | Method for dismantling V-shaped guyed tower |
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| CN111005617A true CN111005617A (en) | 2020-04-14 |
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| CN201911370537.6A Pending CN111005617A (en) | 2019-12-26 | 2019-12-26 | Method for dismantling V-shaped guyed tower |
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| EP3406896A1 (en) * | 2017-03-30 | 2018-11-28 | Sling Supply International, S.A. | System for assembling and disassembling wind turbines |
| CN110520582A (en) * | 2017-04-13 | 2019-11-29 | 贝斯特罗株式会社 | That has applied flexibly the tower-like building of basic courses department pushes over method |
| CN110094101A (en) * | 2018-01-31 | 2019-08-06 | 中国二十冶集团有限公司 | The method that tower crane removes standard knot under restricted clearance |
| JP2019210651A (en) * | 2018-06-01 | 2019-12-12 | 太平電業株式会社 | Demolition method for steel tower supported stack |
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Application publication date: 20200414 |