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A method for dismantling large tower booms by using small tower cranes

A tower crane and large-scale technology, applied in the direction of transportation, packaging, cranes, etc., can solve the problems that tower cranes of different specifications are difficult to dismantle smoothly, and there is no research on the dismantling of large tower cranes by small tower cranes, etc., to achieve increased demolition methods, low construction difficulty, and safety sex high effect

Active Publication Date: 2021-11-05
CHINA NAT CHEM ENG THIRD CONSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two main demolition modes at present, one is the self-dropping demolition of a single tower crane, and the other is to dismantle a small tower crane through a large tower crane. It is difficult to realize the smooth dismantling of two tower cranes with different specifications

Method used

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  • A method for dismantling large tower booms by using small tower cranes
  • A method for dismantling large tower booms by using small tower cranes
  • A method for dismantling large tower booms by using small tower cranes

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Embodiment

[0028] A method for dismantling the jib of a large tower with a small tower crane, wherein the small tower crane is tower crane A in the figure, with a height of 176.25m (47 knots), and the length of the jib is 47.5m; the large tower crane is tower crane B in the figure, with a height of 190.4m (32 knots). The specific steps are

[0029] Step 1. Extend the jib of tower crane A to 55m (the original boom length is 47.5m), and increase the jib of tower crane A to 55m, and after calculation, it is necessary to simultaneously add a 3t counterweight and a 10m section Standard arm 3. Add two 4915mm length tie rods. The specific operation is as follows:

[0030] ① if figure 1 As shown, check the braking system of the hoisting mechanism of tower crane B and the normal operation of each mechanism. After confirming that the construction requirements are met, the balance weight of tower crane A is removed by tower crane B (a 4t counterweight is reserved), and the balance weight of tow...

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Abstract

The invention discloses a method for dismantling a large tower crane by using a small tower crane. The steps include: increasing the length of the boom arm, and making the small tower crane higher than the large tower crane by increasing the height of the small tower crane or reducing the height of the large tower crane; Use a small tower crane to disassemble the balance weight of the large tower crane, and reserve a piece of balance weight; remove the hook and luffing rope of the large tower crane; Shorten the tie rod and lower it to the ground; use a small tower crane to remove the last counterweight of the large tower crane; use a small tower crane to remove the rear arm section of the large tower crane's balance arm and the balance arm tie rod; use a small tower crane to remove the forearm section of the large tower crane's balance arm. The method achieves the purpose of using a small tower crane to dismantle a large tower crane, increases the way of tower crane dismantling, is conducive to the smooth dismantling of tower cranes of different sizes under special working conditions, and has low construction difficulty, easy manipulation and high safety.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a method for removing a large tower boom by using a small tower crane. Background technique [0002] Tower crane, also known as "tower crane", is the most commonly used lifting equipment on construction sites. It is used to lift steel bars, Raw materials for construction such as wood flute, concrete, steel pipe, etc. The tower crane mainly includes structures such as cap, tower body, balance arm, lifting arm, tie rod, luffing trolley, slewing tower body and cab. [0003] After the tower crane is finished, it needs to be dismantled. There are two main demolition modes at present, one is the self-dropping demolition of a single tower crane, and the other is to dismantle a small tower crane through a large tower crane. It is very difficult to realize the smooth dismantling of two tower cranes with different specifications. Contents of the invention [0004] The o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/28B66C23/62
CPCB66C23/28B66C23/62B66C2700/03
Inventor 罗会田罗胜张云金
Owner CHINA NAT CHEM ENG THIRD CONSTR
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