Suspended-rising support system of tower crane

Abstract

The invention relates to a suspended-rising support system of a tower crane, belonging to the field of building machinery. The suspended-rising support system comprises three sets of support structures which have same structure and are arranged up and down. When the suspended-rising support system works, the adjacent two sets of support structures support a tower body; each support structure comprises a support frame, a main girder, two symmetrical inclined struts as well as a first strut, a second strut, a third strut and a fourth strut, wherein the two symmetrical inclined struts are arranged at the lower part of the main girder and support the main girder; the first strut, the second strut, the third strut and the fourth strut support the main girder in the horizontal direction; the main girder, the two inclined struts and one ends of the four horizontal struts are respectively connected with the wall body; the upper part of the main girder is connected with the support frame; an expression of a pivot position of the main girder and the inclined struts is as follow: c(f-c)=a(f-a)+2a(f-c), wherein a is a distance from the action point of the frame at the outer side of a pivot O to the pivot O, c is the midline length of the frame along the main frame direction, and f is the calculation length of the main girder. The suspended-rising support system disclosed by the invention reduces the rigidity of the cantilever end, improves the action force of two main branches of the tower body near one side of a building to the main girder, enables the gravity of the tower body acted to the main girder to move inwards and reduces the horizontal load of the support structures to the building.

Description

technical field [0001] The invention belongs to the field of construction machinery, in particular to a suspension-climbing support system for a tower crane. technical background [0002] Tower cranes used in high-rise and super high-rise buildings usually have two types of external attachment and internal climbing, but for some buildings with special structures and locations, these two types of tower cranes are not suitable, that is, internal climbing lacks The support point, and the construction site inside the building needs to adopt the suspension climbing method, which is to support the tower crane on the wall on one side of the wall and climb up along the wall. This climbing method can also replace the external attachment use scheme. The use of externally attached tower cranes in the construction of high-rise and super high-rise buildings has the following disadvantages: 1. The tower body structure is too high, and the lower structure is under too much force, which re...

AI Technical Summary

Problems solved by technology

The use of externally attached tower cranes in the construction of high-rise and super high-rise buildings has the following disadvantages: 1. The tower body structure is too high, and the lower structure is under too much force, which requires special reinforcement, which increases the cost of the structure. In addition, the structure itself is too high Large, the number of standard sections used is large, the cost of the whole machine is high, and the operating cost is also high; 2. There are many attachment points and many attachment frames are used, which is also a factor that increases the cost of use

But in fact there are the following defects: 1, the support structure in the middle of the three supports is in a state of no force in theory, and it is a redundant structure, which increases the cost of the structure and the support process; 2, this kind of support layered up and down The support method determines that the supporting structure should be supported at an equal distance, but in reality, few buildings can meet the conditions for equidistant support.

In addition, this method determines that the support distance between the upper and lower support frames is limited. Large and extra-large tower cranes will cause the support system to generate excessive horizontal force on the wall, which will significantly increase the wall reinforcement. 3. The lower diagonal bracing is supported at the end of the main support structure, resulting in unreasonable stress state of the main support structure, which increases the cost of the main support structure; 4. The connection method between the inner side of the frame and the wall is not Reasonable, if the main support structure is pre-embedded, each main support structure will be cut and damaged, and the cost is too high; 5. The support method of the frame structure determines the poor leveling performance of the frame, which will cause adjustment support Cost of framing process

In a word, the support cost of the above-mentioned support structure is too high and the practicability is poor

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