A method of hoisting and transporting round stone columns with inner steel pipes

Abstract

A method for hoisting and transporting a round stone column by using an inner steel pipe comprises the following steps: making a round stone column provided with a hoisting assembly according to prescribed structure dimensions and material requirements; hoisting the round stone column to a trailer by using positions having a distance of 0.207L to two ends of the round stone column as a hoisting point and a bearing point, and conveying the hoisted round stone column to field; hoisting the positions having a distance of 0.207L to two ends of the round stone column by using a crane A and a crane b, turning off the crane A after the round hoisting stone is hoisted to a certain height, continuously hoisting the round stone column to a vertical state by using the crane B, dismounting the wire rope of the crane A, hosting the round stone column to an assigned position through using the crane B, dismounting the wire rope and the steel hanging beam of the crane B after the round stone column falls to the ground, taking out a steel rod, and taking out the inner steel tube from the round stone column. The method has the following advantages: the maximal tension generated in the hoisting and transporting process of the round stone column due to the self gravity of the round stone column is 15.3-11.3% of that of traditional hoisting methods, so the hoisting and transporting safety is improved; and when the round stone column is hoisted to the vertical state, the round stone column is supported by a bottom steel plate through the inner steel tube, so tensile failure is avoided.

Description

technical field [0001] The invention relates to the transportation and installation of buildings, in particular to a method for hoisting and transporting round stone columns with inner steel pipes. Background technique [0002] Round stone columns are generally used in landscapes, road signs and other occasions, as special fixed buildings. [0003] In order to adapt to the transportation and on-site hoisting of the round stone column, the traditional method is to pre-embed the steel bars at both ends of the round stone column during the production of the round stone column, and the pre-embedded steel bars are welded into a whole with the steel plates placed at both ends of the round stone column, and welded on the steel plate Lugs. When transporting the round stone column, wire ropes are threaded on the lifting lugs at both ends of the round stone column, and the round stone column is hoisted horizontally on the trailer with a lifting device, and the two ends are padded and...

AI Technical Summary

Problems solved by technology

[0006] 2. When the round stone column is transported to the construction site, during the process of being hoisted from the horizontal state to the vertical state, one end of the round stone column is on the ground and the other end is hoisted. At this time, the round stone column is in an inclined state, and the bending tensile stress at the middle and lower edges of the round stone column caused by the gravity of the round stone column is sometimes would exceed the allowable tensile stress [σ] of the pebble stone material, thereby causing the pebble to snap or snap off in the process

[0007] 3. After the round stone column is hoisted to a vertical state and leaves the ground, the axial tensile stress caused by the gravity of the round stone column sometimes exceeds the allowable tensile stress [σ] of the stone material of the round stone column, which causes the round stone column to be broken during this process

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