1. Single column basic follow-up and construction setting out.
Before the construction of the project, relevant professional and technical personnel shall be assigned to check with the accurate survey staff, which basically exceeds the following requirements:
① The basic surface should be leveled, and there should be no cracks, honeycomb and exposed tendons.
② Check the basic size and axis according to the construction drawings. The basic horizontal axis and vertical axis are specified to be vertical.
The basic dimension error is not more than ± 20 mm.
The error between the basic horizontal and longitudinal axis and the datum point shall not exceed 20 mm.
2. Before the installation of single column, the preparation work is in advance.
① Understand the engineering drawings, the relevant professional and technical personnel of the organization analyze the structure of the production workshop, and scientifically arrange the construction technology and construction schedule.
② Preparation of galvanized steel wire rope in advance
According to the plan and the net weight of prefabricated components given by the cost budget unit, galvanized steel wire rope buckle, snap ring and cable wind rope for hoisting shall be prepared in advance. The use of galvanized steel wire rope buckle for lifting can be estimated as follows:
T = (D / 10) 2T -- hoisting capacity of galvanized steel wire rope buckle, enterprise: t
D -- diameter of galvanized steel wire rope buckle, enterprise: mm
Note: the estimation method is applicable to new buckle, no broken wire and broken strand
3. Common problems of single column assembly and lifting on site.
1. Cranes and tankers need to occupy a single lane, and relevant procedures should be completed in advance with relevant departments.
2. Some grassland and some trees will be damaged by assembling and lifting on site, and relevant procedures shall be completed in advance with relevant departments.
3. When occupying the road, set up conspicuous signs on both sides of the occupied road surface and assign full-time personnel to take care of it.
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