Construction Of High Formwork Supporting Frame With Couplers Techno-economic Analysis

With the rapid development of urban and rural economic development in china,there has been a lot of unique design, strange structure, and "high, big, new, sharp,especial, heavy" characterized by modern architecture. In the course of construction,concrete structure construction of high formwork supporting system in use iswidespread, and construction of high formwork supporting frame with couplers arehigh clearance, most widely used in the construction of long-span concrete structure,the most common type of formwork supporting methods. In recent years, the collapseof the scaffold and formwork support group and injuring group major securityincidents continue to occur, high-supported formwork for construction of difficultyincreasing technical and economic issues become more and more prominent.Fastener and bearing capacity of steel formwork with large, easy installation andremoval of flexible, economic costs are relatively low, relatively good technicalperformance characteristics make extensive use. At home, the high-formworktechnology relatively late economic research until2001, until the enactment ofsecurity technical specifications associated with them--the construction offastener-style steel pipe scaffolding safety technical specificationJGJ130-2001[1].After2001the newly promulgated regulation in china mainly include:the safety technical specification construction template JGJ162-2008[2];Theconstruction of fastener-style steel pipe scaffolding safety technical specificationJGJ130-2011[3]; The concrete structure project construction standardGB50666-2011[4].These specifications for calculation of high formwork supportingframe structure with clear rules. However, in canonical studies, after a different normthan are found in some conflicting mandatory provisions. For example: load value,combo, allowable slenderness ratio of bars, pole length.Combined with Zhengzhou Golden jade· North Golden Business Center projectin the construction of high formwork support with couplers, based on a differentdesign specifications, optimizing design and calculation of high-formwork construction programme, and make a comparative analysis, draw the mainconclusions are as follows:(1) Differences between the code for design of high formwork supporting frame islarge, if load values calculated, combination, pole length determination of majorinconsistencies, computed in accordance with the instructions JGJ162pole of stabilityto a large degree meet the requirements.(2) To regulate based on JGJ130, preparation of formwork construction plan issomewhat safe. Construction practice, according to specification GB50666andJGJ162in the practical design provides rational optimization of construction schemes,reducing construction costs, better economic results.