| 一, SummarizationWith the development of society and the improvement of people' s living standard, people engage in social activities and productions, demand to construct many large span structures such as auditoria, exhibition hall, gym, air shed. Space structures are most competitive and suitable structural shape to solve the problem of erecting wide span building structure. Among all the structural shapes of space structure, space grid structures is a kind of form which has been applied most extensive and develop most rapidly at home and abroad since century. Compared with traditional plane structure, space grid structures possess many unique superiorities, it is a structure that combine mechanical rationality and manufacturing economy, architecture beauty and structural beauty, it provide probability and extensity to erect structures with rational form and spanning more space. Space grid structures consist of latticed frame and reticulated shell, latticed frame and reticulated shell have many structural form, those forms will be developed and innovated continuously. Both latticed frame and reticulated shell are space grid structures, but their mechanical property has many difference, the integral stressing performance have analogy with slab in a sense, it mainly bear bending force; then reticulated shell is mainly stress membrane fore, the integral mechanical property is similar to continuous shell. So in course of construction and installation, the attributions of latticed frame and reticulated shell cannot be considered completely identical. By reason of latticed frame (shell) has lots of forms, the concert stress performance is depend on its individual form.As a kind of complex higher-order hyperstatic structure, space grid structures was ever considered as a most safe structure when it is applied widely, once a stick of member quit working, other member would help it to endure external force. Whereas many accidents have also occurred in engineering practice, the influence of construction factor is less quantitatively analyzed when the reasons of the accident are finding. In fact, stuff quality of space grid structures member, manufacturing accuracy and construction management are major factor that influence development with high quality and high-level of space grid structures, space grid structures commonly with large span, and more is public buildings, important buildings, mass man under it, dearness equipments on it, erecting at high level, hardest strengthen when happen problems. In order to guarantee construction quality of space grid structures, scientific management must be strengthen.二, Construction project organizationLatticed frame (shell) installation enterprise should set up project site organization institution adapted to project construction activities firstly before constructing and installing in the site, through discussing the designed principle and basis of construction project organization, the step of construction item organization of space grid structures are related as follows: project analysis, object working, agency and function determination, personnel and duty definition. The staple two forms of space grid structures construction item site organization are discussed: straight line system and line function system. Construction item manager play a major role on setting up organization of project team, he is the center of construction item administering, and comprehensive implementor of project object, must in charge of outcome object of construction unit, as well as with responsibility for enterprise efficiency object, construction item manager s consequence also establish his special duty, power, benefit, construction item manager should use rights reasonably, perform his own duty strictly, set up high performance organization , manage project scientifically, finish item object successfully.三, Site technical management and construction methodsConstruction project technical management is an important item of production factor management. Written... |
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