Research On Comprehensive Waterproof Technology About Substation Building Roof Which Bears Heavy Equipment

It saves a lot of space and it’s the reflection of energy saving, environmental protection, intelligent and compact green substation to place heavy electrical equipment on substation roof, and it helps to meet the "two types and one industrialization" requirements of the substation construction and also conforms to the requirements of national green industrial buildings. The functional areas of stacked layout has broad prospects, however, waterproof problem of roof has not been properly solved, which leads to the failure of large-scale promotion.According to the research and analysis of roof waterproof technology of Longma 220KV, Yunmeng 220KV and Dongming 220KV substation, it points out the main leakage reasons of substation roof, which bears heavy equipments. This thesis treats Hebei Wuqiang 220KV substation as the project background, analyze main leakage parts with main leakage reasons according to research, and stress on the research and study of anti-crack and antiseep performance, waterproof of roof building construction and waterproof of detail nodes.For improving the anti-crack and antiseep performance of roof concrete structure, the large general finite element software MIDAS is used to establish the calculation analysis model, respectively, the roof concrete structure finite element analysis of construction stage and service stage of Hebei Wuqiang substation are made to find out the weak parts of stress concentration and deformation of roof. On the basis of analysis results, enhance ultimate tensile capacity of reinforced concrete structure by increasing reinforcement and optimizing the arrangement of structural steel to improve the crack resistance during design stage. While during construction stage, reduce the shrinkage of concrete by adjusting the concrete mixture ratio and improving the construction method of concrete to improve antiseep and crack resistance of concrete.In order to improve overall water resistance of roof construction, hereby optimize the method of general roof construction and put forward new inversion type of composite water-proof roof. As well as the model test is made for checking the deformation resistance of composite waterproof layer. And the recycle test of "warming-water pouring-still" is made for six waterproofing specimens. Analysis by temperature deformation, waterproof layer (from down to up) adopts the combining form of "single component polyurethane coating waterproof layer+ polymer waterproof mortar layer+thermoplastic polyolefin waterproof roll layer" to achieve the optimal mutual deformation coordination. Meanwhile, deepening design about detail nodes is made for roof equipment foundation and embedded bolt etc. according to the principle of "node to enhance seal" in order to ensure reliability of waterproof of roof; Optimizing the construction method of the main waterproof layer, with particular emphasis on the mutual bonding treatment between polyurethane coating waterproof layer, polymer mortar screed-coat and thermoplastic polyolefin polymer coil waterproof layer, and on the importance of construction interval time.At last, conclude the research content and the main achievements of this thesis, and put forward the improvement suggestions of comprehensive waterproof technology from the two aspects of design and construction of roof concrete structure and integral water proofing in roof building, against the substation building roof which bears the heavy equipments.