Research On The Technology Of The New Vertical Lift Embankment

With the acceleration of the process of urban development, coastal and riverside cities for urban flood control safety standards will be gradually improved. However,due to limitations of the urban land resources and urban landscape construction, traditional urban flood control project has been unable to meet the appropriate requirements. To this end, this paper presents a program about new vertical lift Flood(Tide) engineering structure, which avoids the excess occupation of the city of valuable land resources, while providing a broad vision for the urban landscape construction. The program structure is novel and there is no precedent of engineering applications at home and abroad. In order to ensure the implementation of the construction of the program structure, this paper established numerical model by means of large-scale finite element software(Ansys), by which to make numerical simulation analysis of the static and dynamic response of the structure. Specifically include the following:Firstly, we systematically summarize the domestic and international status of the construction of urban flood control project and compare the advantages and disadvantages between the existing new structures about urban flood control project. On this basis, this paper proposes a new structure and makes a comprehensive introduction of this new program.Secondly, through the method of static analysis, we statistics the stress and deformation under static deflection force of the proposed structure of the program, and the numerical simulation results indicate that the stiffness and stress of the structure under static force meet the design requirements of specification, and the structure has a high safety reserve factor. We can find that the maximum relative deflection of the structure is valued 1/1630, which is less than allowed value of 1/600 in specification. Meanwhile, the settlement of the foundation of the structure is weak and the adjacent unit can work coordination.Once again, through the method of modal analysis, the natural frequency of the whole structure was explored. Considering the change water level in front of steel gate, we respectively calculated dry and wet modal of the structure in modal analysis. The results show that the impact of additional water quality on the natural frequency of the structure is large, the first modal frequency ranges from 12.72 Hz to 18.91 Hz and the biggest drop natural frequency valued 37.5%. However, the natural frequency of the structure as a whole is still much higher than the frequency of the external excitation loads. Therefore, the structure has a high ability to withstand the risk of anti-resonance risk.Finally, we selected the way to calculate the wave load according to the regional characteristics of the region. The dynamic response of the structure by applying a wave loads was analysis under design conditions and checking conditions, the results of the calculation of stress and the maximum displacement in the steel gate was statistical compared. The results showed that: the vibration of the structural is weak in both conditions, and the strength of the structure is sufficient.