The Feasibility Study Of Seawall Of Qiantang River Reinforcement Heightening Project

Seawall is an artificial barrier to resist against floods and storm surge. In the background of global warming and frequent extreme Iather disasters, how to increase the security of seawall and to enhance the construction of resisting floods(tides), should be the key spoint of water conservancy projects. The extension construction of Changqian River Section Seawall(Qiantang River) has realistic meaning to the life and property safety of people in Haiyan County, Zhejiang Province and to social and economic sustainable developmen. To carry out feasibility study can provide basis for project investment decision and preliminary design, which also plays an important role in ensuring the scientificity and rationality of engineering construction.By using the field investigation, the method of combining theoretical analysis and engineering calculation, and according to the basic requirement of the construction project feasibility study, the article studies the feasibility of the extension construction of Changqian River Section Seawall(Qiantang River) from the perspectives of the engineering general layout and main buildings, the construction organization design, the scheme design of soil and water conservation and the environmental impact of the project, etc. Main conclusions are as follows:1.Combined with the safety appraisal conclusion and advice of Changqian River Section Seawall(Qiantang River), the artical analyzes the existing potential safety hazard, discusses the necessity of the constuction of Changqian River Section Seawall(Qiantang River), and definites the task and scale of engineering construction.2. According to the industry standard and related specifications, I determined the extension construction of Changqian River Section Seawall(Qiantang River), its building grade and the flood control(tide) and seismic fortification standards. On the basis of the overall layout, and through the calculation of tide, wave element, wave run-up and overtopping rate, I confirmed the elevation of wave wall as 9.80 meters. Based on cross section structure scheme comparison and analysis of six kinds of seawall, RecommendationⅠis for the extension construction of River Side Section Pattern Seawall, Recommendation Ⅱis for cross-sea bridge Convergence Section Pattern Seawall. I designed the watergate, sewage pipe and cross-sea bridge cross structures and put forward the watergate USES the box culvert, sewage pipe section by using the heightening slope type to the reinforcement of the heightening of empty containers.3.From the perspectives of traffic condition, water and electricity supply, main building materials and construction site, I analyzed the reinforcement construction conditions of the construction of the extension seawall project, determined the construction procedures and methods of the main section, arranged the construction traffic, overlay the layout and the overall layout of water supply system construction, and formulated the construction schedule of seawall reinforcement extension project for 12 month.4.On the basis of the analysis of the existing status of soil and water loss, I predicted the soil erosion issues caused by the construction site layout and abandon slag heap on the original landform disturbance. I thought the soil erosion caused by seawall reinforcement heightening engineering construction mainly concentrated in the construction period, and after the project put into operation it will not produce water loss and soil erosion. For soil and water loss problem during construction period, I put forward a recommendation plan which combined with engineering layout and construction layout, and direct effect on the soil and water conservation of the prevention and control of the main works and temporary works.5. I analysed and forecasted the seawall engineering implementation and construction impact on the environment, putting forward environmental protection measures from the aspects of control of noise, dust andsolid waste. As long as effective environmental protection measures in the engineering construction are carried out, we can control the environmental impact of engineering construction. Therefore, I think reinforcement extension construction of Changqian River Section Seawall is feasible.