Anti-float Analysis Of The Stilling Basin Of Sluice Built On The Deep And Thick Sands

Solve the energy dissipation facilities, anti-floating stability of the real problem is to solve its problems by the uplift pressure. Deep sand base with a strong permeability, the construction of the base in the deep sand on the hydraulic structures (such as gate,dam) retaining, the pressure head of groundwater flow velocity increased to promote and increase the effect on the bottom of the uplift pressure of concrete buildings.The gate is a low-head structures, the plunge pool depth 1.0m to 3.0m in general between the plunge pool and the lock chamber so often used 1:4 ~ 1:5 Slope to connect. Strong base in the construction of the locks of sand for drainage relief, people often set in the downstream drainage relief facilities to improve the impermeability of gate stability.According to the criterion of sluice design(SL265-2001),including method of lines and The theory of improved resistance method calculating both horizontal and vertical, Ex-clude lean-to construction and the drainage holes.Few cases of medium-sized gate base on the deep and thick sands which is located in Guangzhou,the facilities are energy dissipation process in the discharge unstable failure. Therefore, it is necessary to energy dissipation and gate facilities Slope of the force to conduct further analysis.The Slope base on the deep and thick sands of the force, some scholars through the finite element method, energy dissipation and drainage facilities Slope of the force carried out analysis and calculation, and achieved good results. But the finite element method requires more specialized knowledge, but also more complex, general engineering and technical personnel is not easy to master. It's necessary to study a relatively simple method to facilitate the practical application of engineering.To this end, the author access to relevant information by using the theory of improved resistance method drag coefficient of energy dissipation and gate facilities and drainage facilities Slope under the force was calculated and analyzed. First, select the data consistent with the engineering test and more close to the calculated conditions, and compared with the measured data to verify the accuracy can be calculated. And then choose the same finite element calculations to calculate the working conditions, and with the results of FEM are compared. Calculation shows that the method used for the analysis of this energy dissipation facilities and drainage facilities Slope circumstances force is feasible for the project thus provides a simple method.