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Yantan plant design


Plug the two sets of rings,[link widoczny dla zalogowanych], with ring and near the edge of the spiral steel butterfly to be increased, totaling an increase of steel 220t, also required for the filling to set the level of pond water and circulating pumps and various monitoring instruments, will take increased investment in more than 200 million, due to suppression processes are more affected l ~ 2 months period. The cushion has proven experience in the domestic construction, cushion material costs only 10 yuan, the construction method is simple. Through comprehensive comparisons, the use of bedding options, polystyrene foam cushion material,[link widoczny dla zalogowanych], the design requirements of the deformation modulus of manufacturers can be obtained through the ratio test. Structure calculated using the structural mechanics method, plane finite element method and finite element method and other three methods. After a demonstration, the use of the upper load + weight + temperature load cases were calculated and reinforcement, without regard to the role of internal water pressure. Results of the three calculation methods to structural mechanics is the most reinforced section of the law, plane Jingzhi finite element method, finite element method the least. Surrounding the spiral case of the engineering section of reinforced concrete using three methods, on average, close to the plane finite element method for calculating the value of the axial reinforcement value from finite element method is given. 5. Crane Beam Factory features two 2 × 300t overhead crane, the biggest thing for the generator wheel lifting, weight l000t. I6 each side two crane wheels, the wheel arrangement of the length of 20,19 rn, the maximum wheel pressure P ... = 946kN. Crane beam of this project has been invested for the current operation of hydropower stations in the largest tonnage of the crane beam. Upstream and downstream segment of each unit, each with five crane columns, arranged four cross-beam, clear span 6.62rn. The bottom of the crane beam tube from the roof up 37.25rn, the use of a cast concrete beam, the template support difficult, long duration, so choose a single span simply supported prestressed beam, single-span simply supported beam and = Recessed Continuous Composite Beam Cross-comparison of three programs. Simply supported single span prestressed girder crane beam height of 3m,[link widoczny dla zalogowanych], the web thickness of 0.5m, the upper and lower flange width 1.0m, weight of each beam 3B. Work t, quantities most provinces, but the use of two common Lift 20t winch can not turn 90. In place, so abandon. Recessed single-span simply supported beam with high beam is also 3rN, beam width of 1m, 80cm precast lifting the bottom of the upper 220cm by situ, can also remove the overhead support,[link widoczny dla zalogowanych], prefabricated part of the weight 15.7t, 20t winch used a lifting platform place. Two-span continuous beams with selected 34-inch ruler and construction methods with the same single-span, as the second full round of cross-pressure, negative moment in the supports of a larger,[link widoczny dla zalogowanych], single-span, compared with an increase of steel consumption and cost. Determined through a comprehensive comparison with single span simply supported Composite Beam program. (E) Conclusion 1. Yantan selected through a multi-program comparison right bank of dam toe power house programs, the use r dam closed electrical part of building space, deputy plant layout, the main transformer and GIS switching station and shorten the transition and from the generator to the main changes to the GIS from the main switching station distance, is conducive to the safe operation of power plants and to facilitate construction. 2. Yantan had considered the preliminary design stage arranged in the upper reaches of GIS switching station top deputy plant. Since switching station on the roof need to 5t crane hoisting roof electrical equipment, force structure complex. After a demonstration, go to the GIS switching station on the dam slope between, you can speed up the switching station construction schedule and reduce the pressure pipe and equipment vibration of vibration on the sF equipment. 3. Downstream water retaining structure is not rigid link with the main house structure, easy pouring concrete retaining Results Abstract increased independence, speed up the construction schedule 4. In the case of bedrock well, the tail section of pipe diffusion can be saved using separate floor volume of concrete and excavation works, the design is relatively simple. 5. According to the characteristics of spiral Yantan and specific conditions of the external concrete volute cushion program using the program more beneficial than suppressing, * small data mantis Yantan stressed pier design features water Yantan Overflow Spillway gate in the gate, training and retaining a large area of 15 × 22.49m, a barrel pier under the unilateral thrust of supporting the door to drink 23160kN. Interpretation of prestressed concrete pier supporting structure, the design has the following characteristics: 1. Upstream of the primary anchor cable anchor side door arranged in the arc of the pier on the one hand to shorten the length of anchor beam: on the other hand can avoid early water power generation and prestressed construction of contradictions. 2. The first use of the domestic high-strength low relaxation wire @ Tmm. 3. Only the layout of the anchor block on the horizontal anchor beam times, no help anchor the vertical layout of Cambodia. With two layers of steel mesh to overcome the secondary tensile stress and simplify construction. 4. DVF-Z the first to use special anchor pier PC. 5. Prestress loss was measured by force sensors embedded 4000kNCX drum. (Guangxi Power Industrial Survey and Design Institute Zhou Jianxin feed)