Research On Capacity Improvement Of Three-Gorge Dam Shiplock

The improvement of a shiplock capacity is a realistic and unsolved problem.This dissertation tries to develop models and methodologies with unprecedentedconcepts, logic and methods to solve the capacity of Three-Gorge Dam shiplock.The concepts different from previous include the definition of shiplock capacitywhich, in this work, is varied value, rather than a fixed number, depending onconditions different from the designed value, which is less directive to solvingproblem of shiplock.The new logic of approaching capacity is that the equilibrium of capacity demandon capacity from vessels and supply with capacity by shiplock should be the focus,that is, the interrelationship between the pass of vessels and service of shiplockshould be the focus, rather than only one side, of the research. This is where themethods of this work are derived from, different from either dynamic programmingor simulation worked only on one side of the relationship.The unprecedented methodologies applied in this work are queuing theory usedfor the stochastic process of shiplock service so that the relationship of demand andsupply can be established; identifying and decomposition of controlling variables ofshiplock capacity, in order to optimize the capacity; two-dimension discrete orderingmethod, min-path method and linear programming are applied to optimizingdecomposed controlling variables based on each variable properties.In this work, TBC model is built for shiplock capacity and, due to lack ofsampling data, selected factors: vessel allocation within shiplock chamber,combination of chambers in operation and duration of passing shiplock which are thecontrolling the capacity are defined as variables in TBC model. Three optimalobjectives are set forth as: the maximum cargo passing shiplock, the maximumnumber of vessels passed and the minimum passing duration time. Some sub-models,like VASC (VSCAMC, VSCAMV VSCAMT), DPS are established for variableoptimization, then the optimal solut(?)re computed for the optimal control ofshiplock operation, as reference to shiplock authority.##原图像不清晰 This work approach shiplock capacity problem from perspectives of economics,transportation engineering, operations research and facility design procedure to studythe improvement of shiplock capacity.The content sequence of this dissertation is: research background (cited somewider and more in automation for better understanding of this work), models building,models decomposition, estimation, optimization of models, computation of theoptimums and suggestions to shiplock operation.