Research On Progress Management Of HN Port Wharf And Revetment Project Based On Critical Chain Method

Based on the waterway transportation can greatly reduce the transportation cost,strengthening the water transportation engineering construction can greatly improve the convenience and economy of transportation.The Gantt chart method or network diagram method is mostly used for project schedule management in waterway engineering.The logical relationship and spatial layout of each working procedure are often considered when the construction period plan is formulated,but the rationality of the resource allocation used in each process of the project is not fully considered.In order to speed up the construction progress,the method of increasing personnel and equipment is often adopted,which often leads to the increase of project performance risk.The critical chain technology not only considers the sequence and mutual influence of each construction task,but also considers the constraints between the construction tasks,which has the advantages of reducing the construction cost and ensuring the construction period objectives.In this thesis,HN wharf and revetment project as the research object,in the case of delayed start time and extremely tight project duration,the key chain technology is used for optimization.This paper reviews and studies the literature on critical chain management at home and abroad,and summarizes the research results and development trends of critical chain technology at home and abroad.Use the field investigation method to understand the construction progress,analyze the existing problems and the causes of the problems.Using the case analysis method,the HN wharf and revetment project are analyzed as a case.By using critical chain technology to optimize project schedule management,the application scope of critical chain technology is enriched.The comparative study method is used to compare and analyze the implementation effect before and after optimization,and the advantages of critical chain technology in the schedule management of water transportation project are analyzedBy using the three time method to re estimate the duration of each process,eliminate the excessive safety time set artificially,draw the network diagram to determine the critical path,balance the constraints between each process to determine the critical chain.On the basis of PERT based three-point estimation method,the buffer size is determined by considering the relative position of each process and the duration characteristics of each process.The relative buffer monitoring method is used to monitor the buffer consumption,and the early warning and control scheme is specified.Finally,by comparing the actual construction period with the original schedule,the results show that the critical chain technology can reduce the actual construction period of HN wharf and revetment project by 49 days,which fully proves the applicability and advantages of critical chain technology in HN wharf and revetment project.It provides a reference for the calculation and setting of buffer size in gravity structure water transportation engineering.