Investigations On The Schedule Management Of The Expressway Project Under Limited Construction Period

The construction environment of Guangzhou regional expressway project is complex and affected by many factors,which often leads to the lag of the schedule.Therefore,in order to complete the construction task,the project manager needs to compress the project duration at a certain stage.At present,scholars at home and abroad have studied the project compression period,but the existing technology fails to combine the construction characteristics of Guangzhou regional expressway project and analyze from the starting point of the compression period of expressway project.Therefore,the managers may make inaccurate judgments in the practical application.In view of the above problems,this paper puts forward a kind of schedule management measures for Guangzhou regional expressway project under the condition of compressed schedule on the basis of the existing research on schedule management and compressed schedule.Aimed at the uncertainty of process period,this paper analyzes the characteristics of Guangzhou regional expressway project construction,summarizes the main factors that will affect the process period,and introduces the factorial random probability method to simulate the process period.In addition,in view of the fact that the traditional factor-based stochastic probability method has no obvious aggravating effect on the construction period under the condition of multiple influencing factors,and ignores the objective fact that the theoretical lower limit of the construction period exists,an optimization method is put forward to ensure that the simulation of the construction period can better reflect the situation of the project construction period.In order to make the measures of compression period can be applied to the expressway project,the method of compression period in the traditional expressway project is analyzed in detail,and on this basis,the lap network model is introduced according to the characteristics of the expressway project process,and the purpose of compression period is achieved by expanding the lap relationship between processes.The problem of greatly increasing construction cost due to the compression period is avoided as far as possible,and the random probability method is combined with lap network.Secondly,the network plan is simplified based on the idea of "unified planning method",so that the project manager can reduce the workload of the relevant analysis of the compression period.The two parameters of process critical probability(ACP)and line critical probability(CPP)are used to help judge the process that needs to be compressed and the key points of subsequent schedule management.In view of the large amount of instability and unpredictability in the construction period of Guangzhou regional expressway project,the buffer zone is set at the end of the project schedule by combining the critical chain management technology to describe various emergencies in the construction process.In view of the complexity of conventional buffer setting method,a simple buffer setting method based on Bayesian statistics theory is proposed,which makes the buffer can be dynamically adjusted according to the field implementation.For highway project managers during the compression time limit the need for schedule control strictly,put forward a set of dynamic schedule management method,can adjust the project plan,with the progress of the project of dynamic and combining field construction to the plan of implementation of project managers in the form of the buffer warning,ensure timely adjust the project schedule,target guarantee period.Finally,this paper takes an expressway(Guangzhou section)as an example and uses Python language,Excel and other auxiliary means to verify the feasibility and advancement of the proposed schedule management measures under the state of compressed construction period.