多事件干扰下工期拖延责任分摊计算

Calculation on construction delay responsibility sharing with multi-event interference

针对利用网络分析技术计算工期索赔时常发生的叠加和发散效应,分析了网络计算叠加效应和发散效应的成因,得出了网络计算叠加效应和发散效应分别产生于初始时差和过程时差重复利用的结论.提出了多事件干扰下工期拖延责任分摊原则和计算方法.该方法认为时差应为承包商和业主双方共同所有,直接针对双方因时差优先使用权产生的争议,即网络计算叠加效应和发散效应产生的附加值.当在时差的使用上不发生争议时,任何一方都可以随意使用时差.如果发生争议,则争议时差应在业主和承包商之间平均分摊.该方法坚持了公平原则,很大程度上化解了承包商和业主之间的争议,同时对共同延误也具有适用性.

Compared to the independent analysis of contractor-risk and owner-risk delay events,integrated analysis for all delay events using CPM（critical path method） scheduling techniques will have different results which are called the phenomenon of superposition effect and divergent effect.Root causes of this phenomenon are discussed in detail in this paper.Superposition and divergent effect are closely related to the reuse of total float and newly created total float time for both the contractor and the owner.Under current scheduling practices,total float is considered to be an asset for both the contractor and the owner to use for free.Newly created total float is produced by project delays caused by the contractor or the owner.Based on the consideration of the ownership and utilization of total float and newly created total float,the principle for the allocation of the outcome of superposition and divergent effect has been proposed.The new concept makes a direct response to the focus of disputes for superposition and divergent effect.Calculation methods for the allocation of delay responsibility are proposed.