A reasonable concession period design is an important
prerequisite for the success of public privatepartnership(PPP)
rail transit projects. To address the problem that a fixed concession period is
difficult to handle the uncertainty while effectively motivating social
capital, a flexible concession period model for PPP rail transit projects
considering a reasonable buffer is proposed based on critical chain project
management. First, the basic operating period of the project is clarified by
coupling the net present value method and demonstration project data. Second,
24 uncertain factors affecting the concession period are identified, and an
exploratory factor analysis is used to obtain six common factors and their
influence on the concession period weights. Third, according to the dynamic
characteristics of the influence of various factors on the concession period
varies with the operating stage, the
initial buffer model of the flexible concession period of PPP rail transit
projects is constructed using the shear and paste method and variable weight
ideology. Finally, the dynamic adjustment coefficient of buffer zone is
proposed according to the operational performance, and the buffer zone is
dynamically managed through the reward and punishment mechanism. The results,
verified by examples, show that the flexible concession period considering
reasonable buffer is more aligned with the practical needs of PPP rail transit
projects than the fixed concession period and can more effectively motivate
social capital to continuously improve operational performance.
YI Xin
,
QIU Kaijie
,
ZHANG Yuebin
,
SHEN Liangfeng
. Research on Flexible Concession Period of a Public
Private-Partnership Rail Transit Project
Considering Reasonable Buffer[J]. Tunnel Construction, 2021
, 41(12)
: 2066
-2072
.
DOI: 10.3973/j.issn.2096-4498.2021.12.006
