中间站到发线接轨对高速铁路通过能力影响研究OA

With the increasing connectivity and coverage of China's high-speed railway network,branch lines and connecting lines are continuously being connected to existing line sections or stations of high-speed railway.For the scenario of arrival and departure track connection at an intermediate station,the intermediate station with two platforms and four tracks,which has the most stringent transportation organization condition,was taken as an example to analyze the influence of connection modes that occupied the arrival and departure tracks and did not occupy the arrival and departure tracks on the train tracking interval and section passing capacity of the existing lines.Firstly,through the analysis and merging of similar operating conditions,the main operating conditions affecting the section's passing capacity were summarized,namely the"stop-stop","stop-pass","pass-stop",and"pass-pass"tracking conditions between new line trains.Based on the calculation principle of the train tracking interval,a calculation method for the tracking interval time of the above four operating conditions under two types of rail connection modes was proposed.On this basis,a calculation formula for the section passing capacity under the scenario of arrival and departure track connection at intermediate stations was further proposed.Finally,a case study was conducted taking the connection of a new high-speed railway connecting line to the existing high-speed railway intermediate station A as an example.The results showed that for the connection scheme of occupying the arrival and departure tracks,the tracking interval time for"stop-stop","stop-pass","pass-stop",and"pass-pass"scenarios between new line trains were 6.8,7.8,4.0 and 5.0 minutes,respectively.For the non-occupying arrival and departure track connection scheme,the speed limit section within the station was shortened,and the tracking interval time for"pass-stop"and"pass-pass"scenarios were reduced compared to the occupying arrival and departure track connection scheme.From the perspective of transportation organization,it was recommended to minimize the tracking operation of trains occupying the same arrival and departure tracks in the mainline sections as much as possible to reduce the impact on the passing capacity of mainline sections.