On November 22, 2022, the Beijing Construction Engineering Information Network released the announcement of the bid winning candidates for the station front and four electric bid sections of the new Chengdu Chongqing Middle Line Railway in Sichuan. The project is divided into nine bid sections, and nine units, including China Railway 11th Bureau Group and China Railway Tunnel Bureau, won the bid. The estimated total investment of the project is about 25.847 billion yuan.

Project overview

Construction site: Chengdu, Ziyang, Sichuan

The Sichuan section of the newly built Chengdu Chongqing Middle Line starts from the Sichuan Chongqing provincial boundary (DK102+706) and ends at Chengdu Railway Terminal, Chengdu Station. The main line is 188.617km long. 140 bridges with a length of 118.591km and 27 tunnels with a length of 38.368km; The total length of bridges and tunnels is 156.959km, and the proportion of bridges and tunnels is 83.22%; Three new stations will be built on the main line, including Anyue Station, Lezhi Station and Jianzhou Station, and one existing station will be introduced to Chengdu Station; One Shiling South Station will be built in the ordinary speed relocation project of Chengdu Terminal, and the supporting rolling stock facilities will be built. The designed driving speed is 350 km/h, and a comprehensive test section will be built from the provincial boundary to Jianzhou.

technical standard

Railway grade: high-speed railway; Number of main lines: double line; Design speed: 350km/h; Distance between main lines: 5.0m; Maximum gradient: 20 ‰ for general sections and 30 ‰ for difficult sections; Minimum plane curve radius: 7000 m for general sections and 5500 m for difficult sections. Among them, the section from Dazu to Jianzhou New Town is 8500m in general section and 7500m in difficult section; The standard suitable for the driving speed shall be adopted for the section leading into the hub; Traction type: electric power; Locomotive type: EMU; Effective length of arrival departure track: 650m; Train operation control mode: CTCS-3 train control system; Dispatching command mode: centralized dispatching; Other technical standards shall be in accordance with Code for Design of High Speed Railway (TB10621-2014).

The Project is divided into 9 sections, as follows:

The first section of Chengdu Chongqing Middle Line Station: the project quantity is: 0.5 tunnels/4.854km, 10380m shield segment prefabrication, Anyue Plate Factory. Key and difficult projects: Shu'an Tunnel, 4.854km long, mileage/range: DK288+400 ballasted and ballastless boundary point ～ DK282+986 Shu'an Tunnel 250km/h and 350km/h section boundary point.

The first two sections of Chengdu Chongqing Middle Line Station: the quantities are: 0.718km subgrade, 3 bridges/14.757km, 391 box girder precast and erected, and 1.5 tunnels/6.345km. Key and difficult projects: Shu'an Tunnel, 5.526km long; Chengdu Super Major Bridge is 14.235km long, with 11 special spans and a maximum span of 128m. Mileage/range: DK282+986 Shu'an Tunnel 250km/h and 350km/h speed section boundary point ～ DK261+168 Tianziying No. 2 Bridge abutment at Chongqing end.

The first three sections of Chengdu Chongqing Middle Line Station: the quantities are: 0.413km subgrade, 2 bridges/0.295km, 3 tunnels/15.442km, and a simplified plate factory. Key and difficult projects: Longquanshan Tunnel, 8.027km long; Huangjiashi Tunnel, 4.682km long. Qianfeng Chong Tunnel, 2.733km long, mileage/range: abutment at Chongqing end of DK261+168 Tianziying No. 2 Bridge to abutment at Chengdu end of DK245+021 Chengdu Expressway Super Major Bridge.

The first four sections of Chengdu Chongqing Middle Line Station: the quantities are 2.556km of subgrade, 13 bridges/16.768km, 491 box girder precasting and erection holes, 2 tunnels/0.526km, 285.7 double track kilometers. Key and difficult projects: Super large bridge of simplified expressway, 3.046km long; Shipan Grand Bridge, 1.475km long; The super large bridge across Chengdu Second Ring Expressway, 2.992km long; The bridge crosses Boxiang Village, with a length of 3.671km; Jianzhou Station, mileage/range: abutment at Chengdu end of DK245+021 Chengdu Jianzhou Expressway Grand Bridge ～ DK225+169 Chengdu end of Tuojiang Grand Bridge, track laying mileage: DK288+400 ballast and ballastless dividing point of Sichuan section ～ DK102+706, and DK2+700 ～ DK102+706 of Chongqing section.

The first 5 sections of Chengdu Chongqing Middle Line Station: the quantities are 3.577km of subgrade, 20 bridges/20.943km, and 581 box girder precast and erected. Key and difficult projects: Tuojiang Grand Bridge, 1.254km long; Pingwu No. 2 Grand Bridge, 6.454km long; Super large bridge across the Third Ring Expressway, 2.406km long; Huanxi River Grand Bridge, 3.566km long (2 special spans, maximum span 56m), mileage/range: DK225+169 Tuojiang Bridge abutment at Chengdu end to DK200+647 Banzhuyuan Bridge abutment at Chongqing end.

The first 6 sections of Chengdu Chongqing Middle Line Station: the quantities are 3.679km of subgrade, 16 bridges/16.283km, 778 box girder precast and erected, and 5 tunnels/2.298km. Key and difficult projects: the super large bridge across Chongqing Chengdu Expressway, with a length of 1.831km; Extra large bridge of Yanbantan Reservoir, 1.972km long; It crosses the super large bridge of Suining Ziyang Expressway, with a length of 1.286km; Wutongcun Bridge, 1.886km long; The super major bridge across Wenfeng Avenue is 2.364km long, with mileage/range from DK200+647 Banzhuyuan Bridge abutment at Chongqing end to DK178+390 Mingjiagou Super Major Bridge abutment at Chengdu end.

The first 7 sections of Chengdu Chongqing Middle Line Station: the quantities are 6.415km subgrade, 30 bridges/19.736km and 6 tunnels/3.239km. Key and difficult projects: Zongshupo Tunnel, 1.054km long; Yaojiaba Grand Bridge, 4.395km long; The super large bridge across Chengdu Ziyang Chongqing Expressway, with a length of 1.634km; Lezhi Station, mileage/range: DK178+390 abutment at Chengdu end of Mingjiagou Super Major Bridge ～ DK148+996 abutment at Chengdu end of Longqiaogou Super Major Bridge.

The first 8 sections of Chengdu Chongqing Middle Line Station: the quantities are: 3.933km subgrade, 18 bridges/100004km, 611 prefabricated box girders and 6 tunnels/40003km. Key and difficult projects: Wenchang Village Tunnel, 2.021km long; The super large bridge across Anyue Avenue, 1.043km long; It crosses Suining Neijiang Expressway Grand Bridge, with a length of 1.393km; Anyue Station, mileage/range: abutment at Chengdu end of DK148+996 Longqiaogou Super Major Bridge to abutment at Chengdu end of DK131+059 Youfanggou Reservoir Super Major Bridge.

The first nine bid sections of Chengdu Chongqing Middle Line Station: the quantities are 6.024km of subgrade, 38 bridges/20.665km, 618 prefabricated box girders and 3 tunnels/1.661km. Key and difficult projects: Rongjiawan Tunnel, 1.302km long; Tianliuwan Grand Bridge, 1.65km long; Mawan Grand Bridge, 1.278km long; It crosses Zitong Expressway Grand Bridge, with a length of 0.788km. Mileage/range: abutment at Chengdu end of DK131+059 Youfanggou Reservoir Bridge ～ DK102+706 provincial boundary. Keywords: engineering construction information, engineering construction, engineering news

Bid winning information

The first bid of Chengdu Chongqing Central Line Station, the winning bidder is China Railway 11th Bureau Group Co., Ltd., the second bid of Chengdu Chongqing Central Line Station, China Railway Erju Group Co., Ltd., the third bid of Chengdu Chongqing Central Line Station, China Railway Tunnel Bureau Group Co., Ltd., the fourth bid of Chengdu Chongqing Central Line Station, China Railway Third Bureau Group Co., Ltd., and the fifth bid of Chengdu Chongqing Central Line Station, China Railway Bridge Bureau Group Co., Ltd, Sichuan Highway and Bridge Construction Group Co., Ltd. is the winner of the first six bid sections of Chengdu Chongqing Middle Line Station, China Railway 21st Bureau Group Co., Ltd. is the winner of the first seven bid sections of Chengdu Chongqing Middle Line Station, China Railway 19th Bureau Group Co., Ltd. is the winner of the first eight bid sections of Chengdu Chongqing Middle Line Station, and China Railway Fifth Bureau Group Co., Ltd. is the winner of the first nine bid sections of Chengdu Chongqing Middle Line Station.

The bid winner of Supervision Bid 1 is China Railway Academy (Beijing) Engineering Consulting Co., Ltd., the bid winner of Supervision Bid 2 is Sichuan Tieke Construction Supervision Co., Ltd., the bid winner of Supervision Bid 3 is Chengdu Southwest Railway Supervision Co., Ltd., the bid winner of Supervision Bid 4 is China Railway Eryuan (Chengdu) Consulting Supervision Co., Ltd., and the bid winner of Supervision Bid 5 is Beijing Tieyan Construction Supervision Co., Ltd. Congratulations to the bid winner! Editor/Zhao E