As the company’s first specialized team for shield tunneling construction, the center has mastered the operation technology of shield tunneling machines in the shortest possible time and completed the excavation task of subway tunnels as scheduled, laying a solid foundation for the company’s strategic transformation and enriching the connotation of the “underground iron army” of the 14th Bureau of Water and Electricity.
The center completed the shield tunneling task 24 days ahead of schedule and achieved the best results with a monthly footage of 236 rings (354 meters), a weekly footage of 76 rings (114 meters), and a daily footage of 17 rings (25.5 meters).
The left line of the shield tunnel section is 1053 meters long, and the tunnel is assembled using universal segment staggered joints.
The left line between Gulou Station and Southeast Corner Station started in July 2010 and was completed in December 2010; The right line started in August 2010 and was fully connected in March 2011.
Location: Luohu District, Shenzhen City, Guangdong Province.
The total length of the crossing section is 2446.7m, of which the shield excavation section is 2160.6m long, and the vertical shafts on the south and north banks are 26.9m and 18.3m deep, respectively, totaling 2205.8m.
Shenzhen Metro Project Name: Sungang Honghu Shield Tunnel Excavation Project for Shenzhen Metro Line 7 Section 7306 of China Hydroelectric 14th Bureau.
Starting date: March 30, 2014.
The tunnel belongs to an underwater circular cross-section single tube shield tunnel, with a crossing grade of large-scale river crossing engineering.
The connecting line section is 240.9m.
Two earth pressure balanced shield tunneling machines with a diameter of 6.34 meters are used for construction.
The construction of this project fills the gap in the company’s technology for shield tunneling in natural gas pipeline networks and shield tunneling across rivers.
Construction Introduction: This project is one of the major control projects of the first phase pipeline project of the natural gas pipeline network in Guangdong Province.
It is located in the central urban area of Tianjin, and the surrounding buildings are densely packed, making the construction difficult.
Construction introduction: Chengdu Rail Transit Line 18 starts from South Railway Station, passes through the High tech Zone and Tianfu New Area, passes through Longquan Mountain, and reaches Chengdu Tianfu International Airport.
Construction Introduction: Tianjin Metro Line 2 is the east-west backbone line of Tianjin’s rapid rail transit network and an important component of Tianjin’s rail transit.
Shield Tunneling ยท Engineering Equipment Operation Center | Specialized Road Tianjin Metro Project Name: Tianjin Metro Line 2 Contract Section 8 Construction Project Location: The intersection of Nanma Road and Chengxiang East Road in Nankai District, Tianjin Construction Date: April 6, 2009 Completion Date: March 1, 2011 Construction Scope and Content: The 8th Contract Section of Tianjin Metro Line 2 is the first subway project of China Electric Power Construction Group to adopt shield tunneling construction, The construction of the shield tunnel is undertaken by the center, from Southwest Corner Station to Gulou Station to Southeast Corner Station (one station with two sections), with a total length of 2300 meters for the four tunnels on the double track.
The center completed a shield tunneling section with a length of 2160.6 meters, which was the longest shield tunnel with a diameter of less than 4 meters in China at that time, setting records for daily progress of 21 rings (25.2 meters) and monthly progress of 310 rings (372.0 meters).
This construction requires crossing through a high water level soft aquifer, with dense underground pipelines and multiple waterproof interfaces.
Guangdong Natural Gas Pipeline Network Project Name: Guangdong Natural Gas Pipeline Network Phase I Pipeline Project Location: Shapu Town and Yong’an Town, Dinghu District, Zhaoqing City, Guangdong Province Construction Date: December 31, 2010 Completion Date: December 26, 2011 Construction Scope and Content: The Xijiang Shield Tunnel is the first project constructed by the company using mud water air cushion pressure balance shield tunneling method.
Chengdu Metro Line 18 Project Name: Chengdu Metro Line 18 Civil Engineering Section 3 Haifu Shield Tunnel Section (Haifu Section 1 Air Shaft to Haichang Road Station Section) Construction Location: Chengdu Tianfu Avenue Construction Date: April 21, 2017 Completion Date: October 20, 2018 Construction Scope and Content: Undertake the construction of Chengdu Metro Line 18 Civil Engineering Section 3 Haifu 1 # Air Shaft to Haichang Road Station Shield Tunnel Section, with the shield starting from the 1 # intermediate air shaft, Ending at Haichang Road Station, the single track section tunnel has a total length of 2700.5 meters and is equipped with four connecting passages, making it the longest section tunnel excavated for the entire single track tunnel.
Received the honorary title of “Haihe Cup” from Tianjin Metro Company in 2010.
There are numerous buildings on the ground and scattered underground pipelines; A total of 27 tracks, highway arch bridge pile foundation underpinning, Honghu Wetland Park, Buji River, and entrance and exit tunnels cross the high-speed railway station along the line; The geological changes are significant, with full section hard rock, strongly weathered rock, and gravelly cohesive soil layers alternating along the route.
Two China Railway equipment 8630 composite earth pressure balance shield tunneling machines were used for left and right excavation, with a total length of 5400.38 meters.
Construction Scope and Content: Hoisting and Coordination of Double Line Shield Tunnels, Assembly of Shield Tunnels, Coordination and Debugging of Shield Tunnels, Installation of Starting Brackets and Reaction Frames, Track Laying Installation and dismantling management of gantry cranes, installation and operation of shield machine circulating water cooling system, shield tunneling and maintenance, pipe segment assembly, synchronous grouting and secondary grouting, slag transportation, mortar mixing, atmospheric pressure tool replacement, extension and dismantling of various pipeline facilities, operation and maintenance of various equipment, dismantling of shield machines, cooperation with lifting and transfer work, installation and operation, maintenance and dismantling of water supply and drainage pipelines, The operation, maintenance, and management of all complete equipment related to the shield tunneling process cycle, including related links and auxiliary work content.
Completion date: December 23, 2014.
It is a composite functional line integrating market express line and airport special line, serves as the main artery between the central urban area and Tianfu International Airport, and is the first city express line to enter the central urban area with a speed of 140 kilometers per hour in China.
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Construction introduction: The left line tunnel between Sungang Station and Honghu Station of Shenzhen Metro Line 7 has the highest risk level in Metro Line 7, and belongs to the interval project of Level I risk source.
