Make efforts to "new" and achieve far-reaching with "quality".
China Railway Fourth Bureau focuses on innovation-driven and strengthens scientific and technological empowerment
Innovate and break through related core technologies
Accelerate the transformation of construction methods
Increase the application of intelligent construction in all aspects of engineering construction
Promote the industrialization, digitalization and intelligent upgrading of buildings
A new quality of productivity
A vivid practice to enhance the core competitiveness of enterprises
It provides a strong impetus for enterprises to achieve high-quality development
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The construction equipment of China Railway Fourth Bureau was upgraded
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Large diameter slurry balance shield
(Affiliation: Urban Rail Branch of China Railway Fourth Bureau)
The "Keihin Tongxin" is a shield machine customized by China Railway Fourth Bureau for the Tianjin Airport No. 1 Tunnel Project, with a total length of 135 meters, a total weight of about 2,800 tons, and an excavation diameter of 13.8 meters. During the construction of the project, the urban rail branch, together with the owner, technical experts of the bureau and scientific research institutes, collaborated to develop six intelligent innovative technologies, including "intelligent tunneling, intelligent assembly, intelligent scheduling, synchronous two-liquid grouting, intelligent mud treatment, and intelligent monitoring and analysis", so as to promote the transformation and application of technological innovation achievements into actual construction and production.
The use of this equipment predicts that the accuracy of the tunnel axis can be improved by 10%, the surface settlement by 25%, the box culvert assembly labor by 50%, and the assembly efficiency by 35%, laying a solid foundation for the high-quality construction of Tianjin Airport Tunnel.
The world's first large-section rectangular curve pipe jacking machine
(Affiliation: China Railway Fourth Bureau Shanghai Company)
"Tongcheng Pioneer" (China Railway No. 1286) is a pipe jacking machine tailored by China Railway Fourth Bureau for the construction of the underpass tunnel of the Wuzhen Avenue Trunk Road Rapid Transformation (Urban Section) Project in Tongxiang City, with a height of 7.22 meters, a width of 11.52 meters, a length of 5.805 meters, and a weight of about 450 tons. In order to meet the special working conditions of large-section and long-distance rectangular tunnel curve tunneling of the project, the "Tongcheng Pioneer" adopts a compact host design adapted to the curve, and is equipped with a curve jacking posture intelligent control system and a low-disturbance excavation system to ensure the safe and efficient tunneling of the equipment.
Compared with the traditional open-cut construction, the pipe jacking machine has the advantages of fast tunneling speed and low project cost, and at the same time, the impact on road traffic and stratum disturbance is small, which can effectively protect the surrounding environment. The smooth development and application of this equipment has filled the gap in the construction technology of large-section rectangular curve pipe jacking in the world, and is of great significance to promote the innovation and development of rectangular pipe jacking method.
Cantilever intelligent bridge building machine
(Affiliation: China Railway Fourth Bureau No. 1 Company, No. 4 Company)
The cantilever intelligent bridge building machine independently developed by China Railway Fourth Bureau is used in the construction of the 2nd standard bridge of the Wuyi section of the Shanghai-Chongqing-Rong high-speed railway and the 128-meter continuous beam construction of the 1st standard across the Beiqi River in front of the Fuhuai Railway Station. The equipment integrates load-bearing rods, hydraulic integral formwork, hydraulic adjustment, automatic travel, information monitoring, overall hoisting of steel skeleton, platform protection and other systems, and can be applied to the construction of linear or curved continuous beams of different spans such as 64 meters, 80 meters, and 100 meters.
The equipment solves the problems of complex structure, cumbersome assembly and disassembly, and large safety hazards in the construction of cantilever cast-in-situ continuous beams in the construction of traditional hanging baskets, greatly improves the construction level of automation, informatization and intelligence of cantilever cast-in-place beams, and improves the comprehensive work efficiency by more than 20%.
JQBS1100 type bridge erecting machine
(Affiliated unit: China Railway Fourth Bureau No. 8 Branch)
The JQBS1100-type bridge erecting machine is a construction equipment specially developed by China Railway Fourth Bureau for Chaoma Railway, which adopts a single girder and four legs structure, and is currently the largest tonnage of single girder bridge erection machine for high-speed railway box girder erection in China.
Compared with the traditional bridge erecting machine, the JQBS1100 type bridge erecting machine can quickly and conveniently realize the erection of double-line box girder with a span of 40 meters and below and the erection of single-line box girder with a span of 32 meters and below, and can meet the minimum curve radius of R800 meters and the maximum longitudinal slope box girder erection of 30‰, and the ergonomic efficiency of the lower frame beam with the same total construction amount can be increased by 1 time. The JQBS1100-type bridge erecting machine can transfer between bridges and realize the 2.8-meter erection beam at the tunnel mouth through the tunnel through the way of beam transport, which greatly simplifies the operation procedure and reduces the construction cost.
WPZ-500 ballastless track intelligent track-laying unit
(Affiliated unit: China Railway Fourth Bureau No. 8 Branch)
The WPZ-500 ballastless track intelligent track-laying unit independently developed by China Railway Fourth Bureau integrates tires, wheels and tracks and crawler belts, and is composed of four equipment, including long rail intelligent sorting vehicle, long rail intelligent push vehicle, long rail intelligent roller recycling vehicle and long rail intelligent tractor, making full use of cutting-edge high-tech such as intelligent robots, Internet of Things, big data, laser scanning precise positioning, and AGV automatic tracking. As the first set of ballastless track intelligent track-laying equipment at home and abroad, it can realize the precise traction and push of long rails, the precise layout of rollers and automatic recycling, stacking and reversing, and realize the intelligence of a series of processes and the automation of the whole process of track-laying construction operations.
The application of this invention has realized the transformation of high-speed railway track-laying construction from manually assisted mechanized construction to automated and intelligent construction, which can save 63% of manpower and increase the degree of mechanization to 90% compared with the original WZ500 ballastless track-laying unit.
Mobile formwork bridge making machine
(Affiliation: China Railway Fourth Bureau No. 1 Company)
The mobile formwork bridge-making machine used in the 11-bid-1 branch in front of the Xiongshang high-speed rail station of China Railway Fourth Bureau is the longest existing mobile formwork bridge-making machine in China. The equipment is mainly composed of outrigger system, main beam, internal and external formwork, hydraulic system, etc., using cushion cap or pier stud as support, on-site pouring of box girder, its main characteristics are good construction quality, easy operation, low cost.
Compared with the traditional mobile formwork and process, the equipment improves the assembly efficiency, improves the stability of the formwork, ensures the quality of the finished product, and solves the problems of unsmooth construction alignment and low end sealing efficiency, so as to ensure the safety of the equipment and the smooth progress of construction to the greatest extent.
Three-arm rock drilling rig
(Affiliation: China Railway Fourth Bureau and Fifth Company)
China Railway Fourth Bureau is equipped with a three-arm drilling rig for the 5th standard tunnel excavation of the Shenjiang Railway, with a length of 17.362 meters, a width of 2.962 meters, a height of 3.664 meters, a weight of about 43 tons, a maximum coverage area of 198 square meters, and a drilling diameter from 33 mm to 115 mm.
The compact host design suitable for curve construction is adopted, which can match and install a variety of high-power rock drills, which improves labor productivity. The smooth development and application of the equipment plays an important role in promoting the innovation of supporting construction methods for large machines.
Cantilever tunnel boring machine
(Affiliation: China Railway Fourth Bureau No. 1 Company)
China Railway Fourth Bureau is equipped with a cantilever tunnel boring machine for the Jixin Expressway 1 Biaoshanyuan Tunnel Project, with a length of 16.5 meters, a width of 3.8 meters, a height of 3.6 meters and a weight of 125 tons.
The equipment saves the consumption of personnel and machinery, accelerates the construction and production progress, reduces the disturbance to the surrounding rock, can effectively prevent the occurrence of accidents such as tunnel collapse, and is conducive to controlling the effect of over-under-excavation, and saves the consumption of concrete.
Cantilever TBMs
(Affiliation: China Railway Fourth Bureau Fourth Company)
China Railway Fourth Bureau has developed a cantilever roadheader during the construction of the new Dajinshan Tunnel of the Chaoma Intercity Railway. The operation of the equipment can reduce the disturbance of the surrounding rock, solve the impact of slag loading and slag transportation on the section, control the vibration of the surrounding rock caused by construction, strengthen the synchronous monitoring of the deformation of the existing tunnels under construction and the existing tunnels, and ensure the safety of the existing railway operation.
The equipment can realize the functions of peeling off the tunnel face, loading and transporting the machine itself, and spraying and dust removal at the same time, that is, it integrates cutting, loading, transportation and walking, and can be used for tunnels of any section shape.
Arch mounting trolley
(Affiliation: China Railway Fourth Bureau No. 2 Company)
The import arch installation trolley of Yunwushan Tunnel in front of Chongqing Section of Chengdu-Chongqing Middle Line of China Railway Fourth Bureau integrates a number of processes, mainly used for the installation of steel frames, mesh pieces and connecting ribs, auxiliary inspection and risk removal, under-excavation treatment, explosives installation and bolt installation.
The trolley adopts a three-arm three-gripper three-hanging basket structure, in which the three-arm adopts a sliding structure, with wireless remote control, to meet the prefabricated arch installation, various step method operations and arch precise positioning adjustment, fast installation speed, especially to improve the efficiency of heavy-duty arch, in the tunnel construction has shown excellent performance and advantages, and effectively reduced labor intensity, truly realized mechanized substitution, automation and reduction.
SPB DN2600 Slurry Balance Pipe Jacking Machine
(Affiliation: China Railway Fourth Bureau Municipal Corporation)
In the process of jacking, four SPB DN2600 slurry balance pipe jacking machines are used to strictly control the parameters of pipe jacking, effectively prevent risks, and adopt "three-dimensional geological radar" Detect the soil under the expressway to avoid soil collapse and road subsidence.
Source: Technical Management Department of China Railway Fourth Bureau, No. 1 Company, No. 2 Company, No. 4 Company, No. 5 Company, Municipal Corporation, Shanghai Company, No. 8 Branch, Urban Rail Branch