Hey, this question is big if you say it is big, and it is small if you say it is small. I really haven't counted it. After searching on Baidu, I didn't find several satisfactory answers.

　　The annual gathering of classmates is very lively, and listening to classmates talk about the mountains has naturally become a blessing to me.

　　My university classmates all graduated from the Railway Institute. After graduation, most of them were assigned to central enterprises such as China Railway, China Construction, and China Communications, mainly responsible for highway and railway construction. When everyone got together, the most talked about was the development and construction of China's highways and railways. Everyone was like a few treasures, and I was fascinated by them.

　　China's transportation construction in recent years can be described as rapid progress and global attention. For some difficult-to-break ends of the road network and extremely difficult road sections, we have enough ability to straighten the road so that we can make roads in the mountains and build bridges when encountering water. Apart from sighing, I am really proud of the continued strength of the motherland. At this moment, I really want to sing "I love you, China".

　　China’s builders have created so many world firsts, the people are proud, and the world is amazing. Thinking of this, I curiously raised a lot of questions about railway construction. For example, how are highway and railway piers built? How is the beam between the two piers cast? How are the railways and highway bridges over the big rivers constructed? How is the tunnel constructed?

　　All the students are really talented, and experts are experts. Everyone gave me the most professional answers in the most professional language. My feeling is: enjoyment, enjoyment and admiration!

　　Let's talk about railway and highway piers first. The railway is dominated by hyperbola, with hollow piers, solid piers and slope piers.

　　The structures of municipal piers and columns are relatively complex, with many curved surfaces and heterogeneous structures. According to the design styles of various cities, there is almost no universality.

　　The design of special-shaped pier column formwork needs to better consider the rationality of construction and structure. In other words, the concrete pouring of various piers is built by relying on the pier template.

　　The construction of large rivers, highways and railway bridges is inseparable from the lanyards. Hanging basket is the main equipment in cantilever construction. According to the structure, it can be divided into truss type (including flat-chord unbalanced weight type, rhombus, triangle, bowstring type, etc.), diagonal type (including triangular diagonal type and prestressed diagonal type) Type), steel type and mixed type 4 types. According to the requirements of concrete cantilever construction technology and design drawings for the hanging basket, comprehensively compare the characteristics, weight, steel type and construction technology of various forms to determine the structure of the hanging basket; the hanging basket construction does not occupy the road at all, and there is no need to interrupt the main The auxiliary road traffic relies on the movement of the "hanging basket" to make the concrete box girder poured on site be produced in the "hanging basket". The construction personnel pour 2-4 meters long each time. After the bridge body is hardened and reaches sufficient strength, the hydraulic device will Push the hanging basket forward, and then pour a new section of beam.

　　The design principles of the hanging basket: light weight, simple structure, strong and stable, easy to move forward, easy to assemble and disassemble, strong reusability, small deformation after stress, and sufficient space under the hanging basket, which can provide larger construction operations The surface is conducive to the construction operation of steel formwork.

  　　Therefore, the construction of large rivers and large-span projects is completed with the help of the lanyard formwork. The construction of the tunnel is inseparable from the concrete lining trolley, which is an indispensable non-standard product for the secondary lining of the tunnel construction process. It mainly includes simple lining trolleys, fully hydraulic automatic lining trolleys and grid-frame lining trolleys. Fully hydraulic lining trolley can be divided into side-top arch type, downward arch type, vertical wall type, full circular needle beam type and so on.

　　Whether it is bridge formwork, lanyard formwork, or concrete lining trolley equipment for tunnels, it is inseparable from a strong manufacturing company to support it. There is such a well-known enterprise in China, and many state-owned enterprises have established long-term strategic cooperative relations with it, and China’s first "Jacob high-speed rail" has also participated in it. This enterprise is also involved in the construction of countries along the "Belt and Road". Participating figures, various bridge templates, static load test benches, and railway concrete beam embedded parts (CRCC has passed the certification review). Do you think this company is good or bad? I said the bull was running.

　　After talking about which company for a long time, the editor will tell you that it is Dongfeng Shijing Template Group Company, its predecessor is Beijing Dongfeng Shijing Template Group Company.