The beginning of a new year.
Vientiane update. Highway construction boom in Guizhou is repeated.
The builders of the 17th Bureau of China Railway set off with struggle.
Across the mountains, wading through dangerous beaches and canyons.
Set a new record for the "Highway Museum" with ingenuity and hard work.
Continue to write a glorious chapter of "pioneer" in the new era.
The "bridge" sees Guizhou, and the moat becomes a thoroughfare
Picture丨Yashiqingte Bridge.
In the hinterland of northern Qianbei, the cold air exudes a strong New Year's flavor. Gou Xing, director of the laboratory of the 5th bid project of Jinrentong Expressway, put on a safety helmet as usual, put on the inspection kit on his back, and went to the first stop of the daily safety inspection - Yashiqing Bridge.
Yashiqing Bridge is the first cantilever poured concrete arch bridge built by China Railway, with a net span of 200 meters and a 160-meter-deep U-shaped valley. Erecting a 'flying rainbow' in the deep mountains and huge valleys, every step will face major challenges of traditional construction. Gou Xing told reporters in a precious way.
Picture丨Make New Year's dishes for the left-behind personnel.
Due to factors such as large spans of bridges and strong winds in canyon areas, the project for the first time integrated the hanging basket running system, buckle anchor system, and cable hoisting system to form the "cable-stayed cable cantilever pouring process", which was applied to the large-span cantilever pouring construction. The whole process adopts the adaptive construction monitoring method, and realizes the high-precision control of the component deviation through the first-class test and the calculation of correction parameters.
In the past year, the project team has completed all key engineering tasks in the bridge closure and bidding section with high quality. In order to ensure the efficient progress of the remaining projects after the holiday, Gou Xing, who has been sticking to various highway projects in Guizhou for 8 years, asked Ying to stay at the construction site again this year. While doing a good job of safety inspection at the site on time every day, he also took the initiative to serve as the chef of the New Year's dinner, making hometown food for the left-behind personnel, so that the construction site has a different New Year's flavor.
Over the mountains and tunnels, creating a Chinese miracle
Figure丨The entrance of the Yangping Tunnel.
The construction site of the Yangping Tunnel of Jinrentong Expressway with the longest mileage and the most difficult tunnel under construction in Guizhou was very lively during the Chinese New Year. The machinery in the tunnel roared, the crowd was crowded, the tunnel vault, road construction and other operations were carried out in an intense and orderly manner, and hundreds of builders greeted the arrival of the Spring Festival in the Year of the Dragon.
The Yangping Tunnel is located in a typical mountainous area of karst landform, with a total length of 72 kilometers, the maximum buried depth is about 525 meters, through karst caves, karst cavities, carbonaceous mudstone and other undesirable geological zones, mud inrush, gas overflow and other risks are intensive, and the daily water inflow of the double caves reaches up to 1580,000 cubic meters.
Figure丨Interchange construction site.
In order to solve the problem of tunnel drainage, the project adopts measures such as pre-embedding drainage blind pipes in advance and adding double-layer drainage pipes in the construction of the second lining to create good conditions for tunnel excavation. Through the construction of the domestic advanced tunnel comprehensive advanced geological prediction system, the advanced detection and real-time early warning of the surrounding rock in front of the tunnel have been realized, and the construction record of the highest monthly excavation of 203 meters in an extremely complex geological environment has been created.
In order to ensure the safety of construction, Wang Qingtang, the chief engineer of the project, led the team to apply the "one gun and three inspections" system to strengthen the monitoring of gas and toxic and harmful gases, and equipped the tunnel with a diameter of 1 with low air leakage rate and small friction coefficient5-meter ventilation hose and low-noise energy-saving variable special ventilator are set up to provide all-round safety protection for construction. Since the construction of the project, it has maintained safety "zero accidents" for more than 900 consecutive days and nights. "We are confident and capable of completing the task and winning the 'good start' of the Year of the Dragon! Wang Qingtang said confidently.
Stick to the "Qianlu" and welcome the New Year with hard work
Figure丨Tho Luo Ping bridge frame girder construction.
During the Spring Festival, the rainy weather in Guizhou increased, and more than 70 builders wearing reflective clothing and helmets were busy between the Suoloping Bridge and the Suoloping Tunnel, and the construction processes such as pouring the second lining concrete, calibrating the axis deviation and elevation were in an orderly manner.
As a major and difficult control project of the whole line, the Suoloping Bridge is located in a steep terrain and complex geology, the main bridge spans a V-shaped deep valley, and the main pier pier is 140 meters high, which is equivalent to the height of a 50-story building, which is difficult to construct and has high safety risks.
Picture丨Aerial photography of the Soloping Bridge.
Now the task of erecting the right beam of the bridge is carried out, and the total length of the bridge is 7856 meters, the bridge span structure is a suspended rigid structure and a 40 meter T-beam structure. In order to successfully complete the beam erection operation, we adopted the beam transport vehicle and the double-track guide beam type bridge erecting machine for construction. Su Zigao, the technical person in charge, while staring at the scene, introduced to reporters, "The more festivals and holidays, the more we must tighten the safety strings to ensure the safety and quality of the project, and there is no room for negligence!" ”
With the traffic of people and the roar of machinery, the roads and bridges are meandering and extending in the beautiful mountains and rivers of Guizhou. The new generation of builders of the 17th Bureau continued to write the story of "Qianjin" of their predecessors in the struggle, which opened the prelude to the New Year.
China Railway 17th Bureau).