Key projects show their prowess! Zoomlion's wet shotcrete machines have contributed to the construction of the Yuanda Expressway in Yunnan Province

Recently, at the construction site of the Yuanda Expressway project in Yunnan Province, the "Pioneer No.1" series ZG30 and ZG35 wet shotcrete machines of Zoomlion have provided a strong guarantee for the smooth progress of the project with their efficient pumping performance, continuous operation capacity, low rebound rate and high flatness.

It is learned that the Yuan-Da Expressway is one of the important projects in Yunnan Province's "14th Five-Year Plan" for comprehensive transportation development. The project is approximately 78 kilometers long, starting from Yuanmou County in Chuxiong Prefecture and ending in Dayao County. It passes through multiple mountainous areas and areas where ethnic minorities live in compact communities, with complex geological conditions and high construction difficulty.

During the construction of the Yuanda Expressway tunnel, problems such as broken surrounding rock and water seepage are often encountered, which put forward extremely high requirements for the pumping performance of the equipment. The "Pioneer No.1" wet sprayer is equipped with the industry's highest outlet pressure and has a strong pumping capacity. Its S valve and pipeline flow channel have been optimized in design, featuring low pumping resistance and the ability to adapt to various poor material conditions, ensuring the continuity and stability of concrete transportation.

During tunnel construction, the continuous operation capacity directly affects the project progress. Among them, the "Pioneer No.1" ZG30 wet shotcrete machine is equipped with a 1500L dual accelerator bucket, eliminating the need for frequent addition of accelerators. This significantly extends the continuous operation time, reduces the waiting time for downtime, and greatly improves the construction efficiency.

The key components of the "Pioneer No.1" wet sprayer adopt mature parts from Zoomlion's "Lingyun" pump truck and have undergone rigorous test verification, ensuring the stability and reliability of the equipment. The boom has undergone a fatigue test of 150,000 cubic meters, providing a solid guarantee for the smooth progress of the construction. In addition, the concrete pipes for the boom are mainly steel pipes with fewer flexible pipes. During the pumping process, the boom vibrates less and the spraying quality is high, ensuring the uniformity and compactness of the tunnel lining.

Rebound rate is one of the important indicators for measuring construction quality. The maximum dosage rate of the accelerator addition system of the "Xianfeng No.1" wet shotcrete machine can reach 15%. The system supports automatic and manual adjustment of the accelerator addition amount, which can control the comprehensive rebound rate of concrete within 10%. Not only has the construction quality been improved, but also material waste has been significantly reduced and construction costs have been saved.

Its nozzles are proportionally controlled, and the spraying speed can be flexibly adjusted according to the construction requirements. The operator can easily adjust the Angle and position of the nozzle through the remote control to ensure the flatness of the spray surface. The remote control is designed in line with the operator's operating habits, supporting one-click adjustment of the accelerator ratio. It is simple and easy to operate.

Meanwhile, the equipment is equipped with a high-flow multi-way valve group, and the boom moves flexibly without delay, making operation convenient. In addition, Zoomlion has equipped the equipment with a mobile APP, which supports real-time viewing of the equipment's operating status, running trajectory and historical working conditions, facilitating managers to keep track of the equipment's operation at any time and achieving intelligent management.

After the completion of the Yuan-Da Expressway, it will effectively improve the transportation conditions along the line, promote regional economic development and resource exploitation, and contribute to the implementation of the rural revitalization strategy. In the future, Zoomlion will continue to be driven by innovation, providing customers with more efficient and reliable construction equipment, and helping infrastructure construction in various regions reach new heights.