The tunnel wet spraying trolley is an intelligent equipment used for concrete spraying support in modern tunnel engineering, integrating a walking chassis, a pumping system, a mechanical arm and an accelerator system. Let's take a brief look at the tunnel wet spraying trolley.

  I.Core modules

   1. Walking chassis system: adopts a four-wheel drive rigid chassis with a climbing ability of 20°, which can adapt to complex terrain;

   2. Mechanical arm system: equipped with 3-5 hydraulic arms, covering a 15-meter spraying radius, and supporting 360° no-dead-angle operation;

   3. Intelligent proportioning system: through a hose pump, the accelerator and concrete are accurately and synchronously mixed, with an error rate of <2%.

   2. Performance advantages and construction innovation

  II.Compared with the traditional dry spraying process, the wet spraying trolley has achieved four major breakthroughs:

   1. Efficiency leap: The spraying volume of a single trolley reaches 30-40m³/h, which is 5 times higher than the manual efficiency, and a 100-meter tunnel support can be completed in a single day;

   2. Quality assurance: The wet spraying process reduces the rebound rate to below 15%, increases the concrete density by 30%, and the compressive strength reaches the C25 standard;

   3. Safety and environmental protection: Remote control operation keeps personnel away from the face, reduces dust concentration by 80%, and reduces the risk of occupational diseases by 70%;

   4. Cost optimization: Automated proportioning reduces material waste by 20% and reduces the overall construction cost by 35%.

  III. Application scenarios and technological evolution

   1. This equipment has been widely used in:

   ① Transportation infrastructure: high-speed rail tunnels (such as the Northwest Railway Project), urban subway support;

   ② Mining engineering: metal mine tunnel repair, coal mine underground reinforcement;

   ③ Special working conditions: large-section tunnels (span>15m), water-rich strata and other complex geology.

   2. Technology iteration presents three major trends:

   ① Intelligence: Equipped with IoT sensors, real-time monitoring of spraying thickness and support quality;

   ② Modularity: The quick-detachable structure shortens the transition time to 2 hours;

   ③ Green: The proportion of electric models has increased to 45%, and energy consumption has been reduced by 60% compared with diesel power.

   According to industry forecasts, the global wet spraying trolley market size will expand at a compound annual growth rate of 12.3% from 2025 to 2030, and China's market share will exceed 35%. Domestic leading companies such as Xintong Machinery have achieved a full industrial chain layout, with products exported to more than 30 countries and a market share of more than 40% in Southeast Asia.