In the field of modern tunnel and underground engineering construction, wet spraying trolleys are favored for their excellent operating flexibility, wide range of applications and significant improvement in work efficiency. However, to ensure the best quality of shotcrete, it is necessary to start from the professional ability of operators, the selection of mechanical equipment and the quality of raw materials. This article will explore these key factors in depth.
I. Cultivate a high-quality operation team
Responsibility awareness and skill level: The operator's sense of responsibility and technical proficiency directly affect the quality of shotcrete. Ideal staff should not only have a solid theoretical foundation, but also have rich practical experience.
II. Optimize high-performance wet spraying trolleys
The stable performance wet spraying manipulator can not only ensure high-quality spraying effects, but also greatly improve the efficiency of spray anchor work. Therefore, when purchasing, be sure to pay attention to the technical maturity and stability record of the product.
III. Strictly select high-quality raw materials
1. Standards for cement and aggregates: Use cement of no less than 42.5 grade, ensure that the particle size of coarse aggregate (such as crushed stone or pebbles) does not exceed 15mm, and the fineness modulus of fine aggregate (medium and coarse sand) exceeds 2.5, which are the basis for achieving high-quality concrete.
2. Scientific use of accelerator: Compatibility test of accelerator and cement, as well as solidification test of cement paste should be carried out, and the proportion of accelerator addition should be reasonably controlled at 3%-5% to achieve the best hardening speed and strength performance.
Improving the quality of wet spraying trolley sprayed concrete is not achieved by the efforts of a single link, but requires comprehensive measures from the quality of operators, equipment selection to raw material standards. Through the refined management of the above three dimensions, not only can the final quality of sprayed concrete be significantly improved, but also the overall construction efficiency and safety can be effectively improved, thereby promoting the smooth progress of the entire project.