In modern construction and civil engineering, shotcrete technology is widely used because of its high efficiency, flexibility and strong adaptability. This article will introduce the construction process of shotcrete operation in detail, aiming to provide construction personnel with a clear operating guide to ensure construction quality and safety.

　　I. Construction preparation

　　Construction preparation is the first and key step in shotcrete operation. This includes the assessment of the site environment, the inspection of equipment and the training of personnel. The construction team needs to conduct a detailed survey of the operation area, understand the geological conditions, and formulate a reasonable construction plan. At the same time, ensure that all construction equipment is in good condition and that construction personnel are familiar with the operating procedures and safety regulations.

　　II. Treatment of the sprayed surface

　　The treatment of the sprayed surface is an important link in improving the bonding strength and construction quality of shotcrete. First of all, loose materials, oil stains and accumulated water on the sprayed surface should be removed to ensure that the sprayed surface is clean and dry. If necessary, the sprayed surface should be roughened to increase the contact area between the sprayed concrete and the sprayed surface and improve the bonding effect.

　　III. Bury the marking nails of the sprayed layer thickness

　　In order to control the thickness of the sprayed concrete, marking nails should be buried on the sprayed surface before construction as a reference for the spraying thickness. The marking nails should be evenly distributed, and the spacing should be adjusted according to the construction requirements to ensure that the thickness of the sprayed concrete is uniform and meets the design requirements.

　　IV. Machinery is in place

　　Construction machinery, including sprayers, concrete mixers, transportation equipment, etc., should be in place in advance and debugged to ensure normal operation during the construction process. In addition, it is necessary to check the connection of wind, water and electricity to ensure that the operation will not be interrupted due to equipment failure during the construction process.

　　V. Connecting ventilation, water and electricity and testing the machine

　　Connecting ventilation, water and electricity is a necessary step before construction to ensure the power supply during the construction process. After connecting ventilation, water and electricity, all equipment should be tested, the operating status of the equipment should be checked, and faults should be eliminated in time to avoid unexpected shutdowns during the construction process.

　　VI. Initial spraying operation

　　The initial spraying operation is the first stage of spraying concrete construction, which is mainly used to form the foundation layer. During the initial spraying, the spraying angle and distance should be controlled to ensure that the concrete evenly covers the sprayed surface and forms a stable base layer. After the initial spraying operation is completed, the initial setting of the shotcrete needs to be checked to ensure that the concrete can quickly form strength and lay the foundation for subsequent operations.

　　VII. Re-spraying concrete operation

　　The re-spraying operation is carried out after the initial spraying layer reaches a certain strength, mainly used to increase the thickness of the shotcrete to meet the design requirements. During the re-spraying operation, the spraying parameters should be adjusted according to the construction progress and the solidification of the shotcrete to ensure the continuity and uniformity of the shotcrete.

　　VIII. Quality inspection

　　After the construction is completed, a quality inspection should be carried out immediately, including the thickness, strength, and appearance quality of the shotcrete. Quality inspection is a key link to ensure the quality of shotcrete construction. Any parts that do not meet the design requirements should be repaired in time to ensure the quality of the entire project.

　　Through the above steps, we can see the refinement and standardization of the construction process of shotcrete operations, which not only improves the construction efficiency, but also ensures the construction quality. The construction team should strictly abide by the construction process, pay attention to every detail, and ensure the safety and efficiency of the shotcrete operation.