Concrete structural crack repair and reinforcement
Building reinforcement is a branch of civil engineering construction. Statistics show that many old houses built in the 1950s and 1960s in our country need reinforcement as they have exceeded their design life. Approximately one-third of residential buildings across the nation have insufficient safety reserves, and the urban residential structures are gradually aging, necessitating reinforcement and maintenance. At the same time, with the consideration of cost-saving, the use of many old structures and buildings is increasing, leading to a growing number of projects requiring reinforcement.
Grouting reinforcement for buildings is a technique that enhances structural stability by injecting slurry into the foundation or walls. Its basic principle is to fill the voids, cracks, or hollows in the foundation or walls with slurry, thereby improving the strength, compactness, and impermeability of the structure. The grouting materials typically include cement slurry, chemical slurry, or composite slurry. During construction, holes are drilled to inject the slurry into the target area, where it spreads and hardens under pressure, ultimately forming a solid reinforcement layer. This method is suitable for addressing issues such as building settlement, cracks, and leaks.

The quality control of grouting reinforcement for buildings is crucial for ensuring the project's effectiveness. A detailed survey is required prior to construction to determine grouting parameters; strict control over slurry proportion, grouting pressure, and flow rate is needed during construction; and post-construction, the reinforcement effect must be evaluated through testing methods. Common testing methods include drilling for samples, ultrasonic testing, and load tests.

The construction process for grouting reinforcement of buildings includes surveying, drilling, installation of grouting pipes, slurry preparation, grouting, and effect detection. Firstly, conduct a detailed survey of the building to determine the reinforcement area and grouting parameters; then, drill in the target area and install the grouting pipes; next, prepare the slurry in the correct proportions and inject it into the target area using a high-pressure pump. During the grouting process, control the pressure and flow rate to ensure even distribution of the slurry. Finally, evaluate the reinforcement effect through detection methods such as ultrasonic testing or core sampling.

Construction equipment for grouting reinforcement of buildings mainly includes drilling machines, grouting pumps, mixers, and testing instruments. Drilling machines are used for boring holes, grouting pumps for injecting slurry into the target area, mixers for preparing slurry, and testing instruments for monitoring construction quality and effectiveness. Modern grouting equipment typically features automated functions to enhance construction efficiency and accuracy.