Construction Preparation

Including the preparation of necessary materials and equipment, leveling the slope, positioning on-site, laying out, excavation of the footer trench, measuring underwater construction water depth and flow rates, etc.

2. Survey and Stake Out

In accordance with the design drawings, we have laid out the shoulder, toe, and edge lines of the sand-filled slope bags, and marked the elevation points on the corresponding steel or bamboo stakes (considering the potential overall settlement and final acceptance, it is advisable to leave a certain amount of settlement allowance), ensuring thorough preparation for the slope treatment.

3. Bagged Sand Grading

Workers are scheduled to stuff sandbags, but they should not be overly full; filling them to about 60% is ideal. This not only facilitates the workers' movement and relocation but also aids in adjusting the smoothness of the slope. The surface of the slope should be uneven by less than 10cm to ensure a flat and straight gradient.

4. Placement of geotextile bags

Unroll the bags at the designed positions on the slope, ensuring that the bags remain taut as they are opened. Pay attention to maintaining a 30cm overlap width between the concrete of the new bags and the existing bags to ensure a tight seam. The newly laid bags should not be skewed relative to the existing concrete bags, allowing the vertical alignment of the bag edges with the embankment axis to be well maintained.

5. Filling

Concrete is primarily forced to move under the pressure of pump propulsion. The pressure of the concrete decreases rapidly as it moves away from the filling point, expanding outward. As the range of concrete filling within the form bag increases, the difficulty of filling also grows, necessitating continuous tamping and guidance.

6. Geotextile Sack Maintenance

After the concrete grouting is completed, the face concrete is simultaneously cured. The general curing period is 7 days, during which the slope surface must remain moist.