Three-dimensional composite drainage network is a commonly used material in major projects. So, how should it be reinforced?
1. Basic structure and characteristics of three-dimensional composite drainage network
Three-dimensional composite drainage net is made of three-dimensional geonet double-sided bonded geotextile, so it not only has the anti-filtration effect of geotextile, but also has the drainage and protection effects of geonet. Its unique three-dimensional structure can withstand high compressive loads throughout use and maintain a considerable thickness, which can provide good hydraulic conductivity. It also has excellent characteristics such as high tensile strength, high shear strength, corrosion resistance and aging resistance.
2. Reinforcement method of three-dimensional composite drainage network
1、Foundation treatment
Before laying the three-dimensional composite drainage network, the foundation must be properly treated. The foundation should be flat and compacted to ensure that there are no sharp stones, tree roots and other debris, so as not to puncture the drainage net. Weak foundation should be reinforced to improve the bearing capacity and stability of the foundation.
2、Overlap and fixation
When laying the three-dimensional composite drainage network, the overlap length should be determined according to the design requirements and actual construction conditions, generally not less than 15 cm。 The fixing method can be adopted U Type nails, joints or nylon ropes, etc., ensure that the connection between the drainage net and the foundation or adjacent drainage net is firm to prevent sliding and displacement.
3、Backfill and compaction
After the laying of the three-dimensional composite drainage network is completed, backfilling treatment should be carried out in time. The backfill material should choose gravel or gravel soil with good water permeability, and be backfilled and compacted in layers. The compaction degree must meet the design requirements to ensure a good contact and drainage channel between the drainage network and the backfill material.
4、Stiffened treatment
In order to improve the reinforcement effect of the three-dimensional composite drainage net, reinforcement materials, such as geogrid and geotextile, can also be laid on it. Reinforced materials can enhance the tensile strength and shear strength of drainage net and improve its overall stability. The laying method and number of layers of reinforced materials should be determined according to the specific engineering requirements.
5、Edge processing
The edge treatment of the three-dimensional composite drainage net is also very important. The edge part should be treated with special methods, such as setting drainage ditches, installing edge fixing devices, etc., which can prevent water from seeping out of the edge or the edge of the drainage net from being damaged.
3. Evaluation and monitoring of reinforcement effect
After the reinforcement is completed, its reinforcement effect should be evaluated and monitored. The evaluation method can adopt field test, laboratory test or numerical simulation, which can verify whether the reinforcement effect meets the design requirements. The drainage network should also be inspected and maintained regularly to ensure its long-term stable operation.
It can be seen from the above that the reinforcement treatment of the three-dimensional composite drainage network is the key link to ensure its full performance. Through foundation treatment, overlapping and fixing, backfilling and compaction, reinforcement treatment and edge treatment, the bearing capacity and stability of drainage network can be improved and its service life can be prolonged. In actual engineering, it is necessary to select appropriate reinforcement methods and materials according to specific engineering requirements and geological conditions to ensure the quality and safety of the engineering.
Post time: Apr-30-2025
