Key Points Of Geogrid Construction
1.Construction site: required compaction, flat, horizontal and clear spines.
2.In smooth compaction geogrid laying site, installation of the grid the main stress direction (longitudinal) should be perpendicular to the axis of the embankment, laying should be smooth, no wrinkles, as far as possible tension. With the plug pin and the earth pressure is fixed, the laying of the grille main stress direction is best long without joint connection between the amplitude and the amplitude of the manual banding lap, lap width not less than 10 cm. If the grille is set above two layers, there should be a misjoint between the layer and the layer. After the large area is laid, the flatness should be adjusted as a whole. When a layer of soil is filled, the grille should be used again before the roller is crushed, and the grille should be uniform in strength, so that the grille is in the state of tension in the soil.
3.Selection of packing: the packing should be selected according to the design requirements. It has been proved that it can be used as filler except frozen soil, marsh soil, domestic waste, Cretaceous soil and diatomite. However, the mechanical properties of gravel soil and sand soil are stable, and the water content is very small and should be selected first. The particle size of the filler shall not be more than 15cm, and the gradation of the packing is controlled in order to ensure the compacting weight.
4.The paving and compaction of the packing: when the grille is laid, it should be filled with soil in time, and the exposed time should not exceed 48 hours. First spread the packing at both ends, fixed the grille, and then push it into the middle. The rolling order is on both sides and back in the middle. The roller can not contact with the bar directly when the roller is rolled, and the non compacted stiffeners generally do not allow the vehicle to drive on it so as to avoid the dislocation of the tendons. The degree of compaction is 20-30cm. The compaction degree must meet the design requirements, which is also the key to the success or failure of reinforced earth engineering.
5.Waterproof and drainage measures: in the reinforced soil engineering, we must make well drainage treatment inside and outside the wall. We must protect the feet and prevent erosion. In the soil, we need to set up drainage and drainage measures. When necessary, Geotextiles and permeable pipes should be set up. The way of drainage is not blocked by the way of dredging, otherwise the hidden danger will be produced.
