Geogrid is a kind of material which can strengthen and strengthen. Geogrid is designed as a grid structure. It does not completely separate the soil layer in the soil, and there is friction between the earth and the grid, The integrity and stress strength of soil are increased. There are many kinds of geogrid. At the beginning of construction, according to the design requirements and combined with the construction practice, various materials are compared and selected.
The geogrid is made of high-density polyethylene plastic mesh reinforced material, with rectangular hole, width of 4 N and black. Each roll is 4qm long, which is made of polymer materials under certain temperature control. Its tensile strength is 10 times or higher than that of ordinary plastics. It has the characteristics of "light weight, small deformation, high strength, aging resistance and long service life".
Lay geogrid. On the leveled and compacted subgrade surface, the geogrid shall be paved longitudinally along the subgrade according to the horizontal position of the geogrid that has been set out. A distance of 01M shall be reserved from the outside of the geogrid to the side slope to prevent the geogrid from being exposed. When laying the bottom slope toe of slope section, the base within the scope of Geogrid on the ground at the slope toe shall be spaded into a platform to ensure the horizontal laying of Geogrid and strengthen the stability of subgrade slope.
土工格栅似向接头,采用搭接绑扎,搭接长度不小于30amn, 每隔0 5m布一个结扎点。用低压聚乙烯单线绑扎。铺设摊平时,严禁各种机械设备在裸露的土工格栅上通行作业,卸土后土工格栅幅寬范围内由人工铺土并摊平,防止被机械设备碾断以保证土工格栅平整.不起鼓,不起皱。
The similar joints of geogrid shall be bound with lap joint, the lap length shall not be less than 30 amn, and a tie point shall be arranged every 0.5m. Bind with low-pressure polyethylene single wire. During paving and spreading, it is strictly forbidden for all kinds of mechanical equipment to pass through the exposed geogrid. After unloading, the geogrid shall be paved and leveled manually within the wide range of the geogrid, so as to prevent it from being broken by mechanical equipment to ensure the geogrid is flat, bulge free and wrinkle free.
(1) The geogrids produced in China are all black. If they are stored in the open air and exposed to sunlight for a long time during construction, they will accelerate the aging speed and reduce their service performance. Therefore, they should be stored in a dark place. They can be stored if possible.
(2) When geogrid is used to reinforce the embankment slope of expansive soil, there are not only clear requirements for the performance of geogrid itself, but also strict requirements for the particle size of filler. The material is suitable for the reinforcement of subgrade slope with fine-grained soil as filler. The massive soil can only be filled after being disintegrated to avoid cutting off the geogrid and affecting the reinforcement effect.
(3) Another important factor affecting the geogrid reinforcement is the control of the optimum moisture content of the filler. According to the different soil properties of the filler, the moisture content is controlled to the optimum value during construction. The higher the compaction density value is, the better the reinforcement effect is.
(4) Because the expansive soil has the characteristics of wet expansion and dry shrinkage, the geogrid should be laid in the season with less rain. In order to control and improve the water content of expansive soil, the effect of slope reinforcement is the best.
I believe that after reading the above content, you should also know something about geogrid reinforcement of expansive soil embankment slope, and hope to know something about you.