Brief introduction of uniaxial tensile geogrid;
Unidirectional tensile geogrid is a kind of high-strength geotechnical material, which is made of high polymer as the main raw material, adding certain anti-ultraviolet and anti-aging additives, reorienting the originally dispersed chain molecules into lines after unidirectional stretching, extruding them into thin plates, punching them into regular pore networks, and then stretching them longitudinally. In this process, the polymer is oriented and linear, forming an oblong network structure with uniform distribution and high node strength.
Uniaxial tensile geogrids are mainly used for:
1、? One-way geogrid is used to reinforce soft foundation: because of its lateral constraint on road subbase, geogrid can quickly improve the bearing capacity of foundation, control the settlement development, and effectively distribute the load to a wider subbase, thus reducing the thickness of subbase, reducing the project cost, shortening the construction period and prolonging the service life.
2、? One-way geogrid is used for reinforced asphalt or cement pavement: geogrid laid at the bottom of asphalt or cement pavement can reduce rutting depth, prolong pavement fatigue life, reduce asphalt or cement pavement thickness and save cost.
3、? One-way geogrids are used to strengthen embankment slopes and retaining walls: traditional embankments, especially high embankments, often need to be overfilled, and the edge of the shoulder is not easy to be compacted, which leads to the phenomenon that the later slopes are flooded by rain, and collapse and instability sometimes occur. At the same time, it needs a gentle slope, covering a large area, and the retaining wall has the same problem. Reinforcing embankment slopes or retaining walls with geogrids can reduce the occupied area by half, prolong the service life and reduce the cost by 20-50%.
4、? One-way geogrids are used to reinforce river seawalls: they can be made into gabions to be used together with geogrids to prevent the dykes from collapsing due to seawater erosion. Gabion is permeable, which can slow down the impact of waves, prolong the life of dams, save manpower and material resources and shorten the construction period.
5、? Using one-way geogrid to treat landfill: the combination of geogrid and other geosynthetics can effectively solve the problems of uneven settlement of foundation and emission of derived gas, and can maximize the storage capacity of landfill.
6、? Special use of one-way geogrid: low temperature resistance. After repeated cold and hot cycles of -45℃-50℃ for 200 times, all performance indexes meet the requirements, and pass the test of Qinghai-Tibet Railway, which is suitable for the bad geology of less frozen soil, more frozen soil and high ice content frozen soil in the north.
Technical parameters of uniaxial tensile geogrid;
1, specification: GSB30-30? GSB40-40？ GSB50-50？ GSB80-80？ GSB 100- 100？ GSB 125- 125？ GSB 150- 150 .
2、? Mesh size? Hmm? : 12.7 x 12.7 ~ 25.4 x 25.4 .
3、? Tensile strength? KN/m？ .
4. Vertical: ≥30? ≥40? ≥50? ≥80? ≥ 100? ≥ 125? ≥ 150。
5、? Horizontal direction: ≥30? ≥40? ≥50? ≥80? ≥ 100? ≥ 125? ≥ 150。
6、? Elongation; %? ≤4? ≤4? ≤4? ≤4? ≤4? ≤4? ≤4。
7、? Temperature resistance? ℃:? - 100-280? - 100-280? - 100-280? - 100-280? - 100-280? - 100-280? - 100-280。
The above is an introduction of Bian Xiao's knowledge sharing about the related uses and technical parameters of uniaxial tensile geogrids. Uniaxial tensile geogrid is suitable for strengthening foundation and has good anti-consolidation effect on some river dams. Unidirectional tensile geogrid has been widely used in the construction and maintenance of Qinghai-Tibet Railway because of its low temperature resistance, and it also reduces a lot of troubles for engineers and technicians in the work process. Bian Xiao's introduction ends here.