Plastic Geogrid do convergence of new and old roadbed to prevent road settlement cracks, asphalt pavement cracks reflection, convergence at the trench and embankment, new and old roadbed lap filling stage stratified measures taken, can play a role in cracking some extent, but not completely prevent subsidence cracks. Plastic Geogrid with the traditional grid more strength, strong carrying capacity, corrosion resistance, aging, friction coefficient, hole uniform, convenient construction, long service life compared. Plastic Geogrid more adapted to deep-sea fishing, embankment reinforcement, a fundamental solution to the low intensity of other materials gabion of long-term water erosion caused by poor corrosion resistance, short life and other technical problems. Plastic Geogrid can effectively avoid the construction process is rolling equipment, damage caused by construction damage. Soft surface in the laying of lateral displacement constraints best. Why do I say geogrid reinforcement of soft soil shallow effect on the stability of Highway Soft-site monitoring, calculation parameters determined by soil and geogrid test;? The use of finite element theory, shallow soft soil In the case of ground grading load stability, and to analyze the factors affecting the effect of geogrid reinforced. The results show that: the lateral displacement and vertical displacement values ??and field observations are consistent theoretical calculations; laying geogrid can effectively control the lateral displacement of soft soil, while reducing the vertical displacement effect is not obvious embankment; (1) formation of soil, so the soil base to maintain proper cross slope to avoid water highway center. (2) covered with plastic composite geogrid. When the road is wide may be a few pieces of plastic composite geogrid take wide, take the head width of about 0.3m, due to broken Dan Duishi the cloth has a protective effect, it does not have to use other methods lap. (3) using a bulldozer to push the gravel layer plastic composite geogrid. On, and the compacted gravel layer to the design height. Wheels do not open directly into the plastic composite geogrid above, the aggregates do not fall directly into the plastic composite geogrid, bulldozer blades should maintain a certain height, so as not to damage plastic composite geogrid, pushing gravel The direction should head in the same direction and take. But for some high-plastic composite geogrid tension and high elongation, can be directly cases gravel on plastic composite geogrid. (4) another layer of plastic composite geogrid same width on the gravel layer, and then laying the roadbed and pavement. (5) If the plastic composite geogrid suddenly damaged brigade work, where can remove rubble and other debris. According to the size of the damage at the ride plus 0.3m head, plastic composite geogrid patch on the damaged place can be. ? With the increase of embankment fill, steel geogrid tension gradually increased, and geogrid tensile peak gradually moving towards the direction of the trend roadbed midline; reinforced modulus increases, the slope at the foot of each geogrid constraint point of lateral displacement increases, had no effect on the bottom of the embankment settlement changes; laying multilayer geogrid better than laying a layer of treatment effect, but not significant; if only laying a layer of geogrid, then the soft soil The best surface for laying the foundation of the effect of lateral displacement constraints. Plastic Geogrid laying can effectively control the lateral displacement of soft soil, while reducing the effect of the vertical displacement embankment obvious. After laying geogrid, Soft maximum lateral displacement of the gradual trend towards the development of deep, significantly reduced the inside of the embankment toe vertical displacement 2.5m depth range. With the increase of embankment fill, geogrid tension is also increasing, and grill peak tension gradually moving towards the direction of the trend midline roadbed. Plastic convex node geogrid used in many places, play a protective role, sometimes because of environmental needs, when you need to move steel geogrid convex node, especially bearing on the requirements of the tension on the grid when the force is moving very important! (1) Plastic Geogrid convex node by the chamber sidewall close, single-wide same time drawing a larger force, but its peak is not very different, always the same convex node steel grille The displacement of the large convex node translational rigid steel grille earlier time, but peaked at almost the same time: the interface peak shear strength and stiffness was no significant difference may be related to undrained unsaturated compacted Sun dilatancy of filling the obvious related. (2) After a period of testing, drawing rate is large, the pulling force is growing rapidly, a large drawing force peak and peak intensity of the interface, the interface may be reinforced soil particles fill redirect rate, and non-saturation pressure of 9 soil, water, gas discharge rate and other factors. (3) the overlying load is large, convex node steel grille of large deformation, steel geogrid convex node rigid translational occurred late, when the pulling force rigid translational closer to the peak; smaller overlying load (50 kPa), the interface friction resistance more uniform; and the overlying load is large, non-uniform distribution of interfacial friction resistance; after pulling force reached its peak, the deformation of the grid can be increased, the When the cover load is small, small amount of deformation after the peak. (4) Overall fooled overlying load greater pullout strength geogrid rigid translational rate increases closer to the peak, while a smaller proportion of the peak convex node rigid flat steel geogrid momentum of its displacement . (5) the overlying load and the pulling force is different, different deformation of convex node steel grille and the relative displacement of the tendon soil, resulting in the distribution of interfacial friction resistance along the length of the grille embedded uneven loads of different overlying Different non-uniformity may result in a smaller interface overlying average friction under load but larger steel geogrid convex node interface constitutive features associated deformation on the interfacial friction resistance 41 = uniform degree of influence and tendons. (6) Interface average friction with rigid displacement relative displacement curve represents a somewhat ideal rigid-plastic characteristics of the overlying load this feature is larger and more obvious: Because convex node geogrid Plastic deformation, drawing nearly end displacement average friction interface represented a relative displacement curves are somewhat ideal elastoplastic characteristics; tendons within 1-2 cm soil relative displacement range, the interface is generally up to the peak intensity, no significant post-peak softening; overlying load is large, convex node interface flat rigid steel grille average friction when moving large! advantage of using plastic composite geogrid plus sleepy road more prominent. First, the plastic composite geogrid is commanded as a variety of chemical fiber manufacturing, non-perishable, years of use and intensity is almost constant. Secondly, in the construction process plastic composite geogrid in the highway, no special techniques, and construction progress faster, you can drive the car a short time. Third, good road stability plastic composite geogrid construction, easy to twist bad. Required gravel roadbed material can be thinned, consolidate the foundation of the work can be reduced. Fourth, almost plastic composite geogrid construction at various school degree. In addition, the effect of the road can also improve drainage and reduce gravel varieties, frozen tomb reduce road capacity, improve the carrying capacity of the road and so on. The United States has in the soft soil near the bridge at the construction of a section of the road test to have more plastic composite geogrid and non-plastic composite geogrid performance when. Experiments road length 62m, width 3. 7m, top soil is CBR (azimuth ratio) of 25cm thick clay 0.7-1.0, and lower for 36cm thick gravel roadbed. Highway divided into three, namely, not plastic composite geogrid, polyester needle with Bidim towards plastic composite geogrid (407g / II), as well as with a woven nylon plastic composite geogrid (628g / m2). Plastic composite geogrid placed between the gravel roadbed and earth sign. 5t with carrying cargo trucks on the road back and forth with this test. On the unpaved road plastic composite geogrid, 200 travel and causing 28c m deep ruts, covered with a plastic composite geogrid Bidim road, after 2500 caused the same deep ruts and Plastic composite geogrid was not muster soil base and tear. If the same result after traveling 200 times 28c m deep ruts, the shop after the plastic composite geogrid can reduce the thickness of the gravel is about 27%. Another section shop woven nylon fabric stage a road to 3700 times before forming a 28cm deep ruts, gravel can save 48%, the best in this type of plastic composite geogrid, but the price is higher. Visible from the above test, plastic composite geogrid to build on the foundation of poor roads. There are good stabilizing effect. In short, the use of soil satin, can increase the stability of the road, long life, the savings in material and construction costs, as well as long-term road maintenance and repair costs, much higher than the cost of plastic composite geogrid is faster and better roads method province. Therefore, in recent years more and more of the world's highway construction using plastic composite geogrid. ? With the development of society, the various modes of transport came into being, in order to shorten the travel time, improve travel efficiency, a variety of cars, trains, motor car, high-speed rail have emerged, take the motor car, high-speed rail can effectively shorten the distance, even if the two cities will soon have to be far away to reach, easy for us to travel. These vehicles can be normal driving and road very relevant, so each road on Highway Authority continue to strengthen, high-speed railways, tunnels and other maintenance, in order to improve the quality of road embankment construction materials must be selected, which may improve the road capacity, effectively control the rut, reflective crack control, slow road extent of the damage and prolong the life of the road. Geotextile material for the construction is very important, its variety, complete model specifications, the quality of construction, provide a guarantee. Plastic Geogrid where there are different types, mainly one-way, two-way geogrid bonding welding, adhesive welding geogrid, shaped plastic composite geogrid classification based, to meet the highway, railway, embankment , abutments, construction of access roads, piers, revetment, levees, dams, beach management, freight yard, residue field, airports, stadiums, green building, soft soil reinforcement, retaining wall, slope protection and road construction anti inferior civil engineering use, Construction for the irreplaceable. Here, you must be very question, steel geogrid really have to say so, okay? Plastic Geogrid What are the specific advantages of it? Feicheng Engineering Materials Co., Ltd. Sheng Li reached your details: Sheng Li Dasheng production cost of steel grille province, through a number of project examples prove that the use of Sheng Li reached steel grille framed reinforced soil engineering and traditional way to build a similar project compared to the cost savings of 10% -50%. Li Sheng up steel grille Rally, per meter vertical and horizontal tensile yield strength can reach 20-150KN, through transportation, railway, water conservancy and three product quality supervision and inspection center. Effect, steel mesh grille cast convex node structure, and enhance the role of the grille with interlocking engagement rock, and could restrain lateral displacement of soil, and enhance the foundation bearing capacity, reduce the overall settlement of the soil and improve soil uneven settlement body, strengthen the foundation for overall performance, and can prevent surface cracking. Plastic Geogrid yield elongation ≤3%; convex plastic geogrid node yield elongation ≤10%, in the use of deformation. Sheng Li-plastic grille up cast convex node connection with vertical and horizontal ribs constitute grille, its high junction strength, shear strength of welded grid nodes ≥1.5MPa, convex grille node node limit peel force ≥300N. Steel grille laying, positioning is extremely simple, easy and smooth. Width 2m-4m, fewer joints, can be worn lock connection, short construction period. Results show that many actual construction, Sheng Li steel grille up compared to other brands of long product life geotextile material, plastic material to protect high-strength steel, plastic grille also force the material, it has acid, alkali, salt corrosion and chemical properties scientific formula with anti-aging, anti-oxidant properties. Applicable to all types of permanent works, the service life of up to a hundred years or more. Highway or runway bit by life, to a large extent determined by the drainage system under the road. Poor road drainage system under the roadbed will contain water, so that the carrying capacity of the road to reduce the tomb. Subgrade moisture longer time, the shorter the life of the road. Highway drainage system under the road surface can be porous sheet, so the roadbed and subgrade moisture flow away from the road on both sides of the porous sheet, seepage ditch can also be used to allow water from the sewer pipe has no flowing powder to go. Seepage layer is composed of gravel road under a variety of layered arrayed. Seepage layer and as wide as the road. When the composition of the seepage layer plastic composite geogrid and gravel base and subgrade soil moisture can seep through the plastic composite geogrid, and then flow away from the gravel road on both sides of the porous sheet, then steel-plastic composite geogrid not only played the role of water seepage, and also separates the gravel roadbed, subgrade, on the road also played a role in reinforcement. This not only reduces the required gravel types, eliminating the need for filtration of sand, but also reduce the thickness of the roadbed, shorten construction time.