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土工格栅如何改善水泥混凝土路面
日期:2020年 04月 29日 共阅:65次 文章来源:山东肥城联谊工程塑料有限公司
      玻璃纤维土工格栅是网状结构沥青混合料的集料可贯穿其中形成一个复合的力学嵌锁体系这种限制阻碍了集料的运动沥青混合料可以得到更好的压实更大的承载能力并能提高传荷能力减少变形具有较高的结构强度。所以玻璃纤维土工格栅在道路罩面中起到了骨架作用。
The glass fiber geogrid is the aggregate of the network structure asphalt mixture, which can penetrate into it to form a composite mechanical interlocking system. This restriction hinders the movement of the aggregate. The asphalt mixture can get better compaction and greater bearing capacity, and can improve the load transfer capacity and reduce the deformation. It has higher structural strength. Therefore, the glass fiber geogrid plays a skeleton role in the road cover.
       路基是公路系统中最重要的结构组织之一,在运输工具变应力的作用下,基础层局部地域承受较大的应力和应变,因长时间局部地域受应力变化,基础层开始出现沉降、位移、开裂等现象。由于基础层的变化,导致路面发生不规则的曲率变化,使路面出现裂缝、起皱等现象。因此,基础层增强十分重要。
Subgrade is one of the most important structural organizations in the highway system. Under the action of the variable stress of the means of transport, the local area of the foundation layer bears large stress and strain. Due to the long-term local stress change, the foundation layer begins to appear settlement, displacement, cracking and other phenomena. Because of the change of the foundation layer, the irregular curvature of the road surface changes, causing cracks, wrinkling and other phenomena. Therefore, it is very important to enhance the basic layer.
      采用经特殊处理的玻璃纤维土工格栅,能使基础层的整体强力大大提高,其作用就像钢筋增强水泥混凝土一样。土与玻纤土工格栅相互作用的加筋机理,在室内进行的大量试验表明:在土体中合理布置玻璃纤维土工格栅,可使土体的垂直应力、水平应力明显降低,土体剪应力(土颗粒之间的磨擦作用)明显提高,土体的抗剪强度得到充分发挥,可以大大提高土体的承载能力,抗变形能力和抗裂能力。玻璃纤维土工格栅在加筋土体中的内聚力效应、隔离效应、波纹效应、拱效应、嵌锁效应等各种加筋效应,有些是先后依次出现的,有些是重叠交叉作用,这些重叠的复合效应,最终将改变或阻止塑性区的形成和发展。
The use of specially treated GFRP geogrid can greatly improve the overall strength of the foundation layer, and its effect is just like that of reinforced cement concrete. The reinforcement mechanism of the interaction between the soil and the glass fiber geogrid. A lot of experiments in the laboratory show that the reasonable arrangement of the glass fiber geogrid in the soil can significantly reduce the vertical stress and the horizontal stress of the soil, significantly improve the shear stress (the friction between the soil particles), give full play to the shear strength of the soil, and greatly improve the bearing capacity of the soil , deformation resistance and crack resistance. The cohesive force effect, isolation effect, corrugation effect, arch effect, inlay effect and other reinforcement effects of GFRP geogrid in reinforced soil, some of them appear successively, some of them are overlapped cross effects. These overlapped composite effects will eventually change or stop the formation and development of plastic zone.
      玻璃纤维土工格栅强度高、刚度大,加入沥青混凝土结构内部,可全面提高路面材料强度和路用性能,并会改变路面结构的应力分布,对其作用机理研究分析表明:
The strength and rigidity of GFRP geogrid are high. Adding into the asphalt concrete structure can improve the strength and performance of the pavement materials, and change the stress distribution of the pavement structure
      ①在旧水泥混凝土板表面设置土工格栅,能够改变沥青层在车辆荷载和温度作用下的受力状态,大幅度地减小接缝处沥青层的应力集中,从而阻碍了反射裂缝的产生和发展。
① Setting Geogrid on the surface of old cement concrete slab can change the stress state of asphalt layer under the action of vehicle load and temperature, greatly reduce the stress concentration of asphalt layer at the joint, thus hindering the generation and development of reflection cracks.
      ②设置土工格栅能够增加路面整体刚度,使沥青层表面弯沉减小,提高提高沥青加铺层的高温抗车辙能力。
② Setting geogrid can increase the overall stiffness of the pavement, reduce the deflection of the asphalt surface, and improve the high-temperature rutting resistance of the asphalt overlay.
      ③高强土工格栅并不是依靠自身的较大变形来扩散应力,其防裂作用实质是一种隔离功能,它分隔了带接(裂)缝尖端的应力集中区域,而由强度较高的土工格栅本身承受较大的拉应力,从而阻碍了裂缝的迅速扩展。

③ High strength geogrid does not rely on its own large deformation to diffuse stress, its crack prevention function is essentially an isolation function。 It separates the stress concentration area at the tip of the joint (crack), while the geogrid with high strength bears large tensile stress, thus hindering the rapid expansion of the crack。

玻璃纤维土工格栅

      注意事项
      matters needing attention
      ①严格控制运送混合料的车辆出入在格栅层上禁止车辆急转向急刹车和倾泻混合料脚料以防止对玻璃纤维土工格栅的损坏。
      ① Strictly control the access of vehicles transporting the mixture. It is forbidden to turn sharply to brake or pour the mixture feet on the grid layer to prevent damage to the fiberglass geogrid.
      ②玻璃纤维土工格栅背胶易溶于水雨天或路面潮湿时不得施工。
      ② Glass fiber geogrid back glue is easy to dissolve in rainy days or when the road surface is wet, construction is not allowed.
      ③格栅铺设时要求路面温度不宜太高。
      ③ When the grid is laid, the road surface temperature should not be too high.
      ④全幅铺设土工格栅时一定要注意施工沥青面层时车辆对格栅的破坏建议在土工格栅铺设完成后.洒适量的瓜米石防止土工格栅粘轮卷曲。
      ④ When laying the geogrid in full width, it is necessary to pay attention to the damage of vehicles to the geogrid during the construction of asphalt surface course. It is recommended that after the geogrid is laid, appropriate amount of guami stone be sprinkled to prevent the geogrid from sticking and curling.
      相信大家看完以上内容,对土工格栅如何改善水泥混凝土路面有了一定的了解了,希望会对大家有所帮助吧。
      I believe that after reading the above content, we have a certain understanding of how to improve the cement concrete pavement with geogrid. I hope it will help you.
      本文词标签:玻璃纤维土工格栅
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