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钢塑土工格栅加入路面结构的作用
日期:2020年 04月 26日 共阅:97次 文章来源:山东肥城联谊工程塑料有限公司
       钢塑土工格栅对路面材料的加固通过钢塑土工格栅与路面材料的相互作用,其相互作用分为格栅表面与混合料摩擦,混合料对格栅肋条的被动阻抗力作用。铺筑碾压时路面材料会嵌挤在钢塑土工格栅的网孔中,三种作用能充分约束混合料的侧向位移。
The reinforcement of the steel plastic geogrid to the pavement materials is through the interaction between the steel plastic geogrid and the pavement materials. The interaction is divided into the friction between the grid surface and the mixture, and the passive impedance force of the mixture to the grid ribs. When paving and rolling, the pavement materials will be embedded in the mesh of the steel plastic geogrid, and the three functions can fully restrict the lateral displacement of the mixture.
       疲劳指在小于材料极限强度应力反复作用下,产生.的累积破坏。疲劳特性以构成破坏所需的荷载作用次数表示。加格栅梁的疲劳寿命比未加格栅梁的疲劳寿命长,有效扩散应力集中,使抗疲劳特性提高。半刚性基层底部加铺筑钢塑土工格栅可延缓半刚性基层疲劳裂缝的扩展。
Fatigue refers to the cumulative failure of. Under the repeated action of stress less than the ultimate strength of the material. The fatigue characteristics are expressed by the number of load actions required to constitute the failure. The fatigue life of the beam with grid is longer than that of the beam without grid, and the effective diffusion stress concentration improves the fatigue resistance. Adding steel plastic geogrid to the bottom of semi-rigid base can delay the fatigue crack growth of semi-rigid base.
       钢塑土工格栅加入路面结构层,可提高路面的抗裂性印。目前用于分析土工合成材料加筋路面结构的力学理论尚不健全,多基于有限的说明理论。钢塑土工格栅是网状结构,网格会被路面材料填充,钢塑土工格栅厚度较小,网材各方向的弹性模量,摩擦等力学参数难以通过实验确定。钢塑土工格栅加筋路面结构受力变形是一种 复合材料中增加相的行为。
Adding steel plastic geogrid to the pavement structure layer can improve the crack resistance of the pavement. At present, the mechanical theory used to analyze the reinforced pavement structure of geosynthetics is not perfect, which is mostly based on the limited explanation theory. The steel plastic geogrid is a mesh structure, the mesh will be filled by the pavement materials, the thickness of the steel plastic geogrid is small, the elastic modulus of the mesh material in all directions, friction and other mechanical parameters are difficult to be determined by experiments. The mechanical deformation of reinforced pavement structure with steel plastic geogrid is a behavior of increasing phase in composite materials.
       沥青路面中存在一定新的结构层,钢塑土工格栅是一种各项异性材料,竖直方向刚度较大,半刚性基层底面在水平方向受弯拉,复合层是介于两者间的竖直向受压的各向异性材料。在有裂缝的路面加铺钢塑土工格栅可降低裂缝处基层底面的应力集中。钢塑土工格栅阻止裂縫通过基层底面反射到沥青混合料面层控制路面开裂。
There are some new structural layers in asphalt pavement. Steel plastic geogrid is a kind of anisotropic material with high rigidity in the vertical direction. The bottom of semi-rigid base is flexural in the horizontal direction, and the composite layer is an anisotropic material between the two. Steel plastic geogrid can reduce the stress concentration at the bottom of the base layer. The steel plastic geogrid prevents the crack from reflecting to the asphalt mixture surface through the base course bottom to control the pavement crack.
      与路面材料嵌锁咬合作用可提高断面的抗剪切传荷能力。有裂缝路面加铺钢塑土工格栅可降低裂缝尖端的剪应力集中。新旧结合处项面加铺钢塑土工格栅可减小基底层拉应力,减少因土体性质不同造成的差异增强了新旧土体的整体性。防止刚性半刚性基层材料过早开。有裂缝路面加铺钢塑土工格栅后车轮中心最大弯沉值减小。
The interlocking action with pavement material can improve the shear load resistance of the cross section. Steel plastic geogrid can reduce the shear stress concentration at the crack tip. Steel plastic geogrid can reduce the tensile stress of the base layer, reduce the difference caused by different soil properties, and enhance the integrity of the new and old soil. Prevent premature opening of rigid semi-rigid base material. The maximum deflection value of the wheel center decreases after the crack pavement is paved with steel plastic geogrid.
       钢塑土工格栅模量变化对加筋效果影响较大,建议施工时尽量采用较大的钢塑土工格栅材料。路基加宽施工中,不均匀变形会产生纵向裂缝,加铺钢塑土工格栅发挥其具有较大形变能力的特点,减小了路面的水平方向变形量,吸收水平方向的位移。随选择钢塑土工格栅模量增加,基层底面拉应力减小,对基层底面剪应力及路面弯沉变化不大。

The change of the modulus of the steel plastic geogrid has a great influence on the reinforcement effect. It is suggested that the larger material of the steel plastic geogrid should be used as much as possible during the construction. In the roadbed widening construction, the uneven deformation will produce the longitudinal crack, and the steel plastic geogrid will play the role of large deformation capacity, reduce the horizontal deformation of the road surface and absorb the horizontal displacement. With the increase of the modulus of the selected steel plastic geogrid, the tensile stress on the bottom of the base decreases, but the shear stress on the bottom of the base and the deflection of the pavement do not change much.

钢塑土工格栅

      钢塑土工格栅的加入提高了半刚性基层材料的抗弯拉强度,在公路路面改建时,在半钢性基层地面铺设钢塑土工格栅,可延长半刚性基层路面的使用寿命。改善半刚性材料的变形能力。钢塑土工格栅的加入大大提高了半刚性基层材料的临界韧度,降低了构件出现裂缝后释放能量的速度,使其由未加入格栅时的脆性破坏向延性破坏过渡。铺设钢塑土工格栅可提高公路的耐久性能。旧路顶面铺设钢塑土工格栅,可减小改建路面底层拉应力,建议在公路改建中使用模量较大的钢塑土工格栅。使其具有较高的刚度。
The addition of steel plastic geogrid improves the bending and tensile strength of semi-rigid base material. In the reconstruction of highway pavement, the service life of semi-rigid base pavement can be extended by laying steel plastic geogrid on the semi-rigid base. Improve the deformation ability of semi-rigid materials. The addition of steel plastic geogrid greatly improves the critical toughness of semi-rigid base material, reduces the speed of energy release after cracks appear, and makes the transition from brittle failure to ductile failure without grid. Laying steel plastic geogrid can improve the durability of highway. Laying steel plastic geogrid on the top of the old road can reduce the tensile stress of the bottom layer of the reconstructed road. It is suggested to use steel plastic geogrid with larger modulus in the reconstruction of the road. It has high rigidity.
     相信大家看完以上内容以后,应该也对钢塑土工格栅加入路面结构的作用有所了解了,希望会对大家有所帮助吧。
I believe that after reading the above content, you should also understand the role of steel plastic geogrid added to the pavement structure. I hope it will help you.
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