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为什么公路上要用钢筋网?

添加时间:2020-02-01      发布人:http://www.jzqgc.com

钢筋混凝土路面用钢筋网的更小直径及间距应符合现行行业标准《公路水泥混凝土路面设计规范》JTGD40的规定。当采用冷轧带肋钢筋时,钢筋直径不应小于8mm、纵向钢筋间距不应大于200mm,横向钢筋间距不应大于300mm.焊接网的纵横向钢筋宜采用相同的直径,钢筋的保护层厚度不应小于50mm.钢筋混凝土路面补强用的焊接网可按钢筋混凝土路面用焊接网的有关规定执行。
The minimum diameter and maximum spacing of steel fabric for reinforced concrete pavement shall comply with the provisions of the current industry standard code for design of highway cement concrete pavement jtgd40. When cold-rolled ribbed steel bars are used, the diameter of steel bars shall not be less than 8 mm, the spacing between longitudinal steel bars shall not be more than 200 mm, and the spacing between transverse steel bars shall not be more than 300 mm. The longitudinal and transverse steel bars of welded mesh shall be the same diameter, and the thickness of protective layer of steel bars shall not be less than 50 mm. The welded mesh used for reinforcement of reinforced concrete pavement can be implemented according to the relevant provisions of welded mesh used for reinforced concrete pavement.
混凝土路面与固定构造物相衔接的胀缝无法设置传力杆时,可在毗邻构造物的板端部内配置双层钢筋网;或在长度约为6一10倍板厚的范围内逐渐将板厚增加20%.混凝土路面与桥梁相接,桥头设有搭板时,应在搭板与混凝土面层板之间设置长6一10mm的钢筋混凝土面层过渡板。当桥梁为斜交时,钢筋混凝土板的锐角部分应采用钢筋网补强。
When the expansion joint connecting the concrete pavement and the fixed structure cannot be provided with a dowel bar, a double-layer steel mesh can be arranged in the end of the slab adjacent to the structure; or the slab thickness can be gradually increased by 20% within the range of about 6-10 times of the slab thickness. When the concrete pavement is connected with the bridge and the bridge head is provided with an approach slab, a 6-10 mm long reinforced concrete surface layer shall be set between the approach slab and the concrete surface slab to pass through Cross board. When the bridge is skew, the sharp corner of the reinforced concrete slab shall be reinforced with steel mesh.
济南钢筋批发
混凝土面层下有箱形构造物横向穿越,其顶面面层底面的距离小于400mm或嵌入基层时,在构造物顶宽及两侧,混凝土面层内应布设双层钢筋网,上下层钢筋网各距面层顶面和底面1/4一1/3厚度处。
There is a box structure crossing under the concrete surface. When the distance between the top surface and the bottom surface of the surface is less than 400mm or embedded in the base layer, the double-layer reinforcing mesh shall be set in the concrete surface layer at the top width and both sides of the structure, and each of the upper and lower reinforcing mesh shall be 1 / 4-1 / 3 thick from the top and bottom surface of the surface layer.
混凝土面层下有圆形管状构造物横向穿越,其顶面面层底面的距离小于1200mm时,在构造物两侧,混凝土面层内应布设单层钢筋网,钢筋网设在距面层顶面1/4一1/3厚度处。
There is a circular tubular structure crossing under the concrete surface. When the distance between the top surface and the bottom surface of the surface is less than 1200mm, a single layer of reinforcing mesh shall be arranged in the concrete surface on both sides of the structure. The reinforcing mesh shall be set at the place 1 / 4-1 / 3 of the thickness from the top surface of the surface.
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