保定市防撞墙模具厂

Template installation

用于防撞墙的模板不宜采用小块组合式钢模板，而应采用大块钢模板。这是因为模板越小， 接缝越多，外观越差，而且接缝处表面不易平整，也易出现漏浆现象。控制钢筋保护层厚度 可使用小石块来填隔钢筋，不宜采用混凝土垫块，以免在拆模后墙体表面出现一块块难看的斑痕，立模时，在防撞墙侧模的顶部与底部分别安装一根用槽钢制作的横带螺丝杆固定。然后，在两侧的槽钢上均匀地安装几根钢支撑杆，使模板的整体得到固定。

It is not suitable to use small combined steel formwork instead of large steel formwork. This is because the smaller the template, the more seams, the worse the appearance, and the joint surface is not easy to smooth, but also prone to leakage phenomenon. Controlling the thickness of the steel protective layer can use small stones to fill the steel bar, not the use of concrete pads, so as to avoid the surface of the wallwww.biaozhimuju.com.cnwww.luyanshimj.cnwww.hupomojus.cnwww.zhangjiajiebanjia.cn www.gelidunmojuz.cn www.liujiaohupoo.cn after the demolition of a piece of ugly spots, when erecting the form, the top and bottom of the side mold of the anti-collision wall are fixed with a cross-strap screw made of channel steel. Then, several steel braces are evenly installed on the sides of the channel steel, so that the overall formwork is fixed.

混凝土质量控制

Concrete quality control

由于防撞墙底宽上窄，其内部的钢筋布置较密，浇注混凝土施工时不利于排除气泡，所以对混凝土的和易性有较高的要求。

Because of the narrow bottom width of the anti-collision wall, the inner reinforcement arrangement is dense, and it is not conducive to eliminate air bubbles in the concrete pouring construction, so the workability of the concrete is higher.

在施工中，为了使混凝土的和易性更好，需要对集料的级配进行认真设计和调整，使其达到 最佳的级配曲线，可采用适当增加水泥用量及适当提高砂率的方法来处理，正常情况可将砂 率提高2%～3%，但砂率不能太大，含砂量过多，会使混凝土中的气泡难以上升逸出。在拌和 混凝土时，要注意拌和时间适当。拌和时间过长，会降低混凝土的和易性；而拌和时间太短 ，又不能得到匀质的混凝土，且会降低混凝土的强度。

In construction, in order to make concrete more workable, it is necessary to design and adjust aggregate gradation carefully so as to reach the best gradation curve. Appropriate increase of cement dosage and sand rate can be used to deal with it. Under normal conditions, the sand rate can be increased by 2%-3%, but the sand rate can not be too high and the sand content is too high. Many will cause the bubbles in concrete to rise and escape. When mixing concrete, pay attention to proper mixing time. Too long mixing time will reduce the workability of concrete, too short mixing time can not get uniform concrete, and will reduce the strength of concrete.