混凝土采用预拌混凝土，混凝土用搅拌运输车送至施工现场后用混凝土输送泵压送至模板内，其摊铺厚度应高于设计厚度15～20%。
The concrete are pre-mixed concrete, delivered to site with mixer car and then pumped into forms. The paving thickness shall be 15~20% higher than the designed value.
若将预拌混凝土的生产与泵送施工相结合，利用混凝土搅拌运输车进行中间运送，可实现混凝土的连续泵送和浇注。
It can realize the pump transport and concrete agitation continuously by corresponding with concrete produce and pump construction, and using the concrete agitation truck to transport the concrete.
利用测得的混凝土搅拌车拌桶螺旋线上的一组离散点，通过最小二乘法拟合出了求解拌桶螺旋线螺旋角的公式。
Making use of the points measured on the drum helical curve of concrete-mixer truck, the helical Angle formula of the helical curve is obtained by means of least square method.
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