空心桥板以其结构简单,施工方便,正在被广泛地运用于公路小型桥梁及农村机耕桥。这种桥型的适用跨度为6～13m.以前预制空心桥板,多采用木制内外模,桥板横剖面如图1所示.现在橡胶制品渐被引用于预制空心桥板的内模。我队从1988年开始采用橡胶芯模浇筑预制圆形空心桥板(图2),以迄于今,取得了较好的效果. Hollow bridge with its simple structure, easy construction, is being widely used in small bridges and rural road machinery plow bridge. This type of bridge for the span of 6 ~ 13m. Previously prefabricated hollow bridge, the use of more internal and external wooden mold, bridge cross-section shown in Figure 1. Now rubber products are gradually being used in precast hollow bridge internal mold. Our team began to use the rubber mandrel casting prefabricated hollow hollow bridge from 1988 (Figure 2), so far, and achieved good results.