| 摘要 |
A concrete silt fence constructed of a plurality of very thin, steel reinforced concrete panels that are aligned side by side and fixed in a trench in the ground to form a fence. Each of the panels is constructed of reinforcing steel bars and concrete. The steel bars are aligned parallel to each other and centered in the neutral axis of the panel. A steel bar is provided adjacent each of the two side walls of the panel to provide shear strength to the side edges of the panel, and one or more steel bars are provided between these two outside steel bars. A thin coating of concrete is poured around the reinforcing steel bars so that each pre-cast panel contains so little concrete that it does not satisfy the American Concrete Institute's standard for minimum concrete cover of reinforcement for pre-cast concrete wall panels that are exposed to earth or weather.
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