| 摘要 |
A composite arch structure and method of making it are taught. The composite arch structure comprises a pair of retaining wall portions and a top arch portion extending therebetween. A stiffening and load distributing member is structurally affixed to the top arch portion and extends longitudinally of the composite arch structure for the majority of the length of the structure. The composite arch structure preferably also includes longitudinally extending, load spreading buttress means on either side of the vertical axis of the structure at positions where a radial force acting on the structure forms an angle of about 45 DEG or more to the horizontal.
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