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本文是根据国外七十年代初开始应用的加筋土原理而提出的“加筋砂砾(卵)换土地基”没计计算方法。由于尚未通过试验,故仅能就中小桥涵(或其它建筑物)软土地基如何应用作一探索。目的在于解决充分发挥砂砾填料的作用;减少开挖深度甚至可变深基方案为浅基方案。此外算例中的荷载相当于梁式大桥荷载故用钢量似稍多,对用于中小桥涵则可减少耗钢量。如能根据我国具体情况以廉价材料(如竹筋、人造纤维编织料或柴排等)则可达到经济实用的效果。
This article is based on the principle of reinforced earth applied in the beginning of 1970s in foreign countries. The calculation method of reinforced gravel (egg) for soil replacement is not included in the calculation. As not yet passed the test, it can only explore the application of soft soil foundations of medium and small bridges (or other buildings). The purpose is to solve the problem of giving full play to the role of gravel packing; to reduce the depth of excavation and even to change the deep foundation plan into a shallow foundation plan. In addition, the load in the example is equivalent to that of the girder bridge. Therefore, the amount of steel used in the girder bridge seems to be slightly more, and the consumption of steel can be reduced for the medium and small bridges and culverts. If we can according to our specific situation with cheap materials (such as bamboo tendons, man-made fibers woven or firewood, etc.) can achieve economic and practical results.