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西北黄土高原,塬高沟深。黄土冲沟深一般在30～100米不等。沟內工程地质以黄土质砂粘土为主,复盖层厚。黄土呈大孔隙性土壤,直立性好而承载力低,只2.0kg/cm~2左右,且附近石料缺乏。在这些黄土深沟中修建桥梁,必须适应当地特点。特别是对于在非岩石地基上如何节省圬工、减轻墩身重量、解决地基承载力低的问题,是一个比较突出的问题。 1966年,我们在××线上(九级地震区),设计和建造了两座高桥,桥墩采用了钢筋混凝土薄壁圆形高墩。在设计和施工过程中,我们遵照伟大领袖毛主席“精心设计,精心施工”的敎导,不断总结经验,克服了一系列困难,
Northwest Loess Plateau, Gaogou deep. Loess gully depth generally ranging from 30 to 100 meters. Gully engineering geological loess sand clay-based cover layer thickness. Loess is a macroporous soil, good erection and low bearing capacity, only about 2.0kg / cm ~ 2, and the lack of nearby stone. The construction of bridges in these loess ditches must be adapted to local characteristics. Especially for non-rock foundations on how to save workers, reduce pier body weight, to solve the problem of low bearing capacity of the foundation, is a more prominent issue. In 1966, we designed and built two high-rise bridges on the line of XX (Grade 9 earthquake area). The piers are made of thin-walled circular high-rise concrete piers. In the process of design and construction, in accordance with the guidance of Chairman Mao, the great leader, “carefully designed and carefully constructed,” we constantly sum up our experience and have overcome a series of difficulties,