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土石坝,尤其是高土石坝的变形分析或稳定分析,目前都不够成熟。因此多数计算分析成果均有待于模型试验和原体观测来验证。 模型试验有两种:离心模型试验和静力学模型试验。对深复盖层的高土石坝进行离心机模型试验目前还存在下列困难:①模型的尺寸与离心机的半径之比一般不能大于1:10。现有的国外离心机的半径均在2～9m之间(国内离心机的半径很小)。允许的沿重力方向的模型尺寸仅为0.2～0.9m。②制造离心机费用昂贵。③离心机试验用于无粘性土常会遇到一些
Deformation analysis or stability analysis of earth-rock dams, especially high earth-rock dams, is currently not mature enough. Therefore, most of the calculation and analysis results need to be verified by model tests and protosomatic observations. There are two types of model tests: centrifugal model tests and static model tests. The centrifuge model test of a deep earth-rock dam with deep coverings still has the following difficulties: 1 The ratio of the model size to the radius of the centrifuge cannot generally be greater than 1:10. The radius of existing foreign centrifuges is between 2 and 9m (the radius of domestic centrifuges is very small). The allowable model dimension along the gravity direction is only 0.2-0.9m. 2 It is expensive to manufacture centrifuges. 3 Centrifuge tests are often used for non-cohesive soil