Abstract: In the process of seepage flow of earth-rock dams, the liquid in the pore of soil-stone composite medium would produce pressure change, which acted on the solid skeleton particles of soil-stone composite medium and resulted in a series of changes, such as porosity and deformation of skeleton particle. The porosity and skeleton particle after changes worked on the liquid in the pores in turn and caused the redistribution of its stress field. Hence, the flow regularity of the liquid in the pores and its influence on porosity stress and the coupling effect of stress field and seepage filed must be taken into account in the research of permeability rule for the liquid in soil-stone composite medium. The coupling model of compressible skeleton earth-rock dam was deduced on the basis of related theories. The accuracy and rationality of the proposed model are verified through comparing specific examples, and the verification shows that the relative residuals of coupling results are smaller and closer to actual observation results when the compression of skeleton is taken into account.

Key words: geotechnical engineering, earth-rock dam, seepage field, stress field, coupling

摘要： 在土石坝渗流过程中,土石复合介质孔隙中流体会产生压力变化,变化后的压力作用于土石复合介质的固相骨架颗粒上会引起孔隙率、骨架颗粒变形 等一些列变化，变化后的孔隙及骨架颗粒又反过来作用于孔隙中的流体，引起其应力场的重分布，因此,在研究土石复合介质内流体的渗透规律时必须综 合考虑孔隙流体的流动规律及其对孔隙应力的影响,考虑土石复合介质内应力场与渗流场的耦合作用，采用理论推导可压缩骨架土石坝耦合模型，并通过 具体实例对比模型的准确性及合理性进行验证，验证表明考虑骨架压缩后的耦合结果的相对残差更小，更接近于实际的观测结果。

关键词: 岩土工程, 土石坝, 渗流场, 应力场, 耦合