碎石桩复合地基是由碎石桩及其周围土体共同组成的,其中碎石桩体是由散体岩石碎块组成,它同周围土体一样是一种散体介质。它的形成及承重必须依靠周围半无限土体的侧限阻力。因此,它与嵌固于半无限体中的胶结整体柱是不一样的。这种地基更接近于不均质地基,因此,可把碎石桩复合地基视为不均质的半无限体。在荷载作用下,不均质土体的应力 The gravel pile composite foundation is composed of the gravel pile and the soil around it. The gravel pile is composed of loose rock fragments, which is a kind of loose medium like the surrounding soil. Its formation and bearing must depend on the lateral resistance of the surrounding semi-infinite soil. Therefore, it is not the same as a cemented monolithic column embedded in a semi-infinite body. This foundation is closer to an inhomogeneous foundation. Therefore, the composite foundation of gravel piles can be regarded as an inhomogeneous semi-infinite body. Under stress, inhomogeneous soil stress