| Anti-sliding pile especially the pile with prestressed anchor cable and the foundation beam with prestressed anchor cable including the single beam and the frame, are the new pattern structures of the pile-anchor system that have been widely used in the slide-resistant engineering. Studies on designing theory of these structures are delayed greatly than their applications. There are no specifications to consult and there are many problems when designing and computing these structures. Due to their large applications, it is an emergent work to study the designing theory and establish specifications. This thesis develops the research of these aspects basing on the constructive science and technology item of the westward traffic.First, the computation theory of the anti-sliding pile has been researched including interaction between the pile and the landslide, the mechanical model of the pile and the calculation method of the internal force of the pile with prestressed anchor cable. Second, the internal force status, the mechanical computation model and the design method of the foundation beam with prestressed anchor cable have been analyzed. Finally, by the example, engineering instance and the geology mechanical model test, the main results and conclusions deduced from the thesis have been compared and validated. By research, the main results and conclusions gained can be expressed as follows.1. Present the fundamental of computing the landslide thrust, that is, the method should accord with the stabilization method of the landslide, so that the thrust can correspond with the stabilizing factor. In order to modify the disadvantage of the existing method for computing the landslide thrust that is not applicable for larger scope, 5 types of the slip surfaces have been given with the computation formula of landslide thrust respectively.2. The transfer mechanism has been analyzed for the landslide thrust between the pile and slope using the soil arching theory and a model is put up for the thrust's transfer mechanism and the part acting on the pile can be computed by the formula given. According to the character that the soil can endure the pressthan the tensile strength, the arching shape of the soil arch between piles has been regarded as the reasonable arch axes. By analyzing the mechanical balance condition of the arch, the transfer mechanism of the thrust has been gained. At the same time, the formula for computing the thrust acting on the pile has been gotten, and the present computing formula is just the special example of it. Basing the stress status of the arch, the necessary limit conditions for the existence of the soil arch have been gained and these conditions can be used to decide the maximum pile spacing. These conditions not only ensure the slope's endurance to develop but also ensure the safety of the control engineering.3. Propose a new model of the interaction of the pile and landslide, the displacement model. Compared with the present model, the new model doesn't suppose the distribution of the thrust behind the pile, but computes the distribution using the relative deformation of the pile and slope when taking the displacement of the sliding mass as a kind of form that the system can produce according to the displacement character of the sliding mass. For the anti-sliding pile on the linearly elastic foundation, the differential expressions for the pile are given when the sliding mass behind the pile moving with the same displacement. The finite element programming has been programmed.4. Research has been carried on the mechanical computation model for the anti-sliding pile, including linearly elastic two-constant foundation model, elastic-plastic foundation model. The details of the finite element have been given and programmed. Also, making use of the displacement model, the thesis has analyzed the interacting mechanism of the double-row pile.5. A new computing method, that is the improved method, has been put forward and programmed for the...
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