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Abstract High arch dam toe area is the focus of reinforcement design. In order to study its anchorage，anchorage mechanism of high arch dam toe，based on the deformation reinforcement theory，is farther illuminated. In this mechanism，the unbalance force of a load case is the corresponding minimal reinforcement for stability and unbalanced force direction is the optimal design of anchorage direction. Combined with this idea，the method of unbalanced force calculation and normal condition of anchorage of high arch dam toe area are presented. The mechanism is applied to numerical analysis of anchorage of Baihetan high arch dam toe，and the minimum reinforcement force and the optimal design of anchorage direction are obtained. The reasons of unbalanced force distribution law are analyzed. At the same time，geomechanical model experimental research，under large-scale (250∶1)，is carried out. From loading to failure，the displacement，strain and crack of high arch dam toe are monitored and analyzed；failure relationship between dam toe area and loading process is obtained. The experimental results and the numerical ones consistently show that left bank dam toe area of Baihetan arch dam is more vulnerable than the right ones. The research validates that deformation reinforcement theory provides scientific theoretical basis and practical analyzing method for anchorage of high arch dam toe.
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Received: 02 March 2010
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