考慮溶洞頂板自重時(shí)樁端持力巖層安全厚度計(jì)算方法
[Abstract]:Through the reasonable simplification of the model of cavern roof bearing layer, the formula of anti-punching and shearing thickness of cavern roof bearing layer, which has been studied in the paper, is further improved, and the influence factors of self-weight are considered. A formula for the thickness of the bearing layer of a unidirectional plate and a bidirectional plate which can take into account the factors such as effective width and deadweight is put forward. The mechanical concept of the formula is clear and the calculation is simple. Combined with the range of various parameters in engineering practice, according to the conventional anti-punching, shearing and tensile bending failure modes, it is concluded that under general conditions, the anti-punching shear of the roof of the cavern bearing layer is obtained. The net shear thickness of the pile is more than 2.5 and the total thickness of the tensile bending failure roof is more than 5.5 times of the pile diameter, which can meet the design requirements. The research can be used as a reference for the design and construction of bridge pile foundation in karst area.
【作者單位】: 中鐵第四勘察設(shè)計(jì)院集團(tuán)有限公司;
【分類號(hào)】:TU473.1
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