Large-span arch bridge foundation

Abstract

The invention belongs to the technical field of bridge engineering and particularly relates to a large-span arch bridge foundation comprising an arch seat and a bearing layer used for supporting the arch seat. The large-span arch bridge foundation further comprises support parts. The support parts are arranged on the periphery of the bearing layer and are used for supporting the bearing layer in the transverse direction. Through the foundation structure, the transverse bearing capacity of the large-span arch bridge foundation is promoted substantially, and the size of the support parts is determined according to the magnitude of the transverse load applied to the bearing layer in actual construction. Due to arrangement of the support parts, the transverse bearing capacity of the foundationstructure is improved, then the requirement for the bearing capacity of the bearing layer is lowered so that the excavation depth of the foundation can be reduced in actual construction, constructioncost is lowered, the construction period is shortened, and the large-span arch bridge foundation can be suitable for more geological conditions. On the other hand, greater support capacity can be improved, and then the large-span arch bridge foundation can be suitable for construction of a large-span or even super-large-span arch bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a large-span arch bridge foundation. Background technique [0002] The bridge foundation is an important part of the bridge structure, which plays an important role in transmitting the self-weight and load of the bridge structure to the foundation. [0003] For arch bridges, the superstructure of the arch bridge can convert a large part of its own weight and load into internal compressive stress. Due to this characteristic, compared with bridges with other structural forms, the load transmitted to the foundation by the arch bridge is in addition to the vertical load. , there is also a large lateral load. [0004] Based on the above-mentioned structural characteristics, in the current arch bridge design, its foundation form is usually designed as an open-cut enlarged foundation or a pile group foundation. These two basic forms of both have obvious defect...

AI Technical Summary

Problems solved by technology

[0008] However, the lateral bearing capacity of the pile group foundation is small, and for small-span arch bridges, the lateral load transmitted to the foundation is small, so the pile group foundation can be considered

However, for long-span arch bridges, because the lateral load transmitted to the foundation is extremely large, for example, it can reach more than 200,000KN, so if the pile group foundation is still used, the construction cost will also increase sharply. In the case of limited budget, the group Pile foundations are clearly no longer suitable

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