Wave-dissipating and load-reducing protection device for sea-crossing bridge high pile cap foundation

Abstract

The invention discloses a wave-dissipating and load-reducing protection device for a sea-crossing bridge high pile cap foundation, which comprises an annular protection plate and a supporting part, a plurality of uniformly distributed through holes are formed in the annular protection plate, and the through hole rate of the through holes in the annular protection plate is 35%-55%; the annular protective plate is vertically and fixedly connected to the outer surface of the high pile cap, the top face of the annular protective plate is flush with the designed water level, the thickness of the annular protective plate is 1 / 8-1 / 5 of the designed wave height, and the length of the annular protective plate is 1 / 20-1 / 10 of the designed wave length; one end of the supporting component is connected with the lower surface of the ring type protection plate, and the other end of the supporting component is connected with the high pile cap. According to the invention, the perforated ring-type protective plates and the supporting parts can be utilized to obviously improve the lateral wave load of the high-rise pile cap from the three mechanisms of inhibiting the climbing of surface waves, changing the wave form and increasing the energy dissipation of the wave, a certain ship collision prevention capability is provided for the high-rise pile cap foundation of a sea-crossing bridge, and technical support is provided for sea-crossing traffic engineering.

Description

technical field [0001] The invention relates to the technical field of sea-crossing bridge engineering, in particular to a wave dissipation and load-reducing protection device for high pile cap foundations of sea-crossing bridges. Background technique [0002] Cross-sea bridges are the key nodes and throats of cross-sea transportation infrastructure projects. my country's coastline is 32,000 kilometers long, and the construction potential of cross-sea transportation projects is huge. Especially in the southeast coastal economic belt, there is a wide demand for cross-sea bridges. Compared with inland bridges, the construction environment of sea-crossing bridges is harsher, and one of the most prominent problems is wave invasion. The completed projects show that under the influence of waves, the hydrodynamic load of the bridge foundation in the marine environment is more than 10 times that of the inland river environment. For example, the Pingtan Strait Highway-Railway Bridge...

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Problems solved by technology

[0003]Most of the existing wave-absorbing and load-reducing devices face the bridge pier, but the structure of the high pile cap is significantly different from that of the bridge pier, so it is applied to the high pile cap of the cross-sea bridge Basically, the problem of wave absorption and load reduction cannot be completely solved, mainly reflected in: (1) The environment of the foundation of cross-sea bridges is complex, and the optimization of the foundation shape will significantly increase the difficulty of foundation construction, which is difficult to implement; (2) the existing The energy-dissipating chamber facility technology increases the wave-facing area of ​​the structure as a whole. Although the wave force on the structure is reduced to a certain extent, the wave load borne by the facility itself is still relatively large, and further research is needed on the wave-proof effect; (3) The size of the bearing platform is large, and the size of the required facilities is larger, and the safety is difficult to guarantee

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