Abstract
In addition to the vibration loads caused by offshore structure construction, the offshore foundation pit can also be affected by additional hydraulic loads such as waves, tides, and typhoons, hindering our understanding of the mechanical performance of the foundation pit supporting structure. In order to illuminate this mechanical performance under waves, tides, hammering, and unbalanced loads, this paper analyzed the supporting structure with theoretical and numerical simulations. The results were verified with field monitoring data. Moreover, the influences of loads, including construction vibration loads and unbalanced loads, on structure and soil were discussed. By applying these results to the engineering design, this research could provide a reference for studying mechanical properties of relevant supporting structures and the construction of offshore foundation pits.
Highlights
An increasing number of cross-sea tunnels, bridges [1], large-scale wharves, offshore wind turbine structures [2,3,4,5,6], and other major projects have been constructed near seashores, indicating the necessity of more offshore foundation pits
There may be other offshore structures nearby or around the offshore foundation pit, imposing additional vibration loads. Considering these unfavorable factors, a study of the specific influence of additional hydraulic and construction vibration loads on structure and soil may help improve the engineering technology of foundation pit support by referring to relevant engineering problems and scientific issues. erefore, it is of engineering and scientific significance to study the supporting technology of soft soil foundation pits in coastal areas under adverse conditions such as waves, tidal forces, vibration loads, and extreme weather
Li et al [10] used MATLAB to determine the spatiotemporal evolution of the deep foundation pit seepage field and the coastal seepage field evolution model and analyzed the influence of seepage field on the foundation pit supporting structure in the excavation process through numerical simulations
Summary
An increasing number of cross-sea tunnels, bridges [1], large-scale wharves, offshore wind turbine structures [2,3,4,5,6], and other major projects have been constructed near seashores, indicating the necessity of more offshore foundation pits. There may be other offshore structures nearby or around the offshore foundation pit, imposing additional vibration loads. Considering these unfavorable factors, a study of the specific influence of additional hydraulic and construction vibration loads on structure and soil may help improve the engineering technology of foundation pit support by referring to relevant engineering problems and scientific issues. Erefore, it is of engineering and scientific significance to study the supporting technology of soft soil foundation pits in coastal areas under adverse conditions such as waves, tidal forces, vibration loads, and extreme weather. Yang et al [12] studied the design and construction of the linked piles in deep foundation pits in a coastal area of Fujian Province, which provided a valuable reference
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