Multilayered Steel Pipe Pile Tsunami Breakwater Wall
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tsunami breakwater structures lack sufficient quake resistance and tsunami resistance, especially in areas with existing facilities like power plants and seaports, where space is limited and interference with operations is a concern.
Innovation Solution
A multilayered steel pipe pile structure with large diameter steel pipe piles of different diameters embedded to a predetermined depth and protruding above ground, integrated with a reinforced concrete wall body, allowing for efficient transfer of horizontal forces and reduced weight through hollow sections, enabling effective quake and tsunami resistance without disrupting existing facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional breakwater structures are used, then wave dissipation capability is improved, but quake resistance and tsunami resistance are insufficient
Solution Approach 1:
The invention uses composite materials by combining steel pipe piles with concrete infill and concrete copings. The steel pipe piles provide ductility and seismic resistance, while the concrete infill and copings provide mass for wave dissipation. This composite structure resolves the contradiction by achieving both quake/tsunami resistance and wave dissipation capability simultaneously.
Solution Approach 2:
The invention applies nesting by placing concrete infill inside the steel pipe piles and positioning concrete copings on top of the steel pipe piles. This nested configuration allows the inner concrete infill to contribute to mass and wave dissipation while the outer steel structure provides seismic ductility, achieving both reliability requirements.
2Reliability
If large diameter steel pipe piles are used to enhance quake and tsunami resistance, then force transfer capability is improved, but construction space requirements increase
Solution Approach 1:
The invention segments the breakwater structure into multiple steel pipe piles arranged in a row rather than using a single large structure. Each pipe pile can be of moderate diameter, reducing individual construction space requirements, while the collective array provides sufficient force transfer capability. The segmentation allows distributed loading and maintains reliability without requiring excessive area.
3Strength
If steel pipe piles with concrete infill are used, then structural strength is improved, but weight increases
Solution Approach 1:
The invention applies local quality by providing concrete infill only within the steel pipe piles where it is most needed for structural strength and wave dissipation, rather than making the entire structure uniformly heavy. The steel pipe sections without infill maintain sufficient strength while reducing overall weight. This localized approach optimizes the strength-to-weight ratio.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The multilayered steel pipe pile structure enhances quake and tsunami resistance by transferring forces to a support layer, while minimizing construction space and interference with existing facilities, effectively protecting against severe seismic and tsunami events.
Implementation Method 1
horizontal force applied to the gravity-type levee is transferred to the artificial ground by friction
Implementation Method 2
transferring forces to a support layer
Data Source
AI summary
A tsunami breakwater wall of a multilayered steel pipe pile structure 1, includes a multilayered steel pipe pile 2 where a bottom end thereof reaches a predetermined depth of a support layer 28 and is installed to a ground 26 such that an upper end thereof protrudes upward from a ground surface 26a, and a wall body 15 constructed integral with a part of the multilayered steel pipe pile 2 that protrudes upward from the ground surface 26a. The multilayered steel pipe pile 2 is made from a plurality of large diameter steel pipe piles 3-5 of different diameters, an upper end of an inner most side steel pipe pile 3 protrudes upward from the ground surface 26a, and the wall body 15 is constructed to a part of the steel pipe pile 3 protruding upward from the ground surface 26a.