Underwater Concrete Block Assembly Without Waterproof Membranes
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Solution Overview
Problem
Existing underwater concrete block construction methods, such as the large caisson method, are costly and face constraints due to the need for transporting and installing large structures, and existing techniques require waterproof membranes for structural integrity.
Innovation Solution
A method of constructing underwater concrete blocks using a column rebar assembly for firm coupling without a waterproof membrane, involving steps like first and second concrete block fabrication, guide pole installation, drainage, and concrete column formation, allowing on-site coupling and integration of concrete blocks and columns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large caisson method is used to construct underwater structures, then the structure can withstand big waves, but the transportation and construction costs are high and there are various constraints
Solution Approach 1:
The invention divides the large caisson structure into multiple small concrete blocks that can be manufactured separately on land and then assembled underwater. Each block contains a column rebar assembly that protrudes from the top surface, enabling straightforward coupling with adjacent blocks. This segmentation approach maintains the structural strength needed to withstand waves while dramatically simplifying transportation and construction logistics.
2Device complexity
If small concrete blocks are stacked in multiple layers to solve transportation constraints, then construction flexibility improves, but structural stability in typhoon waves becomes insufficient
Solution Approach 1:
The invention merges the column rebar assembly with the concrete block body into an integrated structure. The rebar assembly extends vertically from within the block and protrudes from the top surface, creating a unified coupling mechanism. This merging ensures that when blocks are stacked in multiple layers, the rebar assemblies interlock to form a structurally stable assembly capable of withstanding typhoon waves while maintaining construction flexibility.
3Reliability
If a waterproof membrane is used to form concrete columns in stacked blocks, then structural integrity is achieved, but construction costs and time increase
Solution Approach 1:
The invention extracts and eliminates the waterproof membrane from the construction process. Instead of forming concrete columns within waterproof membranes, the design uses the column rebar assembly that protrudes from each block's top surface to directly couple blocks together. The rebar assembly itself serves as both the structural reinforcement and the coupling mechanism, removing the need for separate waterproof membrane installation and thereby reducing construction time and costs while maintaining structural integrity.
Data Source
AI summary
A constructing method of an underwater concrete block structure, includes: a first concrete block fabrication step, a guide pole installation step, a first concrete block installation step, a second concrete block fabrication step, a second concrete block installation step, a drainage step, a guide pole removal step, and a concrete column formation step. A concrete column and a first concrete block is firmly coupled to each other via a column rebar assembly.