Ground Improvement Body with Variable-Depth Lattice for Settlement Control
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Solution Overview
Problem
Conventional ground improvement bodies with lattice-shaped structures face challenges in further reducing settlement and improved volume, as they apply primary improved depth and width uniformly across the foundation, leading to imbalanced ground contact pressure and increased construction costs.
Innovation Solution
A ground improvement body design featuring a horizontal plate-shaped upper body and a lattice-shaped lower body with varying depths and widths, including outer periphery, intermediate, and central improvement bodies, where depths and widths are progressively increased or reduced to balance ground contact pressure, thereby reducing absolute and relative settlement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform depth and width are applied to the entire ground improvement body, then construction is simplified, but ground contact pressure becomes imbalanced and settlement cannot be sufficiently reduced
Solution Approach 1:
The patent applies different depths and widths to different regions of the ground improvement body. Specifically, the improvement body has a greater depth and width at the center portion compared to the peripheral portions, creating local variations in geometry that correspond to the non-uniform load distribution. This allows the ground contact pressure to be balanced across different regions, with the center portion providing additional support where column axial forces are highest.
2Volume of stationary object
If the improved volume is reduced, then construction costs decrease, but settlement control becomes insufficient
Solution Approach 1:
The improvement body is designed with non-uniform dimensions where the center portion has greater depth and width while peripheral portions have reduced dimensions. This localized concentration of improvement volume in the center region, where column axial forces are highest, allows for effective settlement control while minimizing the total improved volume compared to a uniform design.
Solution Approach 2:
The patent varies the geometric parameters (depth and width) of the improvement body across different regions. By changing these parameters locally rather than maintaining uniform values throughout, the design achieves optimal settlement control with reduced total volume, as the enhanced dimensions are concentrated only where needed to counteract the non-uniform load distribution.
3Reliability
If the improvement body dimensions are increased, then settlement is better controlled, but construction costs and improved volume increase
Solution Approach 1:
Rather than uniformly increasing dimensions throughout the entire improvement body, the patent applies increased depth and width only to the center portion where column axial forces are highest. This localized approach provides effective settlement control at the critical region while avoiding unnecessary volume increase in peripheral areas where loads are lighter.
Data Source
AI summary
A ground improvement body includes a horizontal plate-shaped upper improvement body and a lattice-shaped lower improvement body. The depth of the lower improvement body is gradually increased from an outer peripheral part of the ground improvement body toward a center part of the ground improvement body. Thus, ground contact pressure of the ground improvement body is balanced between its outer peripheral part and center part.