Segmented Structural Caps with Composite Sleeves for Micropile Foundations
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Solution Overview
Problem
Geotechnical construction companies face challenges in efficiently and cost-effectively installing structures at remote and inaccessible sites due to limitations in existing techniques, which often require more materials and larger tools than necessary.
Innovation Solution
The use of a rotating drill assembly with detachable components that can be assembled on-site, combined with custom pile designs based on geotechnical characteristics and structural caps that require less concrete, allowing for efficient installation of radial arrays of micropiles and subsequent structural elements like lattice towers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional techniques are used to install structures at remote sites, then structural integrity can be maintained, but material usage and tool size requirements increase
Solution Approach 1:
The structural cap is divided into multiple segments that can be assembled on-site. Each segment contains embedded sleeves that align with micropile locations, eliminating the need to transport and install large monolithic caps to remote sites. The segments are connected through the sleeves that interface with the micropiles, maintaining structural integrity while reducing individual component size and material usage.
2Productivity
If custom pile designs are used based on geotechnical characteristics, then installation efficiency improves, but design and implementation complexity increases
Solution Approach 1:
The micropile design incorporates local geotechnical characteristics by varying pile parameters (diameter, length, reinforcement, spacing) based on specific site conditions. The structural cap segments are customized with sleeves positioned and dimensioned according to the specific micropile layout required for each location. This localized customization optimizes installation efficiency for each site while the modular segment approach keeps implementation manageable.
3Quantity of substance
If structural caps requiring less concrete are used, then material usage and curing time are reduced, but structural strength may be compromised
Solution Approach 1:
The structural cap uses a composite construction approach combining concrete segments with embedded metal sleeves and connecting elements. The sleeves act as reinforcement and load-transfer mechanisms, allowing reduced concrete volumes while maintaining structural strength. The composite system distributes loads through the concrete-matrix and metal-sleeve combination, achieving strength requirements with less concrete material and faster curing times.
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
This approach enables the efficient and cost-effective installation of structures at difficult-access sites by reducing material usage, minimizing labor, and ensuring quick curing times, while maintaining structural integrity and quality control.
Implementation Method 1
After the sleeves are disposed over the structural members, the voids of the sleeves are filled with a cementitious material that is allowed to cure, thereby fixedly coupling the structural cap to the structural members
Data Source
AI summary
The disclosure describes, in part, techniques for designing, fabricating and installing structural caps with a core and composite sleeves to be coupled to structural members of a foundation, such as an installed radial array of batter angled micropiles. These structural caps with sleeves are lightweight and, thus, more portable to difficult-access sites. Once at the sites, operators may fixedly couple these caps to the micropiles or other structural members to form a foundation for a structure to be installed at the difficult-access site.