Sheet Piling Basement Construction with Interior Anchors
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Solution Overview
Problem
Conventional methods for constructing basements and underground parking garages require substantial completion of below-ground construction before above-ground construction can begin, leading to delays and increased costs, and often necessitate exterior supports or anchors that complicate site access and neighbor permissions.
Innovation Solution
A method using sheet piling sections to form walls around the construction site, allowing for simultaneous above-ground and below-ground construction by installing sheet piling sections to enclose areas, excavating chambers, and forming floors and ceilings in a top-down or hybrid construction approach that eliminates the need for exterior supports and anchors, enabling flexible site access and reduced construction time and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional concrete foundation methods are used, then the foundation walls can be constructed, but the construction time increases and above-ground construction cannot begin until below-ground construction is completed
Solution Approach 1:
The sheet piling wall is installed in advance to enclose the excavation area before any concrete pouring or above-ground construction begins. This preliminary enclosure enables subsequent excavation and foundation work to proceed independently and simultaneously with above-ground construction, eliminating the sequential dependency that delays overall project completion.
2Strength
If sheet piling walls are constructed with exterior anchors, then the walls can be supported, but the property owner must build further from the property line or obtain permission from adjoining land owners
Solution Approach 1:
Instead of anchoring the sheet piling wall from the exterior side, the invention inverts the support approach by anchoring from the interior side. Floor supports are attached to the interior surface of the sheet piling wall, and anchors extend from these interior supports into the foundation structure, eliminating the need for exterior anchors that would encroach on adjacent property.
3Stability of the object's composition
If exterior anchors are installed on the sheet piling wall, then the wall can be anchored in position, but the construction complexity and cost increase due to additional forms and concrete
Solution Approach 1:
The invention extracts and eliminates the need for separate exterior anchor systems, additional forms, and extra concrete pouring. By integrating the anchoring function into interior floor supports that attach directly to the sheet piling wall, the system simplifies the construction process while maintaining wall stability.
4Ease of manufacture
If conventional excavation methods are used, then the foundation can be constructed, but above-ground and below-ground construction must be done sequentially, increasing overall project duration
Solution Approach 1:
The construction process is segmented into independent parallel tracks: below-ground work (sheet piling installation, excavation, foundation construction) and above-ground work (structural steel erection, building construction). The sheet piling wall serves as the dividing element that enables this segmentation, allowing both construction phases to proceed simultaneously without interference.
Data Source
AI summary
A method of construction using sheet piling sections that includes the steps of: (a) installing a sheet piling wall in the ground to enclose a first area and a second area; (b) excavating a plurality of holes in the first area; (c) excavating the second area; (d) installing a plurality of first area structural supports; (e) leveling the first area; (f) forming a first floor in the first area; (g) excavating the first area to form a first area chamber; (h) leveling the bottom surface of the first area chamber; (i) forming a first area chamber floor; (j) repeating steps (g) through (i); (k) installing a plurality of second area structural supports; (l) forming a bottom floor in the excavated second area; (m) forming a ceiling above the bottom floor to form a second area chamber; and (n) repeating step (m) until a plurality of second area chambers are formed.