Deformed Displacement Pile for Vertical Support
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Solution Overview
Problem
Conventional piles face challenges in providing sufficient vertical support due to soil loosening during the rotary installation process, which reduces the pile's ability to resist vertical loads effectively.
Innovation Solution
The development of a deformed displacement pile with features such as threads, projections, or indentations on its outer surface, combined with a deformation structure that creates a spiral groove in the annulus, enhances the gripping interface with grout and prevents shearing, thereby improving vertical support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary installation process is used to install the pile, then the pile can be rapidly deployed, but the soil is loosened which reduces the vertical support capability
Solution Approach 1:
The pile is divided into multiple sections that can be installed separately and then connected. This allows the pile to be rapidly installed using rotary equipment while maintaining the ability to provide reliable vertical support through the segmented structure with deformation features at each section interface
Solution Approach 2:
Deformation structures are pre-formed on the pile surface before installation. These pre-formed deformations create gripping interfaces with the surrounding soil and grout, ensuring vertical support capability is established before the pile is fully installed and loaded
2Reliability
If grout is injected around the pile to solidify the volume, then vertical support is improved, but the grout may slip between the grout and the pile without sufficient gripping interface
Solution Approach 1:
Deformation structures are created at specific locations on the pile surface, particularly at section interfaces, to provide localized gripping zones. These local deformations create mechanical interlocking with the grout, preventing slippage at critical locations while maintaining overall pile integrity
Solution Approach 2:
The deformation structures create curved or non-planar surfaces on the otherwise cylindrical pile. These curved deformation features increase the surface area and create mechanical interlocking with the grout, enhancing the bonding strength and preventing slippage between the grout and pile
3Ease of manufacture
If a smooth cylindrical pile surface is used, then manufacturing is simple, but the pile provides insufficient gripping contact with the grout
Solution Approach 1:
Instead of making the entire pile surface complex, deformation structures are applied partially at specific locations such as section interfaces. This partial application maintains relative manufacturing simplicity while providing sufficient gripping contact where it is most needed for vertical support
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 proposed solution effectively enhances the vertical support of piles by creating a strong gripping interface with grout and preventing shearing, thus addressing the limitations of conventional piles.
Implementation Method 1
The deformation in the wall of the annulus or bore assists in preventing shearing between the grout and the soil (medium)
Implementation Method 2
a deformation structure that cuts into or gouges the wall of the annulus or bore created by the displacement head, so as to create a deformation in the wall of the annulus or bore
Data Source
AI summary
A bi-directional swing pile adapter includes a first ring; a first support arm; a second support arm; a first swivel connector to operatively connect the first ring to the first support arm in a swivel manner; a second swivel connector to operatively connect the first ring to the second support arm in a swivel manner; a pile coupling member to enable coupling to a pile; a third swivel connector to operatively connect the first ring to the pile coupling member in a swivel manner; and a fourth swivel connector to operatively connect the first ring to the pile coupling member in a swivel manner.