Auger Grouted Displacement Pile Soil Compaction
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Solution Overview
Problem
Conventional pile installation methods loosen soil, reducing vertical support, and current grout deployment is uncontrolled and ineffective in solidifying the soil around piles.
Innovation Solution
The auger grouted displacement pile system uses a soil displacement head with a blade and deformation structure to compact soil laterally and a trailing edge for controlled grout delivery, enhancing soil bonding and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pile is rotated to move it downward into the soil, then the pile can be rapidly deployed without pre-drilling, but the soil is loosened which reduces vertical support
Solution Approach 1:
The pile installation process is segmented into distinct functional zones: a cutting tip for rapid penetration, a trailing edge for grout injection, and a body for structural support. This segmentation allows each zone to perform its specific function optimally without interfering with others.
Solution Approach 2:
Grout is injected through the trailing edge during the installation process itself, performing the soil solidification action preliminarily before the pile is fully installed. This eliminates the need for separate post-installation grouting operations and ensures proper grout placement during the high-productivity installation phase.
2Strength
If grout is injected around the pile to solidify the soil, then vertical support is improved, but the current uncontrolled deployment method is ineffective and causes soil packing problems
Solution Approach 1:
The trailing edge acts as an intermediary device that delivers grout precisely to the soil-pile interface. This controlled delivery mechanism replaces uncontrolled injection methods, ensuring uniform grout distribution and proper soil solidification without causing packing problems.
Solution Approach 2:
The pile structure itself serves the dual function of both structural support and grout delivery. The trailing edge is an integral part of the pile that automatically injects grout during installation, eliminating the need for separate complex grout delivery systems and ensuring precise placement.
Data Source
AI summary
A method and apparatus place an auger grouted displacement pile or helical pile in soil. The pile has an elongated shaft with at least one lateral compaction protrusion which establishes a regular circumference in the supporting medium. The pile also has a helical blade configured to move the pile into the supporting medium. The bottom of the shaft includes means for forming irregularities in the circumference after compaction by the lateral compaction protrusion. The bore is filled with grout while leaving the pile in the soil.