Self-Stabilizing Drive Point for Tubular Piles
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Solution Overview
Problem
The existing drive points for tubular driven piles require manual holding during mounting, posing safety risks due to the weight and length of the piles, and conventional methods for shaft-grouted pile foundations often weaken the pile structure by requiring openings for concrete injection.
Innovation Solution
A drive point with support devices on its outer surface that allows it to stand stably on the ground, eliminating the need for manual holding, and incorporates concrete outlet passages within the drive point to facilitate pressure grouting without weakening the pile, using a conically shaped design with radially projecting support ribs and centering devices for secure fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual holding of drive point during mounting is used, then the drive point can be positioned correctly, but worker safety is compromised due to the weight and length of the piles
Solution Approach 1:
The drive point is designed with support devices (feet or ribs) that allow it to stand autonomously on the ground during the mounting operation. The support devices have ground surfaces that contact the ground, providing stable support without requiring manual holding by workers, thus eliminating the safety hazard while maintaining positioning capability
Solution Approach 2:
The support devices extend radially outward from the outer surface of the drive point in a direction perpendicular to the driving-in direction, creating a new spatial dimension for stability. This radial extension allows the drive point to distribute its weight and achieve stable positioning on the ground without manual support
2Adaptability or versatility
If openings are made in driven piles for concrete injection, then shaft-grouted pile foundations can be created, but the structural integrity of the piles is weakened
Solution Approach 1:
The drive point serves as an intermediary structure that provides concrete outlet passages for injecting concrete into the annular space between the drive point and the driven pile. This allows the grouting function to be achieved without creating openings in the driven pile itself, thereby maintaining the pile's structural integrity while enabling shaft-grouted foundation capability
Solution Approach 2:
The concrete outlet passages are integrated into the drive point structure, separating the grouting function from the driven pile. The drive point acts as a distinct component with dedicated pathways for concrete injection, allowing the driven pile to remain intact while still enabling the shaft-grouted foundation process
Data Source
AI summary
A drive point for a substantially tubular driven pile, wherein the drive point can be fitted onto a pile end of the driven pile, wherein at least one first support limb with a first support surface configured to abut an end face of the pile end of the driven pile is arranged at an inside wall of the drive point, wherein at least one support device with a ground surface is arranged at an outer surface of the drive point, and wherein the ground surface of the at least one support device supports the drive point when on a ground into which the drive point is to be driven in a driving-in direction.