Self-Propelled Pile Driver with Sensor-Based Mode Switching

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Solution Overview

Problem

Existing pile-driving systems face inefficiencies due to overestimated piling rates, increased weight leading to shallower driving depths, limited soil adaptability, and manual operation safety concerns, particularly when dealing with varying soil types and increased lateral friction.

Innovation Solution

A self-propelled pile-driving device equipped with a support frame, a pile-driving assembly featuring a driving device and a vibratory device, along with pressure and motion sensors to selectively activate pressure, vibration, or combined modes based on soil conditions, and an automated pile-loading system to minimize operator intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If two driving apparatuses are placed on the same vehicle to increase piling rate, then productivity is improved, but device complexity increases and operator safety deteriorates due to manual operation requirements

Engineering Contradiction:

Improvepiling rateVSAvoidvehicle structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The vehicle is divided into two separate vehicles, each equipped with one driving apparatus. This segmentation resolves the complexity issue by distributing the driving functions across independent units, eliminating the need for complex coordination systems while maintaining the ability to perform alternating driving operations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each vehicle is equipped with automated control systems that enable autonomous operation of the driving apparatus. The vehicles can operate independently with minimal operator intervention, improving safety while maintaining productivity through coordinated alternating operations.

Inventive Principle:

Principle #25Self-service

2Force

If ballasts are added to increase counter force during vertical static driving pressure, then driving force is improved, but vehicle weight increases leading to shallower driving depths

Engineering Contradiction:

Improvecounter forceVSAvoidvehicle weight

Core Design Contradiction:

ForceVSWeight of moving object

Solution Approach 1:

The system uses alternating periodic action where one vehicle drives while the other prepares or rests. This allows each vehicle to operate at optimal weight without permanent ballasts, as the driving force is distributed over time through alternating operations rather than requiring simultaneous heavy counterforce from a single overloaded vehicle.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Instead of static ballasts that permanently increase weight, the system uses dynamic weight distribution where vehicles can adjust their operational states. The alternating driving scheme allows each vehicle to be lightweight when not driving, improving mobility and driving depth capability while maintaining sufficient force during active driving phases.

Inventive Principle:

Principle #15Dynamics

3Strength

If improved adherence piles with increased lateral surface are used to increase friction force, then pile strength is improved, but lateral friction resistance increases reducing driving depth

Engineering Contradiction:

Improvepile strengthVSAvoiddriving depth

Core Design Contradiction:

StrengthVSLength of stationary object

Solution Approach 1:

The pile driving process is segmented into alternating phases where different pile sections are driven by different vehicles at different times. This allows optimization of pile geometry for strength in sections where high friction is beneficial, while other sections can be driven deeper using alternative geometries when lateral friction is less critical.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system allows changing pile parameters such as diameter and surface geometry along the pile length and between different pile sections. By varying these parameters, the pile can achieve optimal strength where needed while reducing lateral friction resistance in sections where deeper penetration is the priority.

Inventive Principle:

Principle #35Parameter changes

4Ease of operation

If manual operation is used to operate driving devices, then ease of operation is maintained, but operator safety deteriorates

Engineering Contradiction:

Improveoperational flexibilityVSAvoidoperator safety

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The driving devices are equipped with automated control systems that perform monitoring and adjustment functions without continuous manual intervention. Operators initiate commands and supervise, while the automated systems handle dangerous operations, maintaining ease of operation through simple interface while dramatically improving safety through reduced exposure to hazardous conditions.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system incorporates sensors and control systems that continuously monitor operating parameters and provide feedback to automatically adjust driving forces and positions. This feedback mechanism maintains operational flexibility through programmable control while improving safety by eliminating manual exposure to high-force operations and enabling precise control of dangerous processes.

Inventive Principle:

Principle #23Feedback

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 device effectively adapts to different soil types, enhances driving depth by optimizing operating modes, and automates the process, reducing operator risk and increasing efficiency by continuously monitoring and adjusting parameters in real-time.

Implementation Method 1

a vibratory device (3), said driving device and said vibratory device being designed to drive a pile into the ground by applying pressure and vibrations respectively

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

a pressure sensor operatively connected to said driving assembly so as to activate said driving device and said vibratory device, selectively or in combination, depending on pressure values detected

Methodology Applied

Scientific EffectPressure sensing:

Implementation Method 3

a sensor for detecting the rate at which the pile moves forward, which are operatively connected to the driving assembly

Methodology Applied

Scientific EffectMotion detection:

Implementation Method 4

a driving device and a vibratory device, said driving device and said vibratory device being designed to drive a pile into the ground by applying pressure and vibrations respectively

Methodology Applied

Scientific EffectPressure application: Pressure Increase

Data Source

PatentEP4004293B1Device for driving piles into the ground

Publication Date: 2023.11.01 GEOSEC

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Figure 3A~3B
Figure 3C~3D

AI summary

A self-propelled pile-driving device comprises a support frame, a pile- driving assembly supported on the frame and including a driving device and a vibratory device. The driving device and the vibratory device are configured to drive a pile into the ground by applying pressure and vibrations, respectively. The device further comprises a pressure sensor and a sensor for detecting the rate at which the pile moves forward, which are operatively connected to the driving assembly so as to activate the driving device and the vibratory device, either selectively or in combination, depending on pressure values and rates of forward motion detected.