Vibratory Hammer Accumulated Impact Force Calculation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the vibratory hammer construction method, determining the depth of the bearing stratum for each pile is challenging due to varying depths at different buried positions, and there is no accurate index to substitute for the N-value, making it difficult to calculate the depth of the bearing stratum with high accuracy.
Innovation Solution
A system comprising a device that acquires information on eccentricity force, number of impacts, and penetration depth from a vibratory hammer construction machine, calculates an accumulated impact force using these parameters, and displays the result to determine the work load and depth of the bearing stratum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard penetration test is performed for each buried pile to determine bearing stratum depth, then measurement precision is improved, but device complexity and time consumption increase
Solution Approach 1:
The patent replaces the mechanical standard penetration test system with a computational system that uses vibration hammer construction data (eccentricity force, number of impacts, penetration depth) to calculate an accumulated impact force index. This index serves as a substitute for the N-value obtained from standard penetration tests, eliminating the need for separate mechanical testing equipment while achieving comparable measurement precision for bearing stratum depth determination.
Solution Approach 2:
The patent creates a computational model that copies the functional purpose of the standard penetration test N-value through a different measurement approach. By calculating the accumulated impact force from vibration hammer parameters, the system produces an equivalent index that indicates bearing stratum depth without requiring actual penetration testing, thus simplifying the overall system while maintaining measurement accuracy.
2Measurement precision
If standard penetration test is performed for each buried pile, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent merges the bearing stratum detection function into the vibration hammer construction process itself. By simultaneously collecting data on eccentricity force, number of impacts, and penetration depth during normal construction operations, the system calculates the accumulated impact force index without requiring separate time-consuming penetration tests. This integration eliminates the need for sequential testing while maintaining measurement precision.
Solution Approach 2:
The patent performs the bearing stratum detection action during the preliminary construction phase. As the vibration hammer penetrates the ground during normal pile installation, the system continuously monitors and calculates the accumulated impact force index, identifying the bearing stratum depth before the construction is completed. This eliminates the need for post-construction testing and reduces overall time loss.
3Productivity
If vibration hammer construction method is used without accurate index, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the vibration hammer construction data (eccentricity force, number of impacts, penetration depth) is continuously monitored and used to calculate the accumulated impact force index in real-time. This feedback loop provides continuous measurement precision for bearing stratum depth determination while maintaining the high productivity of the vibration hammer method, as no separate testing steps are required.
Solution Approach 2:
The patent changes the measurement parameters from traditional penetration test variables (N-value from mechanical impacts) to vibration hammer parameters (accumulated impact force calculated from eccentricity force, number of impacts, and penetration depth). This parameter transformation enables the system to maintain measurement precision for bearing stratum depth while utilizing the more productive vibration hammer construction method.
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
This system allows for accurate determination of the bearing stratum depth without the need for standard penetration tests, providing a reliable index for construction assistance information in real-time, enabling precise construction planning.
Implementation Method 1
information, which contains at least values indicating a eccentricity force of a vibratory hammer which a vibratory hammer construction machine imparts to a construction object
Implementation Method 2
a calculation unit configured to calculate an accumulated impact force indicating a work load of construction caused by the vibratory hammer on the basis of a ratio between a product of the eccentricity force and the number of impacts and the depth of penetration
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A device for calculating construction assistance information includes: an acquisition unit that acquires, from a vibratory hammer construction machine, information that contains at least values indicating a eccentricity force of a vibratory hammer which the vibratory hammer construction machine imparts to a construction object, the number of impacts, and a depth of penetration of the construction object; and a calculation unit that calculates a accumulated impact force indicating a work load of contruction on the basis of the information acquired by the acquisition unit.