Plasma Blasting for Precision Utility Mapping and Excavation
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Solution Overview
Problem
Current methods for locating and excavating underground utilities, such as high voltage electrical feeds and gas mains, face challenges due to the use of explosives which are unsafe, inefficient, and lack precision, especially in urban settings where concrete encasement complicates the process and traditional methods like jackhammers pose safety risks.
Innovation Solution
A plasma blasting system using a high voltage capacitor discharge in an incompressible fluid to generate shock waves, detected by sensors, which creates a 3D map of underground structures and allows for precise excavation by adjusting the energy and timing of the plasma blasts, enabling controlled fracture of underground structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If jackhammers are used to break concrete, then the concrete can be cleared, but safety issues arise should the jackhammer break into the conduit and contact electrical feeds
Solution Approach 1:
The patent replaces the mechanical jackhammer system with a plasma blasting system that uses electrical energy to generate controlled explosions. This substitution eliminates the risk of mechanical contact with underground utilities while maintaining concrete removal capability through controlled plasma-induced shock waves.
Solution Approach 2:
The patent introduces an intermediary detection system (electromagnetic equipment, ground-penetrating radar, or ultrasound location systems) that maps underground utility locations before excavation. This intermediary step provides precise location data that guides the plasma blasting process, ensuring concrete is removed only from areas without utilities, thereby preventing contact with electrical feeds.
2Productivity
If jackhammers are used to clear concrete, then the concrete can be removed, but the sound and vibration create unacceptable noise levels and danger for operators
Solution Approach 1:
The patent replaces the mechanical vibration-based jackhammer system with a plasma blasting system that uses controlled electrical discharges to generate shock waves. This substitution dramatically reduces mechanical vibration and noise while maintaining effective concrete removal through the plasma-induced explosive effect.
Solution Approach 2:
The patent changes the fundamental operating parameters from mechanical vibration (jackhammer) to controlled plasma energy discharge. By adjusting electrical parameters (voltage, current, pulse duration) of the plasma source, the system achieves concrete removal with controlled energy release, minimizing unwanted vibration and noise propagation.
3Productivity
If explosives are used for excavating, then excavation can be performed, but precision and safety are compromised in urban settings
Solution Approach 1:
The patent applies local quality by concentrating plasma energy discharge at specific localized points where concrete needs to be removed. The plasma blasting system can target exact coordinates based on utility location maps, removing concrete only in necessary areas while preserving surrounding structures and avoiding underground utilities with precise spatial control.
Solution Approach 2:
The patent introduces dynamic control capabilities where the plasma blasting parameters (energy level, pulse duration, frequency) can be adjusted in real-time based on feedback from detection systems and observed excavation progress. This dynamic adjustment enables precise control over the excavation process, adapting to changing conditions while maintaining safety and precision.
4Reliability
If traditional electromagnetic equipment is used to locate metal pipes and cables, then location can be detected, but pinpoint precision is insufficient to ensure proper clearance
Solution Approach 1:
The patent employs a multi-functional detection system that can identify different types of underground utilities (metal pipes, cables, plastic conduits) using multiple methods (electromagnetic detection, ground-penetrating radar, ultrasound location). This universal approach ensures pinpoint precision for all utility types by selecting the most appropriate detection method for each specific case.
Solution Approach 2:
The patent introduces an intermediary mapping system that creates detailed 3D models of underground utility networks. This intermediary digital map serves as a precise guide for the plasma blasting excavation process, providing exact coordinates, depths, and orientations of utilities to ensure proper clearance during concrete removal.
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 plasma blasting system provides precise and safe location and excavation of underground utilities, reducing vibration and noise, and is more efficient and cost-effective than traditional methods, with improved control over the blasting process and reduced environmental impact.
Implementation Method 1
a high voltage capacitor discharge in an incompressible fluid to generate shock waves
Implementation Method 2
Precision plasma blasting using techniques to map underground structures and precisely excavate these structures
Data Source
AI summary
A method, system and apparatus for plasma blasting comprises a solid object having a borehole, a blast probe comprising a high voltage electrode and a ground electrode separated by a dielectric separator, wherein the high voltage electrode and the dielectric separator constitute an adjustable probe tip, and an adjustment unit coupled to the adjustable probe tip, wherein the adjustment unit is configured to selectively extend or retract the adjustable probe tip relative to the ground electrode and a blasting media, wherein at least a portion of the high voltage electrode and the ground electrode are submerged in the blast media. The blasting media comprises water. The adjustable tip permits fine-tuning of the blast. The blast can be used to fracture solids and/or to create a shockwave to mapping underground structures.