Jetting and Grouting Pile System for Low-Vibration Foundation Installation
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Solution Overview
Problem
Conventional deep foundation systems face issues such as noise and vibration during installation, potential damage to piles, and reduced load-carrying capacity due to soil loosening, while cast-in-place systems struggle with maintaining geometric properties and verifying load-carrying capacity post-installation.
Innovation Solution
A pile system that uses a pile member with jet conduits and grout conduits, employing pressurized fluids to create openings and secure the pile in the substrate, incorporating adjustable nozzles and semi-permeable grout membranes for controlled grouting and load transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high pressure water jetting is used to insert prefabricated piles, then noise and vibration are reduced, but soil loosening occurs which substantially reduces the pile's load-carrying capacity
Solution Approach 1:
The patent introduces grout as an intermediary material that fills the voids and loosened soil around the pile created by jetting. The grout acts as a bonding agent between the pile and surrounding soil, restoring and enhancing the load-carrying capacity that was lost due to soil loosening during the low-noise jetting installation process.
Solution Approach 2:
The patent changes the physical state and properties of the soil-pile interface by injecting grout that hardens to form a rigid bond. This transforms the loose, low-strength soil structure created by jetting into a consolidated, high-strength grouted mass that can effectively transfer and sustain pile loads.
2Strength
If conventional driven pile systems are used, then load-carrying capacity is improved, but substantial noise and ground vibration are generated that must be carefully monitored
Solution Approach 1:
The patent replaces the high-impact mechanical driving system with a low-impact jetting and grouting system. Instead of using hammer impact forces to install the pile, the system uses pressurized water jetting to create the hole and grout injection to secure the pile, thereby eliminating the harmful noise and vibration associated with conventional driven pile installation while maintaining load-carrying capacity through the grouted soil-pile composite structure.
3Object-affected harmful factors
If cast-in-place concrete systems are used, then potential damage to surrounding appurtenances is limited and operation is quiet, but the foundation may fail to retain its geometric properties because surrounding soil may fall away from the sidewalls
Solution Approach 1:
The patent performs preliminary jetting to create a precisely defined hole with clean, stable sidewalls before inserting the prefabricated pile. This preliminary action of jetting and immediate pile insertion prevents soil from falling away from the sidewalls, thereby maintaining the geometric properties and uniform diameter of the foundation member while still operating quietly and without damage to surrounding appurtenances.
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 system reduces noise and vibration, minimizes pile damage, and enhances load-carrying capacity by ensuring precise grouting and secure pile placement, offering improved confidence in the foundation's design load-carrying capacity.
Implementation Method 1
conveying a first fluid outwardly from the one or more tip nozzles so as to define an elongate opening in a substrate
Implementation Method 2
a grout membrane encapsulating at least a portion of the pile member... conveying a second fluid... so as to substantially secure the pile member in the elongate opening
Implementation Method 3
conveying a second fluid outwardly from the one or more outlets so as to substantially secure the pile member in the elongate opening
Data Source
AI summary
Systems and methods are provided for establishing and securing a foundation in a substrate. For example, in one embodiment, a pump conveys a first fluid (e.g., water) through a pile member to produce an elongate opening in a substrate, which allows the pile member to be advanced into the substrate. After the pile member has been advanced into the elongate opening in the substrate, a second fluid (e.g., fluidized concrete) is conveyed out of openings on the side (and the bottom) of the pile member to substantially secure the pile member in the elongate opening defined in the substrate.