Ground Improvement Jet Device Skewed Nozzle Arrangement
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Solution Overview
Problem
Existing methods for improving ground fail to effectively prevent large clods from remaining in the ground, leading to blockages and hindered discharge of slime, as they do not adequately cut clods that are not aligned with the flow lines of the cutting fluid jets.
Innovation Solution
The method involves using multiple nozzles positioned at an interval in a vertical direction, with cutting fluid jets injected from one nozzle in a downward skewed direction and from another in an upward skewed direction, allowing for intersecting flow lines that ensure cutting of clods regardless of their orientation, and adjusting the angle and interval of the nozzles to optimize cutting efficiency and prevent large clods from remaining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cutting fluid jets are injected horizontally from nozzles at the same vertical level, then the jet device structure is simple and easy to operate, but large clods remain unc cut in regions between parallel flow lines
Solution Approach 1:
The patent applies dimensionality change by transitioning from horizontal nozzle arrangement to vertical arrangement, and from horizontal jet injection to skewed downward injection. This spatial reconfiguration transforms the flow line pattern from parallel horizontal lines to intersecting skewed lines, enabling the cutting fluid to effectively cut clods at various orientations and positions within the drilling hole, thereby resolving the contradiction between structural simplicity and cutting completeness
Solution Approach 2:
The patent segments the single horizontal jet injection into multiple skewed jet streams from vertically spaced nozzles. By dividing the cutting action into multiple skewed flow lines that intersect, the system ensures comprehensive coverage of the ground material, preventing large clods from remaining unc cut between flow lines while maintaining operational simplicity
2Manufacturing precision
If nozzles are arranged vertically with skewed injection directions, then cutting effectiveness improves by eliminating unc cut clods, but device complexity increases
Solution Approach 1:
The skewed nozzle arrangement serves multiple functions simultaneously: it cuts ground material effectively, prevents clod formation, maintains structural integrity of the jet device, and ensures smooth operation. By designing nozzles that inject at skewed angles downward, the system achieves comprehensive cutting coverage without requiring complex additional components, thus resolving the contradiction between cutting completeness and device complexity
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 approach ensures that even large clods are cut, preventing blockages and allowing slime to be discharged, while also optimizing the cutting diameter and reducing waste by controlling the discharge of solidification material.
Implementation Method 1
cutting a ground by injecting a cutting fluid from jet devices
Implementation Method 2
mixing a cut ground, the cutting fluid and the solidification material to form an underground consolidated body
Data Source
Figure 1~2
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Figure 5~6
AI summary
The present invention provides a method for improving ground capable of preventing a clod whose representative size is large from remaining in the ground. The present invention was accomplished by a method for improving ground comprising the steps of: cutting a ground by injecting a cutting fluid (e.g. high-pressure water or high-pressure air: including a case where a solidification material is injected) from jet devices (1, 10); feeding a solidification material; mixing a cut ground (G), the cutting fluid and the solidification material; and agitating a mixture thereof to form an underground consolidated body, wherein a plurality of nozzles (N1, N2) are located at an interval in a vertical direction in the jet devices (1, 10), and when the cutting fluid is injected, a cutting fluid (jet J1) is injected from an upward nozzle (N1) in a downward skewed direction, and a cutting fluid (jet J2) is injected from a downward nozzle (N2) in an upward skewed direction.