Jet Anchor High-Pressure Grouting Root Zone Strength
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Solution Overview
Problem
Conventional anchor systems used in geotechnical engineering often result in time, cost, and labor losses due to the formation of very long root zones, inadequate strength, and potential for collapse, especially in heterogeneous soils, leading to safety and structural integrity issues in deep excavations and underground structures.
Innovation Solution
The jet anchor system employs a high-pressure jet grouting method with a combination of an anchor body, ducted cutting wings, rope pulling apparatus, guide pipe, and wing opening plate to create a composite structure with increased strength, allowing for efficient root zone formation and stabilization by forming a composite structure through high-pressure jet injection and using a minimal number of anchors and root zone length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional low-pressure cement-water injection is used to form the root zone, then the injection process is simple, but the root zone strength is insufficient and very long root zone length is required
Solution Approach 1:
The patent applies high-pressure jet injection (350-500 bar) instead of conventional low-pressure injection, fundamentally changing the pressure parameter to create a composite soil-concrete structure with significantly increased strength and reduced required length
Solution Approach 2:
The patent creates a composite root zone structure by injecting cement-water mixture at high pressure into the soil, forming a soil-concrete composite that combines the advantages of both materials to achieve high strength in a compact zone
2Reliability
If very long root zone is formed to compensate for insufficient strength, then the anchorage can be made, but time, cost and labor losses increase
Solution Approach 1:
By changing the injection pressure parameter to high pressure (350-500 bar), the patent achieves rapid formation of a short but extremely strong root zone, dramatically reducing construction time while maintaining high reliability
Solution Approach 2:
The patent performs preliminary soil improvement through high-pressure jet injection before anchor installation, creating an optimized root zone in advance that enables faster subsequent anchoring operations
3Ease of manufacture
If conventional anchorage systems are used in heterogeneous soils, then the installation is straightforward, but collapse risks increase due to inadequate strength and design deficiencies
Solution Approach 1:
The patent creates a composite soil-concrete root zone that provides enhanced strength and stability in heterogeneous soils, forming a unified structure that resists collapse while maintaining practical installability
Solution Approach 2:
The patent applies high-pressure jet injection locally at the anchor location to create a concentrated zone of high-strength composite material, providing localized reinforcement where it is most needed for structural stability
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 solution provides high-strength, reliable retaining walls and reduces the risk of structural failures by enhancing the load-bearing capacity and stability of excavation surfaces, ensuring safer geotechnical structures even in overload conditions.
Implementation Method 1
the cement-water mixture is ejected into the floor through the nozzles at high pressure (350-500 bar). Therefore, the soil-concrete mixture constitutes composite structure.
Implementation Method 2
The root zone strength is determined by the friction resistance between this injection and the ground
Data Source
AI summary
The invention relates to a jet anchor which ensures the fixation of the lateral support elements on the surface to mass formed by high pressure jet injection with purpose of providing stabilization of the excavation surface during excavation support and slope stability works, said jet anchor provides the combined usage of anchor body (120), ducted cutting wing (140), connectors, rigid wing opening plate (130), rope pulling apparatus (110), guide pipe elements (150) with new anchor equipment and jet grouting system and thus obtaining strength increased anchor element.