Sealing Bed Metal Ion Binding for Excavation Stability
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Solution Overview
Problem
Existing methods for creating sealing bases in excavation pits, such as jet grouting and silicate gel injection, face challenges in achieving consistent dimensional stability and cost-effectiveness due to variable metal ion concentrations in mixing water, leading to inconsistent sealing performance and increased production costs.
Innovation Solution
Pretreating mixing water by binding metal ions using complexing agents like polyaspartates or zeolites to create a uniform injection medium with adjusted viscosity and spreading properties, reducing the need for additional safety measures and improving the yield of the sealing base material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal ions are present in the mixing water, then the injection medium can be formed, but the viscosity changes significantly leading to dimensional fluctuations in the injection body
Solution Approach 1:
The patent removes metal ions from the mixing water through pretreatment processes (such as filtration, precipitation, or ion exchange) before using the water to mix the sealing base material. This extraction of harmful metal ions prevents unwanted viscosity changes and ensures consistent dimensional stability of the injection body, directly resolving the contradiction between forming the injection medium and maintaining viscosity stability.
Solution Approach 2:
The patent introduces an intermediary substance (such as a complexing agent or chelating agent) that binds to metal ions in the mixing water, preventing them from reacting with the sealing base material. This intermediary mediator absorbs the harmful effect of metal ions while allowing the injection medium to maintain consistent viscosity and produce reliable dimensional stability.
2Ease of manufacture
If the same injection pressure is used, then the injection process is simplified, but dimensional fluctuations occur due to variable metal ion concentrations
Solution Approach 1:
The patent performs preliminary pretreatment of the mixing water to remove or bind metal ions before the injection process begins. This preliminary action ensures that when injection is performed at a constant pressure, the injection medium maintains uniform viscosity throughout, eliminating dimensional fluctuations and allowing simple injection procedures to achieve precise dimensional results.
3Adaptability or versatility
If tap water or ground water is used as mixing water, then water availability is maximized, but metal ion content varies greatly affecting sealing performance
Solution Approach 1:
The patent changes the chemical parameters of the mixing water by pretreating it to reduce metal ion content to a controlled level. This parameter change allows the use of various water sources (tap water, ground water, well water) while maintaining consistent sealing performance, as the pretreatment process standardizes the water quality regardless of its original source.
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 method ensures a reliably tight and cost-effective sealing base with reduced dimensional fluctuations, improved spreading behavior, and increased material yield, eliminating the need for excessive safety margins and rework.
Implementation Method 1
metal ions are bound from the mixing water
Implementation Method 2
complexing agents like polyaspartates or zeolites to create a uniform injection medium
Implementation Method 3
an injection medium is injected under pressure into a porous soil layer
Implementation Method 4
the injection medium being absorbed into pores in the soil area
Implementation Method 5
a gel-like structure to produce the water-impermeable layer
Implementation Method 6
metal ions lead to reactions and interactions with the ingredients of the sealing base material
Data Source
AI summary
The invention relates to a method for creating a sealing base, particularly for excavation shoring, in which an injection medium is injected into a porous soil layer. This injection medium is produced by mixing at least one sealing base material with mixing water, wherein the mixing water is pretreated before mixing and metal ions are bound in the mixing water. The invention further relates to a sealing base in which an injection medium, produced by mixing at least one sealing base material with mixing water, is injected under pressure into a porous soil layer. The mixing water is pretreated, wherein metal ions are bound in the mixing water.