Expansive Grouting for Real-Time Foundation Soil Stabilization
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Solution Overview
Problem
Conventional methods fail to adequately address the insufficient bearing capacity of foundation soils, leading to potential settling and failure of buildings, as they primarily focus on surface soil treatment without addressing underlying issues, and post-construction interventions are complex and expensive.
Innovation Solution
A method involving the injection of an expandable substance, such as a polymer or chemically expanding multicomponent material, into the soil through strategically placed holes, allowing real-time monitoring and adjustment to enhance bearing capacity by compacting and consolidating the soil, focusing on areas of least resistance to create a stable foundation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional methods (piles, micropiles) are used to transfer building weight to deeper soil layers, then the bearing capacity is improved, but the complexity and cost of the solution increases significantly
Solution Approach 1:
The invention changes the physical-chemical parameters of the soil by injecting expandable grout that undergoes chemical expansion and phase change from liquid to solid state. This transforms the soil structure to increase bearing capacity without requiring complex mechanical reinforcement systems like piles.
Solution Approach 2:
The invention replaces the mechanical system of driving piles and micropiles with a chemical injection process. The expandable grout is injected through boreholes and chemically expands to consolidate the soil, eliminating the need for complex mechanical penetration and installation equipment.
2Stability of the object's composition
If surface soil treatment is applied, then the immediate surface stability is improved, but the underlying soil settling continues causing future subsidence
Solution Approach 1:
The invention extends the treatment from the surface layer to deep underground layers by injecting grout through boreholes reaching significant depths. This three-dimensional approach consolidates the soil throughout the entire foundation depth, preventing future subsidence by addressing the root cause rather than just the surface symptom.
Solution Approach 2:
The invention performs preliminary consolidation of the deep soil layers before the building is constructed or before further settlement occurs. By pre-treating the underlying soil with expandable grout, the foundation is prepared to prevent future subsidence rather than merely addressing surface-level issues.
3Strength
If post-construction intervention (injection of expandable substance) is performed, then the bearing capacity is improved, but the complexity and cost of the intervention increases
Solution Approach 1:
The expandable grout performs its own consolidation function through chemical expansion and phase change without requiring external mechanical equipment. The grout automatically expands to fill voids and consolidate soil particles, eliminating the need for complex post-construction intervention machinery while achieving the desired bearing capacity improvement.
Solution Approach 2:
The invention utilizes chemical parameter changes of the grout material - specifically its expansion ratio and phase transition from liquid to solid - to achieve soil consolidation. This chemical mechanism is simpler and more cost-effective than mechanical post-construction interventions, as it leverages the material's inherent properties rather than requiring complex equipment.
4Strength
If deep soil layers are treated, then the fundamental bearing capacity issue is addressed, but the difficulty of accessing and treating deep soil increases
Solution Approach 1:
The invention uses boreholes as intermediary access points to reach deep soil layers. Instead of requiring direct mechanical access or excavation to deep depths, the grout is injected through relatively shallow boreholes that reach the target depth, serving as a mediator to deliver the consolidation material to the deep soil without the complexity of deep excavation or drilling equipment.
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 effectively increases the bearing capacity of foundation soils, preventing further subsidence by compacting and consolidating the soil, ensuring stable support for buildings, even in challenging soil conditions, with minimal disruption and cost.
Implementation Method 1
injection of an expandable substance, such as a polymer or chemically expanding multicomponent material, into the soil
Implementation Method 2
allowing real-time monitoring and adjustment to enhance bearing capacity by compacting and consolidating the soil
Data Source
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AI summary
The present disclosure relates to a method for real-time compensation for ground movements which would otherwise adversely affect an existing built environment. Embodiments may include providing a plurality of holes in soil for the injection of a substance that expands as a consequence of a chemical reaction. The plurality of holes may be located between a source of movement and an asset to be protected. Embodiments may also include injecting, in at least one of the plurality of holes, the substance and monitoring, in real-time, at least one of movement of the soil or the asset to be protected. Real-time monitoring may occur during an activity that is causing the ground movements. Embodiments may further include obtaining real-time monitoring data, based upon, at least in part, the monitoring.