When excavating basements or tunneling in areas with high groundwater levels and soil that allows water to pass through easily, water inflow and ground collapse are likely risks. In these situations, stopping water inflows with grouting becomes a critical and urgent task, requiring quick response, advanced construction methods, and the ability to stay calm under pressure.
High Quality Construction Team
In construction, significant water inflows and soil collapse are common challenges, especially in basement excavation, wellhead sealing, and tunnel excavation.
For basement excavation, water inflows often occur during soil retention work, such as diaphragm walls, soldier piles, or retaining columns. Issues like fractured walls, large pile gaps, high external water levels, and permeable soils increase the risk. When retaining columns are used, gravel or sandy silt may enter construction joints during concrete pouring. As water levels rise, pressure forces water through these joints, entering the basement.
Wellhead sealing is often overlooked but can lead to water and sand inflows. The well frame is welded to the dewatering pump at the foundation slab’s mid-thickness. Once the building’s weight exceeds buoyancy and the pump is removed, water may surge up. The wellhead cover is bolted shut, but pressure beneath a large 70 x 70 cm cavity (2m deep) pushes upward. Since only half the slab’s thickness supports this area, failure is likely over time. To ensure stability, grouting and sealing the cavity disperses water pressure away from the steel plate.
For tunnels, water inflows often occur at the interface between the tunnel and diaphragm wall during shield tunneling, requiring immediate action to prevent collapse. In mountain tunnels, fault zones pose the highest risk. If pre-drilling detects aquifers or minor inflows, rapid grouting and consolidation are needed to prevent disasters.
In construction, significant water inflows and soil collapse are common challenges, especially in basement excavation, wellhead sealing, and tunnel excavation.
For basement excavation, water inflows often occur during soil retention work, such as diaphragm walls, soldier piles, or retaining columns. Issues like fractured walls, large pile gaps, high external water levels, and permeable soils increase the risk. When retaining columns are used, gravel or sandy silt may enter construction joints during concrete pouring. As water levels rise, pressure forces water through these joints, entering the basement.
Wellhead sealing is often overlooked but can lead to water and sand inflows. The well frame is welded to the dewatering pump at the foundation slab’s mid-thickness. Once the building’s weight exceeds buoyancy and the pump is removed, water may surge up. The wellhead cover is bolted shut, but pressure beneath a large 70 x 70 cm cavity (2m deep) pushes upward. Since only half the slab’s thickness supports this area, failure is likely over time. To ensure stability, grouting and sealing the cavity disperses water pressure away from the steel plate.
For tunnels, water inflows often occur at the interface between the tunnel and diaphragm wall during shield tunneling, requiring immediate action to prevent collapse. In mountain tunnels, fault zones pose the highest risk. If pre-drilling detects aquifers or minor inflows, rapid grouting and consolidation are needed to prevent disasters.
1. Hydrodur HD-300 is a two-component, chemically reactive polyurethane used for water-stopping and consolidation grouting. Its gelation and curing times are adjustable, providing strength and water resistance, making it ideal for sealing water inflows.
2. Hydrodur HD-200 is a two-component, low-viscosity silicone-based grouting material specifically designed for sandy or highly permeable soil conditions. It serves as a permeation grouting material for water-stopping and soil consolidation.
1. Solvent-free and contains no filler resins.
2. Reaction, gelation, and curing times can be adjusted.
3. High compressive strength for consolidation.
4. Stops water inflow and prevents gas permeability.
5. Foaming ratio ranges from 0.15 to 20 times.
1. Hydrodur HD-300 is a two-component, chemically reactive polyurethane used for water-stopping and consolidation grouting. Its gelation and curing times are adjustable, providing strength and water resistance, making it ideal for sealing water inflows.
2. Hydrodur HD-200 is a two-component, low-viscosity silicone-based grouting material specifically designed for sandy or highly permeable soil conditions. It serves as a permeation grouting material for water-stopping and soil consolidation.
1. Solvent-free and contains no filler resins.
2. Reaction, gelation, and curing times can be adjusted.
3. High compressive strength for consolidation.
4. Stops water inflow and prevents gas permeability.
5. Foaming ratio ranges from 0.15 to 20 times.
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