Solutions
Four solutions are summarized for different scenarios: defect treatment of hydropower engineering, defect treatment of high-speed rail transit engineering, defect treatment of water resource environment engineering, and defect treatment of new energy power generation engineering
Leakage control of excavation pits in underground projects of rail transit stations
- Project Background:
In urban rail transit engineering, station and turning yard projects often involve excavation work. Due to the objective factors of urban space, existing buildings often surround the excavation site. During the excavation of underground engineering pits, slightly pressurized water may seep outward along the joints of the diaphragm walls, forming leakage channels in the weak soil areas below the working shaft, resulting in large-scale, high-velocity concentrated leakage that poses a significant threat to the safety of surrounding buildings.
- Emergency grouting scheme:
This type of leakage is characterized by its "danger," "urgency," and "difficulty." A rapid-response, oil-soluble polyurethane grouting material should be used for emergency grouting and leak plugging. During construction, the oil-soluble polyurethane grouting material is injected into the slightly pressurized water-soil layer through the grouting hole. Upon contact with water, it rapidly foams, with a high expansion rate, quickly sealing the leakage channel and preventing the outflow of water, sand, etc., thus achieving emergency plugging and leak prevention.
- Material Selection:
9105 emergency oil-soluble polyurethane grouting material;
Material System Selection:
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