Cement-polyurethane composite grouting process capable of blocking water fast
A composite grouting and polyurethane technology, which is applied in the shaft lining, tunnel lining, underground chamber, etc., can solve the problems of reducing the water blocking ability of polyurethane, the effect is not as good as that of alternate grouting, and the damage to the high-strength properties of cement slurry, etc., to achieve enhanced stability Non-toxic, conducive to construction and environmental protection, and improve the effect of high toxicity
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Embodiment 1
[0024] A cement-polyurethane composite grouting process for fast water blocking, comprising the following specific steps:
[0025] a. Engineering exploration: According to the fluidity of stratum fissures or dynamic water flow, several grouting holes are designed after determining the expected best reaction position of polyurethane grout. Multiple formation fractures reach one hole and multiple layers.
[0026] b. Drilling: Drill holes according to the designed drilling position to form a "group hole" structure for grouting and water blocking, and prepare for the subsequent "group hole grouting, front blocking and rear protection". In some cases, drainage holes can be arranged at appropriate positions to reduce the water gushing pressure of drilling and subsequent grouting.
[0027] c. Grouting: During grouting, polyurethane grout and cement grout are alternately injected into all boreholes at the same time, and "Y" three-way connectors are used to inject polyurethane grout a...
Embodiment 2
[0033] A cement-polyurethane composite grouting process for fast water blocking, comprising the following specific steps:
[0034] a. Engineering exploration: According to the fluidity of stratum fissures or dynamic water flow, several grouting holes are designed after determining the expected best reaction position of polyurethane grout. Multiple formation fractures reach one hole and multiple layers.
[0035] b. Drilling: Drill holes according to the designed drilling position to form a "group hole" structure for grouting and water blocking, and prepare for the subsequent "group hole grouting, front blocking and rear protection". In some cases, drainage holes can be arranged at appropriate positions to reduce the water gushing pressure of drilling and subsequent grouting.
[0036] c. Grouting: During grouting, polyurethane grout and cement grout are alternately injected into all boreholes at the same time, and "Y" three-way connectors are used to inject polyurethane grout a...
Embodiment 3
[0042] A cement-polyurethane composite grouting process for fast water blocking, comprising the following specific steps:
[0043] a. Engineering exploration: According to the fluidity of formation fissures or dynamic water flow, several grouting holes are designed after determining the expected best reaction position of polyurethane grout. Multiple formation fractures reach one hole and multiple layers.
[0044] b. Drilling: Drill holes according to the designed drilling position to form a "group hole" structure for grouting and water blocking, and prepare for the subsequent "group hole grouting, front blocking and rear protection". In some cases, drainage holes can be arranged at appropriate positions to reduce the water gushing pressure of drilling and subsequent grouting.
[0045] c. Grouting: During grouting, polyurethane grout and cement grout are alternately injected into all boreholes at the same time, and "Y" three-way connectors are used to inject polyurethane grout a...
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