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High-pressure group hole replacement grouting method and structure in karst region
The invention discloses a high-pressure group hole replacement grouting method and structure in a karst region. A grouting gallery or an adit (2) is arranged above a karst cave area (1), a drilling hole (3) is distributed in the grouting gallery or the adit (2) towards the karst cave area (1), the lower end of the drilling hole (3) is located in the karst cave area (1), and the range where the drilling hole (3) is located is divided into a replacement inlet area (4) and a replacement outlet area (5); sand-mixed cement mortar with the mass ratio of 0.5:1 is injected into the drilling hole (3) in the replacement inlet area (4) through high pressure, filler of the karst cave is extruded out of the drilling hole (3) of the replacement outlet area (5) fully or partially, and then a common cement grouting method is adopted for grouting 24-36 hours later after condensation. The high-pressure group hole replacement grouting method and structure in the karst region realize grouting of medium and small filling-type karst cave and other geological flaw sections in the karst region, and have the advantages of being simple, capable of largely shortening the construction period, low in expense, obvious in effect, capable of guaranteeing grouting quality, and the like.
High-pressure group hole replacement grouting method and structure in karst region
The invention discloses a high-pressure group hole replacement grouting method and structure in a karst region. A grouting gallery or an adit (2) is arranged above a karst cave area (1), a drilling hole (3) is distributed in the grouting gallery or the adit (2) towards the karst cave area (1), the lower end of the drilling hole (3) is located in the karst cave area (1), and the range where the drilling hole (3) is located is divided into a replacement inlet area (4) and a replacement outlet area (5); sand-mixed cement mortar with the mass ratio of 0.5:1 is injected into the drilling hole (3) in the replacement inlet area (4) through high pressure, filler of the karst cave is extruded out of the drilling hole (3) of the replacement outlet area (5) fully or partially, and then a common cement grouting method is adopted for grouting 24-36 hours later after condensation. The high-pressure group hole replacement grouting method and structure in the karst region realize grouting of medium and small filling-type karst cave and other geological flaw sections in the karst region, and have the advantages of being simple, capable of largely shortening the construction period, low in expense, obvious in effect, capable of guaranteeing grouting quality, and the like.
High-pressure group hole replacement grouting method and structure in karst region
QU CHANGHUA (author) / GUO WEIXIANG (author) / YU BO (author) / ZHU DAIQIANG (author) / ZAN TINGDONG (author)
2015-05-06
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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