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Uniform-thickness high pressure spraying grouting method used for diaphragm wall construction
The invention discloses a uniform-thickness high pressure spraying grouting method used for diaphragm wall construction. The uniform-thickness high pressure spraying grouting method comprises the following step of performing construction in a variable-speed rotary jet grouting and spray rod variable-speed lifting mode by utilizing a grouter. A nozzle is a single large-diameter nozzle. Through the construction mode of variable-speed rotary jet grouting and spray rod variable-speed lifting, low-speed grouting is performed in the wall forming direction; the grouting time in the wall forming direction is prolonged through low-speed lifting of a spray rod, and the wall forming length in the wall forming direction is increased, so that construction of high pressure spraying grouting holes is reduced, and accordingly the efficiency of the high pressure spraying grouting construction is improved; the wall forming range is larger, and the construction efficiency is higher. The situation that the wall forming thickness at the position of the spray rod is much thinner than that at the jetting far end because of the affection of a tilt angle is avoided. An original double-nozzle structure is replaced through adopting the single nozzle, so that jet power and penetrating power of the nozzle are enhanced; slurry and a soil mass are thoroughly mixed; and impermeability of a wall body is improved. And meanwhile, the situation, which occurs when the double-nozzle structure is adopted, that wall forming on two sides is not symmetrical or wall forming is finished only on one side caused by clogging of a nozzle on one side is avoided.
Uniform-thickness high pressure spraying grouting method used for diaphragm wall construction
The invention discloses a uniform-thickness high pressure spraying grouting method used for diaphragm wall construction. The uniform-thickness high pressure spraying grouting method comprises the following step of performing construction in a variable-speed rotary jet grouting and spray rod variable-speed lifting mode by utilizing a grouter. A nozzle is a single large-diameter nozzle. Through the construction mode of variable-speed rotary jet grouting and spray rod variable-speed lifting, low-speed grouting is performed in the wall forming direction; the grouting time in the wall forming direction is prolonged through low-speed lifting of a spray rod, and the wall forming length in the wall forming direction is increased, so that construction of high pressure spraying grouting holes is reduced, and accordingly the efficiency of the high pressure spraying grouting construction is improved; the wall forming range is larger, and the construction efficiency is higher. The situation that the wall forming thickness at the position of the spray rod is much thinner than that at the jetting far end because of the affection of a tilt angle is avoided. An original double-nozzle structure is replaced through adopting the single nozzle, so that jet power and penetrating power of the nozzle are enhanced; slurry and a soil mass are thoroughly mixed; and impermeability of a wall body is improved. And meanwhile, the situation, which occurs when the double-nozzle structure is adopted, that wall forming on two sides is not symmetrical or wall forming is finished only on one side caused by clogging of a nozzle on one side is avoided.
Uniform-thickness high pressure spraying grouting method used for diaphragm wall construction
ZHANG SONG (author)
2015-10-28
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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