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Support construction method for deep foundation pit in complex geological condition
The invention particularly relates to a support construction method for a deep foundation pit in a complex geological condition. The support construction method is characterized by comprising the following steps that 1, trench wall soil is reinforced through a three-axis cement mixing pile; 2, a guide wall of a continuous wall is constructed; 3, trenching construction is conducted after a trench section is divided, and a hydraulic bucket trenching machine is used for grabbing out a soft soil layer on the upper portion in the trench section; 4, a rotary drilling rig conducts rotary excavation and smashing on a rock stratum and drills out drilling slag; 5, a moderately weathered rock stratum and a slightly weathered rock stratum are broken through a percussion drill; 6, the bottom of the hydraulic bucket trenching machine is cleaned; 7, two layers of geotechnical cloth are laid on the two large faces of a reinforcement cages at the same cave depth respectively; 8, a guide pipe is placed downwards into the deep foundation pit, and concrete is poured. By the adoption of the support construction method, soil on the trench walls on the two sides of the foundation pit is reinforced, and the trench wall stability is guaranteed when various machines operate for a long time in the trench section and generate disturbance in the trench section trenching construction process; the efficiency of entering rock of the continuous wall is improved, concrete is effectively saved, and the waste of concrete is reduced.
Support construction method for deep foundation pit in complex geological condition
The invention particularly relates to a support construction method for a deep foundation pit in a complex geological condition. The support construction method is characterized by comprising the following steps that 1, trench wall soil is reinforced through a three-axis cement mixing pile; 2, a guide wall of a continuous wall is constructed; 3, trenching construction is conducted after a trench section is divided, and a hydraulic bucket trenching machine is used for grabbing out a soft soil layer on the upper portion in the trench section; 4, a rotary drilling rig conducts rotary excavation and smashing on a rock stratum and drills out drilling slag; 5, a moderately weathered rock stratum and a slightly weathered rock stratum are broken through a percussion drill; 6, the bottom of the hydraulic bucket trenching machine is cleaned; 7, two layers of geotechnical cloth are laid on the two large faces of a reinforcement cages at the same cave depth respectively; 8, a guide pipe is placed downwards into the deep foundation pit, and concrete is poured. By the adoption of the support construction method, soil on the trench walls on the two sides of the foundation pit is reinforced, and the trench wall stability is guaranteed when various machines operate for a long time in the trench section and generate disturbance in the trench section trenching construction process; the efficiency of entering rock of the continuous wall is improved, concrete is effectively saved, and the waste of concrete is reduced.
Support construction method for deep foundation pit in complex geological condition
SHI QUNKAI (author)
2015-10-07
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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