Reinforcement method of soft foundation

Abstract

The invention provides a reinforcement method of a soft foundation, and belongs to the technical field of civil engineering. The reinforcement method of the soft foundation comprises the steps that atube well precipitation system is arranged for performing precipitation; primary material-filling pile-forming is carried out at a sand pile point; and secondary material-filling pile-forming is carried out at the position point of the primary material-filling pile-forming. According to the reinforcement method of the soft foundation, during the primary material-filling pile-forming and the secondary material-filling pile-forming, a soil body produces squeezing action and shock excitation and disturbance action, so that most of free water and combined water in the soil body on the periphery ofthe sand pile point is discharge into a precipitation tube well, the influence of the water pressure part in the soil pressure is reduced, the precipitation tube well can further be used as a quick release channel for excess pore water pressure generated by underlying deep silt after the disturbance, an excess pore water pressure value caused by the soil body disturbance is effectively reduced, and engineering quality accidents such as pike breaking and necking down are fundamentally solved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for strengthening weak foundations. Background technique [0002] At present, the coastal area adopts the dredging filling method to achieve the purpose of reclamation from the sea, and the foundation reinforcement treatment is carried out by laying vibratory compaction sand piles. Due to the complex ground conditions of the dredging reclamation site, especially the deep silt in the underlying layer, the silt buried depth is as high as 20m, and the soil will generate a large excess static pore water pressure under the condition of vibration excitation. According to the calculation of Rankine earth pressure, the soil pressure increases with the depth, and the soil pore water pressure increases during the construction of vibratory compaction sand piles, which is very easy to cause engineering accidents such as broken piles and necking. There are many failure cas...

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Problems solved by technology

According to the calculation of Rankine earth pressure, the soil pressure increases with the depth, and the soil pore water pressure increases during the construction of vibratory compaction sand piles, which is very easy to cause engineering accidents such as broken piles and necking. There are many failure cases of the reinforcement method of vibrating compaction sand piles in the silt layer, which limits the application of the compaction sand pile technology to deep silt reinforcement

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