Sand bag well point composite light well point deep rapid-draining dynamic consolidation method

Abstract

The invention relates to a composite light well point deep layer rapid discharging power concretion method in a sandbag well point, which comprises the following steps: a sandbag well point is arranged; a light well point pipe is inserted to the sandbag well point; a first precipitation construction in the light well point is carried out; the light well point pipe is drawn out; a first dynamic tamping construction is carried out; after the tamping, a tamping pit is shoved flatly; a second insertion of the light well point pipe is carried out in the original sandbag well point position; a second precipitation construction in the light well point is carried out; the light well point pipe in the sandbag well point is drawn out; a second dynamic tamping construction is carried out; after the tamping, the tamping pit is shoved flatly; a third insertion of the light well point pipe is carried out in the original sandbag well point position; a third precipitation construction in the light well point is carried out; the light well point pipe in the sandbag well point is drawn out; a third dynamic tamping construction is carried out; through a plurality of turns of precipitation constructions in the light well point and dynamic tamping constructions, the last full tamping is carried out. The method can improve the quality of reinforcing the deep layer of the soft foundation which needsto be treated.

Description

technical field [0001] The invention relates to a soft soil foundation treatment method, in particular to a large-area soft soil foundation treatment using sand bag wells combined with light wells (vacuum wells, electroosmotic wells) and precipitation combined with dynamic consolidation construction method. It is suitable for deep treatment of weak ground. It belongs to the technical field of foundation treatment. Background technique [0002] At present, in the large-scale construction of weak foundations, especially in the construction of storage yards and roads, in order to accelerate the improvement of bearing capacity, the method of reducing the water content of the soil in the area to be treated is usually adopted, that is, the method of precipitation, for example, in the area to be treated. Daming ditch dewatering, light well point dewatering and other methods, combined with dynamic compaction, vibratory rolling or impact rolling to achieve rapid consolidation. In f...

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Problems solved by technology

The depth of precipitation cannot reach below 6m, especially in the process of precipitation construction in silty soil, because of its small permeability coefficient, the super static pore water pressure after dynamic compaction dissipates slowly (it takes more than a month to dissipate), which makes the Daminggou precipitation It is difficult to achieve the ideal effect and ideal depth in combination with the dynamic compaction method, such as light well point dewatering, so it is difficult to meet the needs of deep reinforcement of soft soil foundation

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