Vacuum and dynamic compaction synchronization method

Abstract

The invention discloses a vacuum and dynamic compaction synchronization method, which comprises the following steps of: a, measuring the thickness of a permeable ventilated soil layer of the surface layer of a treatment field; b, inserting vertical drainage boards into the treatment field according to a square or a quincuncial pile type, and sealing the drainage boards which are positioned in the permeable ventilated soil layer and exposed by using a sealing paint in advance according to the inserting depth and the thickness of the permeable ventilated soil layer before inserting; c, connecting the external ends of the drainage boards to a vacuumizing device for vacuumized construction, performing dynamic compaction on the soft soil foundation in the vacuumizing process synchronously, and assisting information construction simultaneously; and d, meeting the unloading requirement and unloading the vacuum load. By performing vacuum pre-pressing and dynamic compaction synchronously, the method can greatly shorten the construction period, reduce the cost, and create better quality.

Description

technical field [0001] The invention belongs to the technical field of soft ground treatment, and in particular relates to a large-area soft ground treatment method. Background technique: [0002] The existing soft soil foundation treatment techniques commonly used include drainage consolidation method, dynamic compaction method, composite foundation method, etc. [0003] Among them, due to the limited pressure provided by the drainage consolidation method, the ideal overload level cannot be achieved. The treated foundation often cannot meet the bearing capacity and deformation requirements of buildings and structures, and the construction period is long. [0004] The dynamic compaction method is not suitable for strengthening soft soil foundations, especially saturated soft soil foundations. Under the action of strong impact force, not only is it easy to cause buried hammers or surrounding uplifts, but the high-pressure pore water formed cannot be discharged in a short time...

AI Technical Summary

Problems solved by technology

[0003] Among them, due to the limited pressure provided by the drainage consolidation method, the ideal overload level cannot be achieved. The treated foundation often cannot meet the bearing capacity and deformation requirements of buildings and structures, and the construction period is long.

[0004] The dynamic compaction method is not suitable for strengthening soft soil foundations, especially saturated soft soil foundations. Under the action of strong impact force, not only is it easy to cause buried hammers or surrounding uplifts, but the high-pressure pore water formed cannot be discharged in a short time, thus Causes "rubbery soil", leading to project failure

In addition, the dynamic compaction method cannot strengthen the deep soil. When there is a soft soil layer under the ground, settlement and settlement difference will occur under the upper load or self-consolidation after construction, resulting in damage to buildings and structures.

Moreover, the excess pore water pressure formed by the dynamic compaction method takes a long time to dissipate, and the construction period is also long;

[0005] Due to the immature calculation theory of the bearing capacity and deformation of the composite foundation method, and its high cost and long construction period

[0006] The existing soft soil foundation treatment technologies all have imperfections, so providing a soft soil foundation treatment method with lower cost, shorter construction period and better quality has become a technical problem that needs to be solved in the industry

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