Soft foundation treatment method based on combination of two-time precipitation and dynamic consolidation

Abstract

The invention discloses a soft foundation treatment method based on combination of two-time precipitation and dynamic consolidation. The soft foundation treatment method comprises following construction steps shown as figure 1: firstly, measuring and setting-out are performed, and a construction area range and a position of a tube well are determined; a drainage ditch is excavated to isolate phreatic water outside the construction area from entering the construction area; a shallow tube well is constructed, and primary precipitation is performed; medium-low energy dynamic compaction is executed, soil mass is consolidated, and phreatic water is extruded to the shallow tube well and pumped out; and vacuum tube well construction and secondary precipitation are performed; medium-high energy dynamic compaction is executed, drainage of pore water in soil mass is accelerated, and reconsolidation of the soil mass is accelerated; finally, low-energy full compaction is adopted to compact soil mass on the surface, the field is leveled, and detection is performed after a rest period.

Description

technical field [0001] The invention specifically relates to a construction method for secondary precipitation combined with dynamic consolidation, and belongs to the technical field of geotechnical engineering design and construction. Background technique [0002] There are many traditional methods for soft foundation treatment. The usual methods are drainage consolidation and dynamic consolidation. The main difficulty in soft foundation treatment is to drain the water in the soil. The drainage system is an important means. The water in the soil is divided into phreatic water and pore water. If the pore water has no pressure difference and no pressurization system, it is difficult to shoot out the water and the soil is also difficult to reinforce. Secondary drainage of the water in the soil can speed up the discharge of phreatic water and pore water in the soil, and applying power in stages can shorten the construction period, reduce costs and improve efficiency. Content...

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Problems solved by technology

[0003] The object of the present invention is to provide a method for treating soft ground with secondary precipitation combined with dynamic consolidation, which is used to overcome the pressure of submerged water and pore water falling together during the construction process, the efficiency is slow, and the power extrusion soil closing filter screen is easy to be applied once a well is completed. The loss of the precipitation function solves the problem of the long construction period of light precipitation and the large footprint. After the soil is powered, the soil squeezes the well point pipe, and the filter screen of the well point pipe is sealed by soft soil, which loses the precipitation function and affects the soil. The problem of strengthening the body

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