Electro-osmosis construction method of geogrid combined with grouting ultra-soft soil

Abstract

The invention discloses a geogrid combined grouting electro-osmosis construction method for ultra-soft soil. The geogrid combined grouting electro-osmosis construction method for ultra-soft soil comprises the following steps: carrying out hydraulic reclamation of mud soil by using hydraulic reclamation construction machinery, performing reinforcement on the mud soil layer at the surface layer of the mud by using a geogrid, and paving geotextile on the surface layer; arranging grouting iron pipes as a positive electrode and a negative electrode; connecting a grouting pump and a horizontal grouting guide pipe by means of a connecting valve, and connecting the horizontal grouting guide pipe with top ends of the grouting iron pipes of the positive electrode and the negative electrode; arranging a drainage main pipe and pumping equipment in an ultra-soft soil place on one side where the cathode is arranged; and switching on the power for electro-osmosis. The geogrid combined grouting electro-osmosis construction method for ultra-soft soil is capable of changing the present situation of separation of electrodes and soil mass, effectively increasing the effective electric potential at the later stage of electro-osmosis, increasing the overall current intensity, and also correspondingly increasing the drainage rate; compared with treating ultra-soft soil by using a conventional electro-osmosis method, the integrity of the soil mass is enhanced by the geogrid, and the efficiency at the later stage of electro-osmosis is improved by the grouting technology; in addition, by means of void filling, differential settlement can also be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of ultra-soft soil foundation treatment, and in particular relates to a drainage reinforcement method for reducing the gap between the electroosmotic electrode and the soil body and improving the integrity and bearing capacity of the soil body by combined grouting of geogrid, which is mainly suitable for coastal silt Engineering technology fields such as soil and dredger fill foundation treatment. Background technique [0002] Coastal muddy soil and dredger fill have high water content, poor permeability, high compressibility, low bearing capacity and long consolidation time. With the demand of economic development in coastal areas, there is more and more demand for reinforcement treatment of ultra-soft soil. Compared with other traditional treatment methods, electroosmosis has significant advantages in the treatment of coastal soft clay and dredging fill, so it is widely used in coastal areas. [0003] In...

AI Technical Summary

Problems solved by technology

However, when it is used in ultra-soft soil such as dredged silt soil, it is generally used as a cushion material for the construction surface, and the pre-loading consolidation method is used after laying vertical drainage and horizontal drainage channels, but only geogrid cannot Carrying large-scale mechanical operations, this method has a long construction period, and the reinforcement effect is difficult to meet the time and design requirements

Images