METHOD OF INCREASING BEARING STRENGTH OF PILING Russian patent published in 2010 - IPC E02D3/12 

FIELD: building.

SUBSTANCE: method of increasing bearing strength of piling involves two-stage forced feed of a hardening solution in a ground. At first the hardening solution is fed around the periphery of the secured piles. At the first stage, injectors are poled in a ground in parallel piles around the periphery of the secured piles at 0.5-2 m intervals, at a depth of projected impaction. Then through the injectors, the hardening solution is pressurised to ensure hydraulic fracturing of the ground. The feed is continued until adjacent impaction areas close up to form after hardening around the peripheral outline of the secured piles, a durable screen with broken ground structure reinforced by the hardening solution. The second stage involves feed of the hardening solution into the area within the peripheral contour including an interpile space which is ensured with using the pressurised injectors enabling for leak-free conditioning of the ground in the formed screen and in the closed-up piling field. The ground is transformed into a solid mass throughout all sites, including in the interpile space. The near-pile ground is treated as well.

EFFECT: higher efficiency of securing the pile base, increased degree of impaction and ground pressure on a lateral surface of the pile with simplified execution of works.

3 cl, 2 dwg