perfecting the technique of sottofondazione structures means infissione to static pressure, contrary to the existing structure.

摘要

in the processes known to infissione to static pressure, contrasting the structure above them.it is clear that the effort that can be used for the infissione pole may not exceed the weight of existing structures.this makes it possible not only to reduce found equal effort to infissione requested.but also to increase the final magnitude of pole: essentially consists in combining the efforts of static pressure exerted by the cylinder on the head of the pole, the injection of a fluid liquidor areiforme delivered pressure from special installation of injection holes valvolati prepared in steel tube, preferably to its puntazza.in the process of infissione fluid moving up along the outer surface of the tube has a lubricating function and is composed of fluid assolventi for this purpose (e.g.water) and a reduction of effort needed to infissione.reached the required depth is obviously interrupted the push infissione and the injection of the fluid lubricant is replaced with a fluid cementante (e. g.boiacche expansive) that increases the load capacity of the pole.the annex indicates design: 1 structure above; 2 hydraulic pole tubular shank; 3; 4; 5 valves; 6 hydraulic pump double acting pump injection; 7; 8 lubrific liquid tankante; 9 tank liquid cementante.