Patent application EP20171550A (EP), filed 2020-04-27
Publication number: EP3744902A2
Title: A METHOD FOR SOIL CONSOLIDATION
Abstract: [0001]    A placing system of a stopper plug (6) in a perforation in which a land consolidation material is present, said system (1) comprising:
-said plug (6);
-a conduit (2), said conduit (2) at least partly extending outside the perforation along an imaginary prolongation of said perforation;
-introduction means (3) for introducing the plug (6) into said conduit (2);
-a pusher member (4) of the plug (6); the pusher member (4) is movable along the conduit (2) so as to position the plug (6) in the perforation.
IPC codes: C09K  17/    10            A I
C09K  17/    12            A I
E02D   3/    12            A I
E02D  31/    10            A I
E02D  37/    00            A I
E02D   5/    46            A I
E02D   5/    66            A I
Claims: number: 1
text: A method for soil consolidation and/or impermeabilisation, comprising the steps of:
number: 2
text: The method according to claim 1, characterised in that said fluid accelerating material (32) comprises a mixture comprising a diluent and an active accelerant ingredient; the step of dispensing the fluid operating material (31) and the fluid accelerating material (32) in the perforation (4) by means of said rod (2) comprises the sub-step of dispensing within a unit of time a quantity of said active accelerant ingredient that at least in a first position of the rod (2) is less than at least a second position of the drilling rod (2);
in said second position the drilling rod (2) being more extracted from said perforation (4) than in the first position.
number: 3
text: The method according to claim 2, characterised in that the step of dispensing the fluid operating material (31) and the fluid accelerating material (32) occurs during an extraction stroke of the rod (2) from the perforation (4); the rod (2) assuming the first position at the beginning of said step of dispensing the fluid operating material (31) and the fluid accelerating material (32); the rod (2) assuming the second position at the end of the step of dispensing the fluid operating material (31) and the fluid accelerating material (32); the amount of said active ingredient dispensed within a unit of time in the second position is more than double the amount of said active ingredient dispensed in the unit of time in the first position.
number: 4
text: The method according to claim 1, characterised in that said fluid accelerating material (32) comprises a mixture comprising a diluent and an active accelerant ingredient; the step of dispensing a fluid operating material (31) and a fluid accelerating material (32) in the perforation (4) through said drilling rod (2) comprises the step of progressively increasing the amount of active accelerant ingredient dispensed within the unit of time by the rod (2) during at least a predetermined portion of the extraction of the rod (2).
number: 5
text: The method according to claim 2 or 3 or 4, characterised in that said active accelerant ingredient is sodium silicate and said fluid operating material (31) is a cementitious material.
number: 6
text: The method according to any one of the preceding claims, characterised in that it comprises a step of:
number: 7
text: The method according to claim 6 when directly or indirectly dependent on claim 2 or 3 or 4 or 5, characterised in that it comprises, during at least a part of the extraction of the rod (2), the step of adding to the accelerating material (32) already present in the second tank (26) a further active accelerant ingredient.
number: 8
text: The method according to claim 6 or 7, characterised in that during the step of performing an extraction of the rod (2) from the perforation (4), the first line (23) is traversed exclusively by the fluid operating material (31) and the second line (24) is traversed exclusively by the fluid accelerating material (32); the fluid operating material (31) and the fluid accelerating material (32) coming into mutual communication only downstream of the rod (2) or in output from the rod (2), mixing with the soil surrounding the rod (2).
number: 9
text: The method according to any one of the preceding claims, characterised in that the step of dispensing the fluid operating material (31) in the perforation (4) occurs by spraying said fluid operating material (31) at more than 350 bar; the step of dispensing the fluid accelerating material (32) in the perforation (4) occurring by spraying said fluid accelerating material (32) at a pressure comprised between 20 and 200 bar.
number: 10
text: A system for soil consolidation and/or impermeabilisation characterised in that it comprises:
Office action: search_report, dated 2020-12-02
Rejection reasons: novelty_epc_54
Prior art cited: ref_id: EP1520936
ref_type: patent
severity: novelty_destroying
ref_id: US4851259
ref_type: patent
severity: novelty_destroying
ref_id: KR100776304B
ref_type: patent
severity: novelty_destroying
ref_id: KR101545254B
ref_type: patent
severity: novelty_destroying
ref_id: DE1709393
ref_type: patent
severity: novelty_destroying
ref_id: DE102007023736
ref_type: patent
severity: novelty_destroying
Final disposition: pending (2020-12-02)