| 摘要 |
FIELD: consolidating by placing solidifying or pore-filling substances in the soil, particularly to compact ground for following foundation erection, to lift large or heavy structures to repair settled structures, to obtain over-consolidation of some ground types. ^ SUBSTANCE: method involves introducing substances expanding under chemical reaction and creating pressure exceeding 500 kPa in ground to be compacted or in ground under structure to be lifted. To introduce above substances a number of holes are made in ground, wherein above holes are separated one from another by gaps and arranged under lower front or under low structure base side. Said expandable substance to be injected in ground consists mixture of polyols and 4,4'-diphenylmethane diisocyanate or similar expandable agent, which begins to expand after 2-25 sec. Volume of expanded substance is 5 times greater than that of substance in un-expanded state. After that one may detect if predetermined compaction degree or structure lifting height are obtained and substance introduction is stopped if above predetermined values are obtained. The invention is developed in independent claims. ^ EFFECT: reduced costs. ^ 18 cl, 1 tbl, 5 dwg |
