| 摘要 |
Disclosed are a solidified composition to strengthen weak stratum and a construction method using the same. The method comprises the steps of: forming a horizontal drainage layer on the weak stratum; building-up mound structures on the drainage layer-formed weak stratum to the critical mound height; vertically forming holes in said weak stratum; and mixing a first mixture comprising 20-30 parts by weight of cement, and on the basis of 100 parts by weight of the cement, 0.2-0.4 parts by weight of high fluide adjustment-admixture and 0.1-0.2 parts by weight of gel retardant, with a second mixture composed of 70-80 parts by weight of dried sand having a particle size of 0.074-5.0 mm, and on the basis of 100 parts by weight of the cement, 0.3-0.8 parts by weight of aluminum powder, then introducing the final mixture into the holes. By using the method, the weak stratum is rapidly strengthened by friction pile effect of the hardened porous sand pile. In addition, surrounding weak stratum is increased in its strength owing to forcible consolidation dehydration effect, thereby rapidly forming complex stratum. After constructing the porous sand pile in the soil, the construction period is ready for development within one month.
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