Ultra-high energy level dynamic compaction and displacement compatible construction technology

Abstract

The invention belongs to the technical field of dynamic compaction in dynamic compaction foundation treatment phase of constructional engineering, in particular to a superhigh energy level dynamic compaction and replacement compatible construction process, and solves the problem that a traditional foundation treatment mode is not suitable for a underwater foundation and a saturated soil foundation, which have strict foundation deformation requirements and include weak intercalated layers. The process is suitable for an undisturbed soft soil foundation, and comprises the following steps: (1) firstly, a thick rubble or first stone under layer is backfilled on the undisturbed soft soil foundation, so that the underwater level elevation is controlled below the earth surface by 1.5 m; (2) the point compaction and the replacement are performed for the foundation for three times; the low energy level treatment is performed firstly, then, the superhigh energy level treatment is performed; and finally, the secondary energy level treatment is performed; and (3) the full compaction construction is performed; and after the construction is finished, the field engineering and the field elevation measurement are performed. The superhigh energy level dynamic compaction and replacement compatible construction process prevents the problems of high construction cost, long working period and difficult construction in other types of foundation treatment modes, such as dispersed piles, rigid piles and bonding strength piles in the composite foundation treatment.

Description

technical field [0001] The invention belongs to the technical field of dynamic compaction in the stage of dynamic compaction foundation treatment in construction engineering, and in particular relates to an ultra-high energy level dynamic compaction and replacement compatible construction technology. Background technique [0002] The dynamic compaction method is a method in which a heavy hammer of tens of tons (generally 8-40t) is freely dropped from a height of tens of meters (generally 6-40m) to compact the soil strongly. Dynamic compaction has 3 different consolidation mechanisms: dynamic compaction, dynamic consolidation and dynamic displacement. [0003] Dynamic tamping replacement is the dynamic tamping that adopts the dynamic replacement method. Stones, gravel, or other coarse-grained materials are continuously filled in the ramming pit, and the soft soil is forcibly rammed and discharged by the dynamic tamping method, forming a larger than rammed soil in the soft soi...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing foundation treatment method is not suitable for groundwater foundations and saturated soil foundations with strict requirements on foundation deformation and weak interlayers, the present invention provides a construction technology compatible with ultra-high energy level dynamic compaction and replacement

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