Method for constructing non-filled vibration-compacted sand piles on silty-fine sand foundation

Abstract

The invention discloses a method for constructing non-filled vibration-compacted sand piles on a silty-fine sand foundation, which includes the steps: firstly, measuring pile positions and setting out lines; secondly, constructing vibration-compacted sand piles, namely, for each vibration-compacted sand pile, setting a vibrator in place, forming a hole for vibration nearby the hole, controlling the vibrator to vertically penetrate into the silty-fine sand foundation to a pile bottom designed elevation at the speed V<descent>; in formation of the hole, using the vibrator to synchronously compact and strength constructed piles around the vibration-compacted sand pile being constructed, performing compaction to form the piles, and controlling the vibrator to slowly ascend to an opening of the hole at the speed V<ascent>; and thirdly, completing construction of the plurality of vibration-compacted sand piles. The method is simple, reasonable in design, convenient in implementation, low in manufacture cost, high in work efficiency, easy for guarantee on construction quality, and can be used for solving the problems that the existing foundation treatment method is high in input cost, complex in construction process, low in construction efficiency, poor in foundation reinforcement effect, unsuitable for deep foundation reinforcement and the like in treatment of the silty-fine sand foundation.

Description

technical field [0001] The invention belongs to the technical field of fine sand foundation treatment, and in particular relates to a construction method of vibrating and compacting sand piles without filling in the fine sand foundation. Background technique [0002] With the further deepening of the western development, especially the construction of the Yulin Energy Heavy Chemical Industry Base, rows of factories and high-rise buildings have sprung up in the deserted sandy seas of the past. On the vast Mu Us Desert in Inner Mongolia, Yulin, builders from all over the country are faced with the technical problem of foundation treatment on loose silt and fine sand. At present, the commonly used foundation treatment methods mainly include water fall sand replacement, dynamic compaction, cement mixing pile, lime-soil compaction pile, vibratory impact compaction method suitable for treating medium sand and coarse sand foundations with clay content not greater than 10%. Wait. ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a construction method for vibro-compacting sand piles without fillers on silt and fine sand foundations. The construction method is simple, the design is reasonable, the implementation is convenient, the cost is low, and the work efficiency Fast, construction quality is easy to guarantee, and can solve the problems of high input cost, complex construction process, low construction efficiency, poor foundation reinforcement treatment effect, and unsuitable for deep foundation reinforcement in the existing foundation treatment methods for the treatment of silt and fine sand foundations. question

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