Deep replacement dynamic compaction gravel pile foundation reinforcement method

Abstract

The invention discloses a deep replacement dynamic compaction gravel pile foundation reinforcement method. The method includes the following steps that firstly, a pile pipe (5) of a pile machine is aligned with a pile toe (6) in place at a pile position; secondly, a vibrating hammer (3) of the pile machine is started and vibrates to conduct countersinking operation downwards; thirdly, a hopper (1) of the pile machine is used for conducting filling for the first time from a feed port (4); fourthly, the pile pipe (5) of the pile machine ascends, dynamic compaction broaching is conducted, and a dynamic compaction gravel mound is formed; fifthly, the hopper (1) is used for conducting supplementary filling from the feed port (4); sixthly, the fourth step and the fifth step are repeated till the dynamic compaction gravel mound reaches pile tip elevation. Dynamic compaction energy can be effectively led to the foundation deep position through the pile pipe, the defects of the replacement dynamic compaction construction process and the vibration gravel pile process are overcome, quality is high, benefits are good, the construction period is short, and the foundation reinforcement effect is better.

Description

Technical field: [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a foundation reinforcement method for deep displacement dynamic rammed stone piles. Background technique: [0002] The dry vibration gravel pile construction technology and the dynamic compaction replacement construction technology are common compaction and composite foundation treatment methods for soft soil foundations such as muddy soil along the river and along the river, and fill areas. However, the two methods have their own advantages and disadvantages. There are limitations in engineering applications. For example, in the dynamic tamping replacement method, the pore water in the foundation soil has too much loss on the tamping energy, and the tamping energy has a small impact on the depth. It is difficult for the equipment to walk on the weak foundation, it is difficult to pull out the hammer of the dynamic tamping, and the vibrating gravel p...

AI Technical Summary

Problems solved by technology

[0002] The dry vibration gravel pile construction technology and the dynamic compaction replacement construction technology are common compaction and composite foundation treatment methods for soft soil foundations such as muddy soil along the river and along the river, and fill areas. However, the two methods have their own advantages and disadvantages. There are some limitations in engineering applications

For example, in the dynamic tamping replacement method, the pore water in the foundation soil has too much loss on the tamping energy, and the tamping energy has a small impact on the depth. It is difficult for the equipment to walk on the weak foundation, it is difficult to pull out the hammer of the dynamic tamping, and the vibrating gravel pile is unloaded in the saturated muddy soil. Difficult, prone to common problems such as necking, small pile diameter and poor quality

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