Method for pile forming by using vibro-replacement stone column machine in ultra-deep overburden layer of ultra-strong earthquake zone

By monitoring the vibratory compaction speed and soil density in real time, and precisely controlling the water pressure and the placement of crushed stone filler, the construction difficulties in the foundation treatment of ultra-deep overburden in ultra-strong earthquake zones were solved, achieving high-quality pile formation of crushed stone piles and reducing the failure rate and engineering risks.

CN116791574BActive Publication Date: 2026-06-09SINOHYDRO FOUND ENG
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Patent Information

Application Number
CN202210255829.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-03-15
Publication Date
2026-06-09
Estimated Expiration
2042-03-15

AI Technical Summary

Technical Problem

Existing technologies cannot precisely control water pressure and the placement of crushed stone filler in the treatment of foundations with ultra-deep overburden in ultra-earthquake zones, resulting in a high failure rate of vibro-compaction construction, uneven pile diameter, and affecting project quality and safety.

Method used

By combining vibratory compactors and water supply, the vibratory compaction speed and soil compaction are monitored in real time, the water pressure and crushed stone filler are precisely controlled, the weight of the filler is ensured by weighing elements, and the pile diameter is measured by radar detection, so as to achieve precise pile formation of crushed stone piles.

Benefits of technology

It improved the success rate of vibro-compaction construction, ensured that the quality of crushed stone piles met the requirements, reduced project risks and economic losses, and improved the safety and continuity of construction.

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Abstract

The application discloses a method for filling and piling of vibro-replacement gravel pile in super-strong earthquake zone with super-deep overburden, which comprises the following steps: forming a gravel pile hole by rapidly vibro-replacing and drilling the stratum with a vibrator and water; detecting the initial material surface height of the gravel pile hole by radio wave before gravel filling is put into the gravel pile hole; obtaining the initial material surface height, and then accurately placing the gravel filling into the gravel pile hole by a loader to form a loose pile body, and detecting the material surface height of the loose pile body; determining the height of the loose pile body according to the material surface height of the loose pile body and the initial material surface height, so as to calculate the pile diameter of the gravel pile section formed by vibro-replacement of the loose pile body by the vibrator. The method can quickly and accurately measure the material surface height before and after vibro-replacement construction, accurately complete the gravel filling, ensure that the weight of the gravel filling used for forming the gravel pile meets the requirements, and accurately control the water pressure according to the vibro-replacement speed and the stratum compactness, so that the vibro-replacement construction can be smoothly carried out.
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