Vibroflotation compaction method for pipeline backfill construction

Abstract

The invention discloses a vibroflotation compaction method for pipeline backfill construction. The vibroflotation compaction method comprises the steps that 1, a test plot is selected, a construction site is cleaned and leveled, point locations are measured and placed through a GPS, the point locations are arranged in a regular triangle mode, and the distance between every two point locations is 2m or 1.5m; 2, a vibroflotation device is installed on a crane and aligned with vibroflotation points; 3, the crane and the vibroflotation device are started, the vibroflotation device sinks rapidly, and the pore forming speed is controlled to range from 2m / min to 2.5m / min; 4, when the vibroflotation device sinks to the preset compaction depth, the water injection amount is reduced to the minimum, vibration is reserved for 10-20s at the depth, and then the vibroflotation device is lifted at a constant speed; 5, the vibroflotation device is lifted at the speed of 1.5-2m / min, and vibration is reserved for 10-20s every time the vibroflotation device is lifted by 0.5m; and 6, after construction of the current point location is completed, shutdown, water shut-off and machine moving positioning operation is conducted, and the steps 2-5 are repeated on another vibroflotation point for construction till construction of the whole test plot is completed. According to the vibroflotation compaction method, after vibroflotation parameters are determined through tests, construction is conducted comprehensively, and the construction quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of civil engineering, and more specifically relates to a vibrating compaction method for pipeline backfill construction. Background technique [0002] At present, for the backfilling of pipeline trenches, the method of layered rolling compaction is often used for layered backfilling, each layer is 15-20 cm, and then compacted, the construction speed is very slow and the efficiency is low. [0003] The most common treatment method for deep sandy soil foundations is vibroflotation, also known as vibratory water flushing. The vibroflotation device is lifted by a crane, and the submersible motor is started to drive the eccentric block, so that the vibrator generates high-frequency vibrations, and the water pump is started at the same time. The high-pressure water flow is sprayed through the nozzle, and under the joint action of vibration and punching, the vibrator is sunk to the predetermined depth in the soil, ...

AI Technical Summary

Problems solved by technology

[0002] At present, for the backfilling of pipeline trenches, the method of layered rolling and compaction is often used for layered backfilling, each layer is 15-20 cm, and then compacted, the construction speed is very slow and the efficiency is low

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