Hydraulic dynamic balancing method and system for vibrating gravel

Abstract

The invention discloses a water pressure dynamic balancing method and system for a vibro-replacement stone column machine. A guide rod of a drill rod system of the vibro-replacement stone column machine is a telescopic guide rod. The method includes the steps that when the vibro-replacement stone column machine conducts vibrator ultra-deep construction, the telescopic guide rod is stretched or contracted in a column hole gradually along with the increase or decrease of the vibrating depth, and accordingly a vibrator placed below the telescopic guide rod can vibrate downwards to drill holes or conducts compaction upwards to manufacture columns; in the period that the telescopic guide rod is stretched or contracted gradually, water is injected into the telescopic guide rod continuously, and the telescopic guide rod is full of pressure water; the water pressure in the telescopic guide rod is made to be always larger than the water pressure of the column hole, the pressure water in the telescopic guide rod is forced to flow to mud in the column hole from the shell clearance of the telescopic guide rod, water pressure dynamic balancing in a pipe is achieved, and thus gravel in the mud can be prevented from entering the shell clearance and being clamped in the shell clearance.

Description

technical field [0001] The invention relates to the technical field of foundation engineering construction, in particular to a hydraulic dynamic balancing method and system for vibrating gravel. Background technique [0002] In the soft soil foundation reinforcement treatment project, the vibratory crushed stone pile technology has been widely used due to its advantages of outstanding construction quality, simple construction process, low construction cost, and wide source of filling materials. Especially in earthquake-prone areas, vibro-shock gravel pile reinforcement technology has become the preferred technology for designers because of its anti-liquefaction and outstanding seismic performance of the formed composite foundation. [0003] In essence, the vibroflotation method uses water with higher pressure in the sand, gravel, and soil layers, and sometimes pebbles or gravel are added for replacement. Therefore, the hole is always in a state of mud. Under the condition o...

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Problems solved by technology

[0004] However, since the telescopic guide rod is composed of multi-section guide rods, and works in an environment where gravel, sand, and mud are mixed and the lower part is connected to large-scale vibrating equipment, once the mud and the sand and gravel in it enter the inner and outer guide rods If the telescopic guide rod is stuck in the gap, the vibro impactor will be buried in the hole, which will cause the failure of the vibro impact gravel pile construction and cause huge losses.

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