A kind of survey hole sampling device and control method

Abstract

The invention relates to a reconnaissance hole sampling device and a control method. The device includes a drill cutting assembly, a high-pressure gas lift assembly, a high-pressure slurry delivery assembly, a sedimentation separation assembly, and a connection conversion assembly; wherein, the drill cutting assembly is connected to the connection conversion assembly; The lifting component is connected to the cutting and drilling component; one end of the high-pressure slurry feeding component is connected to the cutting and drilling component, and the other end is connected to the sedimentation and separation component; the sedimentation and separation component is used to process the received three-phase mixture to obtain sampling soil samples. The invention can realize the continuous extraction of soil samples when excavating the exploration holes, complete the exploration of ultra-deep series karst caves without pulling out casings, avoid the occurrence of engineering accidents such as hole collapse and slurry leakage, and improve the safety of drilling in karst cave areas Under the premise, the effect of improving the construction efficiency can be achieved, and at the same time, there is no need to manually extract and knock the drill pipe, and the degree of construction automation can be improved.

Description

technical field [0001] The invention relates to the field of geotechnical investigation, in particular to a survey hole sampling device and a control method. Background technique [0002] In the prior art, before excavating large-diameter piles, it is often necessary to drill survey holes as sampling holes or control holes to determine the distribution of soil layers around the piles. The location of the cave. The diameter of the survey hole is small. The traditional way of extracting soil samples is to pull out the entire drill pipe and knock out the soil sample squeezed into the pipe. Since there may be karst holes in the hole wall at the bottom of the hole, there is no effective support for the hole wall when the protective pipe is pulled out, and friction and disturbance are caused to the hole wall soil during the extraction process, which is easy to cause accidents such as hole collapse. At the same time, this method has low efficiency in obtaining cores and cannot co...

AI Technical Summary

Problems solved by technology

Since there may be karst caves in the hole wall at the bottom of the hole, there is no effective support for the hole wall when the protective pipe is pulled out, and friction and disturbance are caused to the hole wall soil during the pulling out process, which may easily cause accidents such as hole collapse

At the same time, this method has low efficiency in obtaining cores and cannot continuously obtain cores, so the quality of cores cannot be guaranteed

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