Hydraulic fixing type sampler and sampling method thereof

Abstract

The invention provides a novel hydraulic fixing type sampler and a sampling method thereof. The sampler comprises the following components from up to bottom in order: a drill pipe joint, an annular sealing cap, a vacuum inner pipe, an annular piston, a cylinder, a piston rod, a fixing pipe, a fixing ring, a top board and a sampling pipe; a cylinder is internally distributed with a pressure releasehole and a drain hole; a hydraulic transmission system is connected with a sampler at the upper part of the drill pipe joint through a drill pipe. The novel hydraulic fixing type sampler has the advantages of simple structure, rapid sampling speed, simple operation, high sampling quality, and low sampling cost; and a prospecting tool for civil engineering ground investigation.

Description

technical field [0001] The invention relates to a hydraulic fixed sampler, which belongs to the field of geotechnical engineering in civil engineering. Background technique [0002] With the continuous development of geotechnical engineering, people's desire to explore underground rocks and soils is increasing. Therefore, it is necessary to sample rocks and soils at a certain depth to test their physical and mechanical parameters. However, the quality of the sample can significantly affect its physical and mechanical parameters, and then affect the safety and cost of the construction project. Therefore, the type of sampler and its correct and reasonable selection are crucial to the quality of the sample. At present, there are many types of samplers to obtain undisturbed samples. For example, large-diameter samplers can obtain high-quality samples, but the sampling depth is only 15-25 meters, and the sampling cost is high. With the further development of sampling technology,...

AI Technical Summary

Problems solved by technology

At present, there are many types of samplers to obtain undisturbed samples. For example, large-diameter samplers can obtain high-quality samples, but the sampling depth is only 15-25 meters, and the sampling cost is high

With the further development of sampling technology, the appearance of fixed piston sampler (hydraulic sampler, oil pressure sampler), not only can obtain high-quality samples but also its sampling depth is not limited, the sampling cost is relatively low, but the current hydraulic The casing of the sampler is limited to 76.2 mm due to insufficient power, and the selection of sampling tubes is also simplified, which cannot be adapted to various diameters of sampling tubes

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