Sampling device for geotechnical investigation

Abstract

The invention discloses a sampling device for geotechnical investigation, and relates to the technical field of geotechnical investigation. The sampling device comprises a supportingpart, a connectingpart and a sampling part which are arranged in sequence from top to bottom, wherein thesupportingpart comprises an annular supporting seat and a plurality of supporting rods, a top disc is fixedly arranged at the top end of the annular supporting base, andthe top disc is internally and movably provide with a counterweight in a penetrating mode; the connecting part includes a plurality of section-shaped tubes connected end to end, and the section-shaped tubes are internally and movably provide with thrust bars and control assemblies in a penetrating mode; and the sampling part includes an outer cylinder, and an inner cover is disposed in the outer cylinder in a sliding moving mode; and an inner liner cylinderis disposed at the end,away from thesection-shaped tubes,of the inner cover. Whenthe sampling device is in use, an operator knocks on the counterweight, the counterweighttransmits the impact force to the inner cover through the thrust bars, and the inner cover pushes the inner liner cylinderaway from the outer cylinder to extend into a soil layer, so that the acquisition of a soil sample isrealized. Through the multi-stage combination of the section-shaped tubes, the actual sampling depth of the sampling device can be effectively adjusted according to the depth of surveying holes, so that soil samples of different depthscan be rapidly obtained, and the sampling device is convenient to carry and convenient to assemble due to the detachable design.

Description

technical field [0001] The invention relates to the technical field of geotechnical survey, in particular to a sampling device for geotechnical survey. Background technique [0002] In the process of engineering construction, the quality requirements of geotechnical engineering surveys are getting higher and higher, and people's desire to explore underground rocks and soils is also increasing. Therefore, it is necessary to sample rocks and soils at a certain depth to test their physical properties. mechanical parameters. 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. [0003] In view of the above-mentioned problems, the Chinese patent whose patent notification number is CN103868753A proposes a soil fetcher, specifically a liner type undisturbed soil fetch...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: according to the thickness of the soil layer, the excavation depth of the survey hole will be adjusted regularly to reach the target soil layer, but the soil fetcher is limited in size during transportation, so that its actual The sampling depth is also limited, making it difficult to adapt to changes in the actual depth of the survey hole

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