Broken rock coring device for geotechnical engineering investigation

Abstract

The invention discloses a broken rock coring device for geotechnical engineering investigation. The device comprises a disc-shaped top plate, a hollow disc-shaped bottom plate and a circular ring pressing plate which are sequentially arranged on the same normal from top to bottom. The top plate and the bottom plate are connected and fixed through three connecting columns which are distributed in aregular triangle shape at the corresponding positions of the peripheral edges. The bottom plate and the pressing plate are connected through three hydraulic piston cylinders which are distributed ina regular triangle shape at the corresponding positions of the peripheral edges. A mucilage box is arranged in the center of the upper surface of the top plate, an outlet of the mucilage box is externally connected with a liquid conveying pipeline, the liquid conveying pipeline penetrates through through holes in the top plate and the bottom plate and extends to one side of a single-action double-pipe drilling tool, and the lower end of the liquid conveying pipeline is supported by a supporting assembly on the lower surface of the bottom plate. According to the device, high stress generated bya hard soil layer can be reduced in the coring process, the stability of the coring structure is guaranteed, meanwhile, the coring efficiency and quality can be improved, and a high-quality rock coreis provided for subsequent detection.

Description

technical field [0001] The invention relates to the technical field of civil engineering sampling equipment, and more specifically, relates to a geotechnical engineering exploration broken rock coring device. Background technique [0002] Core taking is to use special coring tools to take underground rocks to the ground in blocks during drilling. This block of rocks is called cores, through which various properties of rocks can be measured, and underground structures and rocks can be studied intuitively. The sedimentary environment, understanding of the fluid properties, etc., in the process of mineral exploration and development, it is necessary to carry out drilling work according to the stratum level and depth of the geological design, put the coring tool into the well, and drill the rock samples. The core is The most intuitive and practical data for understanding the underground stratum and mineral-bearing characteristics. Geotechnical engineering survey refers to identi...

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Problems solved by technology

[0003] The existing technology has the following problems: the existing geotechnical engineering survey broken rock coring device, in the process of coring, often due to the different geology of the fixed land, the coring device cannot be fixed well, which reduces the work efficiency At the same time, high stress will be generated in the face of hard soil layers, which will lead to the failure of coring. In addition, for coring in complex rock formations, it is often impossible to achieve better coring results. Therefore, the overall efficiency and quality of coring Low, affecting the subsequent detection effect

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