A coring device, method and application for maintaining the overall appearance of soil in water-containing loose strata

A coring device and loosening technology, applied in the direction of extraction of undisturbed cores, earthwork drilling, etc., can solve the problems of original structure damage, liquefaction, loose slump of water-containing sandy soil sample cores, etc., to control costs and avoid secondary The effect of disturbance, high coring rate

Active Publication Date: 2020-06-09
JINAN RAILWAY TRANSPORT GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 3. During the transportation process, the sample core is bumped and shaken in the core box, and its original structure will be further damaged, and the water-containing sandy soil sample core is prone to loosening and slumping, and even liquefaction

Method used

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  • A coring device, method and application for maintaining the overall appearance of soil in water-containing loose strata
  • A coring device, method and application for maintaining the overall appearance of soil in water-containing loose strata
  • A coring device, method and application for maintaining the overall appearance of soil in water-containing loose strata

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Embodiment Construction

[0070] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0071] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0072] Such as figure 1 As shown, a coring instrument of the present invention for maintaining the overall appe...

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Abstract

The invention relates to a coring device and method for maintaining the full view of a soil body of a water-bearing unconsolidated stratum and application. According to the coring device, the problems that coring the soil body is difficult and a sample is incomplete in the prior art are solved, and the sampling stability is ensured. The coring device comprises an outer tube assembly and an inner tube assembly; the outer tube assembly comprises an outer sleeve, and a rotary cutting mechanism is connected with the lower end of the outer sleeve through a shoe joint; the inner tube assembly comprises an inner tube barrel, the inner tube barrel is located inside the outer sleeve, the top of the inner tube barrel is connected with the lower portion of a double pipe joint, and the outer sleeve is fixedly connected with the side of the double-pipe joint; a pressing rod joint is connected with the upper end of the double pipe joint through a reducing joint, a ball head is connected with the lower portion of the reducing joint through a spring, and the relative distance between the ball head and a drainage hole is controlled by the spring force to adjust the airtightness of the inner tube barrel; and a plurality of fan-shaped sealed doors are arranged at the lower end of the inner side of the inner tube barrel.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to a coring device, method and application for maintaining the overall appearance of soil in a water-containing loose stratum. Background technique [0002] In recent years, with the vigorous development of urbanization construction and underground space development, more and more engineering constructions are carried out in complex geological environments, and geological survey work is playing an increasingly important role. The main purpose of engineering geological survey is to find out the engineering hydrogeology, geological structure, stratum topography, and rock and soil material properties around the construction site, so as to provide a basis for engineering design and safe construction. [0003] At present, conventional drilling and coring equipment has a high coring rate in rock formations with good integrity or strong cementation, and in loose formations, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/00
CPCE21B25/00
Inventor 孙捷城王国富路林海王丹
Owner JINAN RAILWAY TRANSPORT GRP CO LTD
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