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Impact type double tube double-motion coring device and its method

A technology of double-pipe double-action and coring device, which is applied in the direction of extraction of undisturbed cores, earth-moving drilling, etc., can solve problems such as large gaps, and achieve the effects of easy operation, convenient disassembly and simple structure

Inactive Publication Date: 2008-08-06
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

Moreover, this gap tends to increase

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  • Impact type double tube double-motion coring device and its method

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Embodiment Construction

[0052] Below in conjunction with accompanying drawing, the present invention is further described:

[0053] 1. The device is produced and installed according to Figure 1, Figure 2, Figure 3.1 and Figure 3.2.

[0054] 2. The structure and function of each component

[0055] 1. Guiding rod (1)

[0056] As shown in Fig. 1, the guide rod (1) is a hollow circular long rod, which requires smooth outer wall and plays the role of connection and guide rail.

[0057] 2. Piercing impact hammer (2)

[0058] As shown in Figure 1, the center-piercing impact hammer (2) is a hollow cylindrical metal hammer, which requires a smooth inner wall, and its inner diameter is about 2mm larger than the outer diameter of the pilot rod (1). Hardness adjustment.

[0059] 3. Impact pad (3)

[0060] As shown in Figure 1, the impact pad (3) is a hollow circular metal disc, which plays the role of force transmission and buffering.

[0061] 4. Outer casing (4)

[0062] As shown in Figure 1, the outer cas...

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Abstract

The invention particularly relates to an impulse type double-pipe double-acting core taking device and a method, which relates to a technique for geotechnical engineering to survey loose ground layer and sample. The structure of the device is that the upper end of a guide rod (1) is connected with a drill rod of a drilling machine, the lower end of the guide rod (1) is connected with an outer cannula (4) after passing through a cross-core jump bit (2) and an impacting disc (3) in turn, the lower end of the outer cannula (4) is connected with an impacting drill head (7), the cross-core jump bit (2) is connected with an automatic hammer dropping device of a hoisting rope of the drilling machine, which is arranged on the impacting disc (3), the inner wall of the outer cannula (4) is provided with a sampling inner pipe (5), the lower end of the sampling inner pipe (5) is connected with a double-layer loose-leaf flap spring plate (6). The impulse type double-pipe double-acting core taking device not only has obvious advantages to invest and sample under complex ground layer loose condition, which can also be used to do geological investigation and sample for the field such as underwater, sea engineering and the like.

Description

technical field [0001] The invention relates to a sampling technology for geotechnical engineering investigation of loose formations, in particular to an impact-type double-tube double-action coring device and method thereof for silt, silty fine sand, medium-coarse sand, strong weathered rock, and the like. [0002] Specifically, it is mainly aimed at the exploration and sampling of soil layers that are difficult to sample loosely in complex strata, highlighting that one cycle can be sampled at any length, the samples in the sampling inner tube are easy to take out and seal up, and the sampling rate and sampling quality are high, especially suitable for Reconnaissance and sampling work with special requirements such as sampling of sediment columnar soil with undisturbed bedding, fine layered sampling, maintaining a certain original structure and structure of the sample, and biological disturbance traces. Background technique [0003] In the investigation and research of mari...

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Application Information

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IPC IPC(8): E21B25/00
Inventor 孟庆山汪稔胡明鉴王新志杨超余克服
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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