CN210037258U

CN210037258U - Rock-soil body in-situ fidelity sample preparation device

Info

Publication number: CN210037258U
Application number: CN201920276269.0U
Authority: CN
Inventors: 段玲玲; 邓华锋; 支永艳; 潘登; 熊雨; 李涛; 齐豫
Original assignee: China Three Gorges University CTGU
Current assignee: China Three Gorges University CTGU
Priority date: 2019-03-05
Filing date: 2019-03-05
Publication date: 2020-02-07
Anticipated expiration: 2029-03-05

Abstract

The utility model provides a ground body normal position fidelity system appearance device, system appearance portion drilling sample: the upper end of the sample drilling rod is connected with a motor through a telescopic rod, and a sample rotating ring sleeved on the sample drilling rod is connected with the telescopic rod; the telescopic rod drives the sample rotating ring to move up and down along the sample drilling rod in a telescopic mode. The on-site sampling requirement on soil bodies, rock-soil bodies and certain rock-soil body structural surfaces can be met, and early-stage preparation is made for measuring the shear strength of a certain shear surface by carrying out a ring shear test on a later-stage on-site; when the sample drilling ring is used for removing surrounding soil or rock and soil mass, the sample is protected through the sample drilling rod; the telescopic rod can control the drilled space position of the sample drilling ring according to the size of the device for circularly shearing the sample required in the later period; this patent had both broken through the indoor mechanical test's of sample limitation, and in the on-the-spot system appearance, satisfied the normal position fidelity of sample moreover, can not cause destruction to on-the-spot ground body stability.

Description

Rock-soil body in-situ fidelity sample preparation device

Technical Field

The utility model belongs to civil engineering mechanical test instrument field relates to a ground body normal position fidelity appearance device and method.

Background

The rock-soil body mechanical test is a main technical means for geological workers to obtain the mechanical properties of the rock-soil body, most of the rock-soil body mechanical tests for a long time adopt an indoor drilling sampling method, and field sampling is carried back to a laboratory test, such as a direct shear test of soil, field sampling is carried out by using a cutting ring and a soil sampler, and the field sampling is carried back to the laboratory for testing, but the sampling and the transportation process have influence on the soil sample, and the water content can also change; for a soil body direct shear test carried out in the field, a general method comprises the steps of firstly selecting a test area, firstly digging a sample pit in the sampling area, taking the middle part of the sample pit as a circular soil blank sample, and after the sample pit is dug, carrying out circular soil blank sample treatment by using a soil cutting knife or other sample preparation ring cutters or sleeves to obtain a standard sample, wherein the digging and sample preparation process has obvious disturbance on the soil sample, obvious influence on the stress, the water content and the structure of a rock-soil body sample, so that the water loss of the sample is caused, the soil body structure is loose, the original shape of the sample is difficult to ensure, and in addition, the method has larger workload for clearing soil (rock) bodies around the sample (soil body, rock-soil body and structure surface) in the field sample preparation process. Generally, the field test of the rock-soil body, particularly the preparation of an undisturbed sample, is still a difficult point in the field of geotechnical engineering, so that the design of a test sample preparation device which is simple to operate and has a good sample preparation effect is particularly necessary.

Disclosure of Invention

The utility model aims at providing a ground body normal position fidelity system appearance device adopts machine control, and the operation is convenient, has broken the experimental limitation of indoor mechanics, has realized open-air on-the-spot mechanical test's maneuverability, carries out shear test for the later stage scene and has established the basis.

The utility model discloses a solve the technical scheme that above-mentioned problem adopted and be: the in-situ fidelity sample preparation device also comprises a supporting platform and a sample preparation part, wherein the motor is arranged on the supporting platform, and a driving shaft of the motor penetrates through the supporting platform to be mechanically connected with the sample drilling rod;

drilling and sampling of the sample preparation part: the sample drilling device comprises a sample drilling rod and a telescopic rod, wherein the upper end of the sample drilling rod is connected with a motor through the telescopic rod, and a sample rotating ring sleeved on the sample drilling rod is connected with the telescopic rod; the telescopic rod drives the sample rotating ring to move up and down along the sample drilling rod in a telescopic mode;

the sample transferring ring consists of a plurality of sample transferring sheets, the sample transferring sheets are connected with the telescopic rod through an extension rod, the telescopic rod is a telescopic part driven by hydraulic oil, a hydraulic driving device is communicated with the inside of the telescopic rod through a first oil path, and the lower ends of the sample transferring sheets are provided with sample drilling notches;

the extension rod is an extension part driven by hydraulic oil, and the hydraulic driving device is communicated with the interior of the extension rod through a second oil path.

Rock-soil body normal position fidelity system appearance device and method have the advantage:

(1) after a required sample is drilled through a sample drilling rod, the locking button is screwed down, so that the bottom of the sample is not separated from a rock-soil body, the in-situ property of the sample is kept, and the rock-soil body around the sample is gradually drilled and removed by adopting a sample rotating ring; the extension rod is controlled, so that the drill bit on the drill sample ring is extended, the rock and soil mass around the sample is gradually removed, the space around the sample is enlarged, the space required by the torsional shear test device can be installed according to the field shear strength test in the later stage, and the length of the extension rod is controlled.

(2) The device is simple to operate, is suitable for on-site rock-soil bodies, structural surfaces and the like, overcomes the influence of complex outdoor terrain by combining the drilling sample rod and the drilling sample ring, realizes the operability of field tests, lays a foundation for the research of the mechanical property of the rock-soil bodies, and has certain spacing holes between the drilling sample rod and the drilling sample ring, so that the drilling sample ring does not damage a sample in the operation process, and the in-situ property of the sample is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a rock-soil body in-situ fidelity sample preparation device and method.

FIG. 2 is a schematic view of a drill rod and a sample ring.

FIG. 3 is a schematic view of a transfer ring.

FIG. 4 is a schematic view of the connection inside the rotor ring.

FIG. 5 is a schematic illustration of an in situ fidelity sample.

Fig. 6A-a is a schematic cross-sectional view.

As shown in the figure, the device comprises a hydraulic driving device 1, a motor 2, a supporting platform 4, a telescopic rod 5, a sample transferring ring 6, a sample drilling rod 7, a sample transferring piece 8, an extension rod 9, a sample drilling notch 12, a rock sample 15 and an annular test port 16.

Detailed Description

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings:

as shown in fig. 1 and 2, the in-situ fidelity sample preparation device comprises a sample preparation part, wherein the sample preparation part is drilled for sampling:

the sample preparation part comprises a sample drilling rod 7 and a telescopic rod 5, the upper end of the sample drilling rod 7 is connected with the motor 2 through the telescopic rod 5, and a sample transferring ring 6 sleeved on the sample drilling rod 7 is connected with the telescopic rod 5;

the telescopic rod 5 is flexible to drive the sample rotating ring 6 to move up and down along the sample drilling rod 7, preferably, the telescopic rod 5 is a flexible part driven by hydraulic oil, the hydraulic driving device 1 is communicated with the inside of the telescopic rod 5 through a first oil way, and during operation, the hydraulic driving device 1 injects the hydraulic oil into the telescopic rod 5 through the first oil way to extend the telescopic rod 5.

Preferably, normal position fidelity system appearance device still includes supporting platform 4, and motor 2 sets up on supporting platform 4, supporting

platform

4 and 7 mechanical connections are bored to motor 2's drive shaft, and the during operation motor 2 drive is bored the rotation of appearance pole 7 and is taken a sample to the rock specimen.

As shown in fig. 3 and 4, the sample transferring ring 6 is composed of four sample transferring pieces 8, the sample transferring pieces 8 are connected with the telescopic rod 5 through extension rods 9, preferably, sample drilling notches 12 are formed in the lower ends of the sample transferring pieces 8, the extension rods 9 are extension parts driven by hydraulic oil, and the hydraulic driving device 1 is communicated with the inside of the extension rods 9 through second oil paths. When the sample transferring device works, hydraulic oil is injected into the extension rod 9 by the hydraulic driving device 1 through the second oil path (the second oil path partially penetrates through the wall of the telescopic rod 5), so that the extension rod 9 extends to realize outward expansion of the four sample transferring pieces 8.

The in-situ fidelity sample preparation method comprises the steps of positioning sampling and forming an annular test port;

positioning sampling, driving a drilling sample rod 7 to drill and sample at a sample pre-taking position by a motor 2, stopping sampling after the drilling sample rod 7 is put in place, locking the drilling sample rod 7 by using a locking button, and protecting a rock sample by using the drilling sample rod 7;

the annular test port is formed, the telescopic rod 5 is extended (the hydraulic driving device 1 injects hydraulic oil into the telescopic rod 5) to drive the sample transferring ring 6 to move from top to bottom along the sample drilling rod 7, and meanwhile, the extension rod 9 is extended (the hydraulic driving device 1 injects hydraulic oil into the extension rod 9 through the second oil way) to drive the sample transferring piece 8 to expand outwards, so that the annular test port is formed.

As shown in fig. 5 and 6, after the apparatus and method of the present patent are used, a rock sample 15 as shown in the figure can be prepared, and an annular test port 16 can be installed to obtain a space for installing a shear test device.

The utility model discloses a core lies in through boring appearance pole 7 and the collaborative work who bores appearance ring 6, and the first step is accomplished the sample of rock specimen 15 earlier, later utilizes to bore appearance pole 7 and protects rock specimen 15, and the second step is under the condition that bores appearance pole 7 and protect rock specimen 15, makes to bore appearance ring 6 and makes simultaneously and bores appearance ring 6 and outwards expand along boring appearance pole 7 removal, clears away the peripheral rock specimen soil of rock specimen 15, forms annular test mouth 16.

Claims

1. Rock-soil body normal position fidelity system appearance device, characterized by: the device includes system appearance portion, system appearance portion drilling sample:

the sample preparation part comprises a sample drilling rod (7) and a telescopic rod (5), the upper end of the sample drilling rod (7) is connected with the motor (2) through the telescopic rod (5), and a sample rotating ring (6) sleeved on the sample drilling rod (7) is connected with the telescopic rod (5);

the telescopic rod (5) telescopically drives the sample rotating ring (6) to move up and down along the sample drilling rod (7).

2. The in-situ fidelity sample preparation device for rock-soil mass according to claim 1, wherein: the device further comprises a supporting platform (4), the motor (2) is arranged on the supporting platform (4), and a driving shaft of the motor (2) penetrates through the supporting platform (4) to be mechanically connected with the sample drilling rod (7).

3. The in-situ fidelity sample preparation device for rock-soil mass according to claim 1, wherein: the sample transferring ring (6) is composed of a plurality of sample transferring sheets (8), and the sample transferring sheets (8) are connected with the telescopic rod (5) through the extension rod (9).

4. The in-situ fidelity sample preparation device for rock-soil mass according to claim 1, wherein: the telescopic rod (5) is a telescopic component driven by hydraulic oil, and the hydraulic driving device (1) is communicated with the inside of the telescopic rod (5) through a first oil way.

5. The in-situ fidelity sample preparation device for rock-soil mass according to claim 3, wherein: the lower end of the sample transferring sheet (8) is provided with a sample drilling notch (12).

6. The in-situ fidelity sample preparation device for rock-soil mass according to claim 3, wherein: the extension rod (9) is an extension part driven by hydraulic oil, and the hydraulic driving device (1) is communicated with the interior of the extension rod (9) through a second oil path.