CN213842830U - Anti-eccentricity device for indoor rock anchoring experiment - Google Patents
Anti-eccentricity device for indoor rock anchoring experiment Download PDFInfo
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- CN213842830U CN213842830U CN202022583663.4U CN202022583663U CN213842830U CN 213842830 U CN213842830 U CN 213842830U CN 202022583663 U CN202022583663 U CN 202022583663U CN 213842830 U CN213842830 U CN 213842830U
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Abstract
本实用新型提供种室内岩体锚固实验防偏心装置，用于在岩体锚固实验中对锚杆进行定位，使锚杆与岩体试块的钻孔同心，防偏心装置包括底座和定位件；底座具有放置面，以对岩体试块进行放置；定位件设置于底座中心处、并伸入钻孔内，定位件具有与钻孔相适配的外表面，以对岩体试块进行定位；定位件还具有与放置面垂直的中心孔，沿中心孔向钻孔内插入锚杆，锚杆与中心孔相适配，以保持锚杆与钻孔同心定位；其中，中心孔的轴线位于底座中心处、并与外表面外接圆的圆心重合；从而避免锚杆插入钻孔阶段，因锚杆与钻孔发生偏心现象，而对实验结果造成的不利影响，从而保证了锚杆安装这一关键试验步骤的科学性和准确性，对锚固试验研究起到了推进作用。
The utility model provides an anti-eccentricity device for an indoor rock mass anchoring experiment, which is used for positioning an anchor rod in a rock mass anchoring experiment, so that the anchor rod is concentric with the borehole of a rock mass test block, and the anti-eccentricity device comprises a base and a positioning member; The base has a placement surface to place the rock mass test block; the positioning piece is arranged at the center of the base and extends into the borehole, and the positioning piece has an outer surface that matches the borehole to position the rock mass test block; positioning The part also has a center hole perpendicular to the placement surface, and the anchor rod is inserted into the drill hole along the center hole, and the anchor rod is matched with the center hole to maintain the concentric positioning of the anchor rod and the drill hole; wherein, the axis of the center hole is located at the center of the base, and coincides with the center of the circumcircle of the outer surface; thus avoiding the adverse effect on the experimental results caused by the eccentricity of the bolt and the drilled hole in the stage of the bolt being inserted into the hole, thus ensuring the safety of the key test step of bolt installation. Scientific and accurate, it has played a role in promoting the research of anchoring test.
Description
Technical Field
The utility model belongs to the technical field of indoor rock mass anchor test, concretely relates to anti-decentration device of indoor rock mass anchor experiment.
Background
In recent years, with the rapid development of economy in China, large engineering projects such as traffic engineering, resource exploitation, hydroelectric engineering and the like are constructed and implemented successively. However, due to complex geological conditions and poor rock stability, the engineering rock mass catastrophe problem is increasingly prominent. The anchor rod anchoring technology has the characteristics of simple construction process, good reinforcing effect, relatively low manufacturing cost and the like, and is widely applied to the field of geotechnical engineering disaster prevention and reinforcement. However, the research of the anchoring theory lags behind the engineering practice, which is a problem to be solved urgently at present, particularly, the research on the anchoring mechanism of the rock mass containing the structural plane, such as joints, bedding and the like, is very insufficient, and a related anchoring theory system and a failure criterion are not established. Therefore, the method of indoor tests of the anchored rock mass has practical significance in reasonably and fully exploring the anchoring support theory on the scientific research level.
At present, the method of conducting indoor rock mechanical tests such as uniaxial, direct shearing, drawing and the like on the anchored rock mass prepared by drilling, grouting, anchoring and the like on the cubic jointed rock mass sample becomes a main method for researching the anchoring mechanism. The installation of stock is the key step of this experiment, but often adopts comparatively subjective modes such as visual inspection method to carry out the stock installation in the laboratory test manufacture process at present, and the inevitable stock that causes takes place the off-centre in the drilling, and then causes adverse effect to the test result.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the eccentric problem of stock emergence in the drilling among the above-mentioned prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
an anti-eccentricity device for an indoor rock mass anchoring experiment is used for positioning an anchor rod in the rock mass anchoring experiment, so that the anchor rod is concentric with a drilled hole of a rock mass test block, and the anti-eccentricity device comprises a base and a positioning piece;
the base is provided with a placing surface for placing the rock mass test block;
the positioning piece is arranged at the center of the base and extends into the drill hole, and the positioning piece is provided with an outer surface matched with the drill hole so as to position the rock mass test block;
the positioning piece is also provided with a central hole perpendicular to the placement surface, the anchor rod is inserted into the drilled hole along the central hole, and the anchor rod is matched with the central hole so as to keep the anchor rod and the drilled hole to be positioned concentrically;
the axis of the central hole is positioned at the center of the base and is coincided with the circle center of the circumcircle of the outer surface.
As an optimization, the middle of the base is provided with a mounting hole, and the positioning piece is assembled in the mounting hole in a detachable mode.
Preferably, the mounting hole is provided with internal threads, and the positioning piece is screwed in the mounting hole, so that the positioning piece can be displaced along the axial direction of the mounting hole.
Preferably, the height of the part of the positioning piece extending out of the placing surface is 5-10 mm.
Preferably, the outer surface of the positioning element is provided with two planes extending along the axial direction of the positioning element, and the planes are holding planes for installing the positioning element.
As above, preferably, a plurality of support legs capable of being adjusted in height are distributed below the base along the circumferential direction of the base, so as to adjust the inclination angle between the placing surface and the horizontal plane, and make the placing surface parallel to the horizontal plane.
Preferably, the support legs are bolts which are assembled below the base in a threaded manner, and the bolts are vertically distributed with the placing surface so as to adjust the inclination angle between the placing surface and the horizontal plane, so that the placing surface is parallel to the horizontal plane.
As above, the anti-eccentric device for indoor rock mass anchoring experiment preferably comprises a regular quadrilateral plate body, four support legs are arranged, and are distributed below the base along the circumferential direction.
Preferably, the side length of the base is 150 mm.
Preferably, the positioning member is a hollow cylinder.
Compared with the closest prior art, the utility model provides a technical scheme has following beneficial effect:
the base is provided with a placing surface parallel to the horizontal plane and used for placing a rock mass test block, a positioning piece is arranged on the base and provided with a central hole, and the central hole is vertical to the placing surface; the outer surface of the positioning piece is matched with the inner diameter of a rock mass test block drilling hole, the rock mass test block can be limited, an anchor rod extending upwards into the rock mass test block drilling hole is placed in the central hole, the central hole is used for concentrically limiting the anchor rod, and the anchor rod is kept perpendicular to a placing surface; the axis of the central hole coincides with the center of a circle circumscribed on the outer surface, so that the aim of concentricity of the anchor rod and the drilled hole is fulfilled, and the coaxiality of the anchor rod and the drilled hole is further ensured; therefore, the adverse effect on the experimental result due to the fact that the anchor rod is eccentric with the drilled hole in the anchor rod inserting drilling stage is avoided, the scientificity and the accuracy of the key test step of anchor rod installation are guaranteed, and the anchor rod installing test method plays a role in propelling the anchor rod test research.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Wherein:
fig. 1 is a front view of an anti-decentration device provided in an embodiment of the present invention;
fig. 2 is a top view of an anti-decentration device provided in an embodiment of the present invention;
fig. 3 is an isometric view of an anti-decentration device provided in an embodiment of the present invention.
Illustration of the drawings: 1. a base; 2. a positioning member; 3. a support leg; 4. a central bore; 5. and (5) grasping the face.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, and may be, for example, either fixed or detachable; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model provides an anti-eccentricity device for an inner rock mass anchoring experiment, which is used for positioning an anchor rod and a rock mass test block in the rock mass anchoring experiment so as to avoid the eccentricity of the anchor rod and the drilling hole of the rock mass test block, wherein a base 1 is provided with a placing surface parallel to a horizontal plane for placing the rock mass test block, a positioning part 2 is arranged on the base 1, the positioning part 2 is provided with a central hole 4, and the central hole 4 is vertical to the placing surface; the outer surface of the positioning piece 2 is matched with the inner diameter of a rock mass test block drilled hole, the rock mass test block can be limited, an anchor rod which extends upwards into the drilled hole of the rock mass test block is placed in the central hole 4, and the central hole 4 is used for concentrically limiting the anchor rod to keep the anchor rod perpendicular to the placing surface; the axis of the central hole 4 is superposed with the circle center of the external circle of the outer surface, so that the aim of concentricity of the anchor rod and the drill hole is fulfilled, and the coaxiality of the anchor rod and the drill hole is further ensured; therefore, the adverse effect on the experimental result due to the fact that the anchor rod is eccentric with the drilled hole in the anchor rod inserting drilling stage is avoided, the scientificity and the accuracy of the key test step of anchor rod installation are guaranteed, and the anchor rod installing test method plays a role in propelling the anchor rod test research.
As shown in fig. 1-3, an anti-eccentricity device for an indoor rock mass anchoring experiment is used for positioning an anchor rod in the rock mass anchoring experiment, so that the anchor rod is concentric with a drilled hole of a rock mass test block, and the anti-eccentricity device comprises a base 1 and a positioning piece 2; the base 1 is provided with a placing surface for placing a rock test block; the positioning piece 2 is arranged at the center of the base 1 and extends into the drill hole, and the positioning piece 2 is provided with an outer surface matched with the drill hole so as to position the rock mass test block; the positioning piece 2 is also provided with a central hole 4 vertical to the placing surface, an anchor rod is inserted into the drilled hole along the central hole 4, and the anchor rod is matched with the central hole 4 so as to keep the anchor rod and the drilled hole to be positioned concentrically; wherein, the axis of the central hole 4 is positioned at the center of the base 1 and is superposed with the center of a circle circumscribed to the outer surface. The base 1 is provided with a placing surface parallel to a horizontal plane and used for placing a rock mass test block, the base 1 is provided with a positioning piece 2, the positioning piece 2 is provided with a central hole 4, the central hole 4 is vertical to the placing surface, an anchor rod extending upwards into a drill hole of the rock mass test block is placed in the central hole 4, the anchor rod is limited by the central hole 4 and is kept vertical to the placing surface, so that the aim of concentricity with the drill hole is fulfilled, the outer surface of the positioning piece 2 is matched with the inner diameter of the drill hole of the rock mass test block, the rock mass test block can be limited, and the coaxiality of the anchor rod and the drill hole is further guaranteed; therefore, the scientificity and the accuracy of the key test step of the anchor rod installation are ensured, and the anchor rod installation test method plays a role in promoting the anchor rod test research.
The utility model also has the following implementation mode that the middle part of the base 1 is provided with a mounting hole, and the positioning piece 2 is assembled in the mounting hole in a detachable mode; install setting element 2 on base 1 through detachable mode, its middle part sets up centre bore 4, can select according to actual need setting element 2 that has different centre bore 4 internal diameters, makes this device be suitable for the test of multiple diameter stock, improves the adaptation rate of this device. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In this embodiment, the mounting hole has the internal thread, 2 surfaces of setting element have with the external screw thread of internal thread to the adaptation, thereby can be with 2 threaded assembly of setting element in the mounting hole, it is well known, threaded connection is a widely used detachable fixed connection, simple structure has, connect reliably, install and remove advantages such as convenience, in addition, threaded connection's stability is stronger, can further guarantee the stability of stock, improve the axiality between stock and the drilling, the stock top that unstable caused is connected to base 1 because of setting element 2 sways, thereby avoid stock and drilling to take place off-centre. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the present embodiment, the positioning element 2 is screwed into the mounting hole along the spiral rotation of the positioning element 2, so that the positioning element 2 can move along the axial direction of the mounting hole. And then adjust the height that the setting element 2 stretches out the placing surface part, confirm the height that the stock stretches out the placing surface part according to the length of stock and external diameter size, screw setting element 2, setting element 2 realizes the longitudinal position adjustment along the screw thread rotation, thereby make the setting element 2 upwards stretch out the part of placing surface and reach the default, wherein, the height that the setting element 2 stretches out the placing surface part is 5-10mm (like 5m, 6m, 6.5m, 7m, 7.5m, 8m, 9m, 10 m). It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In this embodiment, the outer surface of the positioning member 2 has two planes extending along the axial direction thereof, the planes are used as holding surfaces 5, and the operator can rotate the positioning member 2 by holding the planes with hands, so that the positioning member 2 is screwed on the base 1, and the planes are used as the holding surfaces 5, thereby effectively reducing the difficulty of installing the positioning member 2. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The utility model discloses still have following embodiment, base 1 below distributes along its circumference has a plurality of stabilizer blades 3 that can carry out height control, and 3 high in order to realize the face of placing and the adjustment of horizontal plane inclination angle through the adjustment stabilizer blade, make the face of placing parallel with the horizontal plane. The placing surface is ensured to be parallel to the horizontal plane through the adjustment of the supporting legs 3, so that the rock mass sample is ensured not to incline under the influence of the placing surface, and the positioning piece 2 abuts against the side wall of the higher side of the drilling hole when the positioning piece 2 inclines due to the small clearance between the drilling hole and the outer surface of the positioning piece 2, so that the coaxiality of the drilling hole and the positioning piece is reduced; can improve the stock and the axiality of drilling through placing the face perpendicularly with the horizontal plane, avoid stock and drilling to take place off-centre. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In this embodiment, the support legs 3 are bolts which are assembled below the base 1 in a threaded manner, the bolts are vertically distributed with the placing surface, and the bolts are screwed to change the height of the support legs 3 and adjust the inclination angle of the placing surface, so that the placing surface is parallel to the horizontal plane. Wherein stabilizer blade 3 is the perpendicular bolt of assembling in base 1 below, and altitude mixture control can be realized to the rotating bolt, convenient to use, and moreover, the bolt passes through threaded connection on base 1, has higher stability. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment, in the rock mass anchoring test, a rock mass sample commonly used in the indoor rock mass anchoring test is a cubic test block with the side length of 150mm, and a drilling hole of the test block is positioned at the center of the bottom surface of the test block, so that the base 1 is a regular quadrilateral plate body; wherein, stabilizer blade 3 has four, and four stabilizer blades 3 distribute in base 1 below along circumference, and four stabilizer blades 3 are in order to support base 1, realize placing a slope angle adjustment. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In this embodiment, for the size phase-match with the rock mass sample, the utility model discloses well base 1's length of side is 150 mm. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The utility model discloses in the above-mentioned embodiment, the setting element is hollow cylinder, because the relative contactable area of cylinder and drilling is bigger to guarantee the stock be convenient for the installation and with the setting element 2 between have stronger stability, and then effectively improve the relative stability between stock and the drilling, avoid taking place off-centre. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the above embodiments of the present invention, the concrete operations of the indoor anchoring rock mass test are as follows:
1. adjusting the base 1 to enable the base 1 to be parallel to the plane;
2. inserting the anchor rod into the positioning hole to enable the anchor rod to be vertical to the placing surface;
3. the rock mass test block after will holing is placed on device base 1, and the stock passes the drilling, and the rock mass test block aligns with base 1, and rock mass test block drilling and 2 position coincidences of setting element have therefore guaranteed that the stock just in time is located rock mass drilling central authorities, prevent its eccentric phenomenon's emergence.
4. And grouting is carried out in the drilled hole, the anchored sample can be taken down from the anti-eccentricity device after full maintenance, and the manufacture of the anchored rock mass sample is completed. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
To sum up, the utility model provides an anti-eccentricity device for an inner rock mass anchoring experiment, which is used for positioning an anchor rod and a rock mass test block in the rock mass anchoring experiment so as to avoid the eccentricity of the anchor rod and the drilling hole of the rock mass test block, and is provided with an adjustable placing surface which is parallel to a horizontal plane, thereby avoiding the reduction of the coaxiality of the drilling hole generated by the inclination of the rock mass test block and a positioning piece 2; the outer surface of the positioning piece 2 is matched with the inner diameter of a rock mass test block drill hole, and the rock mass test block can be limited, so that the coaxiality of the anchor rod and the drill hole is further ensured; centre bore 4 is perpendicular with the face of placing, place the stock of the drilling that upwards stretches into the rock mass test block in centre bore 4 to centre bore 4 carries on spacingly to the stock, makes it keep perpendicular with the face of placing, thereby realize with the endocentric purpose of drilling, thereby avoid the stock to insert the drilling stage, take place eccentric phenomenon because of stock and drilling, and the adverse effect that causes the experimental result, thereby guaranteed the scientific and the accuracy of this key test step of stock installation, played the propulsive effect to the anchor test research.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the following claims are intended to cover all modifications, equivalents, and improvements falling within the spirit and principles of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022583663.4U CN213842830U (en) | 2020-11-10 | 2020-11-10 | Anti-eccentricity device for indoor rock anchoring experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022583663.4U CN213842830U (en) | 2020-11-10 | 2020-11-10 | Anti-eccentricity device for indoor rock anchoring experiment |
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| CN213842830U true CN213842830U (en) | 2021-07-30 |
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| CN202022583663.4U Active CN213842830U (en) | 2020-11-10 | 2020-11-10 | Anti-eccentricity device for indoor rock anchoring experiment |
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