CN212614602U - Ground stress testing device - Google Patents

Abstract

The utility model relates to a ground stress testing arrangement, it includes the rock core pipe, and the one end of rock core pipe is provided with orders about its pivoted power unit, and the other end is provided with the drill bit, and the one end of rock core pipe towards power unit is the blind end, and the rock core is intraductal coaxial to be provided with the guide arm, and the one end rigid coupling of guide arm is at the blind end of rock core pipe, and the other end passes the drill bit and stretches out the drill bit. The utility model has the advantages that when the core is got to the cover, make things convenient for the staff to order about drill bit and measuring orifice and set up with one heart.

Description

Ground stress testing device

Technical Field

The utility model relates to a geology check out test set especially relates to a ground stress test device.

Background

For geotechnical engineering and mining engineering, the ground stress is a fundamental power source causing deformation and damage of tunnel surrounding rocks, support failure and power generation phenomena, and among many factors influencing the stability of the tunnel surrounding rocks, the high ground stress is one of the most main and fundamental factors.

The existing ground stress actual measurement methods are many, but the more common methods can be summarized into three types, mainly comprising a stress relief method, a hydraulic fracturing method and a stress recovery method. The currently widely applied method is a sleeve core stress relief method. Specifically, the method is that a measuring hole is drilled in the rock, a stress sensor is installed in the measuring hole and is used for observing and reading, then a rock core is concentrically sleeved outside the measuring hole, the rock core is separated from surrounding rock, the stress on the rock core is recovered due to the release, and the magnitude and the direction of the stress can be calculated according to the difference measured by an instrument before and after the stress is released. When a rock core is sleeved and taken, a rock core pipe is often used, an annular drill bit is coaxially and fixedly connected to one end face of the rock core pipe, a power unit is arranged on the other end face of the rock core pipe, and the output shaft end of the power unit is coaxially and fixedly connected with the rock core pipe.

The above prior art solutions have the following drawbacks; before the core is extracted, the drill bit and the measuring hole are concentrically arranged by a precursor, and the operation is usually adjusted by a worker according to experience, so that a large error exists, and the ground stress is not accurately tested.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a ground stress test device, its advantage is when the core is got to the cover, makes things convenient for the staff to order about drill bit and measuring orifice and sets up with one heart.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides a ground stress testing arrangement, includes the core barrel, and the one end of core barrel is provided with orders about its pivoted power unit, and the other end is provided with the drill bit, the core barrel is the blind end towards the one end of power unit, and the intraductal coaxial guide arm that is provided with of core barrel, the one end rigid coupling of guide arm are at the blind end of core barrel, and the other end passes the drill bit and stretches out the drill bit.

Through adopting above-mentioned technical scheme, when the staff need set the core, pioneer made the guide arm keep away from the one end of power unit and inserted in the measuring hole, then the drill bit supports and leans on the rock mass to make core pipe and measuring hole be in concentric setting, and then start power unit, order about core pipe and drill bit and take place to rotate, and then squeeze into the rock mass with the core pipe, the rock mass among the core pipe forms the core, make core and measuring hole keep better concentric state, improve the accuracy of ground stress test.

The utility model discloses can further configure into: the rock core pipe is internally provided with a supporting piece for supporting the guide rod, the supporting piece comprises a first supporting ring sleeved on the guide rod and a second supporting ring tightly attached to the inner circumferential surface of the rock core pipe, the outer circumferential surface of the first supporting ring is fixedly connected with a plurality of connecting rods, and one end, far away from the first supporting ring, of each connecting rod is fixedly connected to the second supporting ring.

Through adopting above-mentioned technical scheme, the connecting rod makes the rigidity between first support ring and the second support ring, again because the second support ring hugs closely on the inner wall of core barrel for first support ring plays the firm effect of support to the guide arm, reduces the disturbance degree deformation of guide arm, and the initial position of support piece is close to the one end that the power unit was kept away from to the guide arm, and the in-process of rock mass is squeezed into to the core barrel is got in the suit, and support piece receives blockking of rock mass, makes support piece remove towards the direction of being close to the power unit.

The utility model discloses can further configure into: a spiral connecting rope sleeved on the guide rod is arranged between the closed end of the core barrel and the supporting piece, and two ends of the connecting rope are fixedly connected to the closed end of the core barrel and the supporting piece respectively.

Through adopting above-mentioned technical scheme, restriction support piece breaks away from the guide arm, connects the rope and becomes the heliciform for connecting the rope and having flexible elasticity, connecting the rope when the compression, connecting the rope and still can keeping comparatively regular state.

The utility model discloses can further configure into: the guide arm includes the dead lever of rigid coupling on the rock core pipe blind end and the carriage release lever of the coaxial setting of dead lever, and the length sum of carriage release lever and dead lever equals the length sum of rock core pipe and drill bit, and the rigid coupling has the inserted bar on the terminal surface of dead lever, has seted up on the terminal surface of dead lever and has supplied inserted bar male spout, is provided with in the spout and orders about the inserted bar towards keeping away from the gliding coupling spring of direction of slot.

Through adopting above-mentioned technical scheme, when connecting spring is in the natural state, there is the clearance between the relative terminal surface of carriage release lever and dead lever, the one end that the dead lever was kept away from to the carriage release lever this moment stretches out in the drill bit, the staff can keep away from the one end of dead lever with the carriage release lever and insert in the measuring hole, at the in-process of cover getting the core, the one end that the dead lever was kept away from to the carriage release lever is contradicted with the diapire of measuring hole at first, along with the core pipe continues to squeeze into in the rock body, can make the carriage release lever be close to each other with the relative terminal surface of dead lever, it is inconsistent to reach carriage release lever and dead lever, thereby it continues to squeeze into in the rock body to have restricted the core pipe, thereby make the.

The utility model discloses can further configure into: the end face of the movable rod facing the fixed rod is fixedly connected with a sliding rod, and the end face of the fixed rod is provided with a slot for inserting the sliding rod.

Through adopting above-mentioned technical scheme, support the carriage release lever jointly through slide bar and inserted bar for the removal process of carriage release lever is more stable.

The utility model discloses can further configure into: the drill bit is equipped with on the drill bit's of rock core pipe orientation terminal surface on a plurality of buckles of establishing with the drill bit card and being connected, offers on the drill bit orientation rock core pipe's the terminal surface to be used for holding the buckle and establish with the mutual card of buckle draw-in groove.

Through adopting above-mentioned technical scheme, the setting of buckle and draw-in groove for the drill bit is connected firmly with the rock core pipe, and the staff's of being convenient for drill bit dismantles.

The utility model discloses can further configure into: the buckle includes that the rigid coupling inserts the post and the grafting ball of rigid coupling at inserting the post tip on the terminal surface of core tube orientation drill bit one end, and the draw-in groove is established including the card and is being slided the groove and with the ball groove that slides the groove and communicate mutually on the terminal surface of core tube orientation drill bit.

Through adopting above-mentioned technical scheme, when the relative terminal surface counterbalance of rock core pipe and drill bit leaned on together, the grafting ball inserted into the inslot that slides through self elastic deformation, then the grafting ball enters into the ball groove and original volume of elastic recovery for the grafting ball pastes and leans on the ball groove inner wall, and the card is established in the ball groove, makes drill bit and rock core pipe be connected firmly.

The utility model discloses can further configure into: the drill bit has the insert ring towards the coaxial rigid coupling of the terminal surface of rock core pipe, and the rock core pipe has been offered towards the terminal surface of drill bit and has been supplied to insert ring male holding tank, and insert the ring and equal with the internal diameter of rock core pipe, and the rigid coupling has the card strip of arranging along the axis direction of inserting the ring on the outer peripheral face of inserting the ring, offers on the lateral wall of holding tank and supplies card strip male recess.

Through adopting above-mentioned technical scheme, when the rock core pipe drove the drill bit and takes place to rotate, the rock core pipe can transmit bigger torsional force for the drill bit to make the rock core pipe change and squeeze into in the rock body.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the end part of the guide rod is driven to be inserted into the measuring hole through the rock core pipe, the drill bit, the power unit and the guide rod, and the drill bit and the measuring hole can be kept in good concentricity when the drill bit is abutted against the rock body, so that when the rock core is sleeved, a worker can conveniently drive the drill bit and the measuring hole to be concentrically arranged, the sleeved rock core and the measuring hole are concentric, and the accuracy of the ground stress test is improved;

2. through first support ring, second support ring, connecting plate, the connecting rod makes the position between first support ring and the second support ring fixed, again because the second support ring hugs closely on the inner wall of rock core pipe for first support ring plays the firm effect of support to the guide arm, reduces the degree deformation of guide arm.

Drawings

Fig. 1 is a schematic overall structure diagram of a ground stress testing device.

Figure 2 is a cross-sectional view of a core barrel.

Fig. 3 is a schematic view of a connection structure of a drill bit and a core barrel.

Fig. 4 is a sectional view of the fixing lever.

Figure 5 is an exploded view of a core barrel and drill bit.

In the figure, 1, a core barrel; 11. buckling; 111. inserting a column; 112. inserting and connecting a ball; 12. accommodating grooves; 13. a groove; 2. a drill bit; 21. a card slot; 211. a sliding groove; 212. a ball groove; 22. inserting a ring; 23. clamping the strip; 3. a power unit; 4. a guide bar; 41. fixing the rod; 42. a travel bar; 43. inserting a rod; 44. a chute; 45. a connecting spring; 46. a slide bar; 47. a slot; 5. a support member; 51. a first support ring; 52. a second support ring; 53. a connecting rod; 54. and connecting ropes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a ground stress testing arrangement, including core barrel 1, the coaxial annular drill bit 2 that is provided with of a terminal surface of core barrel 1, be provided with on another terminal surface and be used for ordering about core barrel 1 pivoted power unit 3, core barrel 1 is on power unit 3's output shaft for blind end and coaxial rigid coupling towards power unit 3's one end, be provided with in the core barrel 1 rather than coaxial setting and be used for inserting the guide arm 4 in the measuring aperture, the one end rigid coupling of guide arm 4 is at the blind end of core barrel 1, the other end passes drill bit 2 and stretches out in drill bit 2.

When the staff need set the core, pioneer makes guide arm 4 keep away from the one end of power unit 3 and inserts in the measuring hole, then drill bit 2 supports and leans on the rock mass to make core pipe 1 and measuring hole be in concentric setting, and then start power unit 3, order about core pipe 1 and drill bit 2 and take place to rotate, and then squeeze into the rock mass with core pipe 1, the rock mass in the core pipe 1 forms the core, make core and measuring hole keep better concentric state, improve the accuracy of ground stress test.

Referring to fig. 2 and 3, since the guide rod 4 is relatively slender, so that one end of the guide rod 4 away from the power unit 3 is subjected to deflection deformation, a support member 5 for supporting the guide rod 4 is arranged in the core barrel 1, the support member 5 comprises a first support ring 51 sleeved on the guide rod 4 and a second support ring 52 concentrically arranged with the first support ring 51, the outer circumferential surface of the second support ring 52 is tightly attached to the inner circumferential surface of the core barrel 1, the outer circumferential surface of the first support ring 51 is vertically and fixedly connected with a plurality of connecting rods 53, the plurality of connecting rods 53 are circumferentially distributed around the axis of the first support ring 51 at equal intervals, and one end of the connecting rod 53 away from the first support ring 51 is fixedly connected to the inner circumferential surface of the second support ring 52.

Make the position between first support ring 51 and the second support ring 52 fixed through connecting rod 53, again because second support ring 52 hugs closely on the inner wall of core barrel 1 for first support ring 51 plays the firm effect of support to guide arm 4, the initial position of support piece 5 is close to the one end that power unit 3 was kept away from to guide arm 4, the in-process of getting core barrel 1 and driving into the rock mass, support piece 5 receives blockking of rock mass, makes support piece 5 remove towards the direction that is close to power unit 3.

Referring to fig. 2, in order to prevent the support member 5 from being separated from the guide rod 4, a spiral connecting rope 54 is disposed between the closed end of the core barrel 1 and the support member 5, the connecting rope 54 is sleeved on the guide rod 4, one end of the connecting rope 54 is fixedly connected to the support member 5, and the other end is fixedly connected to the closed end of the core barrel 1.

Referring to fig. 2 and 4, in order to make the length of the core equal to the depth of the measuring hole after the core is extracted, the guide rod 4 includes a fixed rod 41 fixed to the closed end of the core barrel 1 and a movable rod 42 coaxially disposed with the fixed rod 41, the sum of the lengths of the movable rod 42 and the fixed rod 41 is equal to the sum of the lengths of the core barrel 1 and the drill bit 2, the diameter of the end surface of the movable rod 42 is equal to that of the end surface of the fixed rod 41, an insertion rod 43 arranged along the axial direction of the movable rod 42 is fixedly connected to one end of the movable rod 42 facing the fixed rod 41, a sliding groove 44 for inserting the insertion rod 43 is arranged on the end surface of the fixed rod 41, the movable rod 42 is connected with the fixed rod 41 in a sliding manner, a connecting spring 45 for driving the insertion rod 43 to slide towards a direction away from the slot 47 is arranged in the sliding groove 44, one end of the connecting spring 45 is fixedly connected to the bottom of the sliding groove 44, and the other end of the connecting spring is fixedly connected to the end face, away from the movable rod 42, of the insertion rod 43.

When the connecting spring 45 is in a natural state, a gap exists between the end faces of the movable rod 42 opposite to the fixed rod 41, at the moment, one end, far away from the fixed rod 41, of the movable rod 42 extends out of the drill bit 2, a worker can insert one end, far away from the fixed rod 41, of the movable rod 42 into the measuring hole, in the process of sleeving the rock core, one end, far away from the fixed rod 41, of the movable rod 42 is firstly abutted against the bottom wall of the measuring hole, along with the fact that the rock core pipe 1 is continuously driven into the rock body, the end faces, opposite to the movable rod 42 and the fixed rod 41, are enabled to be close to each other until the movable rod 42 is abutted against the fixed rod 41, and therefore the rock core pipe 1 is prevented from being continuously driven into the rock body, the length of the rock core.

Referring to fig. 4, in order to make the movable rod 42 slide on the fixed rod 41 more stably, a plurality of sliding rods 46 are fixedly connected to an end surface of the movable rod 42 facing the fixed rod 41, the sliding rods 46 are circumferentially arranged at equal intervals around an axis of the movable rod 42, and an insertion slot 47 into which the sliding rod 46 is inserted is formed in the end surface of the fixed rod 41, so that the movable rod 42 is supported by the sliding rods 46 together, and the moving process of the movable rod 42 is made more stable.

Referring to fig. 3, after the drill bit 2 is used for a long time, it may be relatively seriously worn, and in order to facilitate the replacement of the drill bit 2 by the worker, the drill bit 2 may be detachably connected to the core barrel 1, the end surface of the core barrel 1 facing the drill bit 2 is fixedly connected with a plurality of buckles 11 connected to the drill bit 2, each buckle 11 includes an insertion pillar 111 fixedly connected to the end surface of the core barrel 1 facing one end of the drill bit 2 and an elastic insertion ball 112 fixedly connected to the end of the insertion pillar 111, the end surface of the drill bit 2 facing the core barrel 1 is provided with a clamping groove 21 for accommodating the buckle 11 and mutually clamping the buckle 11, the clamping groove 21 includes a sliding groove 211 clamped to the end surface of the drill bit 2 facing the core barrel 1 and a ball groove 212 communicated with the sliding groove 211, and the diameter of the insertion ball 112 is greater than the diameter. When the rock core pipe 1 leans against the end face opposite to the drill bit 2, the inserting ball 112 is inserted into the sliding groove 211 through elastic deformation of the inserting ball 112, then the inserting ball 112 enters the ball groove 212 and elastically restores the original volume, so that the inserting ball 112 is attached to the inner wall of the ball groove 212 and clamped in the ball groove 212, the buckle 11 and the clamping groove 21 are arranged, the drill bit 2 is stably connected with the rock core pipe 1, and the drill bit 2 is convenient to disassemble.

Referring to fig. 3 and 5, an insertion ring 22 is coaxially and fixedly connected to the end surface of the drill bit 2 facing the core barrel 1, an accommodating groove 12 for the insertion ring 22 to be inserted into is formed in the end surface of the core barrel 1 facing the drill bit 2, the inner diameter of the insertion ring 22 is equal to that of the core barrel 1, a plurality of clamping strips 23 which are circumferentially distributed around the axis of the insertion ring 22 at equal intervals are fixedly connected to the outer peripheral surface of the insertion ring 22, the clamping strips 23 are arranged along the axis direction of the insertion ring 22, and a groove 13 for the clamping strips 23 to be inserted into is formed in the side wall of the; therefore, when the rock core tube 1 drives the drill bit 2 to rotate, the rock core tube 1 can transmit larger torsional force to the drill bit 2, so that the rock core tube 1 can be more easily driven into a rock body.

The implementation principle of the embodiment is as follows: when the staff need set the core, pioneer makes the movable rod 42 keep away from the one end of dead lever 41 and inserts in the measuring hole, then drill bit 2 supports and leans on the rock mass, thereby make core pipe 1 and measuring hole be in concentric setting, and then start power unit 3, order about core pipe 1 and drill bit 2 and take place to rotate, and then squeeze into the rock mass with core pipe 1, at the in-process of set core, the one end that fixed lever 41 was kept away from to movable rod 42 is contradicted with the diapire of measuring hole at first, continue to squeeze into the rock mass along with core pipe 1, can make movable rod 42 and the relative terminal surface of dead lever 41 be close to each other, it is inconsistent with dead lever 41 to reach movable rod 42, thereby it continues to squeeze into the rock mass to have restricted core pipe 1.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a ground stress testing arrangement, includes core pipe (1), and the one end of core pipe (1) is provided with drives about its pivoted power unit (3), and the other end is provided with drill bit (2), its characterized in that: the one end of core barrel (1) orientation power unit (3) is the blind end, and the coaxial guide arm (4) that is provided with in core barrel (1), the blind end at core barrel (1) of one end rigid coupling of guide arm (4), the other end pass drill bit (2) and stretch out drill bit (2).

2. The ground stress testing device of claim 1, wherein: be provided with in core barrel (1) and carry out support piece (5) that support to guide arm (4), support piece (5) establish first support ring (51) and hug closely second support ring (52) on core barrel (1) inner peripheral surface at guide arm (4) including the cover, the outer peripheral face rigid coupling of first support ring (51) has a plurality of connecting rods (53), and the one end rigid coupling that first support ring (51) was kept away from in connecting rod (53) is on second support ring (52).

3. The ground stress testing device of claim 2, wherein: spiral connecting ropes (54) sleeved on the guide rod (4) are arranged between the closed end of the rock core pipe (1) and the supporting piece (5), and two ends of each connecting rope (54) are fixedly connected to the closed end of the rock core pipe (1) and the supporting piece (5) respectively.

4. The ground stress testing device of claim 1, wherein: guide arm (4) are including dead lever (41) of rigid coupling on core barrel (1) closed end and with dead lever (41) coaxial setting's carriage release lever (42), the length sum of carriage release lever (42) and dead lever (41) equals the length sum of core barrel (1) and drill bit (2), the rigid coupling has inserted bar (43) on the terminal surface of carriage release lever (42) orientation dead lever (41), offer on the terminal surface of dead lever (41) and supply inserted bar (43) male spout (44), be provided with in spout (44) and order about inserted bar (43) towards keeping away from the gliding connecting spring (45) of direction of slot (47).

5. The ground stress testing device of claim 4, wherein: the end face of the movable rod (42) facing the fixed rod (41) is fixedly connected with a sliding rod (46), and the end face of the fixed rod (41) is provided with a slot (47) for inserting the sliding rod (46).

6. The ground stress testing device of claim 1, wherein: rock core pipe (1) rigid coupling has a plurality of buckles (11) of establishing the connection with drill bit (2) card on the terminal surface towards drill bit (2), offers on drill bit (2) the terminal surface towards rock core pipe (1) to be used for holding buckle (11) and with buckle (11) each other card draw-in groove (21) of establishing.

7. A ground stress testing device according to claim 6, wherein: buckle (11) are including inserting post (111) and rigid coupling in inserting ball (112) of post (111) tip at the terminal surface of core barrel (1) orientation drill bit (2) one end of rigid coupling, draw-in groove (21) including the card establish drill bit (2) towards sliding groove (211) on the terminal surface of core barrel (1) and ball groove (212) that are linked together with sliding groove (211).

8. The ground stress testing device of claim 7, wherein: drill bit (2) have towards the coaxial rigid coupling of terminal surface of core barrel (1) and insert ring (22), and core barrel (1) has been offered towards the terminal surface of drill bit (2) and has been supplied to insert ring (22) male holding tank (12), and the internal diameter of inserting ring (22) and core barrel (1) equals, and the rigid coupling has card strip (23) of arranging along the axis direction of inserting ring (22) on the outer peripheral face of inserting ring (22), has seted up on the lateral wall of holding tank (12) and has supplied card strip (23) male recess (13).

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