Anchor rod drawing assembly

Abstract

The utility model provides an anchor rod drawing assembly. The anchor rod drawing assembly comprises a center hole jack applied to an anchor cable drawing instrument, a stress dispersing device, a connecting sleeve, a fixing sleeve and a connecting rod. One end of the anchor rod is detachably connected with the connecting sleeve, one end of the connecting rod is detachably connected with the connecting sleeve, the other end of the connecting rod sequentially penetrates through the stress dispersing device and the bottom end of the center hole jack and extends out of the front end of the center hole jack, and the fixing sleeve is detachably connected to the other end of the connecting rod and abuts against the front end of the center hole jack. The bottom end of the center hole jack abuts against the stress dispersion device, and the stress dispersion device abuts against the surrounding rock where the anchor rod is located. According to the application, the error of the drawing result caused by the interfacial shear stress concentration effect is effectively reduced through the stress dispersion device; by applying the connecting rod, the connecting sleeve, the fixing sleeve and the like, the center hole jack which is only suitable for anchor cable drawing originally can also be used for anchor rod drawing, site construction equipment is simplified, and testing cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel engineering technical field especially relates to a kind of anchor rod pull-out assembly. BACKGROUND

[0002] In tunnel engineering, due to the stress release caused by excavation to surrounding rock, it is often necessary to apply anchor cable and anchor rod to reinforce the surrounding rock, and reasonable evaluation of the pull-out performance of anchor cable and anchor rod becomes the key to designing anchoring support parameters, but the existing test method has the following shortcomings. On the one hand, the on-site pull-out test is often used to evaluate the supporting effect of anchor cable / anchor rod. When pulling out, the jack is directly applied to the anchor disc or the surface of the surrounding rock to exert force until the anchor cable / anchor rod is pulled out. This test method will cause obvious stress concentration in the surrounding rock near the anchor cable / anchor rod, thus causing the anchoring interface to be more prone to progressive failure, and the resulting results will underestimate the bearing capacity of the anchor cable / anchor rod. On the other hand, since the anchor cable is made of multiple steel strands, its surface is not threaded, while the anchor rod is usually made of hollow threaded steel, and its surface has a threaded structure. Therefore, the existing pull-out equipment for anchor cable and anchor rod is significantly different and cannot be used universally, which brings great inconvenience to the on-site pull-out test of anchor cable and anchor rod and increases the construction cost.

[0003] That is, how to provide an anchor rod pull-out assembly to apply the equipment used for anchor cable pull-out to anchor rod pull-out to achieve the technical effects of reasonable evaluation of anchoring support effect and reduction of construction cost is a technical problem that needs to be solved in the field. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the utility model aims to provide an anchor rod pull-out assembly to solve at least one of the above technical problems.

[0005] The utility model provides an anchor rod pull-out assembly, which comprises:

[0006] a through-jack, a stress dispersion device, a connecting sleeve, a fixing sleeve and a connecting rod applied to an anchor cable pull-out instrument;

[0007] One end of the anchor rod is detachably connected to the connecting sleeve, one end of the connecting rod is detachably connected to the connecting sleeve, the other end of the connecting rod passes through the bottom end of the through-jack in sequence and extends out from the front end of the through-jack, the fixing sleeve is detachably connected to the other end of the connecting rod and abuts against the front end of the through-jack, the bottom end of the through-jack abuts against the stress dispersion device, and the stress dispersion device abuts against the surrounding rock where the anchor rod is located.

[0008] Preferably, the stress dispersion device comprises:

[0009] The bottom of the barrel is open, and an outer wall of the bottom of the barrel is provided with a connecting groove, and a top of the connecting groove is provided with a clamping groove, and a top of the barrel is provided with a middle through hole;

[0010] The top of the annular ring is provided with a clamping protrusion which is matched with the clamping groove, and the annular ring is detachably connected to the connecting groove of the barrel.

[0011] The bottom of the annular ring is in abutment with the surrounding rock, the bottom end of the through core jack is in abutment with the top of the barrel, and the other end of the connecting rod passes through the middle through hole, the bottom end of the through core jack and then extends out from the front end of the through core jack.

[0012] Preferably, an inner wall of the connecting sleeve is provided with a first inner thread structure and a second inner thread structure, the first inner thread structure is matched with the outer thread structure of the anchor rod, and the second inner thread structure is matched with the outer thread structure of the connecting rod.

[0013] Preferably, an inner wall of the fixed sleeve is provided with the second inner thread structure.

[0014] Preferably, the through core jack is provided with an anchor cable clamp embedding area for connecting an anchor cable clamp to form the anchor cable pullout apparatus.

[0015] Preferably, the connecting rod is made of high-strength steel material.

[0016] Preferably, the stress dispersion device is made of high-strength steel material.

[0017] Preferably, the height of the barrel is 100mm-200mm, the inner diameter of the barrel is 100mm-120mm, the width of the connecting groove is not less than 5mm, and the outer diameter of the annular ring is 300mm-500mm.

[0018] Preferably, the thickness of the barrel and the annular ring is not less than 25mm and not more than 30mm.

[0019] Preferably, the height of the connecting sleeve is 50mm-100mm.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] Specifically, the anchor rod pulling assembly comprises a through jack applied to an anchor cable pulling instrument, a stress dispersion device, a connecting sleeve, a fixing sleeve and a connecting rod.

[0022] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, can be implemented according to the content of the specification, and in order to let the above and other purposes, characteristics and advantages of the utility model can be more obvious and easy to understand, the specific implementation of the utility model is as follows. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiment or prior art of the present specification, the drawings needed in the embodiment will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of these drawings.

[0024] Figure 1 It is the anchor rod pulling assembly for the on-site pulling of anchor rod in the embodiment of the present application;

[0025] Figure 2 It is the cross-sectional view of the stress dispersion device in the embodiment of the present application;

[0026] Figure 3 It is the cross-sectional view of the connecting sleeve in the embodiment of the present application;

[0027] Figure 4 It is the cross-sectional view of the fixing sleeve in the embodiment of the present application;

[0028] Figure 5FIG. 1 is a sectional view of an anchor cable pull-out instrument in the embodiments of the present application;

[0029] Figure 6 FIG. 2 is a schematic diagram of the anchor cable pull-out instrument in the embodiments of the present application for on-site pulling of an anchor cable.

[0030] Reference signs:

[0031] 1, a through jack;

[0032] 2, a stress dispersion device;

[0033] 21, a barrel;

[0034] 211, a connecting groove;

[0035] 212, an intermediate through hole;

[0036] 22, a circular ring;

[0037] 221, a clamping protrusion;

[0038] 3, a connecting sleeve;

[0039] 31, a first internal thread structure;

[0040] 32, a second internal thread structure;

[0041] 4, a fixing sleeve;

[0042] 5, a connecting rod;

[0043] 6, an anchor cable pull-out instrument;

[0044] 7, an anchor rod;

[0045] 8, an anchor cable;

[0046] 9, surrounding rock;

[0047] 10, an anchor cable clamp. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application; wherein the keyword "and / or" involved in the embodiments of the present application represents two cases of and or, in other words, A and / or B mentioned in the embodiments of the present application represents two cases of A and B, A or B, which describes three states of A and B, such as A and / or B, which means only including A and not including B; only including B and not including A; including A and B.

[0049] Meanwhile, in the embodiments of the present specification, when one component is considered to be "connected" to another component, it can be directly connected to the other component or a middle component can be present at the same time. When one component is considered to be "disposed on" another component, it can be directly disposed on the other component or a middle component can be present at the same time.

[0050] The embodiments of the present application will be described in detail below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present specification. The present application can also be implemented or applied in other different specific embodiments, and each detail in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application.

[0051] Embodiment one

[0052] Please refer to Figures 1-3 , specifically, in the embodiment of the anchor rod 7 pulling assembly, the anchor rod 7 pulling assembly provided by the present application specifically comprises: a through-hole jack 1 applied to an anchor cable pulling instrument 6, a stress dispersion device 2, a connecting sleeve 3, a fixing sleeve 4 and a connecting rod 5; wherein one end of the anchor rod 7 is detachably connected with the connecting sleeve 3, one end of the connecting rod 5 is detachably connected with the connecting sleeve 3, the other end of the connecting rod 5 passes through the bottom end of the through-hole jack 1 in sequence and extends out from the front end of the through-hole jack 1, the fixing sleeve 4 is detachably connected with the other end of the connecting rod 5 and abuts against the front end of the through-hole jack 1, the bottom end of the through-hole jack 1 abuts against the stress dispersion device 2, and the stress dispersion device 2 abuts against the surrounding rock 9 where the anchor rod 7 is located.

[0053] Specifically, the utility model discloses an anchor rod 7 drawing assembly, comprising: the application in the anchor cable drawbench 6 of the through core jack 1, stress dispersion device 2, connecting sleeve 3, fixed sleeve 4 and connecting rod 5, wherein, one end of anchor rod 7 is detachably connected with connecting sleeve 3, one end of connecting rod 5 is detachably connected with connecting sleeve 3, the other end of connecting rod 5 passes through stress dispersion device 2, the bottom end of through core jack 1 in proper order and stretches out from the front end of through core jack 1, fixed sleeve 4 is detachably connected with the other end of connecting rod 5 and is in abutment with the front end of through core jack 1, the bottom end of through core jack 1 is in abutment with stress dispersion device 2, and stress dispersion device 2 is in abutment with the surrounding rock 9 where anchor rod 7 is located. The stress dispersion device 2 is arranged in the embodiment of the application, the reaction force originally acting on the anchor rod 7 drilling hole orifice is dispersed to the outside surrounding rock 9, the anchor rod 7 anchoring interface shear stress concentration at the orifice is reduced, the error caused by the interface shear stress concentration effect to the drawing result can be effectively reduced, and the obtained drawing test result is closer to the actual situation. By applying connecting rod 5, connecting sleeve 3, fixed sleeve 4 and exchanging jack use direction, the through core jack 1 of the anchor cable drawbench 6 originally only applicable to the drawing of anchor cable 8 can also be used for the drawing of anchor rod 7, the on-site construction equipment is simplified, the use of the equipment is enriched, the test cost is saved, and it has important significance for the rapid evaluation of the drawing performance of the anchor cable 8 and anchor rod 7.

[0054] In one possible implementation, as shown in Figure 2 The stress dispersion device 2 includes a cylinder 21 and a circular ring. The bottom of the cylinder 21 is open. A connecting groove 211 is arranged on the outer wall of the bottom of the cylinder 21. A clamping groove is arranged on the top of the connecting groove 211. An intermediate through hole 212 is arranged on the top of the cylinder 21. The top of the circular ring is provided with a clamping protrusion 221, which is matched with the clamping groove. The circular ring is detachably connected to the connecting groove 211 of the cylinder 21. The bottom of the circular ring is in abutment with the surrounding rock 9. The bottom end of the through core jack 1 is in abutment with the top of the cylinder 21. The other end of the connecting rod 5 passes through the intermediate through hole 212 and the bottom end of the through core jack 1, and then extends out from the front end of the through core jack 1.

[0055] Specifically, the stress dispersion device 2 is composed of the hollow cylinder 21 and the circular ring at the bottom, and the two are detachably fixedly connected through the clamping protrusion 221 and the clamping groove. The stress dispersion device 2 is convenient to carry and has the advantages of simple disassembly and assembly.

[0056] In a possible implementation, the height of the cavity of the barrel 21 can be set to 100mm-200mm, the inner diameter of the barrel 21 can be set to 100mm-120mm, the width of the connecting groove 211 can be set to not less than 5mm, and the outer diameter of the circular ring can be set to 300mm-500mm; the thickness of the barrel 21 and the circular ring can be set to not less than 25mm and not more than 30mm; and the height of the connecting sleeve 3 can be set to 50mm-100mm.

[0057] Specifically, the height of the cavity in the barrel 21 is set to 100mm-200mm, the height of the connecting sleeve 3 is set to 50mm-100mm, the height of the cavity in the barrel 21 is at least 50mm higher than the height of the connecting sleeve 3, so as to reserve sufficient stretching displacement for pulling; the thickness of the barrel 21 and the circular ring is set to not less than 25mm and not more than 30mm, so as to meet the requirements of strength and portability; the inner diameter of the barrel 21 is set to 100mm-120mm, the width of the connecting groove 211 is set to not less than 5mm, and the outer diameter of the circular ring is set to 300mm-500mm, so as to effectively reduce the interface shear stress concentration effect and further ensure the stress dispersion effect.

[0058] In a possible implementation, as shown in Figure 3 the inner side wall of the connecting sleeve 3 is provided with a first inner thread structure 31 and a second inner thread structure 32, the first inner thread structure 31 is matched with the outer thread structure of the anchor rod 7, and the second inner thread structure 32 is matched with the outer thread structure of the connecting rod 5.

[0059] Specifically, the inside of the connecting sleeve 3 adopts a non-through thread structure, and the thread is divided into two parts, which are the first inner thread structure 31 and the second inner thread structure 32. The first inner thread structure 31 is matched with the outer thread of the anchor rod 7, and is used for being fastened with the anchor rod 7 through threads; the second inner thread structure 32 is matched with the outer thread of the connecting rod 5, and is used for being fastened with the connecting rod 5 through threads.

[0060] In a possible implementation, the inner side wall of the fixed sleeve 4 is provided with a second inner thread structure 32.

[0061] Specifically, as shown in Figure 4 the inside of the fixed sleeve 4 adopts a through thread structure, and is set as a second thread structure, which is used for being fastened with the connecting rod 5 through threads, so that the part of the connecting rod 5 that extends out of the front end of the through core jack 1 can be clamped to the front end of the jack through the fixed sleeve 4.

[0062] In a possible implementation, the connecting rod 5 is a solid rod with threads on the surface, and the connecting rod 5 and the stress dispersion device 2 are both made of high-strength steel material, so as to provide sufficient strength and rigidity.

[0063] In a possible implementation, the anchor cable clamp 10 embedding area is arranged in the through-jack 1, and the anchor cable clamp 10 embedding area is used to connect the anchor cable clamp 10 to form the anchor cable pullout apparatus 6.

[0064] Since the existing anchor cable 8 and anchor rod 7 pulling apparatus (pullout apparatus) are obviously different and cannot be used universally, that is, the anchor cable pullout apparatus 6 used for pulling the anchor cable 8 is difficult to be directly used for pulling the anchor rod 7. In view of this, the through-jack 1 of the anchor cable pullout apparatus 6 used for pulling the anchor cable 8 is applied to pull the anchor rod 7, so as to reduce the construction cost.

[0065] Specifically, when the anchor rod 7 is pulled, the anchor cable clamp 10 in the anchor cable pullout apparatus 6 is removed to obtain the through-jack 1 involved in the present application, that is, the through-jack 1 used for pulling the anchor cable 8 is used for pulling the anchor rod 7. Before the anchor rod 7 is pulled, the anchor rod 7 can be processed first, such as being cut off so that the length of the anchor rod 7 extending out of the surrounding rock 9 meets the length requirement of the anchor rod 7 pulling. When the anchor rod 7 is pulled, the connecting rod 5 can be connected with the anchor rod 7 through the communication sleeve, then the connecting rod 5 passes through the middle through hole 212 of the stress dispersion device 2, passes through the through-jack 1, and is clamped to the front end of the through-jack 1 through the fixing sleeve 4, so that the fixing sleeve 4 abuts against the front end of the through-jack 1, and the bottom end of the through-jack 1 abuts against the stress dispersion device 2, so that when the through-jack 1 is jacked, that is, when the front end of the through-jack 1 is jacked out, the front end of the through-jack 1 jacks out the connecting rod 5 and the anchor rod 7 together through the fixing sleeve 4, so as to pull the anchor rod 7.

[0066] It can be understood that the through-jack 1 used in the present application is a product obtained after the anchor cable clamp 10 in the front clamping anchor cable pullout apparatus 6 is removed, because if the anchor cable pullout apparatus 6 is directly used for pulling the anchor rod 7, the anchor cable clamp 10 will be abraded and the service life will be shortened. Since the anchor cable clamp 10 in the existing anchor cable pullout apparatus 6 is detachably connected to the through-jack 1, when the anchor cable clamp 10 is applied to pull the anchor rod 7, the anchor cable clamp 10 needs to be removed to avoid damage to the anchor cable clamp 10. As shown in FIG. 2, it is a sectional view of the anchor cable pullout apparatus 6 installing the anchor cable clamp 10. Figure 5

[0067] The through-jack 1 of the present application in combination with the anchor cable clamp 10 and the stress dispersion device 2 can also realize pulling of the anchor cable 8, as shown in FIG. 3, which is a schematic view of the anchor cable 8 being pulled by the through-jack 1. Figure 6 ​As shown, the anchor cable 8 is detachably connected to the front end of the through-jack 1 by the anchor cable clamp 10 to form the anchor cable puller 6 for pulling the anchor cable 8, one end of the anchor cable 8 extending out of the surrounding rock 9 is sequentially threaded through the middle through hole 212 of the stress dispersion device 2, the front end of the anchor cable puller 6 and located in the through-jack 1, one end of the anchor cable 8 abuts against the anchor cable clamp 10 arranged in the through-jack 1, the circular ring of the stress dispersion device 2 abuts against the surrounding rock 9 where the anchor cable 8 is located, the front end of the anchor cable puller 6 abuts against the barrel 21 of the stress dispersion device 2, when the through-jack 1 is jacked, the anchor cable clamp 10 is tightly engaged with the anchor cable 8, and the front end of the through-jack 1 is jacked out and acts on the barrel 21 of the stress dispersion device 2 to reversely push the anchor cable 8 to pull.

[0068] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and do not have technical significance to limit the implementation of the present application. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the disclosed technical content. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the present specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the implementation of the present application.

[0069] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, but any simple modification, equivalent change and modification of the above embodiment, without departing from the technical content of the present application, according to the technical essence of the present application, are still within the scope of the present application.

Claims

1. An anchor rod pullout assembly, characterized by, The anchor rod pulling assembly comprises: The through-hole jack, stress dispersion device, connecting sleeve, fixing sleeve and connecting rod applied to the anchor cable pulling instrument; One end of the anchor rod is detachably connected with the connecting sleeve, one end of the connecting rod is detachably connected with the connecting sleeve, the other end of the connecting rod passes through the bottom end of the through-hole jack in sequence and extends out from the front end of the through-hole jack, the fixing sleeve is detachably connected with the other end of the connecting rod and abuts against the front end of the through-hole jack, the bottom end of the through-hole jack abuts against the stress dispersion device, and the stress dispersion device abuts against the surrounding rock where the anchor rod is located.

2. An anchor rod puller assembly as claimed in claim 1 wherein, The stress dispersion device comprises: The bottom of the barrel is open, an outer wall of the bottom of the barrel is provided with a connecting groove, the top of the connecting groove is provided with a clamping groove, and a middle through hole is formed in the top of the barrel; The top of the circular ring is provided with a clamping protrusion matched with the clamping groove, and the circular ring is detachably connected to the connecting groove of the barrel; The bottom of the circular ring abuts against the surrounding rock, the bottom end of the through-hole jack abuts against the top of the barrel, and the other end of the connecting rod passes through the middle through hole and the bottom end of the through-hole jack in sequence and extends out from the front end of the through-hole jack.

3. The anchor rod pulling assembly according to claim 2, wherein: The inner wall of the connecting sleeve is provided with a first inner thread structure matched with the outer thread structure of the anchor rod and a second inner thread structure matched with the outer thread structure of the connecting rod.

4. The anchor rod pulling assembly according to claim 3, wherein: The inner wall of the fixing sleeve is provided with the second inner thread structure.

5. The anchor rod pulling assembly according to claim 4, wherein: The through-hole jack is internally provided with an anchor cable clamp embedding area for connecting an anchor cable clamp to form the anchor cable pulling instrument.

6. The anchor rod pulling assembly according to claim 5, wherein: The connecting rod is made of high-strength steel material.

7. The anchor rod pulling assembly according to claim 6, wherein: The stress dispersion device is made of high-strength steel material.

8. The anchor rod pulling assembly according to claim 7, wherein: The height of the barrel is 100mm-200mm, the inner diameter of the barrel is 100mm-120mm, the width of the connecting groove is not less than 5mm, and the outer diameter of the circular ring is 300mm-500mm.

9. The anchor rod pulling assembly according to claim 8, wherein: The thickness of the barrel and the circular ring is not less than 25mm and not more than 30mm.

10. The anchor rod pulling assembly according to claim 9, wherein: The height of the connecting sleeve is 50mm-100mm.

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