Large-deformation self-adaptive anti-explosion anchor rod grouting device

Abstract

The utility model provides a large-deformation self-adaptation anti-explosion anchor rod grouting device which comprises a grout stopping plate, a grouting pipe and an exhaust pipe, the outer diameter of the grout stopping plate is matched with the hole diameter of surrounding rock, and a center hole of the grout stopping plate is arranged on an anchoring section of an anchor rod in a sleeved mode. The grouting pipe and the exhaust pipe are arranged in a cavity of an anchoring section, through holes for the grouting pipe and the exhaust pipe to penetrate through are formed in the grouting stopping plate, the through holes are matched with the hole diameter of the grouting pipe and the hole diameter of the exhaust pipe respectively, the grouting pipe is a seamless steel pipe and used for conveying high-pressure grout into the cavity of the anchoring section, and the exhaust pipe is a PVC pipe. The problem that grouting construction of the anchoring section of the large-deformation self-adaption anti-explosion anchor rod is difficult can be solved, the grouting construction method of the anchoring section can be well achieved by arranging the grout stopping plate, the grouting pipe, the grouting valve and the exhaust pipe at the front end of the sleeve, and the grouting device is convenient to construct, high in reliability, safe in operation, low in machining difficulty, low in construction cost, simple in assembly mode and suitable for large-deformation self-adaption anti-explosion anchor rod anchoring section grouting construction. And the construction progress is accelerated, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel excavation support construction technical field especially is related to a big deformation self -adaptation anti -blast anchor rod grouting device. BACKGROUND

[0002] When the surrounding rock produces big deformation because of geological disasters such as rock burst, soft rock etc. in underground big deformation rock mass tunnel, big deformation self -adaptation anti -blast anchor rod is often used in construction operation. The working principle of big deformation self -adaptation anti -blast anchor rod is that frictional slip deformation is generated between the anchor rod body friction head and the inner wall of the sleeve, thereby displacement is generated, and the energy generated by the surrounding rock cavity because of big deformation is released through displacement. When the surrounding rock deforms, the metal baffle is subjected to the outward thrust of the surrounding rock, which is greater than the static friction force between the big deformation self -adaptation anchor rod and the surrounding rock. Through such pressure release, the friction force of the sleeve and the anchor rod body friction head can be equal to the surrounding rock pressure again, and a new dynamic and static force balance state is reached.

[0003] However, grouting anchoring can only anchor the anchoring section, and the sleeve section cannot be grouted and anchored, otherwise it will affect the frictional slip deformation between the anchor rod body friction head and the inner wall of the sleeve, and the big deformation self -adaptation function cannot be realized. Therefore, when only the anchoring section is grouted and anchored, it is difficult to realize the construction method of ordinary anchor rods. The ordinary anchor rod grouting is to completely fill the space of the entire rod body. According to the feedback from the construction site, during grouting construction, the grouting machine connecting pipe is usually directly sleeved on the grouting pipe section, and needs to be held by workers. The sleeve joint often falls off, and high-pressure slurry is sprayed out, causing injury to workers. Therefore, it is necessary to develop an effective big deformation self -adaptation anti -blast anchor rod grouting device and construction method to solve the problem that big deformation self -adaptation anti -blast anchor rod grouting anchoring can only anchor the anchoring section, and the sleeve section cannot be grouted and anchored. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a big deformation self -adaptation anti -blast anchor rod grouting device, solving the problem of difficult anchoring section grouting construction, and providing a method for solving the anchoring section grouting construction, which is convenient to construct, has high reliability, is safe to operate, has low processing difficulty, simple assembly method, low construction cost, accelerates construction progress and has high comprehensive benefits.

[0005] According to the utility model, a big deformation self -adaptation anti -blast anchor rod grouting device is provided, which comprises a grouting stop plate, a grouting pipe and an exhaust pipe. The outer diameter of the grouting stop plate matches the surrounding rock aperture, and the central hole of the grouting stop plate is sleeved on the anchoring section of the anchor rod. A through hole is arranged on the grouting stop plate for the grouting pipe and the exhaust pipe to penetrate, and the through hole matches the aperture of the grouting pipe and the exhaust pipe. The grouting pipe is a seamless steel pipe, and is used for conveying high-pressure slurry into the cavity of the anchoring section. The exhaust pipe is a PVC pipe.

[0006] Further, the outer ring of the stop plate is provided with an elastic rubber sleeve.

[0007] Further, the grouting pipe is made of seamless steel pipe, and the outer end of the grouting pipe is provided with a screw thread, and the grouting pipe is connected with the grouting valve through the screw thread.

[0008] Further, the grouting valve is connected with the grouting machine through the connecting pipe of the grouting machine when grouting, so that no leakage or spouting occurs when the slurry is injected.

[0009] Further, the exhaust pipe is made of PVC pipe, and the exhaust pipe extends to the top end of the anchor rod and is used for indicating the filling state of the slurry.

[0010] Further, the inner diameter of the center hole of the stop plate matches the diameter of the anchor rod anchoring section, the inner diameter of the center hole of the stop plate is smaller than the inner diameter of the sleeve, and the stop plate offsets the pressure of the slurry through the pressure of the sleeve.

[0011] Further, the tail end of the sleeve is provided with a metal baffle and an anchor rod nut, the anchor rod nut is sleeved on the sleeve, and the metal baffle abuts against the surrounding rock, and the anchor rod nut and the metal baffle are used for fixing the anchor rod system and applying prestress.

[0012] Further, the grouting valve can be reused.

[0013] Further, the slurry flows out from the mouth of the exhaust pipe, indicating that the mortar is filled.

[0014] Further, the tail part of the anchor rod anchoring section is provided with an anchor rod friction head, and the anchor rod friction head is in close contact with the inner wall of the sleeve.

[0015] The technical scheme of the utility model can solve the problem of difficult grouting construction of the large deformation self-adaptive anti-blast anchor rod anchoring section, and the stop plate, the grouting pipe, the grouting valve and the exhaust pipe are arranged at the front end of the sleeve, so that the method for solving the grouting construction of the anchoring section is good, the construction is convenient, the reliability is high, the operation is safe, the processing difficulty is low, the construction cost is low, the assembly mode is simple, the construction progress is accelerated, and the construction efficiency is improved. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0017] Figure 1 It is a construction installation structure schematic view of the utility model embodiment.

[0018] Figure 2 A construction disassembling structure schematic view of the present application;

[0019] Figure 3 A structure schematic view of the present application;

[0020] Figure 4 A structure schematic view of the present application;

[0021] In the figure: 1, grouting pipe; 2, grouting valve; 3, grouting machine connecting pipe; 4, exhaust pipe; 5, grouting stop plate; 5-1, elastic rubber sleeve ring; 6, sleeve front end; 7, anchor rod nut; 8, metal baffle; 9, anchor rod friction head; 10, sleeve; 11, anchor rod anchoring section; 12, cement mortar; 13, surrounding rock. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment 1

[0026] As shown in Figures 1-4 ,

[0027] A large deformation self-adaptive anti-blast anchor grouting device, comprising a grouting pipe 1, a grouting valve 2, a grout stop plate 5 and an exhaust pipe 4, wherein:

[0028] The outer diameter of the grout stop plate 5 matches the diameter of the surrounding rock hole (or the diameter of the anchor drill bit), and an elastic rubber collar 5-1 is arranged on the outer ring of the grout stop plate 5, which can ensure installation in the surrounding rock hole without leaving a gap, and the grout will not flow back to the anchor sleeve section.

[0029] A central hole for the anchor anchoring section to pass through is formed in the middle of the grout stop plate 5, the inner diameter of the central hole of the grout stop plate 5 matches the diameter of the anchor anchoring section 11, and the grout stop plate 5 can be exactly fitted on the anchor anchoring section 11; the inner diameter of the central hole of the grout stop plate 5 is smaller than the diameter of the sleeve 10, which can rely on the sleeve 10 to block and offset the mortar pressure.

[0030] The function of the grout stop plate 5 is to prevent the grout from flowing back to the sleeve 10 range of the large deformation self-adaptive anchor, to ensure that the mortar is only in the range of the anchor anchoring section 11, and to ensure that the sleeve 10 range of the large deformation self-adaptive anchor is not filled with mortar, so that the sleeve section can slide freely under the action of the surrounding rock deformation.

[0031] A through hole is reserved on the grout stop plate 5 for the grouting pipe 1 and the exhaust pipe 4 to pass through, and the diameters of the through holes match the outer diameters of the grouting pipe 1 and the exhaust pipe 4 respectively.

[0032] The grouting pipe 1 is made of seamless steel pipe, which is used for injecting high-pressure slurry into the cavity of the anchor rod anchoring section 11, and the outer end of the grouting pipe 1 is provided with a reserved thread for connecting with the grouting valve 2.

[0033] The grouting valve 2 is opened after the initial setting of the cement mortar, so that the grouting is full and the slurry cannot flow back to cause the cavity phenomenon.

[0034] The exhaust pipe 4 is made of PVC pipe, which extends to the top end of the anchor rod, and is used for indicating that the grouting is full when the slurry flows out of the pipe.

[0035] The grouting construction adopts ordinary tunneling construction machinery, and special machinery is not needed.

[0036] The anchor rod nut 7 is screwed into the sleeve front end 6 and is tightened, and the metal baffle 8 is pressed on the surrounding rock 13, so that the pre-stress is applied to the anchor rod.

[0037] The grouting construction method of the large-deformation self-adaptive anti-blast anchor rod comprises the following steps:

[0038] ① drilling construction, drilling according to the drilling scheme and anchor rod positioning;

[0039] ② installing the anchor rod, the grouting stop plate 5, the grouting pipe 1, the exhaust pipe 4 and the grouting valve 2, and initially screwing the anchor rod nut 7;

[0040] ③ grouting construction, pouring the cement mortar 12 between the anchor rod anchoring section 11 and the surrounding rock 13, until the slurry flows out of the exhaust pipe 4, stopping grouting and closing the grouting valve;

[0041] ④ opening the grouting valve after the initial setting of the cement mortar, and removing the grouting valve; and re-screwing the anchor rod nut 7 after the cement mortar 12 reaches the design strength.

[0042] The grouting construction method of the large-deformation self-adaptive anti-blast anchor rod can solve the problem of difficult grouting construction of the anchor rod anchoring section, and can solve the grouting construction method of the anchor rod anchoring section, which is convenient, reliable, safe, low in processing difficulty and construction cost, simple in assembly, fast in construction progress and high in construction efficiency.

[0043] The utility model discloses a big deformation self -adaptation anti -blast anchor rod grouting device and construction method, solve big deformation self -adaptation anti -blast anchor rod grouting anchorage only can be anchored to the anchoring section, the sleeve section can not carry out the problem of grouting anchorage, and its construction is convenient, and the reliability is high, and the operation is safe, and the cost is low, and the processing difficulty is low, and the assembling mode is simple, and the construction progress is accelerated, and the comprehensive benefit is improved.

[0044] The utility model discloses a big deformation self -adaptation anti -blast anchor rod grouting device and construction method, solve big deformation self -adaptation anti -blast anchor rod grouting anchorage only can be anchored to the anchoring section, the sleeve section can not carry out the problem of grouting anchorage, and its construction is convenient, and the reliability is high, and the operation is safe, and the cost is low, and the processing difficulty is low, and the assembling mode is simple, and the construction progress is accelerated, and the comprehensive benefit is improved.

[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not limited to it; although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model.

Claims

1. A large deformation self-adapting anti-blast anchor rod grouting device, characterized in that, The device comprises a stop plate, a grouting pipe and an exhaust pipe, the outer diameter of the stop plate matches the aperture of the surrounding rock, and the center hole of the stop plate is sleeved on the anchoring segment of the anchor rod; the stop plate is provided with a through hole for the grouting pipe and the exhaust pipe to penetrate, the through hole matches the aperture of the grouting pipe and the exhaust pipe respectively, the grouting pipe is a seamless steel pipe, the grouting pipe is used for conveying high-pressure slurry into the cavity of the anchoring segment, and the exhaust pipe is a PVC pipe.

2. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 1, characterized in that, The outer ring of the stop plate is provided with an elastic rubber collar.

3. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 1, characterized in that, The grouting pipe is made of a seamless steel pipe, and the outer end of the grouting pipe is provided with a screw thread, and the grouting pipe is connected with the grouting valve through the screw thread.

4. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 3, characterized in that, The grouting valve is connected with the grouting machine through the grouting machine connecting pipe, so that no leakage or spouting occurs when the slurry is injected.

5. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 1, characterized in that, The exhaust pipe is a PVC pipe, and the exhaust pipe extends to the top end of the anchor rod and is used for indicating the filling state of the slurry.

6. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 1, characterized in that, The inner diameter of the center hole of the stop plate matches the diameter of the anchoring segment of the anchor rod, the inner diameter of the center hole of the stop plate is smaller than the inner diameter of the sleeve, and the stop plate offsets the slurry pressure through the pressure of the sleeve.

7. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 6, characterized in that, The tail end of the sleeve is provided with a metal baffle and an anchor rod nut, the anchor rod nut is sleeved on the sleeve, the metal baffle abuts against the surrounding rock, and the anchor rod nut and the metal baffle are used for fixing the anchor rod system and applying prestress.

8. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 3, characterized in that, The grouting valve can be reused.

9. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 1, characterized in that, The slurry flows out from the mouth of the exhaust pipe, indicating that the mortar is filled.

10. The large deformation self-adapting anti-blast anchor rod grouting device according to claim 6, characterized in that, The tail part of the anchoring segment of the anchor rod is provided with an anchor rod friction head, and the anchor rod friction head is in close contact with the inner wall of the sleeve.

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