Waterproof and anti-corrosion device suitable for constant-resistance large-deformation anchor rod

Abstract

The utility model discloses a waterproof and anti-corrosion device suitable for a constant-resistance large-deformation anchor rod, which belongs to the technical field of anchor rod corrosion prevention and comprises a constant-resistance large-deformation anchor rod, and an anchor rod waterproof structure is arranged on the outermost side of the constant-resistance large-deformation anchor rod positioned in surrounding rock; an external anchor rod waterproof and anti-corrosion structure is arranged on the outer side of the constant-resistance large-deformation anchor rod outside the surrounding rock, namely the circular tray; an anchoring section anti-corrosion layer is arranged on the anchoring section; and a sleeve is arranged outside the free section and the constant-resistance device. The anchoring section anti-corrosion layer is arranged to prevent water from corroding the anchoring section; a sleeve is arranged outside the free section and the constant resistance device to ensure stable connection and water resistance; the joint of the anchoring section and the sleeve is isolated from surrounding rock through the honeycomb-shaped drainage plate, so that the free section is prevented from being eroded by water when the free section extends out of the sleeve during working; a waterproof cover is arranged to prevent the nut and the threaded end from being corroded; the mechanical property and strength of the anchor rod are guaranteed by conducting comprehensive waterproofing on the anchor rod, and therefore the stability of surrounding rock of underground engineering is maintained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the anchor rod anticorrosion technical field, and specifically relates to a waterproof anticorrosion device suitable for constant resistance large deformation anchor rod. BACKGROUND

[0002] The statements in this part only provide background technical information related to the utility model and do not necessarily constitute prior art.

[0003] With the rapid development of society, underground engineering such as tunnels and coal mine roadways gradually develop to the deep part, and the underground pressure received by engineering gradually increases with the increase of depth, and the compression resistance of engineering surrounding rock becomes an important factor that cannot be ignored, and anchor rod becomes a good choice for maintaining the stability of surrounding rock, and constant resistance large deformation anchor rod and constant resistance large deformation anchor cable gradually become one of the supporting modes commonly used in engineering fields such as geotechnical engineering and tunnel engineering.

[0004] However, constant resistance large deformation anchor rod is very easy to be corroded by water when applied in underground engineering, so that the mechanical properties of the anchor rod are changed and the strength of the anchor rod is reduced, and then the supporting effect is affected, leading to the decrease of the stability of surrounding rock, which is an important factor affecting the stability of surrounding rock structure. CONTENT OF THE UTILITY MODEL

[0005] In view of the above problems, the utility model provides a waterproof anticorrosion device suitable for constant resistance large deformation anchor rod, water corrosion of the anchoring section of the constant resistance large deformation anchor rod is prevented by arranging an anchoring section anticorrosion layer; a sleeve is arranged outside the free section and the constant resistance device to ensure stable connection and waterproof; the anchoring section and the sleeve connection part are isolated from surrounding rock by arranging a honeycomb drainage plate, so that the free section is prevented from stretching out of the sleeve and being eroded by water during work; a waterproof cover is arranged to prevent the nut and threaded end from being easily corroded under the double action of water and air; the mechanical properties and strength of the anchor rod are ensured by comprehensively waterproofing the anchor rod, so that the stability of surrounding rock of underground engineering is maintained.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A waterproof anticorrosion device suitable for constant resistance large deformation anchor rod, comprising a constant resistance large deformation anchor rod, the constant resistance large deformation anchor rod is divided into an anchoring section, a free section and a fixed section, the fixed section comprises a constant resistance device, a circular tray, a nut and a threaded end; the part of the constant resistance large deformation anchor rod located in the surrounding rock is provided with an anchor rod waterproof structure on the outermost side;

[0008] The constant resistance large deformation anchor rod located outside the surrounding rock, i.e. the outer side of the circular tray, is provided with an external anchor rod waterproof anticorrosion structure; an anchoring section anticorrosion layer is arranged on the anchoring section; a sleeve is arranged outside the free section and the constant resistance device.

[0009] Preferably, the sleeve is a hollow cylinder, and the hollow shape thereof comprises three parts, namely a small cylindrical section, a frustoconical section and a large cylindrical section.

[0010] Preferably, the corrosion-proof layer of the anchoring section comprises three layers, namely an ethylene-vinyl acetate polymer waterproof material, a ceramic waterproof material and a waterproof resin anchoring agent.

[0011] Preferably, the waterproof structure of the anchor rod is made of a honeycomb drainage plate, and is wrapped outside the sleeve and the anchoring section of the set length.

[0012] Preferably, the honeycomb drainage plate is a hollow cylinder, and the hollow shape thereof is also cylindrical, and the diameter of the hollow part is greater than the outer diameter of the sleeve.

[0013] Preferably, the connection between the circular tray and the surrounding rock is provided with a drain pipe, and the drain pipe is connected with the honeycomb drainage plate. Preferably, the external waterproof and corrosion-proof structure of the anchor rod is a semicircular waterproof cover.

[0014] Preferably, a plurality of hooks are uniformly arranged on the circumferential side edge of the circular tray.

[0015] Preferably, the semicircular waterproof cover is clamped outside the circular tray through the hooks, so as to wrap the circular tray, the nut and the threaded section.

[0016] Compared with the prior art, the utility model has the advantages and positive effects that:

[0017] The utility model discloses a corrosion-proof layer of the anchoring section is arranged to prevent the corrosion of water to the anchoring section of the constant resistance large deformation anchor rod. The sleeve is arranged outside the free section and the constant resistance device to ensure the stability of the connection and waterproof. The honeycomb drainage plate is arranged to isolate the connection between the anchoring section and the sleeve from the surrounding rock, prevent the free section from stretching out of the sleeve during work, and prevent water from eroding the free section. The waterproof cover is arranged to prevent the nut and the threaded end from being easily corroded under the double action of water and air. The anchor rod is comprehensively waterproofed to ensure the mechanical properties and strength of the anchor rod, thereby maintaining the stability of the surrounding rock of the underground engineering. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of the utility model form a part of the utility model and serve to provide further understanding of the utility model. The schematic embodiments of the utility model and the description thereof serve to explain the utility model, and do not constitute an improper limitation on the utility model.

[0019] Figure 1 It is the overall arrangement section view of the waterproof and corrosion-proof device of the utility model embodiment.

[0020] Figure 2is the anchor section anticorrosion layer arrangement sectional view of the utility model embodiment;

[0021] Figure 3 is the anchor rod waterproof structure arrangement sectional view of the utility model embodiment;

[0022] Figure 4 is the right view of the utility model embodiment Figure 3 ;

[0023] Figure 5 is the external anchor rod waterproof anticorrosion structure arrangement sectional view of the utility model embodiment;

[0024] Figure 6 is the right view of the utility model embodiment Figure 1 ;

[0025] In the figure,

[0026] 1, surrounding rock; 2, honeycomb drainage plate; 3, constant resistance large deformation anchor rod; 4, sleeve; 5, circular tray; 6, nut; 7, threaded end; 8, semicircular waterproof cover; 9, waterproof resin anchoring agent; 10, ceramic waterproof material; 11, ethylene vinyl acetate polymer waterproof material; 12, anchor section anticorrosion layer; 13, anchor rod waterproof structure; 14, hook; 15, drain pipe; 16, external anchor rod waterproof anticorrosion structure. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed description is exemplary, and is intended to provide further explanation of the utility model. Unless otherwise specified, all technical and scientific terms used in this paper have the same meaning as that generally understood by those skilled in the art to which the utility model belongs.

[0028] The utility model is described in detail below in conjunction with the drawings, and the disclosed embodiment is a kind of waterproof anticorrosion device suitable for constant resistance large deformation anchor rod, as shown in Figure 1 , including constant resistance large deformation anchor rod 3, constant resistance large deformation anchor rod belongs to prior art, is divided into anchoring section, free section and fixed section, anchoring section, free section are arranged in surrounding rock 1, fixed section includes constant resistance device, circular tray 5, nut 6, threaded end 7, fixed section part is in surrounding rock, part is in surrounding rock outside, wherein circular tray 5, nut 6, threaded end 7 and part constant resistance device are located in surrounding rock outside.

[0029] As Figure 1As shown, the outer side of the constant resistance large deformation anchor rod 3 is provided with a sleeve 4, the sleeve 4 is cylindrical, the inside of the sleeve 4 is hollow, the inside hollow shape includes three parts, which are a small cylindrical section adhering to the free section, a circular truncated cone section adhering to the constant resistance device and a large cylindrical section; the constant resistance device and the free section are wrapped to enhance the connection stability of the free section and the fixed section of the constant resistance large deformation anchor rod 3, and to protect the constant resistance device and the free section from water erosion.

[0030] As shown in the drawings, Figure 1 The constant resistance large deformation anchor rod located in the surrounding rock has an outermost anchor rod waterproof structure 13, the anchor rod waterproof structure 13 is a hollow whole, the hollow part can put the constant resistance large deformation anchor rod into during construction, the anchor rod waterproof structure 13 not only wraps the sleeve 4 of the constant resistance large deformation anchor rod 3 completely, but also can wrap the anchoring section with a set length, because the anchor rod will have a certain elongation deformation in application, which will cause the free section to extend out of the sleeve; in this embodiment, it is necessary to wrap the anchoring section with a set length of 100mm, it can be understood that in actual application, because the actual elongation of the anchor rod is different, the set length can be shorter or longer than 100mm; so as to protect the connection between the sleeve and the anchoring section, that is, to ensure the connection position of the free section and the anchoring section. The anchoring section is provided with an anchoring section corrosion-resistant layer 12; the constant resistance large deformation anchor rod located outside the surrounding rock, that is, the outer side of the circular tray 5 is provided with an external anchor rod waterproof and corrosion-resistant structure.

[0031] As shown in the drawings, Figure 1 , Figure 2 The anchoring section corrosion-resistant layer 12 is provided on the outer side of the anchoring section rod body extending out of the sleeve 4, and is divided into three layers from inside to outside, including ethylene vinyl acetate high molecular waterproof material 11, ceramic waterproof material 10 and waterproof resin anchoring agent 9. The thickness of the ethylene vinyl acetate high molecular waterproof material 11 and the ceramic waterproof material 10 is 10mm, and the waterproof resin anchoring agent needs to be determined according to the actual distance between the surrounding rock and the anchor rod. It should be noted that the ethylene vinyl acetate high molecular waterproof material 11 and the ceramic waterproof material 10 need to wrap the rod body of the anchoring section.

[0032] The ethylene vinyl acetate high molecular waterproof material 11 has good water resistance, corrosion resistance and aging resistance; the functional groups of the ceramic waterproof paint are dehydrated and adhered together to form a film, cross-linked and solidified to form an interpenetrating network structure, which is a continuous elastic high-strength and high-elasticity dense waterproof coating; the waterproof resin anchoring agent has the advantages of fast normal temperature curing, high bonding strength, reliable anchoring force, good durability and waterproof performance, not only has the functions of waterproofing and corrosion protection, but also enhances the connection strength of the constant resistance large deformation anchor rod and the surrounding rock. The waterproof resin anchoring agent adopts the existing technology and has two components, which are wrapped into a roll shape, brought into the drill hole by the anchor rod, and formed after stirring.

[0033] In this embodiment, the anchor section corrosion prevention layer 12 is provided with three layers in total, each layer of material has the characteristics of waterproof and corrosion prevention, which can effectively block the contact between the constant resistance large deformation anchor rod anchor section and water and air, and can effectively maintain the mechanical properties of the anchor rod.

[0034] As shown in Figure 1 , Figure 3 , the anchor rod waterproof structure 13 is made of a cylindrical honeycomb drainage board 2, the model of the honeycomb drainage board is a 20mm thick HDPE plastic drainage board, the HDPE plastic drainage board is formed into a cylindrical shape by rotating, the inside of the honeycomb drainage board 2 is a hollow cylinder, which can wrap the sleeve, it can be understood that the outer diameter of the honeycomb drainage board 2 should be smaller than the diameter of the drill hole; which is set outside the sleeve 4 of the constant resistance large deformation anchor rod 3 and the anchor section of the set length, which is used to ensure that the position where the anchor section and the free section of the constant resistance large deformation anchor rod 3 are connected can be isolated from the surrounding rock.

[0035] Due to the characteristics of the constant resistance large deformation anchor rod: after the anchor section is anchored with the surrounding rock, with the change of time, the free section rod body in the sleeve will be pulled out a part under the action of the surrounding rock. At this time, the role of the anchor rod waterproof structure 13 can be highlighted, not only can prevent the water in the surrounding rock from contacting the joint of the anchor section rod body and the sleeve; but also can prevent the free section rod body from extending out of the sleeve in the later stage, which is exposed to the water erosion in the surrounding rock, causing the free section rod body in the sleeve to be eroded, reducing the deformation ability and strength of the constant resistance large deformation anchor rod.

[0036] It can be understood that the honeycomb drainage board 2 is a prior art, and the material of the honeycomb drainage board 2 is polyethylene (HDPE). As shown in Figure 4 , the anchor rod waterproof structure 13 is a hollow cylinder, the internal hollow shape is also cylindrical, the diameter of the internal hollow part is greater than the outer diameter of the sleeve, in this embodiment, the diameter of the internal hollow part is greater than the outer diameter of the sleeve by 2mm, which is used to pass through the constant resistance large deformation anchor rod, wrap it up, and isolate it from the surrounding rock.

[0037] As shown in Figure 1 , Figure 5 , Figure 6 , the external anchor rod waterproof and corrosion prevention structure 16 is located at the outlet of the constant resistance large deformation anchor rod 3, which is a semicircular waterproof cover 8; in this embodiment, the diameter of the semicircular waterproof cover 8 is 480mm, a plurality of hooks 14 are uniformly arranged on the circumferential side edge of the circular tray, in the embodiment, the number of hooks is 4; the semicircular waterproof cover 8 is clamped on the outside of the circular tray, the nut and the threaded end through the hooks 14, the semicircular waterproof cover can effectively cover the circular tray 5, the nut 6 and the threaded end 7 under the action of the hooks 14, reducing the contact of the constant resistance large deformation anchor rod 3 with water and air outside the surrounding rock.

[0038] As shown in Figure 1As shown, the connection between the circular tray 5 and the surrounding rock 1 is provided with a drain pipe 15, the material of the drain pipe 15 is polypropylene (PP), which has the characteristics of high hardness, non-aging, heat resistance, low density, etc., the drain pipe 15 is connected with the honeycomb drainage plate 2, can effectively drain the water in the anchor rod waterproof structure out of the drill hole, and has strength, ensures that the circular tray is not crushed when subjected to the force of the surrounding rock.

[0039] Construction process:

[0040] When the waterproof and corrosion-resistant device of the constant resistance large deformation anchor rod is put in, drilling is needed, the drilling depth of the anchor rod is 200mm shorter than the length of the anchor rod used on site; the diameter of the drilling needs to ensure that the constant resistance large deformation anchor rod and the anchor rod waterproof structure are completely put in, in the embodiment, the drilling diameter is set to 150mm;

[0041] After drilling, the hole is blown clean;

[0042] On the rod body of the anchoring section, the ethylene-vinyl acetate high-molecular waterproof material 11 and the ceramic waterproof material 10 are pre-coated;

[0043] The waterproof resin anchoring agent is wrapped on the anchoring end coated with two layers of waterproof materials, at this time, the sleeve 4 can also prevent the waterproof resin anchoring agent from being wrapped on the free section; then the anchor rod waterproof structure 13 (i.e. the honeycomb drainage plate) is sleeved outside the sleeve 4 and the anchoring section of the set length;

[0044] Then the sleeve with the waterproof resin anchoring agent and the anchor rod waterproof structure and the constant resistance large deformation anchor rod rod body are put into the drill hole; then the sleeve and the rod body are rotated, so that the two components of the waterproof resin anchoring agent are stirred to form, and the anchoring of the surrounding rock and the rod body is enhanced;

[0045] The drain pipe 15 is connected below the outlet of the honeycomb drainage plate 2, facilitating water discharge;

[0046] Finally, the circular tray 5 is installed for reinforcement, and the semicircular waterproof cover 8 is installed on the circular tray.

[0047] The utility model discloses a corrosion-resistant layer is set up on the anchoring section to prevent the corrosion of water to the anchoring section of the constant resistance large deformation anchor rod, a sleeve is arranged on the free section and the constant resistance device to ensure the stability of connection and waterproof, the honeycomb drainage plate is arranged to isolate the connection between the anchoring section and the sleeve from the surrounding rock, prevent the free section from stretching out of the sleeve during work, and prevent water from eroding the free section, a waterproof cover is set up to prevent the nut and the threaded end from being easily corroded under the double action of water and air, the mechanical properties and strength of the anchor rod are ensured through comprehensive waterproofing, so that the stability of the surrounding rock of underground engineering is maintained.

[0048] The utility model discloses above although the specific embodiment of the utility model has been described in conjunction with the drawing, is not the limit to the protection scope of the utility model, and the person skilled in the art should understand that on the basis of the technical scheme of the utility model, various modifications or deformation that the person skilled in the art can make without paying creative labour are still within the protection scope of the utility model.

Claims

1. A waterproof and anticorrosion device suitable for constant resistance large deformation anchor rod, comprising a constant resistance large deformation anchor rod, the constant resistance large deformation anchor rod is divided into an anchoring section, a free section and a fixed section, the fixed section comprises a constant resistance device, a circular tray, a nut and a threaded end; characterized in that, The constant resistance large deformation anchor rod located in the surrounding rock has an outermost anchor rod waterproof structure; The constant resistance large deformation anchor rod located outside the surrounding rock has an outer anchor rod waterproof and corrosion resistant structure outside the circular tray; the anchoring section is provided with an anchoring section corrosion resistant layer; and the free section is externally provided with a sleeve.

2. A waterproof and anticorrosive device suitable for a constant resistance large deformation anchor rod according to claim 1, characterized in that, The sleeve is a hollow cylinder, and the hollow shape inside the sleeve includes three parts, namely a small cylindrical section that fits the free section, a circular truncated cone section that fits the constant resistance device, and a large cylindrical section.

3. A waterproof and anticorrosive device suitable for constant resistance large deformation anchor rod according to claim 1, characterized in that, The anchoring section corrosion resistant layer is divided into three layers, including, from the inside out, an ethylene vinyl acetate high polymer waterproof material, a ceramic waterproof material, and a waterproof resin anchoring agent.

4. A waterproof and anticorrosive device for a constant resistance large deformation anchor rod according to claim 1, characterized in that, The anchor rod waterproof structure is made of a honeycomb drainage plate and wrapped outside the sleeve and the anchoring section of a certain length.

5. A waterproof and anticorrosive device suitable for a constant resistance large deformation anchor rod according to claim 4, characterized in that, The honeycomb drainage plate is a hollow cylinder, and the hollow shape inside the honeycomb drainage plate is also cylindrical, with the diameter of the hollow part being greater than the outer diameter of the sleeve.

6. A waterproof and anticorrosive device suitable for a constant resistance large deformation anchor rod according to claim 4, characterized in that, The circular tray is provided with a drainage pipe at the connection with the surrounding rock, and the drainage pipe is connected with the honeycomb drainage plate.

7. A waterproof and anticorrosive device for a constant resistance large deformation anchor rod according to claim 1, characterized in that, The outer anchor rod waterproof and corrosion resistant structure is a semicircular waterproof cover.

8. A waterproof and corrosion-proof device suitable for constant resistance large deformation anchor rod according to claim 7, characterized in that, Multiple hooks are uniformly arranged on the circumferential side edge of the circular tray.

9. A waterproof and corrosion-proof device suitable for constant resistance large deformation anchor rod according to claim 8, characterized in that, The semicircular waterproof cover is clamped outside the circular tray through the hooks to wrap the circular tray, the nut, and the threaded section.

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