Pressure type recoverable anchor rod

Abstract

The utility model discloses a pressure type recoverable anchor rod which comprises a rod body, a sleeve is arranged on the peripheral side of the rod body in a sleeved mode, and the length of the sleeve is smaller than that of the rod body. The bottom end of the rod body is detachably and fixedly connected with the top of the anchor head, and the bottom end of the sleeve is fixedly and hermetically connected with the top of the anchor head; the base plate is movably connected to the upper portion of the rod body, the bottom face of the base plate is tightly connected with the top end of the sleeve, and the upper portion of the rod body is provided with a locking piece abutting against the top face of the base plate. The device is simple in structure, safe to use and capable of being recycled and reused.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building equipment especially to a pressure type recyclable anchor rod. BACKGROUND

[0002] The soil nailing wall is a kind of in-situ soil reinforcement technology. The foundation pit slope is reinforced by soil nails made of steel bars, and a steel bar mesh is laid on the slope surface, and then a layer of concrete surface layer is sprayed, to form a slope reinforcement type support construction method combined with the slope support of earthwork. The structure is a composite formed by the reinforced bar (i.e. soil nail) arranged in the slope and the surrounding soil, and a support structure similar to a gravity retaining wall formed by the surface layer. The soil nail is a structure formed by inserting a steel bar into a hole on the slope surface and then injecting mud slurry to solidify.

[0003] In slope engineering, the support technology combining soil nails, steel flower tubes and sprayed concrete is an effective method to strengthen slope stability. As a key technology to ensure slope safety, it has the advantages of simple and rapid construction, low cost, good support effect, etc. However, temporary slope support, after the main structure construction is completed, these temporary support structures no longer play a role, and after the backfilling engineering is completed, the steel bars and steel tubes are buried underground and cannot be taken out, resulting in great material waste, underground pollution and occupation of a large amount of underground space. To establish a green, low-carbon and recyclable temporary slope support system, it is urgent to create a recyclable anchor rod that can be effectively recycled and reused.

[0004] Currently, anchor rod acceptance inspection is only selective sampling of 5%, as long as the test results meet the requirements, it is determined that the engineering anchor rod meets the requirements. However, in actual engineering, there may be some areas with sudden changes in physical and mechanical properties in the stratum. This area may not be selected in the pile selection meeting, so the quality of this area is not detected, and it cannot be determined whether it meets the requirements. If the anchor rod in this area cannot provide sufficient uplift resistance, it is easy to cause the slope to slide from the local to the whole. Therefore, the construction unit needs to conduct comprehensive anchor rod quality detection and recording, but the existing rod body of the anchor rod made of steel bars and steel pipes cannot be effectively prestressed as the detection unit. SUMMARY

[0005] Therefore, it is necessary to provide a pressure type recyclable anchor rod with simple structure, safety and reliability, and low use cost.

[0006] To solve the above technical problems, the technical scheme of the utility model is as follows: a pressure type recyclable anchor rod, comprising:

[0007] A rod body, a sleeve is arranged on the outer periphery of the rod body, and the length of the sleeve is less than the length of the rod body;

[0008] Anchoring head, the bottom end of the rod body is detachably fixedly connected with the top of the anchoring head, and the bottom end of the sleeve is fixedly and sealingly connected with the top of the anchoring head;

[0009] A cushion plate, which is movably connected to the upper portion of the rod body, is closely connected with the top end of the sleeve, and the upper portion of the rod body has a locking piece abutting against the top surface of the cushion plate.

[0010] Further, a shotcrete protection cover is further arranged to cover the rod body and the locking piece above the top surface of the cushion plate.

[0011] Further, the locking piece is a locking nut screwed on the rod body.

[0012] Further, the sleeve is a plastic sleeve.

[0013] Further, the rod body is a finished rolled threaded steel.

[0014] Further, the bottom end of the rod body is screwed on the top of the anchoring head.

[0015] Further, the top of the anchoring head is provided with an anti-overflow quick connector, and the bottom end of the sleeve is inserted into the anti-overflow quick connector.

[0016] Further, the bottom end of the anchoring head is in a conical shape with a large top and a small bottom.

[0017] Further, a plurality of rib plates are fixedly connected to the peripheral side wall of the anchoring head.

[0018] Further, a plurality of centering plates are fixedly connected to the sleeve.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The device can apply prestress for tensioning after the anchoring rod construction is completed, so as to detect the grouting body quality of each anchoring rod, and transmit the pressure to the grouting body, avoid cracks of the grouting body, and provide strong guarantee for the tensile effect of the anchoring rod.

[0021] 2. Secondly, the anchoring rod steel is provided with corrosion protection measures, and the plastic sleeve can effectively protect the anchoring rod steel, and the anchoring rod steel can be quickly reused in other engineering applications after recovery. Because the diameter of the finished rolled threaded steel is large, the single anchoring rod can be reused many times, and theoretically, the anchoring rod can be reused many times under the condition of not breaking the rod body and after the third-party detection result after recovery meets the design requirements. In permanent engineering, engineering practice inspection finds that the grouting body of the tension type anchoring rod may fail over time, and therefore, it is the consensus of the engineering field to gradually use the pressure type anchoring rod to replace the tension type anchoring rod.

[0022] For the above and other objects, features and advantages of the present application, preferred embodiments will be described in detail in the following text, and together with the appended drawings, a detailed description is given below. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 The structure schematic diagram of the embodiment of the present application.

[0024] Fig. 2 The structure schematic diagram of the anchor head in the embodiment of the present application.

[0025] In the figure: 1-rod body, 2-anchor head, 21-rib plate, 22-anti-overflow grouting quick connector, 3-sleeve, 4-pad, 5-locking piece, 6-grouting protection cover, 7-centering plate. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects taken by the present application to achieve the predetermined invention purposes, the specific implementation, structure, features and effects according to the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0027] As shown in Figs. 1-2 A pressure type recyclable anchor rod, comprising: a rod body 1, an anchor head 2 and a sleeve 3.

[0028] The sleeve 3 is sleeved on the rod body 1, the rod body 1 is made of fine rolling threaded steel, the sleeve 3 is a plastic sleeve, and the length of the sleeve 3 is less than the length of the rod body 1. The plastic sleeve plays a role of corrosion protection and ensures that the rod body is isolated from the grouting body.

[0029] The bottom end of the rod body 1 is screwed to the top of the anchor head 2, the top of the anchor head 2 is provided with an anti-overflow grouting quick connector 22, and the bottom end of the sleeve 3 is inserted into the anti-overflow grouting quick connector 22. The anti-overflow grouting quick connector 22 is used to avoid that the external grout flows into the sleeve (if the grout in the sleeve seeps in and solidifies, the friction between the rod body and the sleeve will become larger, and it will become difficult to rotate the rod body when the rod body is recycled). The role of the anti-overflow grouting quick connector is to quickly connect the sleeve and the lower anchor head, which is convenient for workers to install.

[0030] The upper part of the rod body 1 is sleeved with a pad 4, and the material of the pad 4 is a steel plate. The bottom surface of the pad 4 is tightly connected with the top end of the sleeve 3, and the upper part of the rod body 1 has a locking piece 5 abutting against the top surface of the pad. The locking piece 5 is a locking nut screwed on the rod body 1.

[0031] In order to avoid that the rod body 1 and the locking piece 5 above the pad 4 are sprayed by the grouting body, a grouting protection cover 6 is further included, which covers the rod body and the locking piece above the top surface of the pad.

[0032] In order to ensure the installation accuracy of the device, a plurality of centering plates 7 are fixedly connected on the sleeve.

[0033] In this embodiment, the bottom end of the anchor head 2 is in the shape of a large upper and small lower cone.

[0034] In this embodiment, the circumferential wall of the anchor head 2 is fixedly connected with a plurality of rib plates 21. The rib plates 21 are used to increase the friction between the anchor head and the grout, so that the recovery rod body, when the rod body is manually rotated, the anchor head will not spin in place (if it spins in place, the rod body cannot be withdrawn from the anchor head).

[0035] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any equivalent embodiments with equivalent changes are still within the scope of the present application.

Claims

1. A pressure type recyclable anchor rod, characterized by, The utility model relates to a kind of anchor head and anchor rod, including: Rod body, a sleeve is sleeved on the outer periphery side of the rod body, the length of the sleeve is less than the length of the rod body; Anchor head, the bottom end of the rod body is detachably fixedly connected with the top of the anchor head, and the bottom end of the sleeve is fixedly and sealingly connected with the top of the anchor head; Backing plate, the backing plate is movably connected in the upper portion of the rod body, the bottom surface of the backing plate is closely connected with the top end of the sleeve, and the upper portion of the rod body has locking member that abuts against the top surface of the backing plate.

2. A pressure type recoverable anchor rod according to claim 1, characterized in that: It further includes a shotcrete protection cover, and the shotcrete protection cover covers the rod body and the locking member above the top surface of the backing plate.

3. A pressure type recoverable anchor rod according to claim 1, characterized in that: The locking member is locking nut screwed on the rod body.

4. A pressure type recoverable anchor rod according to claim 1, characterized in that: The sleeve is a plastic sleeve.

5. A pressure type recoverable anchor rod according to claim 1, characterized in that: The rod body is a finished rolled threaded steel.

6. The pressure-type recyclable anchor according to claim 1, characterized in that: The bottom end of the rod body is screwed on the top of the anchor head.

7. A pressure type recoverable anchor rod according to claim 1, characterized in that: The top of the anchor head has an anti-overflowing quick connector, and the bottom end of the sleeve is inserted into the anti-overflowing quick connector.

8. A pressure type recoverable anchor rod according to claim 1, characterized in that: The bottom end of the anchor head is in the shape of a large upper and small lower cone.

9. A pressure type recoverable anchor rod as claimed in claim 1, wherein: The anchor head has a plurality of rib plates fixedly connected to the peripheral wall.

10. A pressure type recoverable anchor rod according to claim 1, characterized in that: A plurality of centering plates are fixedly connected to the sleeve.

Images