Anchor rod capable of measuring length after installation

Abstract

The utility model discloses an anchor rod capable of measuring the length after installation, and relates to the technical field of anchoring components. Comprising an anchor rod body, the anchor rod body comprises an anchoring section and a calibration section which are sequentially connected and homogeneous, after installation is completed, the anchoring section is located in an anchor rod hole, and the calibration section is located outside an engineering structure; the two ends of the testing wire are electrically connected with the corresponding ends of the anchor rod body respectively, and the length of the testing wire is larger than that of the anchor rod body. According to the anchor rod capable of measuring the length after being installed, the resistance value of the whole anchor rod and the resistance value of the calibration section can be conveniently tested through the ohmmeter, and the actual length of the anchoring section can be calculated according to the resistance value of the whole anchor rod, the resistance value of the calibration section and the length of the calibration section. And the length of the anchoring section can be accurately obtained, so that jerry work and material reduction behaviors in a project are completely eradicated, and the construction quality of the enclosure anchor rod is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of anchoring components, in particular to an anchor rod whose length can be measured after installation. Background Art

[0002] In tunnel support engineering systems, the quality of anchor bolt installation directly impacts the stability of the entire tunnel, particularly whether the bolt length meets design requirements. However, since anchor bolt installation is a concealed project and lacks effective measurement methods, it is difficult to accurately determine the actual length of the anchor bolt during post-installation inspections. If the anchor bolt length cannot be accurately measured, it may be insufficient or fail to meet design requirements (indicating shoddy workmanship), which will directly affect the support effectiveness and even cause safety accidents. Therefore, an anchor bolt with measurable length after installation is urgently needed. Utility Model Content

[0003] In response to the technical problem that it is difficult to accurately measure the length of existing anchor rods after installation, the utility model provides an anchor rod whose length can be measured after installation. By measuring the resistance value of the entire anchor rod and the resistance value of the calibration section, the length of the anchoring section can be accurately obtained, thereby eliminating the practice of cutting corners in the project and ensuring the construction quality of the retaining anchor rod.

[0004] The utility model is achieved through the following technical solutions:

[0005] The utility model provides an anchor rod whose length can be measured after installation, comprising: an anchor rod body, the anchor rod body comprising an anchoring section and a calibration section connected in sequence and of the same nature, after installation is completed, the anchoring section is located in the anchor rod hole, and the calibration section is located outside the engineering structure; a test wire, both ends of the test wire are respectively electrically connected to the corresponding ends of the anchor rod body, and the length of the test wire is greater than the length of the anchor rod body.

[0006] The utility model provides an anchor rod capable of measuring length after installation, comprising an anchor rod body and a test wire, wherein the anchor rod body comprises a homogeneous anchoring section and a calibration section connected in sequence, and both ends of the test wire are electrically connected to the corresponding ends of the anchor rod body, and the length of the test wire is greater than the length of the anchor rod body.

[0007] During installation, insert the anchoring section into the anchor hole, tension the test wire located in the anchor hole and make the test wire insulated from the side wall of the anchor body, and then grout to fix the anchoring section, and then carry out subsequent construction operations. Since the length of the test wire is greater than the length of the anchor body, at this time, the excess test wire is located outside the engineering structure. When it is necessary to detect the length of the anchor, first cut off the test wire located outside the engineering structure, use an ohmmeter to measure the resistance value of the entire anchor, and at the same time measure the resistance value of the calibration section. The anchoring section and the calibration section are of the same quality, and the length of the calibration section can be directly measured (or directly obtained). Therefore, the actual length of the anchoring section can be calculated based on the resistance value of the entire anchor, the resistance value of the calibration section, and the length of the calibration section.

[0008] Among them, since the length of the test wire is greater than the length of the anchor body, on the one hand, it can prevent the test wire from being broken when grouting the anchor hole, and on the other hand, it can make the test wire slack outside the engineering structure, which is convenient for cutting the test wire and connecting the test wire to the ohmmeter.

[0009] Therefore, the anchor capable of measuring the length after installation provided by the present utility model can accurately obtain the length of the anchoring section, thus eliminating the behavior of cutting corners in the project, and further ensuring the construction quality of the retaining anchor.

[0010] In an optional embodiment of the present utility model, it further includes a flexible protective sleeve, and the flexible protective sleeve is sleeved outside the anchor body to protect the calibration section through the flexible protective sleeve.

[0011] In an optional embodiment of the present utility model, the flexible protective sleeve is a PVC pipe, which is convenient for sleeving the flexible protective sleeve on the calibration section and removing it from the calibration section.

[0012] In an optional embodiment of the present utility model, the slack section of the test wire is accommodated in the flexible protective sleeve to protect the slack section of the test wire through the flexible protective sleeve.

[0013] In an optional embodiment of the present utility model, it further includes a wire protective sleeve, and the wire protective sleeve is sleeved outside the test wire to protect the test wire through the wire protective sleeve and prevent the test wire from being damaged during the construction of inserting the anchor body and grouting the anchor hole.

[0014] In an optional embodiment of the present utility model, the wire protective sleeve is made of PVC material to facilitate the protection of the test wire.

[0015] In an optional embodiment of the present utility model, the diameter of the wire protective sleeve is greater than 3 mm to ensure that the test wire has a sufficient cross-sectional area to reduce the influence of the self-resistance of the test wire on the test result.

[0016] In an optional embodiment of the present utility model, the difference between the length of the test wire and the length of the anchor rod body is greater than 10 cm, so as to ensure that the test wire can be arranged at intervals with the anchor rod body while ensuring that the test wire has a sufficient slack section.

[0017] In an optional embodiment of the present utility model, the length of the calibration section is greater than 4 cm, so as to facilitate exposing the calibration section outside the engineering structure.

[0018] In an optional embodiment of the present utility model, the length of the calibration section is 5 cm, so as to facilitate calculating the length of the anchorage section.

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

[0020] The anchor rod capable of measuring the length after installation provided by the present utility model includes an anchor rod body and a test wire. The anchor rod body includes a homogeneous anchorage section and a calibration section connected in sequence. The two ends of the test wire are electrically connected to the corresponding ends of the anchor rod body respectively, and the length of the test wire is greater than the length of the anchor rod body. During installation, the anchorage section is inserted into the anchor rod hole, and the test wire located in the anchor rod hole is tensioned and insulated from the side wall of the anchor rod body, and then grouting is carried out to fix the anchorage section, and then subsequent construction operations are carried out. Since the length of the test wire is greater than the length of the anchor rod body, at this time, the redundant test wire is located outside the engineering structure. When detecting the length of the anchor rod, first cut off the test wire located outside the engineering structure, use an ohmmeter to measure the resistance value of the whole anchor rod, and at the same time measure the resistance value of the calibration section. The anchorage section and the calibration section are homogeneous, and the length of the calibration section can be directly measured (or directly obtained). Therefore, the actual length of the anchorage section can be calculated according to the resistance value of the whole anchor rod, the resistance value of the calibration section and the length of the calibration section, so as to accurately obtain the length of the anchorage section, thus preventing the behavior of cutting corners in the project, and further ensuring the construction quality of the retaining anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without creative efforts.

[0022] In the drawings:

[0023] Figure 1 It is a schematic structural diagram of the anchor rod body after installation in the embodiment of the present utility model;

[0024] Figure 2It is a schematic structural diagram for testing the overall resistance of the bolt body in the embodiment of the present utility model;

[0025] Figure 3 It is a schematic structural diagram for testing the resistance of the calibration section of the test structure in the embodiment of the present utility model.

[0026] Marks in the attached drawings and corresponding component names:

[0027] 10 - Bolt body, 11 - Anchoring section, 12 - Calibration section, 20 - Test wire, 30 - Flexible protective sleeve, 40 - Ohmmeter. Specific embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Components of the embodiments of the present application described and illustrated herein generally may be arranged and designed in a variety of different configurations.

[0029] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0030] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0031] In the description of the embodiments of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of this application is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation to the present application.

[0032] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "set", "install", "connect", and "couple" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] It should be noted that since the installation of the anchor rod is a concealed project and there is a lack of effective measurement means, it is difficult to accurately judge the actual length of the anchor rod during the later inspection after the installation is completed.

[0034] To solve the above-mentioned problems, the inventor has innovatively designed the following technical solutions, and the specific implementation solutions of the present application will be described in detail below in conjunction with the accompanying drawings.

[0035] Embodiment

[0036] Combined with Figure 1 [[ID=,14]]In this embodiment, an anchor rod capable of measuring the length after installation is provided, including: an anchor rod body 10, the anchor rod body 10 includes a homogeneous anchoring section 11 and a calibration section 12 connected in sequence. After the installation is completed, the anchoring section 11 is located inside the anchor rod hole, and the calibration section 12 is located outside the engineering structure; a test wire 20, both ends of the test wire 20 are electrically connected to the corresponding ends of the anchor rod body 10 respectively, and the length of the test wire 20 is greater than the length of the anchor rod body 10.

[0037] It can be understood that the anchor rod body 10 is a homogeneous metal rod that can conduct electricity, and the resistivity of each section is approximately the same. Therefore, the length of the corresponding section of the anchor rod can be calculated by measuring the resistance value of the corresponding section of the anchor rod.

[0038] It is only necessary that the length of the test wire 20 is slightly greater than the length of the anchor rod body 10. That is, the difference between the length of the test wire 20 and the length of the anchor rod body 10 is greater than 10 cm, so as to ensure that the test wire 20 can be arranged at intervals with the anchor rod body 10 while ensuring that the test wire 20 has enough slack sections. For example, the difference between the length of the test wire 20 and the length of the anchor rod body 10 is 10 cm, 15 cm, 20 cm, etc.

[0039] Among them, the length of the calibration section 12 is greater than 4 cm, so as to expose the calibration section 12 outside the engineering structure.

[0040] In this embodiment, the length of the calibration section 12 is 5 cm, so as to calculate the length of the anchoring section 11 and improve the accuracy of the anchor rod length test.

[0041] It should be understood that the longer the length of the calibration section 12, the relatively more accurate the test structure. However, in the later process, the longer the cut-off part, resulting in waste of materials. Therefore, in this embodiment, the length of the calibration section 12 is set to 5 cm.

[0042] On this basis, this embodiment further includes a flexible protective sleeve 30, and the flexible protective sleeve 30 is sleeved outside the anchor rod body 10 to protect the calibration section 12 through the flexible protective sleeve 30.

[0043] Generally speaking, the flexible protective sleeve 30 is a PVC pipe, which is convenient for sleeving the flexible protective sleeve 30 on the calibration section 12 and removing it from the calibration section 12.

[0044] Moreover, during the construction process, the slack section of the test wire 20 is accommodated in the flexible protective sleeve 30 to protect the slack section of the test wire 20 through the flexible protective sleeve 30.

[0045] Correspondingly, this embodiment further includes a wire protective sleeve, and the wire protective sleeve is sleeved outside the test wire 20 to protect the test wire 20 through the wire protective sleeve, so as to avoid damaging the test wire 20 during the insertion of the anchor rod body 10 and the grouting construction of the anchor rod hole.

[0046] Similarly, the wire protective sleeve is made of PVC material to facilitate the protection of the test wire 20.

[0047] Specifically, the diameter of the wire protective sleeve is greater than 3 mm to ensure that the test wire 20 has a sufficient cross-sectional area to reduce the influence of the self-resistance of the test wire 20 on the test results. Usually, a 5-mm PVC pipe is used for protection.

[0048] Generally speaking, the anchor rod capable of measuring the length after installation provided in this embodiment includes an anchor rod body 10 and a test wire 20. The anchor rod body 10 includes a homogeneous anchoring section 11 and a calibration section 12 connected in sequence. The two ends of the test wire 20 are respectively electrically connected to the corresponding ends of the anchor rod body 10, and the length of the test wire 20 is greater than the length of the anchor rod body 10.

[0049] Continue to combine Figure 1 , during installation, insert the anchoring section 11 into the anchor rod hole, tension the test wire 20 located in the anchor rod hole and make the test wire 20 insulated from the side wall of the anchor rod body 10, and then grout to fix the anchoring section 11, and then perform subsequent construction operations. Since the length of the test wire 20 is greater than the length of the anchor rod body 10, at this time, the excess test wire 20 is located outside the engineering structure.

[0050] Combine Figure 2, when the length of the anchor bolt needs to be detected, first cut off the test wire 20 located outside the engineering structure, and use an ohmmeter 40 to test the resistance value of the entire anchor bolt, and at the same time test the resistance value of the calibration section 12 ( Figure 3 ). Since the anchoring section 11 and the calibration section 12 are of the same quality and the length of the calibration section 12 can be directly measured (or directly obtained), thus, the actual length of the anchoring section 11 can be calculated according to the resistance value of the entire anchor bolt, the resistance value of the calibration section 12, and the length of the calibration section 12.

[0051] Among them, since the length of the test wire 20 is greater than the length of the anchor bolt body 10, on the one hand, it can prevent the test wire 20 from being broken when grouting the anchor bolt hole, and on the other hand, it can make the test wire 20 relax outside the engineering structure, which is convenient for cutting the test wire 20 and connecting the test wire 20 to the ohmmeter.

[0052] In summary, the anchor bolt capable of measuring the length after installation provided by this embodiment can accurately obtain the length of the anchoring section 11, thus eliminating the behavior of cutting corners in the project, and further ensuring the construction quality of the retaining anchor bolt.

[0053] It can be understood that the anchor bolt capable of measuring the length after installation provided by this embodiment can be used in projects that require long anchor bolts for anchoring, such as tunnel support projects, slope protection projects, and surrounding rock fixing projects. Taking the tunnel support project as an example, the construction method of the anchor bolt provided by this embodiment is described, which specifically includes the following steps:

[0054] Step 1, after completing the construction of steel frames, steel bar meshes, etc., drill anchor bolt holes;

[0055] Step 2, install the anchor bolt and use a soft sleeve to protect the test wire 20;

[0056] Step 3, grout the anchor bolt hole;

[0057] Step 4, construct the shotcrete layer;

[0058] Step 5, before laying the waterproof cloth on the arch wall, remove the flexible protective sleeve 30 outside the calibration section 12, cut off the test wire 20 located outside the shotcrete layer, use an external ohmmeter 40 to test the resistance Ω1 of the entire anchor bolt, and then test the resistance Ω0 of the 5 cm calibration section 12;

[0059] Step 6, calculate the length L of the anchoring section by using the formula for the length of the anchoring section 11. The formula for the length of the anchoring section is:

[0060] Step 7, repeat steps 5 to 6 to measure the lengths of the anchoring sections of all the anchor bolts in the tunnel section in turn;

[0061] Step 8, replace the anchor bolts with insufficient length or non-compliant with the design requirements of the anchoring section 11.

[0062] After the bolt length test is completed, cut off the exposed part of the bolt (calibration section 12), and then carry out the waterproof layer construction such as laying the waterproof cloth on the arch wall and the secondary lining process.

[0063] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An anchor rod capable of measuring length after installation, characterized in that: include: An anchor rod body (10), the anchor rod body (10) comprising an anchoring section (11) and a marking section (12) connected in sequence and of the same quality; after installation, the anchoring section (11) is located in the anchor rod hole, and the marking section (12) is located outside the engineering structure; A test wire (20), both ends of which are electrically connected to corresponding ends of the anchor rod body (10), and the length of the test wire (20) is greater than the length of the anchor rod body (10).

2. The anchor rod capable of measuring length after installation according to claim 1, characterized in that: It also includes a flexible protective sleeve (30), which is sleeved outside the anchor rod body (10).

3. The anchor rod capable of measuring length after installation according to claim 2, characterized in that: The flexible protective sleeve (30) is a PVC tube.

4. The anchor rod capable of measuring length after installation according to claim 2, characterized in that: The slack section of the test lead (20) is accommodated in the flexible protective sleeve (30).

5. The anchor rod capable of measuring length after installation according to claim 1, characterized in that: It also includes a wire protection sleeve, which is sleeved outside the test wire (20).

6. The anchor rod capable of measuring length after installation according to claim 5, characterized in that: The wire protective cover is made of PVC material.

7. The anchor rod capable of measuring length after installation according to claim 5, characterized in that: The diameter of the wire protection sleeve is greater than 3 mm.

8. The anchor rod capable of measuring length after installation according to claim 1, characterized in that: The difference between the length of the test wire (20) and the length of the anchor rod body (10) is greater than 10 cm.

9. The anchor rod capable of measuring length after installation according to any one of claims 1 to 8, characterized in that: The length of the calibration section (12) is greater than 4 cm.

10. The anchor rod capable of measuring length after installation according to claim 9, characterized in that: The length of the calibration section (12) is 5 cm.

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