Anchor rod test protection device
By designing a protective device for anchor bolt testing, combining a sleeve with a flexible outer layer, the construction difficulties caused by exposed anchor bolts being covered by shotcrete were solved, achieving rapid, safe, and environmentally friendly construction progress and efficient test data.
Patent Information
- Application Number
- CN202520498226.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-20
AI Technical Summary
In anchor-sprayed support construction, the exposed threaded rods of the anchor bolts are difficult to clean after being covered by sprayed concrete, resulting in high construction difficulty, slow progress, high input of manpower and equipment, significant safety hazards, and inaccurate test data.
Design an anchor bolt test protection device, including a sleeve, a handle, and a flexible outer layer. The sleeve is threaded to the exposed thread of the anchor bolt via a nut. The flexible outer layer is a plastic woven bag used to protect the exposed part of the anchor bolt from being covered by shotcrete. It can be quickly removed after installation.
This enables rapid, safe, and environmentally friendly construction of anchor bolt tests, reduces construction difficulty and labor and equipment input, and improves the accuracy of test data and construction progress.
Smart Images
Figure CN223908237U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an anchor rod, especially an anchor rod test protection device for all anchor rod anchor pad anchor spray support engineering construction. BACKGROUND
[0002] In anchor spray support construction, the anchor rod exposed screw rod is exposed to the rock surface about 10cm, after the anchor pad and bolt installation, the spray concrete is covered. After the anchor rod construction is completed, the part anchor rod needs to be selected for the later drawing and other related tests, and the spray concrete support is needed during the period. In the conventional construction, after the spray concrete, the anchor rod position is manually searched, the spray concrete around the anchor rod is chipped, the exposed screw rod of the anchor rod is cleaned and then the related test work is carried out. The construction difficulty is great, the manual time is long, the equipment investment is increased. The concrete covering the screw rod is difficult to chip clean, if the cleaning is excessive, the screw rod is damaged, the anchor rod drawing test device installation is difficult, and the anchor rod drawing test device is easily detached during use, the anchor rod drawing test device needs to be installed and fixed many times, the test data accuracy is low; especially when the anchor rod drawing test is carried out at the hole top and high slope, the personnel and equipment safety cannot be guaranteed, and the safety hidden danger is great. CONTENT OF THE UTILITY MODEL
[0003] The utility model solves the technical problem that the anchor rod end (screw rod) is covered by the spray concrete and is difficult to chip, the construction progress is slow, the manual equipment investment is large, the anchor rod drawing test device is repeatedly installed and fixed, the safety hidden danger is great, and a series of problems such as the test data inaccuracy are efficiently and quickly solved.
[0004] To solve the above technical problem, the utility model adopts the technical scheme that:
[0005] An anchor rod test protection device, including the sleeve, the sleeve lower end is inserted into the anchor rod and is connected with the anchor rod exposed screw rod through the nut, the sleeve upper end is stretched out of the spray concrete.
[0006] The sleeve upper end is installed with the handle.
[0007] The flexible outer wrapping layer is arranged between the sleeve and the spray concrete.
[0008] The flexible outer wrapping layer is the plastic woven bag.
[0009] The sleeve is the steel pipe and one end is closed, and the handle is the reinforcing steel bar.
[0010] The sleeve, the handle and the nut are welded into a whole.
[0011] The full welding or the connecting block even circumferential interval welding is adopted between the nut and the sleeve.
[0012] The utility model provides a kind of anchor rod test protection device, with the following technical effects:
[0013] 1), the anchor rod installation protection device of selection needs to do test, before test, twist reinforcement handle can remove this protection device, anchor rod exposed part is not polluted by shotcrete, can directly carry out relevant test work.
[0014] 2), this protection device can directly position anchor rod position, avoid finding anchor rod after covering by spraying concrete, effectively protect the exposed part of anchor rod, ensure that test is rapidly, accurately carried out.
[0015] 3), the device can realize the quick, safe, environmental protection construction of shotcrete support, speed up the overall construction progress of project, reduce labor and equipment investment, save engineering investment. DRAWINGS
[0016] The utility model is further described below in connection with drawings and examples:
[0017] Fig. 1 It is the front view of the utility model.
[0018] Fig. 2 It is the plan view of the utility model.
[0019] In the drawing: sleeve pipe 1, handle 2, nut 3, shotcrete 4, anchor rod exposed screw rod 5, flexible outer wrapping layer 6. CONCRETE EMBODIMENT
[0020] As Figs. 1-2 Indicated, a kind of anchor rod test protection device, including sleeve pipe 1, handle 2, nut 3, flexible outer wrapping layer 6.
[0021] Sleeve pipe 1 selects a section long about 35cm steel pipe, steel pipe one end is closed, can avoid shotcrete material to enter, cover screw rod 5. In the top about 6cm of steel pipe, horizontal perforation and weld a long about 32cm reinforcing bar as handle 2, handle 2 is convenient to rotate. Steel pipe other end portion is welded with the nut 3 of anchor rod exposed screw rod 5 matched, can avoid falling off when shotcrete impact or stone blasting vibration, effectively eliminates security risk. Install this protection device, can avoid that screw rod 5 is covered by shotcrete to thereby post-experimental when chisel and remove difficult, reduce construction difficulty, speed up construction progress.
[0022] Sleeve pipe 1 outer wrapping plastic woven bag as flexible outer wrapping layer 6. Flexible outer wrapping layer 6 avoids that shotcrete 4 solidifies on sleeve pipe (1), reduces the difficulty of protection device removal.
[0023] After anchor rod insertion rod, grouting are completed, before shotcrete, install this protection device in the anchor rod end (screw rod) of needing to do pull-out test, can avoid that screw rod is covered by shotcrete.
[0024] Before the anchor rod is anchored, the construction personnel first removes the flexible outer layer 6, and then twists the handle 2 to remove the protection device. When the anchor rod pull-out test device is installed, the construction personnel does not need to chisel the sprayed concrete covering the wire rod, which reduces the construction difficulty and speeds up the construction progress. The deformation of the wire rod caused by excessive cleaning of the concrete is avoided, and the anchor rod pull-out test efficiency and the accuracy of the test data are improved. The anchor support construction is fast, safe, and environmentally friendly, which speeds up the overall construction progress of the project, reduces labor and equipment investment, and saves engineering investment.
[0025] Working principle and process: Select the sleeve 1, handle 2, and nut 3 matched with the exposed wire rod 5 of the anchor rod to weld an anchor rod test protection device. After the support anchor rod is inserted and grouting is completed, the protection device is installed on the anchor rod that needs to be tested before the sprayed concrete 4 is sprayed. Before the anchor rod is anchored, the construction personnel only needs to twist the handle 2 to quickly remove the protection device and directly install the anchor rod pull-out test device without chiseling the concrete covering the wire rod.
Claims
1. An anchor rod test protection device, characterized by: The invention relates to a concrete injection sleeve (1) for anchoring a rock bolt (5) in a rock mass.
2. An anchor rod test protection device according to claim 1, characterised in that: A handle (2) is arranged on the upper end of the sleeve (1).
3. An anchor rod test protection device according to claim 2, characterised in that: A flexible outer layer (6) is arranged between the sleeve (1) and the concrete (4).
4. An anchor rod test protection device according to claim 3, characterised in that: The flexible outer layer (6) is a plastic woven bag.
5. An anchor rod test protection device according to claim 4, characterised in that: The sleeve (1) is a steel pipe with one end closed, and the handle (2) is a steel bar.
6. An anchor rod test protection device according to claim 5, characterised in that: The sleeve (1), the handle (2) and the nut (3) are welded together.
7. An anchor rod test protection device according to claim 6, characterised in that: Full welding or evenly spaced welding around the circumference is used between the nut (3) and the sleeve (1).