Testing device for measuring minimum edge spacing of anchor bolt

Abstract

The utility model discloses a testing device for measuring the minimum edge spacing of an anchor bolt, which comprises a concrete bottom plate, two testing plates and a sliding guide rod, and a longitudinal anchor hole and at least one horizontally penetrating sliding hole are formed in each testing plate; the sliding guide rod penetrates through the sliding holes of the two test plates and is fixed through a locking nut; the testing anchor bolts penetrate through the anchor holes, and the testing plate is fixed to the concrete bottom plate. According to the utility model, the prefabricated concrete plate is used as the test bottom plate, and the measuring holes are formed in the concrete bottom plate in an advanced positioning manner, so that the influence of displacement of a test base material and a fixing device on a test result in a test process is effectively avoided, the actual field working condition is simulated by generating irreversible damage, and the accuracy of test data is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anchor bolt, especially relates to a test device for measuring the minimum edge distance of anchor bolt. BACKGROUND

[0002] In the process of installing the existing concrete structure, in order to speed up the construction progress, the construction party usually installs by using the torque far greater than the torque specified by the manufacturer when the anchor bolt is applied to the torque. However, this operation is easy to cause cracks between adjacent anchor bolts, therefore, the installation distance of the anchor bolt needs to be tested under high torque before the anchor bolt is installed.

[0003] At present, the test scheme of the anchor bolt is to apply 1.7 times torque to the anchor bolt, and then observe whether cracks occur between adjacent anchor bolts, and the value of the edge distance is judged by the generation of the cracks. In the test process, the cracks are observed by applying a fixed torque, but if the current anchor bolt is at a critical value, although it is judged to be qualified because no cracks are generated, it still has a certain safety risk, and there are other non-related test conditions that can cause no cracks. SUMMARY

[0004] In order to solve the above problems, the utility model provides a test device for measuring the minimum edge distance of anchor bolt, which simulates the actual installation damage working condition of the anchor bolt through destructive test, and is used for obtaining the minimum edge distance in the process of installing the anchor bolt, and ensuring the safety of anchoring construction.

[0005] Therefore, the technical scheme of the utility model is: a test device for measuring the minimum edge distance of anchor bolt, comprising a concrete bottom plate, two test plates and a sliding guide rod, a longitudinal anchor hole and at least one horizontal sliding hole are arranged on the test plate; the sliding guide rod passes through the sliding holes of the two test plates and is fixed by a locking nut; a test anchor bolt passes through the anchor hole, and the test plate is fixed on the concrete bottom plate.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the inner diameter of the anchor hole on the test plate is greater than the outer diameter of the test anchor bolt.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: a plurality of test holes are arranged on the concrete bottom plate, a first test plate is fixed on a first test hole by a first anchor bolt, and a second test plate is moved to any one of the remaining test holes along the sliding guide rod and is fixed on the concrete bottom plate by a second anchor bolt.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the test plate is a square structure, two horizontal sliding holes are arranged on the test plate, and two mutually parallel sliding guide rods pass through the two sliding holes in sequence.

[0009] As a preferred scheme of the above scheme and on the basis of the above scheme: the test plate is provided with locking nuts on both sides, and the sliding guide rod is provided with external threads and is in threaded connection with the locking nuts.

[0010] In use:

[0011] 1) First, drill holes in the concrete base plate, and the positions of the holes are pre-set;

[0012] 2) Pass the first anchor bolt through the anchor hole in the first test plate, fix the first anchor bolt on the concrete base plate, adjust the orientation of the first test plate so that the sliding guide rod is parallel to the edge of the concrete base plate, and then fix the position of the sliding guide rod and the first test plate by the locking nuts;

[0013] 3) Move the second test plate along the sliding guide rod to one of the hole positions on the concrete plate, and fix the second test plate on the concrete base plate by the second anchor bolt;

[0014] 4) Apply torque to the second anchor bolt in steps of 0.2 times the standard torque, and when a destructive crack is generated on the concrete plate, record the torque value finally displayed by the torque wrench;

[0015] 5) If the recorded torque value is too small or too large and differs greatly from the high torque used in construction, remove one of the concrete base plates, repeat steps 1) to 2), and then move the second test plate to the positions of the remaining holes on the concrete plate to measure the torque value that can be borne by the second anchor bolt at the distance;

[0016] 6) After multiple measurements, select the position of the second anchor bolt at which the torque value meets the requirements, and take the edge distance measured at the position as the minimum edge distance of the anchor bolt.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The prefabricated concrete plate is used as the test base plate, the measurement holes are set on the concrete base plate in advance, the displacement of the test base material and the fixing device during the test is effectively avoided, the actual site working condition is simulated by generating irreversible damage, and the accuracy of the test data is ensured.

[0019] 2. The rigid square plate is used as the test plate, the stress generated by the anchor bolt during pre-tightening can be controlled, the anchor bolt is subjected to more uniform stress through the larger anchor hole and the standard rigid plate, and the parallelism of the two test plates is ensured by the sliding guide rod, the alignment operation of the test plate is omitted, the test steps are simplified, and convenience and efficiency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2The utility model discloses a test board structure schematic view.

[0022] Figure 3 The utility model discloses a test board structure plan view.

[0023] Marked in the drawing: concrete bottom plate 1, first test board 2, second test board 3, sliding guide 4, first anchor bolt 5, second anchor bolt 6, lock nut 7, anchor hole 8, destructive crack 9. DETAILED DESCRIPTION

[0024] In the description of the utility model, it is to explain that for the orientation word, if the term "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of narrating the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, structure and operation, and can not be understood as limiting the specific protection scope of the utility model.

[0025] In addition, if the term "first", "second" is only used for the description purpose, and can not be understood as indicating or implying the relative importance or implicitly indicating the number of technical features. Therefore, the "first", "second" feature can be explicitly or implicitly included one or more features, and the meaning of "several", "several" in the description of the utility model is two or more than two, unless otherwise specifically limited.

[0026] Referring to the drawings. The test device for measuring the minimum edge spacing of anchor bolt described in the embodiment comprises a concrete bottom plate 1, a first test board 2, a second test board 3 and a sliding guide 4, a plurality of test holes are arranged on the concrete bottom plate 1, the first test board 2 is fixed on the first test hole through the first anchor bolt 5, the second test board 3 can be moved to any test hole along the sliding guide 4, and then is fixed on the concrete bottom plate 1 through the second anchor bolt 6, and the position of the second anchor bolt is adjusted according to the test result.

[0027] The test board is of square structure, two horizontally arranged sliding holes are arranged on the test board, and two mutually parallel sliding guides 4 pass through the two sliding holes in sequence. The sliding guide 4 passes through the sliding holes of the two test boards; the sliding guide 4 is provided with external threads, lock nuts 7 are arranged on the two sides of the test board, the lock nuts 7 are locked and matched with the sliding guide 4 through threads, and the positions of the first test board 2, the second test board 3 and the sliding guide 4 are fixed.

[0028] The first test plate 2 and the second test plate 3 are provided with a longitudinal anchor hole 8, and the test anchor bolt passes through the anchor hole 8 to fix the first test plate 2 and the second test plate 3 on the concrete bottom plate 1. The inner diameter of the anchor hole on the first test plate 2 and the second test plate 3 is greater than the outer diameter of the test anchor bolt. According to the application mode, for example, drilling and increasing torque, the anchor rod is usually prone to slight deformation when these operations or settings are performed. By setting a larger anchor hole, the anchor rod can obtain a better deformation space when performing the test test. Additionally, when the test test produces a destructive result, the larger anchor hole is also more conducive to the generation of cracks. When the anchor hole is smaller than or consistent with the anchor rod, the stress effect generated during installation cannot be timely offset by the concrete, and when the torque is applied, the cracks will appear earlier or later, which is not conducive to the judgment of the test result. The larger anchor hole can be more conducive to controlling the influence of the prestress in the concrete, so that the friction and locking force generated by the anchor rod in the longitudinal movement are more evenly applied to the concrete.

[0029] In use:

[0030] 1) First drill holes on the concrete bottom plate 1, and the positions of the holes are pre-set;

[0031] 2) The first anchor bolt 5 passes through the anchor hole 8 on the first test plate 2 to fix it on the concrete bottom plate 1, and the orientation of the first test plate 2 is adjusted so that the sliding guide rod 4 is parallel to the edge of the concrete bottom plate 1, and then the position of the sliding guide rod 4 and the first test plate 2 is fixed by the locking nut 7;

[0032] 3) The second test plate 3 is moved to one of the hole positions on the concrete bottom plate 1 along the sliding guide rod 4, and the second anchor bolt 6 fixes the second test plate 3 on the concrete bottom plate 1;

[0033] 4) The second anchor bolt 6 is applied with a torque of 0.2 times the standard torque in steps, and when the destructive crack 9 is generated on the concrete bottom plate 1, the torque value finally displayed by the torque wrench is recorded;

[0034] 5) If the recorded torque value is too small or too large, and the difference with the high torque used during construction is large, then remove one of the concrete bottom plates, repeat steps 1) to 2), and then move the second test plate 3 to the positions of the remaining holes on the concrete bottom plate 1 to measure the torque value that the second anchor bolt can withstand at that distance;

[0035] 6) After multiple measurements, select the position of the second anchor bolt when the torque value meets the requirements, and use the edge distance measured at this position as the minimum edge distance of the anchor bolt.

[0036] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A test apparatus for measuring the minimum side spacing of anchor bolts, characterized in that: The device includes a concrete base slab, two test plates, and a sliding guide rod. Each test plate has a longitudinal anchor hole and at least one horizontal through-hole. The sliding guide rod passes through the sliding holes of the two test plates and is fixed by a lock nut. Test anchor bolts pass through the anchor holes to fix the test plates to the concrete base slab.

2. The test device for measuring the minimum side spacing of anchor bolts as described in claim 1, characterized in that: The inner diameter of the anchor hole on the test plate is larger than the outer diameter of the test anchor bolt.

3. The test device for measuring the minimum side spacing of anchor bolts as described in claim 1, characterized in that: The concrete base plate is provided with several test holes. The first test plate is fixed to the first test hole by the first anchor bolt. The second test plate moves along the sliding guide rod to any other test hole and is fixed to the concrete base plate by the second anchor bolt.

4. The test device for measuring the minimum side spacing of anchor bolts as described in claim 1, characterized in that: The test board has a square structure and two horizontally arranged sliding holes. Two parallel sliding guide rods pass through the two sliding holes in sequence.

5. The test device for measuring the minimum side spacing of anchor bolts as described in claim 1, characterized in that: Both sides of the test plate are equipped with locking nuts, and the sliding guide rod is provided with external threads that are threadedly engaged with the locking nuts.

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