Device for testing splitting edge distance of anchor bolt
By combining a support base plate and fixing components, the problem of concrete warping during anchor bolt splitting distance testing is solved, achieving stable testing and accurate data acquisition, and making it suitable for engineering applications of large-size anchor bolts.
Patent Information
- Application Number
- CN202423201242.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing anchor bolt splitting distance testing devices are prone to causing concrete to warp during testing, affecting the test results. Furthermore, large-diameter anchor bolts are difficult to fix, which cannot meet the needs of projects with limited space.
It adopts a combination structure of supporting base plate, concrete base, pull-out instrument, fixing components and supporting components. Through the cooperation of short cross fixing plate and multiple fixing rods with precast ground anchors, it ensures the stable fixation of anchor bolts at the concrete edge, avoids lifting and is suitable for testing large-size anchor bolts.
It enables stability testing at concrete edges, obtains more accurate load and displacement data, saves space and avoids damage to the laboratory floor, and is suitable for testing large-size anchor bolts.
Smart Images
Figure CN223711213U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of anchor bolt, especially relates to a device for anchor bolt splitting margin test. BACKGROUND
[0002] During the installation of the anchor bolt, torque is applied to the anchor bolt, which forms a stress concentration area at the bottom of the anchor rod. The concrete is usually a rigid structure. When the anchor bolt is installed at the edge of the concrete, the large stress concentration usually causes cracks in the concrete structure, and even forms an undesirable effect of corner crack splitting. In severe cases, it can easily cause permanent damage to the concrete structure, affecting the safety of the engineering structure.
[0003] In the existing anchor bolt specification, the splitting distance of the anchor bolt installed at the edge of the concrete is uniformly regulated: under the condition of meeting the relevant product standards and the relevant provisions of the regulation, 3hef is taken. This provision usually adopts a large safety factor to ensure the safety of the construction structure under the premise of ensuring the safety of the engineering structure. Therefore, in the actual engineering scene, the safety splitting margin specified in the specification is usually required to have a larger area of concrete site under the condition of fixed anchoring point, which is usually not conducive in some engineering construction scenes with limited space. In addition, in the scene with limited construction area, a larger splitting edge distance usually also indicates that the anchoring points in the middle part need to be reduced to meet the requirements of the specification, which also leads to the reduction of anchoring points and affects the stress points of the engineering structure. In the same concrete construction engineering scene, a smaller splitting edge distance is usually more competitive.
[0004] At present, there are few projects on splitting test on the market. The existing technical scheme is to fix the concrete under pressure through an I-shaped steel structure, set an anchor pullout instrument on the I-shaped steel, and record the load and displacement of the anchor by continuously changing the distance between the anchor and the edge, to determine the distance of the anchor splitting edge distance. The problem of this structure is that the anchor usually generates a tensile force much larger than the pressure of the concrete structure during the pulling process, which easily causes the concrete to lift during the test, affecting the test results. In addition, during the test of large-size anchor bolts, large-size anchor bolts usually require larger fixed bases, which easily causes the problem that the test equipment cannot be fixed. UTILITY MODEL CONTENTS
[0005] To solve the above problems, the utility model provides a device for anchor bolt splitting margin test, which can obtain more accurate load and displacement data of the expanding anchor bolt.
[0006] To this end, the technical scheme of the utility model is: a device for anchor splitting margin test, including support base plate, concrete base, pullout tester, fixed component and support component, the support base plate is equipped with a plurality of first threaded ground anchor and second threaded ground anchor, and the concrete base is placed above the support base plate, the support component includes at least two groups of support plate and first fixed rod, one end of the support plate is pressed on the concrete base, the other end is equipped with the first through hole for the first fixed rod to pass through, and the bottom end of the first fixed rod is fixedly connected with the first threaded ground anchor, the pullout tester is erected on the support plate, and the pullout tester is opposite to the concrete base below, the fixed component includes at least two groups of fixed plate and second fixed rod, one end of the fixed plate is pressed on the concrete base, the other end is equipped with the second through hole for the second fixed rod to pass through, and the bottom end of the second fixed rod is fixedly connected with the second threaded ground anchor on the support base plate.
[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the fixed plate is pressed on the two adjacent edges of the concrete base respectively, the two fixed plates are located on the two sides of the two support plates, and the fixed plate and the edge of the concrete base are perpendicular to each other.
[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the second through hole of the fixed plate is equipped with the second fastening nut on the upper side and the lower side, and the second fastening nut is fixedly connected with the second fixed rod through threads.
[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the first through hole of the support plate is equipped with the first fastening nut below, and the first fastening nut is fixedly connected with the first fixed rod through threads.
[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: the support plate and the fixed plate are both square steel pipe structures, and the first fixed rod and the second fixed rod are screw rod structures.
[0011] When in use:
[0012] 1) cast the concrete plate as the support base plate in advance, and place the threaded ground anchor stably in the pouring formwork through the woodworking positioning mode during pouring, to ensure that the impact of mortar during pouring does not change the position of the ground anchor;
[0013] 2) drill holes on the concrete base, install test anchors, and place the anchors in the holes of the drilled holes before the installation of the anchors, to complete the installation of the anchors through standard installation procedures;
[0014] 3) place the test concrete base on the support base plate stably through the tower crane;
[0015] 4) After the concrete base is placed, the fixed plate and the second fixed rod are made into a cross-shaped fixed structure, the fixed plate is pressed on the concrete base, and the second fixed rod is fixed on the threaded anchor; a locking nut is arranged above and below the position where the fixed plate and the second fixed rod are connected;
[0016] 5) After the concrete base is fixed, the support plate and the first fixed rod are placed, the support plate has a wider width, so that the pull-out tester can run stably during the test, and a single locking nut is connected on the support plate and the first fixed rod, so that the support plate can be stably supported on the concrete base.
[0017] 6) After the entire test device is fixed, the pull-out tester is operated, and more accurate load and displacement data can be obtained.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] 1. The fixed plate and the second fixed rod in the short cross structure are arranged on the concrete base, so that the base material does not have the problem of corner lifting, and the anchor point required by the support foot of the single-side rod is less, and space is saved.
[0020] 2. The cooperation of the multiple fixed rods and the prefabricated ground anchor can ensure that the test machine runs stably outside the concrete edge, and is especially suitable for application testing of large-size anchor bolt products.
[0021] 3. The prefabricated concrete plate is used as the support bottom plate, so that the damage of the laboratory ground caused by the huge load in the test process can be effectively avoided. At the same time, the prefabricated ground anchor can be arranged by positioning in advance, so that the displacement of the test base material and the fixed device in the test process can be effectively avoided to affect the test result. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is a structural schematic view of the utility model;
[0023] Figure 2 It is a structural schematic view of the support bottom plate of the utility model.
[0024] In the figure, the marks are: support bottom plate 1, first threaded ground anchor 11, second threaded ground anchor 12, concrete base 2, pull-out tester 3, support plate 4, first fixed rod 5, fixed plate 6, second fixed rod 7, and second fastening nut 8. DETAILED DESCRIPTION
[0025] In the description of the utility model, it is necessary to explain that, for the direction words, if the terms "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 drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the utility model.
[0026] In addition, if the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the "first", "second" features can be explicitly or implicitly included one or more features, and in the description of the utility model, the meaning of "several", "several" is two or more than two, unless otherwise explicitly specified.
[0027] Referring to the drawings. The anchor splitting edge test device described in this embodiment comprises a support base plate 1, a concrete base 2, a pullout instrument 3, a fixing assembly and a supporting assembly, a plurality of first threaded ground anchors 11 and second threaded ground anchors 12 are arranged on the support base plate 1, and the concrete base 2 is arranged above the support base plate 1.
[0028] The supporting assembly comprises at least two groups of supporting plates 4 and first fixing rods 5, the supporting plate 4 is a square steel pipe structure, and the first fixing rod 5 is a screw rod structure. One end of the supporting plate 4 is pressed on the concrete base 2, the other end is provided with a first through hole for the first fixing rod 5 to pass through, and the bottom end of the first fixing rod 5 is fixedly connected with the first threaded ground anchor 11. A first fastening nut is arranged below the first through hole of the supporting plate 4, and the first fastening nut is fixedly connected with the first fixing rod 5 in a threaded manner. The pullout instrument 3 is arranged on the supporting plate 4, and the pullout instrument 3 is opposite to the concrete base 2 below.
[0029] The fixing assembly comprises at least two groups of fixing plates 6 and second fixing rods 7, the fixing plate 6 is a square steel pipe structure, and the second fixing rod 7 is a screw rod structure. One end of the fixing plate 6 is pressed on the concrete base 2, the other end is provided with a second through hole for the second fixing rod 7 to pass through, and the bottom end of the second fixing rod 7 is fixedly connected with the second threaded ground anchor 12 on the support base plate 1. The fixing plate 6 is pressed on the adjacent two edges of the concrete base 2, the two fixing plates 6 are located on the two sides of the two supporting plates 4, and the fixing plate 6 and the edge of the concrete base 2 are perpendicular to each other. Second fastening nuts 8 are arranged on the upper and lower sides of the second through hole of the fixing plate 6, and the second fastening nuts 8 are fixedly connected with the second fixing rod 7 in a threaded manner.
[0030] In use:
[0031] 1) Pour the concrete slab as the support base 1 in advance, and place the threaded anchor firmly in the pouring form through the carpentry positioning method during pouring, so as to ensure that the impact of the mortar during pouring cannot change the position of the anchor; by pre-pouring the threaded anchor in the concrete block, different sizes of the concrete block and the position of the anchor can be set according to different test conditions, so that the position parameters of the test can be effectively changed, and the tester can determine the test information by recording the position of the anchor number.
[0032] 2) Drill holes in the concrete base 2, and install the test anchor, which is placed in the hole drilled before the anchor is installed, and the installation of the anchor is completed through the standard installation procedure.
[0033] 3) Place the test concrete base 2 on the support base 1 stably through the tower crane.
[0034] 4) After the concrete base 2 is placed, the fixed plate 6 and the second fixed rod 7 are made into a cross-shaped fixed structure, the fixed plate 6 is pressed on the concrete base 2, the second fixed rod 7 is fixed on the threaded anchor, and the fixed plate must be arranged within a distance of 0.5 times the side length of the concrete block; the short cross-shaped fixing method not only enables the concrete to achieve perfect anti-uplift function, but also enables only one anchor point to achieve the supporting effect due to the design of the single-side rod.
[0035] Lock nuts 8 are arranged above and below the position where the fixed plate 6 and the second fixed rod 7 are connected, and when the height needs to be adjusted, the lower nut can be adjusted by being screwed upwards to adjust the position of the fixed plate. When the concrete base needs to be stably fixed, the upper nut is tightened, so that the cross-shaped fixing device can firmly fix the concrete base.
[0036] 5) After the concrete base 2 is fixed, the support plate 4 and the first fixed rod 5 are placed, the support plate 4 has a wider width, so as to ensure that the pull-out tester runs stably during the test, and a single lock nut is connected on the support plate 4 and the first fixed rod 5, so that the support plate 4 can be stably supported on the concrete base 2.
[0037] 6) After the entire test device is fixed, the pull-out tester 3 is operated to obtain more accurate load and displacement data.
[0038] The above only describes preferred embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments. Any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the present application are also considered to be within the protection scope of the present application.
Claims
1. A device for testing the splitting edge distance of anchor bolts, characterized in that: The device includes a supporting base plate, a concrete base, a pull-out device, a fixing assembly, and a supporting assembly. The supporting base plate is provided with a plurality of first threaded anchors and second threaded anchors, and the concrete base is placed above the supporting base plate. The supporting assembly includes at least two sets of supporting plates and a first fixing rod. One end of the supporting plate is pressed onto the concrete base, and the other end is provided with a first through hole for the first fixing rod to pass through. The bottom end of the first fixing rod is fixedly connected to the first threaded anchor. The pull-out device is mounted on the supporting plate, with its lower end facing the concrete base. The fixing assembly includes at least two sets of fixing plates and a second fixing rod. One end of the fixing plate is pressed onto the concrete base, and the other end is provided with a second through hole for the second fixing rod to pass through. The bottom end of the second fixing rod is fixedly connected to the second threaded anchor on the supporting base plate.
2. The device for testing the splitting edge distance of anchor bolts as described in claim 1, characterized in that: The fixing plates are respectively pressed on the two adjacent edges of the concrete base. The two fixing plates are located on both sides of the two support plates, and the fixing plates are perpendicular to the edges of the concrete base.
3. The device for testing the splitting distance of anchor bolts as described in claim 1, characterized in that: The second through hole of the fixing plate is provided with a second fastening nut on both the upper and lower sides, and the second fastening nut is fixedly connected to the second fixing rod by thread.
4. The device for testing the splitting distance of anchor bolts as described in claim 1, characterized in that: A first fastening nut is provided below the first through hole of the support plate, and the first fastening nut is fixedly connected to the first fixing rod by threads.
5. The device for testing the splitting edge distance of anchor bolts as described in claim 1, characterized in that: Both the support plate and the fixing plate are square steel pipe structures, and the first fixing rod and the second fixing rod are screw structures.