Jack supporting device for effective prestress detection under bridge anchor

Abstract

The utility model relates to the field of bridge detection tools, in particular to a jack supporting device for effective prestress detection under a bridge anchor. The jack supporting device for detecting the effective prestress under the bridge anchor comprises a supporting structure body, a first cavity is formed in the bottom of the supporting structure body, and an anchorage device is arranged in the first cavity; a second cavity is arranged above the first cavity; an annular bulge is arranged between the first cavity and the second cavity; the second cavity is communicated with the first cavity; the device further comprises a supporting block. The supporting block is arranged in the second cavity and detachably connected with the supporting structure body. At least one through hole is formed in the supporting block; the through hole is communicated with the upper part of the supporting structure main body and the first cavity; and a steel strand passes through the through hole. The device can be suitable for detection objects of various different specifications, and ensures that the pressure of the jack is not applied to the clamping piece in the detection process.

Description

Technical Field

[0001] This utility model relates to the field of bridge inspection tools, and in particular to a jack support device for detecting effective prestress under bridge anchors. Background Technology

[0002] In the effective prestress testing of bridge anchorages, jacks are used to stretch the steel strands on the beam. The testing involves anchorages fixed to the beam and wedges fixed to the steel strands. The steel strands extend from the beam and pass through the anchorages and wedges in sequence. When stretching the steel strands with jacks, the jacks need to press against the anchorages while ensuring the wedges can move with the steel strands. In practice, an anchor pad is usually placed between the anchorage and the jack to apply pressure only to the anchorage, preventing the jack from pressing on the wedges. However, due to differences in anchor specifications used during on-site construction, the anchor pads may not be perfectly matched, or the openings on the anchor pads may not match the position or number of steel strands on the anchorage, causing the wedges to frequently be pressed by the anchor pads. Bringing multiple sizes of anchor pads to the site also presents the problem of their weight and inconvenience.

[0003] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a jack support device for detecting effective prestress under bridge anchors, which aims to solve the technical problem of poor versatility of anchor pads in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A jack support device for detecting effective prestress under bridge anchors includes a main support structure. A first cavity is located at the bottom of the main support structure for inserting an anchor. A second cavity is located above the first cavity. An annular protrusion is located between the first and second cavities. The second cavity communicates with the first cavity. The device also includes a support block disposed within the second cavity and detachably connected to the main support structure. At least one through hole is provided on the support block, connecting the top of the main support structure and the first cavity. The through hole allows steel strands to pass through.

[0007] The jack support device for detecting effective prestress under bridge anchors further includes multiple first fixing structures, which are detachably connected to the main body of the support structure and are used to fix the main body of the support structure to the anchor.

[0008] The jack support device for detecting effective prestress under bridge anchors includes a plurality of first threaded holes arranged circumferentially on the periphery of the bottom of the main support structure; the first threaded holes are arranged laterally and penetrate the periphery of the bottom of the main support structure; the first fixing structure is screwed to the first threaded holes.

[0009] The jack support device for detecting effective prestress under bridge anchors, wherein the first fixing structure includes a screw part and a handle part fixedly connected to one end of the screw part.

[0010] The jack support device for detecting effective prestress under bridge anchors includes at least three first threaded holes, which are circumferentially equidistant.

[0011] The jack support device for detecting effective prestress under bridge anchors further includes at least one second fixing structure; at least one second threaded hole is provided circumferentially on the peripheral wall of the second cavity; the second threaded hole penetrates the peripheral wall of the second cavity; the second fixing structure is screwed to the second threaded hole and passes through the second threaded hole to abut against the support block.

[0012] The jack support device for detecting effective prestress under bridge anchors, wherein the through hole is a cross-shaped hole.

[0013] The jack support device for detecting effective prestress under bridge anchors includes four through holes, which are equidistantly arranged circumferentially with the axis of the main support structure as the center.

[0014] Beneficial Effects: This utility model provides a jack support device for detecting effective prestress under bridge anchors. The support device has an annular protrusion inside for contacting the edge of the anchor, preventing it from pressing on the clamp in the middle of the anchor. Simultaneously, by providing detachable support blocks on the main support structure, it is convenient to carry one main support structure and multiple small support blocks of different specifications during actual operation. The overall weight is small, and the specifications of the support blocks can be flexibly adjusted according to site requirements to accommodate different specifications of anchors, clamps, and steel strands on site. Attached Figure Description

[0015] Figure 1 Schematic diagram of the jack support device Figure 1 .

[0016] Figure 2 Schematic diagram of the jack support device Figure 2 .

[0017] Figure 3 Schematic diagram of the jack support device Figure 3 .

[0018] Figure 4 This is a reference diagram showing the usage status of the jack support device.

[0019] Explanation of main component symbols: 1-Main support structure, 11-First cavity, 12-Second cavity, 13-Annular protrusion, 2-Support block, 21-Through hole, 14-First fixing structure, 15-First threaded hole, 141-Screw part, 142-Handle part, 16-Second fixing structure, 17-Second threaded hole, 3-Anchor, 4-Clamping plate, 5-Steel strand, 7-Jack. Detailed Implementation

[0020] This utility model provides a jack support device for detecting effective prestress under bridge anchors. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes the utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0022] Please see Figure 1 , Figure 2 and Figure 4 This utility model provides a jack support device for detecting effective prestress under bridge anchors, including a support structure body 1. The bottom of the support structure body 1 is provided with a first cavity 11 for inserting an anchor 3. A second cavity 12 is provided above the first cavity 11. An annular protrusion 13 is provided between the first cavity 11 and the second cavity 12. The second cavity 12 is connected to the first cavity 11. It also includes a support block 2. The support block 2 is disposed in the second cavity 12 and is detachably connected to the support structure body 1. The support block 2 is provided with at least one through hole 21. The through hole 21 connects the top of the support structure body 1 and the first cavity 11. The through hole 21 is used for steel strand 5 to pass through.

[0023] In use, the jack support device of this utility model is placed between the anchor 3 and the jack 7. Specifically, the first cavity 11 is cylindrical and has the same shape as the anchor 3. The main body of the support structure 1 is first fitted onto the anchor 3, and its annular protrusion 13 connects with the edge of the side wall of the anchor 3 to transmit pressure. The steel strand 5 and the clamping piece 4 on it are located inside the first cavity 11 and will not be pressed by the annular protrusion 13. After the main body of the support structure 1 is installed, the support block 2 can be further installed. First, the steel strand 5 is passed through the through hole 21 on the support block 2. Then, the support block 2 moves along the steel strand 5 and is finally placed into the second cavity 12 and pressed against the outer wall of the annular protrusion 13. The support block 2 can have various specifications to correspond to different situations. For example, some anchors 3 have four steel strands 5, so a support block 2 with four through holes 21 is selected to be used in conjunction with the main body of the support structure 1.

[0024] Specifically, the diameter of the through hole 21 is larger than the diameter of the clamp 4 to ensure that it does not affect the movement of the clamp 4.

[0025] Preferably, both the second cavity 12 and the support block 2 are cylindrical and compatible for use. The cylindrical shape of the second cavity 12 and the support block 2 allows for assembly regardless of the angle of rotation of either one.

[0026] Please see Figure 1 In one embodiment, the jack support device for detecting effective prestress under bridge anchors further includes multiple first fixing structures 14. Each first fixing structure 14 is detachably connected to the main support structure 1 and is used to fix the main support structure 1 to the anchor 3. In this embodiment, the first cavity 11 is cylindrical, with a diameter larger than that of the anchor 3, to ensure applicability to various anchor 3 diameters. When the diameter of the first cavity 11 is significantly larger than that of the anchor 3, the multiple first fixing structures 14 ensure a secure connection between the main support structure 1 and the anchor 3.

[0027] Please see Figure 2 In one embodiment, a plurality of first threaded holes 15 are circumferentially arranged on the peripheral wall at the bottom of the support structure body 1; the first threaded holes 15 are arranged laterally and penetrate through the peripheral wall at the bottom of the support structure body 1; the first fixing structure 14 is screwed to the first threaded holes 15. Specifically, the first threaded holes 15 connect the first cavity 11 and the outer side of the support structure body 1. After the support structure body 1 is fitted onto the anchor 3, the inner end of the first fixing structure 14 is tightened to abut against the anchor 3, thereby fixing the support structure body 1 to the anchor 3.

[0028] Please see Figure 2In one embodiment, the first fixing structure 14 includes a screw portion 141 and a handle portion 142 fixedly connected to one end of the screw portion 141. By providing the handle portion 142, a force application point can be provided when rotating the screw portion 141, making it easier to operate.

[0029] Please see Figure 2 In one embodiment, the first threaded hole 15 includes at least three, and the plurality of first threaded holes 15 are circumferentially equidistant. When three or more first threaded holes 15 are matched with three or more first fixing structures 14, the support structure body 1 can be fixed from multiple angles to ensure a strong grip.

[0030] Please see Figure 2 In one embodiment, the jack support device for detecting effective prestress under bridge anchors further includes at least one second fixing structure 16; at least one second threaded hole 17 is provided circumferentially on the peripheral wall of the second cavity 12; the second threaded hole 17 penetrates the peripheral wall of the second cavity 12; the second fixing structure 16 is screwed to the second threaded hole 17 and passes through the second threaded hole 17 to abut against the support block 2. Specifically, the second fixing structure 16 can adopt the same structure as the first fixing structure 14. After the support block 2 is placed into the second cavity 12, tightening the second fixing structure 16 to abut against the support block 2 can increase the friction between the support block 2 and the peripheral wall of the second cavity 12 and the second fixing structure 16, thereby fixing the support block 2.

[0031] Please see Figure 3 In one embodiment, the through hole 21 is a cross-shaped hole. In this embodiment, the cross-shaped through hole 21 is suitable for various situations such as one strand of steel wire 5, four strands of steel wire 5, or five strands of steel wire 5, eliminating the need for frequent replacement of support blocks 2 of different specifications. Specifically, one of the five strands of steel wire 5 passes through the center of the cross-shaped hole, while the other four pass through the four ends of the cross-shaped hole respectively.

[0032] Please see Figure 1 In one embodiment, the four through holes 21 are equidistantly arranged circumferentially around the axis of the main support structure 1. The support block 2 in this embodiment corresponds to the more common structure of four stranded steel wires 5. Depending on the actual situation, the support block 2 can have one, three, five, or more through holes 21. When used for on-site testing, one main support structure 1 and multiple support blocks 2 of different specifications can be used together to accommodate different types of testing situations. Specifically, the support block 2 has a small thickness and volume, thus effectively solving the problem of inconvenience in carrying multiple blocks simultaneously.

[0033] In summary, by setting up a support structure main body 1 and replaceable support blocks 2, this utility model ensures that the pressure of the jack 7 is not applied to the clamping plate 4, while allowing for flexible and quick replacement of different support blocks 2 according to the site conditions. This makes it suitable for different numbers of steel strands 5 and various layouts of steel strands 5 on the object being tested, resulting in better versatility.

[0034] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A jack support device for bridge sub-anchor effective prestress detection, characterized in that, The support structure comprises a support structure body, a first cavity is arranged at the bottom of the support structure body, and the first cavity is used for placing an anchor; a second cavity is arranged above the first cavity; an annular protrusion is arranged between the first cavity and the second cavity; the second cavity is communicated with the first cavity; the support structure further comprises a support block; the support block is arranged in the second cavity and detachably connected with the support structure body; at least one through hole is arranged on the support block; the through hole is communicated with the upper part of the support structure body and the first cavity; the through hole is used for passing through a steel strand.

2. The jack support apparatus for effective pre-stress detection under the bridge anchor according to claim 1, characterized in that, The support structure further comprises a plurality of first fixing structures which are detachably connected with the support structure body and used for fixing the support structure body on the anchor.

3. The jack support apparatus for effective pre-stress detection under the bridge anchor according to claim 2, characterized in that, A plurality of first threaded holes are circumferentially arranged on the peripheral wall of the bottom of the support structure body; the first threaded holes are transversely arranged and penetrate the peripheral wall of the bottom of the support structure body; The first fixing structure is screwed with the first threaded hole.

4. The jack support apparatus for effective pre-stress detection under the bridge anchor according to claim 3, characterized in that, The first fixing structure comprises a screw rod part and a handle part fixedly connected with one end of the screw rod part.

5. The jack support apparatus for effective pre-stress detection under the bridge anchor according to claim 3, characterized in that, The first threaded hole comprises at least three first threaded holes which are circumferentially equidistantly arranged.

6. The jack support apparatus for effective pre-stress detection under the bridge anchor according to claim 1, characterized in that, The support structure further comprises at least one second fixing structure; at least one second threaded hole is circumferentially arranged on the peripheral wall of the second cavity; the second threaded hole penetrates the peripheral wall of the second cavity; the second fixing structure is screwed with the second threaded hole and abuts against the support block through the second threaded hole.

7. The jack support apparatus for effective pre-stress detection under the bridge anchor according to claim 1, characterized in that, The through hole is a cross hole.

8. The jack support apparatus for effective pre-stress detection under the bridge anchor according to claim 1, characterized in that, The through hole comprises four through holes which are circumferentially equidistantly arranged with the axis of the support structure body as the center.

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