A preloading test system for a hanging basket in cantilever construction of a bridge

Abstract

The present invention provides a preloading test system for a hanging basket in cantilever construction of a bridge, which relates to the technical field of cantilever construction of bridges. The system includes a hanging basket body arranged on a cantilever body. A bottom formwork platform is arranged at the bottom of the hanging basket body. A bearing platform is arranged above the cantilever body. A number of first walking wheels are symmetrically arranged on the left and right sides of the lower surface of the bearing platform. The bottom of the first walking wheels is in contact with the upper surface of the cantilever body. The front end of the bearing platform extends to the front of the cantilever body and is provided with a connecting column. An installation platform is arranged at the lower end of the connecting column. A number of jacks are arranged at equal intervals on the lower surface of the installation platform. A platform pressing plate is arranged at one end of the jack close to the bottom formwork platform. In the present invention, the platform pressing plate at the output end of the jack can directly press the upper surface of the bottom formwork platform, without the need to embed fine-threaded steel bars in the concrete pile cap, saving construction costs. Moreover, the bearing platform can move above the cantilever body, facilitating the adjustment of the position of the platform pressing plate to align the platform pressing plate with the bottom formwork platform, improving the convenience of the preloading test.

Description

Technical Field

[0001] The invention relates to the technical field of bridge cantilever construction, and in particular to a bridge cantilever construction hanging basket preloading test system. Background Art

[0002] The cantilever construction method refers to setting up working platforms on both sides of the bridge piers, and cantilevering or assembling beam sections in a balanced manner towards the middle of the span until the bridge span structure is closed. It can be divided into two categories: cantilever casting and cantilever assembly. Among them, the main equipment of the cantilever casting method is a pair of walking hanging baskets. The hanging baskets move on the beam sections that have been tensioned and anchored and connected to the pier body as a whole. The steel bars are tied, the formwork is erected, the concrete is poured, and the prestressing is applied. After the hanging basket is assembled, it is necessary to conduct a pre-stress test on the hanging basket to verify the reliability of the hanging basket and fully eliminate the inelastic deformation caused by the hanging basket.

[0003] The application with authorization announcement number CN208039076U discloses a prestressing system for cantilever construction of a bridge hanging basket, which is characterized in that it includes a hanging basket large beam, fine-rolled threaded steel, a large beam pedestal, an upper load-bearing bracket, a lower load-bearing bracket, a steel strand bundle and a through-type tensioning jack; a transverse hanging basket large beam and a hanging basket shear structure are fixedly installed at the outer end position of the top of each group of rigid frame construction hanging baskets; a large beam pedestal is fixedly installed directly below the cantilever of each group of rigid frame construction hanging baskets, an upper load-bearing bracket is fixedly installed on the upper surface of the large beam pedestal, and a through-type tensioning jack is fixedly installed on the upper load-bearing bracket; the lower load-bearing bracket is fixedly installed on the fine-rolled threaded steel embedded in the concrete pedestal directly below the through-type tensioning jack, and the two ends of the steel strand bundle are stretched and tensioned between the lower load-bearing bracket and the through-type tensioning jack through anchors. The preloading system of the present application has the advantages of simple structure, easy and convenient assembly, and easy and quick disassembly.

[0004] However, the above-mentioned prestressing system requires pre-embedded fine-rolled threaded steel bars in the concrete cap, which increases the construction cost on the one hand, and on the other hand, if the pre-embedded position of the fine-rolled threaded steel bars deviates, it is difficult to adjust the position of the prestressing system, making the prestressing test operation inconvenient. Summary of the invention

[0005] The invention provides a bridge cantilever construction hanging basket preloading test system, which is used to solve at least one technical problem proposed in the background technology.

[0006] In order to solve the above technical problems, the present invention discloses a bridge cantilever construction hanging basket prestressing test system, comprising: a hanging basket body arranged on the cantilever body, a bottom mold platform is arranged at the bottom of the hanging basket body, a bearing platform is arranged above the cantilever body, a plurality of first running wheels are symmetrically arranged on the left and right sides of the lower surface of the bearing platform, the bottom of the first running wheel is in contact with the upper surface of the cantilever body, the front end of the bearing platform extends to the front of the cantilever body and is provided with a connecting column, the lower end of the connecting column is provided with an installation platform, a plurality of jacks are arranged at equal intervals on the lower surface of the installation platform, and a platform pressure plate is arranged near one end of the jack near the bottom mold platform.

[0007] Preferably, a counterweight block is arranged at a rear position on the upper surface of the bearing platform.

[0008] Preferably, the carrying platform is in the shape of an elongated strip, and a plurality of first running wheels are arranged at equal intervals along the length direction of the carrying platform.

[0009] Preferably, a limiting beam is horizontally arranged above the bearing platform, and side limiting plates are symmetrically arranged at the left and right ends of the limiting beam. The left and right side walls of the bearing platform are respectively slidably connected to the inner sides of the side limiting plates, and the side limiting plates are located in front of the cantilever body. A clamping plate is arranged at the lower end of the side limiting plate, and the clamping plate extends into the box-shaped cavity near one end of the cantilever body. The box-shaped cavity is arranged on the front side wall of the cantilever body, and a cross bar is arranged at the rear end of the side limiting plate. The cross bar is perpendicular to the side limiting plate, and a plurality of second running wheels are arranged on the lower surface of the cross bar, a first hydraulic cylinder is arranged between the two second running wheels, and a top surface pressure plate is arranged at the lower end of the first hydraulic cylinder.

[0010] Preferably, a reinforcing plate is arranged between the side limiting plate and the clamping plate, one side of the reinforcing plate is connected to the rear side wall of the side limiting plate, and the other side of the reinforcing plate is connected to the upper surface of the clamping plate.

[0011] Preferably, a limiting assembly is arranged on the limiting beam, and the limiting assembly includes a limiting groove, which is arranged at the center position of the lower surface of the limiting beam, a limiting block is arranged in the limiting groove for sliding up and down, a threaded hole is arranged in the center of the limiting beam, a threaded rod is arranged at the upper end of the limiting block, one end of the threaded rod is rotatably connected to the upper surface of the limiting block, and the other end of the threaded rod extends through the threaded hole to above the limiting beam, an external thread is arranged on the outer wall of the threaded rod, and the threaded rod is threadedly connected to the inner wall of the threaded hole of the limiting beam.

[0012] Preferably, a rotating disk is provided at the upper end of the threaded rod, and the lower surface of the rotating disk is fixedly connected to the upper end of the threaded rod.

[0013] Preferably, an installation groove is provided at the bottom of the limit block, a mounting plate is provided in the installation groove, the side wall of the mounting plate is slidably connected to the inner wall of the installation groove up and down, a plurality of rollers are provided on the lower surface of the mounting plate, the threaded rod is provided as a hollow structure, a pushing column is provided in the threaded rod, the pushing column is slidably connected to the inner wall of the threaded rod up and down, the upper end of the pushing column passes through the rotating disk and is connected to the output end of the second hydraulic cylinder, the second hydraulic cylinder is provided on the rotating disk, the upper end of the pushing column is slidably connected to the rotating disk through-position up and down, the lower end of the pushing column passes through the limit block and is rotatably connected to the upper surface of the mounting plate, and the lower end of the pushing column is slidably connected to the limit block through-position up and down.

[0014] Preferably, a first sliding hole is vertically arranged in the card plate, a trigger rod is slidably arranged in the first sliding hole, the bottom of the trigger rod is hemispherical, a fixing plate is horizontally arranged at the bottom of the card plate, a second sliding hole is arranged in the fixing plate, the first sliding hole is connected with the second sliding hole through a connecting hole, the lower end of the trigger rod extends into the second sliding hole and a first connecting spring is arranged, one end of the first connecting spring is connected to the bottom of the trigger rod, and the other end of the first connecting spring is connected to the bottom wall of the second sliding hole, a push rod is slidably arranged in the sliding hole, one end of the push rod close to the trigger rod is hemispherical, one end of the push rod close to the trigger rod contacts the outer wall of the trigger rod, the end of the push rod away from the trigger rod extends to the outside of the second sliding hole and a contact block is arranged, the outer wall of the push rod is sleeved with a second connecting spring, one end of the second connecting spring is connected to the contact block, and the other end of the second connecting spring is connected to the side wall of the fixing plate.

[0015] Preferably, the contact block is made of anti-slip material, and anti-slip grooves are arranged on a side of the contact block close to the box-shaped cavity.

[0016] The technical solution of the present invention has the following advantages: the present invention provides a pre-stressing test system for a hanging basket for bridge cantilever construction, which relates to the technical field of bridge cantilever construction, and comprises a hanging basket body arranged on a cantilever body, a bottom mold platform arranged at the bottom of the hanging basket body, a bearing platform arranged above the cantilever body, a plurality of first running wheels symmetrically arranged on the left and right sides of the lower surface of the bearing platform, the bottom of the first running wheel contacts the upper surface of the cantilever body, the front end of the bearing platform extends to the front of the cantilever body and is provided with a connecting column, a mounting platform is arranged at the lower end of the connecting column, a plurality of jacks are arranged at equal intervals on the lower surface of the mounting platform, and a platform pressure plate is arranged near one end of the jack near the bottom mold platform. In the present invention, the platform pressure plate at the output end of the jack can directly apply pressure to the upper surface of the bottom mold platform, and there is no need to pre-embed fine-rolled threaded steel in the concrete cap, which saves construction costs, and the bearing platform can move above the cantilever body, which is convenient for adjusting the position of the platform pressure plate, so that the platform pressure plate is aligned with the bottom mold platform, which improves the convenience and accuracy of the pre-stressing test.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the drawings of the description.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a preloading test system for a bridge cantilever construction hanging basket according to the present invention;

[0021] Figure 2 It is a side view of the local structure of a preloading test system for a bridge cantilever construction hanging basket of the present invention;

[0022] Figure 3 For the present invention Figure 1 A magnified view of the structure at center;

[0023] Figure 4 It is a schematic diagram of the internal structure of the limit assembly in the present invention;

[0024] Figure 5 For the present invention Figure 1 A magnified view of the structure at B in the middle;

[0025] Figure 6 It is a schematic diagram of the internal structure of the clamping plate and the fixing plate in the present invention.

[0026] In the figure: 1, cantilever body; 101, box-shaped cavity; 2, hanging basket body; 3, bottom mold platform; 4, bearing platform; 5, first walking wheel; 6, connecting column; 7, mounting platform; 8, jack; 9, platform pressure plate; 10, counterweight block; 11, limiting beam; 12, side limiting plate; 13, clamping plate; 14, cross bar; 15, second walking wheel; 16, first hydraulic cylinder; 17, top pressure plate; 18, reinforcing plate; 19, limiting groove; 20, limiting block; 21, threaded rod; 22, rotating disk; 23, mounting plate; 24, roller; 25, pushing column; 26, second hydraulic cylinder; 27, fixing plate; 28, first connecting spring; 29, push rod; 30, second connecting spring; 31, contact block; 32, trigger rod. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Example 1

[0030] The embodiment of the present invention provides a bridge cantilever construction hanging basket preloading test system, such as Figure 1-Figure 6 As shown, it includes: a hanging basket body 2 arranged on a cantilever body 1, a bottom mold platform 3 is arranged at the bottom of the hanging basket body 2, a bearing platform 4 is arranged above the cantilever body 1, a plurality of first running wheels 5 are symmetrically arranged on the left and right sides of the lower surface of the bearing platform 4, the bottom of the first running wheel 5 is in contact with the upper surface of the cantilever body 1, the front end of the bearing platform 4 extends to the front of the cantilever body 1 and is provided with a connecting column 6, a mounting platform 7 is arranged at the lower end of the connecting column 6, a plurality of jacks 8 are arranged at equal intervals on the lower surface of the mounting platform 7, and a platform pressure plate 9 is arranged at one end of the jack 8 close to the bottom mold platform 3.

[0031] The working principle and beneficial effects of the above technical scheme are as follows: the hanging basket body 2 is arranged on the cantilever body 1, and the bottom mold platform 3 is arranged at the lower part of the hanging basket body 2. After the hanging basket is assembled, the load-bearing platform 4 is placed on the cantilever body 1, and the first walking wheel 5 at the bottom of the load-bearing platform 4 contacts the upper surface of the cantilever body 1. A connecting column 6 is arranged at the front end of the load-bearing platform 4. At least two connecting columns 6 are arranged. The lower end of the connecting column 6 is connected to the installation platform 7. A plurality of jacks 8 are arranged on the lower surface of the installation platform 7. A platform pressure plate 9 is arranged at the output end of the jack 8. When the jack 8 is extended, the platform pressure plate 9 can move toward the bottom mold platform 3. After the platform pressure plate 9 contacts the bottom mold platform 3, the platform pressure plate 9 can squeeze the bottom film platform downward, thereby performing a pre-compression test, and the first walking wheel 5 can move along the length direction of the cantilever body 1, thereby adjusting the position of the load-bearing platform 4. In the present invention, the platform pressure plate 9 at the output end of the jack 8 can directly apply pressure to the upper surface of the bottom mold platform 3, and there is no need to pre-embed the fine-rolled threaded steel in the concrete foundation, which saves construction costs. In addition, the bearing platform 4 can move above the cantilever body 1, which is convenient for adjusting the position of the platform pressure plate 9 so that the platform pressure plate 9 is aligned with the bottom mold platform 3, thereby improving the convenience and accuracy of the pre-compression test.

[0032] Example 2

[0033] On the basis of the above-mentioned embodiment 1, Figure 1 As shown, a counterweight 10 is disposed at the rear position of the upper surface of the bearing platform 4 .

[0034] The working principle and beneficial effects of the above technical solution are as follows: a counterweight block 10 is arranged on the upper surface of the bearing platform 4 , and the weight of the bearing platform 4 can be increased by the counterweight block 10 , so that the platform pressing plate 9 can stably extrude the upper surface of the bottom mold platform 3 .

[0035] Example 3

[0036] On the basis of Embodiment 1 or 2, the carrying platform 4 is in an elongated strip shape, and a plurality of first running wheels 5 are arranged at equal intervals along the length direction of the carrying platform 4 .

[0037] The working principle and beneficial effects of the above technical solution are as follows: the load-bearing platform 4 is in the shape of an elongated strip, and the length direction of the load-bearing platform 4 is consistent with the length direction of the cantilever body 1, and a plurality of first running wheels 5 are arranged at equal intervals at the bottom of the load-bearing platform 4, which can increase the load-bearing capacity of the first running wheels 5, and increase the contact area, thereby reducing the pressure on the upper surface of the cantilever body 1 and reducing damage to the first running wheels 5 and the upper surface of the cantilever body 1.

[0038] Example 4

[0039] On the basis of any one of Examples 1-3, Figure 1-Figure 6As shown, a limiting beam 11 is horizontally arranged above the bearing platform 4, and side limiting plates 12 are symmetrically arranged at the left and right ends of the limiting beam 11, and the left and right side walls of the bearing platform 4 are respectively slidably connected with the inner sides of the side limiting plates 12, and the side limiting plates 12 are located in front of the cantilever body 1, and a clamping plate 13 is arranged at the lower end of the side limiting plate 12, and the clamping plate 13 extends into the box-shaped cavity 101 close to one end of the cantilever body 1, and the box-shaped cavity 101 is arranged on the front side wall of the cantilever body 1, and a cross bar 14 is arranged at the rear end of the side limiting plate 12, and the cross bar 14 is perpendicular to the side limiting plate 12, and a plurality of second running wheels 15 are arranged on the lower surface of the cross bar 14, and a first hydraulic cylinder 16 is arranged between the two second running wheels 15, and a top surface pressure plate 17 is arranged at the lower end of the first hydraulic cylinder 16;

[0040] A reinforcing plate 18 is disposed between the side limiting plate 12 and the clamping plate 13 . One side of the reinforcing plate 18 is connected to the rear side wall of the side limiting plate 12 , and the other side of the reinforcing plate 18 is connected to the upper surface of the clamping plate 13 .

[0041] The working principle and beneficial effects of the above technical solution are as follows: when the jack 8 is ejected, as the pressure of the platform pressure plate 9 on the bottom mold platform 3 gradually increases, the first walking wheel 5 will gradually separate from the upper surface of the cantilever body 1, causing a deviation in the preload test result. In order to avoid the above problem, a limiting beam 11 is arranged above the bearing platform 4, and side limiting plates 12 are arranged at both ends of the limiting beam 11. A clamping plate 13 is arranged at the bottom of the side limiting plate 12. The clamping plate 13 is located in a box-shaped cavity 101 reserved on the front side wall of the cantilever body 1. A first hydraulic cylinder 16 is arranged on the lower surface of the cross bar 14 to control the first hydraulic cylinder 16 to extend, so that the top pressure plate 17 contacts with the upper surface of the cantilever body 1, and drives the side limiting plate 12 to move upward through the cross bar 14. The upward movement of the side limiting plate 12 drives the clamping plate 13 in the box-shaped cavity. 101 moves upward until the upper surface of the card plate 13 contacts the inner wall of the upper end of the box-type cavity 101. At this time, the limiting beam 11 can limit the load-bearing platform 4 to prevent the load-bearing platform 4 from moving further upward, ensuring that the platform pressure plate 9 stably applies pressure to the bottom mold platform 3. After the pre-stressing test is completed, the first hydraulic cylinder 16 is controlled to retract, so that the second walking wheel 15 contacts the upper surface of the cantilever body 1, and the card plate 13 is separated from the upper inner wall of the box-type cavity 101. At this time, the cross bar 14 can be pushed to make the card plate 13 move away from the box-type cavity 101, and then the load-bearing platform 4 and the limiting beam 11 are hoisted and removed together. No bolts are required during the disassembly and assembly process, making the disassembly and assembly of the pre-stressing test system more convenient and quick, thereby shortening the required time for the pre-stressing test and improving the construction efficiency.

[0042] Example 5

[0043] On the basis of Example 4, Figure 1-Figure 4As shown, a limiting assembly is arranged on the limiting beam 11, and the limiting assembly includes a limiting groove 19, and the limiting groove 19 is arranged at the center position of the lower surface of the limiting beam 11, and a limiting block 20 is arranged in the limiting groove 19 for sliding up and down, and a threaded hole is arranged in the center of the limiting beam 11, and a threaded rod 21 is arranged on the upper end of the limiting block 20, and one end of the threaded rod 21 is rotatably connected to the upper surface of the limiting block 20, and the other end of the threaded rod 21 extends to the upper part of the limiting beam 11 through the threaded hole, and an external thread is arranged on the outer wall of the threaded rod 21, and the threaded rod 21 is threadedly connected to the inner wall of the threaded hole of the limiting beam 11;

[0044] A rotating disk 22 is disposed at the upper end of the threaded rod 21 , and a lower surface of the rotating disk 22 is fixedly connected to the upper end of the threaded rod 21 .

[0045] The working principle and beneficial effects of the above technical scheme are as follows: in order to further improve the stability of the platform pressure plate 9, a limit assembly is arranged on the limit beam 11. When the platform pressure plate 9 is aligned with the upper surface of the bottom mold platform 3, rotating the rotating disk 22 can drive the threaded rod 21 to rotate. The threaded rod 21 is threadedly connected to the limit beam 11. Therefore, when the threaded rod 21 rotates, it can drive the limit block 20 to move toward the direction close to the bearing platform 4 until the limit block 20 presses the bearing platform 4 onto the cantilever body 1, thereby increasing the pressure on the bearing platform 4, avoiding the upward movement of the bearing platform 4 and affecting the pre-stressing test results, thereby improving the accuracy of the pre-stressing test of the bottom mold platform 3 of the hanging basket, a plurality of latch teeth are arranged on the lower surface of the limit block 20, and a plurality of latch grooves are arranged on the upper surface of the bearing platform 4. The latch teeth are adapted to the latch grooves. When the lower surface of the limit block 20 contacts the upper surface of the bearing platform 4, the latch teeth can be inserted into the latch grooves, thereby preventing the bearing platform 4 from sliding back and forth at will, and further improving the reliability of the bearing platform 4.

[0046] Example 6

[0047] On the basis of Example 5, Figure 1-Figure 4 As shown, a mounting groove is arranged at the bottom of the limit block 20, and a mounting plate 23 is arranged in the mounting groove. The side wall of the mounting plate 23 is slidably connected to the inner wall of the mounting groove up and down, and a plurality of rollers 24 are arranged on the lower surface of the mounting plate 23. The threaded rod 21 is arranged as a hollow structure, and a pushing column 25 is arranged in the threaded rod 21. The pushing column 25 is slidably connected to the inner wall of the threaded rod 21 up and down, and the upper end of the pushing column 25 passes through the rotating disk 22 and is connected to the output end of the second hydraulic cylinder 26. The second hydraulic cylinder 26 is arranged on the rotating disk 22, and the upper end of the pushing column 25 is slidably connected to the rotating disk 22 through-position up and down, and the lower end of the pushing column 25 passes through the limit block 20 and is rotatably connected to the upper surface of the mounting plate 23, and the lower end of the pushing column 25 is slidably connected to the limit block 20 through-position up and down.

[0048] The working principle and beneficial effects of the above technical solution are as follows: before adjusting the position of the load-bearing platform 4, first start the second hydraulic cylinder 26 to extend the second hydraulic cylinder 26, and the output end of the second hydraulic cylinder 26 drives the pushing column 25 to move downward inside the threaded rod 21, and the pushing column 25 pushes the mounting plate 23 to move toward the load-bearing platform 4, so that the roller 24 contacts the upper surface of the load-bearing platform 4. At this time, the front and rear position of the load-bearing platform 4 is adjusted. During the adjustment process, the left and right sides of the load-bearing platform 4 are limited by the side limit plates 12, and the upper surface of the load-bearing platform 4 is limited by the roller 24, which avoids the load-bearing platform 4 from shaking during the adjustment process, ensures the stable horizontal movement of the load-bearing platform 4, and makes the adjustment of the platform pressure plate 9 more precise.

[0049] Example 7

[0050] On the basis of any one of Examples 4-6, Figure 5 , Figure 6 As shown, a first sliding hole is vertically arranged in the card plate 13, a trigger rod 32 is slidably arranged in the first sliding hole, the bottom of the trigger rod 32 is hemispherical, a fixing plate 27 is horizontally arranged at the bottom of the card plate 13, a second sliding hole is arranged in the fixing plate 27, the first sliding hole is connected with the second sliding hole through a connecting hole, the lower end of the trigger rod 32 extends into the second sliding hole and is provided with a first connecting spring 28, one end of the first connecting spring 28 is connected to the bottom of the trigger rod 32, the other end of the first connecting spring 28 is connected to the bottom wall of the second sliding hole, a push rod 29 is slidably arranged in the sliding hole, one end of the push rod 29 close to the trigger rod 32 is hemispherical, one end of the push rod 29 close to the trigger rod 32 contacts the outer wall of the trigger rod 32, one end of the push rod 29 away from the trigger rod 32 extends to the outside of the second sliding hole and is provided with a contact block 31, a second connecting spring 30 is sleeved on the outer wall of the push rod 29, one end of the second connecting spring 30 is connected to the contact block 31, and the other end of the second connecting spring 30 is connected to the side wall of the fixing plate 27;

[0051] The contact block 31 is made of anti-skid material, and anti-skid patterns are arranged on a side of the contact block 31 close to the box-shaped cavity 101 .

[0052] The working principle and beneficial effects of the above technical solution are as follows: when the card plate 13 moves upward driven by the side limit plate 12, the trigger rod 32 in the card plate 13 gradually contacts the top wall of the box-shaped cavity 101. After the contact, the trigger rod 32 slides along the first sliding hole to the inside of the second sliding hole, and the first connecting spring 28 is gradually compressed. When the trigger rod 32 moves downward, the lower end of the trigger rod 32 contacts one end of the ejector rod 29. The trigger rod 32 is perpendicular to the ejector rod 29. The lower ends of the trigger rod 32 and the ejector rod 29 are both set to be hemispherical. 2 drives the push rod 29 to slide in the direction away from the second sliding hole, the second connecting spring 30 is stretched, and the contact block 31 gradually contacts closely with the side wall of the box-shaped cavity 101. At this time, the anti-slip performance of the contact block 31 can make the side limit plate 12 more stable, avoid the side limit plate 12 moving upward to change the position of the bearing platform 4, enhance the reliability of the pre-compression test system, facilitate the platform pressure plate 9 to evenly squeeze the bottom mold platform 3, so that the bottom mold platform 3 at the lower end of the hanging basket body 2 is evenly stressed, and improve the accuracy of the pre-compression test result.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A bridge cantilever construction hanging basket preloading test system, characterized in that: include: A hanging basket body (2) is arranged on a cantilever body (1), a bottom mold platform (3) is arranged at the bottom of the hanging basket body (2), a bearing platform (4) is arranged above the cantilever body (1), a plurality of first running wheels (5) are symmetrically arranged on the left and right sides of the lower surface of the bearing platform (4), the bottom of the first running wheels (5) is in contact with the upper surface of the cantilever body (1), the front end of the bearing platform (4) extends to the front of the cantilever body (1) and is provided with a connecting column (6), the lower end of the connecting column (6) is provided with a mounting platform (7), a plurality of jacks (8) are arranged at equal intervals on the lower surface of the mounting platform (7), and a platform pressure plate (9) is arranged at one end of the jack (8) close to the bottom mold platform (3); A limit beam (11) is horizontally arranged above the bearing platform (4), and side limit plates (12) are symmetrically arranged at the left and right ends of the limit beam (11). The left and right side walls of the bearing platform (4) are respectively slidably connected to the inner sides of the side limit plates (12). The side limit plates (12) are located in front of the cantilever body (1). A clamping plate (13) is arranged at the lower end of the side limit plate (12). The clamping plate (13) extends into the box-shaped cavity (101) near one end of the cantilever body (1). The box-shaped cavity (101) is arranged on the front side wall of the cantilever body (1). A cross bar (14) is arranged at the rear end of the side limit plate (12). The cross bar (14) is perpendicular to the side limit plate (12). A plurality of second running wheels (15) are arranged on the lower surface of the cross bar (14). A first hydraulic cylinder (16) is arranged between the two second running wheels (15). A top surface pressure plate (17) is arranged at the lower end of the first hydraulic cylinder (16).

2. A bridge cantilever construction hanging basket preloading test system according to claim 1, characterized in that: A counterweight block (10) is arranged at a rear position on the upper surface of the bearing platform (4).

3. The preloading test system for a bridge cantilever construction hanging basket according to claim 1 is characterized in that: The bearing platform (4) is in the shape of an elongated strip, and a plurality of first running wheels (5) are arranged at equal intervals along the length direction of the bearing platform (4).

4. A bridge cantilever construction hanging basket preloading test system according to claim 1, characterized in that: A reinforcing plate (18) is provided between the side limiting plate (12) and the clamping plate (13); one side of the reinforcing plate (18) is connected to the rear side wall of the side limiting plate (12), and the other side of the reinforcing plate (18) is connected to the upper surface of the clamping plate (13).

5. The preloading test system for a bridge cantilever construction hanging basket according to claim 1 is characterized in that: A limiting assembly is arranged on the limiting beam (11), the limiting assembly comprising a limiting groove (19), the limiting groove (19) being arranged at the center position of the lower surface of the limiting beam (11), a limiting block (20) being arranged in the limiting groove (19) for sliding up and down, a threaded hole being arranged at the center of the limiting beam (11), a threaded rod (21) being arranged at the upper end of the limiting block (20), one end of the threaded rod (21) being rotatably connected to the upper surface of the limiting block (20), the other end of the threaded rod (21) extending through the threaded hole to the upper side of the limiting beam (11), an outer thread being arranged on the outer wall of the threaded rod (21), and the threaded rod (21) being threadedly connected to the inner wall of the threaded hole of the limiting beam (11).

6. A bridge cantilever construction hanging basket preloading test system according to claim 5, characterized in that: A rotating disk (22) is disposed at the upper end of the threaded rod (21), and a lower surface of the rotating disk (22) is fixedly connected to the upper end of the threaded rod (21).

7. The preloading test system for a bridge cantilever construction hanging basket according to claim 5 is characterized in that: A mounting groove is arranged at the bottom of the limit block (20), a mounting plate (23) is arranged in the mounting groove, a side wall of the mounting plate (23) is slidably connected to the inner wall of the mounting groove, a plurality of rollers (24) are arranged on the lower surface of the mounting plate (23), the threaded rod (21) is arranged as a hollow structure, a pushing column (25) is arranged in the threaded rod (21), the pushing column (25) is slidably connected to the inner wall of the threaded rod (21), the upper end of the pushing column (25) passes through the rotating disk (22) and is connected to the output end of the second hydraulic cylinder (26), the second hydraulic cylinder (26) is arranged on the rotating disk (22), the upper end of the pushing column (25) is slidably connected to the rotating disk (22) at a penetration position, the lower end of the pushing column (25) passes through the limit block (20) and is rotatably connected to the upper surface of the mounting plate (23), and the lower end of the pushing column (25) is slidably connected to the penetration position of the limit block (20).

8. The preloading test system for a bridge cantilever construction hanging basket according to claim 1 is characterized in that: A first sliding hole is vertically arranged in the card plate (13), a trigger rod (32) is slidably arranged in the first sliding hole, the bottom of the trigger rod (32) is hemispherical, a fixing plate (27) is horizontally arranged at the bottom of the card plate (13), a second sliding hole is arranged in the fixing plate (27), the first sliding hole is connected to the second sliding hole through a connecting hole, the lower end of the trigger rod (32) extends into the second sliding hole and a first connecting spring (28) is arranged, one end of the first connecting spring (28) is connected to the bottom of the trigger rod (32), and the other end of the first connecting spring (28) is connected to the second sliding hole. The bottom wall is connected, a push rod (29) is slidably arranged in the sliding hole, the end of the push rod (29) close to the trigger rod (32) is hemispherical, the end of the push rod (29) close to the trigger rod (32) contacts the outer wall of the trigger rod (32), the end of the push rod (29) away from the trigger rod (32) extends to the outside of the second sliding hole and is provided with a contact block (31), the outer wall of the push rod (29) is sleeved with a second connecting spring (30), one end of the second connecting spring (30) is connected to the contact block (31), and the other end of the second connecting spring (30) is connected to the side wall of the fixing plate (27).

9. A bridge cantilever construction hanging basket preloading test system according to claim 8, characterized in that: The contact block (31) is made of an anti-slip material, and an anti-slip pattern is provided on a side of the contact block (31) close to the box-shaped cavity (101).

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