Bridge construction hanging basket preloading test equipment

Abstract

The invention relates to the technical field of bridge construction hanging basket preloading test equipment, in particular to bridge construction hanging basket preloading test equipment, and aims to solve the problems of low preloading test efficiency, poor precision, high safety risk and the like in the prior art. The equipment comprises a hanging basket assembly installed on a zero block and a pre-pressing test device arranged above the hanging basket assembly. The pre-pressing test device is composed of an anchoring beam, a sliding rail, a top plate, a frame and a bottom plate, a continuous pre-pressing body is arranged below the bottom plate, and the continuous pre-pressing body comprises a plurality of pre-pressing units which can roll freely and can adapt to the inclination angle and curvature change of a bottom die supporting platform. Each pre-pressing unit is provided with a pressure sensor and a telescopic device so as to achieve uniform and constant pressure application. And a brake unit is arranged, so that the operation safety and the positioning precision are improved. Compared with the prior art, manual position adjustment is not needed, manual intervention is reduced, and potential safety hazards are reduced. Moreover, the modularized design of the whole system is convenient for maintenance and adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction hanging basket pre-compression test equipment, and in particular to a bridge construction hanging basket pre-compression test equipment. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] In modern bridge construction, hanging baskets are used as an important temporary support structure in the cantilever casting construction process of continuous beam bridges and cable-stayed bridges. In order to ensure the safety and reliability of the hanging basket, strict prestressing tests are required before its first use and each time it is moved to a new position. Traditional prestressing test methods mainly include prestressing by stacking, which mainly uses concrete blocks or sandbags to simulate the cantilever construction load. The materials used for prestressing need to be transported to the hanging basket platform by hoisting and other means. Loading and unloading are labor-intensive, and construction workers need to manually adjust the position of materials during hoisting, which poses a safety hazard. In addition, there are two common methods, namely ground fulcrum tensioning prestressing and internal anti-fulcrum top pressure, which mainly include the following two methods:

[0004] Local preload test: A predetermined pressure value is applied to different parts of the basket one by one through a hydraulic jack or other loading device. However, this method is inefficient because the loading device needs to be repositioned frequently and it is difficult to ensure the consistency of loading between various test points.

[0005] Load distribution structure preloading: A special load distribution structure is used to disperse the local load to a larger range in order to simulate the uniform loading under actual working conditions. Although this method can improve the test efficiency to a certain extent, due to the complex load transfer path and uneven distribution, the test results often deviate greatly from the actual response.

[0006] Therefore, it is necessary to develop a bridge construction basket preload test equipment that can not only complete the preload test task efficiently and accurately, but also better simulate the load conditions of the basket during actual construction, and provide reliable data support for bridge construction. Summary of the invention

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a bridge construction basket pre-stressing test equipment, aiming to solve the problems of low efficiency, poor accuracy, high safety risks and inability to simulate real conditions in the prior art.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A bridge construction hanging basket pre-compression test device, comprising a hanging basket assembly mounted on a zero block, the hanging basket assembly comprising a bottom mold support platform hoisted by a sling, and a pre-compression test device anchored and mounted on the zero block is arranged above the bottom mold support platform;

[0010] The preload test device comprises an anchoring beam, the anchoring beam is provided with a slide rail, a top plate is slidably mounted on the slide rail, the top plate is driven by a power mechanism, a frame is provided below the top plate, a rotatable bottom plate is slidably mounted in the frame in the up and down directions through a sliding connection member, a first telescopic device and a second telescopic device fixedly mounted on the top plate are arranged between the top plate and the bottom plate in the frame in the front and back directions, and output ends of the first telescopic device and the second telescopic device are both hingedly connected to the bottom plate;

[0011] A continuous pre-pressing body is installed below the bottom plate, and the continuous pre-pressing body includes a plurality of freely rollable pre-pressing units;

[0012] The preloading unit comprises a cylindrical rolling body, the rolling body is radially provided with a plurality of mounting holes evenly distributed on the arc surface, the mounting holes are each installed with a corresponding pressure sensor and a third telescopic device, and the output end of the third telescopic device is installed with a corresponding spherical body that can extend out of the arc surface;

[0013] The first telescopic device, the second telescopic device, the bottom plate and the pre-pressing unit are associated to achieve the continuous pre-pressing body to adapt to the inclination angle of the bottom mold support platform;

[0014] The pressure sensor is associated with the third telescopic device, so as to enable the pre-pressing unit to adapt itself to the curvature of the upper surface of the bottom mold support platform;

[0015] A brake unit is also installed on the top plate, and the brake unit includes a brake block adapted to the slide rail, and the brake block is installed at the vertical angle of the parallelogram hinge member, and the parallelogram member is installed in the installation box, and the installation box is installed on the top plate;

[0016] The installation box is provided with a sliding hole for cooperating with the extension of the active vertex angle and the change of the parallelogram component. The vertex angles of the parallelogram component at the front and rear ends are respectively a fixed vertex angle and a movable vertex angle. The movable vertex angle is connected to the output end of the fourth telescopic device. The movable vertex angle is slidably installed in the installation box under the drive of the fourth telescopic device to realize the braking action of the active vertex angle.

[0017] Preferably, the driving mechanism includes a rack mounted and fixed on the upper side of the anchoring beam, the rack is matched with a driving gear, the driving gear is mounted on a rotating shaft, the rotating shaft is mounted on a support, the support is mounted and fixed on the upper side of the top plate, and the rotating shaft is also provided with a driving wheel for transmission drive.

[0018] Preferably, the anchor beam is a C-shaped channel steel, and the top plate is equipped with a pulley that cooperates with the inner groove of the C-shaped channel steel; the brake block contacts the upper and lower surfaces of the inner groove of the channel steel under the action of the parallelogram component to cooperate with the brake.

[0019] Preferably, the bottom plate is provided with a first sliding block, and the frame is provided with a first sliding groove adapted to the first sliding block.

[0020] Preferably, the movable top corner is provided with a second sliding block, and a second sliding groove adapted to the second sliding block is provided in the installation box.

[0021] Preferably, mounting shafts are provided at both ends of the rolling body, and the mounting shafts are mounted below the bottom plate through brackets.

[0022] Preferably, the installation shaft is provided with a wire hole along the central axis, and the installation hole is connected to the wire hole by a corresponding connecting hole.

[0023] Preferably, a corresponding limit ring for limiting the position of the third telescopic device is also arranged in the mounting hole, and a corresponding limit cover for limiting the position of the limit ring is arranged above the limit ring. The limit cover is installed in the annular sink, and the limit cover is provided with a matching hole for matching the installation of the corresponding spherical body.

[0024] Preferably, the spherical bodies are arranged in an array; the spherical bodies are threadedly connected to the output ends of the corresponding third telescopic devices.

[0025] Preferably, a pad is provided on the upper side of the bottom mold support platform to cooperate with the rolling pre-pressure of the rolling body.

[0026] The present invention has at least the following beneficial effects:

[0027] The present invention uses a rolling continuous preloading body, so that the device can perform continuous vertical pressure simulation tests on the hanging basket, which can better simulate the load conditions borne by the hanging basket during actual construction, provide more reliable data support for bridge construction, and help ensure the safety and durability of the structure. At the same time, it reduces the need for frequent adjustment of the loading equipment, thereby significantly improving the efficiency of the preloading test.

[0028] In the present invention, the pressure sensor in the pre-pressing unit and the third telescopic device can monitor and adapt to the curvature change of the surface of the bottom mold support platform in real time, ensuring that the pressure applied at each contact point is uniform and constant, thereby improving the accuracy and reliability of the test results.

[0029] The present invention has strong adaptability: the preloading unit can adapt to the inclination angle and the curvature of the upper surface of the bottom mold support platform, so that the device can simulate these different load conditions by adjusting the position and pressure distribution of the preloading unit. In addition, bridges built on complex terrain often have large inclination angles and irregular bottom mold support platforms. The adaptive inclination angle function of the device enables it to adapt to preloading tests in such environments.

[0030] In the present invention, the brake unit is driven by a parallelogram hinge member and a fourth telescopic device, achieving efficient and reliable braking and ensuring stability and safety during the test. Specifically, first, the weight of the preload test equipment can reach more than 100 tons, generating a large inertia during the rolling process. The brake unit can ensure that the equipment is quickly braked when it needs to stop to prevent accidental movement due to inertia; second, the preload test requires the equipment to stay accurately at the predetermined position to ensure the consistency and repeatability of the test points.

[0031] Compared with the traditional preloading, the device of the present invention does not need to adjust the position manually, reduces manual intervention and reduces safety hazards. Moreover, the modular design of the whole system is convenient for maintenance and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall front structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall side structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the internal structure of the rolling body;

[0035] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0036] Figure 5 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0037] Figure 6 for Figure 3 Schematic diagram of the enlarged structure at point C in the middle.

[0038] The reference numerals are as follows:

[0039] 100, block 0; 200, bottom mold support platform; 300, pre-stressing test device; 301, anchoring beam; 302, top plate; 3021, pulley; 303, frame; 3031, first slide groove; 304, first telescopic device; 305, second telescopic device; 306, bottom plate; 3061, sliding connection member; 3062, bracket; 307, pre-stressing unit; 3071, rolling body; 3072, mounting shaft; 3073, wire hole; 3074, mounting hole; 3075, connecting hole; 3076, third Telescopic device; 30761, limit ring; 3077, spherical body; 3078, pressure sensor; 3079, limit cover; 30791, annular sink; 30792, matching hole; 308, power mechanism; 3081, driving gear; 30811, rack; 3082, driving wheel; 3083, support; 309, brake unit; 3091, mounting box; 3092, sliding hole; 3093, parallelogram member; 3094, brake block; 3095, fourth telescopic device; 3096, second slide groove. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0041] Figures 1 to 6 A bridge construction hanging basket pre-stress test equipment is presented, including a hanging basket assembly installed on the zero block 100, the hanging basket assembly includes a bottom mold support platform 200 hoisted by a sling, and a pre-stress test device 300 anchored on the zero block 100 is arranged above the bottom mold support platform 200.

[0042] The structure of the prestressing test device 300 may be as follows: it includes an anchoring beam 301, the anchoring beam 301 is provided with a slide rail, a top plate 302 is slidably installed on the slide rail, the top plate 302 is driven by a power mechanism 308, a frame 303 is arranged below the top plate 302, a rotatable bottom plate 306 is slidably installed in the frame 303 in the up and down directions through a sliding connection member 3061, the specific connection method is that the sliding connection member 3061 slides with the frame 303 and is rotatably connected with the bottom plate 306, and a first telescopic device 304 and a second telescopic device 305 fixedly installed on the top plate 302 are arranged between the top plate 302 and the bottom plate 306 in the frame 303 in the front and back directions, and the output ends of the first telescopic device 304 and the second telescopic device 305 are both hingedly connected to the bottom plate 306; the design of the first telescopic device 304 and the second telescopic device 305 allows the prestressing body to adapt to the inclination angle of the bottom mold support platform 200, so as to ensure that effective prestressing tests can be carried out at different positions.

[0043] A continuous pre-pressing body is installed below the bottom plate 306, and the structure of the continuous pre-pressing body is as follows: it includes a plurality of freely rolling pre-pressing units 307;

[0044] The pre-pressing unit 307 comprises a cylindrical rolling body 3071, and the rolling body 3071 is radially provided with a plurality of mounting holes 3074 evenly distributed on the arc surface, and the mounting holes 3074 are each installed with a corresponding pressure sensor 3078 and a third telescopic device 3076, and the output end of the third telescopic device 3076 is installed with a corresponding spherical body 3077 that can extend out of the arc surface;

[0045] The first telescopic device 304, the second telescopic device 305, the bottom plate 306 and the pre-pressing unit 307 are associated to achieve the continuous pre-pressing body to adapt to the tilt angle of the bottom mold support platform 200;

[0046] The pressure sensor 3078 is associated with the third telescopic device 3076 to enable the pre-pressing unit 307 to adapt itself to the curvature of the upper surface of the bottom mold support platform 200;

[0047] The top plate 302 is also provided with a brake unit 309, the brake unit 309 comprising a brake block 3094 adapted to the slide rail, the brake block 3094 being installed at the vertical action vertex of the parallelogram hinge member, the parallelogram member 3093 being installed in a mounting box 3091, and the mounting box 3091 being installed on the top plate 302;

[0048] The installation box 3091 is provided with a sliding hole 3092 for cooperating with the extension of the effective vertex angle and the change of the parallelogram component 3093. The vertex angles at the front and rear ends of the parallelogram component 3093 are respectively a fixed vertex angle and a movable vertex angle. The movable vertex angle is connected to the output end of the fourth telescopic device 3095. The movable vertex angle is slidably installed in the installation box 3091 under the drive of the fourth telescopic device 3095 to realize the braking action of the effective vertex angle.

[0049] The specific structure of the driving mechanism may be as follows: it includes a rack 30811 installed and fixed on the upper side of the anchoring beam 301, the rack 30811 is matched with a driving gear 3081, the driving gear 3081 is installed on a rotating shaft, the rotating shaft is installed on a support 3083, the support 3083 is installed and fixed on the upper side of the top plate 302, and the rotating shaft is also provided with a driving wheel 3082 for transmission drive.

[0050] The anchoring beam 301 can be a C-shaped channel steel. The channel steel can realize its function in the present application on the basis of easy anchoring (better fit with the mating surface of block 100), that is, it can serve as a hanging beam and a slide rail to provide support and guidance for the preload test device 300, and at the same time, it can also take into account the installation of the rack 30811.

[0051] In order to facilitate the installation and sliding guidance of the top plate 302 and ensure its strength, the top plate 302 is installed in the inner groove of the C-shaped channel steel, and is equipped with slender columnar pulleys 3021 on its upper and lower sides that cooperate with the upper and lower sides of the inner groove of the channel steel.

[0052] Similarly, the brake block 3094 contacts and brakes the upper and lower surfaces of the inner groove of the channel steel under the action of the parallelogram member 3093. The high-performance brake system allows faster speed conversion, making the process from acceleration to deceleration smoother and improving the overall test efficiency.

[0053] The specific structure of the sliding installation of the bottom plate 306 is as follows: the bottom plate 306 is provided with a first sliding block, and the frame 303 is provided with a first sliding groove 3031 which is adapted to the first sliding block.

[0054] The specific structure of the movable vertex sliding installation is as follows: the movable vertex is provided with a second sliding block, and a second sliding groove 3096 adapted to the second sliding block is opened in the installation box 3091.

[0055] The brake block 3094 can be installed in a more specific manner by being mounted on the hinge shaft of the top angle through a shaft sleeve with a pin, and a telescopic rod can be connected between the hinge shafts at the upper and lower working top angles to prevent the hinge shafts from rotating, thereby preventing the brake block 3094 from shaking randomly. Of course, there are many ways to install the brake block 3094, which will not be described in detail here.

[0056] The specific structure and installation method of the pre-pressing unit 307 are as follows:

[0057] The two ends of the rolling body 3071 are provided with mounting shafts 3072 , and the mounting shafts 3072 are mounted below the bottom plate 306 through brackets 3062 .

[0058] The installation shaft 3072 is provided with a wire hole 3073 along the central axis, and the installation holes 3074 are communicated with the wire holes 3073 by opening corresponding connecting holes 3075. The wiring of the pressure sensor 3078 and the corresponding third telescopic device 3076 is connected with the outside world through the wire hole 3073. As for the wiring method at the end of the wire hole 3073, a rotary connector may be used, or a spring wire of sufficient length may be directly used for connection without using a connector. In short, the subsequent connection method may adopt the existing technology, which is very easy to implement and will not be elaborated here.

[0059] The installation method of the pressure sensor 3078 and the third telescopic device 3076 is as follows: a corresponding limit ring 30761 for limiting the third telescopic device 3076 is also arranged in the installation hole 3074, and a corresponding limit cover 3079 for limiting the limit ring 30761 is arranged above the limit ring 30761, and the limit cover 3079 is installed in the annular sink 30791, and the limit cover 3079 is provided with a matching hole 30792 for matching and installing the corresponding spherical body 3077.

[0060] The spherical bodies 3077 are arranged in an array so as to better adapt to the surface curvature of the bottom mold support platform 200 ; for ease of installation, the spherical bodies 3077 are threadedly connected to the output ends of the corresponding third telescopic devices 3076 .

[0061] The first telescopic device 304, the second telescopic device 305 and the third telescopic device 3076 can all be hydraulic cylinders of different specifications. The first telescopic device 304 and the second telescopic device 305 can each include a group (two) of hydraulic cylinders with the same specifications and performance. The fourth telescopic device 3095 can be an electric cylinder or a hydraulic cylinder.

[0062] Since the rolling body 3071 of the continuous prestressing body in the present application is cylindrical and its prestressing surface is an arc surface, multiple prestressing units 307 are used to provide a larger prestressing fitting surface. At the same time, since the prestressing surface is an arc surface, in order to prevent a single rolling body 3071 from causing local damage to the bottom mold support platform 200, a pad for cooperating with the rolling prestressing of the rolling body 3071 is provided on the upper side of the bottom mold support platform 200.

[0063] The bridge construction hanging basket preloading test equipment performs continuous vertical pressure simulation on the hanging basket (bottom mold support platform 200) by setting a rolling continuous preloading body. As the rolling body 3071 of the preloading unit 307 repeatedly rolls back and forth and the pressure is upgraded, a continuous reaction curve of the reaction of each part of the hanging basket (such as stress distribution and deformation) can be obtained. The design realizes adaptive adjustment (adaptive to the inclination angle and curvature of the upper surface of the bottom mold support platform 200), ensuring that uniform and constant pressure is applied to each contact point during the continuous rolling process, improving the accuracy and reliability of the preloading test, and also greatly improving work efficiency and safety.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0065] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0066] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bridge construction hanging basket preload test equipment, comprising a hanging basket assembly mounted on a zero block, the hanging basket assembly comprising a bottom mold support platform hoisted by a sling, a preload test device anchored on the zero block is arranged above the bottom mold support platform; characterized in that: The preload test device comprises an anchoring beam, the anchoring beam is provided with a slide rail, a top plate is slidably mounted on the slide rail, the top plate is driven by a power mechanism, a frame is provided below the top plate, a rotatable bottom plate is slidably mounted in the frame in the up and down directions through a sliding connection member, a first telescopic device and a second telescopic device fixedly mounted on the top plate are arranged between the top plate and the bottom plate in the frame in the front and back directions, and output ends of the first telescopic device and the second telescopic device are both hingedly connected to the bottom plate; A continuous pre-pressing body is installed below the bottom plate, and the continuous pre-pressing body includes a plurality of freely rollable pre-pressing units; The preloading unit comprises a cylindrical rolling body, the rolling body is radially provided with a plurality of mounting holes evenly distributed on the arc surface, the mounting holes are each installed with a corresponding pressure sensor and a third telescopic device, and the output end of the third telescopic device is installed with a corresponding spherical body that can extend out of the arc surface; The first telescopic device, the second telescopic device, the bottom plate and the pre-pressing unit are associated to achieve the continuous pre-pressing body to adapt to the inclination angle of the bottom mold support platform; The pressure sensor is associated with the third telescopic device, so as to enable the pre-pressing unit to adapt itself to the curvature of the upper surface of the bottom mold support platform; A brake unit is also installed on the top plate, and the brake unit includes a brake block adapted to the slide rail, and the brake block is installed at the vertical angle of the parallelogram hinge member, and the parallelogram member is installed in the installation box, and the installation box is installed on the top plate; The installation box is provided with a sliding hole for cooperating with the extension of the active vertex angle and the change of the parallelogram component. The vertex angles of the parallelogram component at the front and rear ends are respectively a fixed vertex angle and a movable vertex angle. The movable vertex angle is connected to the output end of the fourth telescopic device. The movable vertex angle is slidably installed in the installation box under the drive of the fourth telescopic device to realize the braking action of the active vertex angle.

2. The bridge construction hanging basket preloading test equipment according to claim 1, characterized in that: The driving mechanism includes a rack installed and fixed on the upper side of the anchoring beam, the rack is matched with a driving gear, the driving gear is installed on a rotating shaft, the rotating shaft is installed on a support, the support is installed and fixed on the upper side of the top plate, and the rotating shaft is also provided with a driving wheel for transmission drive.

3. The bridge construction hanging basket preloading test equipment according to claim 1, characterized in that: The anchor beam is a C-shaped channel steel, and the top plate is equipped with a pulley that matches the inner groove of the C-shaped channel steel; the brake block contacts the upper and lower surfaces of the inner groove of the channel steel under the action of the parallelogram component to cooperate with the brake.

4. The bridge construction hanging basket preloading test equipment according to claim 1, characterized in that: The bottom plate is provided with a first sliding block, and the frame is provided with a first sliding groove which is adapted to the first sliding block.

5. The bridge construction hanging basket preloading test equipment as claimed in claim 4, characterized in that: The movable top corner is provided with a second sliding block, and the installation box is provided with a second sliding groove adapted to the second sliding block.

6. The bridge construction hanging basket preloading test equipment according to claim 1, characterized in that: Both ends of the rolling body are provided with mounting shafts, and the mounting shafts are mounted below the bottom plate through brackets.

7. The bridge construction hanging basket preloading test equipment according to claim 6, characterized in that: The installation shaft is provided with a wire hole along the central axis, and the installation hole is communicated with the wire hole through corresponding connecting holes.

8. The bridge construction hanging basket preloading test equipment according to claim 6, characterized in that: A corresponding limit ring for limiting the position of the third telescopic device is also arranged in the mounting hole, and a corresponding limit cover for limiting the position of the limit ring is arranged above the limit ring. The limit cover is installed in the annular sink, and the limit cover is provided with a matching hole for matching and installing the corresponding spherical body.

9. The bridge construction hanging basket preloading test equipment according to claim 1, characterized in that: The spherical bodies are arranged in an array; the spherical bodies are threadedly connected to the output ends of the corresponding third telescopic devices.

10. The bridge construction hanging basket preloading test equipment according to any one of claims 1 to 9, characterized in that: A pad for cooperating with the rolling pre-pressure of the rolling body is arranged on the upper side of the bottom mold support platform.

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