A preloading test device for a bridge construction hanging basket

Abstract

The present invention relates to the technical field of preloading test equipment for bridge construction hanging baskets, and specifically relates to a preloading test device for bridge construction hanging baskets, aiming to solve the problems of low preloading test efficiency, poor accuracy, and high safety risks in the prior art. The device includes a hanging basket assembly installed on the zero block and a preloading test device arranged above. The preloading test device is composed of an anchoring beam, a slide rail, a top plate, a frame, and a bottom plate. Among them, a continuous preloading body is provided below the bottom plate, which includes a plurality of preloading units that can freely roll and adapt to the inclination angle and curvature changes of the bottom formwork support platform. Each preloading unit is equipped with a pressure sensor and a telescopic device to achieve uniform and constant pressure application. And a braking unit is set to improve the safety and positioning accuracy of the operation. Compared with the traditional technology, the present invention does not require manual position adjustment, reduces manual intervention, and reduces potential safety hazards. Moreover, the modular design of the entire system facilitates maintenance and adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of preloading test equipment for bridge construction hanging baskets, and particularly relates to a preloading test device for bridge construction hanging baskets. Background Art

[0002] The information disclosed in the background art of the present invention is only intended to increase the understanding of the overall background of the present invention, and is not necessarily regarded as an admission or an indication in any form that this information constitutes the prior art already known to those of ordinary skill in the art.

[0003] In modern bridge construction, as an important temporary support structure, hanging baskets are widely used in the cantilever casting construction process of continuous beam bridges and cable-stayed bridges. To ensure the safety and reliability of the hanging basket, strict preloading tests are required before its first use and after each move to a new position. Traditional preloading test methods mainly include load preloading, which mainly uses concrete blocks or sandbags to stack load to equivalently simulate the cantilever construction load. The materials used for preloading need to be transported to the hanging basket platform by hoisting and other means. The labor intensity of loading and unloading is large, and during hoisting, construction workers need to manually adjust the position of the materials, which poses a safety hazard. In addition, there are two common methods: ground fulcrum tension preloading and internal anti-fulcrum jacking preloading, mainly including the following two methods:

[0004] Local preloading test: Apply a predetermined pressure value to different parts of the hanging basket one by one through a hydraulic jack or other loading equipment. However, this method is inefficient because the loading equipment needs to be frequently repositioned, and it is difficult to ensure the loading consistency between each test point.

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

[0006] Therefore, it is necessary to develop a preloading test device for bridge construction hanging baskets, which can not only complete the preloading test task efficiently and accurately, but also better simulate the load conditions of the hanging basket during actual construction, providing reliable data support for bridge construction. Summary of the Invention

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a preloading test device for bridge construction hanging baskets, aiming to solve the problems of low efficiency, poor accuracy, high safety risk, and inability to simulate real conditions in the prior art for hanging basket preloading test equipment.

[0008] To achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A preloading test device for a bridge construction hanging basket, comprising a hanging basket assembly installed on the zero block. The hanging basket assembly includes a bottom formwork support platform hoisted by a sling, and a preloading test device anchored and installed on the zero block is arranged above the bottom formwork support platform;

[0010] The preloading test device includes an anchor beam. The anchor beam is provided with a slide rail, and a top plate is slidably installed on the slide rail. The top plate is driven by a power mechanism. A frame is arranged below the top plate. A rotatable bottom plate is slidably installed in the frame in the up-and-down direction through a sliding connection member. Between the top plate and the bottom plate in the frame, a first telescopic device and a second telescopic device fixedly installed on the top plate are arranged in the front-back direction. The output ends of the first telescopic device and the second telescopic device are both hinged to the bottom plate;

[0011] A continuous preloading main body is installed below the bottom plate. The continuous preloading main body includes a plurality of preloading units that can freely roll;

[0012] The preloading unit includes a cylindrical rolling body. A plurality of mounting holes evenly distributed on the arc surface are radially opened in the rolling body. Corresponding pressure sensors and third telescopic devices are installed in the mounting holes. The output end of the third telescopic device is provided with a corresponding spherical body that can protrude from the arc surface;

[0013] The first telescopic device, the second telescopic device, the bottom plate and the preloading unit are associated to enable the continuous preloading main body to adapt to the inclination angle of the bottom formwork support platform;

[0014] The pressure sensor and the third telescopic device are associated to enable the preloading unit to adapt to the curvature of the upper surface of the bottom formwork support platform;

[0015] A brake unit is further installed on the top plate. The brake unit includes a brake block adapted to the slide rail. The brake block is installed at the acting top angle in the up-and-down direction of a parallelogram hinge member. The parallelogram hinge member is installed in an 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 protrusion of the acting top angle and the change of the parallelogram hinge member. The top angles at the front and rear ends of the parallelogram hinge member are respectively a fixed top angle and a movable top angle. The movable top angle is connected to the output end of a fourth telescopic device. The movable top angle is slidably installed in the installation box under the drive of the fourth telescopic device to realize the braking action of the acting top angle.

[0017] Preferably, the driving mechanism includes a rack fixedly installed on the upper side of the anchoring beam. The rack is engaged with a driving gear which is installed on a rotating shaft. The rotating shaft is installed on a support, and the support is fixedly installed on the upper side of the top plate. A driving wheel for transmission driving is further arranged on the rotating shaft.

[0018] Preferably, the anchoring beam is a C-shaped channel steel, and the top plate is provided with pulleys fitted in the inner groove of the C-shaped channel steel; the brake blocks are in contact with and cooperate for braking with the upper and lower surfaces of the inner groove of the channel steel under the action of the parallelogram hinge member.

[0019] Preferably, the bottom plate is provided with a first slider, and the frame is provided with a first chute adapted to the first slider.

[0020] Preferably, the movable vertex angle is provided with a second slider, and a second chute adapted to the second slider is provided in the installation box.

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

[0022] Preferably, the mounting shafts are provided with wire holes along the central axis, and the mounting holes are all communicated with the wire holes through corresponding communication holes.

[0023] Preferably, corresponding limiting rings for limiting the third telescopic device are further arranged in the mounting holes. Corresponding limiting covers for limiting the limiting rings are arranged above the limiting rings. The limiting covers are installed in the annular sinking platforms, and the limiting covers are provided with fitting holes for fitting and installing the corresponding spherical bodies.

[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 backing plate for cooperating with the rolling preloading of the rolling body is arranged on the upper side of the bottom die support platform.

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

[0027] By using a continuous preloading body that can roll, the device of the present invention can conduct continuous vertical pressure simulation tests on the hanging basket, can better simulate the load conditions borne by the hanging basket during actual construction, provides more reliable data support for bridge construction, and helps to ensure the safety and durability of the structure. At the same time, the need for frequent adjustment of the loading equipment is reduced, thus significantly improving the efficiency of the preloading test.

[0028] In the present invention, the pressure sensor and the third telescopic device in the preloading unit can monitor in real time and adapt to the curvature change of the surface of the bottom die support platform, ensuring that the pressure applied at each contact point is uniform and constant, and 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 of the bottom die support platform and the curvature of the upper surface, enabling the device to simulate these different load conditions by adjusting the position and pressure distribution of the preloading unit. In addition, bridges constructed in complex terrains often have large inclination angles and irregular bottom die support platforms. The self-adaptive inclination angle function of this device enables it to adapt to the preloading tests in such environments.

[0030] In the present invention, the braking unit is driven by a parallelogram hinge member and a fourth telescopic device, achieving efficient and reliable braking and ensuring the stability and safety during the test process. Specifically: First, the weight of the preloading test equipment can reach more than 100 tons, generating a large inertia during the rolling process. The braking unit can ensure that the equipment brakes quickly when needed, preventing accidental movement caused by inertia; Second, the preloading test requires the equipment to accurately stop at a predetermined position to ensure the consistency and repeatability of the test points.

[0031] Compared with the traditional surcharge preloading, this device does not require manual position adjustment, reducing manual intervention and potential safety hazards. Moreover, the modular design of the entire system facilitates maintenance and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic front view of the whole of the present invention;

[0033] Figure 2 is a schematic side view of the whole of the present invention;

[0034] Figure 3 is a schematic internal structure view of the rolling main body;

[0035] Figure 4 is Figure 1 an enlarged schematic structure view of part A in

[0036] Figure 5 is Figure 2 an enlarged schematic structure view of part B in

[0037] Figure 6 is Figure 3 an enlarged schematic structure view of part C in

[0038] The reference numerals are as follows:

[0039] 100, Zero Block; 200, Bottom Formwork Support Platform; 300, Preloading Test Device; 301, Anchoring Beam; 302, Top Plate; 3021, Pulley; 303, Frame; 3031, First Chute; 304, First Telescopic Device; 305, Second Telescopic Device; 306, Bottom Plate; 3061, Sliding Connection Member; 3062, Bracket; 307, Preloading Unit; 3071, Rolling Body; 3072, Mounting Shaft; 3073, Wire Hole; 3074, Mounting Hole; 3075, Connecting Hole; 3076, Third Telescopic Device; 30761, Limiting Ring; 3077, Spherical Body; 3078, Pressure Sensor; 3079, Limiting Cover; 30791, Annular Sunk Platform; 30792, Fitting Hole; 308, Power Mechanism; 3081, Driving Gear; 30811, Rack; 3082, Driving Wheel; 3083, Support; 309, Brake Unit; 3091, Installation Box; 3092, Slide Hole; 3093, Parallelogram Hinge Member; 3094, Brake Block; 3095, Fourth Telescopic Device; 3096, Second Chute. Detailed Embodiment

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

[0041] Figures 1 to 6 There is shown a preloading test device for a bridge construction hanging basket, including a hanging basket assembly installed on the zero block 100. The hanging basket assembly includes a bottom formwork support platform 200 hoisted by a sling, and a preloading test device 300 is anchored and installed above the bottom formwork support platform 200 on the zero block 100.

[0042] The structure of the preloading test device 300 can be as follows: It includes an anchoring beam 301. The anchoring beam 301 is provided with a slide rail, and 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 direction through a sliding connection member 3061. The specific connection method is that the sliding connection member 3061 is slidably matched with the frame 303 and rotatably connected to the bottom plate 306. 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. 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 preloading body to adapt to the inclination angle of the bottom formwork support platform 200, ensuring effective preloading tests can be carried out at different positions.

[0043] A continuous preloading body is installed below the bottom plate 306. The structure of the continuous preloading body is as follows: it includes a plurality of freely rolling preloading units 307;

[0044] The preloading unit 307 includes a cylindrical rolling body 3071. A number of mounting holes 3074 evenly distributed on the arc surface are radially formed in the rolling body 3071. Corresponding pressure sensors 3078 and third telescopic devices 3076 are installed in the mounting holes 3074. A spherical body 3077 that can extend out of the arc surface is installed at the output end of the third telescopic device 3076;

[0045] The first telescopic device 304, the second telescopic device 305, the bottom plate 306 and the preloading unit 307 are associated to enable the continuous preloading body to adapt to the inclination angle of the bottom die support platform 200;

[0046] The pressure sensor 3078 and the third telescopic device 3076 are associated to enable the preloading unit 307 to adapt to the curvature of the upper surface of the bottom die support platform 200;

[0047] A brake unit 309 is also installed on the top plate 302. The brake unit 309 includes a brake block 3094 adapted to the slide rail. The brake block 3094 is installed at the acting vertex angle in the up and down direction of a parallelogram hinge member 3093. The parallelogram hinge member 3093 is installed in an installation box 3091. The installation box 3091 is 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 acting vertex angle and the change of the parallelogram hinge member 3093. The vertex angles at the front and rear ends of the parallelogram hinge member 3093 are respectively a fixed vertex angle and a movable vertex angle. The movable vertex angle is connected to the output end of a fourth telescopic device 3095. The movable vertex angle slides and installs in the installation box 3091 under the drive of the fourth telescopic device 3095 to realize the braking action of the acting vertex angle.

[0049] The specific structure of the driving mechanism can be as follows: it includes a rack 30811 installed and fixed on the upper side of the anchoring beam 301. The rack 30811 cooperates 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. A driving wheel 3082 for transmission drive is also arranged on the rotating shaft.

[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 the zero 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 hinge 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 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 methods of the pressure sensor 3078 and the third telescopic device 3076 are as follows: A corresponding limiting ring 30761 for limiting the third telescopic device 3076 is further provided in the installation hole 3074. Corresponding limiting covers 3079 for limiting the limiting ring 30761 are provided above the limiting ring 30761. The limiting covers 3079 are installed in the annular sunk platforms 30791, and the limiting covers 3079 are provided with fitting holes 30792 for fitting and installing the corresponding spherical bodies 3077.

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

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

[0062] Since the rolling body 3071 of the continuous preloading main body in this application is cylindrical and its preloading surface is an arc surface, multiple preloading units 307 are adopted to provide a larger preloading mating surface. At the same time, since the preloading surface is an arc surface, in order to prevent the single rolling body 3071 from causing local damage to the bottom formwork support platform 200, a backing plate for cooperating with the rolling preloading of the rolling body 3071 is provided on the upper side of the bottom formwork support platform 200.

[0063] This preloading test equipment for bridge construction hanging baskets conducts continuous vertical pressure simulation on the hanging basket (bottom formwork support platform 200) by setting a continuous preloading main body that can roll. With the rolling body 3071 of the preloading unit 307 rolling back and forth repeatedly during the test and accompanied by pressure escalation, continuous response curves of the responses (such as stress distribution and deformation amount) of each part of the hanging basket can be obtained. This design realizes adaptive adjustment (adapting to the inclination angle and the curvature of the upper surface of the bottom formwork support platform 200), ensures that uniform and constant pressure is applied at each contact point during continuous rolling, improves the accuracy and reliability of the preloading test, and also greatly improves the work efficiency and safety.

[0064] In this specification, each embodiment is described in a progressive manner. The key points of each embodiment are all the differences from other embodiments. For the same and similar parts among the embodiments, reference can be made to each other.

[0065] The terms "upper", "lower", "outer side", "inner side", etc. in the description and claims of the present invention and the above-mentioned drawings, if any, are used to distinguish the relative relationship in position and do not have to be given a qualitative definition. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can 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 action vertex of the parallelogram hinge member, and the parallelogram hinge member is installed in a mounting box, and the mounting 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 hinge component. The vertex angles of the parallelogram hinge 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 hinge 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 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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