Construction prestressing test device and construction prestressing test method for continuous beam bridge cantilever formwork

Abstract

This invention provides a construction preloading test device and method for a continuous beam bridge formwork. The construction preloading test device includes a traveling mechanism and a jacking mechanism. The traveling mechanism is anchored and cantilevered on the bridge segment and is connected to the jacking mechanism, used to drive the jacking mechanism to move above the bottom plate of the formwork. The jacking mechanism includes a chassis, a telescopic boom, and a top plate. One end of the telescopic boom is connected to the chassis, and the other end is connected to the top plate. The telescopic boom changes the distance between the chassis and the top plate through a telescopic drive component. The chassis contacts the longitudinal distribution beam above the bottom plate of the formwork, allowing the force of the telescopic drive component to be transmitted to the formwork to achieve the preloading test. The construction preloading test method includes conducting a preloading test on the formwork, calculating the displacement of the formwork, and dismantling the construction preloading device of the current connecting beam bridge formwork after completing the construction preloading test of the current continuous beam bridge formwork.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a construction prestressing test device and a construction prestressing test method for a continuous beam bridge formwork. Background Technology

[0002] Cantilever casting is a major construction method for continuous beam bridges, with the formwork being the most critical load-bearing equipment. The formwork platform allows for operations such as rebar tying, prestressing, and concrete pouring. After installation, preloading is required. Preloading verifies the overall stability of the formwork and the operation of the equipment, ensuring the safe operation of the entire system during construction. It also allows for monitoring the formwork's stiffness and other mechanical properties, eliminating the effects of inelastic deformation, and ensuring that the main beam's alignment and elevation meet design and specification requirements.

[0003] Common preloading methods for hanging baskets include surcharge preloading, ground-support tensioning preloading, and internal counter-support jacking. Surcharge preloading primarily uses concrete blocks or sandbags to simulate the cantilever construction load. Materials for preloading need to be transported to the hanging basket platform via hoisting, resulting in high labor intensity during loading and unloading. Furthermore, manual adjustment of material positions during hoisting poses safety hazards. Ground-support tensioning preloading involves embedding anti-tension piles in the ground and connecting the hanging basket base plate to the anti-tension pile bearing mechanism using steel strands. Tensioning the steel strands achieves preloading of the hanging basket. While convenient, this method is only suitable for construction conditions where the hanging basket platform is at a moderate distance from the ground and there are no rivers on the surface. Internal counter-support jacking involves setting embedded parts in the box girder section during bridge casting, using these as reaction fulcrums. Preloading is achieved by jacking between the embedded parts and the hanging basket base plate using jacks. During loading, the concrete around the embedded parts bears significant forces, making it prone to cracking. Therefore, there is an urgent need to develop an intelligent prestressing device that can ensure construction safety and be applicable to various working conditions, in order to solve the problems existing in the prestressing process of the hanging basket construction of continuous beam bridges. Summary of the Invention

[0004] This invention provides a construction preloading test device for a continuous beam bridge formwork, comprising a traveling mechanism and a jacking mechanism. The traveling mechanism is anchored and cantilevered on the bridge segment, and is connected to the jacking mechanism to drive the jacking mechanism to move above the bottom plate of the formwork. The jacking mechanism includes a chassis, a telescopic boom, and a top plate. One end of the telescopic boom is connected to the chassis, and the other end is connected to the top plate. The telescopic boom changes the distance between the chassis and the top plate through the drive of a telescopic drive component. The chassis contacts the longitudinal distribution beam above the bottom plate of the formwork, allowing the force of the telescopic drive component to be transmitted to the formwork to achieve the preloading test of the formwork.

[0005] Optionally, the telescopic boom includes multiple hinged scissor frames connected sequentially along the height direction, wherein the uppermost scissor frame is fixedly connected to the top plate and the lowermost scissor frame is fixedly connected to the chassis; the fixed end and the driving end of the telescopic drive are respectively hinged to any two of the scissor frames.

[0006] Optionally, the scissor frame includes a first square steel, a second square steel, and a connecting shaft. The first square steel and the second square steel are arranged to cross each other, and the middle parts of the first square steel and the second square steel are rotatably connected by the connecting shaft.

[0007] Optionally, the traveling mechanism includes a longitudinal beam, a connecting beam, a connecting assembly, and a longitudinal wheel set; the longitudinal beam has two pieces spaced apart from each other, the two longitudinal beams are anchored and cantilevered on the bridge deck of the bridge segment, and each of the two longitudinal beams has a longitudinally sliding boss arranged opposite to each other; the connecting beam has longitudinal wheel sets at both ends, and slides within the longitudinally sliding bosses through the longitudinal wheel sets; the connecting assembly is disposed on the connecting beam and is used to connect with the jacking mechanism.

[0008] Optionally, the longitudinal beam may be configured as one of a longitudinal beam structure, a C-shaped steel beam structure, or an I-shaped steel beam structure.

[0009] Optionally, the connecting beam may be configured as one of a longitudinal beam structure, a C-shaped steel beam structure, or an I-shaped steel beam structure.

[0010] Optionally, the connecting beam is configured as an I-beam steel beam structure; the connecting assembly includes a first connecting plate, a second connecting plate, a connector, and a transverse pulley assembly; the first connecting plate and the second connecting plate are respectively disposed on both sides of the connecting beam, the first connecting plate and the second connecting plate are connected to each other by the connector, and both the first connecting plate and the second connecting plate are provided with transverse pulley assemblies; the transverse pulley assemblies are in rolling connection with the inner side of the connecting beam.

[0011] Optionally, the first connecting plate and the second connecting plate are configured to be symmetrically arranged, and both the first connecting plate and the second connecting plate include vertical sections and horizontal sections that are connected to each other, and the vertical sections are connected to each other by connectors; two or more sliding grooves are provided on the top plate symmetrically arranged along the telescopic boom, and the horizontal sections of the first connecting plate and the second connecting plate are respectively fitted into the two sliding grooves.

[0012] In addition to the above structure, the construction preloading test device for the continuous beam bridge formwork also includes a load distribution mechanism. The load distribution mechanism is set on the bottom plate of the formwork and is connected to the bottom plate of the formwork in a contact manner to uniformly bear the loading pressure of the jacking mechanism.

[0013] In addition to the above structure, the construction preloading test device for the continuous beam bridge formwork also includes a monitoring mechanism. The monitoring mechanism includes a control box and a pressure sensor and a laser sensor connected to the control box via a signal connection. The pressure sensor is used to monitor the pressure transmitted from the jacking mechanism to the formwork in real time. The laser sensor is used to monitor the displacement of the formwork in real time.

[0014] This invention also provides a method for prestressing test of formwork for continuous beam bridges, comprising the following steps: Step 1: Install the construction preloading test device for the continuous beam bridge hanging basket as described above; Step 2: Pre-compression test of the hanging basket: The traveling mechanism drives the jacking mechanism to move above the longitudinal distribution beam; the telescopic drive drives the telescopic arm to extend, so as to increase the distance between the chassis and the top plate, until the telescopic arm extends above the top plate so that the pressure sensor contacts the connecting beam and the chassis contacts the longitudinal distribution beam, so as to form an internal support between the connecting beam and the longitudinal distribution beam. The telescopic drive uses a graded loading method to continuously apply the jacking force, which can apply a pre-compression load to the hanging basket. Step 3: Calculate the displacement of the hanging basket: During the application of the preload, the laser displacement sensor and pressure sensor monitor the displacement and load of the hanging basket in real time, and transmit the monitored data to the control box in real time. The control box performs data post-processing on the received data to obtain the displacement of the hanging basket. Step 4: Complete the construction prestressing test of the current continuous beam bridge formwork and remove the construction prestressing device of the current continuous beam bridge formwork.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a construction prestressing test device for a continuous beam bridge formwork. By setting a traveling mechanism, the jacking mechanism (prestressing application mechanism) can be accurately moved to the bottom of the formwork to be prestressed, so as to ensure the balance of the prestressing force on the formwork during the prestressing process; by setting a jacking mechanism (prestressing application mechanism) to load the construction prestressing of the formwork, the construction prestressing test of the formwork can be effectively carried out.

[0016] (2) The preloading test device for the construction of a continuous beam bridge formwork provided by the present invention is equipped with a load distribution mechanism. By setting the load distribution mechanism below the jacking mechanism, the load distribution of the telescopic drive component in the jacking mechanism is made more uniform.

[0017] (3) The construction preloading test device for a continuous beam bridge formwork provided by the present invention is equipped with a monitoring mechanism to monitor and analyze the construction load and displacement deformation of the formwork in real time.

[0018] (4) The present invention provides a construction preloading test method for a continuous beam bridge formwork. By using this method to conduct a construction preloading test on the formwork, the displacement of the formwork during construction can be effectively detected, providing a valid reference for subsequent elevation adjustment of the formwork.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a front view schematic diagram of a construction preloading test device for a continuous beam bridge formwork installed on a bridge segment according to an embodiment of the present invention; Figure 2 yes Figure 1 Axonometric diagram showing the interconnection of the traveling mechanism, jacking mechanism, load distribution mechanism, and monitoring mechanism; Figure 3 yes Figure 1 Enlarged view of a portion of point A in the middle; Figure 4 yes Figure 1 Axonometric schematic diagram of the central jacking mechanism; Figure 5 This is a flowchart illustrating a preloading method for the construction of a connecting beam bridge using a formwork system, as described in an embodiment of the present invention.

[0021] in: 1. Hanging basket; 2. Traveling mechanism; 2.1. Longitudinal beam; 2.2. Connecting beam; 2.3. Longitudinal wheel block; 2.4. First connecting plate; 2.5. Second connecting plate; 2.6. Connecting component; 2.7. Transverse pulley block; 3. Pushing mechanism; 3.1. Chassis; 3.2. Telescopic boom; 3.3. Top plate; 3.4. Telescopic drive component; 4. Load distribution mechanism, 4.1. Longitudinal distribution beam, 4.2. Transverse distribution beam; 5. Monitoring mechanism; 5.1 Control box; 5.2 Pressure sensor; 5.3 Laser sensor; 6. Bridge segments. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of the present invention clearer and easier to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of the present invention are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of the present invention; the "several" mentioned in the present invention are not limited to the specific number shown in the examples in the accompanying drawings; the orientations or positional relationships indicated by terms such as "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "center" mentioned in the present invention are all based on the orientations or positional relationships shown in the accompanying drawings of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on the present invention.

[0023] This example: See Figures 1 to 4 As shown, a construction preloading test device for a continuous beam bridge formwork includes a traveling mechanism 2, a jacking mechanism 3, and a load distribution mechanism 4.

[0024] The traveling mechanism 2 includes a longitudinal beam 2.1, a connecting beam 2.2, a connecting assembly, and longitudinal wheel sets 2.3. The longitudinal beam 2.1 is preferably configured as a longitudinal beam structure, a C-shaped steel beam structure, or an I-shaped steel beam structure, and preferably has two longitudinal beams 2.1 spaced apart from each other. The two longitudinal beams 2.1 are anchored and cantilevered on the bridge deck of the bridge segment 6 with their open ends facing each other. The connecting beam 2.2 is preferably configured as a longitudinal beam structure, a C-shaped steel beam structure, or an I-shaped steel beam structure, and both ends of the connecting beam 2.2 are provided with longitudinal wheel sets 2.3, which are connected to the longitudinal beam 2.1 and slide on the longitudinal beam 2.1. The connecting assembly is movably disposed on the connecting beam 2.2 and is used to connect to one end of the jacking mechanism 3 so that the jacking mechanism 3 is moved to the top of the hanging basket 1 under the drive of the traveling mechanism 2. Preferably, the longitudinal beam 2.1 is configured as a longitudinal beam structure, and the connecting beam 2.2 is configured as an I-beam steel beam structure; each longitudinal wheel set has two wheelsets, each wheelset has two wheels, and the two wheels slide on the boss between them.

[0025] Optionally, to enable the connecting beam 2.2 to slide smoothly on the longitudinal beam 2.1, the longitudinal wheel set 2.3 preferably includes a first set of longitudinal wheels disposed on the upper end face of the connecting beam 2.2 and a second set of longitudinal wheels disposed on the lower end face of the connecting beam 2.2. The first set of longitudinal wheels and the second set of longitudinal wheels are preferably configured as directional wheel structures, and their connecting parts (specifically, the connecting frame of the directional wheel structure) are fixedly connected to the connecting beam 2.2, and their rolling parts (specifically, the rollers of the directional wheel structure) are respectively rolledly connected to the upper inner side and lower inner side of the open end of the longitudinal beam 2.1.

[0026] Optionally, to enable adjustment of the displacement of the jacking mechanism 3 on the connecting beam 2.2, the connecting assembly includes a first connecting plate 2.4, a second connecting plate 2.5, a connector 2.6, and a transverse pulley block 2.7. The first connecting plate 2.4 and the second connecting plate 2.5 are respectively disposed on both sides of the connecting beam 2.2, and the first connecting plate 2.4 and the second connecting plate 2.5 are connected to each other through the connector 2.6. A transverse pulley block 2.7 is also connected to both the first connecting plate 2.4 and the second connecting plate 2.5. The relative displacement between the jacking mechanism 3 and the connecting beam 2.2 is achieved by sliding the transverse pulley block 2.7 on the connecting beam 2.2. Preferably, the first connecting plate 2.4 and the second connecting plate 2.5 are symmetrically arranged along the connecting beam 2.2, and each includes a vertical section and a horizontal section that are connected to each other. The vertical ends of the first connecting plate 2.4 and the second connecting plate 2.5 are connected to each other through a connector 2.6. The horizontal sections of the first connecting plate 2.4 and the second connecting plate 2.5 are respectively connected to the jacking mechanism 3. The connector 2.6 is preferably configured as a double-headed bolt structure.

[0027] The jacking mechanism 3 includes a chassis 3.1, a telescopic boom 3.2, and a top plate 3.3. The chassis 3.1 is in contact with a longitudinal distribution beam 4.1 above the bottom plate of the hanging basket 1, and is also connected to one end of the telescopic boom 3.2. The other end of the telescopic boom 3.2 is connected to the top plate 3.3. The top plate 3.3 is also provided with two sliding grooves symmetrically arranged along the telescopic boom 3.2. The horizontal section of the first connecting plate 2.4 and the horizontal section of the second connecting plate 2.5 are respectively fitted into two or more sliding grooves (specifically, the sliding grooves are preferably four), so as to realize the connection between the jacking mechanism 3 and the traveling mechanism 2. Preferably, the telescopic boom 3.2 is extended and retracted by the telescopic drive member 3.4 to change the distance between the chassis 3.1 and the top plate 3.3, and the telescopic drive member 3.4 applies pre-pressure to the bottom plate of the hanging basket 1 to achieve the pre-pressure test of the hanging basket 1.

[0028] Optionally, the telescopic boom 3.2 includes multiple scissor frames that are hinged to each other. Each scissor frame includes a first square steel, a second square steel, and a connecting shaft. The first square steel and the second square steel are arranged in an intersecting manner, and the middle part of the first square steel and the second square steel is rotatably connected by the connecting shaft.

[0029] Optionally, the telescopic drive component 3.4 is preferably configured as a telescopic drive component structure, wherein one end of the telescopic drive component 3.4 is hinged to the i-th scissor frame, and the other end of the telescopic drive component 3.4 is hinged to the j-th scissor frame, where i≠j.

[0030] The load distribution mechanism 4 includes interconnected longitudinal distribution beams 4.1 and transverse distribution beams 4.2. Multiple longitudinal distribution beams 4.1 and transverse distribution beams 4.2 are provided, and these multiple longitudinal distribution beams 4.1 and transverse distribution beams 4.2 are interconnected to form a frame structure. Preferably, the longitudinal distribution beams 4.1 are disposed on the bottom plate of the hanging basket 1 to achieve interconnection between the load distribution mechanism 4 and the jacking mechanism 3.

[0031] In addition to the above structure, the construction preloading device for the hanging basket 1 of a continuous beam bridge provided by the present invention also includes a monitoring mechanism 5. The monitoring mechanism 5 includes a control box 5.1 and a pressure sensor 5.2 and a laser sensor 5.3 connected to the control box 5.1 by a signal connection. The pressure sensor 5.2 is located above the top plate 3.3 and is used to monitor the pressure transmitted from the jacking mechanism 3 to the hanging basket 1 in real time. The laser sensor 5.3 is located on the side of the top plate 3.3 and is used to monitor the displacement of the hanging basket 1 in real time.

[0032] Optionally, as needed, the construction preloading test device for the formwork of a continuous beam bridge provided by the present invention can be set up in multiple groups in parallel to ensure balanced load on the formwork.

[0033] See Figure 5 As shown, the present invention also provides a construction preloading test method for a continuous beam bridge formwork, specifically including the following steps: Step 1: After the formwork is erected on the bridge segment, install the construction preloading test device for the formwork of the continuous beam bridge as described above. Step 2: Conduct a pre-compression test on the hanging basket: The traveling mechanism drives the jacking mechanism to move above the longitudinal distribution beam. The telescopic drive drives the telescopic arm to extend, so as to increase the distance between the chassis and the top plate. When the telescopic arm extends above the top plate and the pressure sensor contacts the connecting beam and the chassis contacts the longitudinal distribution beam, an internal support is formed between the connecting beam and the longitudinal distribution beam. As the jacking force of the telescopic drive increases, a pre-compression load can be applied to the bottom plate of the hanging basket. Step 3: Calculate the displacement of the formwork: During the application of the preload, laser displacement sensors and pressure sensors can monitor the displacement from the sensors to the bottom plate of the formwork and the load magnitude in real time. The monitored data is transmitted to the control box, where the monitoring program performs data post-processing. The post-processing mainly calculates the precise displacement of the formwork based on material mechanics formulas, generating load-displacement tables and curves to reflect the load and deformation of the formwork, providing a reference for subsequent elevation adjustments. Specifically, the application of the preload generally adopts a graded loading method, which can be referenced in the standard "Technical Standard for Cantilever Construction of Bridges". The loading process is autonomously controlled by the control box according to the pre-input load parameters.

[0034] Optionally, the displacement calculation principle of the hanging basket is as follows: in: The displacement is monitored by the laser displacement sensor; This represents the deflection deformation of the longitudinal beam; This refers to the deflection deformation of the connecting beam; This represents the displacement of the hanging basket; , in: F This refers to the preload of the hanging basket, i.e., the load monitored by the pressure sensor. L U This is the distance between the centerline of the longitudinal wheel assembly and the edge of the bridge segment. L 工 For the length of the connecting beam, E U and E 工 The elastic modulus of the longitudinal beam and the connecting beam are respectively ( E U and E 工 (Obtained respectively based on the type of steel used in the production of the steel beams). I U and I 工 The moments of inertia of the longitudinal beam and the connecting beam are respectively. I U and I 工 (Calculated based on the formula for moment of inertia of the section according to the cross-sectional shape and size of the steel beam). b This is the distance from the centerline of the transverse wheel assembly to the nearest end of the connecting beam. L 工 , E U , E 工 , I U and I 工 The control box program can be built into the device during manufacturing. L U and b The actual displacement of the hanging basket can be set according to the loading point position. = - - .

[0035] Step 4: Complete the pre-stressing test of the current continuous beam bridge formwork and dismantle the pre-stressing device of the current connecting beam bridge formwork. Specifically, after the pre-stressing test is completed, the telescopic boom can be folded by controlling the descent of the telescopic drive component through the control box. Then, the pre-stressing device is removed at the anchorage node between the longitudinal beam and the bridge deck, and the entire structure is hoisted to the next bridge segment that needs to undergo a pre-stressing test, saving assembly time and construction costs.

[0036] Optionally, the specific process for installing the construction preloading test device for the continuous beam bridge formwork is as follows: S1.1 Installation of the traveling mechanism: One end of the longitudinal beam is anchored using the vertical prestressed threaded steel reserved on the bridge segment deck. The two longitudinal beams are symmetrically distributed along the centerline of the bridge segment, with the centerline of the beam as the reference. Two longitudinal wheel sets are installed inside the longitudinal beam as longitudinal power mechanisms. A connecting beam is installed between the two longitudinal wheel sets and connected with fully threaded bolts. Transverse wheel sets are installed on both sides of the connecting beam as transverse power mechanisms. The first connecting plate and the second connecting plate are connected to the transverse wheel sets by welding. The first connecting plate and the second connecting plate on both sides of the connecting beam are connected from the top using double-ended bolts.

[0037] S1.2 Installation of the jacking mechanism: After assembling the jacking mechanism, connect the jacking mechanism to the traveling mechanism, and connect the telescopic boom to the top plate and chassis respectively.

[0038] S1.3 Layout of load distribution mechanism: Select reasonable spacing and arrange the transverse distribution beams at equal intervals above the bottom plate of the hanging basket. Then arrange the two longitudinal distribution beams above the transverse distribution beams and make them pass through the preload points to ensure that the preload is evenly applied to the bottom plate of the hanging basket. The two preload points are generally located in the middle of the bottom plate of the hanging basket and are symmetrically distributed perpendicular to the longitudinal center axis of the hanging basket.

[0039] S1.4 Installation of the monitoring mechanism: Connect the control box to the longitudinal wheel set, the transverse wheel set, the laser displacement sensor, the pressure sensor and the telescopic drive component. The control box has built-in control and monitoring programs. Before the preload is applied, input the parameters such as the location of the preload point, the size of the preload and the loading time into the control box.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction preloading test device for a continuous beam bridge formwork, characterized in that, It includes a traveling mechanism (2) and a pushing mechanism (3); The traveling mechanism (2) is anchored and cantilevered on the bridge segment (6), and the traveling mechanism (2) is connected to the jacking mechanism (3) to drive the jacking mechanism (3) to move to the top plate of the hanging basket (1); The jacking mechanism (3) includes a chassis (3.1), a telescopic boom (3.2), and a top plate (3.3). One end of the telescopic boom (3.2) is connected to the chassis (3.1), and the other end of the telescopic boom (3.2) is connected to the top plate (3.3). The telescopic boom (3.2) changes the distance between the chassis (3.1) and the top plate (3.3) by the drive of the telescopic drive component (3.4). The chassis (3.1) contacts the longitudinal distribution beam (4.1) above the bottom plate of the hanging basket (1), so that the force of the telescopic drive component (3.4) is transmitted to the hanging basket (1) to realize the pre-compression test of the hanging basket (1). The telescopic boom (3.2) includes multiple scissor frames that are hinged to each other. The multiple scissor frames are connected sequentially along the height direction, wherein the uppermost scissor frame is fixedly connected to the top plate (3.3), and the lowermost scissor frame is fixedly connected to the chassis (3.1). The fixed end and the driving end of the telescopic drive (3.4) are respectively hinged to any two of the scissor frames.

2. The construction preloading test device for the formwork of a continuous beam bridge according to claim 1, characterized in that, The scissor frame includes a first square steel bar, a second square steel bar, and a connecting shaft. The first square steel bar and the second square steel bar are arranged to cross each other, and the middle parts of the first square steel bar and the second square steel bar are rotatably connected by the connecting shaft.

3. The construction preloading test device for the hanging basket of a continuous beam bridge according to claim 1, characterized in that, The traveling mechanism (2) includes a longitudinal beam (2.1), a connecting beam (2.2), a connecting assembly, and a longitudinal wheel set (2.3). The longitudinal beam (2.1) is provided with two pieces spaced apart from each other. The two longitudinal beams (2.1) are anchored and cantilevered on the bridge deck of the bridge segment (6), and both longitudinal beams (2.1) are provided with opposing longitudinal sliding bosses. The connecting beam (2.2) is provided with longitudinal wheel sets (2.3) at both ends, and slides within the longitudinal sliding boss through the longitudinal wheel sets (2.3); The connecting component is mounted on the connecting beam (2.2) and is used to connect with the jacking mechanism (3).

4. The construction preloading test device for the hanging basket of a continuous beam bridge according to claim 3, characterized in that, The longitudinal beam (2.1) is configured as one of the following: longitudinal beam structure, C-shaped steel beam structure or I-shaped steel beam structure; The connecting beam (2.2) is configured as one of the following: longitudinal beam structure, C-shaped steel beam structure or I-shaped steel beam structure.

5. The construction preloading test device for the hanging basket of a continuous beam bridge according to claim 3, characterized in that, The connecting beam (2.2) is configured as an I-beam steel beam structure; The connecting assembly includes a first connecting plate (2.4), a second connecting plate (2.5), a connector (2.6), and a transverse pulley assembly (2.7). The first connecting plate (2.4) and the second connecting plate (2.5) are respectively disposed on both sides of the connecting beam (2.2). The first connecting plate (2.4) and the second connecting plate (2.5) are connected to each other through the connector (2.6). A transverse pulley assembly (2.7) is provided on both the first connecting plate (2.4) and the second connecting plate (2.5). The transverse pulley assembly (2.7) is in rolling connection with the inner side of the connecting beam (2.2).

6. The construction preloading test device for the hanging basket of a continuous beam bridge according to claim 5, characterized in that, The first connecting plate (2.4) and the second connecting plate (2.5) are configured to be symmetrically arranged, and both the first connecting plate (2.4) and the second connecting plate (2.5) include vertical sections and horizontal sections that are connected to each other, and the vertical sections are connected to each other by connectors (2.6); Two or more sliding grooves are provided on the top plate (3.3) symmetrically arranged along the telescopic boom (3.2), and the horizontal section of the first connecting plate (2.4) and the horizontal section of the second connecting plate (2.5) are respectively fitted into the two sliding grooves.

7. The construction preloading test device for the formwork of a continuous beam bridge according to any one of claims 1-6, characterized in that, It also includes a load distribution mechanism (4), which is set on the bottom plate of the hanging basket (1) and connected to the bottom plate of the hanging basket (1) in a contact manner, for uniformly bearing the loading pressure of the jacking mechanism (3).

8. The construction preloading test device for the formwork of a continuous beam bridge according to claim 7, characterized in that, It also includes a monitoring mechanism (5), which includes a control box (5.1) and a pressure sensor (5.2) and a laser sensor (5.3) connected to the control box (5.1) by a signal; the pressure sensor (5.2) is used to monitor the pressure transmitted from the jacking mechanism (3) to the hanging basket (1) in real time; the laser sensor (5.3) is used to monitor the displacement of the hanging basket (1) in real time.

9. A preloading test method for the construction of a continuous beam bridge formwork, characterized in that, Includes the following steps: Step 1: Install the construction preloading test device for the continuous beam bridge formwork as described in claim 8; Step 2: Pre-compression test of the hanging basket: The traveling mechanism drives the jacking mechanism to move above the longitudinal distribution beam; the telescopic drive drives the telescopic arm to extend, so as to increase the distance between the chassis and the top plate, until the telescopic arm extends above the top plate so that the pressure sensor contacts the connecting beam and the chassis contacts the longitudinal distribution beam, so as to form an internal support between the connecting beam and the longitudinal distribution beam. The telescopic drive uses a graded loading method to continuously apply the jacking force, which can apply a pre-compression load to the hanging basket. Step 3: Calculate the displacement of the hanging basket: During the application of the preload, the laser displacement sensor and pressure sensor monitor the displacement and load of the hanging basket in real time, and transmit the monitored data to the control box in real time. The control box performs data post-processing on the received data to obtain the displacement of the hanging basket. Step 4: Complete the construction prestressing test of the current continuous beam bridge formwork and remove the construction prestressing device of the current continuous beam bridge formwork.

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