Cantilever continuous beam hanging basket main truss reverse preloading static load test device and process
The cantilever continuous beam hanging basket main truss reverse prestressing static load test device and process solves the problem of high safety risk in cantilever continuous beam construction, achieves force balance and accuracy of test data, and simplifies the operation process.
Patent Information
- Application Number
- CN202510721200.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2025-09-23
AI Technical Summary
In the existing technology, the safety risks of the main truss of the suspended continuous beam with a hanging basket during the construction process are high, especially the technical problems that the existing technology cannot effectively solve.
A cantilever continuous beam hanging basket main truss reverse prestressing device and process are adopted, including a device arranged on two hanging basket main trusses, including a device main body arranged on the two hanging basket main trusses, wherein the two hanging basket main trusses are horizontally symmetrically arranged, and the hanging basket main trusses include a front upper box body, a rear upper box body, a rear anchor box body and a front anchor box body arranged in a parallelogram shape, and rods are provided between the boxes; the device main body includes a main truss anchoring device, a reverse prestressing device, a fixed pressure beam device and a deformation monitoring device.
The horizontal symmetry of the two hanging basket main girders ensures balanced force, reduces the risk of overloading due to asymmetry during the test, improves the accuracy and safety of the test data, simplifies the operating process, and reduces construction risks.
Smart Images
Figure CN120685270A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of continuous beams, in particular to a cantilever continuous beam hanging basket main truss reverse pre-stressing static load test device and process. Background Art
[0002] Cantilever continuous beams are usually constructed in sections using a hanging basket. During the construction process, the load-bearing and linear shape of the segment concrete are controlled by the hanging basket system. Among them, the main truss system in the hanging basket system is the main structure. In large-span continuous beams, the segment concrete has a heavy self-weight and the construction quality and safety risks are high.
[0003] In the past, when cantilever continuous beams were constructed using hanging basket segments, after the hanging basket components were produced, the main truss system was pre-assembled in the factory, and then a static load test with preloading was carried out using a set-up platform support. This had high safety risks, was cumbersome to operate, and took a long time. Some hanging baskets were not pre-loaded or were only slightly pre-loaded before leaving the factory, and it was impossible to clearly detect the performance indicators of the hanging basket and the performance status of the equipment. Pre-loading was completely dependent on the completion of the overall assembly of the hanging basket at the construction site, which had high safety risks and low controllability. Summary of the Invention
[0004] The invention provides a cantilever continuous beam hanging basket main truss reverse pre-stressing static load test device, which can overcome certain defects of the prior art.
[0005] According to the present invention, a cantilever continuous beam hanging basket main girders reverse preloading static load test device comprises a device body provided on two hanging basket main girders, wherein the two hanging basket main girders are arranged horizontally symmetrically, and the hanging basket main girders comprise a front upper box body, a rear upper box body, a rear anchor box body, and a front anchor box body arranged in a parallelogram shape, and rods are provided between the boxes; the device body comprises: The main truss anchoring device includes a first fixing assembly provided at the front and rear ends of the main trusses of the two hanging baskets for side fixing; The reverse pre-compression device includes a jack assembly provided at the front end of the main truss of the hanging basket for providing opposite pressure; The fixed pressure beam device includes a second fixing assembly provided on the upper and lower end surfaces of the two hanging basket main girders for fixing the upper and lower end surfaces; and The deformation monitoring device includes a measuring device arranged on the top surface of the front upper box body of the two hanging basket main girders.
[0006] Through the present invention, the two main trusses of the hanging basket are arranged in horizontal symmetry to ensure balanced force and reduce the risk of overloading caused by asymmetry during the test; the first fixing component in the main truss anchoring device is fixed by the side, which effectively limits the lateral displacement of the main truss of the hanging basket and prevents structural instability caused by external force during the test; the second fixing component in the fixed pressure beam device realizes upper and lower end face fixation, further strengthens the longitudinal stability of the main truss of the hanging basket, and avoids local bending during loading; the jack assembly in the reverse preloading device applies opposite pressure to the front end of the main truss of the hanging basket, simulates the load under actual working conditions, and improves the accuracy of the test data; the measuring device arranged on the top surface of the front upper box body can collect structural deformation data in real time to ensure smooth data collection during the test.
[0007] Preferably, the jack assembly includes a jack arranged between the outer side of the front upper box body of a hanging basket main truss and the first fixed assembly, and a first supporting steel pad is provided at the contact point between the jack and the front upper box body.
[0008] Through the present invention, a high-strength first supporting steel plate is provided at the contact point between the jack and the front upper box body, which can evenly disperse the concentrated pressure applied by the jack to a larger contact area, thereby avoiding deformation or damage of the front upper box body structure due to local stress concentration. In high-load tests, the first supporting steel plate can effectively prevent the front upper box body from cracking or buckling due to local pressure, thereby protecting the main truss of the hanging basket.
[0009] Preferably, the first fixing component includes an I-beam shoulder beam which is arranged on the outside of the front upper box or the rear anchor box of the two hanging basket main trusses. A rectangular through hole is provided in the middle of the I-beam shoulder beam, and a plurality of first fine-rolled threaded steel bars are passed through the rectangular through hole. The first fine-rolled threaded steel bars are arranged parallel to the upper and lower end faces of the hanging basket main truss, and the first fine-rolled threaded steel bars are provided with a first nut for fixing the I-beam shoulder beam.
[0010] Through the present invention, the jack is located between the outer side of the front upper box body of the main truss of the hanging basket and the first fixed component, and cooperates with the I-beam shoulder beam and the first fine-rolled threaded steel bar arranged on the outer side of the front upper box body or the rear anchor box body of the two hanging basket main trusses to achieve unilateral pressure while ensuring that the two hanging basket main trusses are subjected to the same force; the first fixed component realizes the side fixation of the two hanging basket main trusses, and the I-beam shoulder beam used in the first fixed component has high bending strength and good lateral bearing capacity, which can effectively disperse the lateral force of the hanging basket main truss and avoid local stress concentration; multiple parallel arranged first fine-rolled threaded steel bars are fixed by nuts to form multi-point anchoring, which evenly transmits external force to the hanging basket main truss and reduces the risk of single-point force; the rectangular through hole in the middle of the I-beam shoulder beam allows the arrangement of the first fine-rolled threaded steel bars to be flexibly adjusted according to the size and position of the hanging basket main truss to adapt to different needs; the I-beam shoulder beam and the first fine-rolled threaded steel bar are both standardized components, which are convenient for rapid assembly and disassembly on site, shortening the construction period, and the nut fixing method allows worn or damaged components to be replaced individually without replacing the components as a whole, reducing maintenance costs.
[0011] Preferably, the second fixing component includes a double-jointed I-beam respectively arranged on the upper and lower end faces of the two hanging basket main trusses, the double-jointed I-beam is provided with a plurality of circular through holes, the circular through holes are penetrated by a second high-rolled threaded steel bar, and the second high-rolled threaded steel bar is provided with a second nut for fixing the two double-jointed I-beams.
[0012] Through the present invention, the arrangement of double-piece I-beams improves the bending resistance of the upper and lower end faces of the hanging basket main truss, can withstand greater longitudinal loads, and avoid longitudinal deformation or buckling of the hanging basket main truss during the test; multiple parallel arranged second high-precision rolled threaded steel bars are fixed by second nuts to form multi-point anchoring, which evenly transmits the longitudinal force to the hanging basket main truss, reduces local stress concentration, and improves the overall structural rigidity; the multiple circular through holes on the double-piece I-beams allow the position of the second high-precision rolled threaded steel bars to be flexibly adjusted according to the actual size and installation requirements of the hanging basket main truss, to adapt to different engineering scenarios.
[0013] Preferably, there are multiple first fixing components and multiple second fixing components.
[0014] Through the present invention, the arrangement of multiple first fixing components and second fixing components realizes redundant protection, improves structural safety, and prevents overall failure caused by failure of a single component.
[0015] Preferably, a second supporting steel pad is provided between the rear anchor box and the front anchor box of the two hanging basket main trusses.
[0016] Through the present invention, the second supporting steel plate serves as a connecting component in the main truss structure of the hanging basket, and is arranged between the rear anchor box and the front anchor box. When the main truss of the hanging basket is subjected to reverse preload static load, the steel plate can buffer the load change and protect the two main trusses of the hanging basket.
[0017] Preferably, the measuring device includes a measuring mark provided on the top of the front upper box of the two hanging basket main girders.
[0018] Through the present invention, the top of the front upper box body is the area that is most sensitive to deformation of the main girders of the hanging basket during reverse preloading or static load tests. Significant displacement or stress concentration is likely to occur in the initial stage of loading. By setting a measurement mark at this position, the key deformation characteristics of the structure can be captured in real time, providing high-precision data for subsequent analysis. In actual operation, instruments such as laser total stations can be used to observe the measurement marks and record the data; the top of the front upper box bodies of the two hanging basket main girders are arranged symmetrically, and separate measurement marks can be set in stable areas around the site as unified reference points for the bilateral structures. The deformation differences of the left and right symmetrical structures can be compared and analyzed based on the measurement results.
[0019] A cantilever continuous beam hanging basket main truss reverse preloading static load test process includes the following steps: Step S1: Place multiple double-jointed I-beams and adjust them to a horizontal position, hoist two hanging basket main girders above the double-jointed I-beams using a crane, and install a second support steel pad between the rear anchor box and the front anchor box of the two hanging basket main girders; Step S2: placing first fine-rolled threaded steel bars and I-beam shoulder beams at the front and rear ends of the main truss of the hanging basket for anchoring, installing a jack on one side of the front upper box body, and providing first supporting steel pads above and below the jack; Step S3: After the anchoring is completed, multiple double-jointed I-beams are hoisted and placed above the main truss of the hanging basket and aligned with the double-jointed I-beams below and then anchored to complete the main body of the device; Step S4: Calculate the corresponding applied load F according to the concrete weight of the largest construction section of the continuous beam; Step S5: Loading in stages, during which deformation data of the main girders of the hanging basket are measured. The deformation data include the distance L1 between the top surfaces of the front upper boxes of the two main girders of the hanging basket; Step S6: After loading is completed, perform hierarchical unloading; Step S7: Check the main truss of the hanging basket and determine whether it exceeds the threshold based on L1.
[0020] Through the present invention, the two hanging basket main girders are installed on the cantilever continuous beam hanging basket main girders reverse preloading static load device for preloading, which can improve the problems of high safety risks and cumbersome operation of the traditional hanging basket main girders being pre-assembled in the factory and then performing the preloading static load test using the erected platform support.
[0021] Preferably, the graded loading in step S5 is divided into four levels: 50%, 75%, 100% and 120% of the applied load F.
[0022] Through the present invention, graded loading is used to verify the structural performance. Preloading and preliminary verification are carried out at the 50% and 75% stages. The initial deformation of the structure is observed through low-load tests to verify the stability of the anchoring device, the precision-rolled threaded steel bars, and the I-beam shoulder beams. At the same time, the measuring device is observed to monitor the sensitivity of the L1 deformation data to ensure the normal operation of the data acquisition device. The design load verification is carried out at the 100% stage to simulate the maximum segment concrete weight in actual construction to verify the bearing capacity of the main truss of the hanging basket under extreme working conditions. The L1 data is used to determine whether the structure meets the design requirements, providing a benchmark for subsequent overload tests. The overload test is carried out at the 120% stage to verify the safety redundancy of the structure under loads exceeding the design value to ensure that it can withstand unexpected loads or construction errors.
[0023] Preferably, the graded unloading in step S6 is performed in reverse order of 100%, 75%, and 50% of the applied load F.
[0024] Through the present invention, in step S6, the unloading process adopts a graded unloading method from high to low 100% to 75% and then to 50%. This design reduces the risk of structural brittle failure by gradually releasing internal forces; accurately monitors the residual deformation and recovery capacity of the structure, verifies the structural stability, and significantly improves the safety of the test and the reliability of the data. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a schematic diagram of the cantilever continuous beam hanging basket main truss reverse preload static load test device; Figure 2 Schematic diagram of the reverse preloading device; Figure 3 This is a schematic diagram of the main truss of the hanging basket; Figure 4 is a schematic diagram of a first fixing component; Figure 5 Schematic diagram of the second fixing component. DETAILED DESCRIPTION
[0026] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.
[0027] Example 1 like Figure 1-5 As shown, this embodiment provides a cantilever continuous beam hanging basket main girder reverse prestressing static load test device, which includes a device body 110 provided on two hanging basket main girders 100, wherein the two hanging basket main girders 100 are arranged horizontally symmetrically, and the hanging basket main girder 100 includes a front upper box body 210, a rear upper box body 220, a rear anchor box body 230 and a front anchor box body 240 arranged in a parallelogram shape, and a rod 250 is provided between the boxes; the device body 110 includes: The main truss anchoring device 120 includes a first fixing assembly 121 provided at the front and rear ends of the two hanging basket main trusses 100 for side fixing; The reverse pre-compression device 130 includes a jack assembly 131 provided at the front end of the main truss 100 of the hanging basket for providing a counter pressure; The fixed pressure beam device 140 includes a second fixing assembly 141 provided on the upper and lower end surfaces of the two hanging basket main girders 100 for fixing the upper and lower end surfaces; and The deformation monitoring device 150 includes a measuring device 151 provided on the top surface of the front upper box body 210 of the two hanging basket main girders 100.
[0028] Through this embodiment, the two hanging basket main trusses 100 are arranged in horizontal symmetry to ensure balanced force and reduce the risk of overloading caused by asymmetry during the test; the first fixing component 121 in the main truss anchoring device 120 is fixed by the side, which effectively limits the lateral displacement of the hanging basket main truss 100 and prevents structural instability caused by external force during the test; the second fixing component 141 in the fixed pressure beam device 140 realizes the fixation of the upper and lower end faces, further strengthens the longitudinal stability of the hanging basket main truss 100, and avoids local bending during loading; the jack assembly 131 in the reverse preloading device 130 applies opposite pressure to the front end of the hanging basket main truss 100 to simulate the load under actual working conditions and improve the accuracy of the test data; the measuring device 151 arranged on the top surface of the front upper box 210 can collect structural deformation data in real time to ensure smooth data collection during the test.
[0029] In this embodiment, the jack assembly 131 includes a jack 310 arranged between the outer side of the front upper box body 210 of the hanging basket main truss 100 and the first fixing assembly 121, and a first supporting steel pad 320 is provided at the contact point between the jack 310 and the front upper box body 210.
[0030] Through this embodiment, a high-strength first support steel plate 320 is provided at the contact point between the jack and the front upper box body 210, which can evenly disperse the concentrated pressure applied by the jack 310 to a larger contact area, thereby avoiding deformation or damage of the front upper box body 210 due to local stress concentration. In high-load tests, the first support steel plate 320 can effectively prevent the front upper box body 210 from cracking or buckling due to local pressure, thereby protecting the main girder 100 of the hanging basket.
[0031] In this embodiment, the first fixing component 121 includes an I-beam shoulder beam 410 which is respectively arranged on the outside of the front upper box 210 or the rear anchor box 230 of the two hanging basket main trusses 100. A rectangular through hole 420 is provided in the middle of the I-beam shoulder beam 410, and a plurality of first fine-rolled threaded steel bars 430 are passed through the rectangular through hole 420. The first fine-rolled threaded steel bars 430 are arranged parallel to the upper and lower end surfaces of the hanging basket main truss 100, and a first nut 440 for fixing the I-beam shoulder beam 410 is provided on the first fine-rolled threaded steel bar 430.
[0032] Through this embodiment, the jack 310 is located between the outer side of the front upper box body 210 of the hanging basket main truss 100 and the first fixing assembly 121, and cooperates with the I-beam shoulder beam 410 and the first precision-rolled threaded steel 430 arranged on the outer side of the front upper box body 210 or the rear anchor box body 230 of the two hanging basket main trusses 100 to achieve unilateral pressure while ensuring that the two hanging basket main trusses 100 are subjected to the same force; the first fixing assembly 121 realizes the side fixation of the two hanging basket main trusses 100, and the I-beam shoulder beam 410 used in the first fixing assembly 121 has high bending strength and good lateral bearing capacity, which can effectively disperse the lateral force of the hanging basket main truss 100 and avoid local Stress concentration; multiple parallel arranged first fine-rolled threaded steel bars 430 are fixed by nuts to form multi-point anchoring, which evenly transmits external force to the main truss 100 of the hanging basket and reduces the risk of single-point force; the rectangular through hole 420 in the middle of the I-beam shoulder beam 410 allows the arrangement of the first fine-rolled threaded steel bars 430 to be flexibly adjusted according to the size and position of the main truss 100 of the hanging basket to meet different needs; the I-beam shoulder beam 410 and the first fine-rolled threaded steel bars 430 are both standardized components, which are convenient for rapid assembly and disassembly on site, shortening the construction period, and the nut fixing method allows the worn or damaged parts to be replaced individually without replacing the entire assembly, reducing maintenance costs.
[0033] In this embodiment, the second fixing assembly 141 includes a double-jointed I-beam 510 respectively arranged on the upper and lower end surfaces of the two hanging basket main trusses 100. The double-jointed I-beam 510 is provided with a plurality of circular through holes 520. The circular through holes 520 are penetrated by a second high-precision rolled threaded steel 530. The second high-precision rolled threaded steel 530 is provided with a second nut 540 for fixing the two double-jointed I-beams 510.
[0034] Through this embodiment, the setting of the double-piece I-beam 510 improves the bending resistance of the upper and lower end surfaces of the hanging basket main truss 100, can withstand greater longitudinal loads, and avoid longitudinal deformation or buckling of the hanging basket main truss 100 during the test; multiple parallel arranged second fine-rolled threaded steel bars 530 are fixed by second nuts 540 to form multi-point anchoring, which evenly transmits the longitudinal force to the hanging basket main truss 100, reduces local stress concentration, and improves the overall structural rigidity; the multiple circular through holes 520 on the double-piece I-beam 510 allow the position of the second fine-rolled threaded steel bars 530 to be flexibly adjusted according to the actual size and installation requirements of the hanging basket main truss 100 to adapt to different engineering scenarios.
[0035] In this embodiment, there are multiple first fixing components 121 and multiple second fixing components 141 .
[0036] Through this embodiment, the provision of multiple first fixing components 121 and second fixing components 141 achieves redundant protection, improves structural safety, and prevents overall failure caused by failure of a single component.
[0037] In this embodiment, a second supporting steel pad 160 is provided between the rear anchor box 230 and the front anchor box 240 of the two hanging basket main girders 100 .
[0038] Through this embodiment, the second supporting steel plate 160 serves as a connecting component in the structure of the hanging basket main truss 100. It is arranged between the rear anchor box 230 and the front anchor box 240. When the hanging basket main truss 100 is subjected to reverse pre-stressed static load, the steel plate can buffer the load changes and protect the two hanging basket main trusses 100.
[0039] In this embodiment, the measuring device 151 includes a measuring mark 330 provided on the top of the front upper box 210 of the two hanging basket main girders 100.
[0040] Through this embodiment, the top of the front upper box body 210 is the area of the main girder 100 of the hanging basket that is most sensitive to deformation during the reverse preload or static load test. Significant displacement or stress concentration is likely to occur at the initial stage of loading. Setting a measurement mark 330 at this position can capture the key deformation characteristics of the structure in real time and provide high-precision data for subsequent analysis. In actual operation, instruments such as a laser total station can be used to observe the measurement mark 330 and record the data. The tops of the front upper boxes 210 of the two hanging basket main girder 100 are arranged symmetrically. Separate measurement marks 330 can be set in stable areas around the site as unified reference points for the bilateral structures. The deformation differences of the left and right symmetrical structures can be compared and analyzed based on the measurement results.
[0041] This embodiment also includes a cantilever continuous beam hanging basket main truss reverse preload static load test process, including the following steps: Step S1: Place multiple double-jointed I-beams 510 and adjust them to a horizontal position. Hoist two hanging basket main girders 100 above the double-jointed I-beams 510 using a crane. Install a second support steel pad 160 between the rear anchor box 230 and the front anchor box 240 of the two hanging basket main girders 100. Step S2: First fine-rolled threaded steel bars 430 and I-beam shoulder beams 410 are placed at the front and rear ends of the hanging basket main truss 100 for anchoring, and a jack 310 is installed on one side of the front upper box body 210. First support steel pads 320 are provided above and below the jack 310. Step S3: After the anchoring is completed, multiple double-jointed I-beams 510 are hoisted and placed above the main truss 100 of the hanging basket and aligned with the double-jointed I-beams 510 below and then anchored to complete the installation of the device body 110; Step S4: Calculate the corresponding applied load F according to the concrete weight of the largest construction section of the continuous beam; Step S5: Loading in stages, during which the structural deformation data of the main girders 100 of the hanging basket is measured. The deformation data includes the distance L1 between the top surfaces of the front upper boxes 210 of the two main girders 100 of the hanging basket; Step S6: After loading is completed, perform hierarchical unloading; Step S7: Check the main truss 100 of the hanging basket and determine whether it exceeds the threshold based on L1.
[0042] Through this embodiment, the two hanging basket main girders 100 are installed on the cantilever continuous beam hanging basket main girders 100 reverse prestressing static load device for prestressing, which can improve the problems of high safety risks and cumbersome operation of the traditional hanging basket main girders 100 being pre-assembled in the factory and then performing the prestressing static load test using the erected platform support.
[0043] In this embodiment, the graded loading in step S5 is divided into four levels: 50%, 75%, 100%, and 120% of the applied load F.
[0044] Through this embodiment, graded loading is used to verify the structural performance. Preloading and preliminary verification are carried out at the 50% and 75% stages. The initial deformation of the structure is observed through low-load tests to verify the stability of the anchoring device, the precision-rolled threaded steel bars, and the I-beam shoulder beam 410. At the same time, the measuring device 151 is observed to monitor the sensitivity of the L1 deformation data to ensure the normal operation of the data acquisition device. The design load verification is carried out at the 100% stage to simulate the maximum segment concrete weight in actual construction to verify the bearing capacity of the hanging basket main truss 100 under extreme working conditions. The L1 data is used to determine whether the structure meets the design requirements, providing a benchmark for subsequent overload tests. The overload test is carried out at the 120% stage to verify the safety redundancy of the structure under loads exceeding the design load to ensure that it can withstand unexpected loads or construction errors.
[0045] In this embodiment, the graded unloading in step S6 is performed in the reverse order of 100%, 75%, and 50% of the applied load F.
[0046] Through this embodiment, in step S6, the unloading process adopts a graded unloading method from high to low 100% to 75% and then to 50%. This design reduces the risk of structural brittle failure by gradually releasing internal forces; accurately monitors the residual deformation and recovery capacity of the structure, verifies the structural stability, and significantly improves the safety of the test and the reliability of the data.
[0047] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.
[0048] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The embodiments shown in the embodiments are only part of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs a structure and embodiment similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.
Claims
1. Cantilever continuous beam hanging basket main truss reverse preload static load test device, characterized by: The invention comprises a device body (110) arranged on two hanging basket main girders (100), wherein the two hanging basket main girders (100) are arranged horizontally symmetrically, and the hanging basket main girders (100) comprise a front upper box body (210), a rear upper box body (220), a rear anchor box body (230) and a front anchor box body (240) arranged in a parallelogram shape, and rods (250) are provided between the boxes to connect them; the device body (110) comprises: A main truss anchoring device (120) comprises first fixing components (121) provided at the front and rear ends of the two hanging basket main trusses (100) for side fixing; The reverse pre-compression device 130 includes a jack assembly 131 provided at the front end of the main truss 100 of the hanging basket for providing a counter pressure; A fixed pressure beam device (140) comprises a second fixing assembly (141) provided on the upper and lower end surfaces of the two hanging basket main girders (100) for fixing the upper and lower end surfaces; and The deformation monitoring device (150) comprises a measuring device (151) provided on the top surface of the front upper box body (210) of the two hanging basket main girders (100).
2. The cantilever continuous beam hanging basket main truss reverse preload static load test device according to claim 1, characterized in that: The jack assembly (131) includes a jack (310) disposed between the outer side of a front upper box body (210) of a hanging basket main girder (100) and a first fixing assembly (121), and a first supporting steel pad (320) is provided at the contact point between the jack (310) and the front upper box body (210).
3. The cantilever continuous beam hanging basket main truss reverse preload static load test device according to claim 1, characterized in that: The first fixing assembly (121) comprises an I-beam shoulder beam (410) respectively arranged on the outside of the front upper box (210) or the rear anchor box (230) of the two hanging basket main girders (100); a rectangular through hole (420) is provided in the middle of the I-beam shoulder beam (410); a plurality of first fine-rolled threaded steel bars (430) are passed through the rectangular through hole (420); the first fine-rolled threaded steel bars (430) are arranged parallel to the upper and lower end surfaces of the hanging basket main girders (100); and a first nut (440) for fixing the I-beam shoulder beam (410) is provided on the first fine-rolled threaded steel bars (430).
4. The cantilever continuous beam hanging basket main truss reverse preload static load test device according to claim 1, characterized in that: The second fixing assembly (141) includes a double-jointed I-beam (510) provided on the upper and lower end surfaces of the two hanging basket main girders (100), wherein the double-jointed I-beam (510) is provided with a plurality of circular through holes (520), wherein second fine-rolled threaded steel (530) is passed through the circular through holes (520), and a second nut (540) for fixing the two double-jointed I-beams (510) is provided on the second fine-rolled threaded steel (530).
5. The cantilever continuous beam hanging basket main truss reverse preload static load test device according to claims 3 and 4, characterized in that: There are multiple first fixing components (121) and multiple second fixing components (141).
6. The cantilever continuous beam hanging basket main truss reverse preload static load test device according to claim 1, characterized in that: A second supporting steel pad (160) is provided between the rear anchor box (230) and the front anchor box (240) of the two hanging basket main girders (100).
7. The cantilever continuous beam hanging basket main truss reverse preload static load test device according to claim 1, characterized in that: The measuring device (151) includes a measuring mark (330) provided on the top of the front upper box (210) of the two hanging basket main girders (100).
8. The cantilever continuous beam hanging basket main truss reverse preload static load test process is characterized by: The following steps are involved: Step S1: placing a plurality of double-jointed I-beams (510) and adjusting them to a horizontal position, hoisting two hanging basket main girders (100) above the double-jointed I-beams (510) by a crane, and setting a second supporting steel pad (160) between the anchor boxes (230) and the front anchor boxes (240) of the two hanging basket main girders (100); Step S2: placing a first finely rolled threaded steel bar (430) and an I-beam shoulder beam (410) at the front and rear ends of the hanging basket main truss (100) for anchoring, installing a jack (310) on one side of the front upper box body (210), and providing a first supporting steel pad (320) above and below the jack (310); Step S3: After the anchoring is completed, a plurality of double-jointed I-beams (510) are hoisted and placed above the main truss (100) of the hanging basket and aligned with the double-jointed I-beams (510) below and then anchored, thereby completing the installation of the device body (110); Step S4: Calculate the corresponding applied load F according to the concrete weight of the largest construction section of the continuous beam; Step S5: loading in stages, during which deformation data of the main girder (100) of the hanging basket is measured, wherein the deformation data includes a distance L1 between the top surfaces of the front upper boxes (210) of the two main girders (100); Step S6: After loading is completed, perform hierarchical unloading; Step S7: Check the main girder (100) of the hanging basket and determine whether it exceeds the threshold value based on L1.
9. The cantilever continuous beam hanging basket main truss reverse preloading static load test process according to claim 8, characterized in that: In step S5, the graded loading is divided into four levels: 50%, 75%, 100%, and 120% of the applied load F.
10. The cantilever continuous beam hanging basket main truss reverse preloading static load test process according to claim 8, characterized in that: In step S6, the graded unloading is performed in the reverse order of 100%, 75%, and 50% of the applied load F.