Self-balancing prestressed fish-bellied beam supporting device

Abstract

The application discloses a self-balancing prestressed fish-belly beam supporting device and belongs to the technical field of fish-belly beams. The self-balancing prestressed fish-belly beam supporting device comprises a waist beam, a plurality of web bars are arranged at the middle part of the waist beam at intervals, triangular beams are fixedly connected to both ends of the waist beam, a plurality of strands of steel strands are arranged between the plurality of web bars and the triangular beams, a multi-hole anchor is arranged at the triangular beam and used for anchoring corresponding end parts of the plurality of strands of steel strands, a through jack is arranged at the outer side of the multi-hole anchor and used for externally pulling the plurality of strands of steel strands from the corresponding end parts, and a monitoring and adjusting device is arranged at the triangular beam and used for monitoring the displacement of the plurality of strands of steel strands. The application effectively solves the problems that the existing design structure is not reasonable and the anchoring core and the steel strands are deviated (the welding points of the steel strands and the triangular beams or the waist beam are damaged) due to construction vibration, the tensioning capacity of the steel strands is insufficient, emergency adjustment cannot be performed, and certain safety hazards exist.

Description

Technical Field

[0001] This invention relates to the field of fish-belly beam technology, and in particular to a self-balancing prestressed fish-belly beam support device. Background Technology

[0002] To meet the demands of urban land use, foundation pit engineering is developing towards deeper excavations, larger areas, and more complex surrounding environments. Due to relevant laws and regulations and the constraints of complex surrounding environments at construction sites, the application of pile-anchor support is hindered, and internal bracing has become the main form of foundation pit support. Although traditional concrete foundation pit support has a long curing time and can control the deformation requirements of foundation pit excavation, it also has some shortcomings. For example, in foundation pits supported by existing reinforced concrete or steel supports, the dense distribution of braces, corner braces, and columns results in a narrow construction space, which brings great difficulties to the excavation and transportation of soil. Cranes and grab buckets must be used in conjunction with trestle bridges for excavation and transportation, affecting construction efficiency. Moreover, the dismantling of concrete supports requires the use of pre-determined blasting methods, leaving behind a large amount of waste. In contrast, the prestressed fish-belly beam support structure can save certain costs compared to traditional internal bracing systems. It can also be installed and dismantled quickly, and has a large space for excavation and basement construction, which can save some construction time.

[0003] While the fish-belly beam support has been widely promoted and applied, it has been found that the structural design of the tensioning end of the fish-belly beam is not entirely reasonable. The steel strands are prone to overlapping and locking at the tensioning end guide plate, making prestressing difficult and resulting in excessively long steel strand construction time. In addition, after the fish-belly beam structure is installed, the steel strands at the tensioning end are mostly fixed to the triangular beam or waist beam by anchors or welding. Due to the vibrations that occur during construction, the fish-belly beam support structure resonates with these vibrations. After long-term use, this can easily cause the anchor core and steel strands to shift (the weld points where the steel strands are welded to the triangular beam or waist beam will be damaged), resulting in insufficient tensioning capacity of the steel strands. At the same time, it cannot be automatically adjusted, posing certain safety hazards and failing to meet the requirements of deep foundation pit support. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the existing structural design is not entirely reasonable and the construction resonance causes the anchor core and steel strand to deviate (the weld point of the steel strand to the triangular beam or waist beam is damaged), resulting in insufficient tension of the steel strand, inability to make emergency adjustments, and certain safety hazards.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A self-balancing prestressed fish-belly beam support device includes a waist beam, with multiple web members spaced apart in the middle of the waist beam. Triangular beams are fixedly connected to both ends of the waist beam. Multiple strands of steel wire are arranged between the web members and the triangular beams. A multi-hole anchor is provided at the triangular beam for anchoring the corresponding ends of the multiple strands of steel wire. A through-hole jack is provided on the outside of the multi-hole anchor for pulling the multiple strands of steel wire outward from their corresponding ends. A monitoring and adjustment device is provided at the triangular beam for monitoring the displacement of the multiple strands of steel wire. The monitoring and adjustment device generates control commands to control the action of the through-hole jack when abnormal displacement of the multiple strands of steel wire occurs.

[0007] Preferably, a positioning ring is fixedly installed between the core jack and the multi-hole anchor in the multi-strand steel wire, and the monitoring and adjustment device includes a displacement sensor installed at the triangular beam, which is used to monitor the displacement of the positioning ring;

[0008] The monitoring and control device also has a processing module and an output module. The processing module is used to generate a displacement warning value Fc based on the displacement signal collected by the displacement sensor. The output module is used to generate an output signal when the displacement warning value Fc exceeds the set displacement warning value threshold Qz. The output signal includes a control command for controlling the action of the through-hole jack and an alarm command for controlling the action of the alarm module.

[0009] Preferably, the displacement sensor is used to continuously collect the displacement of the positioning ring; the processing module is used to acquire the displacement warning value Fc based on the number of times Pe and the average interval Wa of the displacement signal abnormalities within a set time period T.

[0010]

[0011]

[0012] Where c1 and c2 are set proportional coefficients; α is a set compensation coefficient; t i This is the time interval between the i-th displacement signal anomaly within a set time period T and the previous anomaly.

[0013] Preferably, each of the triangular beams is fixedly connected to a connecting frame, which is perpendicular to the waist beam (1). A multi-hole anchor is fixedly connected to the connecting frame. A tensioning plate is provided on the side of the triangular beam near the web member for multiple strands of steel wire to pass through. Multiple through holes are provided on the tensioning plate in a circumferential arrangement.

[0014] Preferably, a gathering mechanism is provided between the core jack and the multi-hole anchor for the multi-strand steel strand, and the gathering mechanism has the tendency to keep the corresponding part of the multi-strand steel strand away from the multi-hole anchor.

[0015] Preferably, the convergence mechanism includes a fixing ring and an anchor core. The fixing ring is fixedly connected to the connecting frame. A constraint ring is snapped onto the side of the fixing ring near the multi-hole anchor. A tapered sleeve is fixedly connected to the other side of the fixing ring. An extension tube is fixedly connected to the side of the tapered sleeve away from the fixing ring. A sleeve is slidably installed on the extension tube. A second inner tapered groove is provided on the inner wall of the sleeve near the tapered sleeve. A first inner tapered groove is provided on the inner wall of the other side of the sleeve. A spring is fixedly connected between the fixing ring and the sleeve. The spring is sleeved on the tapered sleeve and is used to maintain the tendency of the fixing ring away from the multi-hole anchor.

[0016] Preferably, a top support mechanism is fixedly connected to the top of each web member. The top support mechanism includes a mounting plate, which is installed on the web member by bolts and threads. A force-holding box is fixedly connected to the mounting plate. The top of the force-holding box has an insertion interface, and multiple insertion interfaces are snapped in to adjust the extension length of the top block. A top block is slidably installed at the end of the force-holding box away from the web member. A support component is fixedly connected inside the top block, and the end of the support component away from the top block is fixedly connected to the inner wall of the force-holding box.

[0017] Preferably, the top block is fixedly connected to an abutment seat at the end away from the power box. The abutment seat is provided with a through groove for the steel strand to pass through. Multiple arc-shaped grooves are provided on the side of the through groove near the top block. Multiple safety rods are fixedly connected to the inner wall of the abutment seat, and all the safety rods are located above the steel strand.

[0018] Preferably, the anchor core is engaged with the multi-strand steel strand, and the anchor core is engaged inside the first inner conical groove.

[0019] Preferably, diagonal braces are provided on both sides of the web members, and the ends of the diagonal braces away from the web members are fixedly connected to the waist beam, and connecting rods are provided between adjacent web members.

[0020] Compared with the prior art, the present invention provides a self-balancing prestressed fish-belly beam support device, which has the following beneficial effects:

[0021] 1. This invention, through the setting of monitoring and adjustment device and through-hole jack, when the displacement warning value Fc ≥ displacement warning value threshold Qz, the output module generates an output signal to alarm and control the through-hole jack 9 to work to pull the second single-hole anchor 10 at the end of the steel strand outward, to perform automatic emergency tensioning, improve the safety of the overall structure, and at the same time remind the user to repair and restore the original position in time. When the displacement warning value Fc < displacement warning value threshold Qz, an alarm is triggered to remind the user to perform timely inspection.

[0022] 2. The present invention, through the setting of connecting frame, tightening plate, multi-hole anchor and gathering mechanism, avoids the loosening of multiple steel strands on multi-hole anchor affecting the overall strength, and improves the safety factor of the overall structure. At the same time, the multi-strand steel strands are organized, which not only avoids the multi-strand steel strands from tangling and affecting the stress, but also makes it easier to gather the multi-strand steel strands into one strand to improve its stress strength. The gathering mechanism can not only serve as a gathering mechanism to reduce early warning error, but also serve as an anchor in emergency situations.

[0023] 3. By setting up the top support mechanism, this invention facilitates the adjustment of multiple web members to fully contact the steel strand during tensioning, thereby increasing the prestress in the steel strand and thus improving the overall structural strength of the fish-belly beam. It also changes the stress distribution of the support rods. At the same time, adjusting the height of the two outermost top support mechanisms makes it easier to control the inclination angle of the steel strand, so that the steel strand fits better with the outer wall of the triangular beam and reduces the stress at the connection of the steel strand. Attached Figure Description

[0024] Figure 1 This is a top view schematic diagram of the overall structure of a self-balancing prestressed fish-belly beam support device proposed in this invention.

[0025] Figure 2 This is a schematic diagram of the overall side view of a self-balancing prestressed fish-belly beam support device proposed in this invention.

[0026] Figure 3 This is a schematic diagram of the triangular beam, connecting frame, and tightening plate structure of a self-balancing prestressed fish belly beam support device proposed in this invention.

[0027] Figure 4 This is a schematic diagram showing the positional distribution of the multi-hole anchor, the convergence mechanism, the through-hole jack, and the second single-hole anchor in a self-balancing prestressed fish-belly beam support device proposed in this invention.

[0028] Figure 5 This is a schematic cross-sectional view of the convergence mechanism of a self-balancing prestressed fish-belly beam support device proposed in this invention.

[0029] Figure 6 This is a schematic diagram of the top support mechanism of a self-balancing prestressed fish belly beam support device proposed in this invention.

[0030] Drawing number descriptions: 1. Waist beam; 2. Web member; 3. Diagonal brace; 4. Connecting rod; 5. Top support mechanism; 501. Mounting plate; 502. Force holding box; 5021. Insertion interface; 503. Top block; 504. Telescopic tube; 505. Abutment seat; 506. Arc block; 507. Safety rod; 6. Triangular beam; 601. Connecting frame; 602. Tightening plate; 7. Multi-hole anchor; 8. Contraction mechanism; 801. Fixing ring; 802. Guide plate; 803. Conical sleeve; 804. Extension tube; 805. Sleeve; 8051. First inner conical groove; 8052. Second inner conical cavity groove; 806. Spring; 807. Anchor core; 9. Through-hole jack; 10. Second single-hole anchor; 11. Steel strand; 12. Guide seat; 13. Positioning ring; 14. Monitoring and adjustment device. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example 1:

[0033] Please see Figure 1-6 A self-balancing prestressed fish-belly beam support device includes a waist beam 1, with multiple web members 2 spaced apart in the middle of the waist beam 1. The length of the web members 2 decreases towards both sides. There can be one or two web members 2 in the middle; if there are two, they are of equal length. Diagonal braces 3 are provided on both sides of each web member 2, with the ends of the diagonal braces 3 away from the web members 2 fixedly connected to the waist beam 1. Connecting rods 4 are provided between adjacent web members 2. Triangular beams 6 are fixedly connected to both ends of the waist beam 1. Multiple strands of steel wire 11 are provided between the multiple web members 2 and the triangular beams 6. The steel wire 11, triangular beams 6, and waist beam 1 form a fish-belly-shaped structure. Multi-hole anchors 7 are provided at the triangular beams 6 for anchoring the corresponding ends of the multiple strands of steel wire 11. Connecting rods are fixedly connected inside each triangular beam 6. The frame 601 is perpendicular to the hypotenuse of the triangular beam 6. The multi-hole anchor 7 is fixedly connected inside the frame 601. The multi-hole anchor 7 and the tensioning plate 602 are provided with multiple through holes arranged in a circumferential pattern at equal intervals. These holes are used to organize the multi-strand steel strands 11, which not only prevents the multi-strand steel strands 11 from tangling and affecting the stress, but also facilitates the gathering mechanism 8 to gather the multi-strand steel strands 11 into one strand. A through-hole jack 9 is provided on the outside of the multi-hole anchor 7. The through-hole jack 9 is used to pull the multi-strand steel strands 11 outward from the corresponding end. A monitoring and adjustment device 14 is provided at the triangular beam 6 to monitor the displacement of the multi-strand steel strands 11. The monitoring and adjustment device 14 is used to generate control commands to control the action of the through-hole jack 9 when the displacement of the multi-strand steel strands 11 is abnormal.

[0034] The top support mechanism 5 includes a mounting plate 501, which is bolted to the web member 2. A force-holding box 502 is fixedly connected to the mounting plate 501. The top of the force-holding box 502 has an insertion interface 5021, and multiple 508s are snapped into the insertion interface 5021. The 508s are used to adjust the extension length of the top block 503. The top block 503 is slidably mounted on the end of the force-holding box 502 away from the web member 2. A support assembly 504 is fixedly connected inside the top block 503. It can be a telescopic column. The support component 504 is fixedly connected to the inner wall of the power box 502 at one end away from the top block 503. The top block 503 is fixedly connected to the abutment seat 505 at one end away from the power box 502. The abutment seat 505 is provided with a through groove 506 for the steel strand 11 to pass through. The through groove 506 is provided with multiple arc-shaped grooves on the side near the top block 503. Multiple safety rods 507 are fixedly connected to the inner wall of the abutment seat 505. All the safety rods 507 are located above the steel strand 11.

[0035] The top support mechanism 5 is used to facilitate the adjustment of multiple web members 2 to fully contact the steel strand 11 during tensioning, thereby increasing the prestress in the steel strand 11, thus improving the overall structural strength of the fish belly beam, changing the stress distribution of the support rods, and adjusting the height of the two outermost top support mechanisms 5 to facilitate the control of the inclination angle of the steel strand 11, so that the steel strand 11 fits better with the outer wall of the triangular beam 6, reducing the stress at the connection of the steel strand 11. The top block 503 is fixedly connected to the end away from the force box 502 with an abutment seat 505. The abutment seat 505 is provided with a through groove 506 for the steel strand 11 to pass through. Multiple arc grooves are provided on the side of the through groove 506 near the top block 503. Multiple safety rods 507 are fixedly connected to the inner wall of the abutment seat 505. All safety rods 507 are located above the steel strand 11.

[0036] A second single-hole anchor 10 is provided at the end of the multi-strand steel strand 11. The distance between the second single-hole anchor 10 and the through-hole jack 9 is equal to the distance between the sleeve 805 and the tapered sleeve 803. A gathering mechanism 8 is provided on the multi-strand steel strand 11 to gather the multi-strand steel strand 11. The gathering mechanism 8 is fixedly connected to the connecting frame 601. The gathering mechanism 8 includes a fixing ring 801 and an anchor core 807. The fixing ring 801 is fixedly connected to the connecting frame 601. A constraint ring 802 is engaged with the side of the fixing ring 801 near the multi-hole anchor 7 to gather the multi-strand steel strand 11. On the one hand, the gathered steel strand 11 has a limiting effect on the constraint ring 802. On the other hand, it better organizes the multi-strand steel strand 11, making it easier for the through-hole jack 9 to tension it. The other side of the fixing ring 801 is fixedly connected to... A tapered sleeve 803 is connected to the sleeve. An extension tube 804 is fixedly connected to the side of the tapered sleeve 803 away from the fixing ring 801. A sleeve 805 is slidably installed on the extension tube 804. A second inner tapered groove 8052 is provided on the inner wall of the sleeve 805 near the tapered sleeve 803. A first inner tapered groove 8051 is provided on the inner wall of the other side of the sleeve 805. A spring 806 is fixedly connected between the fixing ring 801 and the sleeve 805. The spring 806 is sleeved on the tapered sleeve 803. The spring 806 is used to maintain the tendency of the fixing ring 801 away from the multi-hole anchor 7. An anchor core 807 is snapped onto the multi-strand steel strand 11. The anchor core 807 is snapped into the first inner tapered groove 8051. The second inner tapered groove 8052 and the outer wall of the tapered sleeve 803 can also be regarded as having the same function as the anchor after the steel strand 11 is loosened.

[0037] When the upper limit of the multi-hole anchor 7 steel strand 11 becomes loose, the steel strand 11 pulls the guide plate 802 to move inward. The guide plate 802 moves outward, causing the anchor core 807 on the steel strand 11 to move inward. The movement of the anchor core 807 causes the sleeve 805 to move along the extension tube 804. After loosening, it can also be regarded as having the same function as the anchor. The retraction mechanism can not only act as a retraction mechanism to reduce early warning errors, but also act as an anchor in an emergency.

[0038] Example 2:

[0039] The difference from Embodiment 1 is that:

[0040] A positioning ring 13 is fixedly installed between the through-hole jack 9 and the multi-hole anchor 7 in the multi-strand steel strand 11. The monitoring and adjustment device 14 includes a displacement sensor installed at the triangular beam 6. The displacement sensor is used to monitor the displacement of the positioning ring 13.

[0041] The monitoring and adjustment device 14 also has a processing module and an output module. The processing module is used to generate a displacement warning value Fc based on the displacement signal collected by the displacement sensor. The output module is used to generate an output signal when the displacement warning value Fc exceeds the set displacement warning value threshold Qz. The output signal includes a control command for controlling the action of the through-hole jack 9 and an alarm command for controlling the action of the alarm module.

[0042] It is understandable that the through-hole jack 9, as an existing device, can be controlled by a matching driver. The control command in this embodiment can enable the driver to drive the through-hole jack 9 to move a set distance. In addition, the alarm module can be a host computer located at a remote end or a sound and light alarm located at the triangular beam 6. The displacement sensor, as an existing device, usually has a fixed end and a moving end. In this embodiment, the fixed end can be located at the triangular beam 6 and the moving end can be located at the positioning ring 13. Other details are not described in this embodiment.

[0043] The displacement sensor is used to continuously collect the displacement of the positioning ring (13); the processing module is used to obtain the displacement warning value Fc based on the number of times Pe and the average interval Wa of the displacement signal abnormality within a set time T (30s-60s).

[0044]

[0045]

[0046] Where c1 and c2 are set proportional coefficients (1); α is a set compensation coefficient (0.21); t i The time interval between the i-th displacement signal anomaly within a set time period T and the previous anomaly.

[0047] When the displacement warning value Fc ≥ the displacement warning value threshold Qz, the output module generates an output signal to alarm and control the drive of the through-hole jack 9 to tension the second single-hole anchor 10 at the end of the steel strand outward, performing automatic emergency tensioning to improve the safety of the overall structure. At the same time, it reminds the user to repair and restore the original position in time. When the displacement warning value Fc < the displacement warning value threshold Qz, an alarm is triggered to remind the user to carry out timely maintenance.

[0048] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of this template.

[0049] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A self-balancing prestressed fish-belly beam support device, characterized in that: The structure includes a waist beam (1), with multiple web members (2) spaced apart in the middle of the waist beam (1). Triangular beams (6) are fixedly connected to both ends of the waist beam (1). Multiple strands of steel strands (11) are arranged together between the multiple web members (2) and the triangular beams (6). A multi-hole anchor (7) is provided at the triangular beam (6) for anchoring the corresponding ends of the multi-strand steel strands (11). A through-hole jack (9) is provided on the outside of the multi-hole anchor (7). The through-hole jack (9) is used to pull the multi-strand steel strands (11) outward. A monitoring and adjustment device (14) is provided at the triangular beam (6) for monitoring the displacement of the multi-strand steel strands (11). The monitoring and adjustment device (14) is used to generate a control command to control the action of the through-hole jack (9) when the displacement of the multi-strand steel strands (11) is abnormal. The multi-strand steel strand (11) is fixedly positioned between the through-hole jack (9) and the multi-hole anchor (7) with a positioning ring (13). The monitoring and adjustment device (14) includes a displacement sensor located at the triangular beam (6). The displacement sensor is used to monitor the displacement of the positioning ring (13). The monitoring and adjustment device (14) also has a processing module and an output module. The processing module is used to generate a displacement warning value Fc based on the displacement signal collected by the displacement sensor. The output module is used to generate an output signal when the displacement warning value Fc exceeds the set displacement warning value threshold Qz. The output signal includes a control command for controlling the action of the through-hole jack (9) and an alarm command for controlling the action of an alarm module. The displacement sensor is used to continuously collect the displacement of the positioning ring (13); the processing module is used to obtain the displacement warning value Fc based on the number of times Pe and the average interval Wa of the displacement signal abnormality within a set time T. ； ； Where c1 and c2 are set proportional coefficients; To set the compensation coefficient; This is the time interval between the i-th displacement signal anomaly within a set time period T and the previous anomaly.

2. A self-balancing prestressed fish-belly beam support device according to claim 1, characterized in that: A connecting frame (601) is fixedly connected inside the triangular beam (6). The connecting frame (601) is set perpendicular to the waist beam (1). A multi-hole anchor (7) is fixedly connected to the connecting frame (601). A tensioning plate (602) for multiple strands of steel wire (11) to pass through is provided on the side of the triangular beam (6) near the web member (2). Multiple through holes are provided on the tensioning plate (602) arranged in an equidistant circle.

3. A self-balancing prestressed fish-belly beam support device according to claim 1, characterized in that: The multi-strand steel strand (11) is provided with a gathering mechanism (8) between the through-hole jack (9) and the multi-hole anchor (7). The gathering mechanism (8) tends to keep the corresponding part of the multi-strand steel strand (11) away from the multi-hole anchor (7).

4. A self-balancing prestressed fish-belly beam support device according to claim 3, characterized in that: The converging mechanism (8) includes a fixing ring (801) and an anchor core (807). The fixing ring (801) is fixedly connected to the connecting frame (601). A constraint ring is snapped onto the side of the fixing ring (801) near the multi-hole anchor (7). A tapered sleeve (803) is fixedly connected to the other side of the fixing ring (801). An extension tube (804) is fixedly connected to the side of the tapered sleeve (803) away from the fixing ring (801). A sleeve is slidably installed on the extension tube (804). 805), a second inner conical groove (8052) is provided on the inner wall of the sleeve (805) near the conical sleeve (803), and a first inner conical groove (8051) is provided on the inner wall of the other side of the sleeve (805). A spring (806) is fixedly connected between the fixing ring (801) and the sleeve (805). The spring (806) is sleeved on the conical sleeve (803) and is used to maintain the tendency of the fixing ring (801) away from the perforated anchor (7).

5. A self-balancing prestressed fish-belly beam support device according to claim 1, characterized in that: The top of each of the web members (2) is fixedly connected to a top support mechanism (5). The top support mechanism (5) includes a mounting plate (501). The mounting plate (501) is installed on the web members (2) by bolt threads. A power holding box (502) is fixedly connected to the mounting plate (501). An insertion interface (5021) is opened on the top of the power holding box (502). A top block (503) is slidably installed on the end of the power holding box (502) away from the web members (2). A support component is fixedly connected inside the top block (503). The end of the support component away from the top block (503) is fixedly connected to the inner wall of the power holding box (502).

6. A self-balancing prestressed fish-belly beam support device according to claim 5, characterized in that: The top block (503) is fixedly connected to the end away from the power box (502) with an abutment seat (505). The abutment seat (505) is provided with a through groove for the steel strand (11) to pass through. Multiple arc-shaped grooves are provided on the side of the through groove near the top block (503). Multiple safety rods (507) are fixedly connected to the inner wall of the abutment seat (505). All the safety rods (507) are located above the steel strand (11).

7. A self-balancing prestressed fish-belly beam support device according to claim 4, characterized in that: The anchor core (807) is attached to the multi-strand steel strand (11), and the anchor core (807) is attached to the inside of the first inner cone groove (8051).

8. A self-balancing prestressed fish-belly beam support device according to claim 1, characterized in that: Both sides of the web member (2) are provided with diagonal braces (3). The end of the diagonal brace (3) away from the web member (2) is fixedly connected to the waist beam (1). A connecting rod (4) is provided between adjacent web members (2).

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