Space tube truss sliding temporary support tooling

Abstract

The utility model relates to a kind of space pipe truss sliding temporary support tool, including support bracket system, jack system, limiting device and control system;The support bracket system includes two box type structure's bracket, two The bracket is respectively arranged at the both sides of truss support and is fixedly connected with the truss support;The jack system is arranged below the box type structure bracket, for driving the truss support lifting;The limiting device is installed in the both sides of the truss support, and the synchronous control system controls jack action synchronization.The utility model solves the problems of poor stability, insufficient synchronism and other problems of traditional temporary support, has the advantages of reliable structure, accurate control, wide adaptability, etc., and is suitable for large-span space pipe truss sliding construction.

Description

Technical Field

[0001] This utility model relates to the field of construction technology for large-span spatial steel structures, and in particular to a temporary support fixture for sliding spatial trusses, applicable to temporary support systems used in the construction of large-span spatial truss structures such as stadiums, airport terminals, and exhibition centers using the cumulative sliding method. It is specifically designed for temporary support devices used during the system transition process after sliding, when the truss changes from a temporary support state to its designed position. Background Technology

[0002] Spatial truss structures are widely used in large-span buildings due to their lightweight, high strength, and aesthetically pleasing design. The cumulative sliding method, which achieves efficient construction through segmented assembly and gradual sliding, has become the mainstream technology for installing large-span trusses. However, the system transformation after sliding (i.e., unloading of temporary supports and structural positioning) is a key challenge in construction, where the performance of the temporary support fixtures directly determines construction safety and accuracy.

[0003] In existing technologies, temporary supports mostly use simple support piers or general-purpose jack systems, which have the following problems: Insufficient support stability: Traditional support brackets have simple structures and lack targeted design, making them prone to deformation during unloading. For example, box-type brackets used in some projects have unreasonable cross-sectional dimensions, leading to localized stress concentration, with the maximum stress approaching the material's yield strength.

[0004] Poor synchronization control: The jack system lacks an effective synchronization mechanism, and asynchronous unloading at each support point causes redistribution of internal forces in the structure. Actual measurement data shows that in traditional methods, the differential settlement of supports can reach 5-10 mm, leading to an increase in additional stress on the truss by 15%-20%.

[0005] Low positioning accuracy: Lateral positioning measures are inadequate, and truss positioning deviations often exceed 20mm. Especially at complex nodes such as ball joint supports, the current connection method between the limiting box and the foundation makes it difficult to achieve precise control.

[0006] Limited adaptability: Fixed support fixtures are difficult to adapt to engineering needs with different spans and support conditions.

[0007] Therefore, there is an urgent need in this field for a temporary support fixture that is structurally sound, precisely controlled, and highly adaptable to address the safety and accuracy issues during the transition phase of a sliding construction system. Utility Model Content

[0008] To address the shortcomings of existing technologies, the purpose of this invention is to provide a temporary sliding support fixture for space trusses, solving problems such as poor stability, insufficient synchronization, and low limiting accuracy in existing temporary support fixtures. This new fixture offers a structurally stable, synchronously controllable, and precisely positioned temporary sliding support fixture for space trusses. By optimizing the support bracket structure, integrating a hydraulic synchronization system, and strengthening limiting measures, this fixture achieves safe and stable control during the truss unloading process.

[0009] The above-mentioned utility model objective is achieved through the following technical solution: This utility model provides a temporary sliding support fixture for a space truss, including a support bracket system, a jack system, a limiting device, and a control system. The support bracket system includes two box-shaped brackets, which are respectively arranged on both sides of the truss support and fixedly connected to the truss support. The jack system is arranged below the box-shaped brackets and is used to drive the truss support to rise and fall. The limiting device is installed on both sides of the truss support, and the synchronous control system controls the jacks to move synchronously.

[0010] According to one embodiment of the present invention, the cross-sectional dimensions of the corbel are 300mm×160mm×30mm×20mm, and the material is Q355B steel; the corbel is provided with transverse stiffening ribs and diagonal stiffening ribs inside, and the stiffening ribs are 20-25mm thick; the corbel is 500mm long and is connected to the support ball at the bottom of the truss support by bevel welding, with a weld height of 20mm.

[0011] According to one embodiment of the present invention, the jack system uses 100t screw jacks, and two jacks are symmetrically arranged at each truss support.

[0012] According to one embodiment of the present invention, the limiting device includes an A-axis side box and a Q-axis side box. The dimensions of the A-axis side box are 160mm×160mm×20mm×20mm, and the dimensions of the Q-axis side box are 260mm×160mm×20mm×20mm. The box is welded to the foundation embedded parts and filled with C40 fine stone concrete. An adjustable limiting module is provided on the side of the box, using M30 adjusting bolts, with an adjustment range of ±50mm.

[0013] According to one embodiment of the present invention, the synchronization control system includes a hydraulic synchronization unit, a sensing and detection system, and a control unit; the hydraulic synchronization unit adopts a proportional hydraulic valve with a control accuracy of ±2%; the sensing and detection system includes a displacement sensor (accuracy 0.01mm) and a pressure sensor (accuracy 0.5%); the control unit implements PID control through a PLC with a synchronization deviation setpoint of ±2mm.

[0014] According to one embodiment of the present invention, the stiffening ribs of the supporting bracket are arranged as follows: three transverse stiffening ribs are arranged at equal intervals along the length of the bracket, and 45° oblique stiffening ribs are provided at the connection between the bracket and the truss support; the stiffening ribs and the bracket wall are joined by double-sided fillet welds with a weld leg size of 12mm.

[0015] According to one embodiment of the present invention, the adjusting bolt of the adjustable limit module has an accuracy of 1mm, is equipped with a locking nut, and has a locking torque of 350N·m; the installation gap between the box and the foundation back beam is ≤2mm, and the verticality deviation of the box is ≤1 / 1000.

[0016] According to one embodiment of the present invention, the displacement sensor of the sensing and detection system has a range of 0-300mm, and the pressure sensor has a range of 0-1500kN; the data sampling frequency of the control unit is 10Hz, and it is equipped with a human-machine interface to display real-time curves and historical data.

[0017] According to one embodiment of the present invention, the tooling is optimized by finite element analysis, with a maximum working stress ≤235.9MPa and a safety factor ≥1.46; the tooling is suitable for spatial tubular trusses with spans of 70-162m and can be reused ≥5 times.

[0018] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects: High structural stability: Optimized box-type corbel cross-section and stiffening rib arrangement ensure uniform stress distribution. Finite element analysis shows a maximum stress of 235.9 MPa, far below the material's yield strength, representing a 20% reduction in stress compared to traditional structures.

[0019] Precise synchronous control: The hydraulic system, in conjunction with high-precision sensors, enables multiple jacks to move synchronously, with displacement deviation controlled within ±2mm, avoiding additional stress caused by asynchrony.

[0020] Highly adjustable limit: The adjustable limit module achieves precise adjustment of ±50mm, with a positioning deviation of ≤10mm, which improves accuracy by more than 50% compared to traditional methods.

[0021] Wide range of applications: The modular design allows for adjustment of tooling dimensions according to the truss span (70-162m), and is suitable for various support conditions such as ball joint supports and fixed supports.

[0022] Sufficient safety redundancy: The jack system is equipped with overload protection (automatic shutdown at 110% rated load), and the limit device has a 20% safety margin to ensure construction safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of the A-axis side box of this utility model.

[0025] Figure 3 This is a structural schematic diagram of the Q-axis side box of this utility model. Reference numerals: 1. Corbel; 2. Truss support; 3. Jack; 4. A-axis side box; 5. Q-axis side box; 6. Support ball. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Example 1: Reference Figures 1-3 This utility model discloses a temporary sliding support fixture for a space truss, comprising a support bracket system, a jack system, a limiting device, and a control system. The support bracket system includes two box-shaped brackets 1, which are respectively arranged on both sides of the truss support 2 and fixedly connected to the truss support 2. The jack system is arranged below the box-shaped brackets 1 and is used to drive the truss support 2 to rise and fall. The limiting device is installed on both sides of the truss support 2, and the synchronous control system controls the jacks 3 to move synchronously.

[0030] The cross-sectional dimensions of bracket 1 are 300mm × 160mm × 30mm × 20mm, and the material is Q355B steel. Bracket 1 is internally equipped with transverse and diagonal stiffening ribs, with a stiffening rib thickness of 20-25mm. Bracket 1 is 500mm long and is connected to the support ball 6 at the bottom of the truss support 2 using a bevel weld, with a weld height of 20mm. The stiffening ribs supporting bracket 1 are arranged as follows: three transverse stiffening ribs are equidistantly arranged along the length of bracket 1, and 45° diagonal stiffening ribs are provided at the connection between bracket 1 and truss support 2. The stiffening ribs are welded to the wall of bracket 1 using double-sided fillet welds, with a weld leg size of 12mm. The jack system uses 100t screw jacks 3, with two jacks 3 symmetrically arranged at each truss support 2.

[0031] The limiting device includes an A-axis side housing 4 and a Q-axis side housing 5. The dimensions of the A-axis side housing 4 are 160mm × 160mm × 20mm × 20mm, and the dimensions of the Q-axis side housing 5 are 260mm × 160mm × 20mm × 20mm. The housings are welded to the foundation embedded parts and filled with C40 fine stone concrete. An adjustable limiting module is installed on the side of the housing, using M30 adjusting bolts, with an adjustment range of ±50mm. The adjusting bolts of the adjustable limiting module have an accuracy of 1mm and are equipped with locking nuts with a locking torque of 350N·m. The installation gap between the housing and the foundation back beam is ≤2mm, and the verticality deviation of the housing is ≤1 / 1000.

[0032] The synchronization control system includes a hydraulic synchronization unit, a sensing and detection system, and a control unit. The hydraulic synchronization unit uses proportional hydraulic valves with a control accuracy of ±2%. The sensing and detection system includes a displacement sensor (accuracy 0.01mm) and a pressure sensor (accuracy 0.5%). The control unit implements PID control via a PLC, with a synchronization deviation setpoint of ±2mm. The displacement sensor range is 0-300mm, and the pressure sensor range is 0-1500kN. The control unit has a data sampling frequency of 10Hz and is equipped with a human-machine interface to display real-time curves and historical data.

[0033] The tooling was optimized through finite element analysis, with a maximum working stress of ≤235.9MPa and a safety factor of ≥1.46. The tooling is suitable for spatial tubular trusses with spans of 70-162m and can be reused ≥5 times.

[0034] In this embodiment, the supporting bracket system adopts a box-shaped bracket 1 with a cross-sectional dimension of 300mm (height) × 160mm (width) × 30mm (web thickness) × 20mm (flange thickness) and is made of Q355B steel. The bracket 1 is 500mm long, and one end of the bracket 1 is welded to the support ball 6 at the bottom of the truss support 2.

[0035] The corbel 1 is equipped with stiffening ribs: three transverse stiffening ribs (20mm thick) are arranged at equal intervals along the length of the corbel 1, and diagonal stiffening ribs (45° angle, 25mm thick) are set at the connection between the corbel 1 and the truss support 2 to improve local stiffness.

[0036] Welding requirements for bracket 1: It shall be welded to the support ball 6 using a bevel weld with a weld height of 20mm, and shall be subjected to 100% ultrasonic testing.

[0037] In this embodiment, the jack system uses 100t screw jacks 3, with two jacks 3 arranged symmetrically at each truss support 2. The rated lifting height of the jacks 3 is 300mm, and the stroke accuracy is ±0.1mm.

[0038] In this embodiment, the A-axis side housing 4 is a 160mm×160mm×20mm×20mm housing, and the Q-axis side housing 5 is a 260mm×160mm×20mm×20mm housing. The housing material is Q355B, and it is installed flush with the foundation back beam. The limiting housing is connected by welding the bottom to the foundation embedded parts using a bevel weld with a weld height of 15mm. The interior of the housing is filled with C40 fine aggregate concrete to improve compressive strength. An adjustable limiting module is provided on the side of the limiting housing using an M30 adjusting bolt (1mm accuracy) to allow for fine-tuning of the limiting position within a range of ±50mm.

[0039] In this embodiment, the hydraulic synchronization unit uses a proportional hydraulic valve to control the oil circuit, with a flow control accuracy of ±2%. The system pressure is set at 70MPa, and an accumulator is used to maintain pressure stability. In the sensing and detection system, each jack 3 is equipped with a displacement sensor (accuracy 0.01mm) and a pressure sensor (range 0-150t, accuracy 0.5%). Strain gauges (resistance 350Ω, sensitivity coefficient 2.0) are placed at key nodes. The PLC controller of the control unit processes the sensor data in real time and adjusts the hydraulic output through a PID algorithm. The human-machine interface displays the displacement and pressure curves at each point, and a synchronization deviation alarm value of ±2mm is set.

[0040] The overall structure of the tooling was optimized through finite element analysis: a model was built using ANSYS software with a mesh size of 20mm. Applied loads included the truss's self-weight (155t), wind load (0.5kN / m²), and construction live load (2.0kN / m²). Analysis showed that the maximum stress occurred at the connection between bracket 1 and the support, with a value of 235.9MPa, which is less than the yield strength of Q355B steel (345MPa), resulting in a safety factor of 1.46.

[0041] The installation process of this utility model is as follows: Foundation acceptance: Check the position deviation of the embedded parts (≤5mm) and the surface flatness (≤2mm / m); Bracket 1 installation: Use a total station for positioning, and the deviation between the center line of bracket 1 and the center line of the support is ≤3mm. After welding, check the weld quality; Jack 3 positioning: The bottom verticality deviation is ≤1 / 500; Limiting device installation: The gap between the limiting box and the foundation is ≤2mm, and concrete is filled after welding; System debugging: Conduct a no-load test run and check the synchronization performance. Load 50% load test, and control the synchronization deviation within ±1mm.

[0042] Performance: During unloading, the maximum synchronous deviation was 1.5mm, far below the allowable value of ±2mm. After the truss was in place, the maximum deviation of the support center was 8mm, meeting the requirement of ≤10mm. Stress monitoring showed a maximum compressive stress of 238MPa, less than the design value of 295MPa. After the tooling was reused 3 times, the deformation of bracket 1 was <0.5mm, meeting the durability requirements.

[0043] The implementation principle of this utility model is as follows: This utility model discloses a temporary sliding support fixture for a spatial tubular truss, relating to the field of steel structure construction equipment. The fixture includes a support bracket system, a jack system, a limiting device, and a synchronous control system. The support bracket 1 adopts an optimized box-shaped cross-section with internal stiffening ribs; the limiting device includes an adjustable module for precise positioning; the synchronous control system ensures synchronized movement through sensors and PLC control. This utility model solves the problems of poor stability and insufficient synchronization in traditional temporary supports, and has advantages such as reliable structure, precise control, and wide adaptability, making it suitable for the sliding construction of large-span spatial tubular trusses.

[0044] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A temporary sliding support fixture for a spatial tubular truss, characterized in that, The system includes a support bracket system, a jack system, a limiting device, and a control system. The support bracket system includes two box-shaped brackets (1), which are respectively located on both sides of the truss support (2) and fixedly connected to the truss support (2). The jack system is arranged below the box-shaped brackets (1) and is used to drive the truss support (2) to rise and fall. The limiting device is installed on both sides of the truss support (2), and the control system controls the jacks (3) to move synchronously.

2. The temporary sliding support fixture for a spatial tubular truss according to claim 1, characterized in that, The cross-sectional dimensions of the bracket (1) are 300mm×160mm×30mm×20mm, and the material is Q355B steel. The bracket (1) is provided with transverse stiffening ribs and diagonal stiffening ribs inside, and the stiffening ribs are 20-25mm thick. The bracket (1) is 500mm long and is connected to the support ball (6) at the bottom of the truss support (2) by bevel welding, with a weld height of 20mm.

3. The temporary sliding support fixture for a space truss according to claim 1, characterized in that, The jack system uses 100t screw jacks (3), and two jacks (3) are symmetrically arranged at each truss support (2).

4. The temporary sliding support fixture for a space truss according to claim 1, characterized in that, The limiting device includes an A-axis side box (4) and a Q-axis side box (5). The dimensions of the A-axis side box (4) are 160mm×160mm×20mm×20mm, and the dimensions of the Q-axis side box (5) are 260mm×160mm×20mm×20mm. The box is welded to the foundation embedded parts and filled with C40 fine stone concrete. An adjustable limiting module is set on the side of the box, using M30 adjusting bolts, with an adjustment range of ±50mm.

5. The temporary sliding support fixture for a space truss according to claim 1, characterized in that, The control system includes a hydraulic synchronization unit, a sensing and detection system, and a control unit; the hydraulic synchronization unit uses a proportional hydraulic valve with a control accuracy of ±2%; the sensing and detection system includes a displacement sensor and a pressure sensor; the control unit implements PID control via a PLC with a synchronization deviation setpoint of ±2mm.

6. The temporary sliding support fixture for a space truss according to claim 2, characterized in that, The stiffening ribs of the supporting bracket (1) are arranged as follows: three transverse stiffening ribs are arranged at equal intervals along the length of the bracket (1), and 45° oblique stiffening ribs are set at the connection between the bracket (1) and the truss support (2); the stiffening ribs and the wall of the bracket (1) are welded together with double-sided fillet welds with a weld leg size of 12mm.

7. The temporary sliding support fixture for a space truss according to claim 4, characterized in that, The adjustable limit module has an adjustment bolt accuracy of 1mm and is equipped with a locking nut with a locking torque of 350N·m; the installation gap between the box and the foundation back beam is ≤2mm, and the verticality deviation of the box is ≤1 / 1000.

8. The temporary sliding support fixture for a space truss according to claim 5, characterized in that, The displacement sensor of the sensing and detection system has a range of 0-300mm, and the pressure sensor has a range of 0-1500kN; the control unit has a data sampling frequency of 10Hz and is equipped with a human-machine interface to display real-time curves and historical data.

9. The temporary sliding support fixture for a space truss according to claim 1, characterized in that, The tooling was optimized through finite element analysis, with a maximum working stress of ≤235.9MPa and a safety factor of ≥1.

46. The tooling is suitable for spatial tubular trusses with spans of 70-162m and can be reused ≥5 times.

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