Modular pipe rack steel structure and method of assembly thereof

Abstract

The present application relates to the technical field of pipe gallery steel structure, and more particularly to a modular pipe gallery steel structure and an assembling method thereof.The modular pipe gallery steel structure comprises end mounting racks, T-shaped support racks, cross beams, connecting assemblies, trapezoidal blocks and fixing assemblies.The end mounting racks are symmetrically arranged, and the T-shaped support racks are symmetrically arranged at equal intervals between the end mounting racks.The horizontal sections of the top portions of the T-shaped support racks are sequentially connected end to end, and the cross beams are mounted on the top portions of the T-shaped support racks.The modular pipe gallery steel structure provided by the present application significantly improves the on-site assembling efficiency, greatly reduces the construction cost and operation threshold, and rigidly fixes the longitudinal nodes by only inserting and screwing fastening bolts from the top portions.The top cross beams adopt a plug-in type elastic self-locking structure, and can automatically complete clamping and locking by hoisting and lowering, without on-site welding operation throughout.

Description

Technical Field

[0001] This invention relates to the field of steel structure technology for utility tunnels, and in particular to a modular steel structure for utility tunnels and its assembly method. Background Technology

[0002] With the rapid development of urban infrastructure and industrial park construction, integrated utility tunnels, as crucial infrastructure for the centralized laying of power, communication, water supply, and drainage pipelines, are seeing their application scale continuously expand. Steel structure utility tunnels, due to their advantages such as light weight, high factory prefabrication precision, short construction cycle, and strong site adaptability, are increasingly widely used in utility tunnel projects. To further improve construction efficiency and reduce on-site work, a modular disassembly + on-site assembly design mode is gradually becoming the mainstream development direction for steel structure utility tunnels: the main body of the utility tunnel is disassembled into standardized prefabricated units, which are prefabricated in the factory and then transported to the site for assembly, thereby reducing on-site construction difficulty and improving the standardization level of the project.

[0003] In existing technologies, the on-site assembly of modular utility tunnel steel structures mostly relies on welding as the primary fixing method: after adjacent longitudinal support components are in place, they are spliced ​​and fixed on-site through welding; the connection between the top beam and the support components also depends on welding, or a large number of loose bolts are used to assemble and tighten them one by one. In practical engineering applications, this assembly method has obvious technical defects: First, welding operations require certified professional welders, as well as supporting welding equipment and protective facilities. Some high-level nodes also require the construction of temporary working platforms. The construction process is complicated, the overall assembly process is time-consuming and labor-intensive, the construction cycle is long, it is difficult to meet the engineering needs of rapid construction, and the labor and equipment investment costs are high. Second, welding is a permanent and non-removable connection. When the utility tunnel needs to be expanded, renovated, partially replaced, or completely relocated and demolished, the original connection nodes must be destroyed by cutting. This not only makes the construction operation difficult and poses high safety risks, but also causes irreversible damage to the prefabricated components, making the components unusable and significantly increasing the operation, maintenance and renovation costs.

[0004] Therefore, it is necessary to provide a new modular steel structure for utility tunnels and its assembly method to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a modular steel structure for utility tunnels and its assembly method.

[0006] The modular pipe gallery steel structure provided by this invention includes: end mounting frames, T-shaped support frames, crossbeams, connecting components, trapezoidal blocks, and fixing components. The end mounting frames are symmetrically arranged, and T-shaped support frames are symmetrically arranged at equal intervals between the end mounting frames. The horizontal segments at the top of the T-shaped support frames are connected end to end in sequence. A crossbeam is installed on the top of each T-shaped support frame, and connecting components are installed at both ends of the crossbeams and the corresponding T-shaped support frames. The connecting components are used to fix the crossbeams to the top of the T-shaped support frames. A trapezoidal block is provided on the top of one side of each T-shaped support frame for unlocking the connection between the crossbeams and the T-shaped support frames. Fixing components are installed between the T-shaped support frames and the end mounting frames, and the fixing components are used to fix the top horizontal segments of the T-shaped support frames to the end mounting frames.

[0007] Preferably, the connecting components include: a locking plate, a locking block, a spring, and a locking slot. The bottom of both ends of the crossbeam are fixedly connected to the locking plate. The top center of the T-shaped support frame is provided with a slot. The locking plates are inserted into the corresponding slots. The top of the T-shaped support frame is symmetrically provided with two sets of mounting slots. The opposite ends of the mounting slots are connected to the slots. The inner walls of the mounting slots are fixedly connected to the springs. The other ends of the springs are fixedly connected to the locking blocks. The two sides of the locking plate are provided with locking slots corresponding to the locking blocks. The other ends of the locking blocks are engaged with the corresponding locking slots.

[0008] Preferably, the T-shaped support frame has a groove corresponding to the block on the side near the trapezoidal block. The side wall of the block is fixedly connected with a protruding rod, and the other end of the protruding rod passes through the corresponding groove. The ends of the two protruding rods on the same side are fixedly connected to a connecting block. The middle of the side wall of the connecting block is fixedly connected with a driving rod, and the driving rod is located above the corresponding trapezoidal block.

[0009] Preferably, each T-shaped support frame has a mounting box fixedly connected to the side near the trapezoidal block. Each mounting box has a mounting cylinder fixedly connected to its top, and the bottom end of each mounting cylinder is connected to the corresponding mounting box. Each mounting box has a lead screw rotatably connected inside, with the top end of the lead screw extending into the interior of the mounting cylinder. The outer wall of the lead screw is threadedly connected to a threaded sleeve, and the top end of each threaded sleeve is fixedly connected to a sliding rod. The top end of each sliding rod passes through the corresponding mounting cylinder and is slidably connected to the inner wall of the mounting cylinder. The top end of each sliding rod is fixedly connected to the corresponding trapezoidal block.

[0010] Preferably, a worm gear is fixedly sleeved on the outer wall of the bottom end of the lead screw, and a worm is rotatably connected inside the mounting box, and the worm meshes with the corresponding worm gear. The other end of the worm extends out of the corresponding mounting box and is fixedly connected to a hexagonal rotating rod.

[0011] Preferably, a storage groove is provided inside one end of the horizontal section of the T-shaped support frame and the right end of the mounting bracket near the T-shaped support frame. A connecting groove that mates with the storage groove is provided inside the other end of the horizontal section of the T-shaped support frame and the left end of the mounting bracket near the T-shaped support frame. A connecting plate is rotatably connected inside the storage groove.

[0012] Preferably, two sets of mounting tubes are fixedly connected to the bottom of the T-shaped support near the connecting groove and the bottom of the left end mounting bracket. Bolt holes corresponding to the mounting tubes are opened at the bottom of the T-shaped support near the connecting groove and the left end mounting bracket. Through holes corresponding to the mounting tubes are opened inside the connecting plate.

[0013] Preferably, the fixing components include: fastening bolts, nuts, and tension springs. Tension springs are fixedly connected to the inner wall of the bottom end of the mounting tube, and nuts are fixedly connected to the top of the tension springs. Fastening bolts are inserted into the bolt holes, and the fastening bolts are threadedly connected to the corresponding nuts.

[0014] Preferably, the inner wall of the installation tube is symmetrically provided with limit grooves, the side wall of the nut is symmetrically fixedly connected with limit rods, and the limit rods are slidably embedded in the corresponding limit grooves.

[0015] An assembly method for a modular pipe gallery steel structure includes the following steps: S1. Clean the top surface of the pipe gallery foundation and mark the positioning axis and elevation control points of each support component; hoist the two sets of end mounting frames to the design positions at both ends of the pipe gallery, temporarily fix and calibrate the verticality and elevation; hoist several T-shaped support frames in sequence at the design spacing on the longitudinal axis between the two end mounting frames, ensuring that the T-shaped support frames on the left and right sides are aligned one by one. S2. Flip the connecting plates in the storage slots of each T-shaped support frame in sequence and insert them into the connecting slots of the adjacent left T-shaped support frame to complete the initial longitudinal alignment of the adjacent T-shaped support frames; then flip the connecting plates in the storage slots of the right end mounting frame and insert them into the connecting slots of the last T-shaped support frame, and at the same time insert the connecting plates of the first T-shaped support frame into the connecting slots of the left end mounting frame to complete the initial longitudinal assembly of the left and right support frames. S3. Insert the fastening bolt vertically downward from the bolt hole at the top of the component. After the bolt end passes through the through hole inside the connecting plate and enters the installation pipe, it contacts the nut inside. Tighten the fastening bolt. During the screwing process, the nut slides downward along the limiting groove and stretches the tension spring until the fastening bolt is tightened, thus completing the fastening of a single set of longitudinal connection nodes. Complete the fastening operation of all longitudinal connection nodes in sequence to achieve the overall rigid fixation of the pipe gallery steel structure. S4. Hoist the crossbeam to the top of the two symmetrical T-shaped support frames, align the bottom plates at both ends of the crossbeam with the slots at the top of the T-shaped support frames, and insert them vertically downwards. During insertion, the plates press against the guide ramps of the side blocks, causing the blocks to retract into the mounting grooves and compress the springs. When the plates are fully inserted into the slots, the slots on both sides of the plates align with the positions of the blocks, and the springs rebound, pushing the blocks into the slots, automatically completing the lateral connection and fixation of the crossbeam and the T-shaped support frames. Follow this process to complete the installation of all crossbeams. S5. Check the overall axial deviation, elevation, verticality and node connection reliability of the pipe gallery. After confirming that all parameters meet the design requirements, the assembly is completed.

[0016] Compared with related technologies, the modular pipe gallery steel structure and its assembly method provided by the present invention have the following advantages: The design of connecting and fixing components significantly improves on-site assembly efficiency, greatly reduces construction costs and operational barriers. Longitudinal nodes only require inserting and tightening bolts from the top for rigid fixation. The top crossbeam adopts a plug-in elastic self-locking structure, automatically locking during hoisting and lowering, eliminating the need for on-site welding. The overall assembly process is simple and easy to operate, significantly shortening the on-site construction cycle, reducing labor and equipment costs, and fully meeting the engineering requirements for rapid pipe gallery construction.

[0017] The entire structure adopts a detachable connection design. Longitudinal splicing nodes can be released from constraints by unscrewing the fastening bolts, and transverse beams can be unlocked from their locked state via a side worm gear drive mechanism. The disassembly process requires no cutting operations and will not cause irreversible damage to prefabricated components. All components can be completely recycled and reused. When the utility tunnel needs to be expanded, renovated, partially replaced, or relocated, it can be quickly disassembled and reassembled, significantly reducing operation, maintenance, renovation, and relocation costs, reducing material waste, improving resource utilization, and possessing good economic and environmental benefits.

[0018] The longitudinal connection adopts a constraint structure of "connecting plate fitting and pre-positioning + bolt rigid fastening". The connecting plate can limit the lateral offset and vertical displacement of adjacent components. Combined with the axial pre-tightening force of the fastening bolts, it ensures the integrity and force transmission continuity of the longitudinal frame. The fixing component has a built-in tension spring structure, which continuously provides a constant anti-loosening tension to the threaded pair after fastening, effectively offsetting the vibration load during the operation of the pipe gallery, preventing bolt loosening, and ensuring the long-term reliability of the joint fastening. The transverse beam adopts a double-sided spring snap-locking structure. The snap block and the snap slot are planar fit and limit, which can effectively resist vertical pull-out force and prevent the beam from coming off when subjected to load vibration. The spring continuously provides clamping force to ensure a stable and reliable snap-locking state. The overall structure has excellent load-bearing capacity and vibration resistance, which can fully ensure the safety of the steel structure of the pipe gallery. Attached Figure Description

[0019] Figure 1 A schematic diagram of the modular pipe gallery steel structure and its assembly method provided by the present invention; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the top center of the T-shaped support frame. Figure 3 for Figure 2 The diagram shows the structure at point A. Figure 4 for Figure 2 The diagram shows the structure at point B. Figure 5 for Figure 2 A schematic diagram of the cross-section of the top end of the T-shaped support frame shown; Figure 6 for Figure 5 The diagram shows the structure at point C. Figure 7 for Figure 5 The diagram shows a separate structure of the crossbeam and the T-shaped support frame. Figure 8 for Figure 7 The diagram shows the structure at point D.

[0020] The following are the labeling elements in the diagram: 1. End mounting bracket; 2. T-shaped support bracket; 3. Crossbeam; 4. Trapezoidal block; 5. Clamping plate; 6. Clamping block; 7. Spring; 8. Clamping groove; 9. Slot; 10. Connecting block; 11. Drive rod; 12. Mounting box; 13. Mounting cylinder; 14. Lead screw; 15. Threaded sleeve; 16. Slide rod; 17. Worm gear; 18. Worm; 19. Hexagonal rotating rod; 20. Storage groove; 21. Connecting groove; 22. Connecting plate; 23. Mounting tube; 24. Fastening bolt; 25. Nut; 26. Tension spring; 27. Limiting groove; 28. Limiting rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] The specific implementation of the present invention will be described in detail below with reference to specific embodiments. Example

[0023] Please see Figures 1 to 8A modular pipe gallery steel structure and its assembly method are disclosed. The modular pipe gallery steel structure and its assembly method include: end mounting frames 1, T-shaped support frames 2, crossbeams 3, connecting components, trapezoidal blocks 4, and fixing components. The end mounting frames 1 are symmetrically arranged, and T-shaped support frames 2 are symmetrically arranged at equal intervals between the end mounting frames 1. The horizontal segments at the top of the T-shaped support frames 2 are connected end to end in sequence. A crossbeam 3 is installed on the top of each T-shaped support frame 2. Connecting components are installed between the two ends of the crossbeam 3 and the corresponding T-shaped support frame 2. The connecting components are used to fix the crossbeam 3 to the top of the T-shaped support frame 2. A trapezoidal block 4 is provided on the top of one side of each T-shaped support frame 2 for unlocking the fixation between the crossbeam 3 and the T-shaped support frame 2. Fixing components are installed between the T-shaped support frame 2 and the end mounting frames 1. The fixing components are used to fix the top horizontal segments of the T-shaped support frame 2 together with the end mounting frames 1. A rectangular mounting base plate is welded and fixed to the bottom of both the end mounting frames 1 and the T-shaped support frames 2. Anchor bolt holes are opened at the four corners of the base plate. After the components are in place and their verticality and elevation are calibrated, the anchor bolts pre-embedded in the foundation are inserted into the bolt holes of the base plate and tightened with nuts 25 to permanently fix the supporting components to the pipe gallery foundation.

[0024] The connecting components include: a locking plate 5, a locking block 6, a spring 7, and a locking groove 8. The bottom ends of both ends of the crossbeam 3 are fixedly connected to the locking plate 5. The top center of the T-shaped support frame 2 is provided with a slot 9. The locking plate 5 is inserted into the corresponding slot 9. The top of the T-shaped support frame 2 is symmetrically provided with two sets of mounting slots, and the opposite ends of the mounting slots are connected to the slot 9. The inner wall of the mounting slot is fixedly connected to the spring 7. The other end of the spring 7 is fixedly connected to the locking block 6. The two sides of the locking plate 5 are provided with locking grooves 8 corresponding to the locking block 6, and the other end of the locking block 6 is engaged with the corresponding locking groove 8. The upper part of the end of the locking block 6 facing the slot 9 is provided with a guide slope and the lower part is a horizontal engaging plane. The locking groove 8 is a groove adapted to the end of the locking block 6.

[0025] The T-shaped support frame 2 has a groove corresponding to the locking block 6 on the side near the trapezoidal block 4. The side wall of the locking block 6 is fixedly connected with a protruding rod, and the other end of the protruding rod passes through the corresponding groove. The ends of the two protruding rods on the same side are fixedly connected to a connecting block 10. The middle of the side wall of the connecting block 10 is fixedly connected with a driving rod 11, and the driving rod 11 is located above the corresponding trapezoidal block 4.

[0026] Mounting boxes 12 are fixedly connected to the side of the T-shaped support frame 2 near the trapezoidal block 4. Mounting cylinders 13 are fixedly connected to the top of the mounting boxes 12, and the bottom of the mounting cylinders 13 are connected to the corresponding mounting boxes 12. A lead screw 14 is rotatably connected inside the mounting boxes 12. The top end of the lead screw 14 extends into the interior of the mounting cylinder 13. A threaded sleeve 15 is threadedly connected to the outer wall of the lead screw 14. A sliding rod 16 is fixedly connected to the top end of the threaded sleeve 15. The top end of the sliding rod 16 passes through the corresponding mounting cylinder 13 and is slidably connected to the inner wall of the mounting cylinder 13. The top end of the sliding rod 16 is fixedly connected to the corresponding trapezoidal block 4. An axial guide rib is provided on the inner wall of the mounting cylinder 13, and an axial guide groove is correspondingly opened on the outer wall of the sliding rod 16. The guide rib is embedded in the guide groove. The above structure restricts the circumferential rotational freedom of the sliding rod 16, allowing the sliding rod 16 to slide axially along the mounting cylinder 13, ensuring that the threaded sleeve 15 and the sliding rod 16 can stably achieve vertical lifting and lowering movement when the lead screw 14 rotates.

[0027] The bottom outer wall of the lead screw 14 is fixedly fitted with a worm gear 17. The inside of the mounting box 12 is rotatably connected with a worm 18, and the worm 18 meshes with the corresponding worm gear 17. The other end of the worm 18 extends out of the corresponding mounting box 12 and is fixedly connected with a hexagonal rotating rod 19. Example

[0028] Please see Figure 5 and Figure 6 The T-shaped support frame 2 has a storage slot 20 inside one end of the horizontal section and the right end of the mounting bracket 1 near the T-shaped support frame 2. The other end of the T-shaped support frame 2 and the left end of the mounting bracket 1 near the T-shaped support frame 2 have a connecting slot 21 that mates with the storage slot 20. The storage slot 20 is rotatably connected to a connecting plate 22. A hinge shaft is provided at the upper part of the storage slot 20 near the slot opening. One end of the connecting plate 22 is hinged to the shaft.

[0029] Two sets of mounting tubes 23 are fixedly connected to the bottom of the T-shaped support frame 2 near the connecting groove 21 and the bottom of the left end mounting bracket 1. The T-shaped support frame 2 near the connecting groove 21 and the left end mounting bracket 1 are provided with bolt holes corresponding to the mounting tubes 23. The inside of the connecting plate 22 is provided with through holes corresponding to the mounting tubes 23.

[0030] The fixing components include: fastening bolts 24, nuts 25 and tension springs 26. Tension springs 26 are fixedly connected to the inner wall of the bottom end of the mounting tube 23, and nuts 25 are fixedly connected to the top of each tension spring 26. Fastening bolts 24 are inserted into the bolt holes, and each fastening bolt 24 is threadedly connected to the corresponding nut 25.

[0031] The inner wall of the mounting tube 23 is symmetrically provided with limiting grooves 27, and the side wall of the nut 25 is symmetrically fixedly connected with limiting rods 28, and the limiting rods 28 are slidably embedded in the corresponding limiting grooves 27.

[0032] An assembly method for a modular pipe gallery steel structure includes the following steps: S1. Clean the top surface of the pipe gallery foundation and mark the positioning axis and elevation control points of each support component; hoist the two sets of end mounting frames 1 to the design positions at both ends of the pipe gallery, temporarily fix and calibrate the verticality and elevation; hoist several T-shaped support frames 2 at the design intervals in sequence on the longitudinal axis between the two end mounting frames 1 to ensure that the T-shaped support frames 2 on the left and right sides are aligned one by one. S2. Flip the connecting plates 22 in the horizontal section storage slots 20 of each T-shaped support frame 2 in sequence and insert them into the connecting slots 21 of the adjacent left T-shaped support frame 2 to complete the initial longitudinal alignment of the adjacent T-shaped support frames 2; then flip the connecting plates 22 in the storage slots 20 of the right end mounting frame 1 and insert them into the connecting slots 21 of the last T-shaped support frame 2, and at the same time insert the connecting plates 22 of the first T-shaped support frame 2 into the connecting slots 21 of the left end mounting frame 1 to complete the initial longitudinal assembly of the left and right columns of support frames; S3. Insert the fastening bolt 24 vertically downward from the bolt hole at the top of the component. The end of the bolt passes through the through hole inside the connecting plate 22 and enters the installation pipe 23, where it contacts the nut 25 inside. Tighten the fastening bolt 24. During the screwing process, the nut 25 slides downward along the limiting groove 27 and stretches the tension spring 26 until the fastening bolt 24 is tightened, completing the fastening of a single set of longitudinal connection nodes. Complete the fastening operation of all longitudinal connection nodes in sequence to achieve the overall rigid fixation of the pipe gallery steel structure. S4. Hoist the crossbeam 3 to the top of the two symmetrical T-shaped support frames 2, align the bottom plates 5 at both ends of the crossbeam 3 with the slots 9 at the top of the T-shaped support frame 2 and insert them vertically downwards; during the insertion process, the plates 5 press against the guide slopes of the side blocks 6, causing the blocks 6 to retract into the mounting groove and compress the spring 7. When the plates 5 are fully inserted into the slots 9, the slots 8 on both sides of the plates 5 are aligned with the positions of the blocks 6, and the springs 7 rebound to push the blocks 6 into the slots 8, automatically completing the lateral snap-fit ​​fixing of the crossbeam 3 and the T-shaped support frame 2; follow this process to complete the installation of all crossbeams 3. S5. Check the overall axial deviation, elevation, verticality and node connection reliability of the pipe gallery. After confirming that all parameters meet the design requirements, the assembly is completed.

[0033] The working principle of the modular pipe gallery steel structure and its assembly method provided by this invention is as follows: First, the foundation points are marked out and the end mounting frames 1 are fixed. After cleaning the top surface of the pipe gallery foundation, the longitudinal center line, the positioning axes of each supporting component, and the elevation control points are marked out according to the design drawings to determine the precise positioning positions of the end mounting frames 1 at both ends and the T-shaped support frames 2 in the middle. The two sets of end mounting frames 1 are hoisted to the design points at both ends of the pipe gallery in the longitudinal direction, and temporary fixing is completed with temporary supports. At the same time, the verticality of the components and the top surface elevation are calibrated. After confirming that there are no errors, the end reference frames are fixed to provide positioning references at both ends for the longitudinal assembly of the entire pipe gallery.

[0034] After completing the end reference positioning, the T-shaped support frame 2 in the middle is hoisted into place in sequence. According to the design spacing, multiple sets of T-shaped support frames 2 are hoisted one by one onto the longitudinal axis between the two end mounting frames 1. The positions are adjusted so that the T-shaped support frames 2 on the left and right sides are aligned and fixed to ensure lateral coaxiality. This provides precise alignment conditions for the subsequent installation of the top crossbeam 3. At this time, each T-shaped support frame 2 is arranged at equal intervals along the longitudinal direction of the pipe gallery, and together with the end mounting frames 1 at both ends, they form the basic unit of the longitudinal support frame.

[0035] Subsequently, preliminary splicing and alignment of the longitudinal support units are carried out. Starting from one end of the pipe gallery, the connecting plates 22 in the receiving slots 20 of each T-shaped support frame 2 are flipped in sequence, and the connecting plates 22 that have rotated around the hinge axis are horizontally inserted into the connecting slots 21 of the adjacent left-side T-shaped support frame 2. Similarly, the connecting plates 22 in the receiving slots 20 of the right-side mounting frame 1 are flipped and inserted into the connecting slots 21 of the last T-shaped support frame 2, while the connecting plates 22 of the first T-shaped support frame 2 are inserted into the connecting slots 21 of the left-side mounting frame 1. After the connecting plates 22 are embedded in the connecting slots 21, the entire row of support components forms a preliminary coherent longitudinal frame, providing a precise alignment basis for subsequent fastening operations.

[0036] After initial alignment, all longitudinal splicing nodes are rigidly tightened. The fastening bolts 24 are inserted vertically downwards from the bolt holes at the top of the component. The bolt shank passes through the corresponding through-hole on the connecting plate 22 and enters the bottom mounting tube 23, contacting the end face of the pre-placed nut 25 inside the tube. When tightening the fastening bolts 24, because the limiting rods 28 on both sides of the nut 25 are engaged in the limiting grooves 27 on the inner wall of the mounting tube 23, the nut 25 cannot rotate circumferentially with the bolt. The rotational movement of the bolt is converted into the downward sliding of the nut 25 along the axial direction of the mounting tube 23. At the same time, the nut 25 continuously stretches the tension spring 26 at the bottom. As the bolts are continuously screwed in, the bolt preload locks the splicing nodes of adjacent components, achieving overall rigid fixation of the longitudinal support frame. During this process, the tension spring 26 continuously provides rebound tension after tightening, applying a constant anti-loosening tension to the threaded pair, which can reduce the risk of bolt loosening when the pipe gallery is subjected to vibration loads.

[0037] After the longitudinal frame is fixed, the top crossbeam 3 is installed and fixed. The crossbeam 3 is horizontally hoisted to the top of the two symmetrical T-shaped support frames 2. The position is adjusted so that the locking plates 5 at the bottom of both ends of the crossbeam 3 are aligned with the slots 9 at the top of the lower T-shaped support frame 2. Then, the crossbeam 3 is lowered vertically. After the locking plates 5 enter the slots 9, their lower edges contact the guide slopes of the locking blocks 6 on both sides of the slots 9. As the crossbeam 3 continues to fall, the vertical pressure of the locking plates 5 on the slopes is decomposed into a lateral component, pushing the locking blocks 6 on both sides to retract into the mounting grooves inside, while compressing the springs 7 on the back of the locking blocks 6. When the bottom surface of the crossbeam 3 is completely in contact with the top surface of the T-shaped support frame 2, the locking plates 5 are fully inserted into the bottom of the slots 9. At this time, the locking slots 8 on both sides of the locking plates 5 are precisely aligned with the locking blocks 6. After the locking blocks 6 lose their squeezing force, they extend towards the slots 9 under the rebound action of the springs 7 and automatically lock into the locking slots 8 of the locking plates 5, completing the lateral locking and locking of the crossbeam 3 and the T-shaped support frame 2. After the snap-fit ​​is completed, the top surface of the snap-fit ​​block 6 and the top surface of the snap-fit ​​groove 8 are in planar contact, which can effectively limit the vertical upward displacement of the crossbeam 3 and prevent the crossbeam 3 from coming off upward when subjected to load or vibration. The constraint can only be released by the lateral unlocking mechanism, ensuring the structural reliability of the lateral connection.

[0038] After all components are installed, the overall axial deviation, elevation, verticality, and connection reliability of each node of the utility tunnel are checked. Once all parameters are confirmed to meet the design requirements, the entire modular utility tunnel steel structure is assembled.

[0039] When disassembly, maintenance, or overall relocation is required, the locking constraint of the crossbeam 3 can be released via the lateral unlocking mechanism: Using a tool, rotate the hexagonal rotating rod 19 on the side of the T-shaped support frame 2, causing the coaxial worm gear 18 to rotate synchronously. Through the meshing transmission between the worm gear 18 and the worm wheel 17, the horizontal rotation is converted into a vertical rotation, causing the coaxially fixed lead screw 14 to rotate synchronously. Because the threaded sleeve 15 on the outer wall of the lead screw 14 is fixed to the slide rod 16, the slide rod 16 is restricted from circumferential rotation by the inner wall of the mounting cylinder 13. Therefore, the rotation of the lead screw 14 is converted into a vertical upward linear movement of the threaded sleeve 15 and the slide rod 16, pushing the top trapezoidal block 4 upward. The inclined surface of trapezoidal block 4 contacts the bottom surface of the upper drive rod 11. As trapezoidal block 4 continues to rise, the inclined surface pushes the drive rod 11 horizontally away from the slot 9. This, in turn, drives the two locking blocks 6 on both sides of the slot 9 to retract outward and compress the spring 7 through the connecting block 10 and the protruding rod, until the locking blocks 6 are completely removed from the slot 8. At this point, the locking constraint between the crossbeam 3 and the T-shaped support frame 2 is released, and the crossbeam 3 can be lifted and removed. Relying on the reverse self-locking characteristic of the worm gear 17 and worm 18 transmission, no continuous rotational force is required during the unlocking process. The mechanism can stably maintain the unlocked state, facilitating the disassembly operation.

[0040] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A modular steel structure for a utility tunnel, characterized in that, include: End mounting brackets (1) are arranged symmetrically; T-shaped support frame (2), T-shaped support frame (2) is symmetrically provided at equal intervals between the end mounting frames (1); and the horizontal segments at the top of the T-shaped support frame (2) are connected end to end in sequence; The top of the crossbeam (3) and the T-shaped support frame (2) are both equipped with crossbeams (3); The connecting components are installed between the two ends of the crossbeam (3) and the corresponding T-shaped support frame (2). The connecting components are used to fix the crossbeam (3) to the top of the T-shaped support frame (2). The trapezoidal block (4) and the top of one side of the T-shaped support frame (2) are both provided with trapezoidal blocks (4) for unlocking the crossbeam (3) and fixing the T-shaped support frame (2). Fixing components are installed between the T-shaped support frame (2) and the end mounting frame (1). The fixing components are used to fix the top horizontal section of the T-shaped support frame (2) to the end mounting frame (1).

2. The modular pipe gallery steel structure according to claim 1, characterized in that, The connecting components include: a card plate (5), a card block (6), a spring (7), and a card slot (8). The bottom of both ends of the crossbeam (3) are fixedly connected to the card plate (5). The top center of the T-shaped support frame (2) is provided with a slot (9). The card plate (5) is inserted into the corresponding slot (9). The top of the T-shaped support frame (2) is symmetrically provided with two sets of mounting slots. The opposite ends of the mounting slots are connected to the slots (9). The inner wall of the mounting slots is fixedly connected to the spring (7). The other end of the spring (7) is fixedly connected to the card block (6). The two sides of the card plate (5) are provided with card slots (8) corresponding to the card block (6). The other end of the card block (6) is engaged with the corresponding card slot (8).

3. The modular pipe gallery steel structure according to claim 2, characterized in that, The T-shaped support frame (2) has a groove corresponding to the card block (6) on the side near the trapezoidal block (4). The side wall of the card block (6) is fixedly connected with a protruding rod. The other end of the protruding rod passes through the corresponding groove. The ends of the two protruding rods on the same side are fixedly connected to a connecting block (10). The middle of the side wall of the connecting block (10) is fixedly connected with a driving rod (11), and the driving rod (11) is located above the corresponding trapezoidal block (4).

4. The modular pipe gallery steel structure according to claim 3, characterized in that, The T-shaped support frame (2) is fixedly connected to the side of the trapezoidal block (4) with a mounting box (12). The top of the mounting box (12) is fixedly connected to a mounting cylinder (13), and the bottom of the mounting cylinder (13) is connected to the corresponding mounting box (12). The inside of the mounting box (12) is rotatably connected to a screw rod (14). The top of the screw rod (14) extends into the inside of the mounting cylinder (13). The outer wall of the screw rod (14) is threadedly connected to a threaded sleeve (15). The top of the threaded sleeve (15) is fixedly connected to a sliding rod (16). The top of the sliding rod (16) passes through the corresponding mounting cylinder (13) and is slidably connected to the inner wall of the mounting cylinder (13). The top of the sliding rod (16) is fixedly connected to the corresponding trapezoidal block (4).

5. The modular pipe gallery steel structure according to claim 4, characterized in that, The bottom outer wall of the lead screw (14) is fixedly fitted with a worm wheel (17), and the inside of the mounting box (12) is rotatably connected with a worm (18), and the worm (18) meshes with the corresponding worm wheel (17). The other end of the worm (18) extends out of the corresponding mounting box (12) and is fixedly connected with a hexagonal rotating rod (19).

6. The modular pipe gallery steel structure according to claim 1, characterized in that, The T-shaped support frame (2) has a storage slot (20) inside one end of the horizontal section and the right end of the mounting bracket (1) near the T-shaped support frame (2). The other end of the horizontal section and the left end of the mounting bracket (1) near the T-shaped support frame (2) have a connecting slot (21) that matches the storage slot (20). The storage slot (20) is rotatably connected to a connecting plate (22).

7. The modular pipe gallery steel structure according to claim 6, characterized in that, Two sets of mounting tubes (23) are fixedly connected to the bottom of the end of the T-shaped support frame (2) near the connecting groove (21) and the bottom of the left end mounting bracket (1). The T-shaped support frame (2) near the connecting groove (21) and the left end mounting bracket (1) are provided with bolt holes corresponding to the mounting tubes (23). The inside of the connecting plate (22) is provided with through holes corresponding to the mounting tubes (23).

8. The modular pipe gallery steel structure according to claim 1, characterized in that, The fixing components include: fastening bolts (24), nuts (25) and tension springs (26). Tension springs (26) are fixedly connected to the inner wall of the bottom end of the mounting tube (23), and nuts (25) are fixedly connected to the top of the tension springs (26). Fastening bolts (24) are inserted into the bolt holes, and the fastening bolts (24) are threadedly connected to the corresponding nuts (25).

9. The modular pipe gallery steel structure according to claim 8, characterized in that, The inner wall of the mounting tube (23) is symmetrically provided with limiting grooves (27), and the side wall of the nut (25) is symmetrically fixedly connected with limiting rods (28), and the limiting rods (28) are slidably embedded in the corresponding limiting grooves (27).

10. A method for assembling a modular pipe gallery steel structure, characterized in that, The assembly method of the modular pipe gallery steel structure according to any one of claims 1-9 includes the following steps: S1. Clean the top surface of the pipe gallery foundation and measure and mark the positioning axis and elevation control points of each support component; hoist the two sets of end mounting frames (1) to the design positions at both ends of the pipe gallery, temporarily fix and calibrate the verticality and elevation; hoist several T-shaped support frames (2) in sequence at the design interval on the longitudinal axis between the two end mounting frames (1) to ensure that the T-shaped support frames (2) on the left and right sides are aligned one by one; S2. Flip the connecting plates (22) in the horizontal section storage slots (20) of each T-shaped support frame (2) in sequence and insert them into the connecting slots (21) of the adjacent left T-shaped support frame (2) to complete the initial longitudinal alignment of the adjacent T-shaped support frames (2); then flip the connecting plates (22) in the storage slots (20) of the right end mounting frame (1) and insert them into the connecting slots (21) of the last T-shaped support frame (2), and at the same time insert the connecting plates (22) of the first T-shaped support frame (2) into the connecting slots (21) of the left end mounting frame (1) to complete the initial longitudinal assembly of the left and right support frames; S3. Insert the fastening bolt (24) vertically downward from the bolt hole at the top of the component. The end of the bolt passes through the through hole inside the connecting plate (22) and enters the installation pipe (23) and contacts the nut (25) inside. Tighten the fastening bolt (24). During the screwing process, the nut (25) slides down along the limiting groove (27) and stretches the tension spring (26) until the fastening bolt (24) is tightened, thus completing the fastening of a single set of longitudinal connection nodes. Complete the fastening operation of all longitudinal connection nodes in sequence to achieve the overall rigid fixation of the pipe gallery steel structure. S4. Hoist the crossbeam (3) to the top of the two sets of T-shaped support frames (2) that are symmetrical on the left and right. Align the card plates (5) at the bottom of both ends of the crossbeam (3) with the slots (9) at the top of the T-shaped support frame (2) and insert them vertically downwards. During the insertion process, the card plates (5) press the guide slopes of the card blocks (6) on both sides, causing the card blocks (6) to retract into the installation groove and compress the spring (7). When the card plates (5) are fully inserted into the slots (9), the slots (8) on both sides of the card plates (5) are aligned with the positions of the card blocks (6). The springs (7) rebound and push the card blocks (6) into the slots (8), automatically completing the horizontal connection and fixation of the crossbeam (3) and the T-shaped support frame (2). Complete the installation of all the crossbeams (3) in this way. S5. Check the overall axial deviation, elevation, verticality and node connection reliability of the pipe gallery. After confirming that all parameters meet the design requirements, the assembly is completed.

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