Leakage-free reusable assembled steel structure caisson
By using modular design and expansion sealing strip technology for prefabricated steel structure caissons, the problems of slow construction speed, high cost and water leakage of traditional steel structure caissons have been solved, achieving a fast, economical and reusable construction effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ARCHITECTURAL DESIGN RES INST OF GUANGDONG PROVINCE
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional steel structure caissons are slow to construct, costly, and prone to water leakage. Welded connections are difficult to guarantee quality, and prefabricated components are prone to water seepage at joints, making them unusable.
The prefabricated steel structure caisson is constructed by bolting together standard pipe sections and cutting edge pipe sections, and sealing it with expansion sealing strips. This avoids on-site welding, achieves modular design, and improves construction efficiency and reusability.
This has enabled the rapid, standardized, and economical construction of steel structure caissons, reduced construction costs, ensured a leak-free effect, facilitated transportation and storage, and improved utilization.
Smart Images
Figure CN224578753U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building foundation pit support technology, and more specifically to a leak-free, reusable prefabricated steel structure caisson. Background Technology
[0002] Caisson technology is an important support technique in foundation pit engineering, and in recent years it has been widely used in bridge engineering, tunnel engineering, municipal engineering, water conservancy engineering, and other fields. Traditional caissons mostly use concrete and / or reinforced concrete structures. Concrete caissons require on-site pouring and curing, while reinforced concrete caissons require on-site reinforcement binding, resulting in a long construction period and generating a large amount of dust, noise, and construction waste, causing pollution to the surrounding environment. Concrete caissons are inexpensive, but they are large in size and weight, making transportation and hoisting difficult. After sinking, they are generally buried in the soil and cannot be reused. Uneven sinking can also easily cause cracks in the caisson walls.
[0003] Steel structure caissons are lightweight and high-strength, and can be used as temporary or permanent support structures for underground structures, such as tunnel shafts, pipe jacking working shafts or receiving shafts, pump station water intake shafts, and pipeline maintenance shafts. Steel structure components are typically connected by welding or bolting. Welding results in a large number of welds on-site, making it difficult to guarantee welding quality, and weld inspection slows down construction. Welded steel structure caissons are also difficult to recycle and store, making them unsuitable for reuse in subsequent projects, significantly increasing manufacturing costs. Bolted assembly connections, on the other hand, often result in inadequate treatment of joints between components, easily leading to water seepage and leakage, affecting construction quality and subsequent use.
[0004] Patent application CN119321134A discloses a single-walled steel caisson with T-shaped ribs and its construction method. T-shaped standard stiffening ribs are evenly spaced circumferentially on the outer wall of a single circular steel caisson section, enhancing the strength and rigidity of the structure. The single-section steel caisson is welded together to form a longitudinally extending section, ensuring the caisson's downward pressure depth. While this patent improves the load-bearing capacity of the steel caisson by using T-shaped standard stiffening ribs, allowing for further longitudinal depth development, the welded connection method results in a large amount of on-site welding work, and the welding quality is difficult to guarantee. Furthermore, the single-section steel caisson is not prefabricated and cannot be disassembled into smaller components. After welding, the steel caisson forms a single unit, which, while providing good load-bearing performance, occupies a large space, making hoisting, transportation, and storage extremely inconvenient.
[0005] Therefore, there is an urgent need for a prefabricated steel structure caisson that can improve the construction speed of steel structure caissons and solve the problem of water leakage at the joints of prefabricated components. Utility Model Content
[0006] In view of this, this utility model provides a leak-free, reusable prefabricated steel structure caisson, which is a modular, rapidly assembled, and highly sealed caisson device that can be reused, solving the problems of low efficiency, high cost, and slow construction speed in traditional caisson construction. By adopting prefabricated steel structure technology, the construction of steel structure caissons is made faster, more standardized, more environmentally friendly, and more economical, which is in line with the trend of green and low-carbon development.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A leak-free, reusable prefabricated steel structure caisson includes standard pipe sections, cutting edge pipe sections, and expansion sealing strips;
[0009] The standard pipe section is a circular pipe section formed by bolting together multiple standard arc-shaped plates; the top and bottom ends of the inner arc surfaces of the multiple standard arc-shaped plates are fixed with inner stiffening plates; the cutting edge pipe section is a circular pipe section formed by bolting together multiple cutting edge arc-shaped plates; the top end of the inner arc surface of the multiple cutting edge arc-shaped plates is fixed with a connecting stiffening plate; the connecting stiffening plate and the inner stiffening plate located at the bottom end of the standard arc-shaped plate are fastened together by tensile bolts to connect the cutting edge pipe section and the standard pipe section;
[0010] The expansion waterstop strip is embedded between the two opposing panels of the inner stiffening plate and the connecting stiffening plate.
[0011] The beneficial effects of this utility model are as follows: the standard pipe section is composed of multiple standard arc-shaped plates bolted together, and the cutting edge pipe section is composed of multiple cutting edge arc-shaped plates bolted together. The steel caisson is constructed by bolting together the standard pipe section and the cutting edge pipe section. This modular design of the steel caisson avoids on-site welding through bolted connections, making construction more convenient and faster. The expandable water-stop strip expands upon contact with water, sealing the gaps in the steel caisson and preventing leakage. Furthermore, disassembling the steel caisson into multiple arc-shaped plates facilitates transportation and minimizes space occupation. The bolted connections allow for reuse, increasing utilization and reducing construction costs, resulting in higher economic efficiency. This utility model improves construction efficiency through standardized design, achieves excellent water-stopping effects by using expandable water-stop strips to seal between pipe sections, and optimizes the connection method, resulting in significant economic benefits.
[0012] Preferably, standard stiffening ribs are fixed to both ends of the inner arc surface of the standard arc plate; two opposite standard stiffening ribs on two adjacent standard arc plates are fastened with shear bolts. The standard arc plates are connected by shear bolts using standard stiffening ribs, which facilitates installation and disassembly. By disassembling the standard pipe section into multiple standard arc plates, transportation and storage are convenient, and compared with welding, the bolted connection results in a more complete standard arc plate after disassembly, leading to a higher turnover rate.
[0013] Preferably, the expansion sealing strip is embedded between the two opposite standard stiffening ribs on two adjacent standard arc-shaped plates. Embedding the expansion sealing strip on two adjacent standard arc-shaped plates in the standard pipe section for sealing can prevent water leakage from the gaps in the standard arc-shaped plates.
[0014] Preferably, the two ends of the standard stiffening rib are fixed to the two opposing panels of the two inner stiffening plates at the top and bottom of the standard arc-shaped plate, respectively. The standard stiffening rib and the inner stiffening plates are fixed together as a whole, which can improve the stiffness and compressive strength of the standard arc-shaped plate and effectively resist lateral earth pressure.
[0015] Preferably, both ends of the inner arc surface of the cutting edge arc plate are fixed with cutting edge stiffening ribs; two opposing cutting edge stiffening ribs on two adjacent cutting edge arc plates are fastened with shear bolts. The two cutting edge arc plates on the cutting edge tube section are bolted together using the cutting edge stiffening ribs, facilitating installation and disassembly. By disassembling the cutting edge tube section into multiple cutting edge arc plates, transportation and storage are convenient, and compared to welding, bolted connections result in more complete disassembled cutting edge arc plates with a higher reuse rate.
[0016] Preferably, the expansion water-stop strip is embedded between the two opposing stiffening ribs on two adjacent curved cutting edge plates. The use of expansion water-stop strips embedded on adjacent curved cutting edge plates in the cutting edge section for sealing prevents water leakage from the gaps in the standard curved plates.
[0017] Preferably, the upper end of the cutting edge stiffening rib is fixed to the panel of the connecting stiffening plate; the lower end has a cutting edge. The cutting edge stiffening rib and the connecting stiffening plate are connected as a whole, which can improve the stiffness and compressive resistance of the standard arc plate and effectively resist lateral earth pressure.
[0018] Preferably, the number of standard arc-shaped plates and the number of cutting edge arc-shaped plates are the same, and the rounded angle of their arcs is no greater than 45°. This ensures an effective connection between the cutting edge pipe section and the standard pipe section.
[0019] Preferably, there are multiple standard pipe sections, which are bolted together vertically; the cutting edge pipe section is bolted to the lowest standard pipe section.
[0020] Preferably, the expansion waterstop strip is a self-compacting water-swellable waterstop strip.
[0021] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a leak-proof, reusable prefabricated steel structure caisson, improving the assembly method of the steel structure caisson by replacing welding connections with high-strength bolt splicing, greatly reducing the amount of on-site welding work and making construction more convenient. The self-sealing, water-swellable waterproof strip structure ensures a leak-proof effect within the prefabricated steel structure caisson. The arc-shaped plate is small in size, convenient for transportation, and occupies little storage space. After use in a project, the steel structure caisson can be recycled, disassembled, and stored for use in the next project, significantly reducing usage costs and demonstrating good economic efficiency. This utility model improves construction efficiency through standardized design; the expandable water-stop strip achieves a seal on the steel caisson, achieving a good water-stopping effect; and the optimized connection method has significant economic benefits. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0023] Figure 1 A schematic diagram of the steel caisson structure provided by this utility model;
[0024] Figure 2 A schematic diagram of the standard arc-shaped plate structure provided for this utility model;
[0025] Figure 3 A schematic diagram of the arc-shaped cutting edge plate structure provided by this utility model;
[0026] Figure 4 A top view of a standard curved plate splicing assembly provided for this utility model;
[0027] Figure 5 A front view of the steel caisson provided by this utility model.
[0028] Among them, 1-standard pipe section; 11-standard arc plate; 12-standard stiffening rib; 13-internal stiffening plate; 2-cutting edge pipe section; 21-cutting edge arc plate; 22-cutting edge stiffening rib; 23-connecting stiffening plate; 24-cutting edge; 3-expansion waterstop strip. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] This utility model discloses a leak-free, reusable prefabricated steel structure caisson, including a standard pipe section 1, a cutting edge pipe section 2, and an expansion waterstop strip 3; the standard pipe 1 is a circular pipe section formed by bolting together multiple standard arc-shaped plates 11; the top and bottom ends of the inner arc surfaces of the multiple standard arc-shaped plates 11 are fixed with inner stiffening plates 13; both sides of the inner arc surfaces of the standard arc-shaped plates 11 are fixed with standard stiffening ribs 12; two opposite standard stiffening ribs 12 on two adjacent standard arc-shaped plates 11 are fastened with shear bolts.
[0031] The cutting edge tube section 2 is a circular tube section formed by bolting together multiple cutting edge arc plates 21; a connecting stiffening plate 23 is fixed at the top of the inner arc surface of the multiple cutting edge arc plates 21; both sides of the inner arc surface of the cutting edge arc plates 21 are fixed with cutting edge stiffening ribs 22; two opposite cutting edge stiffening ribs 22 on two adjacent cutting edge arc plates 21 are fastened by shear bolts.
[0032] The connecting stiffening plate 23 is fastened to the inner stiffening plate 13 located at the bottom of the standard arc plate 11 by tensile bolts to connect the cutting edge pipe section 2 and the standard pipe section 1.
[0033] The expansion waterstop strip 3 is embedded between the inner stiffening plate 13 and the two opposite panels of the connecting stiffening plate 23. The expansion waterstop strip 3 is also embedded between the two opposite standard stiffening ribs 12 on the two adjacent standard arc plates 11 and between the two opposite blade stiffening ribs 22 on the two adjacent blade arc plates 21.
[0034] Both tensile and shear bolts are high-strength bolts. Several bolt holes are provided on the internal stiffening plate, connecting stiffening plate, standard stiffening ribs, and cutting edge stiffening ribs. High-strength friction-type shear bolts are used to assemble eight standard arc-shaped plates and cutting edge arc-shaped plates into a standard pipe section and a cutting edge pipe section, passing through the bolt holes on the standard stiffening ribs and cutting edge stiffening ribs. High-strength tensile bolts are used between sections to connect the standard pipe section and the cutting edge pipe section, passing through the bolt holes on the internal stiffening plate and connecting stiffening plate. High-strength tensile bolts are also used between sections to connect two standard pipe sections, passing through the bolt holes on two stiffening plates.
[0035] The bolts are subjected to the most unfavorable stress state during the pipe section hoisting and lifting process. The upper pipe section bears the weight of the lower pipe section through the high-strength tensile bolts between the sections. The bolts experience minimal stress when the pipe section sinks and is subjected to water and soil pressure.
[0036] In this embodiment, the number of standard arc-shaped plates 11 and the number of cutting edge arc-shaped plates 21 are the same, and the circular angle of their arcs is no greater than 45°. Specifically, the number of standard arc-shaped plates 11 and cutting edge arc-shaped plates 21 can both be 8 pieces, with the arc length of each arc-shaped plate being 1 / 8 of the circumference of the steel caisson, and the central angle of the arc being 45°. Both the standard stiffening ribs and the cutting edge stiffening ribs are rib-shaped, with their plate surfaces pointing towards the center of the steel caisson.
[0037] In order to further optimize the above technical solution, improve the structural stiffness of the standard arc plate and ensure that it has sufficient resistance to lateral earth pressure, the two ends of the standard stiffening rib 12 are fixed to the two panels opposite to the two inner stiffening plates 13 at the top and bottom of the standard arc plate 11, respectively.
[0038] To further optimize the above technical solution and improve the structural rigidity of the curved cutting edge plate so that it has sufficient ability to resist lateral earth pressure, the upper end of the cutting edge stiffening rib 22 is fixed to the panel of the connecting stiffening plate 23.
[0039] In other specific embodiments, there are multiple standard pipe sections 1, which are bolted together vertically; the cutting edge pipe section 2 is bolted to the lowermost standard pipe section 1. The lower end of the cutting edge stiffening rib 22 has a cutting edge 24.
[0040] As the bottom pipe of a steel caisson, the cutting edge pipe section is easier to anchor in the soil by setting a cutting edge, and the standard pipe section improves construction efficiency by connecting with bolts.
[0041] In this embodiment, the expansion waterstop strip 3 is a self-compacting water-expanding waterstop strip.
[0042] During the assembly of individual pipe sections, water-swellable sealing strips are added at the joints between the stiffening ribs of the curved plates. As the pipe section settles, it withstands external water and soil pressure. When the external pressure is evenly distributed along the outer wall of the pipe section, the circular pipe section converts the external radial pressure into circumferential pressure inside, ensuring a tight fit between all components. When water seeps into the pipe section through the vertical joints, the water-swellable sealing strip expands upon contact with water. The greater the external water pressure and the tighter the stiffening ribs between the pipe sections, the greater the expansion volume of the water-swellable sealing strip, forming a self-sealing waterproof system for each individual pipe section.
[0043] Expansion seal strips are installed between each pipe section. When assembling the next pipe section during the sinking process, water-swellable seal strips are added at the stiffening plate joints. High-strength tensile bolts are used between the sections to apply pressure to the stiffening plates, ensuring a tight fit. When water seeps into the pipe section through the transverse joints after sinking, the expansion seal strips expand upon contact with water, filling the transverse joints completely and preventing leakage inside the caisson.
[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.
[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A leak-tight reusable fabricated steel structure caisson, characterized in that, It includes standard pipe sections (1), blade-edge pipe sections (2), and expansion sealing strips (3); The standard pipe section (1) is a circular pipe section formed by bolting together multiple standard arc plates (11); the top and bottom ends of the inner arc surfaces of the multiple standard arc plates (11) are fixed with inner stiffening plates (13); the cutting edge pipe section (2) is a circular pipe section formed by bolting together multiple cutting edge arc plates (21); the top ends of the inner arc surfaces of the multiple cutting edge arc plates (21) are fixed with connecting stiffening plates (23); the connecting stiffening plates (23) and the inner stiffening plates (13) located at the bottom end of the standard arc plates (11) are fastened together with tensile bolts to connect the cutting edge pipe section (2) and the standard pipe section (1); The expansion waterstop strip (3) is embedded between the two opposing panels of the inner stiffening plate (13) and the connecting stiffening plate (23).
2. A leak-tight reusable fabricated steel structure caisson according to claim 1, characterized in that, Standard stiffening ribs (12) are fixed on both sides of the inner arc surface of the standard arc plate (11); two opposite standard stiffening ribs (12) on two adjacent standard arc plates (11) are fastened by shear bolts.
3. A leak-tight reusable fabricated steel structure caisson according to claim 2, characterized in that, The expansion waterstop strip (3) is embedded between the two opposite standard stiffening ribs (12) on two adjacent standard arc-shaped plates (11).
4. A leak-tight reusable fabricated steel structure caisson according to claim 2, characterized in that, The two ends of the standard stiffening rib (12) are fixed to the two panels opposite the two inner stiffening plates (13) at the top and bottom of the standard arc plate (11).
5. The leak-tight reusable fabricated steel structure caisson according to claim 1, wherein, Both ends of the inner arc surface of the cutting edge arc plate (21) are fixed with cutting edge stiffening ribs (22); the two opposite cutting edge stiffening ribs (22) on the two adjacent cutting edge arc plates (21) are fastened by shear bolts.
6. A leak-tight reusable fabricated steel structure caisson according to claim 5, characterized in that, An expansion waterstop strip (3) is embedded between two opposing blade stiffening ribs (22) on two adjacent blade arc plates (21).
7. A leak-tight reusable fabricated steel structure caisson according to claim 5, characterized in that, The upper end of the blade stiffening rib (22) is fixed to the panel of the connecting stiffening plate (23); the lower end is provided with a blade edge (24).
8. The leak-tight reusable fabricated steel structure caisson according to claim 1, wherein, The number of standard arc-shaped plates (11) and the number of cutting edge arc-shaped plates (21) are the same, and the circular angle of their arcs is no greater than 45°.
9. The leak-tight reusable fabricated steel structure caisson as claimed in claim 1, wherein, The number of standard pipe sections (1) is multiple, and the multiple standard pipe sections (1) are bolted together vertically; the cutting edge pipe section (2) is bolted to the lowest standard pipe section (1).
10. The leak-tight reusable fabricated steel structure caisson as claimed in claim 1, wherein, The expansion waterstop strip (3) is a self-compacting water-expanding waterstop strip.