An underwater support structure for a vertical rotating elevator

Abstract

The utility model relates to underwater operation technical field, specifically disclose a kind of underwater support structure of vertical revolving ladder. The underwater support structure includes: preset in the anchor bolt of riverbed bottom, the anchor bolt is equipped as at least four groups;Base, with the one-to-one correspondence setting of anchor bolt, the base is fixedly connected in the anchor bolt;Support module, form square support structure, the support module is equipped as n, and sequentially set along vertical direction;Connecting piece, equipped as 4 (n+1), the connecting piece is set in the four corners of support module, adjacent support module is detachably connected by the connecting piece, wherein, n is the natural number greater than 1;And, steel plate, on the uppermost layer support module, the steel plate is connected in the support module by the connecting piece. Thus, overcome the problem that underwater support structure stability is insufficient and installation convenience is poor in prior art.

Description

Technical Field

[0001] This utility model relates to the field of underwater operation technology, specifically to an underwater support structure for a vertical ladder. Background Technology

[0002] In today's field of marine infrastructure construction, with the continuous advancement of various marine structures, water conservancy facilities, and marine development projects, the demand for vertical elevators in underwater environments is becoming increasingly prominent. As an important passageway connecting above-water and underwater areas, the safety and stability of vertical elevators are of paramount importance, and the supporting structure is a key component ensuring the normal operation of vertical elevators.

[0003] Currently, most vertical ladder support structures used in underwater environments employ traditional, simple column-type support designs. This type of support structure exhibits serious stability problems when faced with complex and variable water flow impacts. For example, in areas with strong currents, the support columns struggle to withstand continuous lateral forces due to the significant impact force, making them prone to swaying. As the duration of the current's impact and the intensity of its force increase, the support columns may even tilt, posing a significant threat to the safe use of the vertical ladder and potentially leading to its collapse and a major safety accident.

[0004] Meanwhile, the underwater environment is highly corrosive, placing extremely high demands on the materials used in the supporting structure. Common supporting structure materials will corrode and be damaged under the long-term effects of underwater corrosive media. Once the material corrodes, its mechanical properties will decrease significantly, such as reduced strength and toughness, thereby affecting the overall load-bearing capacity and stability of the supporting structure. This not only increases the maintenance cost and frequency of the vertical staircase but may also lead to safety hazards due to untimely maintenance.

[0005] Furthermore, existing underwater support structures for vertical ladders are typically complex to install. Some support structures require underwater piling operations using large underwater construction equipment, necessitating specialized construction teams and equipment. The piling process can also be affected by underwater geological conditions, increasing the difficulty of construction. In addition, the subsequent assembly phase requires precise operation and debugging, resulting in a long construction cycle and high costs.

[0006] Chinese patent application number 202410189463.0 discloses a support structure for building construction. This structure includes a folding frame with two symmetrical drive blocks on its lower side wall that can move relative to or away from each other. This invention is ingenious and easy to use. The design incorporates drive blocks, locking slots, drive rods, gears, and locking posts. When the locking posts limit the drive rods, the drive blocks can drive the drive rods to move synchronously, facilitating the rapid unfolding of the folding frame. A positioning component ensures that the drive rods remain in position after the folding frame is fully unfolded and detached from the drive blocks. The two drive blocks can then move away from each other and contact an adjustment component, which allows for height adjustment of the folding frame using the drive blocks. However, this support structure is primarily used in building construction. Its use in underwater environments presents several limitations. For example, it cannot withstand the highly corrosive underwater environment, its structural design is insufficient to withstand complex water flow impacts, and its folding and adjustment mechanisms may malfunction during underwater installation, failing to meet the specific requirements of underwater vertical ladder support structures.

[0007] In conclusion, further optimization and improvement of the underwater support structure are needed to overcome its insufficient stability and poor installation convenience, thereby improving the safety and reliability of the vertical escalator in the underwater environment, reducing maintenance costs, shortening the construction cycle, and promoting the further development of aquatic infrastructure construction. Utility Model Content

[0008] The purpose of this invention is to provide an underwater support structure for a vertical ladder, so as to overcome the problems of insufficient stability and poor installation convenience of existing underwater support structures.

[0009] This utility model is achieved through the following technical solution:

[0010] An underwater support structure for a vertical spiral staircase includes:

[0011] Anchor bolts pre-installed at the bottom of the riverbed, wherein at least four sets of anchor bolts are provided;

[0012] The base is provided in a one-to-one correspondence with the anchor bolts, and the base is fixedly connected to the anchor bolts;

[0013] The support module is formed into a square support structure, and n support modules are configured and arranged sequentially along the vertical direction;

[0014] The connectors are configured in sets of 4 (n+1) pieces, each connector being located at one of the four corners of the support module. Adjacent support modules are detachably connected via these connectors, where n is a natural number greater than 1; and,

[0015] A steel plate is located on the uppermost support module, and the steel plate is connected to the support module through the connector.

[0016] Alternatively, the support module includes four uprights and four pairs of horizontal bars. The uprights are vertically arranged and connected to the connectors. Each pair of horizontal bars is spaced apart, and both ends of each horizontal bar are connected to the uprights through the connectors, so that they can be used together with the uprights to form a frame structure.

[0017] Alternatively, the support module may further include diagonal braces, with at least four diagonal braces configured, each diagonal brace being inclined and its two ends being connected to connectors arranged diagonally.

[0018] Alternatively, each support module includes eight diagonal braces, with every two diagonal braces arranged in a cross shape and connected to the connector.

[0019] Alternatively, the connector may include:

[0020] Main tube, used to insert the upright;

[0021] A secondary cylinder, used to insert the crossbar, wherein two secondary cylinders are configured and respectively connected to both sides of the main cylinder, and the centerlines of the two secondary cylinders are perpendicular to each other; and,

[0022] Ear plates are used to connect the diagonal brace. Two pairs of ear plates are provided, and each pair of ear plates is respectively arranged on the upper and lower sides of the auxiliary cylinder.

[0023] Alternatively, the ear plate is welded to the secondary cylinder; the secondary cylinder is welded to the main cylinder.

[0024] Alternatively, the main cylinder is provided with a pole mounting hole so that the pole is locked to the main cylinder by a first fastener;

[0025] The auxiliary cylinder is provided with a crossbar mounting hole so that the crossbar is locked to the auxiliary cylinder by a second fastener;

[0026] The ear plate is provided with a diagonal brace mounting hole so that the diagonal brace is locked to the ear plate by a third fastener.

[0027] Alternatively, each pair of crossbars may include a long crossbar and a short crossbar.

[0028] Alternatively, the connection between the base and the bottom of the riverbed may be reinforced with concrete.

[0029] Alternatively, a pad is provided at the connection between the steel plate and the connector, and the steel plate is detachably connected to the pad by a fourth fastener.

[0030] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0031] Through the aforementioned technical solution, the underwater support structure of this vertical ladder, through the coordinated work of anchor bolts, base, bracket modules, connectors, and steel plates, optimizes the design in multiple aspects such as installation, load-bearing capacity, resistance to water flow impact, and corrosion resistance. This effectively solves the problems existing in current underwater support structures, possessing significant advantages such as high stability, good corrosion resistance, and convenient installation. Furthermore, this underwater support structure is disassembled into standardized modules, pre-assembled on land, and then docked underwater, reducing underwater operation time and the risks to divers. Damaged components can be replaced individually without the need for overall dismantling, resulting in low maintenance costs. The bracket modules in this underwater support structure are assembled using a modular structure, providing good flexibility and adaptability to various water depths. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0033] Figure 1 A front view schematic diagram of the underwater support structure for the vertical ladder provided by this utility model in one embodiment;

[0034] Figure 2 A side view of the underwater support structure for the vertical ladder provided by this utility model in one embodiment;

[0035] Figure 3 for Figure 1 A magnified structural diagram of part A in the middle;

[0036] Figure 4 for Figure 1 An enlarged structural diagram of part B;

[0037] Figure 5 for Figure 2 An enlarged structural diagram of section C;

[0038] Figure 6 A front view schematic diagram of the connecting component in the underwater support structure of the vertical ladder provided by this utility model;

[0039] Figure 7 A top view of the connecting component in the underwater support structure of the vertical ladder provided by this utility model.

[0040] The attached diagram shows the markings and corresponding component names: 1-base, 2-support module, 21-upper pole, 22-crossbar, 23-diagonal brace, 3-connector, 31-main cylinder, 311-first mounting hole, 32-secondary cylinder, 321-second mounting hole, 33-ear plate, 331-third mounting hole, 4-steel plate, 51-first fastener, 54-fourth fastener, 6-pad. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that while the description of these embodiments is intended to aid in understanding the present invention, it does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0042] According to a specific embodiment of this disclosure, an underwater support structure for a vertical spiral staircase is provided. Wherein, Figures 1 to 7 Specific embodiments thereof are shown.

[0043] See Figures 1 to 7 As shown, the underwater support structure of the vertical ladder includes: anchor bolts pre-installed at the bottom of the riverbed, with at least four sets of anchor bolts; a base 1, which is set one-to-one with the anchor bolts and is fixedly connected to the anchor bolts; a support module 2, which is formed into a square support structure, with n support modules 2 arranged sequentially in the vertical direction; 4 (n+1) connectors 3, which are set at the four corners of the support module 2, and adjacent support modules 2 are detachably connected by the connectors 3, where n is a natural number greater than 1; and a steel plate 4, located on the uppermost support module 2, which is connected to the support module 2 by the connectors 3.

[0044] During installation, at least four sets of anchor bolts are pre-installed at the bottom of the riverbed. These anchor bolts, deeply embedded in the riverbed, form a solid foundation for the entire support structure through their tight fit. Compared to the complex installation method of traditional underwater support structures, which requires large equipment for underwater piling, the pre-installation process with anchor bolts is much simpler, reducing construction difficulty, shortening the construction period, reducing construction costs, and achieving convenient installation.

[0045] Subsequently, the base 1 was installed and fixedly connected to the anchor bolts one by one. As an important supporting component of the structure, the base 1, through its fixation to the anchor bolts, evenly transfers the load from the upper structure to the anchor bolts, and then distributes it to the bottom of the riverbed. The cooperation between the multiple anchor bolts and the base 1 acts like a stable anchor point, enhancing the connection stability between the entire support structure and the riverbed, effectively resisting the impact of complex underwater currents, thus solving the problem of traditional support structures being prone to swaying and tilting in areas of strong currents, and significantly improving the stability of the underwater support structure.

[0046] The support module 2 is a square support structure arranged sequentially along the vertical direction. The square support structure possesses good mechanical stability, enabling it to withstand external forces from different directions in an underwater environment. Multiple support modules 2 are detachably connected at the four corners via 4 (n+1) connectors 3. This modular design makes the support structure more flexible during installation. Construction personnel can easily assemble the support modules 2 underwater according to actual needs, without complex operations and adjustments, further demonstrating the advantage of convenient installation. Simultaneously, the detachable connection method facilitates later maintenance and component replacement of the support structure, reducing maintenance difficulty and cost. It should be noted that n is a natural number greater than 1.

[0047] A steel plate 4 is installed on the uppermost support module 2, and the steel plate 4 is connected to the support module 2 via connectors 3. The steel plate 4 serves as the direct load-bearing surface of the vertical staircase, evenly distributing the load generated by the staircase and users, and transferring it to the support module 2 below. The stable connection between the steel plate 4 and the support module 2, combined with the stable design of the entire support structure, ensures the safety of the vertical staircase during use.

[0048] Through the aforementioned technical solution, the underwater support structure of this vertical ladder, through the coordinated work of anchor bolts, base 1, support module 2, connector 3, and steel plate 4, optimizes the design in multiple aspects such as installation, load-bearing capacity, resistance to water flow impact, and corrosion resistance. This effectively solves the problems existing in current underwater support structures, possessing significant advantages such as high stability, good corrosion resistance, and convenient installation. Furthermore, this underwater support structure is disassembled into standardized modules, pre-assembled on land, and then docked underwater, reducing underwater operation time and the risks to divers. Damaged components can be replaced individually without overall dismantling, resulting in low maintenance costs. The support module 2 in this underwater support structure adopts a modular assembly structure, providing good flexibility and adaptability to various water depths.

[0049] Specifically, in one embodiment, each set of anchor bolts includes four anchor bolts, thereby providing four anchor bolts on each base to ensure a tight connection with the riverbed. It is understood that this disclosure includes at least 16 anchor bolts.

[0050] In other embodiments, six anchor bolts may be grouped together, and this disclosure does not impose any limitations on this.

[0051] It should be noted that the directional terms used, such as "inner" and "outer," refer to the "inner" and "outer" relative to the outline of the component, facing the component (which can be combined with...). Figure 1 (For understanding purposes) The direction is "inside," and the opposite is "outside." Furthermore, it should be noted that the terms used, such as "first" and "second," are used to distinguish one element from another and do not indicate sequence or importance. Moreover, in the following descriptions with accompanying drawings, the same reference numerals in different drawings represent the same element.

[0052] In one embodiment provided in this disclosure, the support module 2 includes four uprights 21 and four pairs of crossbars 22. The uprights 21 are vertically arranged and connected to the connectors 3. Each pair of crossbars 22 is spaced apart, and both ends of each crossbar 22 are connected to the uprights 21 through the connectors 3, so that they can be used together with the uprights 21 to form a frame structure.

[0053] Four vertically positioned uprights 21 serve as the primary vertical load-bearing components, directly bearing the vertical load transmitted from the upper steel plate 4 and transferring it downwards to the base 1 and anchor bolts. This clear and direct vertical force transmission path ensures the overall load-bearing capacity of the support structure in the vertical direction. Four pairs of spaced horizontal bars 22 connect with the uprights 21, forming a stable rectangular frame structure. The horizontal bars 22 not only enhance the horizontal resistance of the support module 2 to lateral displacement and effectively resist the lateral impact force generated by complex underwater currents, but also, through their interaction with the uprights 21, create a stable spatial force-bearing system for the support module 2. Compared to traditional simple column supports, this frame structure, when subjected to water flow impacts, can distribute external forces throughout the support module 2 through the mutual constraint between the horizontal bars 22 and the uprights 21, greatly improving the overall stability of the support structure and effectively preventing swaying and tilting in areas with strong currents.

[0054] In terms of ease of installation, both the uprights 21 and the crossbars 22 are connected by connectors 3. This modular design makes the assembly of the components very simple. When working underwater, construction personnel only need to connect the uprights 21 to the connectors 3 and then install the crossbars 22 in sequence to complete the assembly of the support module 2. No complex welding or precision on-site processing is required, reducing reliance on large underwater construction equipment and specialized construction techniques, significantly shortening the construction cycle, and reducing construction difficulty and cost. At the same time, the detachable connection method facilitates later inspection, repair, and replacement of the support module 2, further improving maintenance convenience.

[0055] Furthermore, the support module 2 also includes diagonal braces 23, with at least four diagonal braces 23 arranged at an angle, each end of which is connected to diagonally arranged connectors 3. The arrangement of the diagonal braces 23 can construct a stable triangular force-bearing structure. When the underwater support structure of the vertical ladder is subjected to the impact of complex underwater currents, eccentric loads generated by personnel use, or other irregular external forces, the diagonal braces 23 can quickly and evenly distribute the forces originally acting on the uprights 21 and crossbars 22 to all components of the entire support module 2 through the force transmission characteristics of the triangle, thereby improving the overall deformation resistance of the underwater support structure.

[0056] Furthermore, each support module 2 includes eight diagonal braces 23, with every two diagonal braces 23 arranged in a cross shape and connected to the connector 3. The eight diagonal braces 23 arranged in a cross shape create multiple interconnected triangular stabilizing structures within the support module 2, enabling it to better resist external forces from different directions. Compared to a smaller number of diagonal braces 23 or a non-cross-shaped arrangement, this structure significantly reduces the deformation of the support module 2 under stress, greatly improving the overall structural stability and rigidity. This prevents the support module 2 from twisting or deforming due to uneven stress in complex underwater environments, providing a solid and reliable support foundation for the vertical ladder.

[0057] In this disclosure, the connector 3 includes: a main cylinder 31 for inserting the upright rod 21; a secondary cylinder 32 for inserting the crossbar 22, two secondary cylinders 32 are configured and respectively connected to both sides of the main cylinder 31, the center lines of the two secondary cylinders 32 are perpendicular to each other; and ear plates 33 for connecting to the diagonal brace 23, two pairs of ear plates 33 are configured, and each pair of ear plates 33 is respectively disposed on the upper and lower sides of the secondary cylinder 32.

[0058] The main cylinder 31 and the uprights 21 adopt a plug-in design. The tight fit between the cylindrical inner wall and the outer wall of the uprights 21 ensures that the uprights 21 are installed strictly vertically, avoiding stress concentration caused by tilting. Simultaneously, the main cylinder 31 serves as a vertical load transfer hub, directly transmitting the weight of the superstructure to the uprights 21, and then distributing it to the foundation via the base 1, ensuring a simple and efficient load path. The top and bottom of the main cylinder 31 can be connected to the uprights 21 of the upper and lower support modules 2, forming a vertically stacked expansion (e.g., increasing the number of modules according to water depth).

[0059] The two auxiliary tubes 32 have their center lines perpendicular to each other, corresponding to the horizontal X-axis and Y-axis respectively (refer to a spatial rectangular coordinate system). The crossbars 22 are inserted into the auxiliary tubes to form a rectangular frame. This orthogonal design allows the crossbars 22 to constrain each other in two directions, jointly resisting horizontal forces (such as water flow impact and wind force). After the crossbars 22 and the uprights 21 are connected through the auxiliary tubes 32, they form a quadrilateral rigid unit, which evenly distributes the horizontal load to each member and reduces local overload.

[0060] The plug-in connection between the secondary cylinder 32 and the crossbar 22 supports quick assembly and disassembly, eliminating the need for welding or complex bolt connections. During underwater construction, operators can quickly assemble the prefabricated modules, reducing underwater operation time. If the support size needs to be adjusted later (such as widening the platform), simply increase or decrease the number of crossbars 22 or adjust the connection position of the secondary cylinder 32, offering high flexibility.

[0061] Ear plates 33 are located on the upper and lower sides of the auxiliary cylinder 32 to connect the diagonal braces 23 (especially the cross-braces 23), fixing the two ends of the diagonal braces 23 to the diagonal of the frame, forming a triangular stable structure. After the diagonal braces 23 are connected to the connectors 3 through the ear plates 33, the shear force and torque can be converted into the axial tensile force or compressive force of the diagonal braces 23, using the geometric stability of the triangle to resist the deformation of the frame. The ear plates 33 on the upper and lower sides make the diagonal braces 23 form a "three-dimensional truss" effect, for example, providing support in both the horizontal and vertical planes simultaneously, preventing spatial torsion of the support module 2. In addition, the symmetrical arrangement of the ear plates 33 allows the diagonal braces 23 to evenly distribute the load. The diagonal braces 23 transmit the horizontal force to the opposite uprights 21 and crossbars 22 through the ear plates 33, avoiding a single member bearing a concentrated load.

[0062] Specifically, the ear plate 33 is welded to the auxiliary cylinder 32; and / or, the auxiliary cylinder 32 is welded to the main cylinder 31. This helps to ensure the connection strength between the auxiliary cylinder 32, the main cylinder 31, and the ear plate 33, thereby constructing a high-strength rigid frame structure that provides a precise and stable installation foundation. This allows the uprights 21, crossbars 22, and diagonal braces 23 to form a high-strength working foundation after being connected to the connector 3. For ease of on-site operation, the ear plates and auxiliary cylinders, and the auxiliary cylinders and main cylinders are usually welded together in the factory and then assembled on the construction site.

[0063] It should be noted that the "and / or" appearing in the text refers to A and / or B, which is intended to represent three possibilities: only option A exists, only option B exists, and both options A and B exist simultaneously.

[0064] In one embodiment provided in this disclosure, the main cylinder 31 is provided with mounting holes for uprights 21, so that the uprights 21 are locked to the main cylinder 31 by a first fastener 51; the auxiliary cylinder 32 is provided with mounting holes for crossbars 22, so that the crossbars 22 are locked to the auxiliary cylinder 32 by a second fastener; and the ear plate 33 is provided with mounting holes for diagonal braces 23, so that the diagonal braces 23 are locked to the ear plate 33 by a third fastener. Based on the structure of the main cylinder 31, the auxiliary cylinder 32, and the ear plate 33, the positive effects and beneficial functions of this design are analyzed and described in detail.

[0065] The main tube 31, auxiliary tube 32, ear plate 33, and uprights 21 / horizontal bars 22 / diagonal braces 23 are connected by fasteners and can be disassembled into independent components for installation. This modular installation structure allows for the easy combination of different numbers of support modules 2 as needed. For example, in river regulation projects, the height of the uprights 21 can be adjusted according to the water depth, and the uprights 21 can be locked at different positions through the mounting holes of the main tube 31, eliminating the need for customized welding components. Simultaneously, it facilitates the maintenance of this underwater support structure. For instance, when a component is damaged (such as the diagonal brace 23 deformed by a ship impact), only the third fastener of the corresponding ear plate 33 needs to be removed to replace the diagonal brace 23 individually, without damaging the overall structure.

[0066] It should be noted that the first fastener 51, the second fastener, the third fastener and the fourth fastener 54 are all equipped with a fastening structure constructed by screws and nuts.

[0067] In one possible design, each pair of crossbars 22 includes one long crossbar 22 and one short crossbar 22. The long crossbar 22 is used for main structural connections with larger spans, while the short crossbar 22 is used for local reinforcement or corners. The combination of the long crossbar 22 (large span, low stiffness) and the short crossbar 22 (small span, high stiffness) can balance the deformation of various parts of the structure, thereby improving the overall strength of the structure.

[0068] In this disclosure, concrete is poured at the connection between the base 1 and the riverbed bottom. The concrete forms a dual anchorage of "mechanical interlocking and chemical bonding" with the riverbed bedrock / soil layer. Specifically, the concrete flows into the surface fissures of the riverbed (such as rock joints and pebble gaps), forming an inverted wedge-shaped embedment, with a pull-out resistance higher than that of simple anchorage by the self-weight of the base 1. The cement hydration products react with the silicates in the rock to form calcium silicate hydrate colloids, which is equivalent to the base 1 forming a "rigid integral" with the riverbed. In this way, it is better suited for complex riverbed environments such as strong water flow, high erosion, and soft soil foundations, such as cross-river bridges, water conservancy projects, and underwater pipeline supports.

[0069] In this disclosure, a pad 6 is provided at the connection between the steel plate 4 and the connector 3. The steel plate 4 is detachably connected to the pad 6 by a fourth fastener 54. The pad 6 (usually made of materials such as rubber, engineering plastics, or metal gaskets) can fill the small gaps between the steel plate 4 and the connector 3, avoiding local stress concentration caused by rigid contact. For example, when the structure is subjected to dynamic loads (such as water flow impact or vibration), the pad 6 absorbs energy through elastic deformation, reducing fatigue damage to the connector 3 and the steel plate 4, and extending the overall structural life. At the same time, when the usage environment or load requirements change, the detachable design allows for flexible adjustment of structural performance by replacing the pad 6 (such as adjusting the thickness or material of the pad 6) or the steel plate 4 (such as replacing it with a high-strength steel plate 4).

[0070] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

[0071] Finally, it should be noted that this utility model is not limited to the above-described optional embodiments, and anyone can derive other various forms of products under the guidance of this utility model. The above specific embodiments should not be construed as limiting the scope of protection of this utility model, which should be determined by the claims, and the description can be used to interpret the claims.

Claims

1. An underwater support structure for a vertical spiral staircase, characterized in that, include: Anchor bolts pre-installed at the bottom of the riverbed, wherein at least four sets of anchor bolts are provided; The base is provided in a one-to-one correspondence with the anchor bolts, and the base is fixedly connected to the anchor bolts; The support module is formed into a square support structure, and n support modules are configured and arranged sequentially along the vertical direction; The connectors are configured in sets of 4 (n+1) pieces, each connector being located at one of the four corners of the support module. Adjacent support modules are detachably connected via the connectors, where n is a natural number greater than 1; and, A steel plate is located on the uppermost support module, and the steel plate is connected to the support module through the connector.

2. The underwater support structure for the vertical spiral staircase according to claim 1, characterized in that, The support module includes four uprights and four pairs of horizontal bars. The uprights are vertically arranged and connected to the connectors. Each pair of horizontal bars is spaced apart, and both ends of each horizontal bar are connected to the uprights through the connectors, so that they can be used together with the uprights to form a frame structure.

3. The underwater support structure for the vertical spiral staircase according to claim 2, characterized in that, The support module also includes diagonal braces, with at least four diagonal braces configured, each diagonal brace being inclined and its two ends being connected to connectors arranged diagonally.

4. The underwater support structure for the vertical spiral staircase according to claim 3, characterized in that, Each support module includes eight diagonal braces, with every two diagonal braces arranged in a cross shape and connected to the connector.

5. The underwater support structure for the vertical spiral staircase according to claim 4, characterized in that, The connector includes: Main tube, used to insert the upright; A secondary cylinder, used to insert the crossbar, wherein two secondary cylinders are configured and respectively connected to both sides of the main cylinder, and the centerlines of the two secondary cylinders are perpendicular to each other; and, Ear plates are used to connect the diagonal brace. Two pairs of ear plates are provided, and each pair of ear plates is respectively arranged on the upper and lower sides of the auxiliary cylinder.

6. The underwater support structure for the vertical spiral staircase according to claim 5, characterized in that, The ear plate is welded to the secondary cylinder; and / or, the secondary cylinder is welded to the main cylinder.

7. The underwater support structure for the vertical spiral staircase according to claim 5, characterized in that, The main cylinder is provided with a pole mounting hole so that the pole can be locked to the main cylinder by a first fastener; The auxiliary cylinder is provided with a crossbar mounting hole so that the crossbar is locked to the auxiliary cylinder by a second fastener; The ear plate is provided with a diagonal brace mounting hole so that the diagonal brace is locked to the ear plate by a third fastener.

8. The underwater support structure for the vertical spiral staircase according to claim 2, characterized in that, Each pair of crossbars consists of a long crossbar and a short crossbar.

9. The underwater support structure for the vertical spiral staircase according to claim 1, characterized in that, The connection between the base and the bottom of the riverbed is made of concrete.

10. The underwater support structure for the vertical spiral staircase according to claim 1, characterized in that, A pad is provided at the connection between the steel plate and the connector, and the steel plate is detachably connected to the pad by a fourth fastener.

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