A data center design and construction method for connecting a subsea tunnel to a subsea pipeline

Abstract

The application discloses a data center design and construction method for connecting a submarine tunnel and a submarine pipe gallery, and belongs to the technical field of submarine data center construction; the submarine tunnel and the submarine pipe gallery are connected through a special connecting structure, and meanwhile, a design method and a construction method for connecting the submarine tunnel and the submarine pipe gallery which connect the coast and the seabed are given; the data center constructed through the method can realize the transfer of personnel and materials between the coast and the seabed through the connection between the submarine tunnel and the submarine pipe gallery, and solves the problem of the difficulty in connecting and transferring resources between the submarine data center and the shore base.

Description

Technical Field

[0001] This invention relates to the field of submarine data center construction technology, and in particular to a design and construction method for a data center connecting submarine tunnels and submarine utility tunnels. Background Technology

[0002] Submarine data centers are an important part of "new infrastructure". When constructing them using submarine tunnel structures, it is usually necessary to solve the problem of connecting the submarine data center with the shore base to enable the access of personnel, vehicles and equipment. At present, there is no construction scheme that can completely solve this problem. At the same time, the project needs to cross sea areas of different depths. The settlement control of various structures under complex geological conditions is a major challenge in the construction of the project, and there is relatively little research on this.

[0003] Starting with the connection between submarine tunnels and submarine utility tunnels, this paper studies the design and construction methods of data centers, solves the difficult problem of connecting submarine data centers with onshore resources, and proposes a design and construction method for data centers that connect submarine tunnels and submarine utility tunnels. This method can effectively address the problem of connecting submarine data centers with onshore infrastructure and has promotional and application value for the construction of submarine data centers. Summary of the Invention

[0004] To overcome the problems existing in the above technologies, the present invention provides a method for designing and constructing a data center connecting a submarine tunnel and a submarine utility tunnel, wherein the data center includes:

[0005] Subsea tunnel; subsea utility tunnel; connection structure between subsea tunnel and subsea utility tunnel; data container;

[0006] The undersea tunnel includes: a structure for connecting islands, reefs and breakwaters, enabling people, vehicles and equipment to access the interior of the utility tunnel from the shore; the undersea tunnel road adopts either a one-way road with a vehicle U-turn area or a two-way road; the undersea tunnel structure adopts either a reinforced concrete structure or a steel-concrete composite structure.

[0007] The submarine utility tunnel comprises a box-type structure consisting of circular and square sections, with openings on its sides. These openings are used to connect the tunnel to the data container via flange connections. The flange connection is a mechanical method for connecting pipes and equipment.

[0008] The connection structure between the submarine tunnel and the submarine utility tunnel includes: the connection is achieved by a combination of flange connection, waterstop structure, prestressed cable and anchoring structure.

[0009] The data cabin includes: the outer shell of the data cabin is made of high-strength alloy material, and the outer shell is usually spherical or cylindrical, and the interior houses server clusters, data acquisition equipment and drainage pipes.

[0010] The design methods include:

[0011] The subsea tunnel will connect the islands, reefs, and breakwater foundations with the subsea utility tunnel. It will utilize either a one-way road with a U-turn area or a two-way road to meet the load requirements for people and vehicles, and facilitate the transfer of people, vehicles, and equipment. After the substructure construction, either reinforced concrete or steel-concrete composite structures will be used as the tunnel's construction materials. The tunnel layout will be divided into a buried section, a revetment section, and an underwater section. Each section will employ anti-settlement and anti-horizontal displacement foundation structures to ensure the subsea tunnel's stability under marine conditions and seismic activity. At the underwater end of the subsea tunnel, a dedicated connecting structure will connect to the subsea utility tunnel's cross-section. The design requires that the cross-section of the dedicated connecting structure be consistent with the cross-section of the subsea utility tunnel, and, while meeting the docking error requirements, the diameter of the dedicated connecting structure should be larger than that of the subsea utility tunnel.

[0012] Through the construction of the subsea utility tunnel's foundation and the reinforcement of the subsea utility tunnel after its connection with the subsea tunnel, the overall structure of the subsea utility tunnel is made stable under the stress and deformation of the marine environment and seismic action. On the basis of overall structural stability, the tunnel achieves all the structural design functions of internal vehicle passage, pipeline passage, ventilation, lighting, and ladders for personnel to climb up and down.

[0013] After connecting the subsea tunnel and the subsea utility tunnel, multiple data modules are connected to the side of the subsea utility tunnel via flange connections.

[0014] Construction methods include:

[0015] The project includes: construction of the subsea tunnel and subsea utility tunnel foundations; segmented construction of the subsea tunnel; underwater installation of the subsea utility tunnel; connection construction of the subsea tunnel and subsea utility tunnel; and connection construction of the subsea utility tunnel and data container.

[0016] In addition, the data center also includes: the selection of the data center location; the selection of the submarine tunnel location in an area with small water depth variations as the seabed soil layer as the structural connection section to the shore foundation, and the inclination angle of the tunnel along the ocean shall not exceed 3%; the selection of the pipeline structure location in a geologically continuous and uniform marine area, and the location of the pipeline structure location is determined by calculating the stratum discontinuity coefficient; the stratum discontinuity coefficient refers to the calculation of the bearing layer location including sand, clay and strongly weathered soil, using the length parameter of the pipeline structure as the required range, and calculating the long-term settlement assessment parameters through numerical simulation, and taking the seabed range where the long-term settlement assessment parameters meet the construction requirements as the pipeline construction location.

[0017] The undersea tunnel is arranged in sections: a buried section, a revetment section, and an underwater section. These sections connect the islands, reefs, and breakwater foundations to the undersea utility tunnel. A combination of one-way lanes with U-turn areas and two-way lanes ensures the tunnel meets the load requirements for people, vehicles, and equipment. The tunnel employs a sloping tunnel structure. Anti-slip and anti-horizontal displacement foundations prevent the sloping tunnel from sliding down entirely, which could cause significant underwater displacement of the utility tunnel structure. The buried and revetment sections utilize anti-slip and anti-slip foundations, combining pile and crushed stone foundations. Anti-slip structures are placed on top of the piles and correspondingly at the bottom of the tunnel structure, along with embedded components, to prevent slippage and settlement. The underwater section of the undersea tunnel also uses a combination of crushed stone and pile foundations, with anchor bolts and bottom-protruding locking structures to enhance stability and prevent slippage.

[0018] The following steps outline the design and connection method for the dedicated connection structure to the subsea utility tunnel: First, a dedicated connection structure is installed at the underwater end of the subsea tunnel. The cross-section of the dedicated connection structure is identical to that of the subsea utility tunnel, but its cross-section is larger than that of the subsea utility tunnel while ensuring compliance with docking error requirements. Second, the sidewalls of the dedicated connection structure are aligned with the tunnel partition walls, and a reinforcing structure is installed between the dedicated connection structure and the tunnel outer wall to ensure reasonable and stable force transmission. Finally, the dedicated connection structure utilizes GINA and OMEGA waterstops, and incorporates OMEGA waterstop installation components to achieve the second layer of waterstop installation. The dedicated connection structure also incorporates prestressed cable anchor plates to apply prestress to the connection between the dedicated connection structure and the subsea utility tunnel, thereby enhancing the pressure of the waterstop and achieving water sealing.

[0019] The design method further includes: calculating geological reinforcement assessment parameters, designing foundation reinforcement, determining the reinforcement treatment volume for poor foundations, and using these as parameters for scheme optimization; the geological reinforcement assessment parameters are obtained by comprehensively analyzing geological conditions to determine whether reinforcement measures are needed; the assessment and reinforcement methods are as follows: first, calculating the standard deviation parameters of each soil layer; when the standard deviation difference exceeds the standard deviation difference threshold of the engineering standard, the standard deviation is used as input to assess the cost of foundation reinforcement; second, determining the foundation treatment range and reinforcement volume based on the required foundation width and depth, and treating the foundation with crushed stone; when performing mixing treatment, determining parameters including the spacing, depth, and diameter of mixing piles, and determining the total mixing pile reinforcement volume; finally, determining the location of the undersea tunnel and utility tunnel based on the reinforcement volume of each type of foundation; generally, areas with low reinforcement volume and cost are selected as the locations of the undersea tunnel and utility tunnel.

[0020] When considering the settlement resistance of subsea tunnels and subsea utility tunnels, an optimization analysis method for the integrated settlement resistance of subsea tunnels and subsea utility tunnels is presented, including: a) Data collection and preliminary calculation: Based on the preset cross-section, inclination, and geological conditions of the subsea tunnel, as well as the cross-section and geological conditions of the subsea utility tunnel structure, the self-weight and ballast load parameters of the subsea tunnel foundation and the subsea utility tunnel structure are calculated; b) Foundation load calculation: The average foundation load of the subsea tunnel and subsea utility tunnel is calculated, using the average foundation load and the foundation parameters of the subsea tunnel and subsea utility tunnel as input parameters; the foundation parameters include the self-weight, ballast load, and overall dimensions of the subsea tunnel and subsea utility tunnel; c) Using PL... The AXIS software initiates an iterative process, using the calculated settlement and horizontal slip of the submarine utility tunnel and its foundation parameters as outputs. The initial iterative settlement and horizontal slip of the submarine utility tunnel and its foundation are set to 0. e) A numerical model for settlement and horizontal displacement calculation is established based on the foundation parameters of the submarine utility tunnel and its foundation. f) A settlement and horizontal displacement calculation model for multi-layered soil is established based on soil mechanics and geotechnical engineering theories and specifications. The settlement and horizontal displacement at different locations of the submarine tunnel and utility tunnel structures are calculated, and the final settlement of the tunnel and utility tunnel is calculated. g) The current settlement and horizontal displacement of the submarine utility tunnel and its foundation are calculated. If the difference between the settlement and horizontal displacement meets a preset threshold parameter, the iteration terminates. If the requirement is not met, the foundation parameters of the submarine tunnel and the submarine utility tunnel are adjusted, and iteration c) is repeated. h) The overall dimensions of the foundation of the submarine utility tunnel and its foundation are finally determined.

[0021] The construction method includes: S100, the lower foundation construction of the subsea tunnel and subsea utility tunnel includes: excavating and piling each segment of the subsea tunnel, constructing pile foundations and caissons, pouring concrete and reinforcing the foundation; excavating and piling the subsea utility tunnel, constructing pile foundations and caissons, pouring concrete and reinforcing the foundation; S200, the segmented construction of the subsea tunnel includes: S201, the buried section of the subsea tunnel is excavated using the open-cut method, followed by foundation construction and buried section structural construction; S202, the revetment section of the subsea tunnel is constructed with underwater cofferdams, followed by the connection construction of the buried section and the revetment section; after the connection is completed, backfilling is carried out, and finally water is filled and the cofferdam is removed; S203, the buried section and the revetment section foundation... Before the foundation construction, pile foundation or anchor bolt construction is carried out for each section, and anti-slip structure construction is carried out on the top of the pile foundation. Then, the anti-slip buried structure construction of the tunnel structure is carried out, and finally the overall tunnel structure construction is carried out; S204, before the construction of the underwater section, pile foundation construction and crushed stone foundation construction are carried out, followed by underwater pouring of the anti-slip structure on the top of the pile foundation; S205, the underwater section of the subsea tunnel adopts the method of floating the installation vessel and the tunnel structure as a whole on the water, and is transported to the installation position by tugboat. Ballast well is injected with water and sunk. After sinking to the designated position, the anti-disturbance structure including boulders and torsion blocks is installed; S300, realizing the underwater installation of the subsea utility tunnel includes: installation by barge lifting and sinking method. When the subsea utility tunnel is floating in the sea, it is arranged at both ends. Two barges, moored at four points in the sea and each equipped with two winches, were used to sink the subsea utility tunnel to the foundation bed by injecting water into the sea. The connection construction of the subsea tunnel and the subsea utility tunnel, as described in S400, includes: S401, using barges to move the subsea utility tunnel on the foundation bed surface and applying a waterstop to the end face of the dedicated connection structure of the subsea tunnel to achieve initial waterstopping; S402, pumping water out of the subsea tunnel's docking cavity and using barges to continuously move the waterstop at the end face of the subsea utility tunnel to contact the docking end, applying a preset preload using continuous barge movement. This preset preload is determined by the design pressure, water pressure, construction conditions, and safety factor; S403, pumping water out of the docking cavity and using water... The pressure further tightens the waterstop; S404, after the water is pumped and tightened, the four anchor points connecting the end face of the submarine utility tunnel, including the shore-controlled winch and the ship winch, are used to continuously apply the preset pressure and fix the equipment including the shore-controlled winch and the ship winch, keeping the pressure constant to fix the submarine utility tunnel; S405, the end face of the special connection structure and the end face of the submarine utility tunnel are removed inside the submarine tunnel, and the OMEGA waterstop is installed through the embedded parts; S406, the prestressed steel cable connection of the special connection structure of the submarine utility tunnel and the submarine tunnel is installed, and the prestress is tensioned to compress the GINA waterstop to the preset amount; S407, the shear keys of the submarine utility tunnel and the special connection structure are installed to ensure the overall shear resistance of the connection between the submarine utility tunnel and the submarine tunnel;The connection construction of the S500 subsea utility tunnel and data container includes: S501, connecting the subsea utility tunnel and data container using a floating docking method, ensuring the sealing and stability of the interface using welding and bolting methods; S502, sealing the connection points to prevent the infiltration of moisture, soil, and other foreign substances; S503, transporting the container equipment, including the server cluster, ladders, and monitoring equipment, from the coastal tunnel entrance, and completing the installation of the container equipment.

[0022] The beneficial effects of this invention are:

[0023] This invention provides a method for designing and constructing a data center connecting a submarine tunnel and a submarine utility tunnel. This method has the following advantages: It provides a method for connecting a submarine tunnel and a submarine utility tunnel, and also provides a method for designing and constructing a data center based on this connection. The data center constructed using this method allows for easy transfer of personnel and materials through the connection between the submarine tunnel and the submarine utility tunnel, solving the problem of connecting submarine data centers with shore-based resources. After the utility tunnel is connected, server clusters and other equipment can be transported from the shore passage of the submarine tunnel to the submarine utility tunnel for installation, which is safer than installing equipment in advance within the utility tunnel. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the data center composition of the present invention.

[0025] Figure 2 This is a flowchart of the design method of the present invention.

[0026] Figure 3 This is a flowchart of the construction method of the present invention. Detailed Implementation

[0027] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] like Figure 1 The diagram shown is a schematic representation of the data center components of the present invention; the diagram includes: a submarine tunnel S1; a submarine utility tunnel S2; a connection structure between the submarine tunnel and the submarine utility tunnel S3; and a data container S4.

[0029] The S1 undersea tunnel is used to connect islands, reefs, and breakwaters, enabling people, vehicles, and equipment to travel from the shore to the interior of the utility tunnel structure. The undersea tunnel road can be either a one-way road with a vehicle U-turn area or a two-way road. The undersea tunnel structure can be either a reinforced concrete structure or a steel-concrete composite structure.

[0030] The submarine utility tunnel S2 is composed of box-type structures including circular and square shapes. The tunnel has openings on its sides, and is connected to the data container through flange connections. The flange connection is a mechanical method for connecting pipelines and equipment.

[0031] The connection structure S3 between the subsea tunnel and the subsea utility tunnel is achieved by a combination of flange connection, waterstop structure, prestressed cable and anchoring structure.

[0032] The S4 data cabin has an outer shell made of high-strength alloy material, which is usually spherical or cylindrical. The interior houses server clusters, data acquisition equipment, and drainage pipes.

[0033] Specifically, the data center also includes the selection of the data center's location; the location of the undersea tunnel is selected from the seabed soil layer in an area with small water depth variations as the structural connection section to the shore foundation, and the inclination angle of the tunnel along the ocean shall not exceed 3%; the location of the utility tunnel structure is selected from a geologically continuous and uniform marine area, and the site selection location of the utility tunnel structure is determined by calculating the stratum discontinuity coefficient; the stratum discontinuity coefficient refers to the calculation of the bearing layer location, including sand, clay, and strongly weathered soil, using the length parameter of the utility tunnel structure as the required range, and calculating the long-term settlement assessment parameters through numerical simulation, and taking the seabed range where the long-term settlement assessment parameters meet the construction requirements as the construction location of the utility tunnel.

[0034] It should be noted that the angle of inclination of the subsea tunnel along the ocean is directly related to the structural shape of the tunnel. If the structure of the subsea tunnel is straight, the angle of inclination can be appropriately increased due to the use of foundation structures that resist settlement and horizontal displacement, but it should not exceed 10%. If the subsea tunnel is not straight, it should be arranged in a semi-circular shape. The two ends of the semi-circular subsea tunnel are shore-based interfaces. A dedicated connecting structure should be set near the center of the semi-circular tunnel to connect with the subsea utility tunnel. Because the semi-circular subsea tunnel is more prone to overturning along the ocean, the overall angle of inclination of the semi-circular subsea tunnel along the ocean should not exceed 3% to ensure the stability of the subsea tunnel.

[0035] The subsea tunnel is divided into three sections: a buried section, a revetment section, and an underwater section. These sections connect the islands, reefs, and breakwater foundations to the subsea utility tunnel. A combination of one-way lanes with U-turn areas and two-way lanes ensures the tunnel meets the load requirements for people, vehicles, and equipment. The subsea tunnel employs a sloping tunnel structure. Anti-slip and anti-horizontal displacement foundations prevent the sloping tunnel from sliding down entirely, which could cause significant underwater displacement of the utility tunnel structure. The buried and revetment sections utilize anti-slip and anti-slip foundations, combining pile and crushed stone foundations. Anti-slip structures are placed on top of the piles and correspondingly at the bottom of the tunnel structure, along with embedded components, to prevent slippage and settlement. The underwater section of the subsea tunnel also uses a combination of crushed stone and pile foundations, with anchor bolts and bottom-protruding locking structures to enhance stability and prevent slippage.

[0036] The following steps outline the design and connection method for the dedicated connection structure to the subsea utility tunnel: First, a dedicated connection structure is installed at the underwater end of the subsea tunnel. The cross-section of the dedicated connection structure is identical to that of the subsea utility tunnel, but its cross-section is larger than that of the subsea utility tunnel while ensuring compliance with docking error requirements. Second, the sidewalls of the dedicated connection structure are aligned with the tunnel partition walls, and a reinforcing structure is installed between the dedicated connection structure and the tunnel outer wall to ensure reasonable and stable force transmission. Finally, the dedicated connection structure utilizes GINA and OMEGA waterstops, and incorporates OMEGA waterstop installation components to achieve the second layer of waterstop installation. The dedicated connection structure also incorporates prestressed cable anchor plates to apply prestress to the connection between the dedicated connection structure and the subsea utility tunnel, thereby enhancing the pressure of the waterstop and achieving water sealing.

[0037] like Figure 2 The diagram shown is a flowchart of the design method of this invention. The flowchart includes: S10, the undersea tunnel connects the island reefs and breakwater foundations with the undersea utility tunnel, and adopts either a one-way road + vehicle U-turn area or a two-way road to ensure that the undersea tunnel meets the load requirements of people and vehicles, and realizes the transfer function of people, vehicles and equipment; after the substructure construction, either reinforced concrete structure or steel-concrete composite structure is used as the material structure of the undersea tunnel, and the tunnel layout is divided into buried section, revetment section and underwater section. Anti-settlement and horizontal displacement foundation structures are used in each section to achieve the stability of the undersea tunnel under stress and deformation under marine environment and seismic action; a special connection structure is arranged at the underwater end of the undersea tunnel to connect with the cross section of the undersea utility tunnel. The design requires that the cross section of the special connection structure is consistent with the cross section of the undersea utility tunnel, and the diameter of the cross section of the special connection structure is larger than that of the undersea utility tunnel while meeting the docking error requirements;

[0038] S20. Through the construction of the subsea utility tunnel's lower foundation and the reinforcement of the subsea utility tunnel after its connection with the subsea tunnel, the overall structure of the subsea utility tunnel is stabilized under stress and deformation under marine environment and seismic action. On the basis of overall structural stability, the purpose of achieving all structural design functions of internal vehicle passage, pipeline passage, ventilation, lighting, and ladder design required for personnel to go up and down is realized; S30. After connecting the subsea tunnel and the subsea utility tunnel, multiple data cabins are connected to the side of the subsea utility tunnel through flange connection.

[0039] PLAXIS software was used to calculate marine geological reinforcement assessment parameters, design foundation reinforcement, and determine the reinforcement treatment volume for poor foundations, which served as parameters for scheme optimization. The geological reinforcement assessment parameters were obtained through comprehensive analysis of geological conditions to determine whether reinforcement measures were necessary. The assessment and reinforcement methods were as follows: First, the standard deviation parameters of each soil layer were calculated. When the standard deviation difference exceeded the standard deviation difference threshold of the engineering standard, the standard deviation was used as input to assess the cost of foundation reinforcement. Second, the foundation treatment range and reinforcement volume were determined based on the required foundation width and depth, and the foundation was treated with crushed stone. When mixing treatment was performed, parameters including the spacing, depth, and diameter of the mixing piles were determined, and the total mixing pile reinforcement volume was determined. Finally, based on the reinforcement volume of each type of foundation, the location of the subsea tunnel and utility tunnel was determined. Generally, areas with low reinforcement volume and cost were selected as the locations for the subsea tunnel and utility tunnel.

[0040] When considering the settlement resistance of subsea tunnels and subsea utility tunnels, an optimization analysis method for the integrated settlement resistance of subsea tunnels and subsea utility tunnels is presented, including: a) Data collection and preliminary calculation: Based on the preset cross-section, inclination, and geological conditions of the subsea tunnel, as well as the cross-section and geological conditions of the subsea utility tunnel structure, the self-weight and ballast load parameters of the subsea tunnel foundation and the subsea utility tunnel structure are calculated; b) Foundation load calculation: The average foundation load of the subsea tunnel and subsea utility tunnel is calculated, using the average foundation load and the foundation parameters of the subsea tunnel and subsea utility tunnel as input parameters; the foundation parameters include the self-weight, ballast load, and overall dimensions of the subsea tunnel and subsea utility tunnel; c) Using PL... The AXIS software initiates an iterative process, using the calculated settlement and horizontal slip of the submarine utility tunnel and its foundation parameters as outputs. The initial iterative settlement and horizontal slip of the submarine utility tunnel and its foundation are set to 0. e) A numerical model for settlement and horizontal displacement calculation is established based on the foundation parameters of the submarine utility tunnel and its foundation. f) A settlement and horizontal displacement calculation model for multi-layered soil is established based on soil mechanics and geotechnical engineering theories and specifications. The settlement and horizontal displacement at different locations of the submarine tunnel and utility tunnel structures are calculated, and the final settlement of the tunnel and utility tunnel is calculated. g) The current settlement and horizontal displacement of the submarine utility tunnel and its foundation are calculated. If the difference between the settlement and horizontal displacement meets a preset threshold parameter, the iteration terminates. If the requirement is not met, the foundation parameters of the submarine tunnel and the submarine utility tunnel are adjusted, and iteration c) is repeated. h) The overall dimensions of the foundation of the submarine utility tunnel and its foundation are finally determined.

[0041] like Figure 3 The diagram shown is a flowchart of the construction method of the present invention; the flowchart includes: S100, construction of the lower foundation of the submarine tunnel and submarine utility tunnel; S200, segmented construction of the submarine tunnel; S300, installation of the submarine utility tunnel in the sea; S400, connection construction of the submarine tunnel and submarine utility tunnel; S500, connection construction of the submarine utility tunnel and data container.

[0042] Among them, S100, the construction of the subgrade foundations for the submarine tunnel and submarine utility tunnel includes: excavation and piling, construction of pile foundations and caissons, pouring of concrete and foundation reinforcement for each section of the submarine tunnel; and excavation and piling, construction of pile foundations and caissons, pouring of concrete and foundation reinforcement for the submarine utility tunnel.

[0043] S200. The segmented construction of the undersea tunnel includes: S201. The buried section of the undersea tunnel is excavated using the open-cut method, followed by foundation construction and the construction of the buried section structure; S202. The revetment section of the undersea tunnel is constructed with underwater cofferdams, followed by the connection construction of the buried section and the revetment section; after the connection is completed, backfilling is carried out, and finally water is injected and the cofferdam is removed; S203. Before the foundation construction of the buried section and the revetment section, pile foundations or anchor bolts are constructed for each section, and anti-slip structures are constructed on the top of the pile foundations, followed by the construction of the anti-slip buried structure of the tunnel structure, and finally the overall construction of the tunnel structure; S204. Before the construction of the underwater section, pile foundation construction and crushed stone foundation construction are carried out, followed by underwater pouring of the anti-slip structure on the top of the pile foundations; S205. The underwater section of the undersea tunnel is transported by an installation vessel and the tunnel structure as a whole on the water, using tugboats to transport it to the installation position, ballast wells are injected with water and sunk, and after sinking to the designated position, the anti-disturbance structure including boulders and torsion blocks is installed.

[0044] S300. The underwater installation of the subsea utility tunnel includes: installation using the barge sinking method. When the subsea utility tunnel is floating in the sea, two barges are arranged at both ends. The barges are moored at four points in the sea, and two winches are arranged at each point to sink the subsea utility tunnel to the foundation bed by injecting water into the sea.

[0045] S400. The connection construction of the subsea tunnel and subsea utility tunnel includes: S401. Using a barge to move the subsea utility tunnel on the foundation surface, and pressing the waterstop onto the end face of the special connection structure of the subsea tunnel to achieve initial waterstopping; S402. Dewatering the subsea tunnel connection cavity, and using the barge to continuously move the waterstop at the end face of the subsea utility tunnel to contact the connection end of the subsea tunnel, applying a preset preload using the barge's continuous movement. The preset preload is determined by the design pressure, water pressure, construction conditions, and safety factor; S403. Dewatering the cavity at the connection end, and using water pressure to further tighten the waterstop; S404. Dewatering and tightening completed. Then, using four anchor points connected to the end face of the subsea utility tunnel, including shore-controlled winches and ship winches, a preset pressure is continuously applied, and the equipment including shore-controlled winches and ship winches is fixed to maintain constant pressure and secure the subsea utility tunnel; S405, the end face of the special connection structure and the end face of the subsea utility tunnel are removed inside the subsea tunnel, and the OMEGA waterstop is installed through embedded parts; S406, the prestressed steel cable connection of the special connection structure of the subsea utility tunnel and the subsea tunnel is installed, and the prestress is tensioned to compress the GINA waterstop to the preset amount; S407, the shear keys of the subsea utility tunnel and the special connection structure are installed to ensure the overall shear resistance of the connection between the subsea utility tunnel and the subsea tunnel.

[0046] S500. The connection construction between the subsea utility tunnel and the data container includes: S501. Connecting the subsea utility tunnel and the data container using a floating docking method, using methods including welding and bolting to ensure the sealing and stability of the interface; S502. Sealing the connection points to prevent the infiltration of moisture, soil, and other foreign substances; S503. Transporting the container equipment, including server clusters, ladders, and monitoring equipment, from the coastal tunnel entrance, and completing the installation of the container equipment.

[0047] In the above embodiments, preferably, the data center composed of the submarine tunnel, submarine utility tunnel, and data container of the present invention allows vehicles, personnel, and related equipment to be transported to the seabed via elevator through the shore-based entrance of the submarine tunnel. Then, server clusters and other equipment are transported to the data container via the submarine utility tunnel through the docking channel. During the operation of the data container, staff can enter the seabed data container at any time from the shore-based submarine tunnel entrance to confirm its normal operation. Therefore, the present invention establishes a connection from the coast to the seabed data container through the connection of the submarine tunnel and submarine utility tunnel, realizing the connection between the seabed data center and shore-based resources, making equipment transportation, personnel transfer, and equipment maintenance of the seabed data container more convenient.

Claims

1. A data center connecting an undersea tunnel and an undersea utility tunnel, characterized in that, include: Subsea Tunnel S1; Submarine utility tunnel S2; S3 is the connection structure between the subsea tunnel and the subsea utility tunnel. Data container S4; The undersea tunnel S1 includes: a structure for connecting islands, reefs and breakwaters, enabling people, vehicles and equipment to access the interior of the utility tunnel from the shore; the undersea tunnel S1 road adopts either a one-way road with a vehicle U-turn area or a two-way road; the undersea tunnel structure adopts either a reinforced concrete structure or a steel-concrete composite structure. The subsea utility tunnel S2 comprises a box-type structure consisting of circular and square components, with openings on the sides. The tunnel is connected to the data container via flange connections. The flange connection is a mechanical method for connecting pipes and equipment. The connection structure S3 between the submarine tunnel and the submarine utility tunnel includes: the connection is achieved by a combination of flange connection, waterstop structure, prestressed cable and anchoring structure. The data container S4 includes: the outer shell of the data container is made of high-strength alloy material, and the outer shell is usually spherical or cylindrical, and the interior houses server clusters, data acquisition equipment and drainage pipes.

2. A data center connecting an undersea tunnel and an undersea utility tunnel according to claim 1, characterized in that, The data center also includes: location selection; wherein, the location of the undersea tunnel is selected from the seabed soil layer in an area with small water depth variation as the structural connection section to the shore foundation; the location of the utility tunnel structure is selected from a geologically continuous and uniform marine area, and the site selection location of the utility tunnel structure is determined by calculating the stratum discontinuity coefficient; the stratum discontinuity coefficient refers to the calculation of the bearing layer location including sand, clay and strongly weathered soil, using the length parameter of the utility tunnel structure as the required range, and calculating the long-term settlement assessment parameters through numerical simulation, and taking the seabed range where the long-term settlement assessment parameters meet the construction requirements as the construction location of the utility tunnel.

3. A data center connecting an undersea tunnel and an undersea utility tunnel according to claim 1, characterized in that, The undersea tunnel is arranged in sections, including a buried section, a revetment section, and an underwater section. These sections connect the islands, reefs, and breakwater foundations to the undersea utility tunnel. The tunnel utilizes either a one-way road with a U-turn area or a two-way road to meet the load requirements for people, vehicles, and equipment. The tunnel employs a sloping tunnel structure and uses anti-slip and anti-horizontal displacement foundations to prevent overall slippage and significant underwater displacement of the utility tunnel structure. The buried and revetment sections of the undersea tunnel are equipped with anti-slip and anti-slip foundations, using a combination of pile and crushed stone foundations. Anti-slip structures are placed on top of the piles and correspondingly at the bottom of the tunnel structure, along with buried components, to prevent slippage and settlement. The underwater section of the subsea tunnel is equipped with anti-settlement and anti-slip foundations, using a combination of crushed stone foundations and pile foundations, while using anchor bolts and bottom protruding snap-fit ​​structures to enhance stability and achieve anti-slip treatment in the underwater section.

4. A data center connecting an undersea tunnel and an undersea utility tunnel according to claim 1, characterized in that, The subsea tunnel also includes: a dedicated connection structure and connection method for connecting with the subsea utility tunnel; firstly, a dedicated connection structure is arranged at the underwater end of the subsea tunnel, with the cross-section of the dedicated connection structure consistent with the cross-section of the subsea utility tunnel, and the cross-section of the dedicated connection structure is larger than that of the subsea utility tunnel while ensuring that the docking error requirements are met; secondly, the sidewall of the dedicated connection structure is aligned with the tunnel partition wall, and a reinforcing structure is arranged between the dedicated connection structure and the tunnel outer wall to ensure reasonable force transmission and stable transition of force transmission; finally, the dedicated connection structure adopts GINA waterstop and OMEGA waterstop, and has built-in OMEGA waterstop installation components to realize the installation and connection of the second waterstop; the dedicated connection structure has built-in prestressed cable anchor plates to realize the connection between the dedicated connection structure and the subsea utility tunnel to apply prestress, thereby achieving the purpose of increasing the pressure of the waterstop and stopping water.

5. The design method for a data center connecting an undersea tunnel and an undersea utility tunnel according to claim 1, characterized in that, The design method includes: S10, the undersea tunnel will connect the islands, reefs, and breakwater foundations with the undersea utility tunnel. It will utilize either a one-way road with a vehicle U-turn area or a two-way road to meet the load requirements for people and vehicles, and facilitate the transfer of people, vehicles, and equipment. After the substructure construction, either reinforced concrete or steel-concrete composite structures will be used as the tunnel's construction materials. The tunnel will be divided into a buried section, a revetment section, and an underwater section. Each section will use foundation structures resistant to settlement and horizontal displacement to ensure the undersea tunnel's stability under marine conditions and seismic activity. A dedicated connecting structure will be installed at the underwater end of the undersea tunnel to connect with the undersea utility tunnel cross-section. The design requires that the cross-section of the dedicated connecting structure be consistent with the cross-section of the undersea utility tunnel, and, while meeting the docking error requirements, the diameter of the dedicated connecting structure cross-section should be larger than that of the undersea utility tunnel cross-section. S20. Through the construction of the subsea utility tunnel's lower foundation and the reinforcement of the subsea utility tunnel after its connection with the subsea tunnel, the overall structure of the subsea utility tunnel is stabilized under stress and deformation in the marine environment and under seismic action. On the basis of overall structural stability, the purpose is to realize all structural design functions of the internal vehicle passage, pipeline passage, ventilation, lighting, and ladders required for personnel to go up and down. S30. After connecting the submarine tunnel and the submarine utility tunnel, multiple data cabins are connected to the side of the submarine utility tunnel via flange connections.

6. The design method for a data center connecting an undersea tunnel and an undersea utility tunnel according to claim 5, characterized in that, The design method further includes: calculating geological reinforcement assessment parameters, designing foundation reinforcement, determining the reinforcement treatment volume for poor foundations, and using these as parameters for scheme optimization; the geological reinforcement assessment parameters are obtained by comprehensively analyzing geological conditions to determine whether reinforcement measures are needed; the assessment and reinforcement methods are as follows: first, calculating the standard deviation parameters of each soil layer; when the standard deviation difference exceeds the standard deviation difference threshold of the engineering standard, the standard deviation is used as input to assess the cost of foundation reinforcement; second, determining the foundation treatment range and reinforcement volume based on the required foundation width and depth, and treating the foundation with crushed stone; when performing mixing treatment, determining parameters including the spacing, depth, and diameter of mixing piles, and determining the total mixing pile reinforcement volume; finally, determining the location of the undersea tunnel and utility tunnel based on the reinforcement volume of each type of foundation; generally, areas with low reinforcement volume and cost are selected as the locations of the undersea tunnel and utility tunnel.

7. The design method for a data center connecting an undersea tunnel and an undersea utility tunnel according to claim 5, characterized in that, The design method further includes: considering the settlement resistance of the subsea tunnel and subsea utility tunnel, and providing an optimization analysis method for the integrated settlement resistance of the subsea tunnel and subsea utility tunnel, including: a) data collection and preliminary calculation, calculating the self-weight and ballast load parameters of the subsea tunnel foundation and the subsea utility tunnel structure based on the preset subsea tunnel cross-section, inclination, and geological conditions; b) foundation load calculation, calculating the average foundation load of the subsea tunnel and subsea utility tunnel, using the average foundation load and foundation parameters of the subsea tunnel and subsea utility tunnel as input parameters; the foundation parameters include the self-weight, ballast load, and overall dimensions of the subsea tunnel and subsea utility tunnel; c) iterative process initiation, using the calculated settlement of the subsea utility tunnel and subsea utility tunnel foundation parameters, the subsea tunnel... The iteration begins with the horizontal slippage of the pipeline as the output, and the initial iterative settlement and horizontal slippage of the submarine utility tunnel and submarine tunnel foundations are set to 0; e) A numerical model for settlement and horizontal displacement calculation is established based on the foundation parameters of the submarine utility tunnel and submarine tunnel; f) A settlement and horizontal displacement calculation model for multi-layered soil is established based on the theoretical specifications of soil mechanics and geotechnical engineering, and the settlement and horizontal displacement at different locations of the submarine tunnel and utility tunnel structures are calculated respectively, and the final settlement of the tunnel and utility tunnel is calculated; g) The settlement and horizontal displacement of the submarine utility tunnel structure and submarine tunnel foundation are calculated. When the difference between the settlement and horizontal displacement of the two meets the preset threshold parameter, the iteration is terminated; if the requirement is not met, the foundation parameters of the submarine tunnel and submarine utility tunnel are adjusted, and c) iteration is repeated; h) The overall dimensions of the submarine utility tunnel and submarine tunnel foundations are finally determined.

8. A method for constructing a data center connecting an undersea tunnel and an undersea utility tunnel according to claim 1, characterized in that, The construction method includes: S100: Construction of the lower foundations for the submarine tunnel and submarine utility tunnel; S200: Segmented construction of the submarine tunnel; S300: Installation of the submarine utility tunnel in the sea; S400: Connection construction of the submarine tunnel and submarine utility tunnel; S500: Connection construction of the submarine utility tunnel and data container.

9. A method for constructing a data center connecting an undersea tunnel and an undersea utility tunnel according to claim 8, characterized in that, The construction method includes: S100, the lower foundation construction of the submarine tunnel and submarine utility tunnel includes: excavating and piling, constructing pile foundations and caissons, pouring concrete and reinforcing the foundations for each segment of the submarine tunnel; excavating and piling, constructing pile foundations and caissons, pouring concrete and reinforcing the foundations for the submarine utility tunnel; S200, the segmented construction of the submarine tunnel includes: S201, the buried section of the submarine tunnel is excavated using the open-cut method, followed by foundation construction and buried section structural construction; S202, the revetment section of the submarine tunnel is constructed with underwater cofferdams, followed by the connection construction of the buried section and the revetment section; after the connection is completed, backfilling is carried out, and finally water is poured and the tunnel is dismantled. In addition to the cofferdam; S203, before the foundation construction of the buried section and the revetment section, the pile foundation or anchor bolt construction of each section is carried out, and the anti-slip structure construction is carried out on the top of the pile foundation, followed by the construction of the anti-slip buried structure of the tunnel structure, and finally the overall construction of the tunnel structure; S204, before the construction of the underwater section, the pile foundation construction and crushed stone foundation construction are carried out, followed by the underwater pouring of the anti-slip structure on the top of the pile foundation; S205, the underwater section of the submarine tunnel adopts the method of floating the installation vessel and the tunnel structure as a whole on the water, and uses tugboats to transport it to the installation position, the ballast well is injected with water and sunk, and after sinking to the designated position, the anti-disturbance structure including boulders and torsion blocks is installed; S300, the underwater installation of the submarine utility tunnel is realized. The installation includes: using a barge sinking method, where two barges are positioned at both ends while the subsea utility tunnel floats in the sea. The barges are moored at four points in the sea, each equipped with two winches, to sink the subsea utility tunnel to the foundation bed by injecting water into the sea. The connection construction of the subsea tunnel and the subsea utility tunnel, as described in S400, includes: S401, using barges to move the subsea utility tunnel on the foundation bed surface, and applying a waterstop to the end face of the special connection structure of the subsea tunnel to achieve initial waterstopping; S402, pumping water out of the subsea tunnel's docking cavity, and using continuous barge movement to bring the waterstop on the end face of the subsea utility tunnel into contact with the docking end of the subsea tunnel. Continuous barge movement is used to apply a preset preload, the preset preload... The pressure load is determined by the design pressure, water pressure, construction conditions, and safety factor; S403, pump water out of the cavity at the docking end to further tighten the waterstop using water pressure; S404, after pumping and tightening, use the four anchor points connecting the end face of the submarine utility tunnel, including shore-controlled winches and ship winches, to continuously apply the preset pressure and fix the equipment including shore-controlled winches and ship winches, keeping the pressure constant to fix the submarine utility tunnel; S405, remove the end face of the special connection structure and the end face of the submarine utility tunnel inside the submarine tunnel, and install the OMEGA waterstop through embedded parts; S406, install the prestressed steel cable connection of the special connection structure of the submarine utility tunnel and the submarine tunnel, and tension the prestress to compress the OMEGA waterstop to the preset amount; S407, install the shear key of the submarine utility tunnel and the special connection structure to ensure the overall shear resistance of the connection between the submarine utility tunnel and the submarine tunnel;The connection construction of the S500 subsea utility tunnel and data container includes: S501, connecting the subsea utility tunnel and data container using a floating docking method, ensuring the sealing and stability of the interface using welding and bolting methods; S502, sealing the connection points to prevent the infiltration of moisture, soil, and other foreign substances; S503, transporting the container equipment, including the server cluster, ladders, and monitoring equipment, from the coastal tunnel entrance, and completing the installation of the container equipment.

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