Radiation type cave depot type data center and construction method thereof

Abstract

The invention discloses a radiation type cave depot type data center and a construction method thereof, and belongs to the technical field of cave depot type data centers. The data center comprises a mountain, a vertical shaft exhaust system, a bottom layer data tunnel group and a plurality of upper layer data tunnel groups, the vertical shaft exhaust system, the bottom layer data tunnel group and the upper layer data tunnel groups are arranged in the mountain, one end of the vertical shaft exhaust system is communicated with the surface of the mountain, and the upper layer data tunnel groups are located on the upper side of the bottom layer data tunnel group. One ends of all the data tunnels in the upper-layer data tunnel group and one ends of all the data tunnels in the bottom-layer data tunnel group are connected with the vertical shaft exhaust system, and the other ends of all the data tunnels in the upper-layer data tunnel group and the other ends of all the data tunnels in the bottom-layer data tunnel group extend in different directions with the vertical shaft exhaust system as the center till the other ends are communicated with the surface of the mountain. The data tunnels are arranged in a layered and radiation mode, so that all the data tunnels in the whole data center can meet the air and smoke exhausting requirements only through one vertical shaft air exhausting system, the number of the data tunnels in the data center is obviously increased, and meanwhile the engineering investment of the data center is reduced.

Description

Technical Field

[0001] The invention relates to a radiation cavern-type data center and a construction method thereof, belonging to the technical field of cavern-type data centers. Background Art

[0002] Because it is buried underground, cavern-type data centers have the typical advantages of high security, high concealment, high protection, and high energy efficiency, and thus become a new direction for the development of data centers. However, considering the relative closedness of the cavern-type data center structure, it is necessary to focus on the ventilation in daily operation and the smoke exhaust requirements in fire accidents.

[0003] For example, the Chinese patent document with publication number CN116648044A discloses an explosion-proof transverse ventilation system and construction method suitable for cave-type data centers. The explosion-proof transverse ventilation system includes an upper transverse exhaust structure, a middle-layer communication structure, and a lower cave-type data center main structure, which are three-dimensionally crossed in upper, middle, and lower layers. The upper transverse exhaust structure, the middle-layer communication structure, and the lower cave-type data center main structure are all multi-channel structures. The air inlet port of the lower cave-type data center main structure is connected to the integrated air supply system, and the air outlet port is interconnected with the upper transverse exhaust structure through the middle-layer communication structure. It can realize remote and precise control of the wind flow inside the data center, and provide a reliable ventilation system for normal ventilation in the operating state and fire fighting in fire accidents.

[0004] However, in this explosion-proof horizontal ventilation system, due to the limitation of the layout of the data center caverns, one connecting shaft can meet the exhaust needs of four data center caverns at most. When the number of data center caverns increases, the number of connecting shafts needs to be increased accordingly. However, due to the difficulty and high construction cost of the connecting shafts, the increase in their number will inevitably cause a significant increase in the engineering investment of the entire cave-type data center. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a radial cave-type data center and a construction method thereof.

[0006] The present invention is achieved through the following technical solutions: A radial cave-type data center comprises a mountain and a vertical shaft exhaust system arranged in the mountain, a bottom data tunnel group and a plurality of upper data tunnel groups, one end of the vertical shaft exhaust system is connected to the surface of the mountain, the upper data tunnel group is located on the upper side of the bottom data tunnel group, one end of all data tunnels in the upper data tunnel group and one end of all data tunnels in the bottom data tunnel group are connected to the vertical shaft exhaust system, and the other ends extend in different directions with the vertical shaft exhaust system as the center until they are connected to the surface of the mountain.

[0007] The shaft exhaust system comprises a ventilation hub cavern A and an exhaust shaft, and the exhaust shaft is connected to the ventilation hub cavern A and the top of the mountain.

[0008] The ventilation hub cavern A includes a cavern support structure, a gas replenishment pipeline and an air duct. An equipment bin is provided at the top of the inner side of the cavern support structure, and a fire extinguishing gas storage bin is provided at the bottom of the inner side of the cavern support structure. One end of the gas replenishment pipeline is connected to the fire extinguishing gas storage bin, and the other end extends to the outside of the mountain, and a gas pipeline switch is provided at this end. The air duct is located on the inner side of the cavern support structure, and its lower end is connected to the top plate of the fire extinguishing gas storage bin, and its upper end extends into the equipment bin.

[0009] The cavern support structure is in an ellipsoidal spherical shape, and comprises an initial support layer and a secondary lining layer arranged inside the initial support layer. The initial support layer is an ellipsoidal spherical steel arch structure.

[0010] The fire extinguishing gas storage bin is provided with non-flammable gas nitrogen, argon or IG541 mixed gas.

[0011] The exhaust shaft includes a centralized air duct section and a decentralized exhaust structure. The lower part of the centralized air duct section is connected to the top of the cavern support structure, and the lower end of the centralized air duct section extends into the equipment bin and is connected to the upper end of the air duct through an axial flow fan. The decentralized exhaust structure is connected to the upper end of the centralized air duct section and communicates with the top of the mountain.

[0012] A polygonal steel frame is provided on the initial supporting layer at the connection between the initial supporting layer and the centralized air duct section, and an inscribed circular steel beam A is provided on the inner side of the polygonal steel frame.

[0013] The decentralized exhaust structure includes an explosion-proof panel, a backfill covering layer and a plurality of zigzag air ducts. The explosion-proof panel is arranged inside the mountain and is located directly above the centralized air duct section, and the buried depth of the explosion-proof panel inside the mountain is not less than 5m. The backfill covering layer is arranged on the explosion-proof panel. One ends of the plurality of zigzag air ducts are connected to the upper end of the centralized air duct section, and the other ends are exposed at the top of the mountain as exhaust outlets, and are irregularly distributed around the centralized air duct section. Trees are planted around the zigzag air ducts on the top of the mountain.

[0014] One end of all data tunnels in the bottom data tunnel group is connected to the ventilation hub cavern A; The data tunnels are of two types: through-type data tunnels and intermittent data tunnels. The bottom data tunnel group includes two through-type data tunnels and several intermittent data tunnels. The two through-type data tunnels are arranged along the same straight line and horizontally along the mountain. The ends of the two through-type data tunnels that are close to each other are connected to the cavern support structure, and a fireproof isolation door is provided at the connection between the through-type data tunnel and the cavern support structure. One end of the several intermittent data tunnels is connected to the cavern support structure through a ventilation cross tunnel, and the connection between the ventilation cross tunnel and the cavern support structure is located between the equipment warehouse and the fire extinguishing gas storage warehouse, and fireproof isolation doors are provided at both ends of the ventilation cross tunnel.

[0015] The length of the ventilation tunnel is between 10m and 20m, and the cross-sectional area is 10m 2 ~15m 2 between.

[0016] A diamond-shaped steel frame is provided on the initial support layer at the connection between the initial support layer and the ventilation cross hole, and an inscribed circular steel beam B is provided on the inner side of the diamond-shaped steel frame; The fireproof isolation door at the connection between the through-type data tunnel and the cavern support structure includes two large doors and two small doors. The two large doors are used to close the ends of the through-type data tunnel, and a circular through hole is commonly provided at the closing seam of the two large doors. The circular through hole is arranged at the same elevation as the ventilation cross hole, and the diameter of the circular through hole is consistent with the inner diameter of the ventilation cross hole. The two small doors are arranged at the circular through hole and close it.

[0017] The air guide pipe is provided with air inlets at positions corresponding to the ventilation horizontal holes and the circular through holes, and air doors are provided at the air inlets; The shape and size of the outer wall of the air guide pipe located between the top of the air inlet and the fire extinguishing gas storage bin gradually expand from top to bottom.

[0018] The through-type data tunnel and the intermittent data tunnel both include a data cavern, an upper air duct is provided at the top of the inner side of the data cavern, a lower air duct is provided at the bottom, and side air ducts are provided on the left and right sides. An air-conditioning temperature control room and an equipment storage room are provided in the space enclosed by the upper air duct, the lower air duct and the side air duct. An air-conditioning temperature control room is provided with an air-conditioning unit and is arranged at one end of the data cavern away from the ventilation hub cavern A. IT equipment is provided in the equipment storage room; One end of the upper air duct is connected to the air conditioning unit in the air conditioning temperature control room, and the end is provided with an outer end pipe switch A and a suction fan A, and the other end is connected to the air guide pipe through a ventilation pipe, and the end is provided with an inner end pipe switch A and a suction fan B; One end of the lower air duct is connected to the air conditioning unit in the air conditioning temperature control room, and the end is provided with an outer end pipe switch B and an exhaust fan A, and the other end is connected to the fire extinguishing gas storage bin through a buried pipe, and the end is provided with an inner end pipe switch B and an exhaust fan B; One end of the side air duct is connected to the outside of the mountain, and is provided with an external end pipe switch C and an air filter, and the other end is connected to an end surface of the data cavern close to the ventilation hub cavern A; The side walls of the upper air duct, the lower air duct and the side air duct are all provided with a plurality of ventilation holes which are connected with the equipment storage chamber.

[0019] An explosion-proof isolation door is provided at one end of the data cavern away from the ventilation hub cavern A, and a fireproof isolation door is provided between the air-conditioning temperature control room and the equipment storage room; The equipment storage room is provided with two rows of IT equipment, and an aisle is provided between the two rows of IT equipment.

[0020] The centralized air duct section is provided with a number of ventilation hub caverns B at positions corresponding one to one to a number of upper data tunnel groups, and an anti-fall net is provided within 1m below each ventilation hub cavern B in the centralized air duct section, and an axial flow fan is provided on the upper side of each ventilation hub cavern B.

[0021] A steel arch frame is provided in the ventilation hub cavern B, and the steel arch frame includes a plurality of coaxially arranged annular arch frames, and the plurality of annular arch frames are connected together by a plurality of vertical connecting arch frames.

[0022] The upper data tunnel group includes a plurality of intermittent data tunnels, one end of each of which is connected to the ventilation hub cavern B and the steel arch frame through ventilation cross tunnels, and a diamond-shaped reinforcement arch frame is provided on the steel arch frame on the outer side of the ventilation cross tunnel; One end of the lower air ducts in the plurality of intermittent data tunnels close to the ventilation hub cavern B is connected to the fire extinguishing gas storage bin through a fire extinguishing gas delivery pipe.

[0023] When the data tunnel runs in temperature control mode, the air conditioning unit in the air conditioning temperature control room is started, the outer end pipe switch A and the suction fan A at one end of the upper air duct are turned on, and the inner end pipe switch A and the suction fan B at the other end of the upper air duct are turned off, the outer end pipe switch B and the exhaust fan A at one end of the lower air duct are turned on, and the inner end pipe switch B and the exhaust fan B at the other end of the lower air duct are turned off; After the hot air in the upper air duct enters the air-conditioning unit, it is cooled by the air-conditioning unit to form cold air, and the cold air is sent into the equipment storage room through the lower air duct. The cold air takes away the heat generated by the IT equipment and forms hot air to enter the upper air duct. This cycle is repeated to achieve the purpose of temperature control inside the equipment storage room.

[0024] When the data tunnel is in ventilation mode, open the external end pipe switch C, the two small doors or the fireproof isolation doors at both ends of the ventilation tunnel, and the axial flow fan; The air outside the mountain flows through the air filter and enters the side air duct, then diffuses into the equipment storage room, and then enters the shaft exhaust system through the circular through holes or ventilation holes at the installation locations of the two small doors, and finally is discharged to the top of the mountain through the shaft exhaust system, thereby replacing the air in the equipment storage room.

[0025] Among all the data tunnels in the bottom layer data tunnel group, only one data tunnel is allowed to run the air exchange mode at the same time, and among all the data tunnels in the same upper layer data tunnel group, only one data tunnel is allowed to run the air exchange mode at the same time.

[0026] When the data tunnel runs the fire smoke exhaust mode, first open the inner end pipe switch B and exhaust fan B at one end of the lower air duct, and close the outer end pipe switch B and exhaust fan A at the other end of the lower air duct; The non-flammable gas in the fire extinguishing gas storage bin enters the lower air duct through a concealed pipe or a fire extinguishing gas delivery pipe, and then enters the equipment storage room from the lower air duct to extinguish the fire. Next, open the inner end pipe switch A and the suction fan B at one end of the upper air duct, close the outer end pipe switch A and the suction fan A at the other end of the upper air duct, and start the axial flow fan. The smoke generated during the fire extinguishing process flows through the upper air duct and the ventilation pipe in turn and enters the vertical shaft exhaust system, and is finally discharged to the top of the mountain through the vertical shaft exhaust system.

[0027] A construction method for a radial cavernous data center comprises the following steps: Step 1: Use the partial excavation method to simultaneously construct two through-type data tunnels in the bottom data tunnel group in a double-headed excavation mode until the excavation reaches the area where the ventilation hub cavern A is located; Step 2: With the help of the two through-type data tunnels that have been constructed, the spherical excavation and reserved core soil method is used to construct the ventilation hub cavern A, and the initial support layer of the cavern support structure is constructed, as well as the polygonal steel frame, inscribed circular steel beam A, diamond steel frame and inscribed circular steel beam B; Step 3: Use the interval skipping construction process to excavate multiple ventilation cross tunnels in the bottom data tunnel group starting from the ventilation hub cavern A, and then carry out the pouring construction of the secondary lining layer of the cavern support structure; Step 4: Use the interval skipping construction process to carry out single-head excavation construction of the intermittent data tunnel in the bottom data tunnel group from the outside of the mountain until the intermittent data tunnel is connected with the corresponding ventilation cross tunnel in the bottom data tunnel group; Step 5: In synchronization with step 4, the exhaust shaft is constructed by using the reverse well method, and the two through-type data tunnels that have been connected are used as slag discharge channels; Step 6: When the exhaust shaft is constructed from top to bottom to the top elevation of a certain upper data tunnel group in step 5, the corresponding ventilation hub cavern B is expanded and excavated, and steel arch frames and diamond-shaped reinforced arch frames are constructed downward in sections; Then, the intermittent skipping construction process is adopted to carry out the excavation and initial support construction of the ventilation cross tunnel in the upper data tunnel group, and the secondary lining of the ventilation hub cavern B and the ventilation cross tunnel is cast as a whole; After the construction of the intermittent data tunnel in the bottom data tunnel group is completed, the intermittent data tunnel in the upper data tunnel group is constructed by single-head excavation from the outside of the mountain using an interval-jumping construction procedure until the intermittent data tunnel is connected with the corresponding ventilation cross tunnel in the upper data tunnel group; Step 7: Repeat step 6 to complete the construction of the remaining upper data tunnel groups one by one from top to bottom until the exhaust shaft is connected with the ventilation hub cavern A; Step 8. After the civil construction of the data center is completed, use the two through-type data tunnels as transportation channels to first carry out the internal structure construction and equipment installation of the ventilation hub cavern A and the exhaust shaft, and then carry out the internal structure construction and equipment installation of each data tunnel.

[0028] The specific construction process of step 2 includes the following steps: Step A: During the excavation of the ventilation hub cavern A, the rock pillar located directly below the exhaust shaft is retained as a temporary support structure, and then the arc-shaped side parts around the rock pillar are excavated in steps to form an arc-shaped excavation surface, and the arc-shaped excavation surface is sprayed with concrete for protection; Step B: After the excavation of the arc-shaped side of the upper step of the ventilation hub cavern A is completed, the polygonal steel frame and the inscribed circular steel beam A at the intersection of the ventilation hub cavern A and the exhaust shaft are immediately constructed, and then the initial support layer at the arc-shaped side of the upper step is constructed, and it is ensured that the top of the initial support layer is firmly welded to the polygonal steel frame and the inscribed circular steel beam A, and the initial support layer is ensured to be located on the rock surface of the upper step, and then the contraction anchor rod is constructed to lock the arch foot of the initial support layer at the arc-shaped side of the upper step; Step C, applying system anchor rods within the arc-shaped side range of the upper step, and spraying concrete on the arc-shaped excavation surface of the upper step to form a protective structure; Step D: After the shotcrete reaches the designed strength, remove the rock column; Step E: excavate the middle and lower steps of the ventilation hub cavern A, and gradually complete the construction of the middle and lower parts of the initial support layer from top to bottom. At the same time, construct a diamond steel frame and an inscribed circular steel beam B at the intersection of the ventilation hub cavern A and the ventilation cross tunnel.

[0029] The method for constructing the exhaust shaft in step 5 comprises the following steps: Step a, excavating a foundation pit covering the distribution range of the decentralized exhaust structure at the top of the mountain; Step b: excavating the centralized air duct section at the bottom of the foundation pit by using the reverse well method until the centralized air duct section is connected with the ventilation hub cavern A; Step c, constructing the concrete lining structure of the centralized air duct section from bottom to top; Step d: construct a zigzag air duct in the foundation pit, then construct explosion-proof panels and backfill covering layers in sequence, and finally plant trees around the zigzag air duct.

[0030] The method for constructing the internal structure of the ventilation hub cavern A in step eight comprises the following steps: Step 1: construct the fire extinguishing gas storage bin at the bottom of the inner side of the cavern support structure, and install the gas supplementary pipeline and the buried pipeline; Step 2: construct the air duct, and then install the axial flow fan between the air duct and the centralized air duct section; Step 3: Drill holes in the air duct and complete the installation of the ventilation duct; Step 4: Construct the bottom plate of the equipment warehouse.

[0031] The beneficial effects of the present invention are: 1. When all the data tunnels in the bottom data tunnel group adopt a radial layout, only one vertical shaft exhaust system is needed to meet the exhaust requirements of all the data tunnels in the bottom data tunnel group. While the number of data tunnels included in the bottom data tunnel group is far greater than four, the present invention controls the number of vertical shaft exhaust systems in the cave-type data center to one, thereby greatly reducing the engineering investment of the cave-type data center.

[0032] 2. When the radial cavern-type data center includes an upper data tunnel group, all data tunnels in a radial layout in the bottom data tunnel group share a vertical shaft exhaust system with all data tunnels in a radial layout in the upper data tunnel group. Only one vertical shaft exhaust system is needed to meet the exhaust needs of all data tunnels in the multi-layer data tunnel group. In other words, the data tunnels adopt this layered + radial layout method, which increases the number of data tunnels in the data center while further reducing the engineering investment of the cavern-type data center.

[0033] 3. The top of the cavern support structure is arranged with an intersection connected to the exhaust shaft, and a reinforcement structure of "polygonal steel frame + inscribed circular steel beam A" is arranged at the intersection; the side wall of the cavern support structure is arranged with an intersection connected to the ventilation cross hole, and a reinforcement structure of "diamond steel frame + inscribed circular steel beam B" is arranged at the intersection; these two reinforcement structures ensure the force reliability of the cavern support structure in the case of multiple three-dimensional intersections. The secondary lining layer inside the initial support layer serves as a permanent support to ensure the stability of the ventilation hub cavern A structure.

[0034] 4. When operating in temperature control mode, the shaft exhaust system does not need to be involved in the work. Therefore, the shaft exhaust system only works when operating in air exchange mode or fire smoke exhaust mode. The air exchange modes of each data tunnel can be run at different times, so a single shaft exhaust system can meet the air exchange needs of all data tunnels. At the same time, since all data tunnels are independent of each other, when a fire occurs in an individual data tunnel, a single shaft exhaust system can also meet the smoke exhaust needs. It can be seen that the use of the internal circulation temperature control mode reduces the utilization rate of the shaft exhaust system by the data tunnel, thereby ensuring the feasibility of a single shaft exhaust system to meet the exhaust and smoke exhaust needs of the data center.

[0035] 5. The decentralized exhaust structure includes multiple zigzag air ducts. When some of the zigzag air ducts are damaged and blocked, it ensures that the exhaust shaft can still exhaust and operate normally, thereby improving the exhaust reliability of the exhaust shaft. The explosion-proof plate is a multi-layer thin plate structure or a single-layer thick plate structure, and the buried depth of the explosion-proof plate in the mountain is set to be no less than 5m to ensure that the decentralized exhaust structure has good explosion-proof performance. The backfill covering layer is mainly used to restore the surface around the decentralized exhaust structure, and cooperate with the trees planted around the zigzag air duct to achieve the purpose of concealing the location of the exhaust shaft.

[0036] 6. By controlling the opening and closing of the air inlet through the damper, the problem of cross-winding in multiple data tunnels can be avoided, and ventilation control of single and multiple data tunnels can be achieved. The shape and size of the outer wall of the air duct between the top of the air inlet and the fire extinguishing gas storage bin gradually expand from top to bottom, so that the airflow discharged from the ventilation cross hole can be smoothly guided into the air duct through the outer wall of the air duct, and the axial flow fan can quickly inhale and guide the air discharged from the data tunnel into the air duct.

[0037] 7. The spherical excavation and reserved core soil method is used for excavation, which can better reserve the rock pillar directly below the exhaust shaft as a temporary supporting structure, thereby effectively reducing the risk of arch collapse during the excavation of large-scale caverns.

[0038] 8. The exhaust shaft is constructed by the reverse well method. The tunnel slag can directly flow down to the ventilation hub cavern A through the drilled channel constructed in advance, which is conducive to the rapid transportation of tunnel slag; and the groundwater gushing out during the construction of the exhaust shaft can also seep through the drilled channel, reducing the construction risk of the exhaust shaft; in addition, under the action of pressure difference, the wind flow can naturally flow into the exhaust shaft through the data tunnel, ventilation hub cavern A and the drilled channel, and be discharged upward, which is conducive to the construction ventilation during the excavation of the exhaust shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A cross-sectional view of the present invention when there is an upper data tunnel group; Figure 2 The plan layout of the mountain, data tunnels and shaft exhaust system when the present invention has an upper data tunnel group; Figure 3 It is a cross-sectional view of the present invention without the upper data tunnel group; Figure 4 It is a plan layout diagram of the mountain, data tunnel and shaft exhaust system when there is no upper data tunnel group in the present invention; Figure 5 This is a schematic diagram of the structure of the present invention when there is no upper layer data tunnel group and the air exchange mode is running; Figure 6 This is a schematic diagram of the structure of the present invention when there is no upper layer data tunnel group and the fire smoke exhaust mode is running; Figure 7 This is a schematic diagram of the structure of the present invention when there is no upper data tunnel group and the temperature control mode is running; Figure 8 It is a schematic diagram of the assembly structure of the intermittent data tunnel, ventilation hub cavern A and centralized air duct section of the present invention; Fig. 9 It is a schematic diagram of the assembly structure of the through-type data tunnel, the initial support layer, the main door, the small door, the ventilation pipe and the exhaust shaft of the present invention; Fig.10 It is a schematic diagram of the assembly structure of the intermittent data tunnel, the initial support layer, the ventilation pipe, the diamond steel frame, the inscribed circular steel beam B and the exhaust shaft of the present invention; Fig.11 It is a schematic diagram of the horizontal arrangement of the data tunnel of the present invention; Fig.12 It is a schematic structural diagram of the rock pillar and the arc-shaped side portion of the present invention; Fig.13 It is a structural schematic diagram of the air guide duct of the present invention; Fig.14 It is a schematic diagram of the assembly structure of the polygonal steel frame and the inscribed circular steel beam A of the present invention; Fig.15It is a schematic diagram of a centralized air duct section and a broken-line air duct of the present invention; Fig.16 It is a development diagram of the steel arch frame and the ventilation cross hole after being assembled according to the present invention; Fig.17 It is a schematic diagram of the assembly structure of the data tunnel, ventilation hub cavern B, ventilation cross tunnel, ventilation duct, buried pipeline, centralized air duct section, axial flow fan and anti-fall net of the present invention.

[0040] In the figure: 100-mountain, 200-shaft exhaust system, 300-bottom data tunnel group, 400-upper data tunnel group, 500-anti-fall net, 600-arc-shaped side; 1-Data tunnel, 2-Ventilation hub cavern A, 21-Cavern support structure, 211-Initial support layer, 212-Polygonal steel frame, 213-Inscribed circular steel beam A, 214-Diamond steel frame, 215-Inscribed circular steel beam B, 216-Gate, 217-Small door, 22-Equipment warehouse, 23-Fire extinguishing gas storage warehouse, 24-Air duct, 241-Air inlet, 3-Exhaust shaft, 31-Centralized air duct section, 32-Distributed exhaust structure, 321-Zero-line air duct, 322 - explosion-proof plate, 323- backfill cover layer, 4- ventilation cross hole, 5- ventilation pipe, 6- buried pipeline, 7- axial flow fan, 8- rock column, 9- ventilation hub cavern B, 91- annular arch frame, 92- vertical connection arch frame, 93- diamond reinforced arch frame, 11- air conditioning temperature control room, 12- equipment storage room, 13- upper air duct, 131- suction fan A, 132- suction fan B, 14- side air duct, 16- aisle, 17- lower air duct, 171- exhaust fan A, 172- exhaust fan B. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0042] Embodiment 1: A radial cave-type data center described in the present invention includes a mountain 100 and a vertical shaft exhaust system 200, a bottom data tunnel group 300 and a plurality of upper data tunnel groups 400 arranged in the mountain 100. One end of the vertical shaft exhaust system 200 is connected to the surface of the mountain 100, and the upper data tunnel group 400 is located on the upper side of the bottom data tunnel group 300. One end of all data tunnels 1 in the upper data tunnel group 400 and one end of all data tunnels 1 in the bottom data tunnel group 300 are connected to the vertical shaft exhaust system 200, and the other ends extend in different directions with the vertical shaft exhaust system 200 as the center until they are connected to the surface of the mountain 100.

[0043] When the radial cavernous data center does not include the upper data tunnel group 400, the structure is as follows: Figure 3 and Figure 4 As shown, all data tunnels 1 included in the bottom data tunnel group 300 extend and radiate in different directions with the vertical shaft exhaust system 200 as the center. That is to say, when all data tunnels 1 in the bottom data tunnel group 300 adopt this radial layout, only one vertical shaft exhaust system 200 is needed to meet the exhaust requirements of all data tunnels 1 in the bottom data tunnel group 300. Figure 4 It can be seen intuitively that, while the number of data tunnels 1 included in the bottom data tunnel group 300 of the present invention is far greater than four, the number of vertical shaft exhaust systems 200 of the cave-type data center is controlled to one, which greatly reduces the engineering investment of the cave-type data center.

[0044] When the radial cavern-type data center has an upper data tunnel group 400, the structure is as follows Figure 1 and Figure 2 As shown, all data tunnels 1 in a radial layout in the bottom data tunnel group 300 and all data tunnels 1 in a radial layout in the upper data tunnel group 400 share a vertical shaft exhaust system 200. Only one vertical shaft exhaust system 200 is needed to meet the exhaust needs of all data tunnels 1 in the multi-layer data tunnel group. In other words, the data tunnels 1 adopt this layered + radial layout method, which increases the number of data tunnels 1 in the data center while further reducing the engineering investment of the cavern-type data center.

[0045] When the radial cave-type data center has multiple upper data tunnel groups 400, the situation is similar to when the radial cave-type data center has one upper data tunnel group 400, and will not be repeated here.

[0046] like Figure 2 As shown, when the radial cavernous data center includes an upper data tunnel group 400, the data tunnels 1 in the upper and lower adjacent layers are spatially staggered to ensure that the data tunnel 1 has a stable structure.

[0047] The shaft exhaust system 200 includes a ventilation hub cavern A2 and an exhaust shaft 3, and the exhaust shaft 3 is connected to the ventilation hub cavern A2 and the top of the mountain 100. When in use, the shaft exhaust system 200 is arranged in a relatively central position in the mountain 100. The ventilation hub cavern A2 is used to collect the wind and smoke exhausted from all data tunnels 1 in the bottom data tunnel group 300, and further discharge them to the exhaust shaft 3; the exhaust shaft 3 is used to collect the wind and smoke exhausted from all data tunnels 1 in the upper data tunnel group 400, and discharge all the wind and smoke to the top of the mountain 100.

[0048] The ventilation hub cavern A2 includes a cavern support structure 21, a gas supplementary pipeline and an air duct 24. An equipment warehouse 22 is provided at the top of the inner side of the cavern support structure 21, and a fire extinguishing gas storage warehouse 23 is provided at the bottom of the inner side of the cavern support structure 21. One end of the gas supplementary pipeline is connected to the top plate of the fire extinguishing gas storage warehouse 23, and the other end extends to the outside of the mountain 100. A gas pipeline switch is provided at this end. The air duct 24 is located on the inner side of the cavern support structure 21, and its lower end is connected to the fire extinguishing gas storage warehouse 23, and its upper end extends into the equipment warehouse 22. When in use, the gas supplementary pipeline is used as a supplementary pipeline for non-flammable gas in the fire extinguishing gas storage warehouse 23.

[0049] The cavern support structure 21 is in the shape of an ellipsoid, including an initial support layer 211 and a secondary lining layer arranged inside the initial support layer 211, and the initial support layer 211 is an ellipsoid steel arch structure. When in use, the cavern support structure 21 is in the shape of an ellipsoid, and it adopts an ellipsoid frame layout, that is, each arch is centered on the center of the ellipsoid. An intersection connected to the exhaust shaft 3 is arranged on the top of the cavern support structure 21, and a reinforcing structure of "polygonal steel frame 212 + inscribed circular steel beam A213" is arranged at the intersection; an intersection connected to the ventilation cross hole 4 is arranged on the side wall of the cavern support structure 21, and a reinforcing structure of "diamond steel frame 214 + inscribed circular steel beam B215" is arranged at the intersection; these two reinforcing structures are used to ensure the force reliability of the cavern support structure 21 in the case of multiple three-dimensional intersections. The secondary lining layer inside the initial support layer 211 serves as a permanent support to ensure the structural stability of the ventilation hub cavern A2.

[0050] The fire extinguishing gas storage bin 23 is provided with non-flammable gas such as nitrogen, argon or IG541 mixed gas.

[0051] like Figure 5 , Figure 6 and Figure 8 As shown, the exhaust shaft 3 includes a centralized air duct section 31 and a decentralized exhaust structure 32. The lower part of the centralized air duct section 31 is connected to the top of the cavern support structure 21, and the lower end of the centralized air duct section 31 extends into the equipment bin 22 and is connected to the upper end of the air guide 24 through the axial flow fan 7. The decentralized exhaust structure 32 is connected to the upper end of the centralized air duct section 31 and communicates with the top of the mountain 100. When in use, the axial flow fan 7 provides power for exhausting the exhaust shaft 3 to increase the wind speed inside it and improve its exhaust efficiency.

[0052] like Fig.14 As shown, a polygonal steel frame 212 is provided on the initial supporting layer 211 at the connection between the initial supporting layer 211 and the centralized air duct section 31 , and an inscribed circular steel beam A213 is provided on the inner side of the polygonal steel frame 212 .

[0053] like Figure 6 and Fig.15 As shown, the decentralized exhaust structure 32 includes an explosion-proof plate 322, a backfill covering layer 323 and a plurality of zigzag air ducts 321. The explosion-proof plate 322 is arranged in the mountain 100 and is located directly above the centralized air duct section 31, and the burial depth of the explosion-proof plate 322 in the mountain 100 is not less than 5m. The backfill covering layer 323 is arranged on the explosion-proof plate 322. One ends of the plurality of zigzag air ducts 321 are all connected to the upper end of the centralized air duct section 31, and the other ends are exposed at the top of the mountain 100 as exhaust outlets, and are irregularly distributed around the centralized air duct section 31. Trees are planted around the zigzag air ducts 321 at the top of the mountain 100. When in use, the decentralized exhaust structure 32 includes a plurality of zigzag air ducts 321. When some of the zigzag air ducts 321 are damaged and blocked, it is ensured that the exhaust shaft 3 can still exhaust and operate normally, thereby improving the exhaust reliability of the exhaust shaft 3. The explosion-proof plate 322 is a multi-layer thin plate structure or a single-layer thick plate structure, and the buried depth of the explosion-proof plate 322 in the mountain 100 is set to be no less than 5m to ensure that the decentralized exhaust structure 32 has good explosion-proof performance. The backfill covering layer 323 is mainly used to restore the surface around the decentralized exhaust structure 32, and cooperate with the trees planted around the zigzag air duct 321 to achieve the purpose of concealing the position of the exhaust shaft 3.

[0054] One end of all data tunnels 1 in the bottom data tunnel group 300 is connected to the ventilation hub cavern A2; The data tunnel 1 includes two types: a through data tunnel and an intermittent data tunnel. The bottom data tunnel group 300 includes two through data tunnels and several intermittent data tunnels. The two through data tunnels are arranged along the same straight line and arranged horizontally along the mountain 100. The ends of the two through data tunnels that are close to each other are connected to the cavern support structure 21, and a fireproof isolation door is provided at the connection between the through data tunnel and the cavern support structure 21. One end of the several intermittent data tunnels is connected to the cavern support structure 21 through a ventilation cross tunnel 4, and the connection between the ventilation cross tunnel 4 and the cavern support structure 21 is located between the equipment warehouse 22 and the fire extinguishing gas storage warehouse 23, and fireproof isolation doors are provided at both ends of the ventilation cross tunnel 4. When in use, since the ventilation hub cavern A2 and the shaft exhaust system 200 require the assistance of two through-type data tunnels for construction, the through-type data tunnels are arranged in a narrow position of the mountain 100 to minimize the total length of the two through-type data tunnels and achieve the purpose of shortening the construction period.

[0055] The length of the ventilation tunnel 4 is between 10m and 20m, and the cross-sectional area is between 10m 2 ~15m 2When in use, the ventilation tunnel 4 is used as a connecting channel between the intermittent data tunnel and the ventilation hub cavern A2. Its length is controlled within 10m~20m. If it is too long, the length of the intermittent data tunnel will be compressed, reducing the installation space of IT equipment in the intermittent data tunnel. If it is too short, it will affect the stability of the ventilation hub cavern A2. The cross-sectional area of ​​the ventilation tunnel 4 is controlled within 10m 2 ~15m 2 If the cross section is too large, it will affect the stability of the ventilation hub cavern A2, and if it is too small, it will affect its ventilation efficiency. In order to avoid turbulence when the wind flows from the large cross section of the intermittent data tunnel into the small cross section of the ventilation tunnel, a trumpet-shaped guide plate can be set on the ventilation tunnel 4 near one end of the intermittent data tunnel.

[0056] like Fig.10 As shown, a diamond-shaped steel frame 214 is provided on the initial support layer 211 at the connection between the initial support layer 211 and the ventilation cross hole 4, and an inscribed circular steel beam B215 is provided on the inner side of the diamond-shaped steel frame 214; like Fig. 9 As shown, the fireproof isolation door at the connection between the through-type data tunnel and the cavern support structure 21 includes two large doors 216 and two small doors 217. The two large doors 216 are used to close the ends of the through-type data tunnel, and a circular through hole is provided at the closing seam of the two large doors 216. The circular through hole is arranged at the same elevation as the ventilation cross hole 4, and the diameter of the circular through hole is consistent with the inner diameter of the ventilation cross hole 4. The two small doors 217 are arranged at the circular through hole and form a seal thereon. When the two large doors 216 are opened, they are only used as the entrance and exit of large equipment in the ventilation hub cavern A2, and are closed on a daily basis; the two small doors 217 are used as ventilation openings, which are opened and closed as needed.

[0057] like Fig.13 As shown, the air duct 24 is provided with air inlets 241 at positions corresponding to the ventilation horizontal holes 4 and the circular through holes, and a damper is provided at the air inlet 241; The shape and size of the outer wall of the air duct 24 located between the top of the air inlet 241 and the fire extinguishing gas storage bin 23 gradually expand from top to bottom. When in use, the opening and closing of the air inlet 241 is controlled by the damper, which can avoid the problem of cross-winding of multiple data tunnels 1 and realize the ventilation control of single and multiple data tunnels 1. The shape and size of the outer wall of the air duct 24 located between the top of the air inlet 241 and the fire extinguishing gas storage bin 23 gradually expand from top to bottom, so that the wind discharged from the ventilation cross hole 4 can be smoothly guided into the air duct 24 through the outer wall of the air duct 24, and the wind discharged from the data tunnel 1 can be quickly sucked in and guided into the air duct 24 in cooperation with the axial flow fan 7.

[0058] like Fig.11As shown, the through-type data tunnel and the intermittent data tunnel both include a data cavern, an upper air duct 13 is provided at the top of the inner side of the data cavern, a lower air duct 17 is provided at the bottom, and side air ducts 14 are provided on the left and right sides. An air-conditioning temperature control room 11 and an equipment storage room 12 are provided in the space enclosed by the upper air duct 13, the lower air duct 17 and the side air duct 14. The air-conditioning temperature control room 11 is provided with an air-conditioning unit and is arranged at one end of the data cavern away from the ventilation hub cavern A2. The equipment storage room 12 is provided with IT equipment; One end of the upper air duct 13 is connected to the air conditioning unit in the air conditioning temperature control room 11, and the end is provided with an outer end pipe switch A and a suction fan A131, and the other end is connected to the air guide pipe 24 through the ventilation pipe 5, and the end is provided with an inner end pipe switch A and a suction fan B132; One end of the lower air duct 17 is connected to the air conditioning unit in the air conditioning temperature control room 11, and the end is provided with an outer end pipe switch B and an exhaust fan A171, and the other end is connected to the fire extinguishing gas storage bin 23 through a buried pipe 6, and the end is provided with an inner end pipe switch B and an exhaust fan B172; One end of the side air duct 14 is connected to the outside of the mountain 100, and is provided with an external end pipe switch C and an air filter, and the other end is connected to an end surface of the data cavern near the ventilation hub cavern A2; The upper air duct 13, the lower air duct 17 and the side air duct 14 are provided with a plurality of ventilation holes on the side walls thereof, which are connected to the equipment storage room 12. When in use, an air filter is arranged at one end of the side air duct 14 connected to the outside of the mountain 100, so as to filter out dust and other particles in the air entering the data tunnel 1 through the air filter, and adjust the air humidity to the required range of the data center. The air conditioning temperature control room 11 is arranged at one end of the data tunnel away from the ventilation hub cavern A2, so as to facilitate the heat dissipation of the air conditioning unit inside it.

[0059] An explosion-proof isolation door is provided at one end of the data cavern away from the ventilation hub cavern A2, and a fireproof isolation door is provided between the air-conditioning temperature control room 11 and the equipment storage room 12; The equipment storage room 12 is provided with two rows of IT equipment, and an aisle 16 is provided between the two rows of IT equipment. The aisle 16 is provided between the two rows of IT equipment to facilitate the passage of staff.

[0060] like Fig.17As shown, the centralized air duct section 31 is provided with a plurality of ventilation hub caverns B9 at positions corresponding to a plurality of upper data tunnel groups 400, and an anti-falling net 500 is provided within a range of 1m below each ventilation hub cavern B9 in the centralized air duct section 31, and an axial flow fan 7 is provided on the upper side of each ventilation hub cavern B9. The ventilation hub cavern B9 is used to collect the wind and smoke exhausted from all data tunnels 1 in a corresponding upper data tunnel group 400, and an anti-falling net 500 is provided within a range of 1m below it to eliminate the risk of personnel falling.

[0061] like Fig.16 As shown, a steel arch frame is provided in the ventilation hub cavern B9, and the steel arch frame includes a plurality of coaxially arranged annular arch frames 91, and the plurality of annular arch frames 91 are connected together by a plurality of vertical connecting arch frames 92.

[0062] The upper data tunnel group 400 includes a plurality of intermittent data tunnels, one end of each of which is connected to the ventilation hub cavern B9 and the steel arch frame through the ventilation cross tunnel 4, and a diamond-shaped reinforcement arch frame 93 is provided on the steel arch frame on the outer side of the ventilation cross tunnel 4; One end of the lower air duct 17 of the intermittent data tunnel near the ventilation hub cavern B9 is connected to the fire extinguishing gas storage bin 23 through a fire extinguishing gas delivery pipe. A diamond-shaped reinforcement arch 93 is provided on the steel arch frame on the outside of the ventilation cross hole 4 to improve the structural strength of the intersection of the ventilation cross hole 4 and the steel arch frame through the diamond-shaped reinforcement arch 93. The middle part of the fire extinguishing gas delivery pipe can be fixedly installed on the outer wall of the centralized air duct section 31.

[0063] like Figure 7 As shown, when the data tunnel 1 runs in the temperature control mode, the air conditioning unit in the air conditioning temperature control room 11 is started, the outer end pipe switch A and the suction fan A131 at one end of the upper air duct 13 are turned on, and the inner end pipe switch A and the suction fan B132 at the other end of the upper air duct 13 are turned off, the outer end pipe switch B and the exhaust fan A171 at one end of the lower air duct 17 are turned on, and the inner end pipe switch B and the exhaust fan B172 at the other end of the lower air duct 17 are turned off; After the hot air in the upper air duct 13 enters the air conditioning unit, it is cooled by the air conditioning unit to form cold air. The cold air is sent into the equipment storage room 12 through the lower air duct 17. The cold air takes away the heat generated by the IT equipment and forms hot air to enter the upper air duct 13. This cycle repeats to achieve the purpose of controlling the temperature inside the equipment storage room 12. The internal circulation temperature control mode is adopted, and the air in the equipment storage room 12 is gradually cooled by the air conditioning unit to achieve the purpose of cooling the air and IT equipment in the data tunnel 1. When the temperature control mode is running, the shaft exhaust system 200 is not required to participate in the work. Therefore, the shaft exhaust system 200 only participates in the work when the air exchange mode or the fire smoke exhaust mode is running; and the air exchange mode of each data tunnel 1 can be staggered at different times, so a single shaft exhaust system 200 can meet the air exchange needs of all data tunnels 1; at the same time, since all data tunnels 1 are independent of each other, when a fire occurs in an individual data tunnel 1, a single shaft exhaust system 200 can also meet the smoke exhaust needs. It can be seen that the internal circulation temperature control mode reduces the utilization rate of the data tunnel 1 for the shaft exhaust system 200, thereby ensuring the feasibility of a single shaft exhaust system 200 to meet the exhaust and smoke exhaust requirements of the data center.

[0064] like Figure 5 As shown, when the data tunnel 1 is in ventilation mode, the external end pipe switch C, the two small doors 217 or the fireproof isolation doors at both ends of the ventilation tunnel 4, and the axial flow fan 7 are opened; The air outside the mountain 100 flows through the air filter and enters the side air duct 14, then diffuses into the equipment storage room 12, then enters the shaft exhaust system 200 through the circular through holes or ventilation horizontal holes 4 where the two small doors 217 are installed, and finally is discharged to the top of the mountain 100 through the shaft exhaust system 200, thereby replacing the air in the equipment storage room 12. The equipment storage room 12 uses one end of the side air duct 14 connected to the mountain 100 as an air inlet, and simultaneously uses the shaft exhaust system 200 to exhaust the air inside it, thereby replacing the air inside the equipment storage room 12.

[0065] Among all the data tunnels 1 in the bottom data tunnel group 300, only one data tunnel 1 is allowed to run the ventilation mode at the same time, and among all the data tunnels 1 in the same upper data tunnel group 400, only one data tunnel 1 is allowed to run the ventilation mode at the same time, so as to avoid cross-winding between the data tunnels 1.

[0066] like Figure 6 As shown, when the data tunnel 1 runs the fire smoke exhaust mode, the inner end pipe switch B and the exhaust fan B172 at one end of the lower air duct 17 are first opened, and the outer end pipe switch B and the exhaust fan A171 at the other end of the lower air duct 17 are closed; The non-combustible gas in the fire extinguishing gas storage bin 23 enters the lower air duct 17 through the buried pipeline 6 or the fire extinguishing gas delivery pipe, and then enters the equipment storage room 12 from the lower air duct 17 to extinguish the fire. Next, the inner end pipe switch A and the suction fan B132 at one end of the upper air duct 13 are opened, and the outer end pipe switch A and the suction fan A131 at the other end of the upper air duct 13 are closed, and the axial flow fan 7 is started. The smoke generated during the fire extinguishing process flows through the upper air duct 13 and the ventilation pipe 5 in turn and then enters the vertical shaft exhaust system 200, and is finally discharged to the top of the mountain 100 through the vertical shaft exhaust system 200. The non-combustible gas in the fire extinguishing gas storage bin 23 enters the lower air duct 17 through the buried pipeline 6 or the fire extinguishing gas delivery pipe, and then enters the equipment storage room 12 from the lower air duct 17 to reduce the oxygen content in the air in the equipment storage room 12 to achieve the purpose of fire extinguishing. The smoke generated during the fire extinguishing process flows through the upper air duct 13 and the ventilation pipe 5 in turn and enters the shaft exhaust system 200 for external discharge. When the lower air duct 17 is in the operating temperature control mode and the fire smoke exhaust mode, the flow direction of the internal wind flow is inconsistent, and the flow direction is controlled by the exhaust fan A171 and the exhaust fan B172 at both ends. Similarly, when the upper air duct 13 is in the operating temperature control mode and the fire smoke exhaust mode, the flow direction of the internal wind flow is inconsistent, and the flow direction is controlled by the suction fan A131 and the suction fan B132 at both ends.

[0067] A construction method for a radial cavernous data center comprises the following steps: Step 1: Use the partial excavation method to simultaneously construct two through-type data tunnels in the bottom data tunnel group 300 in a double-headed excavation manner until the excavation reaches the range of the ventilation hub cavern A2. Using the double-headed excavation method to quickly construct the two through-type data tunnels to the range of the ventilation hub cavern A2 can shorten the construction period and improve the construction efficiency. After the two through-type data tunnels are connected, the tunnel support structure is constructed in advance at the intersection between them and the ventilation hub cavern A2, so that the initial support layer 211 of the later construction can be directly connected to the tunnel support structure of the through-type data tunnel.

[0068] Step 2: With the help of the two through-type data tunnels that have been constructed, the ventilation hub cavern A2 is constructed by using the spherical excavation and reserved core soil method, and the initial support layer 211 of the cavern support structure 21 is constructed, as well as the polygonal steel frame 212, the inscribed circular steel beam A213, the diamond steel frame 214 and the inscribed circular steel beam B215.

[0069] Step 3: Adopt the interval skipping construction process to excavate multiple ventilation transverse tunnels 4 in the bottom data tunnel group 300 starting from the ventilation hub cavern A2, and then carry out the secondary lining layer pouring construction of the cavern support structure 21. Adopt the interval skipping construction process to construct the ventilation transverse tunnels 4 in the bottom data tunnel group 300, avoid the problem of mutual influence and interference between adjacent ventilation transverse tunnels 4, and improve the construction safety, stability and success rate of the ventilation transverse tunnels 4.

[0070] Step 4: Use the interval skipping construction process to perform single-head excavation construction of the intermittent data tunnel in the bottom data tunnel group 300 from the outside of the mountain 100 until the intermittent data tunnel is connected with the corresponding ventilation cross tunnel 4 in the bottom data tunnel group 300. Use the interval skipping construction process to construct the intermittent data tunnel in the bottom data tunnel group 300, avoid the problem of mutual influence and interference between adjacent intermittent data tunnels, and improve the construction safety, stability and success rate of the intermittent data tunnel.

[0071] Step 5: Simultaneously with step 4, the exhaust shaft 3 is constructed by adopting the reverse shaft method, and the two through-type data tunnels that have been penetrated are used as slag discharge channels.

[0072] Step 6: When the exhaust shaft 3 is constructed from top to bottom to the top elevation of a certain upper data tunnel group 400 in step 5, the corresponding ventilation hub cavern B9 is expanded and excavated, and the steel arch frame and diamond-shaped reinforced arch frame 93 are constructed downward section by section.

[0073] Then, the interval skipping construction process is adopted to carry out the excavation and initial support construction of the ventilation cross tunnel 4 in the upper data tunnel group 400, and the secondary lining of the ventilation hub cavern B9 and the ventilation cross tunnel 4 is cast as a whole.

[0074] After the construction of the intermittent data tunnel in the bottom data tunnel group 300 is completed, the intermittent data tunnel in the upper data tunnel group 400 is constructed from the outside of the mountain 100 by using an interval jump construction process until the intermittent data tunnel is connected with the corresponding ventilation cross tunnel 4 in the upper data tunnel group 400. The construction time of the data tunnels 1 in the two adjacent layers of data tunnel groups is staggered to reduce the construction interference between the upper and lower layers of data tunnels 1.

[0075] Step 7: Repeat step 6 to complete the construction of the remaining upper data tunnel groups 400 one by one from top to bottom until the exhaust shaft 3 is connected with the ventilation hub cavern A2.

[0076] Step 8: After the civil construction of the data center is completed, use the two through-type data tunnels as transportation channels to first carry out the internal structure construction and equipment installation of the ventilation hub cavern A2 and the exhaust shaft 3, and then carry out the internal structure construction and equipment installation of each data tunnel 1.

[0077] The specific construction process of step 2 includes the following steps: like Fig.12 As shown, step A, during the excavation of the ventilation hub cavern A2, the rock column 8 located directly below the exhaust shaft 3 is retained as a temporary supporting structure, and then the arc-shaped side portion 600 around the rock column 8 is excavated in steps to form an arc-shaped excavation surface, and the arc-shaped excavation surface is sprayed with concrete for protection.

[0078] Step B, after the excavation of the upper step arc-shaped side 600 of the ventilation hub cavern A2 is completed, the polygonal steel frame 212 and the inscribed circular steel beam A213 at the intersection of the ventilation hub cavern A2 and the exhaust shaft 3 are immediately constructed, and then the initial support layer 211 at the upper step arc-shaped side 600 is constructed, and it is ensured that the top of the initial support layer 211 is firmly welded to the polygonal steel frame 212 and the inscribed circular steel beam A213, and the initial support layer 211 is ensured to be located on the upper step rock surface, and then the retracted foot anchor rods are constructed to lock the arch foot of the initial support layer 211 at the upper step arc-shaped side 600.

[0079] Step C: construct system anchor rods within the range of 600 of the arc-shaped side of the upper step, and spray concrete on the arc-shaped excavation surface of the upper step to form a protective structure.

[0080] Step D: After the shotcrete reaches the designed strength, the rock column 8 is removed. During the removal of the rock column 8, it is necessary to strengthen the construction monitoring and measurement. If obvious settlement and deformation occur, temporary vertical supports should be constructed in time to support the earthwork on the upper side of the ventilation hub cavern A2, and surrounding rock grouting reinforcement operations should be carried out.

[0081] Step E: excavate the middle and lower steps of the ventilation hub cavern A2, and gradually complete the middle and lower construction of the initial support layer 211 from top to bottom. At the same time, construct a diamond steel frame 214 and an inscribed circular steel beam B215 at the intersection of the ventilation hub cavern A2 and the ventilation cross tunnel 4.

[0082] The spherical excavation and reserved core soil method is used for excavation, so that the rock column 8 directly below the exhaust shaft 3 can be well reserved as a temporary supporting structure, thereby effectively reducing the risk of arch collapse during the excavation of large-sized caverns.

[0083] The method for constructing the exhaust shaft 3 in step 5 comprises the following steps: Step a: dig a foundation pit on the top of the mountain 100 that covers the distribution range of the decentralized exhaust structure 32.

[0084] Step b: excavate the centralized air duct section 31 at the bottom of the foundation pit using the reverse well method until the centralized air duct section 31 is connected with the ventilation hub cavern A2. After excavation, the initial support of the centralized air duct section 31 is immediately constructed.

[0085] Step c: constructing the concrete lining structure of the centralized air duct section 31 from bottom to top.

[0086] Step d: construct the zigzag air duct 321 in the foundation pit, then construct the explosion-proof plate 322 and the backfill covering layer 323 in sequence, and finally plant trees around the zigzag air duct 321.

[0087] The exhaust shaft 3 is constructed by the reverse well method, and the tunnel slag can directly slide down to the ventilation hub cavern A2 through the drilled channel constructed in advance, which is beneficial to the rapid transportation of the tunnel slag; and the groundwater gushing out during the construction of the exhaust shaft 3 can also infiltrate through the drilled channel, reducing the construction risk of the exhaust shaft 3; in addition, under the action of pressure difference, the wind flow can naturally flow into the exhaust shaft 3 through the data tunnel 1, the ventilation hub cavern A2 and the drilled channel, and be discharged upward, which is beneficial to the construction ventilation during the excavation of the exhaust shaft 3.

[0088] The method for constructing the internal structure of the ventilation hub cavern A2 in step eight comprises the following steps: Step 1: construct the fire extinguishing gas storage bin 23 at the bottom of the inner side of the cavern support structure 21, and install the gas supplementary pipeline and the buried pipeline 6.

[0089] Step 2: construct the air duct 24 , and then install the axial flow fan 7 between the air duct 24 and the centralized air duct section 31 .

[0090] Step 3: Drill holes in the air duct 24 and complete the installation of the ventilation duct 5.

[0091] Step 4: construct the bottom plate of the equipment warehouse 22.

[0092] Embodiment 2: In order to ensure the power demand of the cave-type data center, any intermittent data tunnel can be selected as a power tunnel, and a diesel generator or other power generation equipment can be installed in it to provide power for the electrical appliances of the entire cave-type data center in the event of a power outage in the external power grid. If a diesel generator is installed in the power tunnel, a separate ventilation shaft can be built to connect with the power tunnel as a ventilation and smoke exhaust channel for the power tunnel.

Claims

1. A radial cavern-type data center, characterized in that: The invention comprises a mountain (100), a vertical shaft exhaust system (200) arranged in the mountain (100), a bottom data tunnel group (300) and a plurality of upper data tunnel groups (400), wherein one end of the vertical shaft exhaust system (200) is connected to the surface of the mountain (100), the upper data tunnel group (400) is located on the upper side of the bottom data tunnel group (300), one end of all the data tunnels (1) in the upper data tunnel group (400) and one end of all the data tunnels (1) in the bottom data tunnel group (300) are connected to the vertical shaft exhaust system (200), and the other ends of all the data tunnels (1) are extended in different directions with the vertical shaft exhaust system (200) as the center until they are connected to the surface of the mountain (100); The shaft exhaust system (200) comprises a ventilation hub cavern A (2) and an exhaust shaft (3), wherein the exhaust shaft (3) is connected to the ventilation hub cavern A (2) and the top of the mountain (100); The ventilation hub cavern A (2) comprises a cavern support structure (21), a gas replenishment pipeline and an air duct (24); an equipment bin (22) is provided at the top of the inner side of the cavern support structure (21), and a fire extinguishing gas storage bin (23) is provided at the bottom of the inner side of the cavern support structure (21); one end of the gas replenishment pipeline is connected to the fire extinguishing gas storage bin (23), and the other end extends to the outside of the mountain (100), and a gas pipeline switch is provided at the end; the air duct (24) is located on the inner side of the cavern support structure (21), and the lower end thereof is connected to the top plate of the fire extinguishing gas storage bin (23), and the upper end thereof extends into the equipment bin (22).

2. The radial cavern data center according to claim 1, characterized in that: The cavern support structure (21) is ellipsoidal, comprising an initial support layer (211) and a secondary lining layer arranged inside the initial support layer (211); the initial support layer (211) is an ellipsoidal steel arch structure.

3. The radial cavern data center according to claim 1, characterized in that: The fire extinguishing gas storage bin (23) is provided with non-flammable gas such as nitrogen, argon or IG541 mixed gas.

4. The radial cavern data center according to claim 2, characterized in that: The exhaust shaft (3) comprises a centralized air duct section (31) and a decentralized exhaust structure (32); the lower portion of the centralized air duct section (31) is connected to the top of the cavern support structure (21); the lower end of the centralized air duct section (31) extends into the equipment bin (22) and is connected to the upper end of the air guide duct (24) via an axial flow fan (7); the decentralized exhaust structure (32) is connected to the upper end of the centralized air duct section (31) and is in communication with the top of the mountain (100).

5. The radial cavern-type data center according to claim 4, characterized in that: A polygonal steel frame (212) is provided on the initial support layer (211) at the connection between the initial support layer and the centralized air duct section (31), and an inscribed circular steel beam A (213) is provided on the inner side of the polygonal steel frame (212).

6. The radial cavern data center according to claim 4, characterized in that: The decentralized exhaust structure (32) comprises an explosion-proof plate (322), a backfill covering layer (323), and a plurality of zigzag air ducts (321). The explosion-proof plate (322) is arranged in the mountain (100) and is located directly above the centralized air duct section (31). The explosion-proof plate (322) is buried at a depth of not less than 5 m in the mountain (100). The backfill covering layer (323) is arranged on the explosion-proof plate (322). One end of the plurality of zigzag air ducts (321) is connected to the upper end of the centralized air duct section (31), and the other end is exposed at the top of the mountain (100) as an exhaust port. The plurality of zigzag air ducts (321) are irregularly distributed around the centralized air duct section (31). Trees are planted around the zigzag air ducts (321) at the top of the mountain (100).

7. The radial cavern data center according to claim 5, characterized in that: One end of all data tunnels (1) in the bottom data tunnel group (300) is connected to the ventilation hub cavern A (2); The data tunnel (1) includes two types: a through data tunnel and an intermittent data tunnel. The bottom data tunnel group (300) includes two through data tunnels and a plurality of intermittent data tunnels. The two through data tunnels are arranged along the same straight line and arranged horizontally along the mountain (100). The ends of the two through data tunnels that are close to each other are connected to the cavern support structure (21), and a fireproof isolation door is provided at the connection between the through data tunnel and the cavern support structure (21). One end of the plurality of intermittent data tunnels is connected to the cavern support structure (21) through a ventilation cross tunnel (4), and the connection between the ventilation cross tunnel (4) and the cavern support structure (21) is located between the equipment warehouse (22) and the fire extinguishing gas storage warehouse (23). Both ends of the ventilation cross tunnel (4) are provided with fireproof isolation doors.

8. The radial cavern-type data center according to claim 7, characterized in that: The length of the ventilation tunnel (4) is between 10m and 20m, and the cross-sectional area is between 10m 2 ~15m 2 between.

9. The radial cavern-type data center according to claim 7, characterized in that: A diamond-shaped steel frame (214) is provided on the initial support layer (211) at the connection between the initial support layer and the ventilation cross hole (4), and an inscribed circular steel beam B (215) is provided on the inner side of the diamond-shaped steel frame (214); The fireproof isolation door at the connection between the through-type data tunnel and the cavern support structure (21) comprises two large doors (216) and two small doors (217). The two large doors (216) are used to close the ends of the through-type data tunnel, and a circular through hole is provided at the closing seam of the two large doors (216). The circular through hole is arranged at the same elevation as the ventilation horizontal hole (4), and the diameter of the circular through hole is consistent with the inner diameter of the ventilation horizontal hole (4). The two small doors (217) are arranged at the circular through hole to close it.

10. The radial cavern data center according to claim 9, characterized in that: The air guide pipe (24) is provided with air inlets (241) at positions corresponding to the ventilation horizontal holes (4) and the circular through holes, and an air door is provided at the air inlet (241); The shape and size of the outer wall of the air guide pipe (24) located between the top of the air inlet (241) and the fire extinguishing gas storage bin (23) gradually expand from top to bottom.

11. The radial cavern data center according to claim 9, characterized in that: The through-type data tunnel and the intermittent data tunnel both comprise a data cavern, wherein an upper air duct (13) is provided at the top of the inner side of the data cavern, a lower air duct (17) is provided at the bottom, and side air ducts (14) are provided on the left and right sides; an air conditioning temperature control room (11) and an equipment storage room (12) are provided in the space enclosed by the upper air duct (13), the lower air duct (17) and the side air duct (14); an air conditioning unit is provided in the air conditioning temperature control room (11) and is arranged at one end of the data cavern away from the ventilation hub cavern A (2); and IT equipment is provided in the equipment storage room (12); One end of the upper air duct (13) is connected to the air conditioning unit in the air conditioning temperature control room (11), and is provided with an outer end pipe switch A and a suction fan A (131), and the other end is connected to the air guide pipe (24) through the ventilation pipe (5), and is provided with an inner end pipe switch A and a suction fan B (132); One end of the lower air duct (17) is connected to the air conditioning unit in the air conditioning temperature control room (11), and the end is provided with an external end pipe switch B and an exhaust fan A (171), and the other end is connected to the fire extinguishing gas storage bin (23) through a concealed pipe (6), and the end is provided with an internal end pipe switch B and an exhaust fan B (172); One end of the side air duct (14) is in communication with the outside of the mountain (100), and is provided with an external end pipe switch C and an air filter, and the other end is connected to an end surface of the data cavern close to the ventilation hub cavern A (2); The side walls of the upper air duct (13), the lower air duct (17) and the side air duct (14) are all provided with a plurality of ventilation holes which are in communication with the equipment storage chamber (12).

12. The radial cavern data center according to claim 11, characterized in that: An explosion-proof isolation door is provided at one end of the data cavern away from the ventilation hub cavern A (2), and a fireproof isolation door is provided between the air-conditioning temperature control room (11) and the equipment storage room (12); The equipment storage room (12) is provided with two rows of IT equipment, and an aisle (16) is provided between the two rows of IT equipment.

13. The radial cavern data center according to claim 11, characterized in that: The centralized air duct section (31) is provided with a plurality of ventilation hub caverns B (9) at positions corresponding one to one to a plurality of upper data tunnel groups (400), and an anti-falling net (500) is provided within a range of 1 m below each ventilation hub cavern B (9) in the centralized air duct section (31), and an axial flow fan (7) is provided on the upper side of each ventilation hub cavern B (9).

14. The radial cavern data center according to claim 13, characterized in that: A steel arch frame is provided in the ventilation hub cavern B (9), and the steel arch frame comprises a plurality of coaxially arranged annular arch frames (91), and the plurality of annular arch frames (91) are connected together via a plurality of vertical connecting arch frames (92).

15. The radial cavern data center according to claim 14, characterized in that: The upper data tunnel group (400) includes a plurality of intermittent data tunnels, one end of each of which is connected to the ventilation hub cavern B (9) and the steel arch frame through the ventilation cross hole (4), and a diamond-shaped reinforcement arch frame (93) is provided on the steel arch frame on the outer side of the ventilation cross hole (4); One end of the lower air ducts (17) of the plurality of intermittent data tunnels close to the ventilation hub cavern B (9) is connected to the fire extinguishing gas storage bin (23) via a fire extinguishing gas delivery pipe.

16. The radial cavern data center according to claim 11, characterized in that: When the data tunnel (1) operates in a temperature control mode, the air conditioning unit in the air conditioning temperature control room (11) is started, the outer end pipe switch A and the suction fan A (131) at one end of the upper air duct (13) are turned on, and the inner end pipe switch A and the suction fan B (132) at the other end of the upper air duct (13) are turned off, the outer end pipe switch B and the exhaust fan A (171) at one end of the lower air duct (17) are turned on, and the inner end pipe switch B and the exhaust fan B (172) at the other end of the lower air duct (17) are turned off; After the hot air in the upper air duct (13) enters the air conditioning unit, it is cooled by the air conditioning unit to form cold air. The cold air is sent into the equipment storage room (12) through the lower air duct (17). The cold air takes away the heat generated by the operation of the IT equipment and forms hot air that enters the upper air duct (13). This cycle is repeated to achieve the purpose of controlling the temperature inside the equipment storage room (12).

17. The radial cavern data center according to claim 11, characterized in that: When the data tunnel (1) operates in the ventilation mode, the external end pipe switch C, the two small doors (217) or the fireproof isolation doors at both ends of the ventilation tunnel (4), and the axial flow fan (7) are opened; The air outside the mountain (100) flows through the air filter and enters the side air duct (14), then diffuses into the equipment storage room (12), then enters the shaft exhaust system (200) through the circular through holes or ventilation holes (4) at the installation locations of the two small doors (217), and finally is discharged to the top of the mountain (100) through the shaft exhaust system (200), thereby replacing the air in the equipment storage room (12).

18. The radial cavern data center according to claim 17, characterized in that: Among all the data tunnels (1) in the bottom layer data tunnel group (300), only one data tunnel (1) is allowed to run the ventilation mode at the same time; and among all the data tunnels (1) in the same upper layer data tunnel group (400), only one data tunnel (1) is allowed to run the ventilation mode at the same time.

19. The radial cavern data center according to claim 1, characterized in that: When the data tunnel (1) operates in the fire smoke exhaust mode, the inner end pipe switch B and the exhaust fan B (172) at one end of the lower air duct (17) are first opened, and the outer end pipe switch B and the exhaust fan A (171) at the other end of the lower air duct (17) are closed; The non-combustible gas in the fire extinguishing gas storage bin (23) enters the lower air duct (17) through the concealed pipeline (6) or the fire extinguishing gas delivery pipe, and then enters the equipment storage room (12) from the lower air duct (17) to extinguish the fire. Next, the inner end pipe switch A and the suction fan B (132) at one end of the upper air duct (13) are opened, the outer end pipe switch A and the suction fan A (131) at the other end of the upper air duct (13) are closed, and the axial flow fan (7) is started. The smoke generated during the fire extinguishing process flows through the upper air duct (13) and the ventilation pipe (5) in sequence and then enters the shaft exhaust system (200), and is finally discharged to the top of the mountain (100) through the shaft exhaust system (200).

20. A construction method for a radial cavernous data center according to any one of claims 15 to 19, characterized in that: The following steps are involved: Step 1: Use the partial excavation method to simultaneously construct two through-type data tunnels in the bottom data tunnel group (300) in a double-head excavation manner until the excavation reaches the area where the ventilation hub cavern A (2) is located; Step 2: With the help of the two through-type data tunnels that have been constructed, the ventilation hub cavern A (2) is constructed by using the spherical excavation reserved core soil method, and the initial support layer (211) of the cavern support structure (21) is constructed, and the polygonal steel frame (212), the inscribed circular steel beam A (213), the diamond steel frame (214) and the inscribed circular steel beam B (215) are constructed; Step 3: using an interval skipping construction process, starting from the ventilation hub cavern A (2), excavating a plurality of ventilation cross tunnels (4) in the bottom data tunnel group (300), and then carrying out the secondary lining layer pouring construction of the cavern support structure (21); Step 4: Using an interval-jumping construction process, single-head excavation construction of the intermittent data tunnel in the bottom data tunnel group (300) is carried out from the outside of the mountain (100) until the intermittent data tunnel is connected to the corresponding ventilation cross tunnel (4) in the bottom data tunnel group (300); Step 5: In parallel with step 4, the exhaust shaft (3) is constructed by using the reverse well method, and the two through-type data tunnels that have been connected are used as slag discharge channels; Step 6: When the exhaust shaft (3) is constructed downward from top to bottom to the top elevation of a certain upper data tunnel group (400) in step 5, the corresponding ventilation hub cavern B (9) is expanded and the steel arch frame and diamond-shaped reinforced arch frame (93) are constructed downward section by section; Then, an interval skipping construction process is adopted to carry out excavation and initial support construction of the ventilation cross tunnel (4) in the upper data tunnel group (400), and the secondary lining of the ventilation hub cavern B (9) and the ventilation cross tunnel (4) is integrally cast; After the construction of the intermittent data tunnel in the bottom data tunnel group (300) is completed, the intermittent data tunnel in the upper data tunnel group (400) is constructed by single-head excavation from the outside of the mountain (100) using an interval skipping construction process until the intermittent data tunnel is connected to the corresponding ventilation cross tunnel (4) in the upper data tunnel group (400); Step 7, repeat step 6 to complete the construction of the remaining upper data tunnel groups (400) one by one from top to bottom until the exhaust shaft (3) is connected with the ventilation hub cavern A (2); Step 8: After the civil construction of the data center is completed, the two through-type data tunnels are used as transportation channels to first carry out the internal structure construction and equipment installation of the ventilation hub cavern A (2) and the exhaust shaft (3), and then carry out the internal structure construction and equipment installation of each data tunnel (1).

21. The construction method of the radial cavernous data center according to claim 20, characterized in that: The specific construction process of step 2 includes the following steps: Step A, during the excavation of the ventilation hub cavern A (2), the rock pillar (8) located directly below the exhaust shaft (3) is retained as a temporary support structure, and then the arc-shaped side portion (600) around the rock pillar (8) is excavated in steps to form an arc-shaped excavation surface, and the arc-shaped excavation surface is sprayed with concrete for protection; Step B: After the excavation of the upper step arc-shaped side portion (600) of the ventilation hub cavern A (2) is completed, the polygonal steel frame (212) and the inscribed circular steel beam A (213) at the intersection of the ventilation hub cavern A (2) and the exhaust shaft (3) are immediately constructed, and then the initial support layer (211) at the upper step arc-shaped side portion (600) is constructed, and it is ensured that the top of the initial support layer (211) is firmly welded to the polygonal steel frame (212) and the inscribed circular steel beam A (213), and that the initial support layer (211) is located on the upper step rock surface, and then the contraction foot anchor rod is constructed to lock the arch foot of the initial support layer (211) at the upper step arc-shaped side portion (600); Step C, applying system anchor rods within the range of the arc-shaped side portion (600) of the upper step, and spraying concrete on the arc-shaped excavation surface of the upper step to form a protective structure; Step D: After the shotcrete reaches the designed strength, remove the rock column (8); Step E: excavate the middle step and the lower step of the ventilation hub cavern A (2), and gradually complete the construction of the middle and lower parts of the initial support layer (211) from top to bottom. At the same time, construct a diamond steel frame (214) and an inscribed circular steel beam B (215) at the intersection of the ventilation hub cavern A (2) and the ventilation cross tunnel (4).

22. The construction method of the radial cavernous data center according to claim 20, characterized in that: The method for constructing the exhaust shaft (3) in step 5 comprises the following steps: Step a, excavating a foundation pit on the top of the mountain (100) that covers the distribution range of the decentralized exhaust structure (32); Step b, excavating the centralized air duct section (31) at the bottom of the foundation pit by using the reverse well method until the centralized air duct section (31) is connected with the ventilation hub cavern A (2); Step c, constructing the concrete lining structure of the centralized air duct section (31) from bottom to top; Step d: constructing a broken-line air duct (321) in the foundation pit, then sequentially constructing an explosion-proof plate (322) and a backfill covering layer (323), and finally planting trees around the broken-line air duct (321).

23. The construction method of the radial cavernous data center according to claim 20, characterized in that: The method for constructing the internal structure of the ventilation hub cavern A (2) in step eight comprises the following steps: Step 1: construct a fire extinguishing gas storage bin (23) at the bottom of the inner side of the cavern support structure (21), and install a gas supplementary pipeline and a concealed pipeline (6); Step 2, constructing the air guide duct (24), and then installing an axial flow fan (7) between the air guide duct (24) and the centralized air duct section (31); Step 3, drilling a hole in the air guide pipe (24) and completing the installation of the ventilation pipe (5); Step 4: construct the bottom plate of the equipment warehouse (22).

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