A radiation-type cave data center and its construction method

Abstract

The present invention discloses a radiation-type cavern data center and its construction method, belonging to the technical field of cavern data centers. The data center includes a mountain body and a shaft exhaust system, an underlying data tunnel group, and several upper data tunnel groups arranged in the mountain body. One end of the shaft exhaust system is communicated with the surface of the mountain body. The upper data tunnel groups are located above the underlying data tunnel group. One end of all the data tunnels in the upper data tunnel groups and one end of all the data tunnels in the underlying data tunnel group are both connected to the shaft exhaust system, and the other ends extend in different directions centered on the shaft exhaust system until they are communicated with the surface of the mountain body. The data tunnels adopt a layered + radiation-type layout, enabling all the data tunnels in the entire data center to meet the exhaust and smoke exhaust requirements with only one shaft exhaust system. While significantly increasing the number of data tunnels in the data center, the engineering investment of the data center is reduced.

Description

Technical Field

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

[0002] Due to being entirely buried underground, the cave data center has typical advantages of high security, high concealment, high protection, and high energy efficiency, and thus has become a new direction for the development of data centers. However, considering the relatively closed structure of the cave data center, it is necessary to focus on studying its ventilation requirements during normal operation and smoke exhaust requirements in case of a fire accident.

[0003] For example, the Chinese patent document with the publication number CN116648044A discloses an explosion-proof horizontal ventilation system and a construction method applicable to a cave data center. The explosion-proof horizontal ventilation system includes an upper-layer horizontal exhaust structure, a middle-layer connection structure, and a lower-layer cave data center main structure that are three-dimensional cross-shaped in the upper, middle, and lower layers. The upper-layer horizontal exhaust structure, the middle-layer connection structure, and the lower-layer cave data center main structure are all multi-channel structures. The air inlet port of the lower-layer cave data center main structure is connected to an integrated air supply system, and the air outlet port is interconnected with the upper-layer horizontal exhaust structure through the middle-layer connection structure. It can realize remote and precise control of the air flow inside the data center, and provide a reliable ventilation system for normal ventilation during operation and fire fighting in case of a fire accident.

[0004] However, in this explosion-proof horizontal ventilation system, limited by the layout method of the data center cave chambers, a connection shaft can meet the exhaust requirements of at most four data center cave chambers. When the number of data center cave chambers increases, it is necessary to correspondingly increase the number of connection shafts. However, due to the high construction difficulty and high construction cost of the connection shafts, the increase in their number will inevitably cause a significant increase in the project investment of the entire cave data center. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a radiation-type cave data center and a construction method thereof.

[0006] The present invention is achieved through the following technical solutions:

[0007] A radiation-type cave data center includes a mountain body, a shaft exhaust system, a bottom-layer data tunnel group, and several upper-layer data tunnel groups arranged in the mountain body. One end of the shaft exhaust system is communicated with the surface of the mountain body. The upper-layer data tunnel groups are located above the bottom-layer data tunnel group. One end of all the data tunnels in the upper-layer data tunnel groups and one end of all the data tunnels in the bottom-layer data tunnel group are connected to the shaft exhaust system, and the other ends extend in different directions centered on the shaft exhaust system until they are communicated with the surface of the mountain body.

[0008] The vertical shaft exhaust system includes a ventilation hub chamber A and an exhaust vertical shaft. The exhaust vertical shaft is connected to the ventilation hub chamber A and the top of the mountain body.

[0009] The ventilation hub chamber A includes a chamber support structure, a gas supply pipe, and a guide air pipe. An equipment storage is provided at the top inside the chamber support structure, and a fire extinguishing gas storage is provided at the bottom inside the chamber support structure. One end of the gas supply pipe is connected to the fire extinguishing gas storage, and the other end extends outside the mountain body, and a gas pipe switch is provided at this end. The guide air pipe is located inside the chamber support structure, its lower end is connected to the top plate of the fire extinguishing gas storage, and its upper end extends into the equipment storage.

[0010] The chamber support structure is in an elliptical spherical shape and includes a primary support layer and a secondary lining layer provided inside the primary support layer. The primary support layer is an elliptical spherical steel arch frame structure.

[0011] The fire extinguishing gas storage contains non-combustible gases such as nitrogen, argon, or IG541 mixed gas.

[0012] The exhaust vertical 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 chamber support structure, and the lower end of the centralized air duct section extends into the equipment storage and is connected to the upper end of the guide air pipe through an axial flow fan. The decentralized exhaust structure is connected to the upper end of the centralized air duct section and is connected to the top of the mountain body.

[0013] A polygonal steel frame is provided on the primary support layer at its connection with the centralized air duct section, and an inscribed circle steel beam A is provided inside the polygonal steel frame.

[0014] The decentralized exhaust structure includes an explosion-proof plate, a backfill covering layer, and multiple zigzag air ducts. The explosion-proof plate is provided inside the mountain body and is located directly above the centralized air duct section, and the burial depth of the explosion-proof plate inside the mountain body is not less than 5 m. The backfill covering layer is provided on the explosion-proof plate. One end of each of the multiple zigzag air ducts is connected to the upper end of the centralized air duct section, and the other end is exposed as an air outlet at the top of the mountain body and is irregularly distributed around the centralized air duct section. Trees are planted around the zigzag air ducts at the top of the mountain body.

[0015] One end of all the data tunnels in the underlying data tunnel group is connected to the ventilation hub chamber A;

[0016] 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 in the transverse direction of the mountain body. One end of each of the two through-type data tunnels close to each other is connected to the chamber support structure, and a fire isolation door is provided at the connection between the through-type data tunnel and the chamber support structure. One end of each of the several intermittent data tunnels is respectively connected to the chamber support structure through a ventilation cross-tunnel, and the connection between the ventilation cross-tunnel and the chamber support structure is located between the equipment warehouse and the fire extinguishing gas storage warehouse. Fire isolation doors are provided at both ends of the ventilation cross-tunnel.

[0017] The length of the ventilation cross-tunnel is between 10 m and 20 m, and the cross-sectional area is between 10 m 2 ~15 m 2 and.

[0018] A diamond-shaped steel frame is provided on the initial support layer at its connection with the ventilation cross-tunnel, and an inscribed circle steel beam B is provided inside the diamond-shaped steel frame;

[0019] The fire isolation door at the connection between the through-type data tunnel and the chamber 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 opened at the closing seam of the two large doors. The circular through-hole is arranged at the same elevation as the ventilation cross-tunnel, and the diameter of the circular through-hole is the same as the inner diameter of the ventilation cross-tunnel. The two small doors are arranged at the circular through-hole and form a closure for it.

[0020] Air inlets are provided on the air duct at positions corresponding to the ventilation cross-tunnel and the circular through-hole one by one, and air dampers are provided at the air inlets;

[0021] 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 warehouse gradually expand from top to bottom.

[0022] Both the through-type data tunnel and the intermittent data tunnel include data chambers. An upper air duct is provided at the top inside the data chamber, a lower air duct is provided at the bottom, and side air ducts are provided on both the left and right sides. An air-conditioning temperature control room and an equipment storage room are provided in the space surrounded by the upper air duct, the lower air duct and the side air ducts. An air-conditioning unit is provided in the air-conditioning temperature control room and is arranged at one end of the data chamber far from the ventilation hub chamber A. IT equipment is provided in the equipment storage room;

[0023] One end of the upper air duct is connected to the air-conditioning unit in the air-conditioning temperature control room, and an outer end pipe switch A and a suction fan A are provided at this end. The other end is connected to the air duct through a ventilation pipe, and an inner end pipe switch A and a suction fan B are provided at this end;

[0024] One end of the lower air duct is connected to the air conditioner unit in the air-conditioning temperature control room, and an external end pipe switch B and an exhaust fan A are provided at this end. The other end is connected to the fire extinguishing gas storage bin through a buried pipe, and an internal end pipe switch B and an exhaust fan B are provided at this end;

[0025] One end of the side air duct is connected to the outside of the mountain, and an external end pipe switch C and an air filter are provided at this end. The other end is connected to one end face of the data chamber close to the ventilation hub chamber A;

[0026] A plurality of ventilation holes are opened on the side walls of the upper air duct, the lower air duct and the side air duct to communicate with the equipment storage room.

[0027] An explosion-proof isolation door is provided at one end of the data chamber away from the ventilation hub chamber A, and a fire-proof isolation door is provided between the air-conditioning temperature control room and the equipment storage room;

[0028] Two rows of IT equipment are provided in the equipment storage room, and an aisle is left between the two rows of IT equipment.

[0029] A plurality of ventilation hub chambers B are provided on the centralized air duct section at positions corresponding to a plurality of upper-layer data tunnel groups one by one. Anti-falling nets are provided within 1 m below each ventilation hub chamber B in the centralized air duct section, and axial fans are provided above each ventilation hub chamber B.

[0030] Steel arch frames are provided in the ventilation hub chamber B. The steel arch frames include a plurality of annular arch frames arranged coaxially, and a plurality of vertical connecting arch frames are connected together between the plurality of annular arch frames.

[0031] The upper-layer data tunnel group includes a plurality of discontinuous data tunnels. One end of each of the plurality of discontinuous data tunnels is respectively connected to the ventilation hub chamber B and the steel arch frame through a ventilation cross tunnel, and a diamond-shaped strengthening arch frame is provided outside the ventilation cross tunnel on the steel arch frame;

[0032] One end of each of the plurality of discontinuous data tunnels close to the ventilation hub chamber B on the lower air duct is respectively connected to the fire extinguishing gas storage bin through a fire extinguishing gas delivery pipe.

[0033] When the data tunnel operates in the temperature control mode, start the air conditioner unit in the air-conditioning temperature control room, open the external end pipe switch A and the suction fan A at one end of the upper air duct, and close the internal end pipe switch A and the suction fan B at the other end of the upper air duct. Open the external end pipe switch B and the exhaust fan A at one end of the lower air duct, and close the internal end pipe switch B and the exhaust fan B at the other end of the lower air duct;

[0034] After the hot air in the upper air duct enters the air conditioner unit, it is cooled to form cold air by the air conditioner unit. 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 during operation and forms hot air that enters the upper air duct. This cycle repeats to achieve the purpose of controlling the temperature inside the equipment storage room.

[0035] When the data tunnel operates in the ventilation mode, open the outer end pipe switch C, two small doors, or the fire isolation doors at both ends of the ventilation cross tunnel, and the axial flow fan;

[0036] The air outside the mountain flows through the air filter and then enters the side air duct, and then diffuses into the equipment storage room. Next, it enters the shaft exhaust system through the circular through holes at the installation location of the two small doors or the ventilation cross tunnel, and finally is discharged to the top of the mountain through the shaft exhaust system to achieve the replacement of the air inside the equipment storage room.

[0037] Only one data tunnel in all the data tunnels in the bottom-layer data tunnel group is allowed to operate in the ventilation mode at the same time, and only one data tunnel in all the data tunnels in the same upper-layer data tunnel group is allowed to operate in the ventilation mode at the same time.

[0038] When the data tunnel operates in the fire exhaust mode, first open the inner end pipe switch B and the exhaust fan B at one end of the lower air duct, and close the outer end pipe switch B and the exhaust fan A at the other end of the lower air duct;

[0039] The non-combustible gas in the fire extinguishing gas storage bin enters the lower air duct through the buried pipe or the 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 sequence and then enters the shaft exhaust system, and finally is discharged to the top of the mountain through the shaft exhaust system.

[0040] A construction method for a radiation-type cave data center includes the following steps:

[0041] Step 1: Adopt the sectional excavation method and simultaneously construct two through-type data tunnels in the bottom-layer data tunnel group in a double-heading tunneling manner until the excavation reaches the range where the ventilation hub chamber A is located;

[0042] Step 2: Relying on the two already constructed through-type data tunnels, use the spherical excavation method with reserved core soil to construct the ventilation hub chamber A, and carry out the initial support layer construction of the chamber support structure, and the construction of the polygonal steel frame, the inscribed circle steel beam A, the rhombic steel frame, and the inscribed circle steel beam B;

[0043] Step 3: Adopt an intermittent skip construction process. Start excavating multiple ventilation cross tunnels in the underlying data tunnel group from the ventilation hub chamber A, and then carry out the pouring construction of the secondary lining layer of the chamber support structure.

[0044] Step 4: Adopt an intermittent skip construction process. Carry out single-heading tunneling construction of the intermittent data tunnels in the underlying data tunnel group from outside the mountain until the intermittent data tunnels are connected to the corresponding ventilation cross tunnels in the underlying data tunnel group.

[0045] Step 5: Synchronously with Step 4, adopt the raise boring method to construct the exhaust shaft, and use the two already penetrated through-type data tunnels as muck removal channels.

[0046] Step 6: When the exhaust shaft is constructed from top to bottom to the top elevation position of a certain upper data tunnel group in Step 5, expand and excavate the corresponding ventilation hub chamber B, and construct the steel arch and diamond-shaped reinforced arch section by section downward.

[0047] Then adopt an intermittent skip construction process to carry out the excavation and initial support construction of the ventilation cross tunnels in the upper data tunnel group, and integrally pour the secondary lining of the ventilation hub chamber B and the ventilation cross tunnels.

[0048] After the construction of the intermittent data tunnels in the underlying data tunnel group is completed, adopt an intermittent skip construction process to start single-heading tunneling construction of the intermittent data tunnels in the upper data tunnel group from outside the mountain until the intermittent data tunnels are connected to the corresponding ventilation cross tunnels in the upper data tunnel group.

[0049] 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 to the ventilation hub chamber A.

[0050] Step 8: After the civil engineering structure construction of the data center is completed, use the two through-type data tunnels as transportation channels. First, carry out the internal structure construction and equipment installation work of the ventilation hub chamber A and the exhaust shaft, and then carry out the internal structure construction and equipment installation work of each data tunnel.

[0051] The specific construction process of Step 2 includes the following steps:

[0052] Step A: During the excavation of the ventilation hub chamber A, retain the rock pillar directly below the exhaust shaft as a temporary support structure, then excavate the arc-shaped side part around the rock pillar in steps to form an arc-shaped excavation surface, and carry out shotcrete protection on the arc-shaped excavation surface.

[0053] Step B: After the excavation of the upper-step arc side of the ventilation hub chamber A is completed, immediately construct the polygonal steel frame and the inscribed circle steel beam A at the intersection of the ventilation hub chamber A and the exhaust shaft, and then construct the primary support layer at the upper-step arc side, ensuring that the top of the primary support layer is firmly welded to the polygonal steel frame and the inscribed circle steel beam A, ensuring that the primary support layer is located on the upper-step rock surface, and then construct retracted-foot bolts to lock the arch feet of the primary support layer at the upper-step arc side;

[0054] Step C: Install systematic bolts within the range of the upper-step arc side, and spray concrete on the arc excavation surface of the upper step to form a protective structure;

[0055] Step D: After the sprayed concrete reaches the design strength, excavate the rock pillar;

[0056] Step E: Excavate the middle step and the lower step of the ventilation hub chamber A, and gradually complete the construction of the middle and lower parts of the primary support layer from top to bottom. At the same time, construct a diamond-shaped steel frame and an inscribed circle steel beam B at the intersection of the ventilation hub chamber A and the ventilation cross-tunnel.

[0057] The method for constructing the exhaust shaft in Step 5 includes the following steps:

[0058] Step a: Excavate a foundation pit covering the distribution range of the decentralized exhaust structure at the top of the mountain;

[0059] Step b: Use the raise boring method to excavate the centralized air duct section at the bottom of the foundation pit until the centralized air duct section communicates with the ventilation hub chamber A;

[0060] Step c: Construct the concrete lining structure of the centralized air duct section from bottom to top;

[0061] Step d: Construct the zigzag air duct in the foundation pit, then construct the explosion-proof plate and the backfill covering layer in sequence, and finally plant trees around the zigzag air duct.

[0062] The method for constructing the internal structure of the ventilation hub chamber A in Step 8 includes the following steps:

[0063] Step 1: Construct the fire extinguishing gas storage bin at the inner bottom of the chamber support structure, and install the gas replenishment pipeline and the buried pipeline;

[0064] Step 2: Construct the air duct, and then install an axial flow fan between the air duct and the centralized air duct section;

[0065] Step 3: Drill holes in the air duct and complete the installation of the ventilation pipe;

[0066] Step 4: Construct the bottom plate of the equipment bin.

[0067] The beneficial effects of the present invention are as follows:

[0068] 1. When all the data tunnels in the underlying data tunnel group adopt a radial layout, only one shaft exhaust system is needed to meet the exhaust requirements of all the data tunnels in the underlying data tunnel group. While in the present invention, the number of data tunnels included in the underlying data tunnel group is far greater than four, and the number of shaft exhaust systems in the cavern-type data center is controlled to be one, which greatly reduces the engineering investment of the cavern-type data center.

[0069] 2. When the radial cavern-type data center includes an upper-layer data tunnel group, all the data tunnels with a radial layout in the underlying data tunnel group share one shaft exhaust system with all the data tunnels with a radial layout in the upper-layer data tunnel group. Only one shaft exhaust system is needed to meet the exhaust requirements of all the data tunnels in the multi-layer data tunnel group. That is to say, with this hierarchical + radial layout of the data tunnels, while increasing the number of data tunnels in the data center, the engineering investment of the cavern-type data center is further reduced.

[0070] 3. An intersection connected to the exhaust shaft is arranged at the top of the chamber support structure, and a strengthening structure of "polygonal steel frame + inscribed circle steel beam A" is arranged at the intersection; an intersection connected to the ventilation cross-tunnel is arranged on the side wall of the chamber support structure, and a strengthening structure of "rhombic steel frame + inscribed circle steel beam B" is arranged at the intersection; through these two strengthening structures, the force-bearing reliability of the chamber support structure in the case of multiple three-dimensional intersections is ensured. And the secondary lining layer inside the primary support layer serves as the permanent support to ensure the structural stability of the ventilation hub chamber A.

[0071] 4. When operating in the temperature control mode, the shaft exhaust system is not required to participate in the operation. Therefore, the shaft exhaust system only participates in the operation in the ventilation mode or the fire smoke exhaust mode; and the ventilation modes of each data tunnel can be staggered in time, so a single shaft exhaust system can meet the ventilation requirements of all the data tunnels; at the same time, since all the 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 requirements. Thus, it can be seen that adopting the internal circulation temperature control mode reduces the utilization rate of the shaft exhaust system by the data tunnels, thereby ensuring the feasibility of a single shaft exhaust system to meet the exhaust and smoke exhaust of the data center.

[0072] 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 air and operate normally, 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 body is set to be not less than 5 m to ensure that the decentralized exhaust structure has good explosion-proof performance. The backfill covering layer is mainly used to restore the ground surface around the decentralized exhaust structure. Together with the trees planted around the zigzag air ducts, it achieves the purpose of concealing the position of the exhaust shaft.

[0073] 6. By controlling the opening and closing of the air inlet through the air damper, it can avoid the problem of air leakage between multiple data tunnels and achieve the ventilation control of single and multiple data tunnels. The shape and size of the outer wall of the air guide pipe between the top of the air inlet and the fire extinguishing gas storage bin gradually expand from top to bottom, so as to smoothly divert the air flow discharged from the ventilation cross tunnel to the inside of the air guide pipe through the outer wall of the air guide pipe. Together with the axial flow fan, it can quickly suck and divert the air discharged from the data tunnel into the air guide pipe.

[0074] 7. The spherical excavation method with reserved core soil is used for excavation, which can preferably reserve the rock pillar directly below the exhaust shaft as a temporary support structure, thus effectively reducing the risk of arch collapse during the excavation of large-sized chambers.

[0075] 8. When the reverse shaft method is used to construct the exhaust shaft, the muck can directly slide down through the pre-constructed drilling channel to the ventilation hub chamber A, which is conducive to the rapid transportation of the muck; moreover, the groundwater gushing out during the construction of the exhaust shaft can also infiltrate through the drilling channel, reducing the construction risk of the exhaust shaft; in addition, under the action of the pressure difference, the air flow can naturally flow into the exhaust shaft through the data tunnel, the ventilation hub chamber A and the drilling channel and be discharged upward, which is conducive to the construction ventilation during the excavation of the exhaust shaft. Description of the Drawings

[0076] Figure 1 It is a cross-sectional view of the present invention when there is an upper-layer data tunnel group;

[0077] Figure 2 It is a plan layout diagram of the mountain body, the data tunnel and the shaft exhaust system of the present invention when there is an upper-layer data tunnel group;

[0078] Figure 3 It is a cross-sectional view of the present invention when there is no upper-layer data tunnel group;

[0079] Figure 4 It is a plan layout diagram of the mountain body, the data tunnel and the shaft exhaust system of the present invention when there is no upper-layer data tunnel group;

[0080] Figure 5 It is a schematic structural diagram of the present invention when there is no upper-layer data tunnel group and the air change mode is running;

[0081] Figure 6 This is a schematic structural diagram of the present invention without an upper-layer data tunnel group and operating in the fire exhaust mode.

[0082] Figure 7 This is a schematic structural diagram of the present invention without an upper-layer data tunnel group and operating in the temperature control mode.

[0083] Figure 8 This is a schematic assembly structure diagram of the intermittent data tunnel, ventilation hub chamber A, and centralized air duct section of the present invention.

[0084] Figure 9 This is a schematic assembly structure diagram of the through-type data tunnel, primary support layer, large door, small door, ventilation pipe, and exhaust shaft of the present invention.

[0085] Figure 10 This is a schematic assembly structure diagram of the intermittent data tunnel, primary support layer, ventilation pipe, diamond steel frame, inscribed circle steel beam B, and exhaust shaft of the present invention.

[0086] Figure 11 This is a schematic horizontal layout diagram of the data tunnel of the present invention.

[0087] Figure 12 This is a schematic structural diagram of the rock pillar and arc side part of the present invention.

[0088] Figure 13 This is a schematic structural diagram of the air guide pipe of the present invention.

[0089] Figure 14 This is a schematic assembly structure diagram of the polygonal steel frame and inscribed circle steel beam A of the present invention.

[0090] Figure 15 This is a schematic diagram of the centralized air duct section and the folded air duct of the present invention.

[0091] Figure 16 This is an unfolded view of the assembled steel arch and ventilation cross-tunnel of the present invention.

[0092] Figure 17 This is a schematic assembly structure diagram of the data tunnel, ventilation hub chamber B, ventilation cross-tunnel, ventilation pipe, buried pipeline, centralized air duct section, axial flow fan, and anti-falling net of the present invention.

[0093] In the figure: 100 - mountain body, 200 - shaft exhaust system, 300 - bottom-layer data tunnel group, 400 - upper-layer data tunnel group, 500 - anti-falling net, 600 - arc side part;

[0094] 1 - Data tunnel, 2 - Ventilation hub chamber A, 21 - Chamber support structure, 211 - Initial support layer, 212 - Polygonal steel frame, 213 - Inscribed circle steel beam A, 214 - Rhombic steel frame, 215 - Inscribed circle steel beam B, 216 - Main door, 217 - Small door, 22 - Equipment storage, 23 - Fire extinguishing gas storage, 24 - Air duct, 241 - Air inlet, 3 - Exhaust shaft, 31 - Centralized air duct section, 32 - Decentralized exhaust structure, 321 - Zigzag air duct, 322 - Explosion-proof plate, 323 - Backfill covering layer, 4 - Ventilation cross tunnel, 5 - Ventilation pipe, 6 - Buried pipeline, 7 - Axial flow fan, 8 - Rock pillar, 9 - Ventilation hub chamber B, 91 - Ring arch, 92 - Vertical connecting arch, 93 - Rhombic strengthening arch, 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 - Corridor, 17 - Lower air duct, 171 - Exhaust fan A, 172 - Exhaust fan B. Detailed implementation mode

[0095] The technical solution of the present invention will be further described below, but the scope of protection is not limited thereto.

[0096] Embodiment 1:

[0097] A radiation-type cave depot data center according to the present invention includes a mountain body 100 and a shaft exhaust system 200, a bottom-layer data tunnel group 300 and several upper-layer data tunnel groups 400 provided in the mountain body 100. One end of the shaft exhaust system 200 is communicated with the surface of the mountain body 100. The upper-layer data tunnel groups 400 are located above the bottom-layer data tunnel group 300. One end of all the data tunnels 1 in the upper-layer data tunnel groups 400 and one end of all the data tunnels 1 in the bottom-layer data tunnel group 300 are all connected to the shaft exhaust system 200, and the other ends all extend in different directions centered on the shaft exhaust system 200 until they are communicated with the surface of the mountain body 100.

[0098] When the radiation-type cave depot data center does not include the upper-layer data tunnel groups 400, the structure is as shown in Figure 3 and Figure 4 shown. Among them, all the data tunnels 1 included in the bottom-layer data tunnel group 300 extend and radiate in different directions centered on the shaft exhaust system 200. That is to say, when all the data tunnels 1 in the bottom-layer data tunnel group 300 adopt this radiation-type layout method, only one shaft exhaust system 200 is required to meet the exhaust requirements of all the data tunnels 1 in the bottom-layer data tunnel group 300. From Figure 4It can be intuitively seen that while the number of data tunnels 1 included in the underlying data tunnel group 300 of the present invention is much larger than four, the number of shaft exhaust systems 200 of the cavernous data center is controlled to one, greatly reducing the engineering investment of the cavernous data center.

[0099] The structure of the radial cavernous data center when there is an upper data tunnel group 400 is as Figure 1 and Figure 2 shown. Among them, all the data tunnels 1 arranged in a radial layout in the underlying data tunnel group 300 share a shaft exhaust system 200 with all the data tunnels 1 arranged in a radial layout in the upper data tunnel group 400. Only one shaft exhaust system 200 is needed to meet the exhaust requirements of all the data tunnels 1 in the multi-layer data tunnel group. That is to say, with this hierarchical + radial layout of the data tunnels 1, while increasing the number of data tunnels 1 in the data center, the engineering investment of the cavernous data center is further reduced.

[0100] When there are multiple upper data tunnel groups 400 in the radial cavernous data center, it is similar to the case when there is one upper data tunnel group 400 in the radial cavernous data center, and will not be elaborated here.

[0101] As Figure 2 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 arranged in a staggered manner in space to ensure the structural stability of the data tunnels 1.

[0102] The shaft exhaust system 200 includes a ventilation hub chamber A2 and an exhaust shaft 3. The exhaust shaft 3 is connected to the ventilation hub chamber A2 and the top of the mountain body 100. In use, the shaft exhaust system 200 is arranged at a relatively central position within the mountain body 100. The ventilation hub chamber A2 is used to collect the wind and smoke discharged from all the data tunnels 1 in the underlying 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 discharged from all the data tunnels 1 in the upper data tunnel group 400, and discharge all the wind and smoke to the top of the mountain body 100.

[0103] The ventilation hub chamber A2 includes a chamber support structure 21, a gas supply pipeline, and a duct 24. An equipment warehouse 22 is provided at the top inside the chamber support structure 21, and a fire extinguishing gas storage warehouse 23 is provided at the bottom inside the chamber support structure 21. One end of the gas supply pipeline is connected to the roof of the fire extinguishing gas storage warehouse 23, and the other end extends outside the mountain body 100, and a gas pipeline switch is provided at this end. The duct 24 is located inside the chamber support structure 21, its lower end is connected to the fire extinguishing gas storage warehouse 23, and its upper end extends into the equipment warehouse 22. In use, the gas supply pipeline serves as a supplementary pipeline for non-combustible gas in the fire extinguishing gas storage warehouse 23.

[0104] The chamber support structure 21 is in an elliptical spherical shape, including a primary support layer 211 and a secondary lining layer provided on the inner side of the primary support layer 211. The primary support layer 211 is an elliptical spherical steel arch structure. During use, the chamber support structure 21 is in an elliptical spherical shape and adopts an elliptical spherical frame layout, that is, each arch is centered on the center of the elliptical sphere. At the top of the chamber support structure 21, there is an intersection connected to the exhaust shaft 3, and a strengthening structure of "polygonal steel frame 212 + inscribed circle steel beam A213" is arranged at the intersection; on the side wall of the chamber support structure 21, there is an intersection connected to the ventilation cross-tunnel 4, and a strengthening structure of "rhombic steel frame 214 + inscribed circle steel beam B215" is arranged at the intersection; through these two strengthening structures, the force reliability of the chamber support structure 21 under the condition of multiple three-dimensional intersections is ensured. And the secondary lining layer inside the primary support layer 211 serves as a permanent support to ensure the structural stability of the ventilation hub chamber A2.

[0105] The fire extinguishing gas storage bin 23 is provided with non-combustible gases such as nitrogen, argon or IG541 mixed gas.

[0106] As Figure 5 、 Figure 6 and Figure 8 As shown in

[0107] As Figure 14 shown, on the primary support layer 211, a polygonal steel frame 212 is provided at the connection thereof with the centralized air duct section 31, and an inscribed circle steel beam A213 is provided inside the polygonal steel frame 212.

[0108] As Figure 6 and Figure 15As shown in the figure, the decentralized exhaust structure 32 includes an explosion-proof plate 322, a backfill covering layer 323, and multiple zigzag air ducts 321. The explosion-proof plate 322 is provided in the mountain body 100 and is located directly above the centralized air duct section 31. The burial depth of the explosion-proof plate 322 in the mountain body 100 is not less than 5m. The backfill covering layer 323 is provided on the explosion-proof plate 322. One ends of the multiple 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 body 100 as air outlets and are irregularly distributed around the centralized air duct section 31. Trees are planted around the zigzag air ducts 321 on the top of the mountain body 100. During use, the decentralized exhaust structure 32 includes multiple zigzag air ducts 321. When some of the zigzag air ducts 321 are damaged and blocked, it ensures that the exhaust shaft 3 can still exhaust air and operate normally, 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 burial depth of the explosion-proof plate 322 in the mountain body 100 is set to be not 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 ground surface around the decentralized exhaust structure 32. Cooperating with the trees planted around the zigzag air ducts 321, it achieves the purpose of concealing the position of the exhaust shaft 3.

[0109] One ends of all the data tunnels 1 in the underlying data tunnel group 300 are all connected to the ventilation hub chamber A2;

[0110] The data tunnels 1 have two types: through data tunnels and discontinuous data tunnels. The underlying data tunnel group 300 includes two through data tunnels and several discontinuous data tunnels. The two through data tunnels are arranged along the same straight line and are arranged horizontally along the mountain body 100. One ends of the two through data tunnels that are close to each other are all connected to the tunnel support structure 21, and a fire isolation door is provided at the connection between the through data tunnel and the tunnel support structure 21. One ends of several discontinuous data tunnels are respectively connected to the tunnel support structure 21 through the ventilation cross tunnel 4, and the connection between the ventilation cross tunnel 4 and the tunnel support structure 21 is located between the equipment warehouse 22 and the fire extinguishing gas storage warehouse 23. Fire isolation doors are provided at both ends of the ventilation cross tunnel 4. During use, since the ventilation hub chamber A2 and the shaft exhaust system 200 need to be constructed by means of two through data tunnels, the through data tunnels are arranged at a relatively narrow position of the mountain body 100 to minimize the total length of the two through data tunnels and achieve the purpose of shortening the construction period.

[0111] The length of the ventilation cross tunnel 4 is between 10m and 20m, and the cross-sectional area is between 10m 2 ~15m 2Between. During use, the ventilation cross tunnel 4 serves as a connection passage between the intermittent data tunnel and the ventilation hub chamber A2, and its length is controlled within 10m to 20m. If it is too long, it will compress the length of the intermittent data tunnel and reduce the installation space for IT equipment in the intermittent data tunnel. If it is too short, it will affect the stability of the ventilation hub chamber A2; the cross-sectional area of the ventilation cross tunnel 4 is between 10m 2 ~15m 2 Between. A too large cross-section will affect the stability of the ventilation hub chamber A2, and a too small cross-section will affect its ventilation efficiency. To avoid the problem of turbulent flow when the wind flows from the large cross-section of the intermittent data tunnel into the small cross-section of the ventilation cross tunnel, a trumpet-shaped deflector can be set at one end of the ventilation cross tunnel 4 close to the intermittent data tunnel.

[0112] Such as Figure 10 As shown, a diamond-shaped steel frame 214 is provided at the connection between the initial support layer 211 and the ventilation cross tunnel 4, and an inscribed circle steel beam B215 is provided inside the diamond-shaped steel frame 214;

[0113] Such as Figure 9 As shown, the fire isolation door at the connection between the through-type data tunnel and the chamber 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 jointly opened at the closing seam of the two large doors 216. The circular through-hole is arranged at the same elevation as the ventilation cross tunnel 4, and the diameter of the circular through-hole is the same as the inner diameter of the ventilation cross tunnel 4. The two small doors 217 are arranged at the circular through-hole and form a closure for it. When the two large doors 216 are opened, they are only used as the inlet and outlet for large equipment in the ventilation hub chamber A2 and are closed daily; the two small doors 217 are used as ventilation openings and are opened and closed as needed.

[0114] Such as Figure 13 As shown, air inlets 241 are provided at corresponding positions on the air duct 24 corresponding to the ventilation cross tunnel 4 and the circular through-hole, and air doors are provided at the air inlets 241;

[0115] The outer wall of the air duct 24 between the top of the air inlet 241 and the fire extinguishing gas storage bin 23 gradually expands in shape and size from top to bottom. During use, by controlling the opening and closing of the air inlet 241 through the air door, the problem of air leakage between multiple data tunnels 1 can be avoided, and the ventilation control of single and multiple data tunnels 1 can be realized. The outer wall of the air duct 24 between the top of the air inlet 241 and the fire extinguishing gas storage bin 23 gradually expands in shape and size from top to bottom, so as to smoothly divert the air flow discharged from the ventilation cross tunnel 4 into the air duct 24 through the outer wall of the air duct 24, and cooperate with the axial flow fan 7 to quickly suck and divert the air discharged from the data tunnel 1 into the air duct 24.

[0116] Such as Figure 11As shown in the figure, both the through - type data tunnel and the discontinuous data tunnel include data chambers. At the top inside the data chamber, there is an upper air duct 13, at the bottom there is a lower air duct 17, and on both the left and right sides there are side air ducts 14. Inside the space enclosed by the upper air duct 13, the lower air duct 17, and the side air ducts 14, there are an air - conditioning temperature - control room 11 and an equipment storage room 12. Inside the air - conditioning temperature - control room 11, there is an air - conditioning unit, which is arranged at one end of the data chamber far from the ventilation hub chamber A2. Inside the equipment storage room 12, there are IT devices;

[0117] One end of the upper air duct 13 is connected to the air - conditioning unit inside the air - conditioning temperature - control room 11, and at this end, there is an outer - end pipe switch A and a suction fan A131. The other end is connected to the guide air duct 24 through the ventilation pipe 5, and at this end, there is an inner - end pipe switch A and a suction fan B132;

[0118] One end of the lower air duct 17 is connected to the air - conditioning unit inside the air - conditioning temperature - control room 11, and at this end, there is an outer - end pipe switch B and an exhaust fan A171. The other end is connected to the fire - extinguishing gas storage bin 23 through the buried pipe 6, and at this end, there is an inner - end pipe switch B and an exhaust fan B172;

[0119] One end of the side air duct 14 is connected to the outside of the mountain body 100, and at this end, there is an outer - end pipe switch C and an air filter. The other end is connected to the end face of the data chamber near the ventilation hub chamber A2;

[0120] On the side walls of the upper air duct 13, the lower air duct 17, and the side air duct 14, there are a plurality of ventilation holes communicating with the equipment storage room 12. During use, an air filter is set at the end where the side air duct 14 is connected to the outside of the mountain body 100, so as to filter out particles such as dust in the air entering the data tunnel 1 through the air filter and adjust the air humidity to the range required by the data center. The air - conditioning temperature - control room 11 is arranged at one end of the data chamber far from the ventilation hub chamber A2, which is convenient for the internal air - conditioning unit to dissipate heat.

[0121] At one end of the data chamber far from the ventilation hub chamber A2, there is an explosion - proof isolation door, and between the air - conditioning temperature - control room 11 and the equipment storage room 12, there is a fire - proof isolation door;

[0122] The equipment storage room 12 is provided with two rows of IT devices, and there is an aisle 16 left between the two rows of IT devices. Setting the aisle 16 between the two rows of IT devices is convenient for the staff to pass through.

[0123] As Figure 17As shown in the figure, a plurality of ventilation hub chambers B9 are provided on the centralized air duct section 31 at positions corresponding to a plurality of upper-layer data tunnel groups 400 one by one. And within the centralized air duct section 31, anti-falling nets 500 are provided within a range of 1 m below each ventilation hub chamber B9, and axial fans 7 are provided above each ventilation hub chamber B9. The ventilation hub chamber B9 is used to collect the wind and smoke discharged from all the data tunnels 1 in a corresponding upper-layer data tunnel group 400. The anti-falling net 500 is set within a range of 1 m below it to eliminate the risk of personnel falling.

[0124] As Figure 16 shown in the figure, a steel arch frame is provided inside the ventilation hub chamber B9. The steel arch frame includes a plurality of annular arch frames 91 arranged coaxially, and a plurality of vertical connecting arch frames 92 are connected together between the plurality of annular arch frames 91.

[0125] The upper-layer data tunnel group 400 includes a plurality of intermittent data tunnels. One ends of the plurality of intermittent data tunnels are respectively connected to the ventilation hub chamber B9 and the steel arch frame through ventilation cross tunnels 4, and diamond-shaped strengthening arch frames 93 are provided on the steel arch frame outside the ventilation cross tunnels 4;

[0126] One ends of the lower air ducts 17 of the plurality of intermittent data tunnels close to the ventilation hub chamber B9 are respectively connected to the fire extinguishing gas storage bin 23 through fire extinguishing gas delivery pipes. Diamond-shaped strengthening arch frames 93 are provided on the steel arch frame outside the ventilation cross tunnels 4 to improve the structural strength at the intersection of the ventilation cross tunnels 4 and the steel arch frame through the diamond-shaped strengthening arch frames 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.

[0127] As Figure 7 shown in the figure, when the data tunnel 1 operates in the temperature control mode, start the air-conditioning unit in the air-conditioning temperature control chamber 11, open the outer end pipe switch A and the suction fan A131 at one end of the upper air duct 13, and close the inner end pipe switch A and the suction fan B132 at the other end of the upper air duct 13. Open the outer end pipe switch B and the exhaust fan A171 at one end of the lower air duct 17, and close the inner end pipe switch B and the exhaust fan B172 at the other end of the lower air duct 17;

[0128] 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, which enters the upper air duct 13. In this way, the cycle repeats to achieve the purpose of controlling the temperature inside the equipment storage room 12. By adopting the internal circulation temperature control mode, the air in the equipment storage room 12 is gradually cooled by the air-conditioning unit to achieve the purpose of cooling the air in the data tunnel 1 and the IT equipment. When the temperature control mode is running, the shaft exhaust system 200 does not need to participate in the work. Therefore, the shaft exhaust system 200 only participates in the work when the ventilation mode or the fire smoke exhaust mode is running; and the ventilation modes of each data tunnel 1 can be staggered in time, so a single shaft exhaust system 200 can meet the ventilation requirements 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 requirements. Thus, it can be seen that by adopting the internal circulation temperature control mode, the utilization rate of the shaft exhaust system 200 by the data tunnel 1 is reduced, thereby ensuring the feasibility of a single shaft exhaust system 200 to meet the exhaust and smoke exhaust of the data center.

[0129] As Figure 5 shown, when the data tunnel 1 operates in the ventilation mode, the external end pipe switch C, two small doors 217 or the fire isolation doors at both ends of the ventilation cross tunnel 4 and the axial flow fan 7 are opened;

[0130] The air outside the mountain body 100 flows through the air filter and then enters the side air duct 14, and then diffuses into the equipment storage room 12. Next, it enters the shaft exhaust system 200 through the circular through hole at the installation position of the two small doors 217 or the ventilation cross tunnel 4, and finally is discharged to the top of the mountain body 100 through the shaft exhaust system 200 to realize the replacement of 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 body 100 as the air inlet, and at the same time uses the shaft exhaust system 200 to discharge the air inside it to realize the replacement of the air inside the equipment storage room 12.

[0131] Only one data tunnel 1 in all the data tunnels 1 in the bottom data tunnel group 300 is allowed to operate in the ventilation mode at the same time, and only one data tunnel 1 in all the data tunnels 1 in the same upper data tunnel group 400 is allowed to operate in the ventilation mode at the same time. This avoids cross-airflow between the data tunnels 1.

[0132] As Figure 6 shown, when the data tunnel 1 operates in the fire smoke exhaust mode, first open the internal end pipe switch B and the exhaust fan B172 at one end of the lower air duct 17, and close the external end pipe switch B and the exhaust fan A171 at the other end of the lower air duct 17;

[0133] 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.

[0134] A construction method for a radial cavernous data center comprises the following steps:

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] The specific construction process of the second step includes the following steps:

[0146] As Figure 12 shown, in step A, during the excavation of the ventilation hub chamber A2, the rock pillar 8 directly below the exhaust shaft 3 is retained as a temporary support structure, and then the arc-shaped side part 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.

[0147] Step B: After the excavation of the upper-step arc-shaped side part 600 of the ventilation hub chamber A2 is completed, immediately construct the polygonal steel frame 212 and the inscribed circle steel beam A213 at the intersection of the ventilation hub chamber A2 and the exhaust shaft 3, and then construct the initial support layer 211 at the upper-step arc-shaped side part 600, and ensure that the top of the initial support layer 211 is firmly welded to the polygonal steel frame 212 and the inscribed circle steel beam A213, ensure that the initial support layer 211 is located on the upper-step rock surface, and then construct retracted-foot anchor bolts to lock the arch feet of the initial support layer 211 at the upper-step arc-shaped side part 600.

[0148] Step C: Install systematic anchor bolts within the range of the upper-step arc-shaped side part 600, and spray concrete on the arc-shaped excavation surface of the upper step to form a protective structure.

[0149] Step D: After the sprayed concrete reaches the design strength, excavate the rock pillar 8. During the excavation of the rock pillar 8, it is necessary to strengthen the construction monitoring and measurement. If obvious settlement and deformation occur, temporary vertical supports should be constructed in a timely manner to support the earth and rock mass above the ventilation hub chamber A2, and surrounding rock grouting reinforcement operations should be carried out.

[0150] Step E: Excavate the middle step and the lower step of the ventilation hub chamber A2, 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-shaped steel frame 214 and an inscribed circle steel beam B215 at the intersection of the ventilation hub chamber A2 and the ventilation cross-tunnel 4.

[0151] The spherical excavation method with reserved core soil is used for excavation, which can preferably reserve the rock pillar 8 directly below the exhaust shaft 3 as a temporary support structure, thereby effectively reducing the risk of arch collapse during the excavation of large-sized chambers.

[0152] The method for constructing the exhaust shaft 3 in the fifth step includes the following steps:

[0153] Step a: Excavate a foundation pit at the top of the mountain body 100 that covers the distribution range of the decentralized exhaust structure 32.

[0154] Step b: Use the raise boring method to excavate the centralized air duct section 31 at the bottom of the foundation pit until the centralized air duct section 31 is connected to the ventilation hub chamber A2. After excavation, immediately construct the initial support of the centralized air duct section 31.

[0155] Step c: Construct the concrete lining structure of the centralized air duct section 31 from bottom to top.

[0156] Step d: Construct the folded 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 folded air duct 321.

[0157] The raise boring method is adopted to construct the exhaust vertical shaft 3. The muck can directly slide down through the pre-constructed drilling channel to the ventilation hub chamber A2, which is conducive to the rapid transportation of the muck. Moreover, the groundwater gushing out during the construction of the exhaust vertical shaft 3 can also infiltrate through the drilling channel, reducing the construction risk of the exhaust vertical shaft 3. In addition, under the action of the pressure difference, the air flow can naturally flow into the exhaust vertical shaft 3 through the data tunnel 1, the ventilation hub chamber A2 and the drilling channel and be discharged upward, which is conducive to the construction ventilation during the excavation of the exhaust vertical shaft 3.

[0158] The method for constructing the internal structure of the ventilation hub chamber A2 in the eighth step includes the following steps:

[0159] Step 1: Construct the fire extinguishing gas storage bin 23 at the inner bottom of the chamber support structure 21, and install the gas supply pipeline and the buried pipeline 6.

[0160] Step 2: Construct the air guide pipe 24, and then install the axial flow fan 7 between the air guide pipe 24 and the centralized air duct section 31.

[0161] Step 3: Drill holes in the air guide pipe 24 and complete the installation of the ventilation pipe 5.

[0162] Step 4: Construct the bottom plate of the equipment storage bin 22.

[0163] Embodiment 2:

[0164] In order to ensure the power demand of the cave-type data center, any one of the intermittent data tunnels can be selected as the power tunnel, and a diesel generator or other power generation equipment can be installed therein to provide power for the electrical appliances of the entire cave-type data center in the case of a power outage of the external power grid. If a diesel generator is installed in the power tunnel, a ventilation shaft can be separately constructed to communicate with the power tunnel as the ventilation and smoke exhaust channel of 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 a damper 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).

Images