Grain storage cavern in mountain and construction method of grain storage cavern

Abstract

The invention relates to a granary in a mountain and a construction method thereof. The grain storage holes are divided into grain storage areas, grain inlet areas and pipeline equipment areas by baffles and top plates, a plurality of grain storage bins are arranged in the grain storage areas at intervals in the axis direction, any adjacent grain storage bins are separated through partition walls, conical parts are arranged at the lower ends of the grain storage bins, grain outlets are formed in the tip ends of the conical parts, and grain inlets corresponding to the grain storage bins are formed in the top plates. A grain discharging opening of the grain feeding vehicle is matched with the grain feeding opening in position, and a first electric control valve is arranged at the grain discharging opening; the grain outlet hole is located in the mountain and located below the midpoint of the connecting line of the two grain storage holes, the axis of the grain outlet hole is parallel to the axes of the grain storage holes, a grain outlet plate which is horizontally arranged and extends in the axis direction of the grain outlet hole is arranged on the lower portion of the grain outlet hole, and a grain outlet vehicle is arranged on the grain outlet plate; the articulated chutes correspond to the grain outlets one by one and are obliquely arranged in the mountain, one ends of the articulated chutes are communicated with the corresponding grain outlets, the other ends of the articulated chutes are communicated into the grain outlet holes through grain outlet pipes, and second electric control valves are arranged on the grain outlet pipes.

Description

Technical Field

[0001] This invention relates to a grain storage cavern inside a mountain and its construction method. Background Technology

[0002] Food security is the bottom line of national security, and mountain cave warehouses are the "life-saving warehouses" for strategic grain reserves. Their ability to resist risks is irreplaceable by other types of warehouses. They have advantages such as being able to withstand extreme natural disasters, being concealed and having strong shock resistance, having good temperature control, having a long storage period, being energy-saving and environmentally friendly, having low operating costs, and saving land resources.

[0003] Traditionally, most grain storage silos within mountains are converted from natural caves or abandoned mine shafts. Grain is moved in and out manually or using semi-mechanized equipment, resulting in poor working conditions. Manual processing often involves drilling and blasting, a time-consuming and labor-intensive process that leaves the silo walls uneven. The semi-manual grain handling is also inconvenient, and waterproofing and moisture-proofing are poor, with waterproofing construction being time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to provide a mountain-based grain storage cave and its construction method, in order to solve the technical problem that the traditional artificial mountain cave storage has a very inconvenient way of loading and unloading grain.

[0005] The technical solution of the in-mountain grain storage cavern of the present invention is as follows: The in-mountain grain storage cavern includes: There are two grain storage tunnels arranged parallel to each other, located on the same horizontal plane within the mountain, with both ends penetrating the mountain. A horizontally arranged roof slab is installed above each tunnel, with two baffles between the roof slab and the tunnel's top wall. These baffles and the roof slab extend along the tunnel's axis and are sealed to the tunnel, dividing it into a grain storage area, a grain inlet area, and a pipeline / equipment area. Multiple grain silos are spaced along the axis within the grain storage area, separated by partition walls. The upper end of each partition wall connects to the roof slab. Each grain silo has a conical section at its lower end, with a grain outlet at the tip. Grain inlets are located on the roof slab corresponding to the center of each grain silo. A track runs along the length of the grain inlet area, on which grain inlets are mounted. The lower end of each grain inlet is aligned with the grain inlet position, and a first electrically controlled valve is located at the lower end. Each grain inlet is equipped with a detection module to lock the grain inlet when the lower end aligns with the grain inlet. The grain outlet is located inside the mountain and below the midpoint of the line connecting the two grain storage tunnels. The axis of the grain outlet is parallel to the axis of the grain storage tunnel. The lower part of the grain outlet is equipped with a horizontally set grain outlet plate that extends along the axis of the grain outlet, and the grain outlet plate has a grain outlet cart. The chute is installed at an angle inside the mountain, corresponding one-to-one with the grain outlet. One end is connected to the corresponding grain outlet, and the other end is connected to the grain outlet through the grain outlet pipe. The grain outlet pipe is equipped with a second electric control valve. The upper opening of the grain dispensing car is matched with the lower outlet of the grain dispensing pipe.

[0006] Based on the above scheme, further improvements are made as follows: Ventilation ducts are installed in the pipeline equipment area. These ducts pass through the roof slab and connect to the grain storage silos via branch pipes that correspond one-to-one with each silo. Both ends of the ventilation ducts are connected to the air outside the mountain, and at least one end of the ventilation duct is equipped with a fan. By installing the fan, forced ventilation can be provided when natural wind is insufficient to meet ventilation requirements.

[0007] Based on the above plan, the following improvements are made: the two ends of the grain storage area are backfilled with concrete to ensure that the distance between the grain storage area and the outside of the mountain is not less than 5 meters.

[0008] Based on the above scheme, the following improvements are made: a waterproof air membrane is installed on the inner wall of the grain storage cave, which is processed by an air-forming method.

[0009] Based on the above scheme, the following improvements were made: a steel mesh layer was installed inside the waterproof air membrane, and concrete was sprayed onto the steel mesh layer to form the hole wall.

[0010] The construction method of the mountain-based grain storage cavern of the present invention includes the following steps: S10. Two initial tunnels for grain storage and one for grain discharge are excavated at designated locations on the mountain using a tunnel boring machine. The two ends of the initial tunnels penetrate the mountain and are simultaneously supported by precast concrete segments to form a cylindrical structure. A supporting cylinder is then constructed inside the precast concrete segments using a steel cage and cast-in-place concrete. S20. Cut the support cylinder and precast concrete segments at the position corresponding to the grain storage silo at the bottom of the grain storage tunnel. Then excavate the conical structure at intervals. Then support the reinforced concrete structure. Process inclined holes from the lower tip of the conical part towards the grain outlet tunnel and install the chute. Install the grain outlet pipe at the lower end of the chute. Set the second electric control valve at the lower end of the grain outlet pipe. Pour partition walls between adjacent conical parts. S30. After laying a subbase at the bottom of the grain outlet, lay the grain outlet slab, which is an asphalt concrete slab. S40. Pour a top slab and baffle on the upper part of the grain storage tunnel. The top slab and baffle divide the grain storage tunnel into a grain storage area, a grain inlet area, and a pipeline equipment area. Connect the top slab with the partition wall. Reserve grain inlets in the areas corresponding to each grain storage silo on the top slab to form the structure of the grain storage silo. Install rails symmetrically on the top slab along the lines connecting each grain inlet. Install grain feeding cars on the rails. Install a first electric control valve on the grain feeding car's lowering port. Install a detection module at each grain feeding port to detect the position of the grain feeding car so that the grain feeding car is locked when the lowering port is aligned with the grain feeding port.

[0011] Based on the above scheme, further improvements are made as follows: In S10, a groove is pre-set on the precast concrete segments and support cylinder at the junction of the conical part of the grain storage silo and the grain storage hole to form a weak part, and the reinforcing bars in the precast concrete segments and support cylinder cannot penetrate the groove.

[0012] Based on the above scheme, further improvements are made as follows: when pouring the top slab in S40, a ventilation opening is reserved for each grain storage silo; after the top slab construction is completed, ventilation pipes are laid along the length of the pipeline and equipment area, and branch pipes are set on the ventilation pipes corresponding to the ventilation openings of each grain storage silo. The branch pipes pass through the ventilation openings and enter the grain storage silos, so that both ends of the ventilation pipes are connected to the air outside the mountain, and a fan is installed at at least one end of the ventilation pipes.

[0013] Based on the above scheme, further improvements are made as follows: after the initial excavation and support of the grain storage silo are completed, the shape of the grain storage silo is formed by inflating a waterproof air membrane and covering the inner wall of the grain storage silo. Then, a steel mesh layer is installed inside the waterproof air membrane, and concrete is sprayed onto the steel mesh to form the silo wall.

[0014] The beneficial effects of this application are as follows: Compared with existing technologies, this application arranges grain storage silos along the depth of the mountain within grain storage tunnels, and sets up a grain outlet tunnel below and between two adjacent grain storage tunnels for centralized grain discharge. Grain loading and unloading operations are then automatically completed by grain loading and unloading vehicles. The process requires virtually no on-site personnel, achieving a high degree of automation, which is extremely convenient, fast, and efficient. Furthermore, the method of two grain storage tunnels sharing the same grain outlet tunnel not only facilitates grain discharge but also significantly reduces construction costs, equipment costs, and subsequent maintenance and management costs. The way the grain storage tunnels penetrate the mountain at both ends facilitates natural ventilation of the pipeline and equipment areas. The structure of the grain storage silos not only has high space utilization and is easy to construct but also facilitates grain loading and unloading. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of a specific embodiment of the grain storage cavern within a mountain according to the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 A horizontal sectional view of a single grain storage silo before the conical section is processed; Figure 4 A horizontal sectional view of the grain storage silo after the conical section has been machined. Figure 5 A schematic diagram of the cross-sectional structure of a grain storage cave within a mountain; Figure 6 for Figure 5 A magnified view of a section at point B in the middle; Figure 7 for Figure 5 A magnified view of a section at point C; In the diagram: 1-mountain, 2-grain storage tunnel, 201-precast concrete segment, 202-support cylinder, 203-trench, 21-top slab, 211-grain inlet, 212-track, 22-baffle, 24-partition wall, 25-grain silo, 251-conical section, 2511-grain outlet, 26-grain car, 261-grain discharge outlet, 262-first electric control valve, 27-grain storage area, 271-concrete backfill, 28-grain inlet area, 29-pipeline and equipment area, 291-ventilation pipe, 292-branch pipe, 3-grain outlet tunnel, 31-grain outlet plate, 32-grain car, 33-drainage pipe, 34-exhaust pipe, 4-chute, 41-grain outlet pipe, 42-second electric control valve. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0019] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0020] Specific embodiments of the grain storage caverns inside mountains of the present invention: as follows Figure 1-7As shown, the grain storage cavern inside the mountain includes grain storage cave 2, grain outlet cave 3, chute 4, grain inlet car 26, grain outlet car 32, ventilation pipe 291, drainage pipe 33, etc.

[0021] Among them, such as Figure 1 , 5 As shown, there are two grain storage tunnels 2 arranged parallel to each other, located on the same horizontal plane within the mountain 1. Both ends of the grain storage tunnels 2 penetrate the mountain 1. A horizontally arranged roof slab 21 is provided above the grain storage tunnels 2. Two baffles 22 are installed between the roof slab 21 and the top wall of the grain storage tunnel 2. The baffles 22 and the roof slab 21 extend along the axial direction of the grain storage tunnel 2 and are respectively sealed to the grain storage tunnel 2, dividing the grain storage tunnel 2 into a grain storage area 27, a grain intake area 28, and a pipeline equipment area 29. Multiple grain storage silos 25 are spaced apart along the axial direction within the grain storage area 27 (only some grain storage silos 25 are shown in the figure). Any adjacent grain storage silos 25 are separated by a partition wall 24. The upper end of the partition wall 24 is connected to the roof slab 21, and the lower end of the grain storage silo 25 has a conical shape. The cone-shaped part 251 is in the shape of an inverted pyramid, or square pyramid. The tip of the cone-shaped part 251 has a grain outlet 2511. The top plate 21 is provided with a grain inlet 211 corresponding to the center of each grain storage bin 25. The grain inlet area 28 is provided with a track 212 along the length direction. The grain inlet cart 26 is rolled on the track 212. The position of the grain outlet 261 of the grain inlet cart 26 is adapted to the position of the grain inlet 211. A first electric control valve 262, such as an electromagnetic shut-off valve, is provided at the grain outlet 261. Each grain inlet 211 is provided with a detection module for detecting the position of the grain inlet cart 26. Various sensors, such as Hall sensors or far-infrared sensors, are used to lock the grain inlet cart 26 when the grain outlet 261 is aligned with the grain inlet 211. For example, the entire storage tunnel has a unified controller, which is wirelessly linked to the vehicle controller of the grain loading vehicle 26. A permanent magnet is installed at the grain inlet 211, and a Hall sensor is installed at the bottom of the grain loading vehicle 26. When the grain inlet 261 is aligned coaxially with the grain inlet, the Hall sensor detects the magnetic field of the corresponding permanent magnet and sends feedback to the unified controller. The unified controller then stops the grain loading vehicle 26 and opens the first electronically controlled valve 262, allowing the grain to be unloaded into the corresponding grain storage silo 25. The grain storage tunnel 2 is a cylindrical structure with a diameter of 15m, drilled by a tunnel boring machine. The tapered section 251 has a taper of 45°, and the chute 4 has an inclination of 45°.

[0022] The grain outlet tunnel 3 is located inside the mountain 1 and below the midpoint of the line connecting the two grain storage tunnels 2. The axis of the grain outlet tunnel 3 is parallel to the axis of the grain storage tunnel 2. The lower part of the grain outlet tunnel 3 is equipped with a horizontally arranged grain outlet plate 31 extending along the axis of the grain outlet tunnel 3, and a grain outlet cart 32 is mounted on the grain outlet plate 31. The grain outlet tunnel 3 is a cylindrical structure with a diameter of 12m drilled by a tunnel boring machine.

[0023] The chute 4 corresponds one-to-one with the grain outlet 2511 and is inclinedly installed inside the mountain 1. One end is connected to the corresponding grain outlet 2511, and the other end is connected to the grain outlet 3 through the grain outlet pipe 41. The grain outlet pipe 41 is equipped with a second electric control valve 42.

[0024] The upper opening of the grain dispensing car 32 is matched with the lower outlet position of the grain dispensing pipe 41.

[0025] The pipeline equipment area 29 is equipped with a ventilation pipe 291. The ventilation pipe 291 passes through the roof 21 and connects to the grain storage silos 25 via branch pipes 292, which correspond one-to-one with each grain storage silo 25. Both ends of the ventilation pipe 291 are connected to the air outside the mountain 1, and at least one end of the ventilation pipe 291 is equipped with a fan. By installing the fan, it can be turned on to provide forced ventilation when natural wind is insufficient to meet the ventilation requirements.

[0026] Both ends of the grain storage area 27 are backfilled with concrete 271 to ensure that the distance between the grain storage area 27 and the outside of the mountain 1 is not less than 5 meters. The inner wall of the grain storage cave 2 is equipped with a waterproof air membrane, which is manufactured by inflating and molding. A steel mesh layer is installed inside the waterproof air membrane, and concrete is sprayed on the steel mesh layer to form the cave wall.

[0027] The construction method of the mountain-based grain storage cavern of the present invention includes the following steps: Two initial tunnels, namely a grain storage tunnel 2 and a grain outlet tunnel 3, are excavated at designated locations on the mountain 1 using a tunnel boring machine. The two ends of the initial tunnels penetrate the mountain 1 and are simultaneously supported by precast concrete segments 201 to form a cylindrical structure. Inside the precast concrete segments 201, a support cylinder 202 is constructed using a steel cage and cast-in-place concrete. At the junction of the conical part 251 of the grain storage silo 25 and the grain storage tunnel 2, a groove 203 is pre-set on the precast concrete segments 201 and the support cylinder 202 to form a weak point, and the steel bars inside the precast concrete segments 201 and the support cylinder 202 cannot penetrate the groove 203. After the initial excavation and support of the grain storage silo 25 are completed, a waterproof air membrane is inflated to form the shape of the grain storage silo 25 and covers the inner wall of the grain storage silo 25. Then, a steel mesh layer is installed inside the waterproof air membrane, and concrete is sprayed onto the steel mesh to form the silo wall of the grain storage silo 25.

[0028] Cut the support cylinder 202 and the precast concrete segment 201 at the position corresponding to the grain storage silo 25 at the lower part of the grain storage cave 2. Then excavate the structure of the conical part 251 at intervals. Then support the reinforced concrete structure. From the lower tip of the conical part 251, make inclined holes towards the grain outlet cave 3 and install the chute 4. Install the grain outlet pipe 41 at the lower end of the chute 4. Set the second electric control valve 42 at the lower end of the grain outlet pipe 41. Pour the partition wall 24 between adjacent conical parts 251.

[0029] After laying a subbase layer at the bottom of the grain outlet 3, the grain outlet slab 31 is laid. The grain outlet slab 31 is an asphalt concrete slab.

[0030] A top slab 21 and a baffle 22 are poured on the upper part of the grain storage cave 2. The top slab 21 and the baffle 22 divide the grain storage cave 2 into a grain storage area 27, a grain inlet area 28, and a pipeline and equipment area 29. The top slab 21 is connected to the partition wall 24. Grain inlets 211 are reserved on the top slab 21 in the area corresponding to each grain storage silo 25 to form the structure of the grain storage silo 25. Tracks 212 are symmetrically installed on the top slab 21 about the line connecting each grain inlet 211. Grain feeding carts 26 are installed on the tracks 212. A first electric control valve 262 is set on the grain outlet 261 of the grain feeding cart 26. A detection module for detecting the position of the grain feeding cart 26 is set on each grain outlet 211 so that the grain feeding cart 26 is locked when the grain outlet 261 is aligned with the grain outlet 211. When pouring the top slab 21, a ventilation opening is reserved for each grain storage silo 25. After the construction of the top slab 21 is completed, a ventilation pipe 291 is laid along its length in the pipeline and equipment area 29. A branch pipe 292 is set on the ventilation pipe 291 corresponding to the ventilation opening of each grain storage silo 25. The branch pipe 292 passes through the ventilation opening and enters the grain storage silo 25, so that both ends of the ventilation pipe 291 are connected to the air outside the mountain 1. A fan is installed at at least one end of the ventilation pipe 291.

[0031] This application arranges grain storage silos 25 along the longitudinal direction of the mountain 1 within grain storage tunnels 2, and sets out a grain outlet tunnel 3 below and between two adjacent grain storage tunnels 2 for centralized grain discharge. Grain loading and unloading operations are then automatically completed by grain inlet vehicles 26 and grain outlet vehicles 32. The process requires minimal on-site personnel intervention, achieving a high degree of automation that is convenient, fast, and efficient. Furthermore, the sharing of the same grain outlet tunnel 3 between two grain storage tunnels 2 not only facilitates grain discharge but also significantly reduces construction, equipment, and subsequent maintenance costs. The fact that the grain storage tunnels 2 penetrate the mountain 1 at both ends facilitates natural ventilation of the pipeline equipment area 29. The structure of the grain storage silos 25 not only maximizes space utilization and facilitates construction but also ensures convenient grain loading and unloading.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A mountain-dwelling grain storage cave, characterized in that, include: There are two grain storage tunnels arranged parallel to each other, located on the same horizontal plane within the mountain, with both ends penetrating the mountain. A horizontally arranged roof slab is installed above each tunnel, with two baffles between the roof slab and the tunnel's top wall. These baffles and the roof slab extend along the tunnel's axis and are sealed to the tunnel, dividing it into a grain storage area, a grain inlet area, and a pipeline / equipment area. Multiple grain silos are spaced along the axis within the grain storage area, separated by partition walls. The upper end of each partition wall connects to the roof slab. Each grain silo has a conical section at its lower end, with a grain outlet at the tip. Grain inlets are located on the roof slab corresponding to the center of each grain silo. A track runs along the length of the grain inlet area, on which grain inlets are mounted. The lower end of each grain inlet is aligned with the grain inlet position, and a first electrically controlled valve is located at the lower end. Each grain inlet is equipped with a detection module to lock the grain inlet when the lower end aligns with the grain inlet. The grain outlet is located inside the mountain and below the midpoint of the line connecting the two grain storage tunnels. The axis of the grain outlet is parallel to the axis of the grain storage tunnel. The lower part of the grain outlet is equipped with a horizontally set grain outlet plate that extends along the axis of the grain outlet, and the grain outlet plate has a grain outlet cart. The chute is installed at an angle inside the mountain, corresponding one-to-one with the grain outlet. One end is connected to the corresponding grain outlet, and the other end is connected to the grain outlet through the grain outlet pipe. The grain outlet pipe is equipped with a second electric control valve. The upper opening of the grain dispensing car is matched with the lower outlet of the grain dispensing pipe.

2. The mountain-based grain storage cave as described in claim 1, characterized in that, The pipeline equipment area is equipped with ventilation pipes. The ventilation pipes pass through the roof slab and are connected to the grain storage silos through branch pipes that correspond to each grain storage silo. Both ends of the ventilation pipes are connected to the air outside the mountain, and at least one end of the ventilation pipe is equipped with a fan.

3. The mountain-based grain storage cave as described in claim 1, characterized in that, The two ends of the grain storage area are backfilled with concrete to ensure that the distance between the grain storage area and the outside of the mountain is no less than 5 meters.

4. The mountain-based grain storage cave as described in claim 1, characterized in that, The inner wall of the grain storage cave is equipped with a waterproof air membrane, which is manufactured by inflating and molding.

5. The mountain-based grain storage cave as described in claim 4, characterized in that, A steel mesh layer is installed inside the waterproof air membrane, and concrete is sprayed on the steel mesh layer to form the hole wall.

6. The construction method for a mountain-based grain storage cave as described in any one of claims 1-5, characterized in that, Includes the following steps: S10. Two initial tunnels for grain storage and one for grain discharge are excavated at designated locations on the mountain using a tunnel boring machine. The two ends of the initial tunnels penetrate the mountain and are simultaneously supported by precast concrete segments to form a cylindrical structure. A supporting cylinder is then constructed inside the precast concrete segments using a steel cage and cast-in-place concrete. S20. Cut the support cylinder and precast concrete segments at the position corresponding to the grain storage silo at the bottom of the grain storage tunnel. Then excavate the conical structure at intervals. Then support the reinforced concrete structure. Process inclined holes from the lower tip of the conical part towards the grain outlet tunnel and install the chute. Install the grain outlet pipe at the lower end of the chute. Set the second electric control valve at the lower end of the grain outlet pipe. Pour partition walls between adjacent conical parts. S30. After laying a subbase at the bottom of the grain outlet, lay the grain outlet slab, which is an asphalt concrete slab. S40. Pour a top slab and baffle on the upper part of the grain storage tunnel. The top slab and baffle divide the grain storage tunnel into a grain storage area, a grain inlet area, and a pipeline equipment area. Connect the top slab with the partition wall. Reserve grain inlets in the areas corresponding to each grain storage silo on the top slab to form the structure of the grain storage silo. Install rails symmetrically on the top slab along the lines connecting each grain inlet. Install grain feeding cars on the rails. Install a first electric control valve on the grain feeding car's lowering port. Install a detection module at each grain feeding port to detect the position of the grain feeding car so that the grain feeding car is locked when the lowering port is aligned with the grain feeding port.

7. The construction method according to claim 6, characterized in that, In S10, a groove is pre-set on the precast concrete segments and support cylinder at the junction of the conical part of the grain storage silo and the grain storage hole to form a weak part, and the steel bars in the precast concrete segments and support cylinder cannot penetrate the groove.

8. The construction method according to claim 6, characterized in that, When pouring the top slab in S40, a ventilation opening is reserved for each grain storage silo. After the top slab construction is completed, ventilation pipes are laid along the length of the pipeline and equipment area. Branch pipes are set on the ventilation pipes corresponding to the ventilation openings of each grain storage silo. The branch pipes pass through the ventilation openings and enter the grain storage silos, so that both ends of the ventilation pipes are connected to the air outside the mountain. A fan is installed at at least one end of the ventilation pipe.

9. The construction method according to claim 6, characterized in that, After the initial excavation and support of the grain storage silo are completed, the shape of the silo is formed by inflating a waterproof air membrane and covering the inner wall of the silo. Then, a steel mesh layer is installed inside the waterproof air membrane, and concrete is sprayed onto the steel mesh to form the silo wall.

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