CN110725596A - Full cast-in-place self-ventilation double-layer roof grain storage bin structure and construction method - Google Patents

Abstract

The invention provides a full cast-in-place self-ventilation double-layer roof grain storage bin structure and a construction method, wherein the grain storage bin structure comprises a square bin body and a bin top arranged at the top of the bin body, the bin body comprises a foundation, a stand column and a wall body which are formed by cast-in-place concrete, and the bin top comprises a trapezoidal steel roof truss, an upper layer roof panel and a lower layer roof panel; the foundation, the upright posts, the wall body and the bin top are integrally formed by pouring concrete on the reinforcing mesh in situ; the steel roof truss is connected with the columns and the wall body, the foundation, the columns, the wall body and the lower roof panel form an integral sealed space, and the steel roof truss space between the upper roof panel and the lower roof panel forms a self-ventilation heat-regulation space. The invention can effectively block heat transfer, protect the low temperature in the warehouse, protect the environment and save energy, and has good airtight performance of the warehouse.

Description

A fully cast-in-place self-ventilating double-layer roof granary storage silo structure and construction method

technical field

The invention belongs to the field of granary structure and relates to a fully cast-in-place self-ventilating double-roof granary storage structure, in particular to a cast-in-situ self-ventilated double-roof granary storage structure and a construction method for storing grain.

Background technique

At present, there are various forms of grain storage silos, and the commonly used ones are:

(1) Grain storage bin with reinforced concrete arch roof. The roof of the grain storage silo is in the form of a reinforced concrete arch slab, and the arch slab is a prestressed structure that integrates the slab and frame. The lower deck is flat, the upper deck is in the shape of a secondary parabolic arch, and a closed space is formed between the upper and lower decks, resulting in poor natural ventilation. Generally, on-site prefabrication is used, which requires large-scale hoisting equipment and is difficult to hoist. In-situ cast-in-place construction at high altitude can also be used, but full scaffolding is required. The prestressed tensioning process is complex and requires professional construction units. The upper chord is arched, and it is not easy to lay plate-like thermal insulation materials. Because the roof of this warehouse type is assembled in the form of construction, there is a gap between the arch plate and the arch plate, and the gap needs to be caulked with asphalt ointment. The asphalt ointment has poor durability, and improper construction is prone to water leakage. In addition, the roof is assembled from one piece of arch board, there are many gaps, and the air tightness of the warehouse is poor.

(2) Reinforced concrete broken-line roof truss storage granary. The roof structure of the granary is in the form of a reinforced concrete prestressed concrete zigzag roof truss, and a large reinforced concrete roof panel is laid on it. There are gaps between the roof panels, and the airtightness of the warehouse is poor. Because the roof is a single layer, the thermal insulation performance is poor. The roof truss needs to be prefabricated on site, requires large hoisting equipment and is difficult to hoist. The prestressed tensioning process is complex and requires professional construction units. There is no suspended ceiling in the warehouse, and the lower string of the roof truss is easy to accumulate dust, which affects the hygiene of the warehouse.

(3) Reinforced concrete double T plate roof storage silos. The roof structure of the grain storage silo adopts the prestressed concrete double T board of the National Building Standard Atlas. There are many gaps and poor airtightness of the warehouse due to splicing between the boards.

(4) Grain storage bin with color steel sandwich panel roof. The roof structure of the grain storage silo adopts triangular or T-shaped steel roof truss, and color steel sandwich panels are laid on it. The warehouse type has poor waterproof performance, air tightness and thermal insulation performance.

(5) Grain storage bin with self-breathing ventilation double-layer plate roof. The grain storage silo adopts reinforced concrete portal rigid frame, cast-in-situ reinforced concrete roof slab on the lower layer of the rigid frame beam, erected wooden purlins on the upper layer of the rigid frame beam, and covered with wooden lookout boards and colored terracotta tiles. The warehouse type has good air tightness and heat insulation performance. The disadvantage is that terracotta has poor waterproof performance. At the same time, due to the large horizontal thrust of the rigid frame structural column under the roof load, the superimposed effect is formed with the side pressure of the grain in the warehouse, and the structural form is unreasonable, resulting in the economic span of this warehouse type not exceeding 21m. At the same time, the construction of reinforced concrete portal frame is difficult, the structure of beam-column connection nodes is complex, and the construction quality is difficult to guarantee.

It can be seen from the above that the existing warehouse-type columns for grain storage are all made of ordinary solid bricks, which have problems such as poor roof insulation performance, poor air tightness, environmental protection and energy saving, difficult construction and economical selection of warehouse-type spans.

Therefore, there is an urgent need to provide a grain storage silo with strong thermal insulation performance, good air tightness, environmental protection and energy saving, and easy construction.

SUMMARY OF THE INVENTION

In view of the above-mentioned shortcomings and deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a fully cast-in-place self-ventilating double-layer roof granary storage silo structure with strong thermal insulation performance, good air tightness, environmental protection and energy saving, and easy construction. build method.

The technical scheme adopted by the present invention for solving its technical problem is:

A fully cast-in-place self-ventilating double-roof granary storage silo structure includes a square silo body and a silo roof arranged on the top of the square silo body, the silo body includes a foundation, a column and a Walls, the uprights are formed at least at each corner of the foundation, the walls are distributed among the uprights, and the silo roof comprises a trapezoidal steel roof truss, characterized in that,

The trapezoidal steel roof truss is erected on the top of the column and the wall, and is sealed and firmly connected with the column and the wall,

The warehouse roof also includes an upper-layer roof panel and a lower-layer roof panel formed by cast-in-place concrete, wherein the upper-layer roof panel is a reinforced concrete panel formed by cast-in-place concrete on the upper chord surface of the trapezoidal steel roof truss, and the lower layer The roof slab is a reinforced concrete slab formed by cast-in-place concrete on the lower chord surface of the trapezoidal steel roof truss by means of hanging formwork construction,

The foundation, the column, the wall and the lower roof plate integrally form a sealed space for grain storage,

The steel roof truss space between the upper-layer roof panel and the lower-layer roof panel is formed as a self-ventilated heat regulation space.

Optionally, a top ventilation window is opened at the top ridge of the steel roof truss, and a side ventilation window is opened at the side eaves of the steel roof truss.

Further, the grain storage bin further includes a temperature adjustment system, the temperature adjustment system at least includes a controller, a temperature sensor and a window opening device, wherein the controller is arranged outside the wall, and the temperature sensor includes a first temperature sensor arranged in the self-ventilated heat regulation space inside the trapezoidal steel roof truss, a second temperature sensor arranged in the space between the lower roof panel and the top of the grain in the grain storage bin, and a second temperature sensor arranged in the grain an internal third temperature sensor, the window opening device is arranged on the trapezoidal steel roof truss, including a first window opening device and a second window opening device that control the opening and closing of the top ventilation window and the side ventilation skylight,

Wherein, under the condition that the external environment satisfies the ventilation condition, if the difference between the first temperature monitored by the first temperature sensor and the third temperature monitored by the third temperature sensor is greater than the first threshold or the second temperature The difference between the second temperature monitored by the temperature sensor and the third temperature is greater than a second threshold, and the controller sends an instruction to the window opening device to open the top ventilation window and the side ventilation window. Control instruction.

Optionally, a thermal insulation layer and a waterproof layer are provided on the outer sides of the column and the wall, a thermal insulation layer and a waterproof layer are arranged on the upper roof panel, and a thermal insulation layer is arranged on the lower roof panel.

Optionally, the roof panel of the upper layer is also provided with shingles and hanging shingles.

Optionally, the trapezoidal steel roof truss is an H-shaped steel roof truss.

According to another aspect of the present invention, the present invention also provides a method for constructing a fully cast-in-place self-ventilated double-layer roof granary storage silo, characterized in that the constructing method at least comprises the following steps:

SS1. Excavate the foundation groove according to the construction requirements, and lay the reinforcement mesh of the foundation, columns and walls;

SS2. Pouring concrete on the steel mesh to form the foundation, columns and walls;

SS3. Hoist the welded trapezoidal steel roof truss and connect it firmly to the column and wall;

SS4. On the upper chord surface of the trapezoidal steel roof truss, the upper roof slab is formed by means of cast-in-place concrete;

SS5. Lay flexible waterproof material on the upper roof panel, then lay steel shingles and shingles, and then dry-hang colored cement tiles on the steel shingles;

SS6. The lower roof slab is formed on the lower chord surface of the trapezoidal steel roof truss by means of hanging formwork construction.

Preferably, in the above step SS3, the sealing and firm connection between the trapezoidal steel roof truss, the column and the wall is achieved by means of bolts and sealing.

Preferably, in the above step SS4, the upper roof panel is formed according to the following steps:

(1) Bolt the steel secondary beam on the upper chord of the trapezoidal steel roof truss;

(2) Lay profiled steel plates on steel secondary beams and connect them by welding studs;

(3) Lay steel mesh and pour concrete on the profiled steel plate to form the upper roof panel.

Preferably, in the above step SS6, forming the lower roof panel may specifically include the following steps:

(1) Set steel secondary beams at the lower chord of the trapezoidal steel roof truss;

(2) Arranging reinforcement meshes on steel secondary beams, including arranging reinforcement bars on steel secondary beams to form reinforcement meshes and laying reinforcement meshes in the space between the beams. First, bind the steel bars on the steel secondary beams, and the steel bars can be bound by bending upwards and bypassing the upper end of the steel secondary beams. Plane, in order to facilitate the hoisting of the wooden formwork, so as to ensure that the bottom of the lower roof panel is flat. Next, the reinforcing mesh required for the lower roof slab is laid in the area between the beams.

(3) Concrete is poured on the reinforcement mesh of the steel secondary beam and the reinforcement mesh of the space between the beams to form the lower roof panel; wherein, the wooden formwork is hung on the lower part of the reinforcement mesh through the reinforcement, and one end of the reinforcement is connected with the template, and the other end Connect with the lower chord node of the steel roof truss and the upper roof panel.

Compared with the prior art, the fully cast-in-place self-ventilating double-layer roof granary storage silo structure and construction method of the present invention have at least the following technical effects:

(1) Solve the problem of poor roof insulation performance. Because the roof of the present invention has a double-layer roof set on a steel roof truss, the upper layer is a steel-concrete composite roof, the lower layer is a cast-in-place reinforced concrete roof, and ventilation windows are formed on the top and side of the steel structure, so that the double-layered roof is formed. There is a flowing air layer between the roofs, which will effectively block the heat transfer and protect the low temperature in the warehouse.

(2) Solve the problem of poor air tightness of the warehouse. Since the foundations, columns, walls and roofs of the present invention are all formed of cast-in-place reinforced concrete, and an integral sealed space is formed between the foundations, columns, walls and the lower roof panels of the roof, the airtight performance of the warehouse is effectively guaranteed.

(3) Solve the problem of not environmental protection and energy saving. The wall of the invention adopts reinforced concrete, the roof truss adopts steel structure, and the roof adopts steel-concrete composite roof, which avoids the use of unenvironmental and energy-saving brick masonry, wooden purlins, and wooden decking, thereby achieving the effect of environmental protection and energy saving.

(4) Solve the problem of difficult construction. The roof truss of the present invention adopts welded steel roof trusses, is manufactured in a steel structure factory, and is spliced and hoisted on site. The upper roof adopts steel-concrete composite floor, and the lower roof adopts hanging formwork construction, which is not difficult to construct.

Description of drawings

Fig. 1 is the structural representation of the fully cast-in-place self-ventilated double-layer roof grain storage silo provided by the embodiment of the present invention;

Fig. 2 is the partial enlarged structural schematic diagram of the top ridge of the steel roof truss in the present invention;

Fig. 3 is the partial enlarged schematic diagram of the side eaves of the steel roof truss of the present invention;

4 is a schematic diagram of a warehouse roof self-ventilation provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a temperature control process according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1-3, the fully cast-in-place self-ventilating double-roof granary storage silo of the present invention includes a square silo body 10 and a silo roof 20 arranged on the top of the square silo body 10. The silo body 10 includes The foundation 11, the column 12, and the wall 13 formed by pouring concrete; the warehouse roof 20 includes a trapezoidal steel roof truss 21 and a double-layered roof panel. The upper roof panel 22 and the lower roof panel 23, the upper roof panel 22 is a reinforced concrete panel formed by pouring concrete on the upper chord surface of the trapezoidal steel roof truss 21, and the lower roof panel 23 is formed by hanging formwork on the steel roof truss 21. The reinforced concrete slab formed by the cast-in-place concrete on the lower chord surface, the foundation 11, the column 12, the wall 13 and the lower roof panel 23 form an integrally sealed space, and the steel roof truss space between the upper roof panel 22 and the lower roof panel 23 is formed as a self-contained space. Ventilated thermally regulated spaces.

In an example of the present invention, the trapezoidal steel roof truss 21 may adopt an H-shaped trapezoidal steel roof truss. The top ridge of the trapezoidal steel roof truss 21 is provided with a top ventilation window 24 , and the side eaves of the trapezoidal steel roof truss 21 are provided with side ventilation windows 25 . The top ventilation window 24 may be provided on the skylight bracket bolted to the ridge of the steel roof truss, and the top ventilation window 24 may be a plurality of windows formed along the longitudinal direction of the silo body. At the vertical surface of the trapezoidal steel roof truss 21, that is, the eaves, a side ventilation window 25 can be provided in the longitudinal direction of the silo body, and the side ventilation window 25 can be a plurality of windows arranged in the longitudinal direction. In one example, The side vents 25 may be shutters. In this way, after the air temperature between the double-layered roofs rises in summer, using the natural principle of hot air rising, the air between the double-layered roofs will enter from the eaves shutters and be discharged from the roof ridge skylights, thereby forming a natural flow of air circulation effect, which can Lower the temperature in the warehouse in summer. The schematic diagram of self-ventilation is shown in Figure 4.

Further, the grain storage silo in the embodiment of the present invention is also provided with a temperature adjustment system. As shown in FIG. 5 , the temperature adjustment system is used to adjust the temperature of the grain storage silo, so that the internal temperature and surface temperature of the grain in the silo are generally consistent, which may include: Controller, temperature sensor and window opening device, the controller is arranged on the outside of the column, and the temperature sensor is arranged in the inner space of the steel roof truss, that is, the space formed by the top ventilation window, the upper roof panel, the side ventilation window and the lower roof panel The first temperature sensor, the second temperature sensor arranged between the lower roof panel and the grain, and the third temperature sensor arranged inside the grain, the window opening device is arranged on the steel roof truss, including controlling the opening of the ventilation window and controlling the opening of the ventilation skylight The first window opening device and the second window opening device, wherein, under the condition that the external environment satisfies the ventilation condition, if the difference between the first temperature monitored by the first temperature sensor and the third temperature monitored by the third temperature sensor If it is greater than the first threshold or the difference between the second temperature and the third temperature monitored by the second temperature sensor is greater than the second threshold, the controller sends a control command to the window opening device instructing to open the top ventilation windows and the side ventilation windows.

The controller of the temperature adjustment system is set outside the wall, which can be a single-chip microcomputer or a PLC. It exchanges information with the host computer through wired or wireless network connection, and controls the operation of the temperature sensor and the window opening device based on the instructions sent by the host computer. The space formed by the top ventilation window, the upper roof panel, the side ventilation window and the lower roof panel, the space between the lower roof panel 23 and the grain surface, the grain interior (hereinafter referred to as the first monitoring space, the second monitoring space and the first monitoring space respectively). Three monitoring spaces) can set up multiple temperature sensors as needed, these temperature sensors will monitor the temperature of the corresponding monitoring area in real time, and send the monitored temperature information to the controller. Window openers can be set on steel roof trusses, and each window can be opened and closed with one window opener. The window opening device can use the existing opening device, for example, it can include a motor and a telescopic rod. One end of the telescopic rod is pivotally connected to the lower end of the window sash, and the other end is connected to the output shaft of the motor. Under the driving action of the motor, it will drive the The telescopic rod moves, which in turn drives the opening and closing of the window sash. In order to avoid redundant description, the present invention omits the detailed description of the window opening device. To ensure precise control, the ID of each monitored space, the ID of the temperature sensor and the ID of each window opening device are pre-stored in the controller, and these IDs are stored in the form of an association table.

Specifically, the controller processes the received temperature information of the three spaces. First, the temperature monitored by the temperature sensor in each space is averaged to obtain the temperature of each monitored space, and the result is sent to the host computer. Then the host computer performs a difference processing between the temperature of the first monitoring space and the second monitoring space and the temperature of the third monitoring space, respectively, to obtain the corresponding temperature difference value, and compares the temperature difference value with the temperature threshold value, and the comparison results represent The difference between the first temperature monitored by the first temperature sensor and the third temperature monitored by the third temperature sensor is greater than the first threshold or the difference between the second temperature monitored by the second temperature sensor and the third temperature is greater than the second When the threshold is reached, the host computer judges whether the external environment of the grain storage bin is suitable for ventilation according to the meteorological data. For example, when the temperature is suitable for wind and there is no rain or snow, it will send a control command to the controller to open the window for ventilation. The controller receives the control command. After that, it will send a control command to the window opening device to instruct to open the ventilation skylight and the ventilation window, and then open the window for ventilation, so that the temperature of the first monitoring space and the second monitoring space is basically close to that of the third monitoring space, for example, slightly higher than the temperature of the third monitoring space. Monitoring space 1 ~ 3 ℃ and so on. The first threshold and the second threshold can be set according to actual needs, which are not particularly limited in the present invention. The above temperature control program logic is shown in Figure 5.

Further, a thermal insulation layer and a waterproof layer are arranged on the outer sides of the column 12 and the wall body 13 , an thermal insulation layer and a waterproof layer are arranged on the upper roof panel 22 , and a thermal insulation layer is arranged on the lower roof panel 23 . The thermal insulation layer and the waterproof layer can be set by bonding, which can ensure the thermal insulation effect and waterproof effect of the warehouse body. The thickness of the thermal insulation layer can be determined according to the climate conditions of different regions, and the present invention is not particularly limited, as long as the thermal insulation effect can be achieved in the local climate.

In addition, the roof panel 22 of the upper layer is also provided with shingles, hanging shingles and decorative tiles. The waterproof layer is arranged on the shingle strips, hanging shingles and decorative tiles. In the specific implementation, flexible waterproof material is first laid on the upper roof panel 22, then steel shingling strips and hanging shingles are laid, and then the steel shingling strips are laid. Dry hanging colorful decorative tiles to achieve the effect of waterproof and drainage. In addition, the lower roof panel 23 is not in direct contact with the grain stored inside the bin body, and a certain space is formed between the lower roof panel 23 and the surface of the grain.

In addition, in order to facilitate the storage of grain into the bin body, a grain storage door is provided on the longitudinal wall of the bin body. Grain storage doors can be set on the longitudinal walls on both sides, and the number of doors can be set according to the size of the warehouse body. If the longitudinal walls are very long, multiple doors can be set on the longitudinal walls on both sides.

The forming process of the silo body of the fully cast-in-place self-ventilated double-layer roof grain storage silo according to the embodiment of the present invention may include:

Step 1. Excavate foundation trenches according to construction requirements, and lay reinforcement meshes for foundations, columns and walls;

Step 2: Pouring concrete on the steel mesh to form foundations, columns and walls.

Step 3, hoist the welded steel roof truss and connect it to the column and the wall firmly, for example, the sealed and firm connection between the steel roof truss and the column and the wall can be realized by means of bolts and sealing.

Step 4: Form the upper roof panel on the upper chord surface of the steel roof truss, which may specifically include the following steps:

(1) Bolt the steel secondary beam on the upper chord of the steel roof truss;

(2) Lay profiled steel plates on steel secondary beams and connect them by welding studs;

(3) Lay steel mesh and pour concrete on the profiled steel plate to form the upper roof panel.

Step 5: Lay flexible waterproof material on the upper roof panel, then lay steel shingles and hanging shingles, and then dry-hang colored cement tiles on the steel hanging shingles.

Step 6: Form the lower roof panel on the lower chord surface of the steel roof truss by means of hanging formwork construction, which may specifically include the following steps:

(1) Set steel secondary beams at the bottom chord of the steel roof truss;

(2) Arranging reinforcement meshes on steel secondary beams, including arranging reinforcement bars on steel secondary beams to form reinforcement meshes and laying reinforcement meshes in the space between the beams. First, bind the steel bars on the steel secondary beams, and the steel bars can be bound by bending upwards and bypassing the upper end of the steel secondary beams. Plane, in order to facilitate the hoisting of the wooden formwork, so as to ensure that the bottom of the lower roof panel is flat. Next, the reinforcing mesh required for the lower roof slab is laid in the area between the beams.

(3) Concrete is poured on the reinforcement mesh of the steel secondary beam and the reinforcement mesh of the space between the beams to form the lower roof panel; wherein, the wooden formwork is hung on the lower part of the reinforcement mesh through the reinforcement, and one end of the reinforcement is connected with the template, and the other end Connect with the lower chord node of the steel roof truss and the upper roof panel.

In the specific implementation, the thickness and reinforcement of the reinforced concrete slab wall can be calculated according to the grain load height according to the grain pressure measurement, and the wind load and seismic load can be considered at the same time. In one example, the thickness of the reinforced concrete slab wall may be 180 mm, that is, the thickness of the wall body and the lower roof panel may be 180 mm, which can greatly reduce the thickness of the wall body compared to the existing brick wall.

To sum up, the fully cast-in-place self-ventilating double-layered roof granary storage silo provided by the embodiment of the present invention has a double-layered roof arranged on a steel roof truss, the upper layer is a cast-in-place steel-concrete composite roof, and the lower layer is a cast-in-place reinforced concrete roof. On the roof, ventilation windows are formed on the top and side of the steel structure, so that there is a flowing air layer between the double-layered roofs, which will effectively block heat transfer and protect the low temperature in the warehouse. In addition, the foundation, columns and walls of the present invention are made of reinforced concrete, the roof truss is made of steel structure, and the roof is made of steel-concrete composite roof, which avoids the use of unenvironmental and energy-saving brick masonry, wooden purlins, and wooden panels, and can achieve Environmental protection and energy saving effect, and ensure the airtight performance of the warehouse. In addition, the roof truss of the present invention adopts welded steel roof trusses, which are manufactured in a steel structure factory, and spliced and hoisted on site.

The above embodiments are only specific implementations of the present invention, and are used to illustrate the technical solutions of the present invention, but not to limit them. Note, those of ordinary skill in the art should understand that: any person skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments or easily think of changes within the technical scope disclosed by the present invention, or Some of the technical features are equivalently replaced; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A full cast-in-place self-ventilation double-layer roof grain storage bin structure comprises a square bin body and a bin top arranged at the top of the square bin body, wherein the bin body comprises a foundation, stand columns and wall bodies, the foundation, the stand columns and the wall bodies are formed by casting concrete on a reinforcing mesh in situ, the stand columns are at least distributed at each corner of the foundation, the wall bodies are distributed and formed among the stand columns, the bin top comprises a trapezoidal steel roof truss, and the full cast-in-place self-ventilation double-layer roof grain storage bin structure is characterized in that,

the trapezoidal steel roof truss is erected on the tops of the upright posts and the wall body and is firmly connected with the upright posts and the wall body in a sealing way,

the top of the silo also comprises an upper roof panel and a lower roof panel which are formed by cast-in-place concrete, wherein the upper roof panel is a reinforced concrete slab formed by cast-in-place concrete on the upper chord surface of the trapezoidal steel roof truss, the lower roof panel is a reinforced concrete slab formed by cast-in-place concrete on the lower chord surface of the trapezoidal steel roof truss in a mode of suspended formwork construction,

the foundation, the upright posts, the wall body and the lower roof panel form a sealed space for storing grains,

and a steel roof truss space between the upper layer roof board and the lower layer roof board forms a self-ventilation heat regulation space.

2. The structure of the double-deck roof grain storage bin with full cast-in-place and self ventilation as claimed in claim 1, wherein a top ventilation window is opened at the top ridge of the steel roof truss, and a side ventilation window is opened at the side eaves of the steel roof truss.

3. The full cast-in-place self-ventilation double-deck roof grain storage bin structure of claim 2,

the granary also comprises a temperature adjusting system, the temperature adjusting system comprises a controller, a temperature sensor and a window opening device, wherein the controller is arranged on the outer side of the wall body, the temperature sensor comprises a first temperature sensor arranged in a self-ventilation heat adjusting space in the trapezoidal steel roof truss, a second temperature sensor arranged between the lower layer roof panel and grains in the granary and a third temperature sensor arranged in the grains, the window opening device is arranged on the trapezoidal steel roof truss and comprises a first window opening device and a second window opening device which are used for controlling the opening and closing of the top ventilation window and the side ventilation skylight,

wherein, if a difference between a first temperature monitored by the first temperature sensor and a third temperature monitored by the third temperature sensor is greater than a first threshold or a difference between a second temperature monitored by the second temperature sensor and the third temperature is greater than a second threshold, the controller transmits a control command instructing to open the top louver and the side louver to the window opening device, under the condition that an external environment satisfies a ventilation condition.

4. The structure of the full cast-in-place self-ventilation double-deck roof grain storage bin according to claim 1, wherein the outer sides of the columns and the walls are provided with an insulating layer and a waterproof layer, the upper-deck roof panel is provided with an insulating layer and a waterproof layer, and the lower-deck roof panel is provided with an insulating layer.

5. The full cast-in-place self-ventilation double-deck roof grain storage bin structure according to claim 1, wherein the upper deck roof panels are further provided with down-facing battens and hanging battens.

6. The structure of a full cast-in-place self-ventilation double-deck roof grain storage bin according to claim 1, wherein the trapezoidal steel roof truss is an H-shaped steel roof truss.

7. A construction method of a full cast-in-place self-ventilation double-layer roof grain storage bin is characterized by at least comprising the following steps:

SS1, excavating a foundation trench according to construction requirements, and laying a reinforcing mesh of a foundation, a stand column and a wall body;

SS2, pouring concrete on the steel bar net to form a foundation, a stand column and a wall body;

SS3, hoisting and tightly and firmly connecting the welded trapezoidal steel roof truss to the upright post and the wall body;

SS4, forming an upper layer roof panel on the upper chord surface of the trapezoidal steel roof truss in a concrete cast-in-place mode;

SS5, paving flexible waterproof materials on the upper layer roof board, paving steel tile battens and tile hanging battens, and then hanging the colored cement tiles on the steel tile hanging battens in a dry mode;

and SS6, forming a lower layer roof panel on the lower chord surface of the trapezoidal steel roof truss in a mode of suspended formwork construction.

8. The method for constructing a full cast-in-place self-ventilation double-deck roof grain storage bin as claimed in the preceding claim, wherein in the step SS3, the trapezoidal steel roof truss is tightly connected with the upright posts and the wall body in a bolt-sealing manner.

9. The method for constructing a full cast-in-place self-ventilation double-deck roof grain storage bin as claimed in the preceding claim, wherein in the step SS4, the upper roof panel is formed according to the following steps:

(1) connecting a steel secondary beam on the upper chord of the trapezoidal steel roof truss by bolts;

(2) laying a profiling steel plate on the steel secondary beam, and connecting the profiling steel plate with the steel secondary beam through welding studs;

(3) and laying a reinforcing mesh and pouring concrete on the profiled steel sheet to form the upper roof panel.

10. The method for constructing a full cast-in-place self-ventilation double-deck roof grain storage bin as claimed in the preceding claim, wherein in the step SS6, the step of forming the lower deck roof panel specifically comprises the steps of:

(1) arranging a steel secondary beam on the lower chord of the trapezoidal steel roof truss;

(2) and arranging the reinforcing mesh on the steel secondary beam, wherein the reinforcing mesh is formed by arranging reinforcing steel bars on the steel secondary beam and paving the reinforcing mesh in the space between the beams. At first ligature reinforcing bar on the steel secondary beam, the reinforcing bar can upwards buckle and walk around the mode of steel secondary beam upper end and carry out the ligature, like this, through the mode of upwards buckling with the reinforcing bar ligature on the steel secondary beam, can ensure that the lower extreme of steel secondary beam is the plane to conveniently hang and establish wooden template, thereby guarantee that the bottom of lower floor's roof boarding is the plane. Next, the reinforcing mesh required for the lower roof plate is laid in the area between the girders.

(3) Pouring concrete on the steel bar mesh of the steel secondary beam and the steel bar mesh of the space between the beams to form a lower layer roof panel; the wooden template is hung on the lower part of the reinforcing mesh through reinforcing steel bars, one end of each reinforcing steel bar is connected with the template, and the other end of each reinforcing steel bar is connected with the lower chord node and the upper roof panel of the steel roof truss.

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