Mixing system construction method

Abstract

The application discloses a construction method of a mixing system, and comprises the following steps: designing and determining the layout of the mixing system; carrying out one-time excavation and site leveling to form a first-elevation platform and a second-elevation platform; constructing a mixing building foundation, a material storage tank foundation and a sewage treatment equipment foundation on the second-elevation platform; constructing a transfer bin foundation and an additive workshop foundation on the first-elevation platform; constructing an aggregate conveying mechanism foundation on an inclined ramp from the second-elevation platform to the first-elevation platform; manufacturing required steel structures by using a temporary steel structure manufacturing workshop arranged on the second-elevation platform; installing and fixing the steel structures and the equipment on the foundations of the respective equipment or structures; checking and accepting the respective equipment or structures, and removing the temporary steel structure manufacturing workshop. The application solves the problem of difficulty in constructing the mixing system in a narrow and limited space, guarantees stable operation of the system, and can meet the concrete construction requirements.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of construction of mixing system, and particularly relates to a construction method of mixing system. BACKGROUND

[0002] In the construction of water conservancy and hydropower projects, roller compacted concrete projects are the projects with the largest quantity, the most grades and the most complex raw materials. The quality of concrete projects directly affects the construction quality of the entire dam project. The mixing system is an essential main large-scale temporary construction facility in the construction process of hydropower stations, which is based on the project progress and the intensity of concrete construction, and aims to meet the requirements of concrete quality and the production capacity at the maximum pouring peak. Combined with the engineering geology, the mixing system is arranged in the designated site. Generally, the mixing system of the construction project of a hydropower station is arranged in a narrow site, has a large peak production capacity, a long duration, and high requirements for the temperature control quality of concrete.

[0003] The traditional construction technology of the mixing system cannot complete the construction of the mixing system in a narrow space while ensuring the stable operation of the system and meeting the requirements of concrete construction. SUMMARY

[0004] The present application aims to provide a construction method of mixing system to solve the problem that the traditional construction method cannot complete the construction of the mixing system in a narrow space while ensuring the stable operation of the system and meeting the requirements of concrete construction.

[0005] The present application solves the above technical problems by the following technical scheme: a construction method of mixing system, the method comprising the following steps:

[0006] According to the production task and the topography of the construction site, the layout of each device or structure of the mixing system is designed and determined to form a layout diagram of the mixing system.

[0007] The mixing system comprises an aggregate conveying mechanism, a transfer bin, an additive workshop, a mixing building, a refrigeration device, a material storage tank, a transportation road and a sewage treatment device. The first end of the aggregate conveying mechanism is located at a finished aggregate storage site, and the second end thereof is connected with the transfer bin. The transfer bin is located below the second end of the aggregate conveying mechanism. The additive workshop is arranged on the side of the transfer bin away from the mountain. The refrigeration device comprises a primary cooling device and a secondary cooling device. The primary cooling device is arranged on the additive workshop and is used for refrigerating the materials in the transfer bin. The mixing building is arranged on the side of the additive workshop away from the transfer bin. The secondary cooling device is arranged below the mixing building, is supported by a support platform and is used for refrigerating the materials in the mixing building. The sewage treatment device is arranged upstream of the mixing building, and the material storage tank is arranged downstream of the mixing building.

[0008] According to the mixing system layout diagram, a first elevation platform and a second elevation platform are formed by once excavation, site leveling at the construction site to be constructed;

[0009] According to the mixing system layout diagram, measurement, marking, secondary excavation and infrastructure construction are performed on the second elevation platform to form the mixing building foundation, the material storage tank foundation and the sewage treatment equipment foundation; measurement, marking, secondary excavation and infrastructure construction are performed on the first elevation platform to form the transit silo foundation and the admixture workshop foundation; measurement, marking, secondary excavation and infrastructure construction are performed on the inclined ramp along the second elevation platform to the first elevation platform to form the aggregate conveying mechanism foundation;

[0010] A temporary steel structure manufacturing workshop for manufacturing steel structures is arranged on the second elevation platform, and the required steel structures are manufactured by using the temporary steel structure manufacturing workshop;

[0011] The installation and fixation of corresponding steel structures and equipment are performed on the foundations of the equipment or structures, the installation and fixation of the cooling equipment are performed on the admixture workshop, and the installation and fixation of the cooling equipment are performed under the mixing building;

[0012] After the installation and fixation of all equipment or structures are completed, the equipment or structures are inspected and accepted, and the temporary steel structure manufacturing workshop is removed.

[0013] Further, the layout of each equipment or structure of the mixing system is designed and determined to form a mixing system layout diagram, specifically including:

[0014] A real scene terrain three-dimensional model of the construction site is constructed, and the real scene terrain three-dimensional model is exported to obtain a real scene terrain three-dimensional model file;

[0015] The mixing system is designed based on the real scene terrain three-dimensional model, a BIM model of the mixing system is constructed, and the BIM model is exported to obtain a BIM model file;

[0016] The real scene terrain three-dimensional model file and the BIM model file are imported into the InfraWorks software, and the same coordinate system is selected when the files are imported to determine the position of the BIM model in the real scene terrain three-dimensional model;

[0017] It is detected whether there is interference between the BIM model and the real scene terrain three-dimensional model or inside the BIM model;

[0018] When there is interference, the interference area is laid out; when there is no interference, the BIM model and the real terrain three-dimensional model after layout optimization are visualized, and a mixing system layout diagram is formed.

[0019] Further, the specific implementation process of detecting whether there is interference between the BIM model and the real terrain three-dimensional model and inside the BIM model is:

[0020] visually detecting whether there is interference between the BIM model and the real terrain three-dimensional model and inside the BIM model;

[0021] And / or, using Navisworks software to analyze the collision between the BIM model and the real terrain three-dimensional model, the BIM model, and the interference between each device or structure in the mixing system, the conveying line and the mountain, and the conveying lines.

[0022] Further, the aggregate conveying mechanism comprises at least one conveying line, each conveying line comprises a double-belt conveyor and a belt conveyor arranged on an inclined ramp, one end of the double-belt conveyor is located at a finished aggregate storage yard, the other end is connected to one end of the belt conveyor on the inclined ramp, and the other end of the belt conveyor on the inclined ramp is connected to the transfer bin.

[0023] Further, the belt conveyor on the inclined ramp is supported by a column, and the column is arranged on a strip foundation; the column near the double-belt conveyor adopts a portal overhead steel pipe column.

[0024] Further, the specific process of infrastructure construction comprises:

[0025] setting a reinforcing bar, binding a foundation reinforcing bar, fixing a pre-embedded part to the foundation reinforcing bar, and pouring foundation concrete in the underground space formed by secondary excavation;

[0026] checking the size of the foundation concrete and the position of the pre-embedded part;

[0027] When the check is passed, the foundation of each device or structure is obtained; when the check fails, the foundation concrete is removed by an electric grab, and then re-poured.

[0028] Further, the position of the pre-embedded part is measured by a total station for checking.

[0029] Further, the pre-embedded part and the foundation reinforcing bar are fixed by lead wire binding.

[0030] Further, a excavator is used for primary excavation or secondary excavation and slag removal, a loader is used to load the slag into a self-unloading truck, and the self-unloading truck is used to transport the slag to a slag disposal site.

[0031] Further, the steel structure is mainly made and installed as a whole.

[0032] Advantages

[0033] Compared with the prior art, the advantages of the present application are that:

[0034] The mixing system of the present application fully considers the construction site, construction conditions and other factors, and is adapted to local conditions, with staggered heights. The transit silo, admixture workshop and refrigeration equipment are spatialized and stereotized, and double-belt conveyors are arranged, which greatly reduces the land occupation area of the mixing system, is conducive to centralized operation of the system and facilitates overall management. The mixing system is constructed and built according to the layout, which solves the technical problem of difficulty in constructing the mixing system in a narrow and limited space, ensures stable operation of the system and can meet the concrete construction requirements, thereby providing a reliable guarantee for water conservancy and hydropower engineering project construction. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only one embodiment of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a flow chart of the mixing system construction method in the embodiment of the present application;

[0037] Figure 2 is a BIM model diagram of the mixing system in the embodiment of the present application;

[0038] Figure 3 is a double-layer layout diagram of the primary cooling equipment and the admixture workshop in the embodiment of the present application;

[0039] Figure 4 is a secondary cooling equipment layout schematic diagram in the embodiment of the present application;

[0040] Figure 5 is a schematic diagram of a portal type overhead steel pipe column in the embodiment of the present application.

[0041] Among them, 1-aggregate conveying mechanism, 2-transit silo, 21-belt conveyor, 22-column, 23-strip foundation, 3-admixture workshop, 4-refrigeration equipment, 41-primary cooling equipment, 42-secondary cooling equipment, 43-supporting platform, 5-mixing building, 6-material storage tank, 7-sewage treatment equipment, 8-concrete transportation road, 9-elevation 1640m platform, 10-elevation 1655m platform, 11-mountain. DETAILED DESCRIPTION

[0042] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0043] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0044] like Figure 1 As shown, a mixing system construction method provided by an embodiment of the present invention includes the following steps:

[0045] Step 1: Based on the production tasks and the topography of the construction site, design and determine the layout of each equipment or structure of the mixing system to form a mixing system layout diagram.

[0046] In this embodiment, the layout of each device or structure of the mixing system is designed and determined to form a mixing system layout diagram, which specifically includes:

[0047] Step 1.1: Build a real-scene terrain 3D model of the construction site and export the real-scene terrain 3D model to obtain a real-scene terrain 3D model file;

[0048] Step 1.2: Design the mixing system based on the real terrain 3D model, build a BIM model of the mixing system, and export the BIM model to obtain a BIM model file;

[0049] Step 1.3: Import the real-world terrain 3D model file from step 1 and the BIM model file from step 2 into InfraWorks separately. Select the same coordinate system when importing the files to determine the position of the BIM model in the real-world terrain 3D model to avoid positional deviation.

[0050] Step 1.4: Check whether there is interference between the BIM model and the real-life terrain 3D model, and within the BIM model itself.

[0051] This embodiment takes the arrangement of a mixing system of a hydropower station in a flat field on the right bank downstream of a dam as an example. The flat field on the right bank downstream of the dam is built against a mountain 11, and the site is narrow and has a complex terrain.

[0052] In step 1.1, a three-dimensional model of the real terrain of the construction site is constructed using drone oblique photography technology. The specific implementation process is as follows: using drone oblique photography to capture image data of the construction site, importing the image data into modeling software (such as smart3D), constructing a high-precision oblique model of the construction site, and generating an accurate three-dimensional model of the real terrain.

[0053] In step 1.2, after excavation within the site leveling, a platform 10 at an elevation of 1655m (i.e., the first elevation platform) and a platform 9 at an elevation of 1640m (i.e., the second elevation platform) are formed. The outside of the platform 9 at an elevation of 1640m is the access road. Figures 2 to 4 As shown, the mixing system includes an aggregate conveying mechanism 1, a transfer silo 2, an admixture workshop 3, a mixing plant 5, a refrigeration equipment 4, a material storage tank 6, a transportation road and a sewage treatment equipment 7; the aggregate conveying mechanism 1 is arranged along the horse path of the mountain 11, and the first end of the aggregate conveying mechanism 1 is located at the finished aggregate storage yard, and the second end thereof is connected to the transfer silo 2; the transfer silo 2 is arranged against the mountain 11 and is located below the second end of the aggregate conveying mechanism 1; the admixture workshop 3 is arranged on the side of the transfer silo 2 away from the mountain 11; the refrigeration The equipment 4 includes a primary cooling device 41 and a secondary cooling device 42. The primary cooling device 41 is installed on the admixture workshop 3 and is used to cool the material in the transfer silo 2; the mixing plant 5 is arranged on the side of the admixture workshop 3 away from the transfer silo 2, and a secondary cooling device 42 is provided below the mixing plant 5. The secondary cooling device 42 is supported by a support platform 43 and is used to cool the material in the mixing plant 5; a sewage treatment device 7 is provided upstream of the mixing plant 5, and a material storage tank 6 is provided downstream of the mixing plant 5.

[0054] The admixture workshop 3, transfer silo 2, material storage tank 6, and sewage treatment equipment 7 are connected to the mixing plant 5. The mixing system is connected to the finished aggregate storage yard. During concrete production, aggregate is transported to the transfer silo 2 for storage via the aggregate conveying mechanism 1. Primary cooling equipment 41 pre-cools the aggregate in the transfer silo 2. The cooled aggregate is then conveyed by a belt conveyor through an insulated corridor to the corresponding silo in the mixing plant 5 for secondary air cooling. The aggregate is fed, cooled, and discharged simultaneously. After being cooled to the designed final temperature, the aggregate is weighed and then passed through the mixing plant 5 hopper for mixing. Concrete trucks then take the concrete to the mixing plant 5 via the transport road to be transported to the site where it will be poured. After the admixture is diluted with water in the mixing tank, compressed air is transported through the air supply pipe at the bottom of the tank and mixed evenly in the vertical mixer. It then flows by gravity into the storage tank and is then pumped through the pipe by an acid-resistant pump into the admixture tank of the admixture batching device in the mixing plant 5. The cementitious material storage tank 6 is used to store powdered material, which is then transferred to the mixing plant 5 via a PLC-controlled, advanced, and reliable downdraft pump. The wastewater from the mixing plant 5 and other wastewater must be discharged to the sewage treatment plant 7 for purification.

[0055] In this embodiment, a mixing plant 5, a material storage tank 6, a sewage treatment device 7, and a secondary cooling device 42 are arranged on a platform 9 at an elevation of 1640 m; a transfer silo 2, an admixture workshop 3, and a primary cooling device 41 are arranged on a platform 10 at an elevation of 1655 m; and the aggregate conveying mechanism 1 is arranged along the inclined path from the platform 9 at an elevation of 1640 m to the platform 10 at an elevation of 1655 m.

[0056] In the design of the mixing system, the maximum concrete production strength is designed, and in this embodiment, four conveying lines are designed to meet the production construction requirements. Due to the limited construction site, it is not possible to arrange the four conveying lines in parallel, so in this embodiment, the aggregate conveying mechanism 1 includes two conveying lines, each conveying line includes a double-belt conveyor and a belt conveyor 21 arranged on the inclined ramp, one end of the double-belt conveyor is located at the finished aggregate storage yard, the other end is connected with one end of the belt conveyor 21 on the inclined ramp, and the other end of the belt conveyor 21 on the inclined ramp is connected with the transfer bin 2. The belt conveyor 21 on the inclined ramp is supported by a stand 22 arranged on a strip foundation 23; the stand 22 close to the double-belt conveyor adopts a portal overhead steel pipe stand, as shown in Figure 5 In this embodiment, the three stands 22 close to the double-belt conveyor adopt a portal overhead steel pipe stand. The double-belt conveyor 21 in the two conveying lines achieves the production strength required by the four conveying lines, and reduces the floor area occupied by the aggregate conveying mechanism 1.

[0057] The two conveying lines are arranged adjacent to each other, and the ramp is used as the admixture transportation road. In order to ensure vehicle traffic, the stand 22 (stand close to the double-belt conveyor) for supporting the belt conveyor 21 on the inclined ramp in each conveying line adopts a portal overhead steel pipe stand 22, so that the transportation vehicle can pass under the stand 22, solving the problem of the stand 22 of the belt conveyor 21 occupying the road.

[0058] The area of the elevation 1655m platform 10 of this embodiment is only about 0.1 million m 2 , and four groups of primary air cooling bins, primary cooling equipment 41, transfer bins 2, admixture workshops 3, belt conveyor control cabinets and power distribution rooms need to be arranged at the same time, and a certain site area is reserved as a hoisting platform for later equipment maintenance. The platform area is obviously insufficient. In order to fully utilize the area of the elevation 1655m platform 10, the primary cooling equipment 41 and the admixture workshop 3 are arranged in double layers, and the top plate of the admixture workshop 3 serves as the foundation platform of the primary cooling equipment 41, as shown in Figure 3 , reducing the floor area.

[0059] The area of the elevation 1640m platform 9 of this embodiment is about 1 million m 2, mainly for arranging 4 mixing buildings 5, 11 material storage tanks 6, sewage treatment equipment 7, secondary cooling equipment 42, air compression station, part of transformer and construction site warehouse, and at the same time, the space for external additive transportation road, material transportation road and concrete transportation road 8 needs to be reserved at specific positions. In this embodiment, the mixing building 5 is arranged on the side far away from the transfer bin 2 of the external additive workshop 3, and the secondary cooling equipment 42 is arranged below the mixing building 5 and supported by the support platform 43. The bottom of the support platform 43 is elevated to ensure that the bottom of the support platform 43 can be normally passed through, avoiding the traditional arrangement mode of the secondary cooling equipment 42 which occupies the concrete transportation road 8, as shown in Figure 4 The secondary cooling equipment 42 is a container type, and each mixing building 5 is equipped with a single secondary cooling equipment 42 arranged below the corresponding building. The size of a single container is 12.25m x 2.44m. If the conventional arrangement mode is adopted, the concrete receiving transportation road will be occupied.

[0060] In this embodiment, the transportation road includes the external additive transportation road, the material transportation road and the concrete transportation road 8. The external additive transportation road is formed by the space below the column 22 of each conveying line in the horse path and the aggregate conveying mechanism 1, the concrete transportation road 8 is formed by the space below the support platform 43 and the surrounding space of the sewage treatment equipment 7, and the material transportation road is formed by the surrounding space of the material storage tank 6.

[0061] When arranging each transportation road, a plurality of vehicles are used for driving simulation to determine the width and turning radius of the transportation road, and then the arrangement of the transportation road is determined.

[0062] After designing the mixing system on the construction drawing, the BIM model of the mixing system is constructed by using Revit software, and the BIM model is exported to obtain the BIM model file.

[0063] In step 1.4, whether there is interference between the BIM model and the real scene terrain three-dimensional model, and inside the BIM model can be detected by human vision. If there is, whether there is interference is further determined by different angles. If there is, the equipment or building in the interference area is fine-tuned (for example, moved) to eliminate the interference.

[0064] And / or, the BIM model, the real scene terrain three-dimensional model and the inside of the BIM model are analyzed for collision by using Navisworks software, to detect the interference between each equipment in the mixing system, between the equipment and the building, between the buildings, between the conveying lines and the mountains, and between the conveying lines. When there is interference, the equipment or building in the interference area is fine-tuned to eliminate the interference. After the interference is eliminated, the interference is detected again. When there is no interference, the BIM model and the real scene terrain three-dimensional model after layout optimization are visualized, and the mixing system layout diagram is output.

[0065] Step 2: According to the layout of the mixing system, once excavation and site leveling are performed on the site to be constructed to form a first elevation platform and a second elevation platform, the elevation of the first elevation platform is higher than the elevation of the second elevation platform.

[0066] According to the layout of the mixing system, once excavation and site leveling are performed on the site to be constructed to form a first elevation platform and a second elevation platform, the elevation of the first elevation platform is higher than the elevation of the second elevation platform.

[0067] In this embodiment, excavators are used for once excavation and slag removal, loaders are used to load the slag into dump trucks, and dump trucks are used to transport the slag to the slag disposal site.

[0068] Step 3: Foundation construction.

[0069] Before arranging the mixing building 5, material storage tank 6, sewage treatment equipment 7, and secondary cooling equipment 42 on the elevation 1640m platform 9, according to the layout of the mixing system, measurement, marking, secondary excavation, and foundation construction are performed on the elevation 1640m platform 9 to form the mixing building foundation, material storage tank foundation, and sewage treatment equipment foundation.

[0070] Before arranging the intermediate bin 2, additive workshop 3, and primary cooling equipment 41 on the elevation 1655m platform 10, according to the layout of the mixing system, measurement, marking, secondary excavation, and foundation construction are performed on the elevation 1655m platform 10 to form the intermediate bin foundation and additive workshop foundation.

[0071] Before arranging the aggregate conveying mechanism 1 along the inclined ramp from the elevation 1640m platform 9 to the elevation 1655m platform 10, according to the layout of the mixing system, measurement, marking, secondary excavation, and foundation construction are performed on the inclined ramp from the elevation 1640m platform 9 to the elevation 1655m platform 10 to form the aggregate conveying mechanism foundation.

[0072] In this embodiment, excavators are used for secondary excavation and slag removal, loaders are used to load the slag into dump trucks, and dump trucks are used to transport the slag to the slag disposal site.

[0073] In this embodiment, the specific process of foundation construction includes:

[0074] Step 3.1: Insert reinforcement in the underground space formed by secondary excavation, bind the foundation reinforcement, fix the embedded parts with the foundation reinforcement, and pour the foundation concrete.

[0075] Step 3.2: Check the size of the foundation concrete and the position of the embedded parts.

[0076] When the check passes, the mixing plant foundation, material storage tank foundation, sewage treatment equipment foundation, intermediate silo foundation, admixture workshop foundation and aggregate conveying mechanism foundation are obtained; when the check fails, the foundation concrete is removed by electric jack and then recast.

[0077] In this embodiment, the position of the embedded part is measured by a total station to perform the check. The embedded part is fixed by lead wire binding with the foundation reinforcement, and the embedded part can be a steel plate.

[0078] Step 4: A temporary steel structure manufacturing workshop for manufacturing steel structures is arranged on the second elevation platform, and the required steel structures are manufactured by using the temporary steel structure manufacturing workshop.

[0079] The temporary steel structure manufacturing workshop is arranged on the platform 9 at an elevation of 1640 m, and the columns of the belt conveyor, the truss, the steel structure of the mixing plant and the like can be manufactured, which on the one hand ensures the quality of the steel structure, reduces the transportation cost, and on the other hand speeds up the construction progress.

[0080] The required steel structures can be processed, welded, assembled, and corrosion-proofed in the temporary steel structure manufacturing workshop, and the steel structures are mainly manufactured in an integral manner, which can simplify transportation and hoisting, and can also speed up the installation of the steel structures. Most of the trusses of the belt conveyor are standard trusses, and the columns are standard columns, which simplifies the manufacturing process, ensures the manufacturing quality of the steel structure, and speeds up the manufacturing progress of the steel structure.

[0081] Step 5: The corresponding steel structures and equipment are installed and fixed on the foundations of the respective equipment or structures, the installation and fixation of the primary cooling equipment are performed in the admixture workshop, and the installation and fixation of the secondary cooling equipment are performed below the mixing plant.

[0082] After the foundation construction of the respective equipment or structures and the manufacturing of the required steel structures are completed, the installation and fixation of the equipment or structures are performed. Specifically, the required steel structures and equipment of the mixing plant are installed and fixed on the foundation of the mixing plant; the required steel structures and equipment of the material storage tank are installed and fixed on the foundation of the material storage tank; the required steel structures and equipment of the sewage treatment equipment are installed and fixed on the foundation of the sewage treatment equipment; the required steel structures and equipment of the intermediate silo are installed and fixed on the foundation of the intermediate silo; the required steel structures and equipment of the admixture workshop are installed and fixed on the foundation of the admixture workshop; and the required steel structures and equipment of the aggregate conveying mechanism are installed and fixed on the foundation of the aggregate conveying mechanism.

[0083] The installation of the steel structures is mainly integral installation.

[0084] Step 6: After the installation and fixation of all the equipment or structures are completed, the respective equipment or structures are inspected and accepted, and the temporary steel structure manufacturing workshop is removed.

[0085] After the mixing system is installed and fixed, each device is checked, debugged, and tested, and after full load operation for a period of time, comprehensive inspection and acceptance are carried out, and after the acceptance is completed, the mixing system is put into use.

[0086] The above only discloses specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or modifications within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A mixing system construction method, characterized in that: The method comprises the following steps: Design and determine the layout of each structure of the mixing system according to the production tasks and the topography of the construction site, and form a mixing system layout diagram; wherein, the structures of the mixing system include an aggregate conveying mechanism, a transfer silo, an admixture workshop, a mixing plant, a refrigeration equipment, a material storage tank, a transportation road and a sewage treatment equipment; the first end of the aggregate conveying mechanism is located at the finished aggregate storage yard, and the second end thereof is connected to the transfer silo; the transfer silo is located below the second end of the aggregate conveying mechanism; the admixture workshop is arranged on the side of the transfer silo away from the mountain; the refrigeration equipment includes a primary cooling equipment and a secondary cooling equipment, the primary cooling equipment is arranged on the admixture workshop and is used to refrigerate the material in the transfer silo; the mixing plant is arranged on the side of the admixture workshop away from the transfer silo, and a secondary cooling equipment is provided below the mixing plant, the secondary cooling equipment is supported by a support platform and is used to refrigerate the material in the mixing plant; a sewage treatment equipment is provided upstream of the mixing plant, and a material storage tank is provided downstream of the mixing plant; According to the mixing system layout diagram, excavation and leveling are performed at the site to be constructed to form a first elevation platform and a second elevation platform, wherein the elevation of the first elevation platform is greater than the elevation of the second elevation platform; According to the mixing system layout diagram, measurement, marking, secondary excavation, and foundation construction are carried out on the second elevation platform to form the foundations for the mixing plant, material storage tank, and sewage treatment equipment. Measurement, marking, secondary excavation, and foundation construction are carried out on the first elevation platform to form the foundations for the transfer silo and admixture workshop. Measurement, marking, secondary excavation, and foundation construction are carried out on the inclined road from the second elevation platform to the first elevation platform to form the foundation for the aggregate conveying mechanism. Arrange a temporary steel structure manufacturing workshop for manufacturing steel structures on the second elevation platform, and use the temporary steel structure manufacturing workshop to manufacture the required steel structures; Install and fix the corresponding steel structures and equipment on the basis of each structure of the mixing system, install and fix the primary cooling equipment on the admixture workshop, and install and fix the secondary cooling equipment under the mixing building; After completing the installation and fixation of all structures of the mixing system, the structures of the mixing system are inspected and accepted, and the temporary steel structure manufacturing workshop is dismantled.

2. The mixing system construction method according to claim 1, characterized in that: Design and determine the layout of each structure of the mixing system and form a mixing system layout diagram, including: Constructing a real-scene terrain three-dimensional model of the construction site, and exporting the real-scene terrain three-dimensional model to obtain a real-scene terrain three-dimensional model file; Designing a mixing system based on the real terrain three-dimensional model, constructing a BIM model of the mixing system, and exporting the BIM model to obtain a BIM model file; Importing the real-scene terrain 3D model file and the BIM model file into the InfraWorks software, and selecting the same coordinate system when importing the files to determine the position of the BIM model in the real-scene terrain 3D model; Detect whether there is interference between the BIM model and the real-life terrain 3D model, or within the BIM model; When interference exists, the layout of the interference area is optimized; when there is no interference, the optimized BIM model and the real-life terrain 3D model are visualized to form a mixing system layout diagram.

3. The mixing system construction method according to claim 2, characterized in that: The specific implementation process of detecting whether there is interference between the BIM model and the real terrain 3D model, or within the BIM model, is as follows: Visually inspect whether there is interference between the BIM model and the real-world 3D terrain model, and within the BIM model; And / or, use Navisworks software to perform collision analysis between the BIM model and the real-life terrain 3D model, as well as within the BIM model, to detect interference between structures in the mixing system, between the conveyor line and the mountain, and between conveyor lines.

4. The mixing system construction method according to claim 1, characterized in that: The aggregate conveying mechanism includes at least one conveying line, each of which includes a double-layer belt conveyor and a belt conveyor arranged on an inclined road. One end of the double-layer belt conveyor is located at the finished aggregate storage yard, and the other end is connected to one end of the belt conveyor on the inclined road. The other end of the belt conveyor on the inclined road is connected to the transfer silo.

5. The mixing system construction method according to claim 4, characterized in that: The belt conveyor on the inclined road is supported by columns, and the columns are arranged on a strip foundation; the columns close to the double-layer belt conveyor are door-type overhead steel pipe columns.

6. The mixing system construction method according to any one of claims 1 to 5, characterized in that: The specific process of the infrastructure construction includes: Insert reinforcement bars are placed in the underground space formed by secondary excavation, foundation reinforcement bars are tied, embedded parts are fixed to foundation reinforcement bars, and foundation concrete is poured; Check the size of foundation concrete and the position of embedded parts; If the verification is passed, the foundation of each structure of the mixing system is obtained; if the verification fails, the foundation concrete is removed with an electric pick and then re-poured.

7. The mixing system construction method according to claim 6, characterized in that: Use a total station to measure the position of embedded parts for verification.

8. The mixing system construction method according to claim 6, characterized in that: The embedded parts and the foundation steel bars are fixed by binding with lead wire.

9. The mixing system construction method according to claim 1, characterized in that: An excavator is used to perform primary or secondary excavation and remove slag, a loader is used to load the slag into a dump truck, and the dump truck is used to transport the slag to the waste dump.

10. The mixing system construction method according to claim 1, characterized in that: The steel structure is mainly manufactured and installed as a whole.

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