A structure for underground logistics pipe trench of electronic clean workshop

Abstract

The utility model provides a structure for electronic clean factory building underground logistics pipe ditch, including the underground logistics pipe ditch (1) of concrete and logistics hoist well (2), through the underground logistics pipe ditch (1) of concrete and logistics hoist well (2) will each production monomer be connected, adopts hoist and logistics conveyer belt and will production material be delivered to different production unit, clean electronic factory building has higher requirement to cleanliness in product production and logistics transportation process, in order to satisfy the production process demand of enterprise, improve production efficiency, shorten production cycle, reduce waste and redundancy in production flow, underground logistics pipe ditch should emerge as the times require. Clean electronic factory building has very strict requirement to indoor environment. Underground logistics pipe ditch can effectively isolate external pollution source, prevent dust, particulate and other pollutants from entering the factory, thereby maintaining the stability and reliability of clean production environment.

Description

Technical Field

[0001] This utility model relates to the design of underground logistics trench transportation systems, specifically a method for underground logistics transportation in clean electronic manufacturing plants, providing an efficient and fast logistics channel for these plants. Through the trenches, goods can be transported quickly and safely to designated locations, reducing surface traffic congestion and delays, and improving logistics efficiency. Background Technology

[0002] Currently, with the acceleration of urbanization and the increasing scarcity of land resources, underground logistics trenches utilize underground space for logistics transportation, effectively saving surface land occupation. As a green and environmentally friendly logistics method, underground logistics trenches align with the concept of sustainable development. They reduce emissions and noise pollution from surface traffic, mitigating negative environmental impacts.

[0003] Furthermore, many manufacturing enterprises in my country still face difficulties due to irrational factory layouts. Disorganized factory layouts, low levels of automation, inefficient material transportation, and poor production rhythms lead to significant waste, increasing production costs and reducing enterprise competitiveness. Underground logistics trenches can greatly improve logistics efficiency, shorten production cycles, and reduce waste and redundancy in the production process. Utility Model Content

[0004] This utility model provides an effective solution to the above-mentioned problems. It provides a structure for underground logistics trenches in electronic cleanrooms. In addition, the underground logistics system can effectively isolate the underground system from the outside environment, which can meet the high cleanliness requirements of modern electronic industry for product production and transportation. Therefore, it will be widely used and rapidly popularized in the design of high-standard parks such as electronic industrial parks, and truly achieves economy, rationality and science.

[0005] This application provides a structure for an underground logistics trench in an electronic cleanroom, characterized by comprising a concrete underground logistics trench and a logistics lifting shaft.

[0006] The production units are connected by underground concrete logistics trenches and logistics lifting wells, and production materials are transported to different production units by elevators and logistics conveyor belts.

[0007] The main body of the logistics trench adopts a box-shaped waterproof reinforced concrete structure. The top of the concrete structure is covered by a cover plate or a monolithic cast-in-place structure. When a monolithic cast-in-place structure is used, cover plates should be installed in sections to facilitate the later laying or maintenance of pipelines. The specific dimensions are determined based on the space required for compact placement of pipelines within the trench. Then, the thickness of the structural side walls, top slab, and bottom slab is designed according to the dimensions and the location in the cross section. For logistics trenches located under motor vehicle lanes, the effect of vehicle loads on the trench must be considered, and a reasonable amount of steel reinforcement should be configured through calculation.

[0008] According to the present application, a structure for an underground logistics trench in an electronic cleanroom is characterized in that: the main body of the logistics trench has an upper process pipeline cavity and a lower motor vehicle lane cavity; the space between them is filled with sand and gravel; the compaction coefficient is ≥0.94 and fak is not less than 120 kPa.

[0009] According to the structure of the underground logistics trench for an electronic cleanroom described in this application, the dead load of the main body of the logistics trench is as follows:

[0010] Structural self-weight: The unit weight of reinforced concrete is 25 kN / m³.

[0011] The density of plain concrete is 23 kN / m³.

[0012] Cover weight: When calculating internal forces, the unit weight of the cover soil is 18 kN / m³; while when performing anti-buoyancy calculations, the unit weight of the cover soil is 10 kN / m³.

[0013] Lateral earth pressure: In the calculation of active earth pressure, the unit weight of the overburden above groundwater is 18 kN / m³, while that below groundwater is 10 kN / m³.

[0014] The live load values ​​are as follows:

[0015] Ground loading: Considering the transportation and stacking of equipment and machinery, the bulk density of the ground at the top of the slope is set at 20kN / m².

[0016] Vehicle load: Follow the city-A level standard. The load calculation is based on the "Code for Design of Pipeline Structure of Water Supply and Drainage Engineering" and can refer to the values ​​in the "Handbook for Structural Design of Water Supply and Drainage Engineering", where z represents the depth of the overburden.

[0017] According to the structure of an underground logistics pipeline trench for an electronic cleanroom as described in this application, the characteristic is that: the crack control of the logistics pipeline trench is level three, that is, cracks are allowed, but the crack width must be strictly controlled within 0.2 mm; this standard aims to ensure the safety and durability of the pipeline structure.

[0018] Expansion joint design for logistics pipeline trenches:

[0019] Expansion joints must be installed in logistics trenches to prevent damage from uneven settlement and to ensure waterproofing. Expansion joints are installed every 15m along Hongyun Avenue, and rubber waterstops are pre-embedded in the middle of the cross-section.

[0020] Layout of embedded parts:

[0021] Embedded parts need to be pre-embedded according to the layout of cables and pipelines in the trench. The material, size, shape, and spacing of the embedded parts need to be determined. Embedded parts are generally made of steel and are effectively connected to the steel bars in the structure to improve the strength of the embedded parts and ensure the design life of the trench.

[0022] According to the structure of the underground logistics trench for electronic cleanrooms described in this application, the logistics trench must be equipped with inspection wells, with a maximum distance not exceeding 200m, preferably 50m to 100m, and care should be taken to avoid arranging the inspection wells within the scope of planar intersections. The inspection well shaft is constructed with M10 mortar and MU10 bricks (24 wall), with windows on both sides connecting to the integrated pipeline trench. A simple steel ladder is installed inside the inspection well for convenient maintenance.

[0023] According to the structure of an underground logistics trench for an electronic cleanroom as described in this application, the characteristic is that the burial depth of the logistics trench is typically ≥1.5 meters, avoiding the frozen soil layer and areas with high groundwater levels;

[0024] Waterproofing measures: Waterproof concrete with a waterproofing grade of level II or above is used, and the concrete is self-waterproofing plus an external waterproof membrane (such as SBS modified bitumen).

[0025] At key nodes and joints, additional waterproofing layers such as waterstops or expansion plugs should be installed to enhance the waterproofing effect. At the same time, the overlap width and construction quality of the waterproof membrane must be strictly controlled to ensure no leakage points. For waterproof concrete, its impermeability grade should be reasonably selected according to the actual situation of the project to meet long-term waterproofing requirements. During the construction process, strict waterproofing tests should also be carried out to ensure the effectiveness of the waterproofing measures.

[0026] Foundation bearing layer: The foundation bearing layer of the pipe trench floor must meet the bearing capacity requirements of the pipe trench and the backfill soil, and the uneven settlement of the pipe trench caused by different bearing layers must be considered. If necessary, local foundation treatment is required.

[0027] The advantages of this utility model are as follows: This application provides an underground logistics trench transportation method for clean electronic manufacturing plants. Clean electronic manufacturing plants have high requirements for cleanliness during product manufacturing and logistics transportation. In order to meet the production process needs of enterprises, improve production efficiency, shorten production cycles, and reduce waste and redundancy in the production process, underground logistics trenches have emerged. Clean electronic manufacturing plants have extremely strict requirements for the indoor environment. Underground logistics trenches can effectively isolate external pollution sources and prevent dust, particles, and other pollutants from entering the plant, thereby maintaining the stability and reliability of the clean production environment. Attached Figure Description

[0028] Figure 1 This is a typical cross-sectional view of the underground logistics trench used in the clean electronic manufacturing plant in this application;

[0029] Figure 2 This is a schematic diagram of the lifting well at the entrance of the logistics pipeline trench in this application;

[0030] Figure 3 This is a schematic diagram of the reinforcement of the logistics trench in this application. Detailed Implementation

[0031] The following will be combined with the appendix Figures 1-3 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0032] This utility model application provides a structural method for underground logistics trenches in electronic cleanrooms, such as... Figures 1-3 As shown, this can be implemented as follows: Connect each production unit via underground concrete logistics trenches and logistics lift shafts. Use elevators and conveyor belts to transport production materials to different production units. Improve the structural design in "Cast-in-place Concrete Integrated Pipe Gallery" 17GL201 by considering the factory's lifecycle and production processes. This structural design is safe and reliable, effectively reducing the cost of the main structure and construction period. It also ensures a safe, environmentally friendly, and aesthetically pleasing factory layout. Furthermore, it improves material transportation efficiency, accelerates production, reduces the risk of product contamination during transportation, and lowers enterprise production costs.

[0033] The design of underground logistics trenches mainly includes the selection of trench sites, the structural design of trenches, the layout of pipelines within the trenches, and the design of ancillary facilities. The design needs to consider safety, economy, and maintainability.

[0034] The underground logistics pipeline trench is designed as follows:

[0035] 1. Site selection:

[0036] Geological conditions: Investigate the geological conditions and select an area with good foundation bearing capacity and a low groundwater level.

[0037] Convenient transportation: It is close to major transportation hubs, facilitating the entry, exit, and transportation of goods.

[0038] Coordinate with other pipelines: Avoid other underground pipelines to prevent cross-interference.

[0039] Environmental impact: Consider the impact on the surrounding environment, such as noise and vibration.

[0040] The location of logistics trenches should be selected based on the standard cross-section of the road, with minimal interference from other pipelines and convenient construction. Generally, they should be located under green belts or sidewalks. If these conditions are not met, they can be located under the roadway, but when laying them out, they should be appropriately close to the green belt to facilitate the installation of ventilation pipes.

[0041] 2. Structural Design: The main structure of the logistics trench generally adopts a box-shaped waterproof reinforced concrete structure. The top of the structure can be a cover plate or a monolithic cast-in-place structure. When using a monolithic cast-in-place structure, cover plates should be installed in sections to facilitate the later laying or maintenance of pipelines. The specific dimensions are determined based on the space required for compact placement of pipelines within the trench. Then, the thickness of the structural side walls, top slab, and bottom slab is designed according to the dimensions and the location in the cross-section. For logistics trenches located under motor vehicle lanes, the effect of vehicle loads on the trench must be considered, and a reasonable amount of steel reinforcement should be configured through calculation.

[0042] The values ​​for dead loads are as follows:

[0043] Structural self-weight: The unit weight of reinforced concrete is 25 kN / m³.

[0044] The density of plain concrete is 23 kN / m³.

[0045] Cover weight: When calculating internal forces, the unit weight of the cover soil is 18 kN / m³; while when performing anti-buoyancy calculations, the unit weight of the cover soil is 10 kN / m³.

[0046] Lateral earth pressure: In the calculation of active earth pressure, the unit weight of the overburden above groundwater is 18 kN / m³, while that below groundwater is 10 kN / m³.

[0047] The live load values ​​are as follows:

[0048] Ground loading: Considering the transportation and stacking of equipment and machinery, the load density of the ground at the top of the slope is set at 20kN / m².

[0049] Vehicle load: Follow the city-A level standard. The load calculation is based on the "Code for Design of Pipeline Structure of Water Supply and Drainage Engineering" and can refer to the values ​​in the "Handbook for Structural Design of Water Supply and Drainage Engineering", where z represents the depth of the overburden.

[0050] Crack Control: The "Code for Design of Building Foundations" clearly stipulates the control standards for cracks in utility tunnels. According to the code, the crack control level for utility tunnels is Level 3, meaning that cracks are allowed, but the crack width must be strictly controlled within 0.2 mm. This standard aims to ensure the safety and durability of the utility tunnel structure.

[0051] Expansion joint settings:

[0052] Expansion joints must be installed in logistics trenches to prevent damage from uneven settlement and to ensure waterproofing. Expansion joints are installed every 15 meters along Hongyun Avenue, and rubber waterstops are pre-embedded in the middle of the cross-section.

[0053] Layout of embedded parts:

[0054] Embedded parts need to be pre-embedded according to the layout of cables and pipelines in the trench. The material, size, shape, and spacing of the embedded parts need to be determined. Embedded parts are generally made of steel and are effectively connected to the steel bars in the structure to improve the strength of the embedded parts and ensure the design life of the trench.

[0055] Inspection well:

[0056] Inspection wells must be installed in logistics trenches, with a maximum distance not exceeding 200m, preferably between 50m and 100m. Care should be taken to avoid placing inspection wells within the area of ​​horizontal intersections. The inspection well shaft should be constructed using M10 mortar and MU10 bricks (24mm wall). Windows should be opened on both sides to connect with the integrated pipeline trench. Simple steel ladders should be installed inside the inspection well for easy maintenance.

[0057] 3. Pipeline layout:

[0058] Pipeline type: The pipeline type is determined based on logistics needs, such as conveyor belts, pipes, etc.

[0059] Pipeline layout: Layout pipelines in a reasonable manner to avoid intersections and interference, and to facilitate maintenance and repair.

[0060] Pipeline fixing: Reliable fixing methods are used to prevent pipeline shaking and damage.

[0061] Safe distance: Maintain a safe distance between pipelines to prevent mutual interference.

[0062] 4. Ancillary facilities:

[0063] Maintenance access: A maintenance access is provided to facilitate staff access to the pipe trench for maintenance and repair.

[0064] Entrances and exits: Entrances and exits are set up to facilitate the entry and exit of goods and the passage of people.

[0065] Monitoring system: Set up a monitoring system to monitor the operation of the pipeline trench in real time.

[0066] Alarm system: Set up an alarm system to promptly detect and handle abnormal situations.

[0067] Fire protection facilities: Fire protection facilities shall be installed to ensure fire safety within the pipe trench.

[0068] 5. Design Considerations:

[0069] Safety: Ensure the structural and operational safety of the pipe trench.

[0070] Economic efficiency: Optimize the design scheme and reduce the project cost.

[0071] Maintainability: Facilitates the maintenance and repair of the pipe trench, reducing maintenance costs.

[0072] Environmental friendliness: Reduces the impact on the surrounding environment.

[0073] Scalability: Reserve space for future expansion to meet future development needs.

[0074] In summary, the design of underground logistics trenches requires comprehensive consideration of many factors, from site selection, structure, pipeline layout to ancillary facilities, all of which need careful design and planning to ensure their safe, economical, and efficient operation.

[0075] The design and construction of underground logistics trenches in industrial parks must comprehensively consider factors such as functional requirements, geological conditions, cost control, and long-term maintenance. The following are key practices and points:

[0076] Functional positioning

[0077] Clearly define the purpose of the utility trench (e.g., power, communications, water supply and drainage, gas, or integrated utility tunnel) and determine whether space needs to be reserved for future expansion.

[0078] Logistics industrial parks need to take into account special needs (such as cold chain pipelines, automated transportation lines, etc.).

[0079] Standards are based on national standards such as the Technical Specification for Urban Integrated Pipe Gallery Engineering (GB 50838) and the Code for Design of Building Foundations (GB 50007).

[0080] It complies with the overall plan of the industrial park and the requirements for the use of underground space.

[0081] The structural design of this application is as follows:

[0082] Cross-sectional shape: Rectangular (commonly used). The number of trench layers, dimensions, and burial depth need to be determined in conjunction with pipeline laying. Component dimensions and reinforcement are calculated based on the weight of the backfill soil and ground load. Circular, elliptical, or other irregular cross-sectional shapes can also be selected based on specific circumstances, but a comprehensive assessment of construction difficulty, space utilization, and impact on the surrounding environment is required. Rectangular cross-sections are widely used due to their ease of construction and efficient space utilization, making them particularly suitable for scenarios involving parallel laying of multiple pipelines. After determining the cross-sectional shape, the number of trench layers must be carefully planned to ensure that various pipelines are arranged in an orderly, layered manner, avoiding mutual interference and facilitating later inspection and maintenance. Dimension design must consider both current needs and future expansion possibilities, ensuring the trench has a certain degree of foresight. The burial depth must consider multiple factors such as ground load, groundwater level, and soil frost depth to ensure the safety and stability of the trench structure. Through precise mechanical calculations, component dimensions and reinforcement schemes are determined to meet the requirements of structural strength and durability.

[0083] Burial depth: usually ≥1.5 meters, avoiding frozen soil layers and areas with high groundwater levels.

[0084] In special geological conditions, such as soft soil foundations or high water levels, additional foundation treatment and waterproofing measures are required to ensure the stability and safety of the pipe trench. Furthermore, the selection of the burial depth must consider the foundation depth of above-ground structures to avoid conflicts between the pipe trench and the foundations. A reasonable burial depth design not only effectively protects the pipeline from damage by external factors but also reduces construction difficulty and costs, improving the overall economic efficiency of the project.

[0085] Waterproofing measures: Waterproof concrete with a waterproofing grade of level II or above is used, and the concrete is self-waterproofing plus an external waterproof membrane (such as SBS modified bitumen).

[0086] At critical nodes and joints, additional waterproofing layers such as waterstops or expansion plugs should be installed to enhance waterproofing. Simultaneously, the overlap width and construction quality of the waterproof membrane must be strictly controlled to ensure no leaks. For waterproof concrete, its impermeability grade should be rationally selected based on the actual project conditions to meet long-term waterproofing requirements. During construction, rigorous waterproofing tests must also be conducted to ensure the effectiveness of the waterproofing measures.

[0087] Foundation bearing layer: The foundation bearing layer of the pipe trench floor must meet the bearing capacity requirements of the pipe trench and the backfill soil, and the uneven settlement of the pipe trench caused by different bearing layers must be considered. If necessary, local foundation treatment is required.

[0088] When selecting the foundation bearing stratum, a detailed geological survey should be conducted to understand the soil type, bearing capacity, and deformation characteristics of the bearing stratum. For bearing strata with insufficient bearing capacity, their bearing capacity can be improved through foundation reinforcement treatments, such as grouting reinforcement and widening the foundation. Simultaneously, to address potential uneven settlement issues, measures such as setting settlement joints and adjusting the foundation type can be adopted to reduce the impact of uneven settlement on the trench structure. During the design and construction process, close monitoring of changes in the foundation bearing stratum is essential to ensure the stability and safety of the trench structure.

[0089] Excavation method:

[0090] Open-cut method: suitable for shallow burial areas with good geological conditions, low cost but requires temporary support.

[0091] Pipe jacking / shield tunneling: Used when crossing roads or buildings, it has little impact on the surrounding area but is costly.

[0092] Acceptance criteria: No structural leakage and stable settlement. Through systematic design and standardized construction, underground logistics trenches can significantly improve the reliability and efficiency of industrial park infrastructure.

[0093] Construction monitoring: During construction, the deformation, settlement, and groundwater level of the pipe trench must be monitored in real time to ensure construction safety. Any abnormalities, such as excessive settlement or cracks in the pipe trench, must be identified and addressed promptly.

[0094] Environmental protection: Take effective measures to mitigate the negative impact of construction on the surrounding environment, such as noise suppression and dust control.

[0095] During construction, work hours should be planned reasonably to avoid disturbing the lives of nearby residents.

[0096] Post-construction maintenance: Develop a comprehensive post-construction maintenance plan, and conduct regular inspections, cleaning, and repairs of the pipeline trenches. Establish an emergency response mechanism to ensure rapid response in the event of emergencies and guarantee smooth logistics transportation. By implementing the above key practices and points, the design and construction of the underground logistics pipeline trenches in the industrial park will be more scientific and rational, providing a solid guarantee for the long-term development of the industrial park.

[0097] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for underground logistics trenches in electronic cleanrooms, characterized in that: It includes a concrete underground logistics trench (1) and a logistics lifting well (2). Each production unit is connected by a concrete underground logistics trench (1) and a logistics lifting well (2), and production materials are transported to different production units by a hoist and a logistics conveyor belt. The main body of the logistics trench adopts a box-shaped waterproof reinforced concrete structure. The top of the concrete structure is covered by a cover plate (3) or an integral cast-in-place structure. When the integral cast-in-place structure is adopted, the cover plate should be installed in sections to facilitate the later pipeline laying or maintenance. The specific dimensions are determined according to the space for the pipeline to be placed in the trench. Then, the thickness of the structural side wall, top plate and bottom plate is designed according to the dimensions and the position of the cross section. For logistics trenches located under motor vehicle lanes, the effect of vehicle load on the trench must be considered, and the reasonable amount of steel reinforcement engineering should be configured through verification.

2. The structure for underground logistics trenches in electronic cleanrooms according to claim 1, characterized in that: The main body of the logistics trench has an upper process pipeline cavity (4) and a lower motor vehicle lane cavity (5); the space between them is filled with sand and gravel (6); the compaction coefficient is ≥0.94 and fak is not less than 120kpa.

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