Hollow high-strength prefabricated corrosion-resistant electromechanical pedestal and construction process thereof

Abstract

This invention belongs to the field of infrastructure fixing technology and provides a hollow high-strength prefabricated corrosion-resistant electromechanical base and its construction process. The hollow high-strength prefabricated corrosion-resistant electromechanical base includes a hollow high-strength prefabricated base body. The hollow high-strength prefabricated base body has a hollow structure, filled with polystyrene foam spacers, and its outer wall is a fiber-reinforced mortar structural layer. A steel reinforcement skeleton is pre-embedded within the fiber-reinforced mortar structural layer. Multiple reserved bolts for fixing upper equipment are pre-embedded at the top of the hollow high-strength prefabricated base body. The fiber-reinforced mortar structural layer contains silicate cement, river sand, steel fibers, alkali-resistant bundled glass fiber short filaments, and a polycarboxylate-based high-efficiency water-reducing agent. This invention achieves a balance between lightweight and high strength in the base, is convenient to construct, and is environmentally friendly. It is suitable for fixing outdoor electromechanical equipment such as charging piles and small communication control cabinets.

Description

Technical Field

[0001] This invention belongs to the field of infrastructure fixed technology, and in particular relates to hollow high-strength prefabricated corrosion-resistant electromechanical base and its construction process. Background Technology

[0002] With the continued rapid development of my country's new energy vehicle industry and the comprehensive coverage of 5G communication infrastructure, the demand for outdoor electromechanical equipment such as charging piles and small communication base station control cabinets is showing a rapid growth trend. These installation scenarios are largely distributed in unpaved areas, encompassing various types such as vacant land in urban residential areas, green belts along parking lots, both sides of rural roads, areas surrounding outdoor base stations, and unpaved sites in industrial parks. When carrying out equipment installation work in these areas, the construction quality, efficiency, and service life of the equipment foundation directly affect the entire project's construction cycle, construction cost, and subsequent operation and maintenance effectiveness, making it a core aspect of outdoor electromechanical equipment installation projects.

[0003] Currently, the industry commonly uses traditional solid precast concrete bases as the foundation support structure for fixing outdoor electromechanical equipment on unpaved surfaces. While this traditional base can meet the basic requirements for equipment foundation fixing, its inherent technical defects have gradually become apparent with the diversification of application scenarios and the expansion of construction scale, making it difficult to adapt to the actual needs of current industry development. Specifically, traditional solid precast concrete bases have several technical shortcomings: First, the base is a solid hexahedral structure, entirely cast from cement, sand, and water, without any weight-reduction design, resulting in a large overall weight. Transportation and installation require large lifting equipment such as forklifts and cranes, leading to low load utilization during long-distance transportation and high labor and machinery rental costs. Second, the construction process requires sequential completion of surveying and setting out, excavation, hoisting and positioning, backfilling, and construction waste removal, resulting in a long construction cycle. Excavation work damages the original vegetation and soil structure of the site, generating construction waste, which does not meet the requirements of green construction. Third, the base is made of ordinary cement mortar without any additives. The modified materials have weak tensile and flexural strength, and are prone to cracking and damage under long-term exposure to vehicle pressure, temperature changes, and natural weathering. The reinforcing steel is also prone to corrosion, resulting in a short service life of the base and high maintenance and replacement costs. Fourth, traditional bases rely solely on their own weight for fixation, making them susceptible to floating and tilting due to soil frost heave in permafrost regions. In saline-alkali lands and coastal areas with corrosive soils, they are easily corroded by chloride and sulfate ions, resulting in insufficient structural stability and environmental adaptability. Fifth, solid structures require large amounts of non-renewable resources such as cement and sand, and cement production and sand mining lead to resource consumption and environmental impact, which is inconsistent with the concept of green and low-carbon development.

[0004] Therefore, hollow, high-strength, prefabricated, corrosion-resistant electromechanical bases and their construction techniques are needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a hollow, high-strength, prefabricated, corrosion-resistant electromechanical base and its construction process to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hollow high-strength prefabricated corrosion-resistant electromechanical base and its construction process, comprising a hollow high-strength prefabricated base body; the hollow high-strength prefabricated base body is a hollow structure, filled with polystyrene foam spacers, and the outer wall is a fiber-reinforced mortar structural layer; a steel reinforcement skeleton is pre-embedded in the fiber-reinforced mortar structural layer; multiple reserved bolts for fixing the upper equipment are pre-embedded in the top of the hollow high-strength prefabricated base body; the fiber-reinforced mortar structural layer comprises silicate cement, river sand, steel fibers, alkali-resistant bundled glass fiber short filaments, and polycarboxylate-based high-efficiency water-reducing agent.

[0007] The hollow structure combined with polystyrene foam spacers significantly reduces concrete usage, resulting in a lightweight base that facilitates transportation and manual installation. The outer fiber-reinforced mortar layer, combined with the internal steel reinforcement skeleton, significantly enhances the base's tensile, flexural, and impact resistance. Pre-embedded bolts at the top ensure a secure connection to the upper equipment. The overall structure combines lightweight design with high strength, reducing material consumption and aligning with green environmental protection principles. It is suitable for the general needs of outdoor electromechanical equipment foundation fixing, demonstrating excellent practicality and versatility.

[0008] In a further technical solution, the hollow high-strength precast base body has a hollow structure with a single large square hole in the middle, and a fiber-reinforced mortar structure layer is formed around it. The steel reinforcement skeleton is composed of 4 threaded steel bars.

[0009] The structure features a single large square hole in the center forming a uniform outer load-bearing layer, complemented by a framework composed of four threaded steel bars. This concentrates and smoothly transmits stress, further reducing self-weight while ensuring structural rigidity. The mold for this structure is simple to manufacture, making production easy. It can meet the load requirements of typical scenarios, and the base exhibits strong overall stability, making it less prone to deformation and cracking. It is suitable for installation of most outdoor electromechanical equipment in residential areas and ordinary sites, balancing structural performance with production economy.

[0010] In a further technical solution, the hollow structure of the hollow high-strength precast base body is a structure of multiple evenly distributed round or square holes, and adjacent holes are interconnected by fiber-reinforced mortar structural layers.

[0011] The increased hollowness through multiple evenly distributed holes results in a lighter weight and more even stress distribution. The interconnection between adjacent structural layers enhances overall impact resistance. The porous design disperses external loads, reduces localized stress concentration, and makes the base less susceptible to damage from vehicle traffic and wind. Furthermore, the superior lightweight effect facilitates long-distance, large-volume transportation, making it suitable for large-scale project construction. It further optimizes transportation and construction convenience while ensuring strength.

[0012] A further technical solution is that the raw material ratio range of the fiber-reinforced mortar structural layer is: cement to river sand mass ratio 1:(1-2), steel fiber addition amount is 0.5%-1.5% of the total mortar mass, alkali-resistant bundled glass fiber short filament addition amount is 1%-3% of the total mortar mass, water usage is 45%-55% of the cement mass, and polycarboxylate-based high-efficiency water-reducing agent is used in appropriate amount.

[0013] By rationally blending cement, river sand, fiber, and water-reducing agents, the mechanical properties and workability of mortar can be controlled. The synergistic effect of steel fiber and glass fiber enhances crack resistance and flexural strength, making it suitable for various application scenarios. This mix ratio range covers a variety of needs, including conventional, crack-resistant, and high-strength mortars. The mortar has high density and good durability, can resist natural weathering and external forces, extends the service life of the foundation, and ensures long-term structural stability.

[0014] In a further technical solution, the reserved bolt is an M12 threaded steel bar, with the upper end extending 60mm beyond the top surface of the hollow high-strength precast base body, and the lower end welded and fixed to the steel reinforcement cage; the steel reinforcement cage is composed of 4 Φ12mm threaded steel bars.

[0015] The system employs M12 pre-installed bolts welded to a Φ12mm steel reinforcement cage to form an integrated load-bearing system. The pre-installed bolts exhibit excellent pull-out resistance, ensuring a secure and stable connection with the upper equipment. The steel reinforcement cage is arranged along the four corners, comprehensively enhancing the base's resistance to bending and lateral thrust. It effectively withstands horizontal loads such as vehicle collisions and wind forces, preventing equipment tilting and detachment. The bolt size and cage specifications are compatible with conventional electromechanical equipment, ensuring reliable connections, stable stress distribution, and safe equipment operation.

[0016] The construction process for hollow high-strength prefabricated corrosion-resistant electromechanical foundations, applied to any of the hollow high-strength prefabricated corrosion-resistant electromechanical foundations described above, includes the following steps:

[0017] S1: Site survey and layout, excavation of the foundation pit according to the design elevation, clearing debris and loose soil from the foundation pit, and compaction of the bottom of the foundation pit to the design bearing capacity requirements;

[0018] S2: Vertically place the hollow high-strength prefabricated corrosion-resistant base body into the foundation pit, and adjust the verticality and top surface elevation of the base to the design requirements;

[0019] S3: Backfill the foundation pit with plain soil in layers and compact it until it is level with the original ground surface;

[0020] S4: Secure the upper equipment to the base using the pre-installed bolts at the top to complete the installation.

[0021] The pit-embedded installation process is standardized and efficient, significantly shortening the installation cycle. The excavation area is controllable, minimizing damage to existing vegetation and soil, and reducing construction waste, thus meeting green construction requirements. The base is easily hoisted and positioned, which can be done using small machinery or manually, reducing construction costs and labor intensity. Equipment installation can be completed quickly, adapting to the construction needs of various unpaved road surfaces.

[0022] A further technical solution is that the manufacturing process of the hollow high-strength precast base body includes manual casting and machine spraying.

[0023] The manual casting process is as follows: the steel reinforcement cage is placed into a mold coated with release oil, polystyrene foam spacers are placed in, the prepared fiber-reinforced mortar is poured in, the surface is smoothed after vibration to remove air, and the steel reinforcement cage is sent to a constant temperature steam chamber of 25-35℃ for curing for 24 hours before demolding. It is then kept moist and cured for 28 days before leaving the factory.

[0024] The machine spraying process is as follows: the steel reinforcement skeleton is placed into the mold, a polystyrene foam spacer is placed in it, and fiber-reinforced mortar is sprayed into the mold using a special high-pressure device. The subsequent curing steps are the same as those of the manual pouring process.

[0025] We offer both manual pouring and machine spraying methods. Manual pouring is suitable for small-batch customization, while machine spraying is ideal for large-scale industrial production. High-pressure spraying makes the mortar denser, eliminates the need for vibration and venting, and ensures more consistent product quality. Constant temperature steam curing at 25-35℃ combined with 28 days of moist curing guarantees uniform and up-to-standard mortar strength. Both processes simplify the production process, eliminating the need to remove the foam spacers, thus improving production efficiency and catering to both small-batch customization and large-scale production needs.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] This invention, with its hollow structure filled with polystyrene foam spacers, can reduce the amount of concrete raw materials used, lower the overall weight of the base, and help reduce the use of hoisting equipment, thereby reducing transportation and construction costs.

[0028] This invention adopts a pit-buried installation process, which simplifies the construction process, shortens the construction cycle, and controls the extent of damage to site vegetation and soil during construction, thus meeting the development requirements of green construction.

[0029] This invention provides a fiber-reinforced mortar structural layer that is reinforced with a composite of steel fibers and glass fibers. This enhances the tensile, flexural, and crack resistance of the base, improves its durability, and extends its service life.

[0030] This invention, by adjusting the mortar mix ratio and the base structure, can be adapted to various scenarios such as ordinary soil, high compaction, heavy load, and corrosive soil, and can meet the fixing needs of different types of outdoor electromechanical equipment.

[0031] This invention features a hollow structure that saves non-renewable resources such as cement and sand, and eliminates the need to remove the polystyrene foam spacer, simplifying the production process, improving resource utilization efficiency, and reducing energy consumption in the production process.

[0032] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0033] Figure 1 This is a frontal three-dimensional structural schematic diagram of the single-hole prefabricated base of the present invention;

[0034] Figure 2 This is a bottom-view three-dimensional structural diagram of the fiber-reinforced mortar structural layer of the single-hole precast base of the present invention;

[0035] Figure 3 This is a frontal three-dimensional structural schematic diagram of the porous prefabricated base of the present invention;

[0036] Figure 4 This is a frontal three-dimensional structural schematic diagram of the porous prefabricated base fiber-reinforced mortar structural layer of the present invention;

[0037] Figure 5 This is a three-dimensional structural diagram of the steel reinforcement cage of the present invention.

[0038] Figure 6 This is a schematic diagram of the overall process of the present invention.

[0039] In the figure: 1. Hollow high-strength precast base body; 11. Fiber-reinforced mortar structural layer; 12. Hollow hole; 2. Polystyrene foam occupier; 3. Reinforcing steel skeleton; 4. Reserved bolts. Detailed Implementation

[0040] The present invention will be further described below with reference to embodiments.

[0041] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0042] Example 1: Standard single-hole base for charging piles in ordinary residential areas

[0043] This embodiment provides a hollow, high-strength, corrosion-resistant prefabricated electromechanical base with a single large square hole in the middle, standard proportions, and hand casting process. It is mainly suitable for charging pile installation scenarios in ordinary soil areas and residential areas with low vehicle traffic frequency, and can meet the foundation fixing requirements of 7KW-60KW AC charging piles.

[0044] The cross-sectional dimensions of the hollow high-strength precast base body 1 are designed according to the specifications of the charging pile base, and the height is determined in conjunction with local climate conditions. The base body adopts a hollow structure with a single large square hole in the middle, and a 50mm thick fiber-reinforced mortar structural layer 11 is formed around it. This structure concentrates the load-bearing material on the periphery, reducing the amount of concrete used and lowering the self-weight of the base while ensuring structural strength and rigidity. It can be manually transported and positioned without the need for large hoisting equipment. A steel reinforcement skeleton 3 composed of four Φ12mm threaded steel bars is pre-embedded in the fiber-reinforced mortar structural layer 11. The steel reinforcement skeleton is arranged vertically along the four corners of the base body, and the upper end is welded to the top reserved bolts 4 to form an integral load-bearing frame, which works together with the fiber-reinforced mortar to improve the tensile and flexural strength of the base. The hollow area of ​​the base body is filled with polystyrene foam spacers 2. The size of the spacers is precisely matched with the hollow hole. They do not need to be removed during pouring, which can play a role in spacer, weight reduction, and control of structural layer thickness, simplifying the production process.

[0045] Four pre-embedded bolts made of M12 threaded steel bars are embedded in the top of the base body. The upper end of the bolt extends 60mm beyond the top surface of the base and is used to connect to the charging pile base. The pre-embedded connection can improve the pull-out resistance of the bolt and ensure the stability of the equipment. The fiber-reinforced mortar structural layer 11 adopts a standard ratio: silicate cement 425# to river sand in a mass ratio of 1:1.5, steel fiber addition of 1% of the total mortar mass, alkali-resistant bundled glass fiber short filament addition of 2% of the total mortar mass, water content of 50% of cement mass, and appropriate amount of polycarboxylate-based high-efficiency water-reducing agent. This ratio can enable the 50mm thick structural layer to achieve high mechanical strength and is suitable for the general use scenario in the community.

[0046] The base is fabricated using a manual casting process, sequentially completing steps such as steel reinforcement frame fabrication, mold oiling, placement of the frame and occupant, mortar mixing, pouring and vibration, surface smoothing, constant temperature steam curing, and demolding and moisturizing curing. After 24 hours of constant temperature steam curing at 25-35℃, the base is demolded and then moisturized for another 28 days before being ready for shipment. During construction, site surveying and layout are conducted first. The foundation pit is excavated according to the design elevation, debris is cleared from the pit, and the bottom is compacted to the design bearing capacity requirements. The base is then vertically placed into the pit, and its verticality and top elevation are adjusted to the design requirements. The pit is backfilled with plain soil in layers and compacted until level with the original ground level. Finally, the charging pile is fixed with pre-installed bolts, completing the installation. The entire construction process is simple and standardized, allowing for rapid completion of the charging pile foundation construction.

[0047] Example 2: High Crack-Resistant Base for Urban Public Parking Lots

[0048] This embodiment provides a hollow, high-strength, corrosion-resistant precast electromechanical base with a high crack resistance ratio, single-hole structure, and hand-casting process. It is mainly suitable for urban public parking lots, shopping mall parking lots, office building parking lots, and other scenarios with frequent vehicle traffic and large temperature variations. It can improve the crack resistance of the base and adapt to the long-term repeated load environment.

[0049] The base structure remains consistent with Example 1, employing a hollow structure with a single large square hole in the center. The fiber-reinforced mortar structural layer 11 is still 50mm thick, the reinforcing steel skeleton 3 consists of four Φ12mm threaded steel bars, and M12 pre-installed bolts 4 are provided at the top. The overall structure is adapted to the fixing requirements of charging piles in public parking lots. The core optimization point of this example is the raw material ratio of the fiber-reinforced mortar. By adjusting the raw material ratio, the crack resistance of the mortar is improved. The specific ratio is: silicate cement 425# to river sand in a mass ratio of 1:1.2, steel fiber addition is 0.8% of the total mortar mass, alkali-resistant bundled glass fiber short filaments are increased to 3% of the total mortar mass, water content is 48% of the cement mass, and a suitable amount of polycarboxylate-based high-efficiency water-reducing agent is added. The alkali-resistant bundled glass fiber short filaments can form a three-dimensional network structure inside the mortar, which can disperse stress, inhibit the generation and propagation of micro-cracks, improve the crack resistance of the mortar, and adapt to the usage scenarios of repeated vehicle rolling and large outdoor temperature changes in public parking lots, reducing the probability of base cracking and damage.

[0050] The base is manufactured using a manual casting process, identical to that of Example 1. This includes steps such as welding the reinforcing steel frame, preparing the mold, placing the locator, mixing and pouring the mortar, and vibration curing, ensuring a dense and dimensionally accurate base structure. The construction process is consistent with Example 1. Leveraging the performance advantages of high-crack-resistant mortar, this base maintains structural integrity under long-term repeated loading and temperature stress, reducing the frequency of subsequent maintenance. It is suitable for the high-frequency use needs of public areas and solves the problem of traditional bases easily cracking under high-compaction conditions.

[0051] Example 3: High-strength base for heavy-duty areas

[0052] This embodiment provides a hollow, high-strength, prefabricated, corrosion-resistant electromechanical base with a high-strength ratio, single-hole structure, and hand-casting process. It is mainly suitable for heavy-duty vehicle traffic areas such as logistics parks, industrial parks, and highway service areas, as well as installation scenarios for large DC charging piles of 120kW and above. It can improve the base's bending and impact resistance and meet the support requirements of heavy loads.

[0053] The hollow high-strength precast base body 1 adopts a single large square hole hollow structure. The fiber-reinforced mortar structural layer 11 is 80mm thick. The steel reinforcement skeleton 3 and the reserved bolts 4 are the same as in Example 1. The overall structure retains the stress-bearing advantages of the single-hole base, while improving the load-bearing capacity through mortar mix optimization. In this example, the fiber-reinforced mortar structural layer 11 adopts a high-strength mix ratio, specifically: silicate cement 425# and river sand in a mass ratio of 1:1.8, the steel fiber addition is increased to 1.2% of the total mortar mass, the alkali-resistant bundled glass fiber short filament addition is 1.5% of the total mortar mass, the water content is 52% of the cement mass, and a suitable amount of polycarboxylate-based high-efficiency water-reducing agent is added. The steel fiber can effectively improve the flexural strength and toughness of the mortar, enhance the base's ability to withstand bending and impact loads, resist the crushing of heavy vehicles and the self-weight load of large DC charging piles, avoid problems such as base breakage and damage, and adapt to the usage requirements of heavy-duty areas.

[0054] The base is manufactured using a hand-casting process, strictly following the procedures of mold preparation, frame placement, mortar pouring, steam curing, and moisture retention curing to ensure the mortar strength meets standards. During construction, site surveying and layout are conducted first. The foundation pit is excavated according to the design elevation, debris is cleared from the pit, and the bottom is compacted to the design bearing capacity requirements. The base is then vertically placed into the pit, and its verticality and top elevation are adjusted to the design requirements. The pit is backfilled with plain soil in layers and compacted until level with the original ground level. Finally, the large DC charging pile is secured with pre-installed bolts, completing the installation. This base can adapt to the complex stress environment of areas with heavy vehicle traffic, improving the stability of outdoor electromechanical equipment foundations and solving the problem of insufficient load-bearing capacity of traditional bases in heavy-load scenarios.

[0055] Example 4: Industrialized mass production of porous base

[0056] This embodiment provides a hollow, high-strength, prefabricated, corrosion-resistant electromechanical base with a porous mesh structure, standard proportions, and machine spraying process. It is mainly suitable for large-scale construction projects such as urban charging pile clusters, full coverage of charging piles in towns and villages, and charging pile clusters in highway service areas. It can improve production efficiency and meet the needs of long-distance transportation and industrial production.

[0057] The hollow high-strength precast base body 1 adopts a porous hollow structure with multiple evenly distributed round or square holes inside. Adjacent holes are connected by a fiber-reinforced mortar structural layer 11 to form a grid-like load-bearing structure. This structure has a higher hollow ratio than a single-hole structure, which can further reduce the self-weight of the base and improve the uniformity of stress and impact resistance. The base is filled with polystyrene foam spacers 2 that match the size of the porous structure. They do not need to be removed and are shipped directly with the base. The fiber-reinforced mortar structural layer 11 is also pre-embedded with a steel reinforcement skeleton 3 consisting of four Φ12mm threaded steel bars. The steel reinforcement skeleton passes through the four corners of the grid structural layer and is welded to the pre-installed bolts 4 at the top to ensure that the overall load-bearing performance is not affected.

[0058] The base is fabricated using a machine-sprayed process, replacing traditional manual casting. The specific process is as follows: After completing the steel reinforcement frame fabrication and mold preparation, standard-proportion fiber-reinforced mortar is poured into a high-pressure spraying device. The mortar is then evenly sprayed into the mold using a spray gun. High-pressure spraying ensures dense filling of the mortar particles, eliminating internal air bubbles and eliminating the need for additional vibration and venting, thus improving the product's density and strength. After spraying, the surface is smoothed and the product is placed in a 25-35℃ constant-temperature steam chamber for 24 hours before demolding. It then continues to be moisturized for 28 days before being shipped. The machine-sprayed process offers higher production efficiency, better product quality consistency, and is suitable for large-scale industrial production. The construction process is the same as for single-hole bases: after leveling the site, the multi-hole base is laid and positioned, and the upper equipment is secured. The lightweight multi-hole base is more suitable for long-distance, large-volume transportation, reducing transportation costs and meeting the construction needs of large-scale projects.

[0059] Example 5: Corrosion-resistant base for saline-alkali / coastal areas

[0060] This embodiment provides a hollow, high-strength, prefabricated, corrosion-resistant electromechanical base with a single-hole structure, standard mix ratio, optimized density, and manual casting process. It is mainly suitable for corrosive soil areas such as coastal mudflats, inland saline-alkali land, and chemical industrial parks. The corrosion resistance is achieved by increasing the density of the mortar, thus extending the service life of the base in corrosive environments.

[0061] The hollow high-strength precast base body 1 adopts a single large square hole structure in the middle. The fiber-reinforced mortar structural layer 11 is 50mm thick. The specifications of the steel reinforcement skeleton 3 and the reserved bolts 4 are consistent with those in Example 1. The overall structure is suitable for the fixing requirements of charging piles and communication equipment in corrosive areas. This example does not add any additional corrosion-resistant admixtures. Relying on the optimization of the fiber-reinforced mortar's own proportion and the control of construction process, the mortar density is improved, blocking the penetration path of corrosive media such as chloride ions and sulfate ions, thus achieving structural corrosion resistance. The mortar adopts the standard proportion of Example 1. The dry mixing time is extended during mixing to ensure that the steel fibers and glass fibers are evenly dispersed. During pouring, sufficient vibration is used to vent air, improve the mortar density, reduce internal porosity, reduce the probability of corrosive media intrusion, and protect the internal steel reinforcement skeleton and mortar structure.

[0062] The base is constructed using a manual casting process, with strict control over parameters in each stage of mixing, pouring, and curing to ensure the mortar density meets standards. The construction process employs a pit-embedded installation method. First, site surveying and layout are conducted. The pit is then excavated according to the design elevation, debris is cleared, and the bottom is compacted to form a solid support surface. The miniaturized base is vertically placed into the pit, and its verticality and elevation are adjusted. Layered backfill with plain soil is then compacted until level with the original ground level. Finally, the upper electromechanical equipment is secured using pre-installed bolts. This base not only resists soil corrosion due to its dense structure and maintains structural stability in severely saline-alkali land and coastal high-salt-fog environments, but also features a corrosion-resistant and salt-alkali-resistant coating on its outer wall. This addresses the problems of traditional bases being prone to deterioration and having a short service life in corrosive soil areas, making it suitable for equipment fixing needs in special geological regions.

[0063] Example 6: Miniaturized base for small communication control cabinets

[0064] This embodiment provides a miniaturized, single-hole structure, standard proportion, and hand-cast hollow high-strength corrosion-resistant electromechanical base, which is mainly suitable for fixing lightweight outdoor electromechanical equipment such as small communication base station control cabinets, traffic signs, and small distribution boxes. The base specifications can be reduced according to the weight and size of the equipment to reduce material costs and adapt to the installation needs of lightweight equipment.

[0065] The hollow high-strength precast base body 1 has a reduced cross-sectional size based on the dimensions of a small communication control cabinet base, employing a hollow structure with a single large square hole in the center. The fiber-reinforced mortar structural layer 11 maintains a thickness of 50mm to ensure structural strength. The reinforcing steel skeleton 3 uses four Φ12mm threaded steel bars, and the number and position of the top-mounted bolts 4 are adjusted according to the mounting holes of the communication control cabinet base to ensure precise equipment connection. The fiber-reinforced mortar structural layer 11 uses the standard mix ratio of Example 1, and the manufacturing process is manual casting, consistent with Example 1, ensuring a balance between lightweight and high strength for the base.

[0066] The construction process employs a pit-embedded installation method. First, site surveying and layout are conducted. Then, a pit is excavated according to the design elevation. Debris within the pit is cleared, and the bottom is compacted to form a solid support surface. The miniaturized base is vertically placed into the pit, and its verticality and elevation are adjusted. Plain soil is backfilled in layers and compacted until level with the original ground level. Finally, the miniature communication control cabinet is secured using pre-installed bolts on the top, completing the installation. This base is lightweight and easy to install, meeting the wind and vibration resistance requirements of lightweight outdoor electromechanical equipment. It fully demonstrates the versatility and flexibility of this invention, not only suitable for charging pile equipment but also covering small communication, power, and transportation outdoor equipment, broadening its application range. While ensuring effective fixation, it reduces the construction cost of lightweight equipment foundations.

[0067] Working principle and usage process of this invention:

[0068] This invention uses a hollow high-strength precast base body 1 as the core support structure for outdoor electromechanical equipment. The fiber-reinforced mortar structural layer 11 and the internally embedded steel reinforcement skeleton 3 form a synergistic stress system. The mortar layer bears compressive stress, and the steel reinforcement skeleton bears tensile stress, which together improves the tensile, flexural and impact resistance of the base and ensures the structural stability of the base under various loads.

[0069] The polystyrene foam spacer 2 inside the hollow high-strength precast base body 1 occupies the hollow space, reduces the amount of concrete used, achieves lightweight base, and facilitates transportation and manual installation; on the other hand, the foam spacer does not need to be removed, and the thickness of the fiber-reinforced mortar structural layer 11 can be precisely controlled, simplifying the production process and improving the dimensional accuracy of the product.

[0070] The construction process employs a pit-embedded installation technique. By excavating the pit and backfilling and compacting in layers, the base and surrounding soil form an integrated load-bearing system. The lateral restraint of the backfill soil, the friction between the base's bottom and the pit bottom, and the base's own weight collectively ensure stable fixation, effectively resisting horizontal loads and overturning moments, thus guaranteeing the long-term safe operation of the equipment. Vertical and horizontal loads generated by the upper electromechanical equipment are transferred to the reinforcing steel frame 3 via pre-embedded bolts 4 at the top, and then from the steel frame 3 to the hollow high-strength precast base body 1, ultimately borne by the ground bearing capacity, ensuring the equipment's secure and reliable fixation.

[0071] This invention, through its integrated design of hollow lightweight, fiber-reinforced, and pit-embedded installation, takes into account the structural performance, ease of construction, and environmental friendliness of the base. It is adaptable to various scenarios such as unpaved roads, ordinary soil, frozen soil edges, saline-alkali land, and heavy-load areas, and is widely used for the foundation fixing of outdoor electromechanical equipment such as charging piles, small communication control cabinets, small distribution boxes, and traffic signs, providing an efficient, durable, and green technical solution for the foundation construction of outdoor electromechanical equipment.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hollow, high-strength, prefabricated, corrosion-resistant electromechanical base, characterized in that, The structure includes a hollow high-strength precast base body (1); the hollow high-strength precast base body (1) is a hollow structure, filled with polystyrene foam spacers (2), and the outer wall is a fiber-reinforced mortar structure layer (11); a steel reinforcement skeleton (3) is embedded in the fiber-reinforced mortar structure layer (11); a number of reserved bolts (4) for fixing the upper equipment are embedded in the top of the hollow high-strength precast base body (1); the fiber-reinforced mortar structure layer (11) contains silicate cement, river sand, steel fiber, alkali-resistant bundled glass fiber short filaments and polycarboxylate-based high-efficiency water-reducing agent.

2. The hollow high-strength prefabricated corrosion-resistant electromechanical base according to claim 1, characterized in that, The hollow high-strength precast base body (1) has a hollow structure with a single large square hole in the middle and a fiber-reinforced mortar structure layer (11) around it. The steel reinforcement skeleton (3) is composed of 4 threaded steel bars.

3. The hollow high-strength prefabricated corrosion-resistant electromechanical base according to claim 1, characterized in that, The hollow high-strength precast base body (1) has a hollow structure consisting of multiple evenly distributed round or square holes, with adjacent holes connected to each other by a fiber-reinforced mortar structure layer (11).

4. The hollow high-strength prefabricated corrosion-resistant electromechanical base according to claim 1, characterized in that, The raw material ratio range of the fiber-reinforced mortar structural layer (11) is as follows: cement to river sand mass ratio 1:(1-2), steel fiber addition amount is 0.5%-1.5% of the total mortar mass, alkali-resistant bundled glass fiber short filament addition amount is 1%-3% of the total mortar mass, water usage is 45%-55% of the cement mass, and polycarboxylate-based high-efficiency water-reducing agent is used in appropriate amount.

5. The hollow high-strength prefabricated corrosion-resistant electromechanical base according to claim 2, characterized in that, The reserved bolt (4) is an M12 threaded steel bar, with the upper end extending 60mm beyond the top surface of the hollow high-strength precast base body (1) and the lower end welded and fixed to the steel reinforcement skeleton (3); the steel reinforcement skeleton (3) is composed of 4 Φ12mm threaded steel bars.

6. The construction process for a hollow high-strength prefabricated corrosion-resistant electromechanical base, applied to the hollow high-strength prefabricated corrosion-resistant electromechanical base as described in any one of claims 1-5, is characterized in that... Includes the following steps: S1: Site survey and layout, excavation of the foundation pit according to the design elevation, clearing debris and loose soil from the foundation pit, and compaction of the bottom of the foundation pit to the design bearing capacity requirements; S2: Vertically place the hollow high-strength prefabricated corrosion-resistant base body into the foundation pit, and adjust the verticality and top elevation of the base to the design requirements; S3: Backfill the foundation pit with plain soil in layers and compact it until it is level with the original ground surface; S4: Secure the upper equipment to the base using the pre-installed bolts at the top to complete the installation.

7. The construction process of the hollow high-strength prefabricated corrosion-resistant electromechanical base according to claim 6, characterized in that, The manufacturing process of the hollow high-strength precast base body (1) includes manual casting process and machine spraying process; The manual casting process is as follows: the steel reinforcement skeleton (3) is placed into the mold coated with release oil, the polystyrene foam occupier (2) is placed in, the prepared fiber-reinforced mortar is poured, the surface is smoothed after vibration and degassing, and the material is sent into a 25-35℃ constant temperature steam chamber for curing for 24 hours before demolding. After continuing to moisturize and cure for 28 days, the material is shipped out. The machine spraying process is as follows: the steel reinforcement skeleton (3) is placed into the mold, the polystyrene foam occupier (2) is placed in the mold, and the fiber-reinforced mortar is sprayed into the mold through a special high-pressure equipment. The subsequent curing steps are the same as the manual pouring process.

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