Street lamp foundation structure

Abstract

The utility model provides a street lamp foundation structure which comprises a street lamp foundation and a street lamp hand hole well arranged beside the street lamp foundation. A foundation bolt embedded part is embedded in the street lamp foundation, and a street lamp pole is connected to the upper portion of the foundation bolt embedded part. A wire penetrating pipe is arranged in the street lamp pole, and a street lamp main cable penetrates through the wire penetrating pipe. The threading pipe is embedded into the street lamp foundation after being led out from the interior of the street lamp pole, and the threading pipe extends out of the street lamp foundation to be connected into the street lamp hand hole well; and a grounding electrode is arranged in the street lamp hand hole well and is electrically connected with a grounding wire of the street lamp main cable. The structure is simple and reasonable, the integrity is high, the structural strength and stability of the street lamp foundation are improved, and the structural stability of the street lamp post is improved; the power supply safety of use and maintenance of the street lamp is improved, and damage is reduced; the original pavement milling material is used for street lamp foundation construction, so that the construction is simple, the cost is reduced, the emission of construction wastes is reduced, the pollution is reduced, and the environment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal engineering, and particularly relates to a street lamp foundation structure. Background Art

[0002] A street lamp is a lamp body structure that provides lighting function for roads. Generally, it refers to a series of lamp bodies installed on columnar members and separated along the driving direction of streets or roads. Street lamps are widely used in various places that require road lighting. As an essential part of street lamp installation, the street lamp foundation plays a crucial role in the structural stability of the street lamp main body. The firmness and solidity of the street lamp foundation directly affect the service life and safety of the street lamp.

[0003] However, the existing street lamp foundation structures generally have the following difficulties and disadvantages in the construction and use processes:

[0004] 1. A large amount of concrete pouring is not only time-consuming and laborious, but also relatively expensive, causing pressure on concrete raw material resources and not conforming to the concept of sustainable development.

[0005] 2. Affected by factors such as seasons and weather, unpredictable power supply safety problems are likely to occur during the use and maintenance of street lamps.

[0006] 3. The stability of the street lamp pole is poor: when installing the street lamp pole, due to factors such as an unstable foundation, the installation is unstable, leading to potential safety hazards such as pole body inclination and local damage of the pole body.

[0007] 4. For temporary lighting projects, the project cycle time is relatively short. Using traditional concrete pouring not only causes resource waste, but also cannot effectively recycle resources, having an adverse impact on the environment. Content of the Utility Model

[0008] In view of this, the purpose of the utility model is to design a street lamp foundation structure to improve the structural strength and stability of the street lamp foundation, thereby improving the structural stability of the street lamp pole, simplifying the process, and reducing costs; designing a grounding electrode and a grounding electrode protection cap structure to improve the power supply safety during the use and maintenance of street lamps and reduce the occurrence of damages; using the original road surface milling material for the construction of the street lamp foundation, with simple construction, reduced costs, and reduced emissions of construction waste, reduced pollution, and environmental protection.

[0009] The utility model provides a street lamp foundation structure, including: a street lamp foundation and a street lamp handhole well, where the street lamp handhole well is arranged beside the street lamp foundation; a foundation bolt embedded part is embedded inside the street lamp foundation, and a street lamp pole is connected above the foundation bolt embedded part;

[0010] Inside the street lamp pole, there is a conduit for threading wires, and a main street lamp cable is threaded through the conduit. After the conduit extends out from inside the street lamp pole, it is embedded in the street lamp foundation, and the conduit extends out from the street lamp foundation and is connected to the street lamp handhole well.

[0011] Inside the street lamp handhole well, there is a grounding electrode, and the grounding electrode is electrically connected to the grounding wire of the main street lamp cable. Since street lamps are mainly installed outdoors and are greatly affected by the natural environment, involving equipment and personal safety, especially in rainy days when electric leakage is likely to occur, more safety measures need to be strengthened. Therefore, the street lamp cable must be grounded to ensure the power supply safety of the street lamp cable.

[0012] Furthermore, the embedded part of the anchor bolts includes: a plurality of longitudinal steel bars, a plurality of transverse steel bars, a positioning flange, and a street lamp flange arranged in sequence from bottom to top. The plurality of longitudinal steel bars are evenly arranged at 360° around the circumference of the positioning flange. The lower end of the longitudinal steel bar is bent to form a hook-shaped structure. The plurality of transverse steel bars are fixedly connected between the plurality of longitudinal steel bars. The longitudinal steel bars are fixedly connected to the positioning flange. The street lamp flange is detachably connected to the positioning flange through anchor bolts, and the center of the street lamp flange is fixedly connected to the street lamp pole.

[0013] Furthermore, the longitudinal steel bars are welded to the positioning flange. The longitudinal steel bars and the positioning flange are connected into one body by welding, which improves the structural integrity and stability of the embedded part of the anchor bolts.

[0014] Furthermore, the angle of the hook-shaped structure formed by bending the lower end of the longitudinal steel bar is 25 - 35°, preferably 30°. When the hook-shaped structure at the lower end of the longitudinal steel bar is within this angle range, it can be firmly embedded in the street lamp foundation and will not be pulled out, enhancing the overall installation stability of the embedded part of the anchor bolts and improving the overall structural strength of the street lamp foundation.

[0015] Furthermore, the number of the longitudinal steel bars is set to 6. The 6 longitudinal steel bars are evenly arranged at 360° around the circumference of the positioning flange, which can evenly bear the gravity load of the upper street lamp pole and make the force on the street lamp foundation uniform, ensuring the structural stability of the street lamp foundation.

[0016] Furthermore, the grounding electrode is an angle steel grounding electrode. The angle steel grounding electrode is driven into the soil for grounding the main street lamp cable.

[0017] Furthermore, a grounding electrode protection cap is fixedly connected above the grounding electrode. The grounding electrode protection cap avoids the direct contact between the angle steel grounding electrode and the sledgehammer when driving the angle steel grounding electrode into the soil, effectively preventing damage to the top of the angle steel grounding electrode.

[0018] Further, the angle steel grounding electrode is made of a 50mm * 50mm galvanized angle steel, with a thickness of 5mm and a length of 2.5m. The galvanized angle steel has the characteristics of surface gloss, no dripping, and strong corrosion resistance. In a suburban environment, the standard hot-dip galvanized anti-rust thickness can be maintained for more than 50 years without repair, improving the weather resistance and reliability of the grounding electrode.

[0019] Further, the diameter of the longitudinal steel bar is φ28mm, the diameter of the transverse steel bar is φ10mm, the outer diameters of the positioning flange and the street lamp flange are both φ500mm, the thickness of the positioning flange is 6mm, the thickness of the street lamp flange is 25mm, the diameter of the anchor bolt is M27mm, the depth of the street lamp foundation is 1.8m below the road shoulder, and the joint surface of the positioning flange and the street lamp flange is 100mm away from the top surface of the street lamp foundation.

[0020] In the present utility model, the components of the street lamp foundation and the anchor bolt embedded parts are assembled with the above-mentioned design dimensions, ensuring that the anchor bolt embedded parts have high structural strength and mechanical properties, and guaranteeing the structural stability of the entire street lamp foundation.

[0021] Further, the street lamp foundation is built with C25 concrete and / or the original road surface milling material.

[0022] The original road surface milling material is an asphalt and stone mixture scraped off from the original damaged asphalt sand road surface by a milling machine. The original road surface milling material is used as the backfill material of the original road surface for the cushion foundation, reducing the emission of construction waste, saving costs, reducing pollution, and protecting the environment.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] The street lamp foundation structure of the present utility model is simple and reasonable, with strong integrity, improving the structural strength and stability of the street lamp foundation, and further improving the structural stability of the street lamp pole. Moreover, the process is simplified and the cost is reduced; through the structural design of the grounding electrode and the grounding electrode protection cap, the power supply safety of street lamp use and maintenance is improved, and the occurrence of damage is reduced; the original road surface milling material is used for the construction of the street lamp foundation, the construction is simple, the cost is reduced, and the emission of construction waste is reduced, the pollution is reduced, and the environment is protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0026] Figure 1 Schematic cross-sectional structure diagram of the street lamp foundation structure according to an embodiment of the present utility model;

[0027] Figure 2 Schematic structure diagram of the embedded part of the anchor bolt according to an embodiment of the present utility model;

[0028] Figure 3 Plan view of the street lamp foundation according to an embodiment of the present utility model;

[0029] Figure 4 Plan view of the grounding electrode protection cap according to an embodiment of the present utility model;

[0030] Figure 5 Schematic installation structure diagram of the grounding electrode according to an embodiment of the present utility model.

[0031] The reference signs in the accompanying drawings are shown as follows:

[0032] 1. Street lamp foundation, 2. Embedded part of anchor bolt, 21. Longitudinal steel bar, 22. Transverse steel bar, 23. Positioning flange, 24. Street lamp flange, 25. Anchor bolt, 3. Conduit, 4. Street lamp pole, 5. Road shoulder, 6. Grounding electrode protection cap, 7. Grounding electrode, 8. Street lamp manhole. Detailed implementation manners

[0033] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The following specifically describes the embodiments of the present utility model with reference to the drawings:

[0037] The embodiment of the present utility model provides a street lamp foundation structure. Referring to Figure 1 , 5 as shown, it includes: a street lamp foundation 1 and a street lamp manhole 8, and the street lamp manhole 8 is arranged beside the street lamp foundation 1; an anchor bolt embedded part 2 is embedded inside the street lamp foundation 1, and a street lamp pole 4 is connected above the anchor bolt embedded part 2;

[0038] The street lamp foundation 1 is built with C25 concrete and the milled material of the original road surface.

[0039] A conduit 3 is arranged inside the street lamp pole 4, and a main street lamp cable is threaded through the conduit 3; after the conduit 3 is led out from inside the street lamp pole 4, it is embedded in the street lamp foundation 1, and the conduit 3 extends out from the street lamp foundation 1 and is connected to the street lamp manhole 8;

[0040] A grounding electrode 7 is arranged inside the street lamp manhole 8, and the grounding electrode 7 is electrically connected to the grounding wire of the main street lamp cable.

[0041] The anchor bolt embedded part 2 (referring to Figure 2 as shown) includes: a plurality of longitudinal steel bars 21, a plurality of transverse steel bars 22, a positioning flange 23, and a street lamp flange 24 arranged in sequence from bottom to top. The plurality of longitudinal steel bars 21 are evenly arranged in a 360° circumferential direction of the positioning flange 23 (referring to Figure 3 as shown). The lower end of the longitudinal steel bar 21 is bent to form a hook-shaped structure, and the plurality of transverse steel bars 22 are fixedly connected between the plurality of longitudinal steel bars 21; the longitudinal steel bar 21 is fixedly connected to the positioning flange 23; the street lamp flange 24 is detachably connected to the positioning flange 23 through an anchor bolt 25, and the center of the street lamp flange 24 is fixedly connected to the street lamp pole 4.

[0042] In this embodiment, 6 longitudinal steel bars 21 are arranged evenly in a 360° circumferential direction of the positioning flange 23 (referring to Figure 3As shown, the six longitudinal steel bars 21 can evenly bear the gravity load of the upper street lamp pole 4, and make the force on the street lamp foundation 1 uniform, ensuring the structural stability of the street lamp foundation 1.

[0043] The angle of the hook-shaped structure formed by bending the lower end of the longitudinal steel bar 21 is 30°. The hook-shaped structure at the lower end of the longitudinal steel bar 21 is designed at this angle, which can be firmly embedded in the street lamp foundation 1 without being pulled out, enhancing the installation stability of the overall anchor bolt embedded part 2 and improving the overall structural strength of the street lamp foundation 1.

[0044] The longitudinal steel bar 21 and the positioning flange 23 are welded together as a whole, improving the structural integrity and stability of the anchor bolt embedded part 2. The diameter of the longitudinal steel bar 21 is φ28mm, the diameter of the transverse steel bar 22 is φ10mm, the outer diameters of the positioning flange 23 and the street lamp flange 24 are both φ500mm, the thickness of the positioning flange 23 is 6mm, the thickness of the street lamp flange 24 is 25mm, the diameter of the anchor bolt 25 is M27mm, the depth of the street lamp foundation 1 is 1.8m below the road shoulder 5, and the joint surface of the positioning flange 23 and the street lamp flange 24 is 100mm away from the top surface of the street lamp foundation 1.

[0045] In this embodiment, the components of the street lamp foundation 1 and the anchor bolt embedded part 2 are assembled with the above design dimensions, improving the structural strength and mechanical properties of the anchor bolt embedded part 2 and ensuring the structural stability of the entire street lamp foundation 1.

[0046] The grounding electrode 7 uses an angle steel grounding electrode (see Figure 4 As shown). The angle steel grounding electrode is driven into the soil for grounding the main cable of the street lamp. The angle steel grounding electrode uses a 50mm * 50mm galvanized angle steel, the thickness of the angle steel is 5mm, and the length of the angle steel is 2.5m.

[0047] A grounding electrode protection cap 6 is fixedly connected above the grounding electrode 7. The grounding electrode protection cap 6 avoids the direct contact between the angle steel grounding electrode and the sledgehammer when driving it into the soil, effectively preventing damage to the top of the angle steel grounding electrode.

[0048] The street lamp foundation structure provided by the embodiment of the present utility model has a simple and reasonable structure, strong integrity, improving the structural strength and stability of the street lamp foundation, thereby improving the structural stability of the street lamp pole, simplifying the process, and reducing the cost; through the structural design of the grounding electrode and the grounding electrode protection cap, the power supply safety of street lamp use and maintenance is improved, and the occurrence of damage is reduced; using the original road surface milling material for street lamp foundation construction is simple in construction, reduces the cost, and reduces the discharge of construction waste, reduces pollution, and protects the environment.

[0049] Application Example

[0050] 1. Basic construction process and quality control:

[0051] 1. Construction process:

[0052] Lamp pole positioning - digging cable trench - digging lamp pole foundation pit - laying wire pipe (cable protection pipe) - pouring street lamp foundation - cable trench backfill - laying cable - street lamp fixture assembly - grounding electrode installation - power on and debugging;

[0053] 2. Trench excavation:

[0054] (1) The buried depth of the wire conduit is 0.5m below the ground.

[0055] (2) Re-measure the axis piles and leveling base point pile lights according to the drawings. If it is found that the markings are insufficient, moved or the accuracy does not meet the requirements, re-measurement shall be carried out.

[0056] 3. Foundation excavation quality control points:

[0057] (1) In foundation pit excavation, the bearing capacity of the foundation is the key to quality control. The bearing capacity of the foundation must meet the design requirements. It is strictly forbidden to disturb the soil at the bottom of the pit to avoid over-excavation. The methods for controlling over-excavation are as follows:

[0058] A. Measure the bottom elevation of the foundation pit in advance and mark the corresponding positions on the steel sheet piles or retaining boards along the route with red paint.

[0059] B. When digging with machinery, when there is still 100mm from the bottom of the foundation pit, use manual digging to level the bottom of the pit; if construction is carried out in the rainy season, leave 200mm of soil and dig it before entering the next process.

[0060] C. The base elevation is measured while excavating. If over-excavation occurs, it is strictly forbidden to backfill with soil. The over-excavated area should be backfilled with crushed stone sand or brick crushed sand and compacted. After the foundation pit is excavated, the quality inspection is carried out. Only after the inspection is qualified can the next construction process be entered. The replaced crushed stone sand and brick crushed sand are compacted with water, and the density is tested by the sand filling method.

[0061] (2) Preventing the collapse of the excavation slope of the foundation pit: When excavating the foundation pit, determine the slope of the excavation slope according to the actual geological conditions on site. After the excavation of the foundation pit, promptly repair the slope and compact it; set up a water interception ditch on the top of the foundation pit slope to intercept and drain surface water to prevent the slope from being eroded; the temporary soil pile on each side of the trench excavation shall comply with the following regulations:

[0062] Do not affect the safety of nearby buildings, pipelines and other facilities; do not bury nearby wellheads and surveying signs, and do not hinder their normal use.

[0063] 4. Backfilling:

[0064] (1) Use the backfill soil that can be backfilled from the trench excavation. Before backfilling, conduct the optimum moisture content tests for various soils to determine the optimum moisture content of each soil.

[0065] (2) Measure the actual moisture content of the soil to be backfilled. Control the moisture content of the soil to be backfilled close to the optimum moisture content. For overly wet soil, sieve it; for overly dry soil, sprinkle water; break up or remove large pieces of soil.

[0066] (3) The backfill soil is backfilled in layers and mechanically compacted, with the layer thickness ≤ 300 mm, and ensure that the compactness meets the design requirements.

[0067] (4) When the backfill soil has different soil qualities, fill it in sections and layers.

[0068] (5) The soil laid every day should be compacted on the same day to prevent the soil layer from being softened by rainwater.

[0069] (6) Construction machinery such as rammers should strictly implement the corresponding safety technical operation procedures, maintenance, and repair procedures for mechanical and electrical equipment.

[0070] (7) Complete the test report.

[0071] (8) For example, when backfilling stone chips, the sand replacement method is used for compaction degree detection, and when backfilling soil, the core cutter method is used for detection. The compaction degree must meet the design requirements.

[0072] II. Foundation engineering construction:

[0073] 1. Street lamp foundation:

[0074] (1) Select concrete plus the milled material of the original road surface as the foundation construction materials. The foundation construction includes: earthwork excavation, materials, tools, pre-embedded pipelines, pre-embedded grounding wires, and anchor bolt pre-embedded parts for foundation construction.

[0075] (2) According to the lamp position mileage on the drawing and combined with the actual situation near the site, determine the street lamp foundation position according to the design requirements, and collect the information on the setting out, elevation, and relevant underground facility pipelines on the roadside.

[0076] (3) Construction process flow:

[0077] Cushion vibration - steel bar forming - formwork erection - pouring concrete and milled material of the original road surface - curing - self-inspection - acceptance.

[0078] (4) Construction method:

[0079] The pouring of the materials for foundation construction is carried out continuously. Calculate the pouring time and pouring range. If there must be an interval, the interval time should be shortened as much as possible (not more than 2 h), and the next layer of materials should be poured before the previous layer of materials sets.

[0080] The vibration duration for each vibration point is such that the surface shows floating mortar and no longer sinks; the moving spacing of the internal vibrator is greater than 1.5 times its action radius, and the distance between the vibrator and the formwork is not greater than 0.5 times its action radius. Also, avoid colliding with steel bars, formwork, etc. It is necessary to insert quickly and extract slowly, go straight up and down, without missing any points, and the lap between the upper and lower layers is not less than 50 mm. For the plate vibrator, the moving spacing ensures that the plate of the vibrator covers the edge of the already vibrated part.

[0081] The base material is covered and watered for curing within 12 hours after masonry. The watering curing time is not less than 7 days, and it remains continuously moist before form removal. The waiting dry period is 10 days before the lamp post installation operation can be carried out.

[0082] Waterproof and anti-corrosion construction is carried out after the form removal of the base. In the construction, layered integral construction is adopted to ensure the compactness, and the surface layer is troweled smooth.

[0083] III. Construction of street lamp handhole wells:

[0084] Level and tamp the ground at the position of the well wall, lay a certain thickness of cement mortar, and take effective measures to protect the embedded conduit from damage, displacement, and blockage of the pipe orifice. The bricks are laid straight. The height of the manhole cover is at the same level as the road shoulder. Set up a fence during the masonry process to prevent unnecessary damage or falling.

[0085] IV. Installation of conduits:

[0086] Connect the pipe ends in sequence according to the pipe specifications in the drawing. The lifting and placing of the pipe must prevent damage, and it is not allowed to drag and throw on the ground. Check the sealing head part when laying the pipe, and it is strictly prohibited to use pipes with potential hazards. Keep the pipe balanced when lowering the pipe into the ditch, and lift and place it gently.

[0087] Grounding: Make a set of grounding electrodes for each loop branch and terminal, and connect all the grounding electrodes into a complete ring-shaped grounding network using galvanized bars.

[0088] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0089] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A street lamp infrastructure, characterized in that: include: A street lamp foundation and a street lamp hand hole well, wherein the street lamp hand hole well is arranged beside the street lamp foundation; Anchor bolt embedded parts are embedded inside the street lamp foundation, and the top of the anchor bolt embedded parts is connected to the street lamp pole; The street lamp pole is provided with a threading tube inside, and the main cable of the street lamp is passed through the threading tube; the threading tube is led out from the inside of the street lamp pole and then embedded in the street lamp base, and the threading tube extends from the street lamp base and is connected to the hand hole well of the street lamp; A grounding electrode is arranged in the hand hole of the street lamp, and the grounding electrode is electrically connected to the grounding wire of the main cable of the street lamp.

2. The street lamp infrastructure according to claim 1, characterized in that: The anchor bolt embedded parts include: a plurality of longitudinal steel bars, a plurality of transverse steel bars, a positioning flange, and a street lamp flange arranged in sequence from bottom to top, the plurality of longitudinal steel bars are evenly arranged 360° along the circumference of the positioning flange, the lower ends of the longitudinal steel bars are bent to form a hook-shaped structure, the plurality of transverse steel bars are fixedly connected between the plurality of longitudinal steel bars; the longitudinal steel bars are fixedly connected to the positioning flange; the street lamp flange is detachably connected to the positioning flange by anchor bolts, and the center of the street lamp flange is fixedly connected to the street lamp pole.

3. The street lamp infrastructure according to claim 2, characterized in that: The longitudinal reinforcement is connected to the positioning flange by welding.

4. The street lamp infrastructure according to claim 2, characterized in that: The angle of the hook-shaped structure formed by bending the lower end of the longitudinal steel bar is 25-35°.

5. The street lamp infrastructure according to claim 2, characterized in that: The number of the longitudinal steel bars is 6.

6. The street lamp infrastructure according to claim 1, characterized in that: The grounding electrode is an angle steel grounding electrode.

7. The street lamp infrastructure according to claim 1, characterized in that: A grounding electrode protection cap is fixedly connected above the grounding electrode.

8. The street lamp infrastructure according to claim 6, characterized in that: The angle steel grounding electrode adopts 50mm*50mm galvanized angle steel, the thickness of the angle steel is 5mm, and the length of the angle steel is 2.5m.

9. The street lamp infrastructure according to claim 2, characterized in that: The diameter of the longitudinal steel bar is φ28mm, the diameter of the transverse steel bar is φ10mm, the outer diameters of the positioning flange and the street lamp flange are both φ500mm, the thickness of the positioning flange is 6mm, the thickness of the street lamp flange is 25mm, the diameter of the anchor bolt is M27mm, the depth of the street lamp foundation is 1.8m below the shoulder, and the joint surface between the positioning flange and the street lamp flange is 100mm away from the top surface of the street lamp foundation.

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