A hidden type well lid for garden ground paving and a construction method thereof

Abstract

The application relates to a hidden well lid for garden ground paving and a construction method thereof, a stainless steel plate cover is arranged on the top of a well lid frame and fixedly connected with the well lid frame, the bottom surface of the stainless steel plate is provided with an adjustable supporting leg assembly, and a positioning convex point is arranged at the center position of each corner intersection of the well lid frame and protrudes downward; an installation hole penetrating through the surface of the frame body is arranged at the center position of each corner intersection, the top end of the adjustable bottom frame supporting leg is inserted into the bottom end of the installation hole, and the upper end of the installation hole is formed with a positioning recess hole for inserting and matching the positioning convex point; the construction process is as follows: installing and leveling the bottom frame - pasting a decorative thin cut surface layer - installing a hanging point screw rod - adjusting the well lid support - assembling the well lid support and the leveling bottom frame; the adjustable supporting leg assembly can vertically penetrate through the leveling bottom frame and is height-adjustable, cooperates with the height adjustment function of the adjustable bottom frame supporting leg, realizes height and levelness adjustment of the hidden well lid, and improves the construction efficiency, construction precision and forming quality.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a concealed manhole cover for garden paving and its construction method. Background Technology

[0002] Currently, concealed decorative manhole covers are widely used in outdoor landscape paving, municipal paving, and building exterior floors to cover underground water supply, drainage, electrical, and pipeline maintenance manholes. While meeting the functions of passage, load-bearing capacity, and maintenance, they also achieve a unified and aesthetically pleasing surface decoration. Existing concealed decorative manhole covers generally adopt a structure of "fixed base frame + cover plate with surface layer." During construction, the manhole is positioned using the base frame, and the decorative surface material is pasted onto the cover plate, ultimately flush with the surrounding paving material, achieving concealed installation.

[0003] Currently, traditional concealed decorative manhole cover technology typically uses standard-thickness materials such as stone or ceramic tiles that match the surrounding ground surface. These materials are generally fixed to the metal cover using a wet-laying process with cement mortar. Leveling and elevation control are achieved through on-site mortar leveling. The cover and base frame are usually simply fitted together, lacking dedicated positioning and self-adjusting mechanisms. This type of technology is simple in structure, highly versatile, and is the standard method for current ground paving manhole cover installation.

[0004] Existing conventional concealed decorative manhole covers and their construction techniques still have many substantial technical defects in practical engineering applications, as follows: 1) The overall weight is too large, resulting in poor convenience for installation and subsequent maintenance. Traditional manhole covers use standard thickness decorative materials combined with a thick layer of cement mortar wet-laying structure. The surface layer has a large additional load, resulting in a high overall weight of the manhole cover. This makes manual handling and alignment difficult, and the labor intensity of construction is high. At the same time, the excessive weight results in high resistance to opening the manhole cover, making it inconvenient to open for later pipeline maintenance and reducing maintenance efficiency.

[0005] 2) Low leveling accuracy and poor controllability of paving quality. Existing technology lacks a mechanical precision leveling structure and relies entirely on manual application of cement mortar to adjust elevation and levelness. The uniformity of mortar thickness is difficult to control, which easily leads to problems such as tilted manhole cover surfaces, height differences with the surrounding ground, and uneven joints. This can easily cause water accumulation on the ground and substandard paving flatness, seriously affecting the overall aesthetics and user experience of the paving.

[0006] 3) Long construction period and low construction efficiency. Traditional wet mortar laying process requires a long mortar curing period, complicated construction procedures and large amount of on-site work. This not only slows down the overall paving project, but also easily generates construction waste on-site. The standardization and precision of construction are low, making it difficult to meet the requirements of high-quality and high-efficiency modern landscaping and municipal paving construction. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a concealed manhole cover for garden paving and its construction method. Its advantages are simple structure, light weight, easy installation and subsequent maintenance, improved construction efficiency, and shortened construction cycle; at the same time, it improves leveling accuracy and construction quality.

[0008] The above-mentioned objective of this invention is achieved through the following technical solution: On one hand, this invention provides a concealed manhole cover for garden paving, comprising a manhole cover base and a leveling bottom frame; the manhole cover base is adapted to the leveling bottom frame, and a decorative thin-cut layer is adhered to the surface of the manhole cover base; the manhole cover base includes a stainless steel plate and a manhole cover frame, the stainless steel plate is placed on top of the manhole cover frame and fixedly connected to the manhole cover frame, and an adjustable support leg assembly with vertically adjustable height is mounted on the bottom surface of the stainless steel plate; the manhole cover frame has a polygonal frame structure, and positioning protrusions are provided at the center of each corner intersection of the manhole cover frame; the leveling bottom frame includes a frame body and multiple adjustable bottom frame legs, the frame body... The structure is a polygonal frame. Each corner intersection of the frame has a through-hole at its center. These holes correspond one-to-one with the adjustable base frame legs. The top of each adjustable base frame leg is inserted into the bottom of the mounting hole. The upper end of each mounting hole forms a positioning recess for the positioning protrusion to be inserted into. The positioning recess corresponds one-to-one with the positioning protrusion. The adjustable leg assembly vertically penetrates the leveling base frame and can be vertically extended and retracted relative to the leveling base frame. The bottom surface of the manhole cover frame is fitted and sealed to the upper end face of the leveling base frame. The positioning protrusion is vertically inserted and limited within the positioning recess, creating a detachable assembly structure where the manhole cover support and the leveling base frame are circumferentially limited and vertically fitted.

[0009] Preferably, the concealed manhole cover for garden paving provided by the present invention includes a manhole cover support platform that further includes multiple ribs. Multiple ribs are arranged horizontally and vertically on the bottom surface of the stainless steel plate to form a reinforcing rib group. The top of each rib is welded and fixed to the bottom surface of the stainless steel plate. The ends of each rib are welded and fixed to the inner side of the manhole cover frame. The adjustable support leg assembly is fixedly installed at the center of the intersection of any two intersecting ribs.

[0010] Preferably, the concealed manhole cover for garden paving provided by the present invention includes an adjustable support leg assembly comprising a manhole cover support leg and an adjusting support leg. A through hole corresponding to the manhole cover support leg is provided on the stainless steel plate, the through hole penetrating the stainless steel plate. The top end of the manhole cover support leg is inserted into and fixed inside the through hole. The manhole cover support leg is a hollow tubular structure with both internal and external threads. The top end of the adjusting support leg is sleeved on the outer peripheral wall of the bottom end of the manhole cover support leg, and the adjusting support leg and the manhole cover support leg are detachably connected and vertically adjustable through a threaded engagement.

[0011] Preferably, the concealed manhole cover for garden paving provided by the present invention further includes a suspension point screw rod on the manhole cover support platform. The suspension point screw rod is correspondingly arranged with the manhole cover support leg. The bottom end of the suspension point screw rod is inserted into the top end of the manhole cover support leg. The suspension point screw rod and the manhole cover support leg are detachably connected by threaded engagement.

[0012] Preferably, the concealed manhole cover for garden paving provided by the present invention has a manhole cover base made of stainless steel.

[0013] Preferably, the concealed manhole cover for garden paving provided by the present invention includes an adjustable bottom frame support leg comprising a support leg body and an adjusting sleeve. The outer peripheral wall of the support leg body is provided with external threads, and the inner peripheral wall of the adjusting sleeve is provided with internal threads. The top end of the support leg body is inserted into the bottom end of the mounting hole, and the top end of the adjusting sleeve is sleeved on the outer peripheral wall of the bottom end of the support leg body. The adjusting sleeve and the support leg body are detachably connected and vertically adjustable through a threaded engagement.

[0014] Preferably, the concealed manhole cover for garden paving provided by the present invention has a leveling bottom frame made of stainless steel.

[0015] Preferably, in the concealed manhole cover for garden paving provided by the present invention, the thickness of the decorative thin-cut surface layer is half the thickness of the surrounding paving surface material.

[0016] On the other hand, the present invention provides a construction method for the concealed manhole cover for garden ground paving as described above, comprising the following steps: The leveling base frame is placed in the pre-reserved manhole cover installation hole on the paved ground. The levelness and installation elevation of the frame are adjusted by the adjustable base frame legs. After leveling, the gap between the bottom of the frame and the original structure ground is filled with cement mortar to complete the fixed installation of the leveling base frame. The decorative thin-cut layer is adhered to the surface of the manhole cover base; Pass the bottom end of the lifting screw through the decorative thin-cut layer and screw it into the top of the manhole cover leg, leaving space for lifting operations; The installation height and level of the stainless steel plate are adjusted by the adjustable outrigger assembly, so that after the manhole cover base is assembled in place, the bottom of the adjustable outrigger assembly is stably supported on the original ground structure. The manhole cover support is further hoisted and aligned using the lifting screw, so that the positioning protrusions on the manhole cover frame are engaged with the positioning recesses of the leveling bottom frame, thus completing the limiting assembly of the manhole cover support and the leveling bottom frame.

[0017] Preferably, the construction method provided by the present invention, wherein the decorative thin-cut layer is adhered to the surface of the manhole cover base, includes: Based on the thickness of the surrounding paving material, a decorative thin-cut surface layer of matching size is prepared through secondary cutting and processing; Select a special adhesive according to the material of the decorative thin-cut surface layer, and fix the decorative thin-cut surface layer to the stainless steel plate surface of the manhole cover base in the center. Control the edge of the decorative thin-cut surface layer to not exceed the manhole cover frame of the manhole cover base, and open the avoidance hole at the position of the decorative thin-cut surface layer corresponding to the manhole cover support leg. Let it stand to cure to complete the fixed assembly of the thin-cut surface layer and the manhole cover base.

[0018] In summary, the beneficial technical effects of this invention are as follows: The beneficial technical effects of the concealed manhole cover for garden paving and its construction method provided in this application are as follows: 1. By engaging the support leg body with the adjusting sleeve thread, the elevation and levelness of the leveling base frame can be adjusted, replacing traditional manual mortar leveling. The elevation and levelness errors are controllable, effectively solving problems such as manhole cover height difference, settlement, edge warping, water accumulation, and abnormal noise when stepped on. The construction standardization is high. In addition, the use of micro-expansion mortar for fixing ensures the stability of the leveling base frame foundation; 2. By adopting a semi-thick decorative thin-cut surface layer and eliminating the need for traditional wet mortar... 1. The layering process, using dry bonding, significantly reduces the overall weight of the manhole cover; 2. The bottom of the stainless steel plate is fully welded with cross-shaped ribs to form a rigid load-bearing system, compensating for the strength shortcomings of the thin plate and improving the overall compressive and deformation resistance; 3. By setting matching positioning protrusions and positioning recesses, the manhole cover support and leveling bottom frame are precisely aligned and locked, completely eliminating relative displacement after assembly; 4. By setting manhole cover support legs with internal and external threads to match lifting point screws and adjusting support legs, the installation and leveling support requirements are met, and the manhole cover can be quickly lifted and opened later, reducing the difficulty of operation and maintenance. Attached Figure Description

[0019] Figure 1 This is an exploded view of a concealed manhole cover for garden paving provided in an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the manhole cover support in the concealed manhole cover for garden paving provided in an embodiment of the present invention. Figure 1 .

[0021] Figure 3This is a schematic diagram of the structure of the manhole cover support in the concealed manhole cover for garden paving provided in an embodiment of the present invention. Figure 2 .

[0022] Figure 4 This is a schematic diagram of the structure of the leveling bottom frame in the concealed manhole cover for garden paving provided in this embodiment of the invention. Figure 1 .

[0023] Figure 5 This is a schematic diagram of the structure of the leveling bottom frame in the concealed manhole cover for garden paving provided in this embodiment of the invention. Figure 2 .

[0024] Figure 6 This is a flowchart of a construction method for a concealed manhole cover for garden paving provided in another embodiment of the present invention.

[0025] In the diagram, 1. Concealed manhole cover; 10. Manhole cover support; 11. Stainless steel plate; 12. Manhole cover frame; 121. Positioning protrusion; 13. Adjustable support leg assembly; 131. Manhole cover support leg; 132. Adjustable support leg; 14. Rib plate; 15. Suspension point screw rod; 20. Leveling bottom frame; 21. Frame body; 211. Positioning recess; 22. Adjustable bottom frame support leg; 221. Support leg body; 222. Adjusting sleeve; 30. Decorative thin-cut surface layer. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] Reference Figure 1This invention discloses a concealed manhole cover 1 for garden paving, comprising a manhole cover base 10 and a leveling bottom frame 20; the manhole cover base 10 and the leveling bottom frame 20 are adapted to each other, and a decorative thin-cut layer 30 is bonded to the surface of the manhole cover base 10; the manhole cover base 10 includes a stainless steel plate 11 and a manhole cover frame 12, the stainless steel plate 11 is placed on top of the manhole cover frame 12 and fixedly connected to the manhole cover frame 12, and an adjustable support leg assembly 13 with vertically adjustable height is installed on the bottom surface of the stainless steel plate 11; the manhole cover frame 12 has a polygonal frame structure 21, and the center positions of each corner intersection of the manhole cover frame 12 are all oriented towards The lower part is provided with positioning protrusions 121; the leveling bottom frame 20 includes a frame body 21 and multiple adjustable bottom frame legs 22. The frame body 21 has a polygonal frame structure. Each corner intersection of the frame body 21 has a through-hole at its center. The mounting holes correspond one-to-one with the adjustable bottom frame legs 22. The top of the adjustable bottom frame legs 22 is inserted into the bottom of the mounting hole. The upper end of the mounting hole forms a positioning recess 211 for the positioning protrusions 121 to be inserted and fitted. The positioning recess 211 corresponds one-to-one with the positioning protrusions 121. The adjustable leg assembly 13 vertically penetrates the leveling bottom frame 20 and can be positioned relative to it. The leveling base frame 20 is vertically adjustable, and the bottom surface of the manhole cover frame 12 is fitted and sealed to the upper end face of the leveling base frame 20. The positioning protrusion 121 is vertically inserted and limited within the positioning recess 211, so that the manhole cover base 10 and the leveling base frame 20 form a detachable assembly structure with circumferential limitation and vertical fit. By setting the positioning protrusion 121 at the corner of the manhole cover frame 12 and integrally forming the positioning recess 211 at the upper end of the mounting hole of the leveling base frame 20, the concave and convex insertion limiting structure allows the manhole cover base 10 and the leveling base frame 20 to form a detachable assembly structure with circumferential limitation and vertical fit after assembly, effectively preventing manhole cover paving. The design addresses issues such as displacement, misalignment, and uneven gaps caused by external forces and thermal expansion and contraction, significantly improving the overall flatness and landscape consistency of the garden paving surface. Furthermore, by incorporating adjustable support leg components 13 and adjustable bottom frame support legs 22, the adjustable support leg components 13 can vertically penetrate and level the bottom frame 20, and extend and retract to adjust its height. Combined with the elevation adjustment function of the adjustable bottom frame support legs 22, this achieves leveling of the concealed manhole cover 1's elevation and horizontality, eliminating the need for traditional rough leveling methods using artificial mortar. This effectively avoids defects such as height differences, warping, settlement, abnormal noises when stepped on, and water accumulation in the concealed manhole cover 1, improving construction precision and molding quality.

[0028] Specifically, the centerline of the adjustable support leg assembly 13 is parallel to the centerline of the adjustable base frame support leg 22, and both are perpendicular to the ground. For example... Figure 1-3 As shown, in this embodiment, the manhole cover frame 12 has a quadrilateral frame structure 21, the number of adjustable support leg assemblies 13 is 4, and the number of positioning protrusions 121 is 4. Of course, the number of positioning protrusions can also be 2 or 3.

[0029] like Figure 4 and Figure 5As shown, in this embodiment, the frame 21 is a quadrilateral frame structure, the number of adjustable bottom frame legs 22 is 4, and the number of positioning recesses 211 is 4. Of course, the number of positioning recesses can also be 2 or 3.

[0030] It should be noted that the inner diameter of the positioning recess 211 is adapted to the outer diameter of the positioning protrusion 121. The positioning recess 211 and the positioning protrusion 121 are in clearance fit, and the clearance between the two is no more than 0.5mm. The clearance is controlled between 0.3mm and 0.5mm. This setting ensures that the relative displacement is minimized.

[0031] The stainless steel plate 11 and the manhole cover frame 12 can be integrally formed. Of course, the stainless steel plate 11 and the manhole cover frame 12 can also be connected by electric welding.

[0032] During construction, the manhole cover base 10 and the leveling bottom frame 20 adopt a nested alignment assembly structure. The adjustable support leg assembly 13 vertically penetrates the leveling bottom frame 20 and can be vertically extended and retracted relative to the leveling bottom frame 20. The bottom surface of the manhole cover frame 12 at the bottom end of the manhole cover base 10 is fitted and sealed to the upper end face of the frame 21 of the leveling bottom frame 20. The positioning protrusion 121 on the manhole cover frame 12 is vertically inserted and limited in the positioning recess 211 of the leveling bottom frame 20, so that the manhole cover base 10 and the leveling bottom frame 20 form a detachable assembly structure with circumferential limitation and vertical fit.

[0033] Continue to refer to Figures 1 to 3 In this embodiment, the manhole cover support 10 also includes multiple ribs 14. Multiple ribs 14 are arranged horizontally and vertically on the bottom surface of the stainless steel plate 11 to form a reinforcing rib group. The top of each rib 14 is welded and fixed to the bottom surface of the stainless steel plate 11, and the ends of each rib 14 are welded and fixed to the inner side of the manhole cover frame 12. The adjustable support leg assembly 13 is fixedly installed at the center of the intersection of any two intersecting ribs 14. By setting ribs 14, multiple ribs 14 are arranged horizontally and vertically to cover the bottom surface of the stainless steel plate 11, which strengthens the overall rigidity of the stainless steel plate 11, greatly improves the load-bearing capacity on the basis of lightweight, effectively avoids the stainless steel plate 11 from bending, cracking and deformation under pressure, and is suitable for long-term outdoor load environment with a long service life.

[0034] Specifically, the surface of the rib plate 14 is fully welded to the stainless steel plate 11, and the end of the rib plate 14 is fully welded to the inner side of the manhole cover frame 12. For example... Figure 3 As shown, in this embodiment, there are 4 ribs 14. Of course, there can also be 5 or 6 ribs 14.

[0035] Furthermore, in this embodiment, the adjustable support leg assembly 13 includes a manhole cover support leg 131 and an adjusting support leg 132. A through hole corresponding to the manhole cover support leg 131 is provided on the stainless steel plate 11. The through hole passes through the stainless steel plate 11. The top end of the manhole cover support leg 131 is inserted into and fixed inside the through hole. The manhole cover support leg 131 is a hollow tubular structure with both internal and external threads. The top end of the adjusting support leg 132 is sleeved on the outer peripheral wall of the bottom end of the manhole cover support leg 131. The adjusting support leg 132 and the manhole cover support leg 131 are connected by a threaded engagement to achieve detachable connection and vertical height adjustment. By setting the adjusting support leg 132 and the manhole cover support leg 131 to be threadedly connected, the installation height and levelness of the manhole cover platform 10 can be adjusted by rotating the adjusting support leg 132. This eliminates the traditional rough leveling method using artificial mortar, effectively avoiding defects such as height difference, warping, settlement, abnormal noise when stepped on, and water accumulation in the manhole cover, thus improving construction accuracy.

[0036] Specifically, the center of the intersection of the two intersecting ribs 14 is set one-to-one with the through hole of the stainless steel plate 11, and the top of the manhole cover support leg 131 passes through the intersection of the two intersecting ribs 14 and is inserted and fixed inside the through hole of the stainless steel plate 11.

[0037] Furthermore, in this embodiment, the manhole cover support 10 also includes a lifting screw rod 15, which is correspondingly arranged with the manhole cover support leg 131. The bottom end of the lifting screw rod 15 is inserted into the top end of the manhole cover support leg 131, and the lifting screw rod 15 and the manhole cover support leg 131 are detachably connected by threaded engagement. By providing the lifting screw rod 15, it is convenient to lift the manhole cover support 10.

[0038] like Figure 2 As shown, in this embodiment, there are four suspension point screws 15.

[0039] During construction, the bottom end of the lifting point screw rod 15 is passed through the decorative thin-cut surface layer 30 and screwed into the top of the manhole cover support leg 131, leaving enough space for the lifting operation. After the concealed manhole cover 1 is assembled, the lifting point screw rod 15 is screwed downwards so that the top end of the lifting point screw rod 15 is pressed tightly against the surface of the decorative thin-cut surface layer 30, achieving a flat and neat end face, and improving the overall flatness and aesthetics of the paving.

[0040] The manhole cover base 10 is made of stainless steel.

[0041] Continue to refer to Figure 1 , Figure 4 and Figure 5In this embodiment, the adjustable bottom frame support leg 22 includes a support leg body 221 and an adjusting sleeve 222. The outer peripheral wall of the support leg body 221 is provided with external threads, and the inner peripheral wall of the adjusting sleeve 222 is provided with internal threads. The top end of the support leg body 221 is inserted into the bottom end of the mounting hole, and the top end of the adjusting sleeve 222 is sleeved on the outer peripheral wall of the bottom end of the support leg body 221. The adjusting sleeve 222 and the support leg body 221 are connected by threaded engagement to achieve detachable connection and vertical height adjustment. This setting replaces the traditional manual mortar leveling, and the elevation and levelness errors are controllable. It effectively solves problems such as height difference, settlement, edge warping, water accumulation, and abnormal noise when stepped on in the concealed manhole cover 1, and the construction standardization is high.

[0042] The frame 21 and the leg body 221 can be connected by electric welding or other rigid connection methods.

[0043] Specifically, the internal thread on the inner circumferential wall of the adjusting sleeve 222 is adapted to the external thread on the outer circumferential wall of the outrigger body 221.

[0044] The leveling bottom frame 20 is made of stainless steel.

[0045] During construction, the installation height and levelness of the frame 21 are adjusted by rotating the adjusting sleeve 222.

[0046] Continue to refer to Figure 1 In this embodiment, the thickness of the decorative thin-cut surface layer 30 is half the thickness of the surrounding paving material.

[0047] The decorative thin-cut surface layer 30 is generally completed through secondary processing and cutting. Depending on the different surface materials, the decorative thin-cut surface layer 30 is bonded to the manhole cover base 10 using different processes and adhesives.

[0048] During construction, the decorative thin-cut surface layer 30 is bonded to the surface of the manhole cover base 10. The half-thick decorative thin-cut surface layer 30 is combined with a dry bonding process, eliminating the need for a thick mortar bonding layer. The overall weight of the manhole cover is reduced by more than 40% compared to the traditional structure. With the addition of a special lifting point structure, a single person can complete the opening, disassembly and maintenance of the manhole cover, greatly improving the efficiency of operation and maintenance.

[0049] It should be noted that the edge of the decorative thin-cut layer 30 does not extend beyond the manhole cover frame 12 of the manhole cover base 10.

[0050] Continue to refer to Figure 6 Another embodiment provides a construction method for the concealed manhole cover 1 for garden ground paving as described above, including the following steps: S1. Place the leveling base frame 20 into the manhole cover installation hole reserved in the paved ground. Adjust the level and installation elevation of the frame 21 by adjusting the adjustable base frame support legs 22. After leveling, fill the gap between the bottom of the frame 21 and the original structure ground with cement mortar to complete the fixed installation of the leveling base frame 20. S2. Adhere the decorative thin-cut layer 30 to the surface of the manhole cover base 10; S3. Pass the bottom end of the lifting screw 15 through the decorative thin-cut layer 30 and screw it into the top of the manhole cover support leg 131, leaving space for lifting operation. S4. Adjust the installation height and level of the stainless steel plate 11 by adjusting the adjustable support leg assembly 13 so that after the manhole cover support platform 10 is assembled in place, the bottom of the adjustable support leg assembly 13 is stably supported on the original structure ground. S5. Continue to hoist and align the manhole cover base 10 using the lifting screw 15, so that the positioning protrusion 121 on the manhole cover frame 12 is inserted into the positioning recess 211 of the leveling bottom frame 20, thus completing the limiting assembly of the manhole cover base 10 and the leveling bottom frame 20.

[0051] S1. The leveling base frame 20 is placed in the pre-reserved manhole cover installation hole in the paved ground. The levelness and installation elevation of the frame 21 are adjusted by the adjustable base frame support legs 22. After leveling, the gap between the bottom of the frame 21 and the original structure ground is filled with cement mortar to complete the fixed installation of the leveling base frame 20. This includes: accurately reserving manhole cover installation holes according to the outer contour dimensions of the concealed manhole cover 1 during the construction of the surrounding ground surface layer; placing the leveling base frame 20 in the pre-reserved manhole cover installation hole, rotating the adjusting sleeve 222 on the adjustable base frame support legs 22 to finely adjust the elevation and levelness of the frame 21 so that it is flush with the elevation of the surrounding paved ground; after leveling, filling the gap between the bottom of the frame 21 and the base layer with micro-expansion cement mortar, compacting it, and waiting for the mortar to initially solidify to complete the fixing of the leveling base frame 20.

[0052] Further, in this embodiment, S2, adhering the decorative thin-cut layer 30 to the surface of the manhole cover base 10, includes: S21. Based on the thickness of the surrounding paving material, prepare a decorative thin-cut surface layer 30 with matching dimensions through secondary cutting and processing; S22. Select a special adhesive according to the material of the decorative thin-cut surface layer 30, and fix the decorative thin-cut surface layer 30 to the surface of the stainless steel plate 11 of the manhole cover base 10 in the center. Control the edge of the decorative thin-cut surface layer 30 to not exceed the manhole cover frame 12 of the manhole cover base 10, and open the avoidance hole at the position of the decorative thin-cut surface layer 30 corresponding to the manhole cover support leg 131. Let it stand to cure and complete the fixed assembly of the thin-cut surface layer and the manhole cover base 10.

[0053] Furthermore, in this embodiment, S4, the installation height and level of the stainless steel plate 11 are adjusted by the adjustable support leg assembly 13, so that after the manhole cover support platform 10 is assembled in place, the bottom end of the adjustable support leg assembly 13 is stably supported on the original structure ground. This includes: rotating the adjustable support leg 132 in the adjustable support leg assembly 13, and using the threaded engagement between the adjustable support leg 132 and the manhole cover support leg 131 to achieve vertical telescopic displacement, correspondingly fine-tuning the installation height and level of the stainless steel plate 11 and the overall manhole cover support platform 10; through multi-point synchronous fine-tuning to calibrate the overall level accuracy of the manhole cover support platform 10, so that after the manhole cover support platform 10 is in place, the bottom end of each adjustable support leg 132 is stably pressed against and supported on the original structure ground, forming a multi-point support bearing structure with uniform force, ensuring that the manhole cover support platform 10 is subjected to balanced force and stable support, effectively dispersing the surface load, and avoiding local settlement, depression and deformation in the later stage.

[0054] Further, in this embodiment, S5, the manhole cover support 10 is continuously hoisted and aligned using the lifting screw 15, so that the positioning protrusions 121 on the manhole cover frame 12 are engaged with the positioning recesses 211 of the leveling bottom frame 20, completing the limiting assembly of the manhole cover support 10 and the leveling bottom frame 20. This includes: establishing a force connection with the lifting screw 15 using an external lifting device, hoisting and moving the manhole cover support 10 as a whole using the lifting screw 15, and slowly lowering the manhole cover support 10 vertically to the center of the frame 21 of the leveling bottom frame 20; during the lowering process, the positioning protrusions 121 on the corners of the manhole cover frame 12 are aligned with the center of the frame 21 of the leveling bottom frame 20. The protrusions 121 correspond one-to-one with the positioning recesses 211 of the leveling base frame 20. Automatic alignment and correction are achieved through the guiding fit of the convex and concave structure. After the positioning protrusions 121 are fully inserted into the positioning recesses 211, the circumferential positioning of the manhole cover base 10 and the leveling base frame 20 is achieved by the convex and concave gap fit structure. Combined with the vertical fitting and pressing of the bottom surface of the manhole cover frame 12 and the upper end face of the frame 21, the overall positioning and assembly of the manhole cover base 10 and the leveling base frame 20 is completed. This effectively limits the horizontal sliding and angular displacement of the manhole cover base 10, ensures the accuracy of the assembly position, and ensures that the overall structure is flat, stable, and without misalignment after paving.

[0055] After the concealed manhole cover 1 is assembled and constructed, the suspension point screw 15 is screwed downwards so that the top end of the suspension point screw 15 is pressed tightly against the surface of the decorative thin-cut layer 30, so as to achieve a flat end face and improve the flatness and aesthetics of the overall paving appearance.

[0056] The beneficial technical effects of the concealed manhole cover 1 for garden paving and its construction method provided in this application are as follows: 1. By connecting the support leg body 221 with the adjusting sleeve 222 through threaded engagement, the elevation and levelness of the leveling base frame 20 can be adjusted, replacing traditional manual mortar leveling. The elevation and levelness errors are controllable, effectively solving problems such as manhole cover height difference, settlement, edge warping, water accumulation, and abnormal noise when stepped on. The construction standardization is high. In addition, the use of micro-expansion mortar for fixing ensures the foundation stability of the leveling base frame 20; 2. By using a semi-thick decorative thin-cut surface layer 30 and eliminating the traditional wet mortar layer, a dry bonding process is adopted, greatly improving the efficiency of the manhole cover. 1. The overall weight of the manhole cover is reduced; 2. A rigid load-bearing system is formed by the cross-welded ribs 14 at the bottom of the stainless steel plate 11, which makes up for the strength deficiency of the thin plate and improves the overall pressure resistance and deformation resistance; 3. By setting matching positioning protrusions 121 and positioning recesses 211, the manhole cover support 10 and the leveling bottom frame 20 are accurately aligned and locked, completely eliminating relative displacement after assembly; 4. By setting manhole cover support legs 131 with internal and external threads to match the lifting point screws 15 and adjusting support legs 132, the installation leveling support requirements are met, and the manhole cover can be quickly lifted and opened later, reducing the difficulty of operation and maintenance.

[0057] The concealed manhole cover 1 for garden paving provided by the present invention has the following advantages: the manhole cover has a simple structure, is easy to manufacture, and is easy to install.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A concealed manhole cover for garden paving, characterized in that: Including the manhole cover base and leveling bottom frame; The manhole cover base is adapted to the leveling bottom frame, and a decorative thin-cut layer is bonded to the surface of the manhole cover base; The manhole cover support includes a stainless steel plate and a manhole cover frame. The stainless steel plate is placed on top of the manhole cover frame and is fixedly connected to the manhole cover frame. The bottom surface of the stainless steel plate is equipped with an adjustable support leg assembly that can be vertically adjusted in height. The manhole cover frame has a polygonal frame structure. The center of each corner intersection of the manhole cover frame is provided with a positioning protrusion. The leveling base frame includes a frame body and multiple adjustable base frame legs. The frame body is a polygonal frame structure. Each corner intersection of the frame body has a through-hole at its center. The mounting holes correspond one-to-one with the adjustable base frame legs. The top of each adjustable base frame leg is inserted into the bottom of the mounting hole. The upper end of the mounting hole forms a positioning recess for the positioning protrusion to be inserted and fitted. The positioning recess corresponds one-to-one with the positioning protrusion. The adjustable support leg assembly extends vertically through the leveling base frame and can be vertically extended and retracted relative to the leveling base frame. The bottom surface of the manhole cover frame is fitted and sealed to the upper end face of the leveling base frame. The positioning protrusion is vertically inserted and limited within the positioning recess, so that the manhole cover support and the leveling base frame form a detachable assembly structure with circumferential limitation and vertical fit.

2. The concealed manhole cover for garden paving according to claim 1, characterized in that: The manhole cover support also includes multiple ribs. Multiple ribs are arranged horizontally and vertically on the bottom surface of the stainless steel plate to form a reinforcing rib group. The top of each rib is welded and fixed to the bottom surface of the stainless steel plate. The ends of each rib are welded and fixed to the inner side of the manhole cover frame. The adjustable support leg assembly is fixedly installed at the center of the intersection of any two intersecting ribs.

3. The concealed manhole cover for garden paving according to claim 1, characterized in that: The adjustable support leg assembly includes a manhole cover support leg and an adjustable support leg. A through hole corresponding to the manhole cover support leg is provided on the stainless steel plate. The through hole passes through the stainless steel plate. The top end of the manhole cover support leg is inserted into and fixed inside the through hole. The manhole cover support leg is a hollow tubular structure with both internal and external threads. The top of the adjustable leg is sleeved on the outer peripheral wall of the bottom end of the manhole cover leg, and the adjustable leg and the manhole cover leg are connected by a threaded engagement to achieve detachable connection and vertical height adjustment.

4. The concealed manhole cover for garden paving according to claim 3, characterized in that: The manhole cover support also includes a lifting point screw rod, which is correspondingly arranged with the manhole cover support leg. The bottom end of the lifting point screw rod is inserted into the top end of the manhole cover support leg, and the lifting point screw rod and the manhole cover support leg are detachably connected by threaded engagement.

5. The concealed manhole cover for garden paving according to claim 1, characterized in that: The manhole cover base is made of stainless steel.

6. The concealed manhole cover for garden paving according to claim 1, characterized in that: The adjustable base frame support leg includes a support leg body and an adjusting sleeve. The outer peripheral wall of the support leg body has an external thread, and the inner peripheral wall of the adjusting sleeve has an internal thread. The top end of the support leg body is inserted into the bottom end of the mounting hole, and the top end of the adjusting sleeve is sleeved on the outer peripheral wall of the bottom end of the support leg body. The adjusting sleeve and the support leg body are detachably connected and vertically adjustable through a threaded engagement.

7. The concealed manhole cover for garden paving according to claim 1, characterized in that: The leveling base frame is made of stainless steel.

8. The concealed manhole cover for garden paving according to claim 1, characterized in that: The thickness of the decorative thin-cut surface layer is half the thickness of the surrounding paving material.

9. A construction method for a concealed manhole cover for garden pavement as described in any one of claims 1-8, characterized in that: Includes the following steps: The leveling base frame is placed in the pre-reserved manhole cover installation hole on the paved ground. The levelness and installation elevation of the frame are adjusted by the adjustable base frame legs. After leveling, the gap between the bottom of the frame and the original structure ground is filled with cement mortar to complete the fixed installation of the leveling base frame. The decorative thin-cut layer is adhered to the surface of the manhole cover base; Pass the bottom end of the lifting screw through the decorative thin-cut layer and screw it into the top of the manhole cover leg, leaving space for lifting operations; The installation height and level of the stainless steel plate are adjusted by the adjustable outrigger assembly, so that after the manhole cover base is assembled in place, the bottom of the adjustable outrigger assembly is stably supported on the original ground structure. The manhole cover support is further hoisted and aligned using the lifting screw, so that the positioning protrusions on the manhole cover frame are engaged with the positioning recesses of the leveling bottom frame, thus completing the limiting assembly of the manhole cover support and the leveling bottom frame.

10. The construction method according to claim 9, characterized in that: The process of bonding the decorative thin-cut layer to the surface of the manhole cover base includes: Based on the thickness of the surrounding paving material, a decorative thin-cut surface layer of matching size is prepared through secondary cutting and processing; Select a special adhesive according to the material of the decorative thin-cut surface layer, and fix the decorative thin-cut surface layer to the stainless steel plate surface of the manhole cover base in the center. Control the edge of the decorative thin-cut surface layer to not exceed the manhole cover frame of the manhole cover base, and open the avoidance hole at the position of the decorative thin-cut surface layer corresponding to the manhole cover support leg. Let it stand to cure to complete the fixed assembly of the thin-cut surface layer and the manhole cover base.

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