Integral well seat well cover structure

Abstract

The utility model discloses an integrated well seat well lid structure, it includes: ring type well seat, it sets up on well shaft upper portion, and the upper edge of ring type well seat inner wall is inwards recessed and forms two half ring type ramps, and the slope of half ring type ramp is inclined upward, first adjusting cylinder, its outer diameter is matched with the inner diameter of ring type well seat, and first adjusting cylinder cooperations is set up in ring type well seat and stretches into well shaft inside, and the outer wall of first adjusting cylinder is fixed with two adjusting blocks, and adjusting block and half ring type ramp one to one corresponding setting, and the bottom surface shape of adjusting block is compatible with the slope of half ring type ramp, and adjusting block is supported by half ring type ramp, well lid, it is fixedly installed in the upper portion of first adjusting cylinder, cast-in-situ concrete body, it is casted and shaped in the outside of first adjusting cylinder, and is filled in the clearance between first adjusting cylinder and ring type well seat, and this structure can effectively adapt to the requirement of different road surface elevation and construction error, and the structure system is solid and reliable.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover construction. More specifically, this utility model relates to an integrated manhole cover and frame structure. Background Technology

[0002] Currently, traditional split-type manhole cover and frame structures are widely used in urban roads and municipal engineering projects. These structures typically consist of a concrete manhole base, a manhole cover frame, and the manhole cover itself. Installation requires on-site layer-by-layer formwork erection, concrete pouring, and adjustment of the manhole cover elevation, resulting in complex and inefficient construction procedures. Because the connections between the manhole base and the manhole casing, and between the manhole cover frame and the manhole base, are often rigid or simply overlapped, under long-term vehicle loads and environmental settlement, problems such as cracking of the pavement around the manhole, loosening of the manhole cover frame, and overall settlement or bulging of the manhole body are highly likely to occur. This not only affects driving comfort and safety but also increases subsequent maintenance costs.

[0003] Furthermore, traditional manhole cover structures are difficult to adjust in elevation, making it hard to adapt to minor changes in road surface elevation, and installation accuracy is difficult to control. In terms of waterproofing, groundwater often seeps in at the joint between the manhole cover and the manhole casing due to inadequate sealing, affecting the safety of the facilities inside. At the same time, the overall rigidity and strength of existing structures are often insufficient, and the reinforcement configuration lacks systematic design, making it difficult to form an effective overall load-bearing structure with the surrounding road surface, further exacerbating the risk of localized damage.

[0004] Therefore, there is an urgent need for an integrated manhole cover and frame structure that is easy to construct, highly adjustable, reliably sealed, and structurally robust, in order to overcome the shortcomings of existing technologies. Utility Model Content

[0005] One objective of this invention is to provide an integrated manhole cover and frame structure that allows for convenient adjustment of minor changes in the manhole cover's position, and features convenient construction, good adjustability, reliable sealing, and strong overall structural integrity.

[0006] To achieve these objectives and other advantages of this utility model, according to one aspect of this utility model, an integrated manhole cover and frame structure is provided, installed on the upper part of a manhole, comprising: an annular manhole base disposed on the upper part of the manhole, the annular manhole base having an annular structure, the upper edge of its inner wall being recessed inward to form two semi-annular ramps, the slopes of the semi-annular ramps being inclined upwards; a first adjusting cylinder having an outer diameter matching the inner diameter of the annular manhole base, the first adjusting cylinder fittingly passing through the annular manhole base and extending into the interior of the manhole, two adjusting blocks fixedly provided on the outer wall of the first adjusting cylinder, the adjusting blocks being correspondingly arranged one-to-one with the semi-annular ramps, and the bottom shape of the adjusting blocks being adapted to the slope of the semi-annular ramps, the adjusting blocks being supported by the semi-annular ramps; a manhole cover fixedly installed on the upper part of the first adjusting cylinder; and a cast-in-place concrete body cast and formed on the outside of the first adjusting cylinder, filling the gap between the first adjusting cylinder and the annular manhole base.

[0007] Preferably, the surface of the semi-circular ramp is roughened, and the bottom surface of the adjusting block is provided with a rubber layer.

[0008] Preferably, an expansion sealing strip is provided on the lower edge of the inner wall of the annular well base. The expansion sealing strip is squeezed by the outer wall of the first adjusting cylinder to seal the joint between the inner wall of the annular well base and the outer wall of the first adjusting cylinder.

[0009] Preferably, it further includes at least one second adjusting cylinder disposed between the manhole cover and the first adjusting cylinder.

[0010] Preferably, the upper end of the first adjusting cylinder is provided with a first flange ring, and the upper and lower ends of the second adjusting cylinder are respectively provided with second flange rings. The first adjusting cylinder and the second adjusting cylinder above it are fixedly connected by the first flange ring and the second flange ring, and the manhole cover frame is fixedly connected to the second flange ring of the second adjusting cylinder below it.

[0011] Preferably, an annular rubber gasket is provided between the second flange ring and the connected first flange ring or second flange ring or manhole cover frame.

[0012] Preferably, the manhole cover frame, the second flange ring, and the first flange ring are respectively provided with a plurality of circumferentially arranged manhole cover through holes, second through holes, and first through holes. The manhole cover through holes, second through holes, and first through holes correspond one to one and are all provided with a first longitudinal steel bar. The upper and lower ends of the first longitudinal steel bar are respectively anchored to the manhole cover frame and the first flange ring by bolts.

[0013] Preferably, multiple embedded sleeves are pre-embedded in the annular well base. The multiple embedded sleeves are arranged in a circumferential direction with their openings facing upwards. Multiple second longitudinal steel bars are threaded into the embedded sleeves. Multiple first longitudinal steel bars are tied with multiple circumferential steel bars to form an inner steel cage. Multiple second longitudinal steel bars are tied with multiple circumferential steel bars to form an outer steel cage. Multiple tie bars are tied between the inner steel cage and the outer steel cage.

[0014] Preferably, the number of the first longitudinal steel bar and the second longitudinal steel bar is not less than six.

[0015] Preferably, the outer wall of the annular well base has several circumferential reinforcing bars extending outwards.

[0016] This utility model has at least the following beneficial effects: First, by rotating the outer wall of the first adjusting cylinder, the adjusting block on it can cooperate with the semi-circular ramp on the inner wall of the annular manhole seat, thereby achieving stepless adjustment of the manhole cover height. The adjusting block can move along the slope of the ramp, precisely controlling the vertical position of the first adjusting cylinder and the manhole cover installed on it. In addition, by adding second adjusting cylinders of different specifications, the height adjustment range can be further expanded, effectively adapting to the requirements of different road surface elevations and construction errors, and ensuring that the final elevation of the manhole cover matches the surrounding road surface. Secondly, the on-site installation process of this utility model is clear and simple. The annular manhole base and the first adjusting cylinder are prefabricated components that can be quickly positioned and assembled, greatly reducing on-site formwork and complex adjustment work. Through the threaded connection between the pre-embedded sleeve and the second longitudinal steel bar, as well as the binding of the first longitudinal steel bar, the circumferential steel bar and the tie steel bar, a stable double-layer steel cage structure can be quickly formed. Finally, the concrete is poured as a whole, so that the manhole base, the adjusting cylinder and the surrounding road surface are firmly combined into a whole. This not only has high construction efficiency, but also effectively ensures the consistency and reliability of project quality.

[0017] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one technical solution of this utility model; Figure 2 This is a schematic diagram of the height adjustment of the first adjusting cylinder in one technical solution of this utility model; Figure 3 This is a schematic diagram of a ring-shaped well base in one technical solution of this utility model; Figure 4 This is a schematic diagram of the first adjusting cylinder in one technical solution of this utility model; Figure 5This is a schematic diagram of the overall structure assembly in one technical solution of this utility model; Figure 6 This is a schematic diagram of the installation of the first longitudinal steel bar and the second longitudinal steel bar in one technical solution of this utility model; Figure 7 This is a schematic diagram of the inner and outer reinforcing cages in one technical solution of this utility model; Figure 8 This is a cross-sectional schematic diagram of one technical solution of this utility model.

[0019] Reference numerals in the attached drawings: 1-ring-shaped manhole base, 11-semi-ring-shaped ramp, 12-expansion waterstop strip, 13-embedded sleeve, 14-peripheral reinforcement, 2-first adjusting cylinder, 21-adjusting block, 22-first flange ring, 23-first through hole, 3-ring-shaped rubber gasket, 4-second adjusting cylinder, 41-second flange ring, 42-second through hole, 5-manhole cover, 50-manhole cover frame, 51-manhole cover through hole, 6-first longitudinal reinforcement, 7-second longitudinal reinforcement, 8-circumferential reinforcement, 9-tie reinforcement, 10-cast-in-place concrete, 100-asphalt layer, 101-manhole cylinder. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0021] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0022] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the components described are commercially available unless otherwise specified. In the description of this utility model, it should be noted that, unless otherwise explicitly stated and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] like Figures 1-8As shown, the technical solution of this application provides an integrated manhole cover and frame structure, installed on the upper part of the manhole casing 101, including: an annular manhole base 1, which is disposed on the upper part of the manhole casing 101. The annular manhole base 1 has an annular structure, and the upper edge of its inner wall is recessed inward to form two semi-annular ramps 11, the slope of the semi-annular ramps 11 being inclined upward; a first adjusting cylinder 2, the outer diameter of which matches the inner diameter of the annular manhole base 1. The first adjusting cylinder 2 is fitted into the annular manhole base 1 and extends into the interior of the manhole casing 101. Two adjusting blocks 21 are fixedly provided on the outer wall of the first adjusting cylinder 2. The adjusting blocks 21 are arranged one-to-one with the semi-circular ramp 11, and the bottom shape of the adjusting blocks 21 is adapted to the slope of the semi-circular ramp 11. The adjusting blocks 21 are supported by the semi-circular ramp 11. The manhole cover 5 is fixedly installed on the upper part of the first adjusting cylinder 2. The cast-in-place concrete body 10 is cast on the outside of the first adjusting cylinder 2 and fills the gap between the first adjusting cylinder 2 and the annular manhole base 1. The main components of this structure, such as the annular manhole base 1, the first adjusting cylinder 2 and the second adjusting cylinder 4, are all produced by factory prefabrication. The annular manhole base 1 is formed by concrete casting in one piece. The semi-circular ramp 11 inside is formed directly in the mold. The cylinder body of the first adjusting cylinder 2 is manufactured by rolling welding or molding process. The adjusting blocks 21 on its outer wall are formed by welding or integral casting.

[0024] In this technical solution, by rotating the first adjusting cylinder 2, the two adjusting blocks 21 on its outer wall move synchronously along the inclined surface of the semi-circular ramp 11 on the inner wall of the annular manhole seat 1, thereby driving the entire first adjusting cylinder 2 and the manhole cover 5 installed on it to rise and fall smoothly, realizing stepless fine adjustment of height. The operation is simple and does not require special tools. After the manhole cover 5 is positioned, the cast-in-place concrete body 10 is constructed, and after curing, the asphalt layer 100 is constructed according to the design requirements.

[0025] In another technical solution, the surface of the semi-circular ramp 11 is roughened, and the bottom surface of the adjusting block 21 is provided with a rubber layer. The roughening treatment increases the roughness of the slope surface, while the rubber layer on the bottom surface of the adjusting block 21 provides sufficient friction coefficient and elastic deformation capacity, so that sufficient static friction can be generated between the adjusting block 21 and the semi-circular ramp 11, effectively preventing it from sliding on the semi-circular ramp 11 and ensuring that it can be stably maintained after the position is adjusted.

[0026] In another technical solution, an expansion waterstop strip 12 is provided on the lower edge of the inner wall of the annular well base 1. The expansion waterstop strip 12 is squeezed by the outer wall of the first adjusting cylinder 2 to seal the joint between the inner wall of the annular well base 1 and the outer wall of the first adjusting cylinder 2. When the first adjusting cylinder 2 is installed in place, its outer wall will continuously squeeze the expansion waterstop strip 12. When the cast-in-place concrete body 10 is constructed, the volume of the expansion waterstop strip 12 will expand, thereby filling and sealing the annular joint between the inner wall of the annular well base 1 and the outer wall of the first adjusting cylinder 2 more tightly, preventing concrete slurry from entering the interior of the well cylinder 101.

[0027] In another technical solution, at least one second adjusting cylinder 4 is also included, which is disposed between the manhole cover 5 and the first adjusting cylinder 2. By selecting one or more second adjusting cylinders 4 of specific heights under different conditions, the final installation elevation range of the manhole cover 5 can be greatly expanded to cope with greater changes in road surface design thickness or unforeseen construction errors. The modular design makes the installation process quick and convenient, and flexible configuration can be achieved without replacing the main components, which significantly improves the inclusiveness and economy of this technical solution for different engineering needs.

[0028] In another technical solution, the upper end of the first adjusting cylinder 2 is provided with a first flange ring 22, and the upper and lower ends of the second adjusting cylinder 4 are respectively provided with second flange rings 41. The first adjusting cylinder 2 and the second adjusting cylinder 4 above it are fixedly connected by the first flange ring 22 and the second flange ring 41. The manhole cover frame 50 of the manhole cover 5 is fixedly connected to the second flange ring 41 of the second adjusting cylinder 4 below it. The first adjusting cylinder 2, one or more second adjusting cylinders 4 and the manhole cover frame 50 can be quickly and accurately stacked and fixed, which greatly simplifies the on-site installation process. Construction personnel only need to use bolts to tighten each component, which not only ensures the connection strength, but also allows the height of the entire structure to be flexibly and stepwise coarsely adjusted by increasing or decreasing the number of second adjusting cylinders 4. Together with the first adjusting cylinder 2, it ensures the perfect match between the manhole cover elevation and the road surface design.

[0029] In another technical solution, an annular rubber gasket 3 is provided between the second flange ring 41 and the connected first flange ring 22, second flange ring 41, or manhole cover frame 50. The annular rubber gasket 3 acts as an elastic sealant, effectively filling the microscopic uneven gaps between the flange mating surfaces and forming a reliable sealing barrier. In another technical solution, the manhole cover frame 50, the second flange ring 41, and the first flange ring 22 are respectively provided with multiple circumferentially arranged manhole cover through holes 51, 42, and 23. These through holes 51, 42, and 23 correspond one-to-one and are all connected by a first longitudinal steel bar 6. The upper and lower ends of the first longitudinal steel bar 6 are anchored to the manhole cover frame 50 and the first flange ring 22 respectively by bolts. High-strength bolts are also used to anchor the manhole cover 5, the second adjusting cylinder 4, and the first adjusting cylinder 2 together to form a complete rigid load-bearing frame. This design upgrades the traditional simple mechanical connection to a composite connection system based on prestressed steel bars, greatly enhancing the integrity and fatigue resistance of the manhole cover structure under vehicle cyclic loads. The first longitudinal steel bar 6 not only bears the main tensile stress but also works in conjunction with the subsequently poured concrete, significantly improving the structure's overall impact resistance and anti-settlement capabilities.

[0030] In another technical solution, multiple embedded sleeves 13 are pre-embedded within the annular well base 1. These sleeves 13 are arranged circumferentially with their openings facing upwards. Multiple second longitudinal reinforcing bars 7 are threaded into each embedded sleeve 13. Multiple first longitudinal reinforcing bars 6 are bound with multiple circumferential reinforcing bars 8 to form an inner reinforcing cage. Multiple second longitudinal reinforcing bars 7 are bound with multiple circumferential reinforcing bars 8 to form an outer reinforcing cage. Multiple tie bars 9 are bound between the inner and outer reinforcing cages. The multiple first longitudinal reinforcing bars 6 are bound together with the circumferential reinforcing bars 8 to form the inner reinforcing cage, and the multiple second longitudinal reinforcing bars 7 are bound together to form the outer reinforcing cage. To further enhance the overall integrity, multiple tie bars 9 are also bound between the inner and outer reinforcing cages. This structure forms a three-dimensional, high-strength, large-scale reinforcing cage skeleton system. The frame integrates the ring-shaped manhole base 1, the cast-in-place concrete body 10, and the manhole cover load-bearing frame connected by the first longitudinal steel bars 6 into one whole, ensuring that the load can be effectively distributed from the manhole cover to the surrounding road structure, greatly improving the durability of the road surface around the manhole, and effectively avoiding common problems such as cracking and settlement around the manhole.

[0031] In another technical solution, the number of the first longitudinal steel bar 6 and the second longitudinal steel bar 7 is not less than six. The configuration of not less than six bars provides sufficient circumferential restraint and axial reinforcement for the cast-in-place concrete body 10, so that the entire manhole base structure can evenly distribute and bear vehicle loads from all directions, effectively preventing local stress concentration or concrete cracking that may be caused by insufficient reinforcement, and significantly improving the overall load-bearing capacity and long-term durability of the structure.

[0032] In another technical solution, the outer wall of the annular manhole cover 1 has several peripheral reinforcing bars 14 extending outwards, which will be tightly bonded to the reinforcing mesh or concrete in the road base or surface layer. This design greatly enhances the mechanical interlocking and tensile force transmission between the annular manhole cover 1 and the surrounding road structure, firmly "anchoring" the manhole cover to the road, thereby effectively eliminating the weak points caused by material differences and sudden changes in stiffness at the junction of the manhole cover and the road surface, and fundamentally suppressing the occurrence of common defects such as cracking, subsidence, or bulging of the road surface around the manhole.

[0033] The number of components and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0034] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An integrated manhole cover and frame structure, installed on the upper part of the manhole casing (101), characterized in that, include: A ring-shaped well seat (1) is provided on the upper part of the well cylinder (101). The ring-shaped well seat (1) has a ring structure. The upper edge of its inner wall is recessed inward to form two semi-ring-shaped ramps (11). The slope of the semi-ring-shaped ramps (11) is inclined upward. The first adjusting cylinder (2) has an outer diameter that matches the inner diameter of the annular well seat (1). The first adjusting cylinder (2) is fitted into the annular well seat (1) and extends into the well cylinder (101). Two adjusting blocks (21) are fixedly provided on the outer wall of the first adjusting cylinder (2). The adjusting blocks (21) are correspondingly provided with the semi-annular ramp (11), and the bottom shape of the adjusting block (21) is adapted to the slope of the semi-annular ramp (11). The adjusting block (21) is supported by the semi-annular ramp (11). The manhole cover (5) is fixedly installed on the upper part of the first adjusting cylinder (2); The cast-in-place concrete body (10) is cast on the outside of the first regulating cylinder (2) and fills the gap between the first regulating cylinder (2) and the annular well seat (1).

2. The integrated manhole cover and frame structure as described in claim 1, characterized in that, The surface of the semi-circular ramp (11) is roughened, and the bottom surface of the adjusting block (21) is provided with a rubber layer.

3. The integrated manhole cover and frame structure as described in claim 1, characterized in that, An expansion sealing strip (12) is provided on the lower edge of the inner wall of the annular well base (1). The expansion sealing strip (12) is squeezed by the outer wall of the first adjusting cylinder (2) to seal the joint between the inner wall of the annular well base (1) and the outer wall of the first adjusting cylinder (2).

4. The integrated manhole cover and frame structure as described in claim 1, characterized in that, It also includes at least one second regulating cylinder (4), which is disposed between the manhole cover (5) and the first regulating cylinder (2).

5. The integrated manhole cover and frame structure as described in claim 4, characterized in that, The first adjusting cylinder (2) is provided with a first flange ring (22) at its upper end, and the second adjusting cylinder (4) is provided with a second flange ring (41) at its upper and lower ends respectively. The first adjusting cylinder (2) and the second adjusting cylinder (4) above it are fixedly connected by the first flange ring (22) and the second flange ring (41). The manhole cover frame (50) of the manhole cover (5) is fixedly connected to the second flange ring (41) of the second adjusting cylinder (4) below it.

6. The integrated manhole cover and frame structure as described in claim 5, characterized in that, A ring-shaped rubber pad (3) is provided between the second flange ring (41) and the connected first flange ring (22) or second flange ring (41) or manhole cover frame (50).

7. The integrated manhole cover and frame structure as described in claim 5, characterized in that, The manhole cover frame (50), the second flange ring (41), and the first flange ring (22) are respectively provided with a plurality of circumferentially arranged manhole cover through holes (51), second through holes (42), and first through holes (23). The manhole cover through holes (51), second through holes (42), and first through holes (23) correspond one to one and are all provided with a first longitudinal steel bar (6). The upper and lower ends of the first longitudinal steel bar (6) are respectively anchored to the manhole cover frame (50) and the first flange ring (22) by bolts.

8. The integrated manhole cover and frame structure as described in claim 7, characterized in that, The annular well base (1) is pre-embedded with multiple pre-embedded sleeves (13). The multiple pre-embedded sleeves (13) are arranged in the circumferential direction with the opening facing upward. Multiple second longitudinal steel bars (7) are threaded into the pre-embedded sleeves (13). Multiple first longitudinal steel bars (6) are tied with multiple circumferential steel bars (8) to form an inner steel cage. Multiple second longitudinal steel bars (7) are tied with multiple circumferential steel bars (8) to form an outer steel cage. Multiple tie bars (9) are tied between the inner steel cage and the outer steel cage.

9. The integrated manhole cover and frame structure as described in claim 8, characterized in that, The number of the first longitudinal steel bar (6) and the second longitudinal steel bar (7) is not less than six.

10. The integrated manhole cover and frame structure as described in claim 8, characterized in that, The outer wall of the annular well base (1) has several peripheral steel bars (14) extending outwards.

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