manhole

Abstract

The application belongs to the technical field of civil engineering and specifically relates to an inspection well. The inspection well comprises a well shaft, a concrete cushion layer surrounding the well shaft, a steel cylinder arranged on the well shaft, a concrete unloading platform surrounding the steel cylinder and arranged on the well shaft and the concrete cushion layer, a steel unloading plate embedded in the concrete unloading platform, a well cover embedded in the steel unloading plate and arranged on the concrete unloading platform, and a plurality of reinforcing ribs connected with the outer wall of the steel cylinder and the steel unloading plate, the plurality of reinforcing ribs being embedded in the concrete unloading platform, wherein the well cover is arranged on the plurality of reinforcing ribs. The inspection well can guarantee the service life.

Description

Technical Field

[0001] This application belongs to the field of civil engineering technology, specifically relating to a manhole. Background Technology

[0002] With the rapid development of the transportation industry, heavy-duty vehicles (such as heavy trucks and transport vehicles) place extremely high demands on the load-bearing capacity of roads and their ancillary facilities. Various manholes under the road (such as rainwater manholes, sewage manholes, power manholes, and communication manholes) are essential facilities, and their manhole opening areas are often the weakest points in the road structure.

[0003] In related technologies, manholes are highly susceptible to a series of problems under repeated heavy vehicle loads, including manhole cover subsidence, manhole ring loosening and breakage, uneven settlement of the roadbed around the manhole, and collapse of the manhole itself. These problems not only seriously affect the driving safety and comfort of the road, but also greatly increase the cost and difficulty of subsequent maintenance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a manhole that aims to at least partially resolve a series of issues that arise under repeated heavy vehicle loads, such as manhole cover subsidence, manhole ring loosening and breakage, uneven settlement of the roadbed around the manhole, and manhole collapse itself.

[0005] The technical solution of this invention is as follows: An inspection well includes: a well shaft; a concrete foundation surrounding the well shaft; a steel cylinder disposed on the well shaft; a concrete unloading platform surrounding the steel cylinder and disposed on the well shaft and the concrete foundation; a steel unloading plate embedded in the concrete unloading platform; a well cover embedded in the steel unloading plate and disposed on the concrete unloading platform; and a plurality of reinforcing ribs connected to the outer wall of the steel cylinder and connected to the steel unloading plate, wherein the well cover is disposed on the plurality of reinforcing ribs.

[0006] In some implementations, the multiple reinforcing ribs are evenly spaced at equal angles.

[0007] In some implementations, the concrete unloading platform has a plurality of first mounting slots, each of which corresponds to a plurality of reinforcing ribs, and the reinforcing ribs are embedded in the corresponding first mounting slots.

[0008] In some implementations, the width of the reinforcing rib matches the width of the first mounting groove, and the height of the reinforcing rib matches the depth of the first mounting groove.

[0009] In some implementations, the steel unloading plate has a second mounting groove, and the manhole cover is embedded in the second mounting groove.

[0010] In some embodiments, the projections of the plurality of reinforcing ribs along the axial direction of the steel cylinder at least partially fall within the first mounting groove.

[0011] In some implementations, the area of ​​the manhole cover matches the area of ​​the second mounting slot.

[0012] In some implementations, the concrete unloading platform has a third mounting groove in which the steel unloading plate is embedded.

[0013] In some implementations, the area of ​​the steel unloading plate matches the area of ​​the third mounting groove.

[0014] In some implementations, the concrete unloading platform is flush with the end face of the manhole shaft, the steel unloading plate is flush with the end face of the manhole shaft, and the manhole cover is flush with the end face of the manhole shaft.

[0015] The beneficial effects of the present invention include at least the following: Because the concrete subbase surrounds the manhole casing, the steel cylinder is placed on top of the manhole casing, the concrete unloading platform surrounds the steel cylinder and is placed on both the manhole casing and the concrete subbase, the steel unloading plate is embedded within the concrete unloading platform, the manhole cover is embedded within the steel unloading plate and placed on the concrete unloading platform, and multiple reinforcing ribs are connected to the outer wall of the steel cylinder and to the steel unloading plate, and embedded within the concrete unloading platform, with the manhole cover placed on these reinforcing ribs, the steel unloading plate, steel cylinder, concrete unloading platform, and multiple reinforcing ribs constitute a rigid whole. When the wheels of heavy vehicles pass over the manhole cover, the load of the heavy vehicles is transferred to the rigid whole, which can bear the weight. Moreover, the rigid whole can effectively distribute the concentrated wheel pressure load of heavy vehicles into a surface load, and then transfer the surface load to the concrete subbase through the concrete unloading platform, thereby increasing the load-bearing capacity of the concrete subbase. The cross-section of the manhole further disperses the surface load, effectively spreading it. The load is transferred to the roadbed through the concrete cushion layer, avoiding stress concentration around the manhole and reducing the possibility of roadbed settlement around the manhole and the possibility of the manhole cover sinking relative to the road surface. The rigid integral structure increases the support area, reducing the possibility of fatigue fracture of the manhole ring. Moreover, the rigid integral structure, as a load transfer and transition structure, makes the load transfer path continuous and smooth, efficiently converting it into a surface load and spreading it to a wider area of ​​the roadbed. This avoids the load being directly borne by the relatively weak manhole, reducing the vertical pressure and bending moment borne by the manhole, reducing the direct impact of heavy vehicle loads on the manhole, decoupling the manhole from the dynamic load of the road surface, reducing the possibility of manhole collapse, ensuring service life, ensuring road driving safety and comfort, and reducing the cost and difficulty of later maintenance.

[0016] Because multiple reinforcing ribs are connected to the steel unloading plate and embedded in the concrete unloading platform, and the manhole cover is placed on the multiple reinforcing ribs, the cooperation between the reinforcing ribs and the concrete unloading platform forms the ability to resist movement and rotation, thereby limiting the position of the steel unloading plate and ensuring the stability of the unloading plate under load.

[0017] Because the manhole cover is mounted on a concrete unloading platform and multiple reinforcing ribs, it can ensure that the concentrated wheel load of heavy vehicles can be fully transferred to the concrete unloading platform and multiple reinforcing ribs, thus achieving load transfer and ensuring the stability of the manhole cover installation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 These are schematic diagrams of the manhole structures in some embodiments; Figure 2 for Figure 1 Top view of the inspection well; Figure 3 for Figure 1 A schematic diagram of the layout of manhole covers for inspection wells.

[0020] In the attached image: 10 shaft; 20 concrete foundation; 30 steel cylinder; 40 concrete unloading platform; 50 steel unloading plate; 60 manhole cover; 70 reinforcing ribs. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0025] Road inspection wells are typically constructed by pre-embedding a concrete well casing in the roadbed, installing a cast iron well cover and frame on top of the casing, and backfilling the area around the casing with plain soil or low-strength material. This type of inspection well structure has the following significant drawbacks: First, the stiffness and density of the manhole casing and its surrounding backfill material differ significantly from those of the rigorously compacted roadbed material, creating a typical abrupt "rigid-flexible" interface. When heavy vehicles pass over it, the enormous concentrated wheel pressure acts directly on the manhole cover and is transmitted through the manhole ring to the relatively weaker manhole casing and backfill area, unlike a homogeneous roadbed which can effectively distribute the load. This leads to stress concentration around the manhole, causing the backfill material to be rapidly compressed, which in turn causes the manhole cover to subside relative to the road surface.

[0026] Secondly, well rings are usually placed directly on the well casing, and their supporting area is limited. Under repeated heavy loads and impacts, concrete well rings are prone to fatigue fracture.

[0027] Furthermore, the lack of an effective load transfer and transition structure between the manhole and the roadbed prevents the vehicle load from being smoothly transferred from the manhole cover to the solid roadbed at a distance. This causes the manhole to bear excessive vertical pressure and bending moment, which may lead to structural damage or even collapse of the manhole under long-term action.

[0028] Based on these technical problems, this application provides a manhole that aims to solve a series of technical problems such as manhole cover sinking, manhole ring loosening and breaking, uneven settlement of the roadbed around the manhole, and manhole collapse itself under repeated heavy vehicle load impacts.

[0029] The design concept of this application is to form a rigid whole by using a steel unloading plate, a steel cylinder, a concrete unloading platform and multiple reinforcing ribs. The rigid whole serves as a load transfer and transition structure, making the load transfer path continuous and smooth, thereby achieving the technical effect of ensuring service life.

[0030] Specific technical solutions will now be described in detail with reference to the accompanying drawings, which are not necessarily drawn to scale. Similar or identical reference numerals may be used to designate the same or similar parts in different figures. The use of similar or identical reference numerals in different figures does not mean that all figures including similar or identical reference numerals constitute a single or the same embodiment. The accompanying drawings illustrate the various embodiments discussed in this application in a generalized, illustrative, and not restrictive manner.

[0031] Combination Figure 1 , Figure 2 and Figure 3The manhole in this embodiment includes: a manhole casing 10, a concrete base layer 20, a steel cylinder 30, a concrete unloading platform 40, a steel unloading plate 50, a manhole cover 60, and multiple reinforcing ribs 70. The concrete base layer 20 surrounds the manhole casing 10. The steel cylinder 30 is disposed on the manhole casing 10. The concrete unloading platform 40 surrounds the steel cylinder 30 and is disposed on both the manhole casing 10 and the concrete base layer 20. The steel unloading plate 50 is embedded within the concrete unloading platform 40. The manhole cover 60 is embedded within the steel unloading plate 50 and is disposed on the concrete unloading platform 40. Multiple reinforcing ribs 70 are connected to the outer wall of the steel cylinder 30 and to the steel unloading plate 50, and are embedded within the concrete unloading platform 40. The manhole cover 60 is disposed on the multiple reinforcing ribs 70.

[0032] Because the concrete cushion layer 20 is surrounding the manhole 10, the steel cylinder 30 is placed on the manhole 10, the concrete unloading platform 40 is surrounding the steel cylinder 30 and placed on the manhole 10 and the concrete cushion layer 20, the steel unloading plate 50 is embedded in the concrete unloading platform 40, the manhole cover 60 is embedded in the steel unloading plate 50 and placed on the concrete unloading platform 40, multiple reinforcing ribs 70 are connected to the outer wall of the steel cylinder 30 and to the steel unloading plate 50, and multiple reinforcing ribs 70 are embedded in the concrete unloading platform 40, the manhole cover... The steel unloading plate 50, steel cylinder 30, concrete unloading platform 40, and multiple reinforcing ribs 70 are mounted on multiple reinforcing ribs 60. Therefore, the steel unloading plate 50, steel cylinder 30, concrete unloading platform 40, and multiple reinforcing ribs 70 constitute a rigid whole. When the wheels of heavy vehicles pass over the manhole cover 60, the load of the heavy vehicles is transferred to the rigid whole. The rigid whole can bear the load, and it can effectively distribute the concentrated wheel pressure load of heavy vehicles into a surface load. The surface load is then transferred to the concrete unloading platform 40, which distributes the load to the concrete. The soil cushion layer 20, through the concrete cushion layer 20, increases the cross-section for bearing the load, further dispersing the surface load and effectively spreading the load. The concrete cushion layer 20 transfers the load to the roadbed, avoiding stress concentration around the manhole 10, reducing the possibility of settlement of the roadbed around the manhole 10, and reducing the possibility of the manhole cover 60 sinking relative to the road surface. The rigid integral structure increases the support area, reducing the possibility of fatigue fracture of the manhole ring. Moreover, the rigid integral structure, as a load transfer and transition structure, makes the load transfer path continuous and smooth, efficiently converting it into a surface load and spreading it to a larger area of ​​the roadbed. This avoids the load being directly borne by the relatively weak manhole 10, reducing the vertical pressure and bending moment borne by the manhole 10, reducing the direct impact of heavy vehicle loads on the manhole 10, decoupling the manhole 10 from the dynamic load of the road surface, reducing the possibility of the manhole 10 collapsing, ensuring service life, ensuring road driving safety and comfort, and reducing the cost and difficulty of later maintenance.

[0033] Since multiple reinforcing ribs 70 are connected to the steel unloading plate 50 and multiple reinforcing ribs 70 are embedded in the concrete unloading platform 40, and the manhole cover 60 is set on multiple reinforcing ribs 70, the cooperation between the reinforcing ribs 70 and the concrete unloading platform 40 forms the ability to resist movement and rotation, thereby limiting the steel unloading plate 50 and ensuring the stability of the unloading plate 50 under load.

[0034] Since the manhole cover 60 is installed on the concrete unloading platform 40 and multiple reinforcing ribs 70, it can ensure that the manhole cover 60 can fully transfer the concentrated wheel pressure load of heavy vehicles to the concrete unloading platform 40 and multiple reinforcing ribs 70, thus realizing the load transfer and ensuring the stability of the manhole cover 60 installation.

[0035] In some embodiments, multiple reinforcing ribs 70 are welded to the steel unloading plate 50 and the steel cylinder 30, and a foundation pit is excavated on the roadbed corresponding to the location of the manhole 10. The excavated area of ​​the foundation pit is larger than the outer diameter of the manhole 10 and ≥1m, providing sufficient space for the subsequent pouring of the concrete unloading platform 40. The foundation pit is excavated to the road subbase, and the bottom and sidewalls of the foundation pit are compacted to ensure that the bearing capacity of the foundation meets the requirements. Then, the concrete subbase 20 is constructed, that is, concrete is poured inside the foundation pit and outside the manhole 10 to form the concrete subbase 20 (the thickness of the concrete subbase 20 is 200mm), and the height of the concrete subbase 20 is the same as the height of the manhole 10. Finally, the construction of the concrete unloading platform 40 is carried out, that is: the steel cylinder 30 is placed on the well cylinder 10, and high-strength concrete is poured. The steel cylinder 30 can be used as a formwork for concrete to facilitate pouring. After the high-strength concrete solidifies, the concrete unloading platform 40 is formed, and it is poured together with the steel unloading plate 50, the steel cylinder 30 and multiple reinforcing bars 70 to form a complete structure.

[0036] In some embodiments, the steel cylinder 30 can be part of the well casing 10, which increases the structural strength of the well casing 10 compared to the original well casing in the prior art (which is entirely made of concrete and / or brick structure), and further ensures the service life of the well casing 10.

[0037] Combination Figure 2 In some embodiments, multiple reinforcing ribs 70 are evenly spaced at equal angles to ensure that the load is evenly transferred to the concrete unloading platform 40.

[0038] Combination Figure 2In some embodiments, the concrete unloading platform 40 has multiple first mounting slots, each corresponding to a multiple reinforcing ribs 70. The reinforcing ribs 70 are embedded in the corresponding first mounting slots to facilitate their installation. For example, during the pouring of high-strength concrete to form the concrete unloading platform 40, the high-strength concrete is poured to encase the reinforcing ribs 70, and the first mounting slots are formed after the high-strength concrete solidifies.

[0039] In some embodiments, the width of the reinforcing rib 70 matches the width of the first mounting groove, and the height of the reinforcing rib 70 matches the depth of the first mounting groove, so as to ensure that the groove wall of the first mounting groove can clamp the reinforcing rib 70, thereby limiting the reinforcing rib 70, ensuring the ability to resist movement and rotation, and thus limiting the steel unloading plate 50, ensuring the stability of the unloading plate 50 under load.

[0040] Combination Figure 1 and Figure 2 In some embodiments, the steel unloading plate 50 has a second mounting groove, and the manhole cover 60 is embedded in the second mounting groove to facilitate the installation of the manhole cover 60.

[0041] Combination Figure 1 In some embodiments, the projections of a plurality of reinforcing ribs 70 along the axial direction of the steel cylinder 30 at least partially fall within the second mounting groove, so that the plurality of reinforcing ribs 70 can support the manhole cover 60.

[0042] Combination Figure 1 In some embodiments, the area of ​​the manhole cover 60 is matched with the area of ​​the second mounting groove so that the groove wall of the second mounting groove can limit the manhole cover 60 and ensure the stability of the manhole cover 60 installation.

[0043] Combination Figure 1 In some embodiments, the concrete unloading platform 40 has a third mounting groove, in which the steel unloading plate 50 is embedded to facilitate the installation of the steel unloading plate 50. For example, during the process of pouring high-strength concrete to form the concrete unloading platform 40, the high-strength concrete is poured to enclose the steel unloading plate 50, and the third mounting groove is formed after the high-strength concrete solidifies.

[0044] Combination Figure 1 In some embodiments, the area of ​​the steel unloading plate 50 is matched with the area of ​​the third mounting groove so that the groove wall of the third mounting groove can limit the steel unloading plate 50 and ensure the stability of the steel unloading plate 50 installation.

[0045] Combination Figure 1In some embodiments, the end face of the concrete unloading platform 40 facing away from the manhole 10, the end face of the steel unloading plate 50 facing away from the manhole 10, and the end face of the manhole cover 60 facing away from the manhole 10 are flush, so that the concrete unloading platform 40, the steel unloading plate 50 and the manhole cover 60 can be consistent with the final road surface elevation, ensuring smooth traffic.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0049] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0050] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A manhole, characterized in that, include: shaft; A concrete cushion layer is provided to surround the well shaft; A steel cylinder is installed on the well shaft; A concrete unloading platform is set up outside the steel cylinder and on the well cylinder and the concrete cushion layer; A steel unloading plate is embedded in the concrete unloading platform; The manhole cover is embedded in the steel unloading plate and placed on the concrete unloading platform; Multiple reinforcing ribs are connected to the outer wall of the steel cylinder and to the steel unloading plate, and the multiple reinforcing ribs are embedded in the concrete unloading platform; The manhole cover is mounted on multiple reinforcing ribs.

2. The inspection well according to claim 1, characterized in that, The multiple reinforcing ribs are evenly spaced at equal angles.

3. The inspection well according to claim 1, characterized in that, The concrete unloading platform has multiple first mounting slots, and each of the multiple first mounting slots corresponds to a multiple of the reinforcing ribs, with the reinforcing ribs embedded in the corresponding first mounting slots.

4. The inspection well according to claim 3, characterized in that, The width of the reinforcing rib matches the width of the first mounting groove, and the height of the reinforcing rib matches the depth of the first mounting groove.

5. The inspection well according to claim 1, characterized in that, The steel unloading plate has a second mounting groove, and the manhole cover is embedded in the second mounting groove.

6. The inspection well according to claim 5, characterized in that, Along the axial direction of the steel cylinder, the projections of the plurality of reinforcing ribs at least partially fall within the second mounting groove.

7. The inspection well according to claim 5, characterized in that, The area of ​​the manhole cover matches the area of ​​the second mounting groove.

8. The inspection well according to claim 1, characterized in that, The concrete unloading platform has a third mounting groove, and the steel unloading plate is embedded in the third mounting groove.

9. The inspection well according to claim 8, characterized in that, The area of ​​the steel unloading plate matches the area of ​​the third mounting groove.

10. The inspection well according to claim 1, characterized in that, The concrete unloading platform is flush with the end face of the well shaft facing away from the well shaft, the steel unloading plate is flush with the end face of the well shaft facing away from the well shaft, and the well cover is flush with the end face of the well shaft facing away from the well shaft.

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