A manhole anti-settling system and a construction process thereof

Abstract

This invention discloses a manhole anti-settlement system and its construction process, relating to the technical field of manholes. The system includes a manhole cover, a manhole ring, a manhole casing, and an anti-settlement component. The manhole opening is provided with a manhole casing, a manhole ring, and a manhole cover arranged sequentially from bottom to top. The manhole cover is movably attached to the top of the manhole ring and connected to the manhole casing from below. An anti-settlement component is installed between the lower surface of the manhole cover and the manhole ring. This anti-settlement component allows the manhole cover to extend and reposition vertically after being subjected to pressure. This invention, through the anti-settlement component, allows the manhole cover to extend and reposition vertically after being subjected to pressure, thus buffering the downward transmission of vehicle loads, effectively reducing the overall settlement of the manhole, and minimizing damage to the manhole and surrounding road surface.

Description

Technical Field

[0001] This invention relates to the technical field of manholes, and in particular to a manhole anti-settlement system and its construction process. Background Technology

[0002] As an essential facility in the design and construction of municipal roads, manholes play important roles in communication, water supply and drainage, electricity and gas transportation. The manhole cover is located above the manhole and is in direct contact with the road surface. The manhole chamber is connected to the pipeline and surrounded by backfill soil. The entire manhole structure is connected to the road surface structure, forming a tight whole.

[0003] In recent years, damage to municipal manholes and surrounding road surfaces has become increasingly common, posing a significant threat to urban roads. Since most municipal manholes are built on roadways, their covers are directly exposed to the road surface and subjected to continuous vertical compressive stress from vehicle and pedestrian loads. This stress is transmitted through the manhole cover to its base, creating a significant pressure difference between the road surface and the manhole cover. This makes the manhole cover and its surrounding surface prone to tilting, subsidence, bulging, and cracking. Cracks, potholes, and loosening of the surrounding surface also occur. When manhole covers sink, tilt, or break, and the surrounding road surface develops cracks and potholes, it not only severely affects the functionality of the manhole's pipelines but also causes significant bumps when vehicles pass over them, severely reducing road lifespan and driving comfort. Therefore, municipal construction departments must invest substantial financial and material resources annually in the repair and maintenance of manholes and surrounding road surfaces.

[0004] Currently, repairing the settlement of manhole covers requires milling away all the asphalt mixture around the cover, excavating the area where the cover needs adjustment, and then repaving the asphalt surface. This maintenance method is complex, and due to the difference in load-bearing capacity between the manhole cover and the road surface, uneven settlement of the cover under load is likely to occur, resulting in longitudinal height differences at the joints. Therefore, existing manhole covers need further improvement. Summary of the Invention

[0005] The purpose of this invention is to provide a manhole anti-settlement system and its construction process to solve the problems existing in the prior art, so that the manhole cover can buffer the traffic load and delay the settlement of the manhole structure.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a manhole anti-settlement system, including a manhole cover, a manhole ring, a manhole casing, and an anti-settlement component. The manhole casing, the manhole ring, and the manhole cover are arranged sequentially from bottom to top on the manhole opening. The manhole cover is movably engaged with the upper part of the manhole ring and connected to the manhole casing from the bottom. The anti-settlement component is arranged between the lower surface of the manhole cover and the manhole ring. The anti-settlement component enables the manhole cover to extend and reposition itself vertically after being subjected to pressure.

[0008] Preferably, a bolt cap with a bottom plate is cast inside the well casing, and a number of bolt countersunk holes are evenly distributed around the well ring. The bolt countersunk holes are connected to the bolt cap by bolts, so that the well ring is fixedly connected to the well casing.

[0009] Preferably, the anti-settlement component includes hydraulic telescopic rods, and a plurality of the hydraulic telescopic rods are evenly inserted into the manhole cover along the circumference. The upper end face of the top rod of all the hydraulic telescopic rods is flush with the lower surface of the manhole cover.

[0010] Preferably, the anti-settlement component further includes a hydraulic reset mechanism, which includes a piston cylinder, a piston, and springs. The piston is slidably sealed inside the piston cylinder. Several springs are arranged between the piston and the top of the piston cylinder. A hydraulic chamber is arranged between the piston and the bottom of the piston cylinder. The plug chamber of the hydraulic telescopic rod is connected to the hydraulic chamber through an oil pipe.

[0011] Preferably, a limit valve is provided on the oil pipe. The limit valve includes a valve cavity and a valve core. The valve core is slidably disposed in the valve cavity and divides the valve cavity into two oil chambers. The two oil chambers are respectively connected to the hydraulic cavity and the plug cavity of the hydraulic telescopic rod.

[0012] Preferably, an oil injection pipe is provided on the oil pipe, the oil injection pipe is arranged vertically upward, the upper end of the oil injection pipe is at least flush with the middle of the plug cavity of the hydraulic telescopic rod, and a valve is connected to the oil injection pipe by a thread.

[0013] Preferably, the hydraulic reset mechanism is located below the road base layer.

[0014] Preferably, both ends of the oil pipe are connected to the hydraulic cavity and the plug cavity of the hydraulic telescopic rod respectively through threaded connectors.

[0015] This invention also relates to a construction method for a manhole anti-settlement system, which specifically includes the following steps:

[0016] S1, prefabricate manhole covers, manhole rings, anti-settlement components and retaining sleeves, excavate manhole trenches, pour or build manhole cylinders, pre-install bolt caps inside the manhole cylinder, fix the manhole rings to the top surface of the manhole cylinder with bolts, prefabricate the hydraulic reset mechanism of the anti-settlement components below the road base layer, and connect the hydraulic chamber of the hydraulic reset mechanism to a connecting oil pipe;

[0017] S2, backfill and compact the manhole pit, apply adhesive material to the upper part of the backfill area, and connect the connection through the oil pipe with the limit valve to the plug cavity of the hydraulic telescopic rod of the anti-settlement component;

[0018] S3, add hydraulic oil through the oil injection pipe on the oil pipe, adjust the top rod of each hydraulic telescopic rod to the preset position, seal the oil injection pipe, and check the sealing performance of each hydraulic component;

[0019] S4, Lay the road and place the manhole cover on the top rod of the hydraulic telescopic rod.

[0020] Preferably, if hydraulic components fail or manholes settle, the hydraulic oil in the anti-settlement assembly needs to be replaced or the manhole ring needs to be raised to keep the manhole cover flush with the road surface.

[0021] The present invention achieves the following technical effects compared to the prior art:

[0022] This invention uses an anti-settlement component to allow the manhole cover to retract and reset vertically after being subjected to pressure, which has a buffering effect on the downward transmission of vehicle load, effectively reducing the overall settlement of the manhole and reducing damage to the manhole and the surrounding road surface. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the manhole anti-settlement system in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the hydraulic reset mechanism in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the well ring structure in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the limit valve in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram illustrating the matching of the bolt cap and the bolt in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the threaded connector in an embodiment of the present invention;

[0030] In the diagram: 1-Well ring, 2-Well barrel, 3-Hydraulic telescopic rod, 4-Bolt cap, 5-Bolt, 6-Oil pipe, 7-Threaded connector, 8-Valve chamber, 9-Valve core, 10-Injection pipe, 11-Valve, 12-Piston cylinder, 13-Piston, 14-Spring, 15-Well cover, 16-Sealing ring, 17-Road base layer. Detailed Implementation

[0031] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The purpose of this invention is to provide a manhole anti-settlement system and its construction process to solve the problems existing in the prior art, so that the manhole cover can play a buffering role against traffic loads and delay the settlement of the manhole structure.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figures 1 to 6 As shown, this embodiment provides a manhole anti-settlement system, including a manhole cover 15, a manhole ring 1, a manhole cylinder 2, and an anti-settlement component. The manhole cylinder 2, the manhole ring 1, and the manhole cover 15 are arranged sequentially from bottom to top on the manhole opening. The manhole cover 15 is movably snapped onto the upper part of the manhole ring 1 and connected to the manhole cylinder 2 at the lower part. An anti-settlement component is arranged between the lower surface of the manhole cover 15 and the manhole ring 1. The anti-settlement component can enable the manhole cover 15 to retract and reset in the vertical direction after being subjected to pressure.

[0036] As an optional solution, in this embodiment, a bolt cap 4 with a bottom plate is cast inside the well shaft 2, and several bolt countersunk holes are evenly distributed around the well ring 1 to ensure that there are no protrusions on the upper surface of the well ring 1. The bolt countersunk holes are connected to the bolt cap 4 through bolts 5, so that the well ring 1 and the well shaft 2 are fixedly connected, ensuring that the connection relationship of the structure is stable and reliable.

[0037] As an optional solution, in this embodiment, the anti-settlement component includes hydraulic telescopic rods 3. Several hydraulic telescopic rods 3 are evenly inserted into the manhole ring 1 along its circumference. The upper end face of the top rod of all hydraulic telescopic rods 3 is flush with the lower surface of the manhole cover 15, ensuring that the upper surface of the manhole cover 15 is flush with the road surface. Alternatively, the cylinder of the hydraulic telescopic rod 3 and the manhole ring 1 can be made into an integral structure.

[0038] As an optional solution, the anti-settlement component in this embodiment also includes a hydraulic reset mechanism. The hydraulic reset mechanism includes a piston cylinder 12, a piston 13 and a spring 14. The piston 13 is slidably sealed inside the piston cylinder 12. Several springs 14 are provided between the piston 13 and the top of the piston cylinder 12. A hydraulic chamber is provided between the piston 13 and the bottom of the piston cylinder 12. The plug chamber of the hydraulic telescopic rod 3 is connected to the hydraulic chamber through an oil pipe 6. In this embodiment, the spring 14 is preferably a spring with a large stiffness coefficient. The overall resistance of the spring 14 to load deformation can be selected according to the load conditions corresponding to the road design level, and the appropriate stiffness modulus and quantity can be selected. The spring 14 is located inside the piston cylinder 12. When the vertical pressure exceeds the maximum value that the road base can withstand, it will cause the piston cylinder 12 to deform vertically. At this time, the internal spring 14 can generate an upward reaction force to reduce the deformation of the piston cylinder 12 and the road base. When the piston cylinder 12 is subjected to pressure and produces longitudinal displacement, the spring 14 will have a certain buffering effect on the settlement of the road surface, and at the same time, it can also have a certain counteracting effect on the pressure brought by the piston 13. Preferably, a sealing ring 16 is provided on the piston 13 to prevent hydraulic oil from leaking out.

[0039] As an optional solution, in this embodiment, a limit valve is provided on the oil pipe 6. The limit valve includes a valve cavity and a valve core. The valve core is slidably disposed in the valve cavity. The valve core divides the valve cavity into two oil chambers. The two oil chambers are respectively connected to the hydraulic cavity and the plug cavity of the hydraulic telescopic rod 3. A sealing ring 16 is provided on the valve core to prevent oil leakage from the connection between the two oil chambers. In this embodiment, the valve core of the limit valve can move to both sides. When the manhole cover 15 is under pressure, the valve core moves to the lower side of the valve cavity, thereby causing the piston 13 of the piston cylinder 12 to push upward and further compress the spring 14. When the pressure on the manhole cover 15 increases, the valve core moves to the lowest side of the valve cavity, thereby limiting the movement. This causes the hydraulic pressure in the plug cavity of the hydraulic telescopic rod 3 to increase to cope with the greater pressure feedback. When the pressure on the manhole cover 15 decreases, the restoring force of the spring 14 causes the piston 13 of the piston cylinder 12 to move downward, pushing the valve core to the upper side of the valve cavity. This causes the hydraulic pressure in the plug cavity of the hydraulic telescopic rod 3 to increase, and the push rod moves upward to reset, allowing the manhole cover 15 to return to its original position and remain flush with the road surface. This process repeats, achieving a buffering effect on the manhole cover 15, effectively reducing the overall settlement of the manhole and reducing damage to the manhole and the surrounding road surface.

[0040] As an optional solution, in this embodiment, an oil injection pipe 10 is provided on the oil pipe 6. The oil injection pipe 10 is set vertically upward, and the upper end of the oil injection pipe 10 is at least flush with the middle of the plug cavity of the hydraulic telescopic rod 3. A valve 11 is connected to the oil injection pipe 10 by a thread to facilitate the injection of hydraulic oil with a certain pressure.

[0041] As an optional solution, in this embodiment, the hydraulic reset mechanism is located below the road base layer 17. When the piston cylinder 12 is subjected to pressure and undergoes longitudinal displacement, the spring 14 provides a certain buffering effect on the settlement of the road surface.

[0042] As an optional solution, in this embodiment, both ends of the oil pipe 6 are connected to the hydraulic chamber and the plug cavity of the hydraulic telescopic rod 3 respectively through threaded connectors. The threaded connector can be similar to a shower pipe connector, with one end of the threaded connector sealingly engaging with the oil pipe 6 and the other end connected to the opposite oil pipe 6 by threads. Preferably, a sealing ring 16 is provided inside the threaded connector to prevent hydraulic oil leakage.

[0043] Example 2

[0044] like Figure 1 As shown, this embodiment provides a construction method for a manhole anti-settlement system, based on the manhole anti-settlement system of Embodiment 1 above, specifically including the following steps:

[0045] S1, prefabricate manhole cover 15, manhole ring 1, anti-settlement component and retaining sleeve, excavate manhole trench, pour or build manhole cylinder 2, pre-install bolt cap 4 inside manhole cylinder 2, fix manhole ring 1 to the top surface of manhole cylinder 2 with bolt 5, prefabricate the hydraulic reset mechanism of anti-settlement component below road base 17, and connect the hydraulic chamber of hydraulic reset mechanism to a connecting oil pipe; retaining sleeve is placed around manhole cover before road construction to prevent soil from falling into manhole.

[0046] S2, backfill and compact the manhole trench, apply adhesive material to the upper part of the backfill area, and connect the plug cavity of the hydraulic telescopic rod 3 of the anti-settlement component through the oil pipe 6 with the limit valve;

[0047] S3, add hydraulic oil through the oil injection pipe 10 on the oil pipe 6, adjust the push rod of each hydraulic telescopic rod 3 to the preset position, seal the oil injection pipe 10, and check the sealing of each hydraulic component;

[0048] S4, Lay the road and place the manhole cover 15 on the top rod of the hydraulic telescopic rod 3.

[0049] As an optional solution, in this embodiment, if the hydraulic components fail or the manhole settles, it is necessary to replace the hydraulic oil in the anti-settlement component or raise the manhole ring 1 to keep the manhole cover 15 flush with the road surface.

[0050] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A manhole anti-settlement system, characterized in that: The manhole includes a manhole cover, a manhole ring, a manhole casing, and an anti-settlement component. The manhole casing, the manhole ring, and the manhole cover are arranged sequentially from bottom to top on the manhole opening. The manhole cover is movably engaged with the upper part of the manhole ring and connected to the manhole casing from the bottom. The anti-settlement component is arranged between the lower surface of the manhole cover and the manhole ring. The anti-settlement component enables the manhole cover to extend and retract vertically to return to its original position after being subjected to pressure. The anti-settlement assembly includes hydraulic telescopic rods, with several hydraulic telescopic rods evenly inserted into the manhole cover circumferentially. The upper surfaces of the top rods of all the hydraulic telescopic rods are flush with each other and abut against the lower surface of the manhole cover. The anti-settlement assembly also includes a hydraulic reset mechanism, which includes a piston cylinder, a piston, and springs. The piston is slidably sealed inside the piston cylinder, and several springs are arranged between the piston and the top of the piston cylinder. A hydraulic chamber is provided between the piston and the bottom of the piston cylinder, and the plug chamber of the hydraulic telescopic rods is connected via... The oil pipe is connected to the hydraulic chamber; a limit valve is provided on the oil pipe, the limit valve includes a valve chamber and a valve core, the valve core is slidably disposed in the valve chamber, the valve core divides the valve chamber into two oil chambers, the two oil chambers are respectively connected to the hydraulic chamber and the plug chamber of the hydraulic telescopic rod; an oil injection pipe is provided on the oil pipe, the oil injection pipe is arranged vertically upward, the upper end of the oil injection pipe is at least flush with the middle of the plug chamber of the hydraulic telescopic rod, and a valve is threadedly connected to the oil injection pipe; the hydraulic reset mechanism is located below the road base layer.

2. The manhole anti-settlement system according to claim 1, characterized in that: A bolt cap with a bottom plate is cast inside the well casing. Several bolt countersunk holes are evenly distributed around the well ring. The bolt countersunk holes are connected to the bolt cap by bolts, so that the well ring is fixedly connected to the well casing.

3. The manhole anti-settlement system according to claim 2, characterized in that: The two ends of the oil pipe are respectively connected to the hydraulic cavity and the plug cavity of the hydraulic telescopic rod through threaded connectors.

4. A construction method for a manhole anti-settlement system, based on the manhole anti-settlement system described in claim 3, characterized in that, Specifically, the following steps are included: S1, prefabricate manhole covers, manhole rings, anti-settlement components and retaining sleeves, excavate manhole trenches, pour or build manhole cylinders, pre-install bolt caps inside the manhole cylinder, fix the manhole rings to the top surface of the manhole cylinder with bolts, pre-place the hydraulic reset mechanism of the anti-settlement component below the road base layer, and connect the hydraulic chamber of the hydraulic reset mechanism to a connecting oil pipe. S2, backfill and compact the manhole pit, apply adhesive material to the upper part of the backfill area, and connect the hydraulic chamber to the plug cavity of the hydraulic telescopic rod of the anti-settlement component through an oil pipe with a limit valve; S3, add hydraulic oil through the oil injection pipe on the oil pipe, adjust the top rod of each hydraulic telescopic rod to the preset position, seal the oil injection pipe, and check the sealing performance of each hydraulic component; S4, Lay the road and place the manhole cover on the top rod of the hydraulic telescopic rod.

5. The construction method of the manhole anti-settlement system according to claim 4, characterized in that: If hydraulic components fail or manholes settle, the hydraulic oil in the anti-settlement components needs to be replaced or the manhole ring needs to be raised to keep the manhole cover flush with the road surface.

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