A manhole peripheral reinforcement protection device and a method for installing the same

Abstract

This invention proposes a manhole perimeter reinforcement and protection device and its installation method, belonging to the technical field of manhole perimeter reinforcement. It solves the problems of common road surface defects around existing manholes, such as annular cracks, depressions or potholes, and loose or displaced manhole covers, which affect driving comfort and safety. It includes a ring beam, a manhole cover support, a manhole casing protection device, integral high-strength bolts, and a manhole casing. The manhole casing comprises a first brick wall casing and a second brick wall casing, with the first brick wall casing positioned above the second. The ring beam is positioned between the first and second brick wall casings. The manhole casing protection device is fitted over the first brick wall casing and the ring beam. The manhole cover support is positioned on top of the manhole casing protection device. Integral high-strength bolts are embedded within the ring beam. It is mainly used for the reinforcement and protection of the manhole perimeter.

Description

Technical Field

[0001] This invention belongs to the field of manhole perimeter reinforcement technology, and in particular relates to a manhole perimeter reinforcement and protection device and its installation method. Background Technology

[0002] On driving lanes or roads with heavy vehicle traffic, the road surface around manholes commonly suffers from hazards such as ring-shaped cracks, depressions or potholes, and loose or displaced manhole covers, thus affecting driving comfort and safety. The main reasons for this are as follows:

[0003] 1. The appearance of ring cracks around the manhole mainly indicates that the asphalt pavement is in serious condition. The main reasons are insufficient strength of the material around the manhole or certain settlement of the backfill material. Under the long-term action of vehicles, the asphalt, which is a flexible material, combines with the rigid material of the manhole cover, eventually leading to the failure of the flexible material.

[0004] 2. The manhole cover support is not connected to the manhole casing. The manhole cover will shift under the action of vehicles. Over time, the material around the manhole cover support will suffer fatigue damage, resulting in dents or pits, loosening and displacement of the manhole cover and other hazards. Summary of the Invention

[0005] In view of this, the present invention aims to propose a manhole perimeter reinforcement and protection device and its installation method to solve the problems of common road surface hazards around existing manholes, such as annular cracks, depressions or potholes, and loose or displaced manhole covers, which affect driving comfort and driving safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a manhole perimeter reinforcement and protection device, comprising a ring beam, a manhole cover support, a manhole casing protection device, an integral high-strength bolt, and a manhole casing. The manhole casing includes a first brick wall manhole casing and a second brick wall manhole casing. The first brick wall manhole casing is positioned above the second brick wall manhole casing. The ring beam is positioned between the first and second brick wall manhole casings. The manhole casing protection device is sleeved above the first brick wall manhole casing and the ring beam. The manhole cover support is positioned at the top of the manhole casing protection device. An integral high-strength bolt is embedded in the ring beam. The integral high-strength bolt includes a connecting ring and multiple high-strength bolts. The connecting ring is embedded inside the ring beam. The multiple high-strength bolts are evenly arranged circumferentially at the top of the connecting ring. The high-strength bolts sequentially pass through the top of the ring beam, the first brick wall manhole casing, the manhole casing protection device, and the manhole cover support.

[0007] Furthermore, the manhole perimeter reinforcement and protection device is installed within the road structure layer, which includes, from top to bottom, a fine-grained asphalt surface layer, a medium-grained asphalt surface layer, a coarse-grained asphalt surface layer, a cement-stabilized crushed stone upper base course, a cement-stabilized crushed stone lower base course, and a roadbed.

[0008] Furthermore, the manhole cover support is installed within the fine-grained asphalt surface layer and the medium-grained asphalt surface layer, the first masonry brick wall manhole is installed within the coarse-grained asphalt surface layer, the ring beam is installed within the cement-stabilized crushed stone upper base layer, and the second masonry brick wall manhole is installed within the cement-stabilized crushed stone lower base layer and the roadbed.

[0009] Furthermore, a nut is connected to the top of the high-strength bolt, and the bottom of the nut abuts against the upper surface of the manhole cover support.

[0010] Furthermore, the ring beam is made of C15 grade cast-in-place reinforced concrete, which includes a steel cage and concrete, with the steel cage embedded in the concrete.

[0011] Furthermore, a manhole cover is provided on the top of the manhole cover support.

[0012] Furthermore, the number of high-strength bolts is four.

[0013] Furthermore, the thickness of both the cement-stabilized crushed stone upper base layer and the cement-stabilized crushed stone lower base layer is 18cm.

[0014] Furthermore, the thicknesses of the fine-grained asphalt surface layer, the medium-grained asphalt surface layer, and the coarse-grained asphalt surface layer are 4cm, 6cm, and 8cm, respectively.

[0015] The present invention also provides a method for installing a well perimeter reinforcement and protection device, which includes the following steps:

[0016] Step 1: Construct the manhole casing. When the second brick wall casing is constructed to the top surface of the roadbed, cover the manhole opening with a steel plate and locate the center of the manhole.

[0017] Step 2: Construct the cement-stabilized crushed stone subbase. After the cement-stabilized crushed stone subbase is completed, locate the manhole using a total station coordinate system. Locate the manhole using reverse excavation. Destroy the road structure layer within the manhole shaft construction area and extend it to the top surface of the cement-stabilized crushed stone subbase by building a second brick wall manhole. Cover the manhole opening with a steel plate until the maintenance and acceptance are qualified. Then, begin preparations for the construction of the cement-stabilized crushed stone upper base.

[0018] Step 3: Construct the cement-stabilized crushed stone upper base course. After the cement-stabilized crushed stone upper base course is laid and compacted, immediately excavate back to extend the manhole to 1cm below the top surface of the coarse-grained asphalt surface. Place a steel cage on the top of the second brick wall manhole and pre-embed integral high-strength bolts in the steel cage. Set up the formwork and pour concrete for curing to form the ring beam. After the ring beam is formed, complete the construction of the first brick wall manhole on the top of the ring beam. At this time, install the manhole protection device. After the installation is completed, immediately lay the cement-stabilized crushed stone upper base course within the construction range of the protection device outside the manhole to be level. Cover the manhole opening and complete the static compaction and water curing around the manhole.

[0019] Step 4: After the cement-stabilized crushed stone base course is completed and cured, spray tack coat and begin paving the coarse-grained asphalt surface layer. When the temperature of the coarse-grained asphalt surface layer drops below 50℃, spray tack coat and pave the medium-grained asphalt surface layer. After compaction, use reverse excavation to break up and clean the medium-grained asphalt surface layer within the manhole cover support area. Start installing the manhole cover support and tighten the nuts. Finally, complete the paving of the medium-grained asphalt surface layer and the overall fine-grained asphalt surface layer within the manhole cover support area.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention uses a cast-in-place reinforced concrete ring beam on the manhole shaft to control the uniform settlement of the manhole structure. Furthermore, the pre-embedded integral high-strength bolts in the ring beam serve as connecting components between the manhole shaft and the manhole cover support. This effectively improves the quality and durability of the project, reduces the probability of damage to the manhole cover and surrounding area, and provides strong protection for driving comfort and safety.

[0022] 2. The present invention is equipped with a well shaft protection device, which protects the well shaft and its surrounding area, effectively preventing rainwater infiltration that could reduce structural strength. It also reinforces the structure of the well shaft extension section after reverse excavation around the well, improving the overall strength of the structural layer and effectively enhancing the durability of the structure, thus providing a solid foundation for driving comfort and safety.

[0023] 3. The manhole cover support of the present invention is connected to the ring beam with pre-embedded high-strength bolts, changing the traditional movable installation form to a fixed installation, which makes the manhole cover and the manhole shell more integrated, avoiding the hazards of manhole loosening and abnormal noise, and providing strong protection for driving safety. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the manhole perimeter reinforcement and protection device and the road surface structure layer described in this invention;

[0026] Figure 2 This is a top view schematic diagram of the integral high-strength bolt structure of the inspection well perimeter reinforcement and protection device according to the present invention;

[0027] Figure 3 This is a side view schematic diagram of the structure of an integral high-strength bolt for a well perimeter reinforcement and protection device according to the present invention;

[0028] Figure 4 This is a top view schematic diagram of the structure of a wellbore protection device according to the present invention, which is a wellbore reinforcement and protection device around a manhole.

[0029] Figure 5 This is a side view schematic diagram of the structure of a wellbore protection device according to the present invention, which is a wellbore reinforcement and protection device around a manhole.

[0030] Figure 6 This is a top view schematic diagram of the structure of the manhole cover support of the manhole perimeter reinforcement and protection device according to the present invention;

[0031] Figure 7 This is a side view schematic diagram of the structure of a manhole cover support for a manhole perimeter reinforcement and protection device according to the present invention;

[0032] Figure 8 This is a top view schematic diagram of the nut of the well perimeter reinforcement and protection device for inspection wells according to the present invention;

[0033] Figure 9 for Figure 8 Elevation view at point AA;

[0034] Figure 10 for Figure 8 Elevation view at point BB.

[0035] 1-Manhole cover support, 2-Manhole cover, 3-Manhole protection device, 4-Ring beam, 5-Integral high-strength bolt, 6-First brick wall manhole, 7-Second brick wall manhole, 8-Connecting ring, 9-High-strength bolt, 10-Nut, 11-Fine-grained asphalt surface layer, 12-Medium-grained asphalt surface layer, 13-Coarse-grained asphalt surface layer, 14-Cement-stabilized crushed stone upper base course, 15-Cement-stabilized crushed stone lower base course, 16-Roadbed. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0037] See Figure 1-10 This embodiment describes a manhole perimeter reinforcement and protection device, comprising a ring beam 4, a manhole cover support 1, a manhole casing protection device 3, an integral high-strength bolt 5, and a manhole casing. The manhole casing includes a first brick wall casing 6 and a second brick wall casing 7. The first brick wall casing 6 is positioned above the second brick wall casing 7. The ring beam 4 is positioned between the first brick wall casing 6 and the second brick wall casing 7. The manhole casing protection device 3 is sleeved above the first brick wall casing 6 and the ring beam 4. The manhole cover support 1 is positioned on top of the manhole casing protection device 3. An integral high-strength bolt 5 is embedded within the ring beam 4. The integral high-strength bolt 5 includes a connecting ring 8 and multiple high-strength bolts 9. The connecting ring 8 is embedded inside the ring beam 4. The multiple high-strength bolts 9 are evenly distributed circumferentially on top of the connecting ring 8. The high-strength bolts 9 sequentially pass through the top of the ring beam 4, the first brick wall casing 6, the manhole casing protection device 3, and the manhole cover support 1.

[0038] In this embodiment, a cast-in-place reinforced concrete ring beam 4 is installed on the manhole shaft to control the uniform settlement of the manhole structure. Furthermore, an integral high-strength bolt 5 is pre-embedded in the ring beam 4 as a connecting component between the manhole shaft and the manhole cover support 1. This effectively improves the quality and durability of the project, reduces the probability of damage to the manhole cover and the surrounding area, and provides strong protection for driving comfort and safety.

[0039] In this embodiment, a well casing protection device 3 is provided, which protects both the well casing and the surrounding area. It can effectively prevent rainwater infiltration, which would reduce the structural strength. It also strengthens the structure of the well casing extension section after back excavation around the well, improving the overall strength of the structural layer and effectively enhancing the durability of the structure, thus providing a solid foundation for driving comfort and safety.

[0040] In this embodiment, the manhole cover support 1 is connected to the ring beam 4 with pre-embedded high-strength bolts 9, changing the traditional movable installation form to a fixed installation, which makes the manhole cover 2 and the well barrel more integrated, avoiding the hazards of manhole loosening and abnormal noise, and providing strong protection for driving safety.

[0041] In this embodiment, the manhole perimeter reinforcement and protection device is installed within the road structure layer, which includes, from top to bottom, a fine-grained asphalt surface layer 11, a medium-grained asphalt surface layer 12, a coarse-grained asphalt surface layer 13, a cement-stabilized crushed stone upper base course 14, a cement-stabilized crushed stone lower base course 15, and a roadbed 16.

[0042] In this embodiment, the manhole cover support 1 is installed in the fine-grained asphalt surface layer 11 and the medium-grained asphalt surface layer 12, the first masonry brick wall manhole 6 is installed in the coarse-grained asphalt surface layer 13, the ring beam 4 is installed in the cement-stabilized crushed stone upper base layer 14, and the second masonry brick wall manhole 7 is installed in the cement-stabilized crushed stone lower base layer 15 and the roadbed 16.

[0043] In this embodiment, the top of the high-strength bolt 9 is connected to a nut 10, and the bottom of the nut 10 abuts against the upper surface of the manhole cover support 1. The nut 10 is used to connect and fix the high-strength bolt 9.

[0044] In this embodiment, the ring beam 4 is made of C15 grade cast-in-place reinforced concrete. The C15 grade cast-in-place reinforced concrete includes a reinforcing cage and concrete. The reinforcing cage is embedded in the concrete. In this embodiment, the ring beam 4 is made of C15 grade cast-in-place reinforced concrete, with structural dimensions of 18cm in height and 22cm in width. The reinforcing cage is composed of 4 main bars with a diameter of 12cm and stirrups with a diameter of 8cm and a spacing of 20cm, all of which are HRB335 steel bars. The concrete cover for the reinforcing bars is 3cm. Annular high-strength bolts are pre-embedded inside the ring beam.

[0045] In this embodiment, a manhole cover 2 is provided on the top of the manhole cover support 1.

[0046] In this embodiment, the number of high-strength bolts 9 is four.

[0047] In this embodiment, the thickness of both the cement-stabilized crushed stone upper base layer 14 and the cement-stabilized crushed stone lower base layer 15 is 18cm.

[0048] In this embodiment, the thicknesses of the fine-grained asphalt surface layer 11, the medium-grained asphalt surface layer 12, and the coarse-grained asphalt surface layer 13 are 4cm, 6cm, and 8cm, respectively.

[0049] In this embodiment, the well casing protection device 3 is made of 3mm steel plate, has a square shape, and is fixed on the inspection well casing.

[0050] This embodiment also provides a method for installing a well perimeter reinforcement and protection device, which includes the following steps:

[0051] Step 1: Construct the manhole casing. When the second brick wall casing 7 is constructed to the top surface of the roadbed 16, cover the manhole opening with a steel plate and locate the center of the manhole. In this embodiment, the steel plate is 0.5cm thick and 80cm in diameter.

[0052] Step 2: Construct the cement-stabilized crushed stone subbase 15. After the cement-stabilized crushed stone subbase 15 is completed, locate the manhole using a total station coordinate system. Locate the manhole using reverse excavation. Destroy the road structure layer within the manhole shaft construction area and extend it to the top surface of the second brick wall manhole shaft 7. Cover the manhole opening with a steel plate until the maintenance and acceptance are qualified. Then, begin preparations for the construction of the cement-stabilized crushed stone upper base 14. In this embodiment, the steel plate is 0.5cm thick and 80cm in diameter.

[0053] Step 3: Construct the cement-stabilized crushed stone upper base 14. After the cement-stabilized crushed stone upper base 14 is laid and compacted, immediately excavate the extension shaft to 1cm below the top surface of the coarse-grained asphalt surface layer 13. Place a steel cage on the top of the second brick wall shaft 7 and pre-embed integral high-strength bolts 5 in the steel cage. Set up the formwork and pour concrete and cure it to form the ring beam 4. After the ring beam 4 is formed, complete the construction of the first brick wall shaft 6 on the top of the ring beam 4. At this time, install the shaft protection device 3. After the installation is completed, immediately lay the cement-stabilized crushed stone upper base 14 within the construction range of the shaft protection device 3 outside the manhole shaft, cover the manhole opening, and complete the static compaction and water curing around the shaft.

[0054] Step 4: After the cement-stabilized crushed stone upper base course 14 is completed and cured, spray tack coat and begin paving the coarse-grained asphalt surface layer 13. When the temperature of the coarse-grained asphalt surface layer 13 drops below 50℃, spray tack coat and pave the medium-grained asphalt surface layer 12. After compaction, use reverse excavation to break up and clean the medium-grained asphalt surface layer 12 within the manhole cover support 1 area. After installing the manhole cover support 1, tighten the nuts 10. Finally, complete the paving of the medium-grained asphalt surface layer 12 and the overall fine-grained asphalt surface layer 11 within the manhole cover support 1 area.

[0055] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A method for installing a perimeter reinforcement and protection device for inspection wells, characterized in that: The manhole reinforcement and protection device includes a ring beam (4), a manhole cover support (1), a manhole casing protection device (3), an integral high-strength bolt (5), and a manhole casing. The manhole casing includes a first brick wall casing (6) and a second brick wall casing (7). The first brick wall casing (6) is located above the second brick wall casing (7). The ring beam (4) is located between the first brick wall casing (6) and the second brick wall casing (7). The manhole casing protection device (3) is sleeved on the first brick wall casing (6) and the ring beam (4). Above the well cover support (1), the well cover support (1) is set on the top of the well protection device (3). An integral high-strength bolt (5) is embedded in the ring beam (4). The integral high-strength bolt (5) includes a connecting ring (8) and multiple high-strength bolts (9). The connecting ring (8) is embedded inside the ring beam (4). The multiple high-strength bolts (9) are evenly arranged on the top of the connecting ring (8) along the circumference. The high-strength bolts (9) pass through the top of the ring beam (4), the first masonry brick wall well (6), the well protection device (3), and the well cover support (1) in sequence. The installation method includes the following steps: Step 1: Construct the manhole casing. When the second brick wall casing (7) is constructed to the top surface of the roadbed (16), use a steel plate to cover the manhole opening and make coordinate positioning for the center of the manhole. Step 2: Construction of cement-stabilized crushed stone subbase (15) is carried out. After the cement-stabilized crushed stone subbase (15) is completed, the manhole is located by coordinate positioning of the total station. The manhole is found by reverse excavation. The road structure layer within the construction range of the manhole is broken and extended to the second brick wall manhole (7). After reaching the top surface of the cement-stabilized crushed stone subbase (15), the manhole opening is covered with steel plate until the maintenance is qualified. Then, preparation for the construction of cement-stabilized crushed stone upper base (14) begins. Step 3: Construct the cement-stabilized crushed stone upper base (14), and after the cement-stabilized crushed stone upper base (14) is spread and compacted, immediately excavate the extension shaft to 1cm below the top surface of the coarse-grained asphalt surface layer (13), place a steel cage on the top of the second masonry wall shaft (7) and pre-embed an integral high-strength bolt (5) in the steel cage, set up the template and pour concrete and then cure it to form the ring beam (4). After the ring beam (4) is formed, complete the construction of the first masonry wall shaft (6) on the top of the ring beam (4). At this time, install the shaft protection device (3). After the installation is completed, immediately spread the cement-stabilized crushed stone upper base (14) within the construction range of the shaft protection device (3) outside the inspection shaft, cover the wellhead of the inspection shaft and complete the static pressure compaction and water curing around the shaft. Step 4: After the cement-stabilized crushed stone upper base course (14) is completed and the curing is finished, spray the tack coat and start the coarse-grained asphalt surface layer (13). When the temperature of the coarse-grained asphalt surface layer (13) drops below 50℃, spray the tack coat and start the medium-grained asphalt surface layer (12). After compaction, the medium-grained asphalt surface layer (12) within the manhole cover support (1) area is broken and cleaned by reverse excavation. Then, the manhole cover support (1) is installed and the nuts (10) are tightened. Finally, the medium-grained asphalt surface layer (12) and the overall fine-grained asphalt surface layer (11) within the manhole cover support (1) area are completed.

2. The installation method of the inspection well perimeter reinforcement and protection device according to claim 1, characterized in that: The manhole reinforcement and protection device is installed inside the road structure layer, which includes a fine-grained asphalt surface layer (11), a medium-grained asphalt surface layer (12), a coarse-grained asphalt surface layer (13), a cement-stabilized crushed stone upper base course (14), a cement-stabilized crushed stone lower base course (15), and a roadbed (16) arranged layer by layer from top to bottom.

3. The installation method of the inspection well perimeter reinforcement and protection device according to claim 2, characterized in that: The manhole cover support (1) is installed in the fine-grained asphalt surface layer (11) and the medium-grained asphalt surface layer (12), the first masonry brick wall manhole (6) is installed in the coarse-grained asphalt surface layer (13), the ring beam (4) is installed in the cement-stabilized crushed stone upper base layer (14), and the second masonry brick wall manhole (7) is installed in the cement-stabilized crushed stone lower base layer (15) and the roadbed (16).

4. The installation method of the inspection well perimeter reinforcement and protection device according to claim 1, characterized in that: The top of the high-strength bolt (9) is connected to a nut (10), and the bottom of the nut (10) abuts against the upper surface of the manhole cover support (1).

5. The installation method of the inspection well perimeter reinforcement and protection device according to claim 1, characterized in that: The ring beam (4) is made of C15 grade cast-in-place reinforced concrete, which includes a steel cage and concrete, with the steel cage embedded in the concrete.

6. The installation method of the inspection well perimeter reinforcement and protection device according to claim 1, characterized in that: The top of the manhole cover support (1) is provided with a manhole cover (2).

7. The installation method of the inspection well perimeter reinforcement and protection device according to claim 1, characterized in that: The number of the high-strength bolts (9) is four.

8. The installation method of the inspection well perimeter reinforcement and protection device according to claim 2, characterized in that: The thickness of both the cement-stabilized crushed stone upper base layer (14) and the cement-stabilized crushed stone lower base layer (15) is 18cm.

9. The installation method of the inspection well perimeter reinforcement and protection device according to claim 2, characterized in that: The thicknesses of the fine-grained asphalt surface layer (11), the medium-grained asphalt surface layer (12), and the coarse-grained asphalt surface layer (13) are 4 cm, 6 cm, and 8 cm, respectively.

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