Construction structure of asphalt pavement inspection well

Abstract

This utility model relates to the field of road engineering construction technology, specifically to a construction structure for raising asphalt pavement manholes. It includes a precast manhole casing, an adjustable formwork mechanism, and an anti-deviation manhole cover installation mechanism. The precast manhole casing is located inside the adjustable formwork mechanism. In this utility model, the use of a precast steel membrane, horizontal adjusting bolts, and embedded reinforcing bars creates a synergistic system of stable bottom support, precise mid-section adjustment, and rigid outer perimeter protection. The horizontal adjusting bolts allow for height adjustment, controlling the horizontal deviation of the steel plate's top surface within a reasonable range, ensuring the manhole cover is flush with the asphalt pavement. Simultaneously, the horizontal adjusting bolts and the precast steel membrane are detachably threaded, allowing for reuse in subsequent manhole raising operations after the concrete layer has cured, preventing road surface bumps caused by later settlement. The precast steel membrane, through vertical and horizontal reinforcing ribs, effectively resists the lateral pressure of the concrete, better dispersing the impact of vehicle loads on the precast manhole casing.

Description

Technical Field

[0001] This utility model relates to the field of road engineering construction technology, and in particular to the construction structure for raising asphalt pavement manholes. Background Technology

[0002] As a key ancillary facility of underground pipeline systems on asphalt pavements, manholes must have their top surface flush with the road surface to ensure vehicle safety. This method is suitable for raising manholes on asphalt pavements such as urban arterial roads, secondary roads, highways, and industrial park roads. It can solve problems such as manhole seat displacement, concrete leakage around the manhole, and poor road surface smoothness encountered in traditional manhole raising construction, thus improving the synergistic stability and long-term reliability of the manhole and the asphalt pavement.

[0003] When using existing technical solutions, as the road ages and the roadbed settles, the manholes often become lower than the road surface, which can easily affect driving safety. During installation and use, the manhole ring is prone to horizontal displacement due to vehicle load impact, causing the manhole cover to misalign with the road surface.

[0004] To address the aforementioned problems, this utility model provides a construction structure for raising asphalt pavement inspection wells. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that in the existing technology, manholes often have an elevation lower than the road surface, which can easily affect driving safety. The proposed structure is a construction structure for raising manholes on asphalt pavement.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a construction structure for raising an asphalt pavement manhole, comprising a precast manhole, an adjustable formwork mechanism, and an anti-deviation manhole cover installation mechanism. The precast manhole is located inside the adjustable formwork mechanism, and the anti-deviation manhole cover installation mechanism is located at the top of the adjustable formwork mechanism. The inner diameter of the precast manhole is consistent with the designed inner diameter of the manhole.

[0007] The adjustable formwork mechanism includes a steel membrane support assembly and a bottom support assembly. The steel membrane support assembly includes a precast steel membrane and vertical reinforcing ribs, and the bottom support assembly includes a well base and pre-embedded reinforcing bars.

[0008] The precast well shaft is located inside the precast steel membrane. The outer surface of the precast well shaft and the inner surface of the precast steel membrane are filled with a concrete layer. The top of the precast steel membrane has multiple threaded holes along the circumferential direction. A steel plate is threadedly connected to the top of the precast steel membrane. A horizontal adjusting bolt is threadedly connected to the inside of the threaded holes. The steel plate is threadedly connected to the top of the precast steel membrane through the horizontal adjusting bolt.

[0009] Furthermore, the vertical reinforcing ribs are evenly spaced along the height direction of the outer wall of the precast steel membrane, and the outer surface of the precast steel membrane is welded with transverse reinforcing ribs along the circumferential direction.

[0010] Furthermore, fasteners are welded to the connection and fixing points of the transverse reinforcing ribs and the vertical reinforcing ribs, and lifting rings are fixedly connected at equal intervals along the circumferential direction on the outer surface of the top of the precast steel membrane.

[0011] Furthermore, the well base is fixedly connected to the bottom of the precast well cylinder and the precast steel membrane. The well base is provided with a connecting groove, and a sealing gasket is snapped into the inside of the connecting groove. The precast well cylinder and the precast steel membrane are snapped into the inside of the connecting groove. The precast well cylinder and the precast steel membrane are fixedly connected to the inside of the well base through a concrete layer.

[0012] Furthermore, the pre-embedded reinforcing steel bars are fixedly connected to the inner bottom wall of the well base, and the well base is fixedly connected to the interior of the inspection well foundation through the pre-embedded reinforcing steel bars.

[0013] Furthermore, the anti-deviation manhole cover installation mechanism includes a manhole base fixedly connected to the top of the steel plate, an annular support platform fixedly connected to the top of the manhole base, a plurality of side reinforcing plates fixedly connected at equal intervals on the outer surface of the annular support platform, and a lifting ring fixedly connected to the top of the manhole base.

[0014] Furthermore, the outer surface of the lifting ring is fixedly connected with a limiting frame at equal intervals, the inner wall of the lifting ring is fitted with a waterproof sealing gasket, the inside of the lifting ring is fitted with a well cover, the outer surface of the well cover is fitted with the inside of the limiting frame, the outer surface of the well cover is threaded with an anti-deviation limiting screw at equal intervals, and the well cover is threaded to the inside of the lifting ring through the anti-deviation limiting screw.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] In this invention, a collaborative system is constructed by setting up a precast steel membrane, horizontal adjusting bolts, and pre-embedded reinforcing bars, forming a stable bottom support, precise middle adjustment, and rigid outer protection. The horizontal adjusting bolts can adjust the height, controlling the horizontal deviation of the top surface of the steel plate within a reasonable range, ensuring that the manhole cover is flush with the asphalt pavement and avoiding bumps when vehicles pass by. At the same time, the horizontal adjusting bolts and the precast steel membrane are detachable threaded connections, and after the concrete layer is cured, it can be reused for subsequent manhole lifting construction, avoiding road bumps caused by later settlement. The precast steel membrane, through vertical and horizontal reinforcing ribs, can effectively resist the lateral pressure of concrete, prevent the formwork from bulging and deforming, and better disperse the impact of vehicle loads on the precast manhole. Attached Figure Description

[0017] Figure 1A three-dimensional structural diagram of the construction structure for raising an asphalt pavement inspection well is provided for this utility model.

[0018] Figure 2 A schematic diagram of the sealing and leak-proof gasket in the construction structure for raising asphalt pavement inspection wells proposed in this utility model;

[0019] Figure 3 This utility model proposes a construction structure for raising asphalt pavement inspection wells. Figure 2 Enlarged view of point A;

[0020] Figure 4 This utility model provides a schematic diagram of the manhole base in the construction structure for raising asphalt pavement manholes;

[0021] Figure 5 A schematic diagram of the transverse reinforcing ribs in the construction structure for raising asphalt pavement inspection wells proposed in this utility model;

[0022] Figure 6 This utility model proposes a construction structure for raising asphalt pavement inspection wells. Figure 5 Enlarged diagram of point B.

[0023] Legend:

[0024] 1. Precast well shaft; 2. Adjustable formwork lifting mechanism; 21. Steel membrane support assembly; 211. Precast steel membrane; 212. Vertical reinforcing rib; 213. Concrete layer; 214. Connecting threaded hole; 215. Steel plate; 216. Horizontal adjusting bolt; 217. Transverse reinforcing rib; 218. Fastener; 219. Lifting ring; 22. Bottom support assembly; 221. Well base; 222. Embedded reinforcing steel bar; 223. Connecting slot; 224. Sealing gasket; 3. Anti-deviation well cover installation mechanism; 31. Well base; 32. Circular support platform; 33. Side reinforcing plate; 34. Well lifting ring; 35. Limiting frame; 36. Waterproof sealing gasket; 37. Well cover; 38. Anti-deviation limiting screw. Detailed Implementation

[0025] Please see Figure 1-6 This utility model provides a technical solution: a construction structure for raising an asphalt pavement manhole, including a precast manhole 1, an adjustable formwork mechanism 2, and an anti-deviation manhole cover installation mechanism 3. The precast manhole 1 is located inside the adjustable formwork mechanism 2, and the anti-deviation manhole cover installation mechanism 3 is located on top of the adjustable formwork mechanism 2. The inner diameter of the precast manhole 1 is consistent with the designed inner diameter of the manhole.

[0026] The following section will explain the specific setup and function of its adjustable lifting mechanism 2 and anti-deviation manhole cover installation mechanism 3.

[0027] In this implementation scheme: the adjustable formwork mechanism 2 includes a steel membrane support assembly 21 and a bottom support assembly 22. The steel membrane support assembly 21 includes a precast steel membrane 211 and vertical reinforcing ribs 212. The bottom support assembly 22 includes a well base 221 and pre-embedded reinforcing bars 222.

[0028] The precast shaft 1 is located inside the precast steel membrane 211. The outer surface of the precast shaft 1 and the inner surface of the precast steel membrane 211 are filled with a concrete layer 213. The top of the precast steel membrane 211 has multiple threaded holes 214 along the circumferential direction. A steel plate 215 is threadedly connected to the top of the precast steel membrane 211. A horizontal adjusting bolt 216 is threadedly connected inside the threaded holes 214. The steel plate 215 is threadedly connected to the top of the precast steel membrane 211 through the horizontal adjusting bolt 216.

[0029] The effects achieved by the above components are as follows: the precast steel membrane 211 and the precast manhole 1 form an annular casting space, and the dense concrete layer 213 fills the space to firmly connect the two, thereby improving the radial bearing capacity of the manhole and enabling it to withstand repeated impacts from vehicle loads. The connecting threaded hole 214 provides a precise installation reference for the horizontal adjustment bolt 216. The steel plate 215 can be adjusted horizontally at the millimeter level by rotating the bolt, ensuring that the top surface of the steel plate 215 is flush with the asphalt pavement elevation. Ultimately, the height difference between the manhole cover 37 and the road surface is controlled within a reasonable range, eliminating bumps during vehicle passage. The steel plate 215 is connected to the steel membrane by bolts to form a horizontal load-bearing surface, which evenly transfers the load of the upper manhole seat 31 to the concrete layer 213, avoiding concrete cracking caused by local stress concentration.

[0030] Specifically, vertical reinforcing ribs 212 are evenly spaced along the height direction of the outer wall of the precast steel membrane 211, and transverse reinforcing ribs 217 are welded to the outer surface of the precast steel membrane 211 along the circumferential direction.

[0031] The effects achieved by the above components are as follows: the vertical reinforcing ribs 212 and the horizontal reinforcing ribs 217 form a reinforcing structure, which significantly improves the overall rigidity of the precast steel membrane 211, enhances the radial deformation resistance of the steel membrane, avoids uneven thickness of the concrete layer 213 caused by the expansion of the steel membrane, and the reinforcing ribs disperse the external impact of the steel membrane during hoisting and construction, ensuring the reuse rate of the steel membrane.

[0032] Specifically, fasteners 218 are welded to the connection and fixing points of the transverse reinforcing ribs 217 and the vertical reinforcing ribs 212, and lifting rings 219 are fixedly connected at equal intervals along the circumferential direction on the outer surface of the top of the precast steel membrane 211.

[0033] The effects achieved by the above components are as follows: Fastener 218 is welded to the connection between the horizontal reinforcing rib 217 and the vertical reinforcing rib 212. By increasing the welding contact area, the connection strength between the reinforcing rib and the steel membrane is strengthened, and the reinforcing rib is prevented from falling off after long-term stress. Lifting ring 219 can ensure that the prefabricated steel membrane 211 is stably stressed during installation and removal, and avoids installation deviation caused by the tilting of the steel membrane.

[0034] Specifically, the well base 221 is fixedly connected to the bottom of the precast well cylinder 1 and the precast steel membrane 211. The well base 221 is provided with a connecting groove 223. A sealing and leak-proof gasket 224 is inserted into the connecting groove 223. The precast well cylinder 1 and the precast steel membrane 211 are inserted into the connecting groove 223. The precast well cylinder 1 and the precast steel membrane 211 are fixedly connected to the inside of the well base 221 through a concrete layer 213.

[0035] The effects achieved by the above components are as follows: the manhole base 221 achieves precise positioning of the precast manhole cylinder 1 and the precast steel membrane 211 through the connecting slot 223, avoiding the deviation problem of traditional manual positioning; the sealing and leak-proof gasket 224 fills the gap between the connecting slot 223 and the manhole cylinder and steel membrane, forming a sealing barrier to prevent the roadbed from softening due to rainwater infiltration; at the same time, the concrete layer 213 and the manhole base 221 are poured as a whole, so that the manhole cylinder, steel membrane and manhole base 221 form a rigid whole, the vertical bearing capacity is improved, and it can resist the sinking of the manhole base 221 caused by long-term vehicle load.

[0036] Specifically, the pre-embedded reinforcing steel bar 222 is fixedly connected to the inner bottom wall of the well base 221, and the well base 221 is fixedly connected to the interior of the inspection well foundation through the pre-embedded reinforcing steel bar 222.

[0037] The effect achieved by the above components is as follows: one end of the pre-embedded reinforcing steel bar 222 is embedded in the manhole base 221, and the other end is inserted into the foundation. An anchoring structure is formed by secondary concrete pouring, which improves the connection strength between the manhole base 221 and the foundation, restricts the horizontal displacement of the manhole base 221, resists the lateral load of the vehicle, and prevents the manhole base 221 from shifting, thereby improving the overall stability of the structure and avoiding misalignment between the manhole cover 37 and the road surface due to the shift.

[0038] Specifically, the anti-deviation manhole cover installation mechanism 3 includes a manhole base 31 fixedly connected to the top of the steel plate 215, an annular support platform 32 fixedly connected to the top of the manhole base 31, multiple side reinforcing plates 33 fixedly connected at equal intervals on the outer surface of the annular support platform 32, and a lifting ring 34 fixedly connected to the top of the manhole base 31.

[0039] The effects achieved by the above components are as follows: the manhole base 31 is fixed to the top of the steel plate 215 by epoxy resin adhesive to form an upper load-bearing foundation; the annular support platform 32 increases the support area of ​​the manhole cover 37 and avoids local deformation of the manhole cover 37 under stress; the side reinforcing plate 33 disperses the force of vehicle impact load on the manhole base 31, improves the impact resistance of the manhole base 31 and avoids cracking of the manhole base 31; the lifting ring 34 is flush with the road surface, eliminates the height difference of the road surface around the manhole, improves driving comfort, and at the same time protects the manhole base 31 from mechanical damage during the asphalt paving process.

[0040] Specifically, the outer surface of the well ring 34 is fixedly connected with a limiting frame 35 at equal intervals, the inner wall of the well ring 34 is fitted with a waterproof sealing gasket 36, the inside of the well ring 34 is fitted with a well cover 37, the outer surface of the well cover 37 is fitted into the inside of the limiting frame 35, the outer surface of the well cover 37 is threaded with an anti-deviation limiting screw 38 at equal intervals, and the well cover 37 is threaded into the inside of the well ring 34 through the anti-deviation limiting screw 38.

[0041] The effects achieved by the above components are as follows: the limiting frame 35 forms an initial horizontal limit on the manhole cover 37 to prevent the manhole cover 37 from shifting laterally; the anti-deviation limiting screw 38 tightens against the inner wall of the lifting ring 34 to further lock the position of the manhole cover 37, thereby reducing the coaxiality deviation between the manhole cover 37 and the well shaft and avoiding wheel jamming caused by the deviation of the traditional manhole cover 37; the waterproof sealing gasket 36 fills the gap between the manhole cover 37 and the lifting ring 34 to prevent rainwater from seeping into the well and corroding the pipeline, and can withstand repeated crushing by heavy trucks.

[0042] Working principle: First, the well base 221 is placed on top of the inspection well foundation. Through the pre-embedded reinforcing steel bar 222 and the secondary concrete pouring of the foundation, the well base 221 and the foundation form a rigid anchoring structure, providing a stable benchmark for the subsequent installation of components. At the same time, a sealing and leak-proof gasket 224 is installed in the connecting hole groove 223 to ensure that there is no leakage during the subsequent concrete pouring.

[0043] The precast well shaft 1 is hoisted into the inner groove of the connecting hole slot 223, and the precast steel membrane 211 is hoisted into the outer groove. The position of the steel membrane is adjusted by the lifting ring 219 to ensure that the well shaft and the steel membrane are coaxial. Then, concrete is poured into the gap between the well shaft and the steel membrane to form a concrete layer 213. During this process, the vertical reinforcing ribs 212 and the horizontal reinforcing ribs 217 enhance the rigidity of the steel membrane and prevent the steel membrane from deforming, which would cause uneven thickness of the concrete layer 213. After the concrete has cured for 1 day, a rigid load-bearing system of well shaft, concrete and steel membrane is formed, which can withstand the upper load and vehicle impact.

[0044] A steel plate 215 is installed on top of the precast steel membrane 211. A horizontal adjusting bolt 216 is inserted through the threaded hole 214, and the bolt is rotated to adjust the levelness of the steel plate 215 so that the top surface of the steel plate 215 is flush with the designed asphalt pavement elevation. After adjustment, the bolt is locked, and the steel plate 215 forms a horizontal load-bearing surface, providing a flat reference for the installation of the manhole base 31. The manhole base 31 is fixed to the top of the steel plate 215 with epoxy resin adhesive. The annular support platform 32 and the side reinforcing plate 33 enhance the load-bearing capacity of the manhole base 31. The lifting ring 34 is installed on top of the manhole base 31 and laid synchronously with the asphalt surface layer to ensure that the lifting ring 34 is flush with the road surface. Finally, the manhole cover 37 is installed. It is initially positioned by the limiting frame 35, and the anti-deviation limiting screw 38 is tightened against the inner wall of the lifting ring 34 to lock the position of the manhole cover 37. The waterproof sealing gasket 36 seals the gap, completing the entire lifting construction.

[0045] During operation, the vehicle load is transferred from the manhole cover 37 to the manhole base 31, then distributed to the concrete layer 213 via the steel plate 215 and the horizontal adjusting bolt 216, and then transferred from the concrete layer 213 to the precast manhole cylinder 1 and the manhole base 221. Finally, it is transferred to the foundation via the pre-embedded reinforcing steel bar 222, forming a complete load transfer path. At the same time, the anti-deviation limiting screw 38 and the limiting frame 35 prevent the manhole cover 37 from shifting, and the waterproof sealing gasket 36 and the sealing leak-proof gasket 224 prevent rainwater from seeping in, ensuring the long-term stable use of the structure.

Claims

1. A construction structure for raising an asphalt pavement manhole, comprising a precast manhole casing (1), an adjustable formwork lifting mechanism (2), and an anti-deviation manhole cover installation mechanism (3), characterized in that: The prefabricated well shaft (1) is located inside the adjustable hoisting mechanism (2), the anti-deviation well cover installation mechanism (3) is located on top of the adjustable hoisting mechanism (2), and the inner diameter of the prefabricated well shaft (1) is consistent with the design inner diameter of the inspection well. The adjustable formwork mechanism (2) includes a steel membrane support assembly (21) and a bottom support assembly (22). The steel membrane support assembly (21) includes a precast steel membrane (211) and vertical reinforcing ribs (212). The bottom support assembly (22) includes a well base (221) and embedded reinforcing bars (222). The precast well shaft (1) is located inside the precast steel membrane (211). The outer surface of the precast well shaft (1) and the inner surface of the precast steel membrane (211) are filled with a concrete layer (213). The top of the precast steel membrane (211) is provided with multiple connecting threaded holes (214) along the circumferential direction. The top of the precast steel membrane (211) is threaded with a steel plate (215). The internal threads of the connecting threaded holes (214) are threaded with horizontal adjusting bolts (216). The steel plate (215) is threaded to the top of the precast steel membrane (211) through the horizontal adjusting bolts (216).

2. The construction structure for raising asphalt pavement manholes according to claim 1, characterized in that: The vertical reinforcing ribs (212) are evenly spaced along the height direction of the outer wall of the precast steel membrane (211), and the transverse reinforcing ribs (217) are welded to the outer surface along the circumferential direction of the precast steel membrane (211).

3. The construction structure for raising asphalt pavement manholes according to claim 2, characterized in that: Fasteners (218) are welded to the connection and fixing points of the transverse reinforcing ribs (217) and the vertical reinforcing ribs (212), and lifting rings (219) are fixedly connected at equal intervals along the circumferential direction on the outer surface of the top of the precast steel membrane (211).

4. The construction structure for raising asphalt pavement manholes according to claim 1, characterized in that: The well base (221) is fixedly connected to the bottom of the precast well cylinder (1) and the precast steel membrane (211). The well base (221) is provided with a connecting groove (223). A sealing gasket (224) is inserted into the connecting groove (223). The precast well cylinder (1) and the precast steel membrane (211) are inserted into the connecting groove (223). The precast well cylinder (1) and the precast steel membrane (211) are fixedly connected to the inside of the well base (221) through a concrete layer (213).

5. The construction structure for raising asphalt pavement manholes according to claim 1, characterized in that: The pre-embedded reinforcing steel bar (222) is fixedly connected to the inner bottom wall of the well base (221), and the well base (221) is fixedly connected to the interior of the inspection well foundation through the pre-embedded reinforcing steel bar (222).

6. The construction structure for raising asphalt pavement manholes according to claim 1, characterized in that: The anti-deviation manhole cover installation mechanism (3) includes a manhole base (31) fixedly connected to the top of the steel plate (215), an annular support platform (32) fixedly connected to the top of the manhole base (31), a plurality of side reinforcing plates (33) fixedly connected at equal intervals on the outer surface of the annular support platform (32), and a lifting ring (34) fixedly connected to the top of the manhole base (31).

7. The construction structure for raising asphalt pavement manholes according to claim 6, characterized in that: The outer surface of the lifting ring (34) is fixedly connected with a limiting frame (35) at equal intervals. A waterproof sealing gasket (36) is snapped into the inner wall of the lifting ring (34). A well cover (37) is snapped into the inside of the lifting ring (34). The outer surface of the well cover (37) is snapped into the inside of the limiting frame (35). An anti-deviation limiting screw (38) is threadedly connected to the outer surface of the well cover (37) at equal intervals. The well cover (37) is threaded into the inside of the lifting ring (34) through the anti-deviation limiting screw (38).

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