Wellhead reinforcing structure of inspection well in municipal drainage engineering

Abstract

The utility model provides an inspection well mouth reinforcing structure in municipal drainage engineering, which comprises a shaft arranged in a graded sandstone cushion layer and a road base layer and a well cover arranged in an asphalt concrete surface layer, and cast-in-place reinforced concrete reinforcing cover plates are arranged on the upper portion of the shaft and in the road base layer. A colored steel fiber concrete filling area is arranged on the upper portion of the cast-in-place reinforced concrete reinforcing cover plate and connected with the asphalt concrete surface layer, and the top face of the colored steel fiber concrete filling area is flush with the asphalt concrete surface layer and the surface of the well lid. The utility model effectively improves the structural strength and shock resistance of the wellhead of the inspection well, prolongs the service life of the wellhead, effectively reduces the daily maintenance and updating cost, and is practical, simple and easy to construct.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal road drainage engineering construction, in particular to a manhole wellhead reinforcement structure in a municipal drainage engineering. Background Art

[0002] In recent years, during the construction of inspection wells, the road surface around the well mouths of various inspection wells is prone to settlement, cracking, damage, loosening, well ring damage and other diseases, which seriously affects the driving safety and comfort. It also affects the appearance of the road surface and the image of the city. In order to further improve the construction quality of inspection wells in municipal drainage projects and alleviate the common quality problems such as settlement, cracks, and damage of the road surface around the wells, this inspection well mouth reinforcement structure is specially studied. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a manhole reinforcement structure in a municipal drainage project, which can effectively improve the structural strength, impact resistance and service life of the manhole, effectively reduce the cost of daily maintenance and renewal, and is practical, simple and easy to construct.

[0004] The technical solution provided by the utility model is: a reinforcing structure for the manhole opening of an inspection well in a municipal drainage project, comprising a manhole arranged in a graded sand and gravel cushion layer and a road base layer, and a manhole cover arranged in an asphalt concrete surface layer, a cast-in-place reinforced concrete reinforcement cover plate is arranged on the upper part of the manhole and in the road base layer, a colored steel fiber concrete filling area is arranged on the upper part of the cast-in-place reinforced concrete reinforcement cover plate, the colored steel fiber concrete filling area is connected to the asphalt concrete surface layer, the top surface of the colored steel fiber concrete filling area is flush with the asphalt concrete surface layer and the surface of the manhole cover, and a leveling steel plate is arranged on the upper part of the cast-in-place reinforced concrete reinforcement cover plate.

[0005] Furthermore, the cast-in-place reinforced concrete reinforcement cover plate includes a double-layer bidirectional steel mesh surrounding the wellbore, the double-layer bidirectional steel mesh is provided with upper and lower layers of reinforcing steel bars at the wellhead, a circular shaped steel inner formwork is provided on the inner side of the wellbore, and the outer side of the circular shaped steel inner formwork is tightened with tensioning screws.

[0006] Furthermore, the cast-in-place reinforced concrete reinforcement cover plate is formed by pouring concrete with a double-layer bidirectional steel mesh, upper and lower layers of reinforcing steel bars at the wellhead, a circular shaped steel inner formwork and tensioning fastening screws, and the embedded bolts are fixed before pouring.

[0007] Furthermore, the embedded bolts are welded and fixed on the double-layer steel mesh before pouring the cast-in-place reinforced concrete reinforcement cover plate. The number of embedded bolts is 8, the model specification is φ20 bolts, and the bolt embedding depth is not less than 200mm.

[0008] The double-layer bidirectional steel mesh is made of φ12 steel bars arranged at equal intervals, with the spacing of steel bars in the same row being 18 cm, and the spacing of steel bars in the upper and lower layers being 15 cm; the upper and lower layers of reinforcing steel bars at the wellhead are φ12 steel bars arranged in two rows in a circular shape, with the upper and lower layers arranged symmetrically, with the spacing of steel bars in the same row being 18 cm, and the spacing of steel bars in the upper and lower layers being 15 cm.

[0009] Furthermore, the circular shaped steel inner template has a thickness of 5 mm and an outer diameter that is the inner diameter of the inspection well.

[0010] Furthermore, the leveling steel plate is 5mm-10mm thick, the size of the steel plate is 60mm×80mm, holes are reserved on the steel plate, and it is fixed with 8 bolts with a diameter of 20mm, and the gaps are filled with C30 fine stone concrete.

[0011] Furthermore, the graded sand and gravel cushion layer is located on the outer peripheral side of the wellbore, has a compaction coefficient of not less than 0.95, and is compacted by rolling; the road base is located on the outer peripheral side of the wellbore and on the upper part of the graded sand and gravel cushion layer, is formed by layered compaction of cement-stabilized crushed stone, and has a compaction coefficient of not less than 0.95.

[0012] Furthermore, the asphalt concrete surface layer is located on the road base and the upper part of the cast-in-place reinforced concrete cover plate, and is compacted by layered rolling; the colored steel fiber concrete filling area is located around the manhole cover and the upper part of the cast-in-place reinforced concrete cover plate, and the colored steel fiber concrete filling area is consistent with the color of the surrounding roads.

[0013] Beneficial effects of the utility model:

[0014] (1) After the cast-in-place reinforced concrete reinforced cover is poured and maintained, a leveling steel plate is installed on it to ensure that the top of the manhole cover is flush with the road surface;

[0015] (2) A circular steel inner template is set on the inside of the wellbore, which is fastened with tensioning screws to prevent the mold from running and expanding during concrete pouring. At the same time, the double-layer bidirectional steel mesh on the outside of the wellbore and the upper and lower layers of reinforcing steel bars at the wellhead ensure the support strength of the wellhead, effectively improve the structural strength and impact resistance of the inspection wellhead and the service life of the wellhead, and effectively reduce the cost of daily maintenance and renewal;

[0016] (3) Colored steel fiber concrete filling areas are set around the manhole cover and on the upper part of the cast-in-place reinforced concrete cover plate, which effectively improves the strength and overall stability of the road surface around the inspection well, increases the bearing capacity of the road surface around the inspection well, and effectively prevents damage, subsidence, and cracking of the road surface around the inspection well mouth, effectively improving the driving safety and comfort of the road surface around the inspection well. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic cross-sectional view of the inspection well reinforcement structure of the utility model.

[0018] Figure 2 It is a plan view of the steel bars of the cast-in-place reinforced concrete reinforcement cover plate in the utility model.

[0019] Figure 3 It is a plan view of the inspection well reinforcement structure of the utility model.

[0020] Figure 4 It is a cross-sectional schematic diagram of the reinforcement of the cast-in-situ reinforced concrete reinforcement cover plate in the utility model.

[0021] In the figure: 1. Graded sand and gravel cushion layer; 2. Road base layer; 3. Wellbore; 4. Asphalt concrete surface layer; 5. Well cover; 6. Cast-in-place reinforced concrete reinforcement cover plate; 7. Colored steel fiber concrete filling area; 8. Leveling steel plate; 9. Embedded bolts; 10. Double-layer bidirectional steel mesh; 11. Upper and lower reinforcing steel bars at the wellhead; 12. Circular shaped steel inner formwork; 13. Tensioning screws. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and should not be understood as limiting the present invention. In order to better illustrate the specific implementation methods of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific implementation methods of the present invention, all other specific implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "front", "rear", "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-4 The shown structure is a reinforcement structure for the manhole mouth of an inspection well in a municipal drainage project, comprising a manhole 3 arranged in a graded sand and gravel cushion layer 1 and a road base layer 2, and a manhole cover 5 arranged in an asphalt concrete surface layer 4, wherein a cast-in-place reinforced concrete reinforcement cover plate 6 is arranged on the upper part of the manhole 3 and in the road base layer 2, a colored steel fiber concrete filling area 7 is arranged on the upper part of the cast-in-place reinforced concrete reinforcement cover plate 6, the colored steel fiber concrete filling area 7 is connected to the asphalt concrete surface layer 4, the top surface of the colored steel fiber concrete filling area 7 is flush with the surface of the asphalt concrete surface layer 4 and the manhole cover 5, and a leveling steel plate 8 is arranged on the upper part of the cast-in-place reinforced concrete reinforcement cover plate 6.

[0026] The cast-in-place reinforced concrete reinforcement cover plate 6 includes a double-layer bidirectional steel mesh 10 surrounding the shaft 3, on which upper and lower layers of wellhead reinforcing steel bars 11 are arranged, and a circular shaped steel inner formwork 12 is arranged on the inner side of the shaft 3. The outer side of the circular shaped steel inner formwork 12 is fastened with tensioning screws 13 to prevent the formwork from running away and expanding during the concrete pouring process.

[0027] The cast-in-place reinforced concrete reinforcement cover plate 6 is formed by pouring concrete with double-layer bidirectional steel mesh 10, upper and lower reinforcing steel bars 11 at the wellhead, circular shaped steel inner formwork 12 and tensioning fastening screws 13, and the embedded bolts 9 are fixed before pouring.

[0028] The embedded bolts 9 are welded and fixed on the double-layer bidirectional steel mesh 10 before pouring the cast-in-place reinforced concrete reinforcement cover plate 6. The number of embedded bolts 9 is 8, the model specification is φ20 bolts, and the bolt embedding depth is not less than 200mm.

[0029] The double-layer bidirectional steel mesh 10 is made of φ12 steel bars arranged at equal intervals, with the spacing of the same row of steel bars being 18 cm, and the spacing of the upper and lower layers of steel bars being 15 cm; the upper and lower layers of reinforcing steel bars 11 at the wellhead are φ12 steel bars arranged in two rows in a circular pattern, with the upper and lower layers arranged symmetrically, with the spacing of the same row of steel bars being 18 cm, and the spacing of the upper and lower layers of steel bars being 15 cm. The circular shaped steel inner template 12 is 5 mm thick, and its outer diameter is the inner diameter of the inspection well.

[0030] After the cast-in-place reinforced concrete reinforcement cover 6 is poured and cured, a leveling steel plate 8 is installed on it to ensure that the top of the manhole cover 5 is flush with the road surface. The leveling steel plate 8 is 5mm-10mm thick and has a size of 60mm×80mm. Holes are reserved on the steel plate and fixed with 8 bolts with a diameter of 20mm. The gaps are filled with C30 fine stone concrete.

[0031] The graded gravel cushion layer 1 is located on the outer peripheral side of the shaft 3, with a compaction coefficient of not less than 0.95, and is compacted by rolling; the road base 2 is located on the outer peripheral side of the shaft 3 and on the upper part of the graded gravel cushion layer 1, and is formed by layered rolling and compaction of cement-stabilized crushed stone, with a compaction coefficient of not less than 0.95. The asphalt concrete surface layer 4 is located on the upper part of the road base 2 and the cast-in-place reinforced concrete reinforcement cover plate 6, and is formed by layered rolling and compaction; the colored steel fiber concrete filling area 7 is located around the shaft cover 5 and on the upper part of the cast-in-place reinforced concrete reinforcement cover plate 6, and the colored steel fiber concrete filling area 7 is consistent with the color of the surrounding roads. The amount of steel fiber added (the proportion of the total weight of concrete) and the amount of iron black added (the proportion of cementitious materials) are adjusted according to the concrete trial mix results, and compacted by rolling with compaction equipment.

[0032] The wellhead reinforcement part of the utility model includes a graded crushed stone cushion layer 1, a road base layer 2, an asphalt concrete surface layer 4, a cast-in-place reinforced concrete reinforcement cover plate 6 and a colored steel fiber concrete filling area 7, wherein the graded crushed stone cushion layer 1 is arranged at the lowest layer around the well; the road base layer 2 is arranged on the side around the wellbore, above the graded crushed stone cushion layer 1; the asphalt concrete surface layer 4 is arranged on the outside of the wellbore and on the road base layer 2, and a cast-in-place reinforced concrete reinforcement cover plate 6 is arranged between the road base layer 2 and the asphalt concrete surface layer 4 and above the wellbore 3.

[0033] When reinforcing the wellhead, first backfill the graded sand and gravel at the bottom of the road base around the inspection well shaft, backfill and compact around the well shaft, arrange a double-layer bidirectional steel mesh on the outside of the well shaft, and add reinforcing steel bars to the upper and lower layers of the wellhead. After the steel bars are tied and installed, use tension bolts to firmly fix the circular steel inner formwork set on the inside of the well shaft. Install the embedded bolts before pouring, and then pour concrete. After the reinforced concrete reinforced cover plate is maintained, install the leveling steel plate on it to ensure that the top surface of the well cover is flush with the road surface, and then pour the colored steel fiber concrete filling area and asphalt concrete surface layer to make the color of the colored steel fiber concrete filling area consistent with the color of the surrounding roads.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reinforcing structure for a manhole in a municipal drainage project, characterized in that: The invention comprises a shaft (3) arranged in a graded gravel cushion layer (1) and a road base layer (2), and a shaft cover (5) arranged in an asphalt concrete surface layer (4); a cast-in-place reinforced concrete reinforcement cover plate (6) is arranged on the upper part of the shaft (3) and in the road base layer (2); a colored steel fiber concrete filling area (7) is arranged on the upper part of the cast-in-place reinforced concrete reinforcement cover plate (6); the colored steel fiber concrete filling area (7) is connected to the asphalt concrete surface layer (4); the top surface of the colored steel fiber concrete filling area (7) is flush with the surface of the asphalt concrete surface layer (4) and the shaft cover (5); and a leveling steel plate (8) is arranged on the upper part of the cast-in-place reinforced concrete reinforcement cover plate (6).

2. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 1, characterized in that: The cast-in-place reinforced concrete reinforcement cover plate (6) comprises a double-layer bidirectional steel mesh (10) surrounding the shaft (3), the double-layer bidirectional steel mesh (10) being provided with upper and lower layers of wellhead reinforcing steel bars (11), a circular shaped steel inner template (12) being provided inside the shaft (3), and the outer side of the circular shaped steel inner template (12) being fastened by tensioning screws (13).

3. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 2, characterized in that: The cast-in-place reinforced concrete reinforcement cover plate (6) is formed by pouring concrete with a double-layer bidirectional steel mesh (10), upper and lower reinforcing steel bars (11) at the wellhead, a circular shaped steel inner template (12) and tensioning screws (13), and the embedded bolts (9) are fixed before pouring.

4. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 3, characterized in that: The embedded bolts (9) are welded and fixed on the double-layer bidirectional steel mesh (10) before pouring the cast-in-place reinforced concrete reinforcement cover plate (6). The number of embedded bolts (9) is 8, the model specification is φ20 bolts, and the bolt embedding depth is not less than 200 mm.

5. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 2, characterized in that: The double-layer bidirectional steel mesh (10) is made of φ12 steel bars arranged at equal intervals, with the spacing of the steel bars in the same row being 18 cm, and the spacing of the steel bars in the upper and lower layers being 15 cm; the upper and lower layers of reinforcing steel bars (11) at the wellhead are φ12 steel bars arranged in two rows in a circular pattern, with the upper and lower layers arranged symmetrically, with the spacing of the steel bars in the same row being 18 cm, and the spacing of the steel bars in the upper and lower layers being 15 cm.

6. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 2, characterized in that: The circular shaped steel inner template (12) has a thickness of 5 mm and an outer diameter equal to the inner diameter of the inspection well.

7. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 1, characterized in that: The leveling steel plate (8) is 5mm-10mm thick and has a size of 60mm×80mm. Holes are reserved on the steel plate and fixed with 8 bolts with a diameter of 20mm. The gaps are filled with C30 fine stone concrete.

8. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 1, characterized in that: The graded gravel cushion layer (1) is located on the outer peripheral side of the shaft (3), has a compaction coefficient of not less than 0.95, and is compacted by rolling; the road base layer (2) is located on the outer peripheral side of the shaft (3) and on the upper part of the graded gravel cushion layer (1), is formed by layered compaction of cement-stabilized crushed stone, and has a compaction coefficient of not less than 0.

95.

9. The inspection wellhead reinforcement structure in a municipal drainage project according to claim 1, characterized in that: The asphalt concrete surface layer (4) is located on the road base (2) and the upper part of the cast-in-place reinforced concrete reinforcement cover plate (6), and is formed by layered rolling and compaction; the colored steel fiber concrete filling area (7) is located around the manhole cover (5) and the upper part of the cast-in-place reinforced concrete reinforcement cover plate (6), and the colored steel fiber concrete filling area (7) is consistent with the color of the surrounding road.

Images