CN115030224A

CN115030224A - Municipal road inspection well and construction method thereof

Info

Publication number: CN115030224A
Application number: CN202210707875.XA
Authority: CN
Inventors: 刘建忠; 马金辉; 梅玉兴; 王波; 李卫江; 王雷
Original assignee: Qingdao Zhongrun Public Utilities Design Co ltd
Current assignee: Qingdao Zhongrun Public Utilities Design Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-09-09

Abstract

The invention discloses a municipal road inspection well and a construction method thereof. The invention adopts the reinforced concrete bearing plate, changes the influence of road surface load on the deformation of the inspection well, enlarges the load bearing area from the cover seat, disperses the concentrated stress of the well cover by the reinforced concrete integral bearing plate, utilizes the roadbed to reduce the impact pressure of the driving of the shaft, shares the bearing by the surrounding roadbed structure, and does not directly bear the force by the shaft independently, thereby buffering the impact load of the vehicle, solving the problem of the falling off of asphalt fragments, and overcoming the phenomena of local sinking and upwrapping caused by uneven settlement at the periphery of the well periphery; by adopting the post-excavation construction method, the problem that the elevation of the conventional inspection well is generally lower than the surrounding pavement to cause vehicle jumping is solved, the problems of labor stealing and material reduction and hollowness in the cushion lifting process of the inspection well are solved, and the problem of traffic flow regulation is solved.

Description

Municipal road inspection well and construction method thereof

Technical Field

The invention relates to the technical field of road construction, in particular to a municipal road inspection well and a construction method thereof.

Background

In recent years, with the rapid development of the economy of China, the car purchasing rate of residents is greatly improved, and driving instead of walking becomes a main traffic mode of daily life of most urban residents. However, various well lids appearing on municipal roads are unstable and broken, the well is sunk, and the road surface is cracked and broken, which causes sense organ discomfort such as abnormal sound, vibration, vehicle jumping and even traffic accidents, not only affects the beauty of the roads, but also brings potential safety hazards to people going out.

At present, the method of the Qingdao urban road well lid according to the technical guide of Qingdao urban road inspection well is shown in FIG. 17, and the main problems of the scheme are as follows: the 6cm asphalt layer is a flexible pavement and has no constraint effect on the well cover; the well ring is 15cm in thickness, only the remaining 9cm is embedded in the concrete layer (if the minimum required thickness of the manhole cover is 10cm according to the national standard GBT-23858-; the plain concrete has poor integrity and durability, and is easy to crack and fall blocks; the 6cm asphalt layer and the bottom concrete can not be firmly combined, the asphalt layer is gradually stripped from the bottom due to the difference of thermal expansion coefficients in winter and summer, and the height difference of the well cover is directly exposed; the fixed steel bars in the strip-shaped seam of the well ring are hinged and non-fixedly connected, so that the well ring cannot be locked.

Because above combination reason, along with the time extension of leading to the bus, vehicle impact load direct action all has the bounce here on the peripheral well lid of surpassing, and this vibration load's reciprocal impact, fixed reinforcing bar on the well lid is not hard up, and the well lid activity gradually appears, has further aggravated the destructive action.

Disclosure of Invention

The invention aims to provide a municipal road inspection well and a construction method thereof, which aim to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a town road inspection shaft, includes concrete shaft, grey soil layer and pitch layer, concrete shaft top is equipped with heavy cast iron well lid, grey soil layer top is located to the pitch layer, be equipped with the reinforced concrete loading board between pitch layer and the heavy cast iron well lid, be equipped with concrete layer between grey soil layer and the concrete shaft.

Further, the bottom of the concrete shaft is provided with a well chamber cover plate, the top of the well chamber cover plate is flush with the roadbed, and the top of the roadbed is provided with the lime-soil layer.

Further, the well seat of the heavy cast iron well lid is fixedly connected with the top of the concrete well barrel, the bottom of the reinforced concrete bearing plate extends to the inner side of the gray soil layer, and the joint of the well seat and the concrete well barrel is positioned inside the reinforced concrete bearing plate.

Further, heavy cast iron well lid top and reinforced concrete loading board top parallel and level, reinforced concrete loading board top and pitch layer top parallel and level.

Furthermore, a bi-component premixed anti-slip material coating is arranged on the top of the reinforced concrete bearing plate and extends to the top of the asphalt layer.

Furthermore, the bi-component premixed anti-slip material coating is prepared by brushing and drying a methyl methacrylate bi-component material.

The invention also comprises a construction method of the municipal road inspection well, which comprises the following construction steps:

step one, leveling and rolling the roadbed: sealing the opening of the cover plate of the well chamber by using a construction plate, and then leveling and rolling the roadbed;

step (II), lime soil laying: laying the lime soil above the roadbed, and compacting;

step three, excavating a well mouth in the lime soil maintenance period: digging out the lime soil above the well chamber cover plate to form a well mouth;

step (IV), installing a well seat and a well cover in the lime soil maintenance period: building a shaft in a wellhead by using a shaft adjusting block, then installing a shaft seat and a shaft cover on the top of the shaft, and filling concrete between the shaft and the lime soil;

step (V), paving asphalt on the road surface: paving asphalt above the lime soil;

step six, excavation of a bearing plate foundation pit: excavating asphalt, concrete and lime soil on the periphery of the well base to form a bearing plate foundation pit;

step seven, concrete pouring of the bearing plate, installation of the well seat and the well lid, wherein the height of the well shaft is adjusted by using a well shaft adjusting block, so that the well lid is flush with the top of the asphalt, reinforcing steel bars are laid inside the bearing plate foundation pit, then pouring is carried out, a reinforced concrete bearing plate is formed outside the well shaft and the well seat, and the top of the reinforced concrete bearing plate is flush with the top of the asphalt;

step (eight), painting the bi-component premixed anti-skid material: and (3) coating the top of the reinforced concrete bearing plate and the top of the joint of the reinforced concrete bearing plate and the asphalt with a bi-component premixed anti-slip material, and drying to complete the construction operation of the newly-built inspection well.

Further, in the step (five), the well seat is isolated when asphalt is paved; in the step (VI), the bottom of the bearing plate foundation pit is positioned below the well seat; and (seventhly), pouring the joints of the reinforced concrete bearing plates and the asphalt by adopting quick-cracking spraying type cation emulsified asphalt.

Furthermore, during concrete curing, a plastic film, geotextile and a steel plate are sequentially paved above the reinforced concrete bearing plate, the steel plate penetrates through asphalt through anchor bars and is inserted into the grey soil, an annular rubber mat is arranged between the steel plate and the top of the asphalt, and asphalt concrete is paved on the periphery of the steel plate to find a slope.

Further, the construction steps of modifying and maintaining the inspection well are as follows:

s1, excavating the asphalt pavement outside the inspection well, forming a foundation pit outside the shaft, and extending the bottom of the foundation pit to the upper part of the well chamber cover plate;

s2, backfilling the bottom of the foundation pit by using graded broken stones, and carrying out layering compaction;

s3, paving steel bars above the interior of the foundation pit, filling concrete, forming a reinforced concrete bearing plate on the periphery of the shaft, wherein the top of the reinforced concrete bearing plate is flush with the top of the well lid and the top of the asphalt.

Compared with the prior art, the invention has the following beneficial effects:

1. the reinforced concrete bearing plate is adopted, so that the deformation influence of road surface load on the inspection well is changed, the load bearing area from the cover seat is enlarged, the integral reinforced concrete bearing plate disperses the concentrated stress of the well cover, the impact pressure of a shaft travelling crane is reduced by using the roadbed, the bearing is shared by the surrounding roadbed structure, and the direct stress of the shaft is not exerted independently, so that the impact load of a vehicle is buffered, and the problem of falling off of asphalt fragments is solved; the reinforced concrete slab material is adopted, so that the phenomena of asphalt crack, delamination, cracking and falling off around the walling crib are overcome; the rigid integral bearing plate is adopted, so that the phenomena of local sinking and encumbrance caused by uneven settlement at the periphery of the well periphery are overcome; the road traffic anti-skid coating is coated with a 1.5mm thick bi-component premixed anti-skid material, so that the problem of attractive vision of road traffic is solved.

2. The invention adopts a post-excavation construction method, changes the current habitual construction sequence, and carries out the excavation work of the bearing plate foundation pit after the pavement asphalt paving is finished, thereby solving the problem of vehicle jumping caused by the fact that the elevation of the current inspection well is generally lower than the peripheral pavement, solving the ubiquitous problem of 'pavement waves' caused by inaccurate control of the elevation of the inspection well and poor control of the flatness of a paver, solving the problem of unavailable tamping of the periphery of the inspection well, solving the problems of support, work stealing, material reduction and hollowness in the cushion lifting process of the inspection well and solving the problem of traffic flow regulation; steel plates are adopted for protection and rapid traffic, traffic passing and maintenance are synchronous, and the construction period is shortened by changing phases; the main control indexes for manufacturing the well lid and the well ring are strengthened, and the problem of entering low-grade well lid products is solved; a set of new design scheme and construction method are provided for newly building and maintaining the inspection well in a new area.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a sectional view of the upper portion of a newly constructed manhole in accordance with the present invention;

FIG. 2 is a cross-sectional view of the upper portion of the manhole in a retrofit, service or inspection configuration of the present invention;

FIG. 3 is a cross-sectional view of the first construction step of the present invention;

FIG. 4 is a sectional view of the construction step (II) of the present invention;

FIG. 5 is a sectional view of the construction step (III) of the present invention;

FIG. 6 is a cross-sectional view of the present invention at construction step (IV);

FIG. 7 is a sectional view showing the construction step (V) of the present invention;

FIG. 8 is a sectional view of the construction step (VI) of the present invention;

FIG. 9 is a sectional view showing the construction step (VII) of the present invention;

FIG. 10 is a sectional view showing the construction step (eight) of the present invention;

FIG. 11 is a schematic plan view of the steel plate protection of the present invention;

FIG. 12 is a schematic protective cross-section of a steel plate according to the present invention;

FIG. 13 is a plan view of the circular well lid and the square well lid of the bearing plate of the present invention;

FIG. 14 is a structural reinforcement arrangement diagram of the round well lid and the square well lid of the bearing plate of the invention;

FIG. 15 is a plan view of the circular and square well lids of the loading plate according to the present invention;

FIG. 16 is a reference view of the load bearing standard of the heavy cast iron well lid of the present invention;

FIG. 17 is a view of the inspection well (above the cover plate) of the lane of the Qingdao urban road;

in the figure: 1. a concrete wellbore; 2. a gray soil layer; 3. an asphalt layer; 4. heavy cast iron well covers; 5. a reinforced concrete bearing plate; 6. a concrete layer; 7. well room apron.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-17, the present invention provides a technical solution: a municipal road inspection well comprises a concrete well barrel 1, a grey soil layer 2 and an asphalt layer 3, wherein a heavy cast iron well lid 4 is arranged at the top of the concrete well barrel 1, the asphalt layer 3 is arranged at the top of the grey soil layer 2, a reinforced concrete bearing plate 5 is arranged between the asphalt layer 3 and the heavy cast iron well lid 4, and a concrete layer 6 is arranged between the grey soil layer 2 and the concrete well barrel 1; a well chamber cover plate 7 is arranged at the bottom of the concrete well barrel 1, the top of the well chamber cover plate 7 is flush with the roadbed, and the lime soil layer 2 is arranged at the top of the roadbed; the well seat of the heavy cast iron well lid 4 is fixedly connected with the top of the concrete well barrel 1, the bottom of the reinforced concrete bearing plate 5 extends to the inner side of the gray soil layer 2, and the joint of the well seat and the concrete well barrel 1 is positioned in the reinforced concrete bearing plate 5; the top of the heavy cast iron well lid 4 is flush with the top of the reinforced concrete bearing plate 5, and the top of the reinforced concrete bearing plate 5 is flush with the top of the asphalt layer 3; the top of the reinforced concrete bearing plate 5 is coated with methyl methacrylate two-component materials and dried to form a two-component premixed anti-slip material coating, and the two-component premixed anti-slip material coating extends to the top of the asphalt layer 3.

step (II), lime soil laying: laying the lime soil above the roadbed, and compacting to form a lime soil layer 2;

step three, excavating a well mouth in the lime soil maintenance period: digging out the lime soil above the well chamber cover plate 7 to form a well mouth;

step (IV), installing a well seat and a well cover in the lime soil maintenance period: piling a shaft by using a shaft adjusting block in a well mouth to form a shaft, then installing a heavy cast iron well cover 4 and a well seat on the top of the shaft, and filling concrete between the shaft and the gray soil;

step (V), paving asphalt on the road surface: paving asphalt above the lime soil, and isolating the well seat to form an asphalt layer 3 when paving the asphalt;

step six, excavation of a bearing plate foundation pit: excavating asphalt, concrete and lime soil on the periphery of the well base to form a bearing plate foundation pit, wherein the bottom of the bearing plate foundation pit is positioned below the well base;

step seven, carrying plate concrete pouring, well seat and well cover installation, wherein a well shaft adjusting block is used for adjusting the height of the well shaft to form a concrete well cylinder 1, so that the heavy cast iron well cover 4 is flush with the top of asphalt, reinforcing steel bars are laid in a bearing plate foundation pit, then C40 concrete is poured, a reinforced concrete bearing plate 5 is formed outside the well shaft and the well seat, the top of the reinforced concrete bearing plate 5 is flush with the top of an asphalt layer 3, and the joint of the reinforced concrete bearing plate 5 and the asphalt layer 3 is grouted by fast-cracking spraying type cationic emulsified asphalt;

step (eight), painting the bi-component premixed anti-skid material: and (3) coating the top of the reinforced concrete bearing plate 5 and the top of the joint of the reinforced concrete bearing plate and the asphalt layer 3 with a bi-component premixed anti-skid material, and drying to complete the construction operation of a newly-built inspection well.

During concrete curing, lay plastic film, geotechnological cloth and steel sheet to reinforced concrete loading board 5 tops in proper order, inside the steel sheet passed pitch layer 3 through the anchor bar and inserted grey soil layer 2, be equipped with annular cushion between steel sheet and the 3 tops of pitch layer, lay asphalt concrete in the steel sheet periphery and look for the slope.

The construction steps of modifying and maintaining the inspection well are as follows:

Construction attention:

1. the well mouth construction needs to adopt a post-excavation method, namely, after the surface layer asphalt rolling procedure is finished, the well mouth area is subjected to joint cutting and excavation;

2. after excavation, related units are organized according to specifications to commonly test grooves;

3. c40 concrete is adopted in the super-excavated part, and the super-excavated part and the superstructure are cast together;

4. when the inspection well is maintained, the thickness of the ground is broken by 400mm, the ground is dug downwards to the top plate of the inspection well along a broken side line, the miscellaneous soil with unqualified quality and compactness around the well neck is cleaned, and the size of a cleaning range is not less than that shown in figure 2; grading broken stones are selected as well periphery backfill materials, layered compaction is carried out, the layer thickness is less than or equal to 200mm, the compaction degree is greater than or equal to 95%, and backfill is carried out to 400mm below the pavement elevation;

5. the well mouth concrete is aligned with the lower shaft, and the fitting error of the inner surface of the shaft wall is not more than 2 mm;

6. the cast iron well lid construction support can adopt a steel bar stirrup, and other materials such as clay bricks are strictly forbidden to be lifted and leveled and left under a well base;

7. the concrete bearing plate construction needs to be fully vibrated and slurry is lifted, and the smooth surface of the concrete surface is ensured, so that aggregates cannot be exposed;

8. the joint of the bearing plate and the peripheral asphalt road is crack-grouted by fast-cracking sprayed cationic emulsified asphalt (PC-3), and the technical indexes of the crack-grouted emulsified asphalt meet the relevant regulations of 'technical requirements for emulsified asphalt for roads' in 'Town road engineering construction and quality acceptance Specification' (CJJ1-2008) table 8.1.7-2.

9. Controlling the elevation of the concrete bearing plate: the allowable deviation of the flatness of the upper surface is less than or equal to 1mm, and the height difference of the joint of the upper surface, peripheral roads and cast iron well lid marks is not more than 1 mm;

10. when the concrete curing period is not enough, the road must be opened for passing, and the steel plate is adopted for protection in the curing period;

11. after the bearing plate is poured for 30 days, brushing a bi-component premixed colored anti-skid material with the thickness of 1.5mm, wherein the color is selected to be consistent with the asphalt concrete of the surrounding road;

12. when the material is coated, the road surface is ensured to be clean and dry, and the construction can not be carried out in rainy and snowy days;

13. the construction weather temperature is 0-30 ℃, and the optimal weather temperature is 10-25 ℃;

14. before the construction of the concrete with the smooth surface, the steel brush is fully brushed, and then the air blower is used for blowing the pavement clean and then the construction can be carried out.

The technical parameters of the well lid are strengthened, the purchasing quality is strictly controlled, the purchasing quality of the well lid under a lane is strictly controlled, the requirements of the main technical parameters are determined and enforced:

1. the load-bearing grade of the manhole cover is D400, and the load-bearing capacity, the test load and the allowable residual deformation meet the requirements in the figure 16.

2. The well cover and the well seat material meet the regulations of nodular iron castings (GB 1348-2009).

3. The well cover and the well seat surface are kept flat and uniform in material, and have no defects of camber, cracks and influence on the service performance of the inspection well cover, and repair welding is not needed.

4. The surface color of the well cover is harmonious and uniform with the color of the road surface.

5. The surface and the back of the well lid must have a clear and easily-identified permanent mark, and the surface is as follows: pipeline type, load identification (D-400), road name, production time.

6. The well lid and the well base must be provided with corresponding anti-theft and locking devices, and the well lid is convenient and flexible to open when professional inspectors overhaul the well lid.

7. The well cover and the well seat are well adapted when being manufactured, and the well cover and the well seat do not shake and make noise when driving; the inspection well cover is processed by a contact surface machine, the height matching height difference between the well cover and the well base is not more than 1mm, and the matching total clearance is not more than 1.5 mm.

8. The surface of the well lid is provided with anti-skid convex points with the height of 4 mm.

9. The dimension and tolerance grade of the assembly structure of the well cover and the well seat meet the requirements of casting dimension tolerance and machining allowance (GB/T6414-1999).

10. Other requirements are in accordance with relevant regulations of inspection well cover (GBT23858-2009) and technical guide of urban road inspection well in Qingdao City.

Has the advantages that: the reinforced concrete bearing plate is adopted to change the deformation influence of road surface load on the inspection well, enlarge the load bearing area from the cover seat, disperse the concentrated stress of the well cover, reduce the driving impact pressure of the shaft by using the roadbed, share the load by the surrounding roadbed structure, and avoid directly bearing the force by the shaft, thereby buffering the impact load of the vehicle and solving the problem of asphalt fragment falling off; the reinforced concrete slab material is adopted, so that the phenomena of asphalt crack, delamination, cracking and falling off around the walling crib are overcome; the rigid integral bearing plate is adopted, so that the phenomena of local sinking and encumbrance caused by uneven settlement at the periphery of the well periphery are overcome; the road pavement color difference perception problem is solved by adopting a 1.5mm thick bi-component premixed anti-slip material for brushing, the visual aesthetic problem of road driving is solved, the color of concrete is basically consistent with that of an asphalt pavement in the initial construction stage, the asphalt color is gradually integrated with a well cover coating along with the delay of time, the color difference is gradually less obvious, and the problem of color difference perception of the concrete and the asphalt pavement is solved; the method has the advantages that the conventional construction sequence is changed by adopting a post-excavation construction method, the excavation work of the bearing plate foundation pit is carried out after the pavement asphalt paving is finished, and the post-excavation construction method solves the problems that the elevation of a conventional construction well cover is difficult to accurately match with the elevation of a peripheral road, the foundation construction of a well curb is weak, the process control is convenient to conceal, the problem that the elevation of the conventional inspection well is generally lower than the peripheral road surface to cause the jumping of vehicles at present, the problem that the pavement is not accurately controlled due to the elevation of the inspection well and the flatness of a paver is not well controlled is solved, the problem that the periphery of the inspection well is not compacted is solved, the problems that the work and material are stolen and reduced and the hollow are solved in the process of lifting the inspection well, the vehicles are firstly started and then lifted, the vehicles can be firstly driven, and the vehicles can be driven, and the other half of the well positions can be surrounded and driven, so that the traffic flow regulation problem is solved; the steel plate protection and the rapid traffic are adopted, when the conventional maintenance is not allowed, the road is urgently required to be opened for traffic, and the construction period is short, the steel plate on the upper part of the maintenance layer is adopted for protection, so that the traffic and the maintenance are synchronous, and the construction period is shortened; the main control indexes for manufacturing the well lid and the well ring are strengthened, and the problem of entering low-grade well lid products is solved; a set of new design scheme and construction method are provided for newly building and maintaining the inspection well in a new area for popularization.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method of construction, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method of construction, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a town road inspection shaft, includes concrete well section of thick bamboo (1), lime-soil layer (2) and pitch layer (3), its characterized in that: concrete well section of thick bamboo (1) top is equipped with heavy cast iron well lid (4), grey soil layer (2) top is located in pitch layer (3), be equipped with reinforced concrete loading board (5) between pitch layer (3) and heavy cast iron well lid (4), be equipped with concrete layer (6) between grey soil layer (2) and concrete well section of thick bamboo (1).

2. The town road manhole as claimed in claim 1, wherein: concrete well section of thick bamboo (1) bottom is equipped with well room apron (7), well room apron (7) top and road bed parallel and level, the road bed top is located in grey soil layer (2).

3. The town road manhole of claim 1, wherein: the heavy cast iron well lid is characterized in that a well seat of the heavy cast iron well lid (4) is fixedly connected with the top of a concrete well barrel (1), the bottom of the reinforced concrete bearing plate (5) extends to the inner side of a gray soil layer (2), and the joint of the well seat and the concrete well barrel (1) is located inside the reinforced concrete bearing plate (5).

4. The town road manhole of claim 1, wherein: the top of the heavy cast iron well lid (4) is flush with the top of the reinforced concrete bearing plate (5), and the top of the reinforced concrete bearing plate (5) is flush with the top of the asphalt layer (3).

5. The town road manhole of claim 1, wherein: the top of the reinforced concrete bearing plate (5) is provided with a bi-component premixed anti-slip material coating, and the bi-component premixed anti-slip material coating extends to the top of the asphalt layer (3).

6. The municipal road inspection shaft according to claim 5, wherein: the bi-component premixed anti-slip material coating is prepared by brushing and drying a methyl methacrylate bi-component material.

7. A construction method of a municipal road inspection well is characterized by comprising the following steps: the construction steps are as follows:

step (IV), installing a well seat and a well cover in the lime soil maintenance period: piling up a shaft in a well mouth by using a shaft adjusting block, then installing a shaft seat and a shaft cover on the top of the shaft, and filling concrete between the shaft and the lime soil;

step seven, concrete pouring of the bearing plate, installation of the well seat and the well lid, adjustment of the height of the well shaft by using a well shaft adjusting block to enable the well lid to be flush with the top of the asphalt, laying of reinforcing steel bars inside the bearing plate foundation pit, then pouring, formation of a reinforced concrete bearing plate outside the well shaft and the well seat, and flushing of the top of the reinforced concrete bearing plate with the top of the asphalt;

step (eight), painting the bi-component premixed anti-slip material: and (3) brushing a bi-component premixed anti-skid material on the top of the reinforced concrete bearing plate and the top of the joint of the reinforced concrete bearing plate and the asphalt, and drying to complete the construction operation of the newly-built inspection well.

8. The construction method of the town road manhole according to claim 7, wherein: in the step (V), isolating the well seat when paving the asphalt; in the step (VI), the bottom of the bearing plate foundation pit is positioned below the well seat; and (seventhly), pouring the joints of the reinforced concrete bearing plates and the asphalt by adopting quick-cracking spraying type cation emulsified asphalt.

9. The construction method of the municipal road inspection shaft according to claim 7, wherein: during concrete curing, plastic films, geotextiles and steel plates are sequentially paved above the reinforced concrete bearing plate, the steel plates penetrate through asphalt through anchor bars and are inserted into the grey soil, an annular rubber mat is arranged between the steel plates and the top of the asphalt, and asphalt concrete is paved on the periphery of the steel plates to find slopes.

10. The construction method of the town road manhole according to claim 7, wherein: the construction steps of modifying and maintaining the inspection well are as follows:

s1, excavating the asphalt pavement outside the inspection well, forming a foundation pit outside the shaft, and extending the bottom of the foundation pit to the position above the well chamber cover plate;