CN112647543A - Rigid mounting construction method for manhole cover - Google Patents
Rigid mounting construction method for manhole cover Download PDFInfo
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- CN112647543A CN112647543A CN202110033164.4A CN202110033164A CN112647543A CN 112647543 A CN112647543 A CN 112647543A CN 202110033164 A CN202110033164 A CN 202110033164A CN 112647543 A CN112647543 A CN 112647543A
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- well
- manhole cover
- asphalt concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
Abstract
The invention relates to a rigid mounting construction method of a manhole cover, belonging to the technical field of municipal engineering. The invention increases the whole bearing capacity of the manhole cover by adopting a backfill mode of rigid material C50 concrete on the periphery of the manhole cover, avoids the bounce and abnormal noise of the manhole cover when rolling the vehicle tyre, has good integrity by fixing the adjusting ring by the expansion bolt and simultaneously matching with the cement ring on the periphery of the manhole cover, avoids the phenomena of sedimentation and displacement of the manhole cover in the using process, and when the manhole cover is paved with the pavement asphalt, the asphalt on the periphery of the manhole cover and the pavement asphalt are paved and rolled synchronously, and are molded at one time, the top surface of the manhole cover is basically consistent with the elevation of the pavement after the manhole cover is installed.
Description
Technical Field
The invention relates to a rigid mounting construction method of a manhole cover, belonging to the technical field of municipal engineering.
Background
The inspection well is mainly used for conveniently maintaining and installing power supply, water drainage, communication, cable television, gas pipes, street lamp lines and the like of urban underground infrastructure. Typically at pipe junctions, turns, pipe diameter or slope changes, and at regular intervals along a straight pipe section to facilitate periodic inspection of the associated structure. In large municipal infrastructure construction projects, road engineering and drainage engineering are important components thereof. The maintenance and dredging of the drainage engineering pipeline are realized by drainage inspection wells distributed on the road surface. After the road is put into use for a long time, the manhole cover of the inspection well is continuously subjected to elastic deformation under the action of long-term repeated variable load, so that the asphalt around the well is deformed to the maximum under the repeated action of the frame of the manhole cover to cause fatigue damage and fracture damage, and the problems of displacement, jumping and abnormal sound easily occur in the using process of the manhole cover; the reason is that the road surface around the well cover collapses or the well cover foundation collapses (non-shaft collapses), and the further reason is that the existing well cover is stressed on the well seat in the rolling process of the vehicle and is not stressed uniformly; in order to solve the above problems, the manhole cover is usually subjected to anti-settling treatment during installation. In the prior art, the installation steps of the manhole cover include: mounting a prefabricated adjusting ring at a well position, and controlling the well cover in an elevation so that the well cover is flush with the road surface or slightly higher than the road surface; then, filling asphalt mixture in the working pit; at last, it is whole to roll closely, and this kind of mode is from structural certain peripheral collapse, damage phenomenon of solving, but because the wholeness of well lid and well week is relatively poor, and there is the difference in the meeting an emergency that both born the stress production, makes the peripheral damage of well lid, the phenomenon of taking place the separation between the two after long-time, and then appears displacement, jump, abnormal sound problem, the travelling comfort of direct influence driving, consequently, it is necessary to carry out further improvement to it.
Disclosure of Invention
The invention aims to: the rigid installation construction method of the manhole cover is even in stress, good in integrity of the manhole cover and the manhole periphery, capable of effectively avoiding the phenomena that the manhole cover periphery is damaged and the manhole cover and the manhole periphery are separated, and capable of preventing the problems of displacement, jumping and abnormal sound in the using process.
The technical scheme of the invention is as follows:
a rigid mounting construction method for a manhole cover is characterized by comprising the following steps: it comprises the following steps;
1) after the cement stabilized soil layer, the bottom layer asphalt concrete and the middle layer asphalt concrete on the roadbed are paved, drawing a circular construction line outside the wellhead of the inspection well by taking the wellhead of the inspection well as the center, and requiring that the distance between the wellhead circumference margin of the inspection well and the construction line is not less than 400 mm;
2) removing bottom asphalt concrete and middle asphalt concrete between the peripheral margin of the wellhead and the construction line, exposing a well ring of the inspection well to form a concave annular working surface, and cleaning the working surface to remove broken stone residues on the working surface and keep the working surface clean;
3) placing an adjusting ring of a manhole cover on a working surface of a manhole mouth margin, pre-fixing the adjusting ring and a manhole ring of the manhole by adopting an expansion bolt, and sleeving a manhole cover support on the adjusting ring;
4) after the well lid support is sleeved, determining the road surface elevation by adopting a well drawing line mode, wherein the bottom of the adjusting ring is plugged with steel plate gaskets (blocks) with different thicknesses of 80mm in length and 60mm in width to integrally level the well lid of the inspection well; the elevation of a manhole cover is required to be consistent with the elevation of asphalt on a pavement surface;
5) when the elevation of the manhole cover of the inspection well is consistent with the elevation of the asphalt of the pavement surface layer, the expansion bolt is screwed down, so that the whole manhole cover of the inspection well is fixed on the well ring;
6) after the manhole cover of the inspection well is fixed, sealing and filling a gap between the adjusting ring and the well ring by using M10 cement mortar; to enhance the installation strength between the adjusting ring and the walling crib; preparing for subsequent concrete pouring, and preventing the concrete from leaking out of the gaps in the concrete pouring process;
7) after the gap between the adjusting ring and the well ring is filled, and when the strength of M10 cement mortar reaches over 75% of a design value, C50 concrete is poured on the working surfaces of the periphery of the well cover support and the adjusting ring by adopting a surrounding filling method, and the concrete is tightly filled by using a vibrating rod; the integrity among the well ring, the adjusting ring and the well cover support is enhanced, wherein the slump of the C50 concrete is 80-120 mm; the mixing proportion, the quality requirement and the test method can meet the regulations of GB/T14902-;
8) after the concrete is completely condensed, filling bottom layer asphalt concrete and middle layer asphalt concrete in the concave working face; wherein, the bottom layer asphalt concrete and the middle layer asphalt concrete are required to be paved and compacted in layers, the layering compaction thickness is consistent with the structural form of the designed road asphalt pavement, and the compaction degree is not less than 97%;
9) the bottom layer asphalt concrete and the middle layer asphalt concrete in the working face are paved and finished, the surface layer asphalt concrete is paved, the surface layer asphalt concrete on the periphery of the inspection well cover is paved and rolled with the road surface synchronously, one-step forming is consistent with the elevation of the inspection well cover, so that the inspection well cover is consistent with the road surface drainage gradient, the inspection well cover and the road surface are integrated, and rigid installation construction of the inspection well cover of the inspection well is informed promptly.
The enclosing and filling method in the step 6) comprises the following steps:
a) firstly, placing a hoop on the working surface at the periphery of the manhole cover support and the adjusting ring, and reserving a distance of 150mm between the circumference of the hoop and the circumferences of the adjusting ring and the manhole cover support; the height of the hoop is consistent with the height of the middle layer asphalt concrete;
b) c50 concrete is poured between the hoop, the adjusting ring and the well lid support, and the concrete is filled and compacted by a vibrating rod; the pouring elevation of the C50 concrete is consistent with the elevation of the hoop;
c) before the C50 concrete is initially set, the upper surface of the cement ring layer is napped, then a mould is sleeved on the well lid support, and the cavity between the well lid support and the mould is filled with C50 concrete for 2 times by using a process hole on the well lid support by adopting a conventional spraying method;
d) after 2 times of filling and initial setting of concrete, removing the mould, and forming a convex concrete wrapping layer after the concrete is completely set, so as to further enhance the integrity between the concrete and the adjusting ring and the well lid support, and the overall strength of the concrete, and prevent the concrete from being damaged by crushing;
e) after the concrete is completely condensed, the bottom layer asphalt concrete and the middle layer asphalt concrete can be filled in the working surface at the periphery of the hoop in a layered mode; the bottom layer asphalt concrete and the middle layer asphalt concrete are required to be paved and compacted in a layered mode, the layered compaction thickness is consistent with the structural form of the designed road asphalt pavement, and the elevation is consistent with that of the hoop; the degree of compaction is not less than 97%;
f) after the bottom layer asphalt concrete and the middle layer asphalt concrete in the working face are paved, the surface layer asphalt concrete can be paved, the surface layer asphalt concrete on the periphery of the manhole cover is paved and rolled with the road surface synchronously, and the manhole cover and the road surface are integrated into a whole through one-step forming.
The manhole cover of the inspection well in the step 3) comprises a manhole cover body, an adjusting ring and a manhole cover support, wherein the manhole cover body is movably arranged on the manhole cover support through a hinge, the bottom of the manhole cover support is movably provided with the adjusting ring, the adjusting ring is composed of a cylindrical ring body and a flange on the outer circumference of the bottom of the ring body, the ring body and the flange are mutually welded, and mounting holes are uniformly distributed on the circumference of the flange; the adjusting ring is fixedly connected with a well ring of the inspection well through an expansion bolt through a mounting hole; the adjusting ring and the well ring on the periphery of the well cover support are provided with concrete wrapping layers through the hoop, the concrete wrapping layers are in close contact connection with bottom asphalt concrete and middle asphalt concrete through the hoop, and the concrete wrapping layers are in close fit connection with upper asphalt concrete through the step surface.
And a gasket is arranged between the adjusting ring and the well ring.
A triangular reinforcing plate is welded between the ring body and the flange.
The well lid support be the cylindric of T type for the cross-section, the hole of well lid support is the shoulder hole, the well lid body passes through the circular bead face movable mounting of shoulder hole on the well lid support.
The inner wall of the circumference of the well lid support below the well lid body is evenly provided with lug plates for hanging anti-falling nets, and the lug plates are provided with hanging holes. The circumference outward appearance is provided with the supporting shoe on the well lid support.
The circumference of the top of the well lid support is symmetrically provided with process holes.
The hoop is in a conical ring shape, and the inner surface and the outer surface of the hoop are uniformly provided with connecting teeth.
The connecting teeth between the circumferences of the inner surface and the outer surface of the hoop are arranged in a staggered manner.
In order to detect the deviation condition of the invention in the actual use process, the applicant carries out field random detection on the well cover of the 220-seat pavement inspection well which is finished and delivered for use, and the result is shown in the table:
table 1 shows: a random detection deviation recording meter is arranged on the well cover of the inspection well of the asphalt concrete pavement rigidly after 1 year of use;
as can be seen from Table 1, after the manhole cover of the inspection well on the asphalt concrete pavement is rigidly installed and used for 1 year, the deviation of the manhole cover meets the design requirement. And sensory detection and actual measurement by using a steel ruler are carried out to ensure that the asphalt concrete pavement is tightly attached to the manhole cover without separation.
The invention has the beneficial effects that:
the invention increases the whole bearing capacity of the manhole cover by adopting a backfill mode of rigid material C50 concrete on the periphery of the manhole cover, avoids the bounce and abnormal noise of the manhole cover when rolling the vehicle tyre, has good integrity by fixing the adjusting ring by the expansion bolt and simultaneously matching with the cement ring on the periphery of the manhole cover, avoids the phenomena of sedimentation and displacement of the manhole cover in the using process, and when the manhole cover is paved with the pavement asphalt, the pavement asphalt concrete on the peripheral surface layer of the manhole cover and the pavement asphalt are paved synchronously, and the manhole cover is molded at one time, and the top surface of the manhole cover is consistent with the elevation of the pavement after the manhole cover is installed and rolled.
Drawings
FIG. 1 is a schematic cross-sectional view of the manhole cover of the present invention;
FIG. 2 is a schematic perspective exploded view of the manhole cover of the present invention;
FIG. 3 is a schematic view of rigid installation of a manhole cover according to embodiment 1 of the present invention;
FIG. 4 is a cross-sectional structural view of the ferrule of the present invention;
FIG. 5 is an enlarged view of the point A in FIG. 3;
FIG. 6 is a schematic view of the rigid mounting of the improved top band of the present invention;
FIG. 7 is a schematic view of the improved rigid mounting of the ferrule of the present invention.
In the figure: 1. roadbed, 2, inspection well, 3, walling crib, 4, cement stabilized soil layer, 5, bottom asphalt concrete, 6, middle layer asphalt concrete, 7, surface course asphalt concrete, 8, manhole cover body, 9, adjustable ring, 10, manhole cover support, 11, deep floor, 12, mounting hole, 13, flange, 14, reinforcing plate, 15, expansion bolt, 16, steel plate gasket, 17, otic placode, 18, fabrication hole, 19, hoop, 20, concrete wrapping layer, 21, linking tooth, 22, supporting shoe, 23, top hoop.
Detailed Description
The rigid mounting construction method of the manhole cover comprises the following steps;
after the cement stabilized soil layer 4, the bottom layer asphalt concrete 5 and the middle layer asphalt concrete 6 on the roadbed 1 are paved, a circular construction line is drawn outside the wellhead of the inspection well 2 by taking the wellhead of the inspection well 2 as the center, and the distance between the peripheral margin of the wellhead of the inspection well and the construction line is required to be not less than 400 mm. After the construction line is drawn, removing bottom asphalt concrete 5 and middle asphalt concrete 6 between the circumferential margin of the wellhead and the construction line, exposing the upper surface of a well ring 3 (reinforced concrete prefabricated part) of the inspection well to form a concave annular working surface, and cleaning the working surface to remove broken stone residues on the working surface and keep the working surface clean; the adjusting ring 9 of the manhole cover is placed on a working surface of the marginal opening of the manhole 2, then the adjusting ring 9 and the well ring 3 of the manhole 2 are pre-fixed by adopting an expansion bolt 15, and then the manhole cover support 10 is sleeved on the adjusting ring 3.
The inspection well cover comprises a well cover body 8, an adjusting ring 9 and a well cover support 10, wherein the well cover body 8 is movably mounted on the well cover support 10 through a hinge, and a latticed reinforcing rib plate 11 is arranged on the lower surface of the well cover body 8; so as to strengthen the bearing strength of the well lid body 8. The bottom of the well lid support 10 is movably provided with an adjusting ring 9. The adjusting ring 9 is composed of a cylindrical ring body and a flange 13 on the outer circumference of the bottom of the ring body, the ring body and the flange 13 are mutually welded, and mounting holes 12 are uniformly distributed on the circumference of the flange 13; a triangular reinforcing plate 14 is welded between the ring body and the flange 13; to reinforce the strength of the fit between the ring body and the flange 13. The adjusting ring 9 is fixedly connected with a well ring 3 of the inspection well 2 through an installing hole 12 by an expansion bolt 15; a gasket 16 is arranged between the adjusting ring 9 and the well ring 3 of the inspection well 2, and the adjusting ring 9 is used for adjusting the integral levelness of the well cover of the inspection well.
Well lid support 10 is the cylindric of T type for the cross-section, and the hole of well lid support 10 is the shoulder hole, and the movable mounting on well lid support 10 is realized through the circular bead face of shoulder hole to well lid body 8. The inner wall of the circumference of the well lid support 10 below the well lid body 8 is evenly provided with lug plates 17 for hanging anti-falling nets, hanging holes are formed in the lug plates 17, and the circumference of the top of the well lid support 10 is symmetrically provided with process holes 18. The circumference outward appearance of well lid support 10 upper end is provided with supporting shoe 22, and well lid support 10 accomplishes the suit back on adjustable ring 9, and the top and the supporting shoe 22 contact of adjustable ring 9, well lid support 10 bottom and adjustable ring 9 bottom parallel and level.
After the well lid support 10 is sleeved, determining the road surface elevation in a way of drawing a well, wherein the bottom of the adjusting ring 9 is plugged with steel plate gaskets 16 (blocks) with different thicknesses, such as length of 80mm and width of 60mm, to integrally level the well lid of the inspection well; the elevation of the manhole cover is required to be consistent with the elevation of the asphalt of the pavement surface, and when the elevation of the manhole cover is consistent with the elevation of the asphalt of the pavement surface, the expansion bolt 15 is screwed, so that the whole manhole cover is fixed on the well ring 3. After the manhole cover is fixed, the gap between the adjusting ring 9 and the well ring 3 is sealed and filled by M10 cement mortar; to enhance the mounting strength between the adjusting ring 9 and the well ring 3; preparing for subsequent concrete pouring, and preventing the concrete from leaking out of the gaps in the concrete pouring process;
after the gap between the adjusting ring 9 and the well ring 3 is filled, and when the strength of M10 cement mortar reaches over 75% of a design value, C50 concrete is poured on the working surface at the periphery of the well cover support 10 and the adjusting ring 9 by adopting a surrounding filling method, and the concrete is tightly filled by using a vibrating rod; the integrity between the well ring, the adjusting ring and the well cover support is enhanced, wherein the slump of the C50 concrete is 80-120 mm; the mixing proportion, the quality requirement and the test method can meet the regulations of GB/T14902-.
The enclosing and filling method comprises the following steps:
firstly, a hoop 19 is placed on the working surface of the periphery of a well lid support and an adjusting ring, the hoop 19 is in a conical ring shape and is formed by bending a steel plate with the thickness of 10-15 mm, linking teeth 21 are uniformly distributed on the circumferences of the inner surface and the outer surface of the hoop 19, and the linking teeth 21 between the circumferences of the inner surface and the outer surface of the hoop 19 are arranged in a staggered mode and are used for being linked with concrete and asphalt concrete to increase the integrity of the concrete and the asphalt concrete.
The distance of 150mm is reserved between the circumference of the hoop 19 and the circumferences of the adjusting ring 9 and the well lid support 10; the height of the hoop 19 is consistent with the height of the middle asphalt concrete 6, C50 concrete is poured between the hoop 19 and the adjusting ring 9 and between the hoop and the well cover support 10, and the concrete is tightly filled by a vibrating rod; the casting elevation of the C50 concrete corresponds to the elevation of the ferrule 19. Before the initial setting of the poured concrete, the upper surface of the cement ring layer is roughened and cleaned, so that a plurality of annular grooves are formed in the upper surface of the cement ring layer, and the concrete is convenient to interlock with the surface layer asphalt concrete 7 in the later period. Then sleeving a cylindrical mould on the well lid support 10, enabling the bottom of the mould to be in contact with the top of the cement ring layer, and filling C50 concrete for 2 times in a cavity between the well lid support and the mould by utilizing the fabrication holes 18 on the well lid support 10 by adopting a conventional injection method; 2 fill and the concrete is preliminary the back that condenses for time, demolish the mould, treat that the concrete condenses completely and makes its concrete parcel layer 20 that forms a type of dogbone to the wholeness between concrete and adjustable ring 9 and the well lid support 10 is further strengthened, and the bulk strength on concrete parcel layer 20 prevents that the condition of crushing damage from appearing in concrete parcel layer 20.
After the concrete wrapping layer 20 is completely condensed, the bottom layer asphalt concrete 5 and the middle layer asphalt concrete 6 can be filled in the working surface at the periphery of the hoop 19 in a layered mode; the bottom layer asphalt concrete 5 and the middle layer asphalt concrete 6 are required to be paved and compacted in a layered mode, the layered compaction thickness is consistent with the structural form of the designed road asphalt pavement, and the elevation is consistent with the elevation of the hoop 19; the degree of compaction is not less than 97%; after the bottom layer asphalt concrete 5 and the middle layer asphalt concrete 6 in the working face are paved, the surface layer asphalt concrete 7 can be paved, the surface layer asphalt concrete 7 around the manhole cover is paved and rolled synchronously with the road surface, and the manhole cover and the road surface are integrated into a whole through one-step forming; forming a hoop 19 to be closely contacted and connected with the bottom layer asphalt concrete 5 and the middle layer asphalt concrete 6; the concrete wrapping layer 20 is in a step-shaped connection state of being tightly attached to the upper asphalt concrete 7 through a step surface.
In the invention, because the convex concrete wrapping layer 20 is poured on the peripheries of the adjusting ring 9 and the well lid support 10, and the minimum outer diameter section at the upper end of the concrete wrapping layer 20 is consistent with the maximum outer diameter of the well lid support 4, in the using process, the top of the concrete wrapping layer 20 is protected by the well lid support 4, the hoop 10 forms hoop enclosure for the maximum outer diameter section of the concrete wrapping layer 20, and the concrete wrapping layer 20 otherwise supports the well lid support 4, and the three cooperate with each other to form a whole among the adjusting ring 9, the well lid support 10 and the concrete wrapping layer 20, in operation, the pressure born by the well lid of the inspection well and the minimum outer diameter section at the upper end of the concrete wrapping layer 20 is dispersed by the maximum outer diameter section of the concrete wrapping layer 20, thereby increasing the whole bearing capacity of the well lid of the inspection well, and the upper asphalt concrete 7 paved on the step surface of the concrete wrapping layer 20, the pressure bearing of the step surface of the concrete wrapping layer 20 is buffered, so that the fatigue settlement phenomenon generated by the long-term alternating load action of the well lid support 10 is avoided, and meanwhile, the hoop at the maximum outer diameter position of the concrete wrapping layer 20 is enclosed by the hoop 19; not only form the restriction to the radial expansive force behind the 20 biggest external diameter departments of concrete parcel layer pressure-bearing, and form the rigidity protection to the 20 biggest external diameter section border of concrete parcel layer, the 20 border of concrete parcel layer is by at first conquassation in having avoided the use, thereby lead to the condition of the 20 whole damage of concrete parcel layer, the strength of condensation of cement circle layer 11 has been increased, and then the wholeness between inspection shaft well lid and the concrete parcel layer 20 has been increased, avoided inspection shaft well lid to beat and abnormal sound when making the vehicle tire roll from this.
On the other hand, the adjusting ring 9 is fixed by the expansion bolt, and the expansion bolt is matched with the concrete wrapping layer 20 on the periphery of the manhole cover, so that the integrity of the inspection well cover is better, the engaging teeth 21 uniformly distributed on the circumferences of the inner surface and the outer surface of the hoop 19 can better engage the concrete wrapping layer 20 with asphalt concrete, and the phenomenon of separation between the concrete wrapping layer 20 and the asphalt concrete is avoided; because the hoop 19 is the conical body, increased its bearing capacity, further increased the whole bearing capacity of inspection shaft well lid, and then avoided the settlement of current inspection shaft well lid in the use, the displacement phenomenon, and when inspection shaft well lid periphery carries out surface course bituminous concrete 7 and paves, the peripheral surface course bituminous concrete 7 of inspection shaft well lid paves with the road surface is synchronous and rolls, one shot forming, inspection shaft well lid top surface is unanimous basically with the road surface elevation after inspection shaft well lid installation is accomplished, it is fast to have the efficiency of construction, the characteristics that quality effect and aesthetic property are good, the installation to inspection shaft well lid is under construction has positive popularization meaning.
As an improvement of the invention, the periphery of the small-diameter section of the concrete coating layer 20 is provided with a top hoop 23, and the circumference of the outer surface of the top hoop 23 is uniformly provided with connecting teeth 21 for connecting with asphalt concrete to increase the integrity of the concrete coating layer. The 23 internal diameters of top hoop correspond with the biggest external diameter of well lid support 10, highly and well lid support 10 parallel and level to the hoop 10 of cooperation concrete parcel layer 20 bottom encloses to the staple bolt that concrete parcel layer 20 formed the echelonment and closes, thereby further strengthens the shaping intensity of concrete parcel layer 20 path section.
As a modification of the present invention, the concrete coating 20 is internally coated with a keel.
As an improvement of the hoop 19, the outer surface of the hoop 19 is evenly provided with engaging teeth 21 on the circumference for engaging with asphalt concrete to increase the integrity. The height of the hoop 19 is consistent with that of a manhole cover so as to ensure that the manhole cover is consistent with a road surface drainage gradient, the inner diameter of the hoop 19 corresponds to the outer diameter of the manhole cover, during construction, the hoop 19 is sleeved on the manhole support 10, the bottom of the hoop 19 is contacted with the well ring 3, and a cavity between the manhole support and the hoop 19 is filled with C50 concrete by using a fabrication hole 18 on the manhole support 10 by adopting a conventional injection method; so that a cylindrical concrete wrapping layer 20 is formed on the periphery of the adjusting ring 9 and the well lid support 10.
Claims (2)
1. A rigid mounting construction method for a manhole cover is characterized by comprising the following steps: it comprises the following steps;
1) after the cement stabilized soil layer (4), the bottom asphalt concrete (5) and the middle asphalt concrete (6) on the roadbed (1) are paved, drawing a circular construction line outside the wellhead of the inspection well (2) by taking the wellhead of the inspection well (2) as a center, and requiring that the distance between the wellhead circumference margin of the inspection well (2) and the construction line is not less than 400 mm;
2) removing bottom asphalt concrete (5) and middle asphalt concrete (6) between the marginal periphery of the wellhead and a construction line, exposing a well ring (3) of the inspection well (2) to form a concave annular working surface, and cleaning the working surface to remove broken stone residues on the working surface and keep the working surface clean;
3) placing an adjusting ring (9) of a manhole cover of the inspection well on a working surface of a wellhead margin of the inspection well (2), then adopting an expansion bolt (15) to pre-fix the adjusting ring and a well ring (3) of the inspection well (2), and then sleeving a manhole support (10) on the adjusting ring (9);
4) after the well lid support (10) is sleeved, determining the road surface elevation in a way of drawing a well, wherein the bottom of the adjusting ring (9) is plugged with steel plate gaskets (16) with different thicknesses, the length of which is 80mm and the width of which is 60mm, so as to integrally level the well lid of the inspection well; the elevation of the manhole cover is required to be consistent with that of asphalt concrete (7) of the pavement surface layer;
5) when the elevation of the manhole cover is consistent with that of the pavement surface asphalt concrete (7), the expansion bolt (15) is screwed down to fix the whole manhole cover on the well ring (3);
6) after the manhole cover of the inspection well is fixed, M10 cement mortar is used for plugging and filling a gap between the adjusting ring (9) and the well ring (3); so as to strengthen the installation strength between the adjusting ring (9) and the well ring (3); preparing for subsequent concrete pouring, and preventing the concrete from leaking out of the gaps in the concrete pouring process;
7) after the gap between the adjusting ring (9) and the well ring (3) is filled, and when the strength of M10 cement mortar reaches over 75% of a design value, C50 concrete is poured on the working surface at the periphery of the well cover support (10) and the adjusting ring (9) by adopting a surrounding filling method, and the concrete is filled and compacted by using a vibrating rod; the integrity among the well ring (3), the adjusting ring (9) and the well cover support (10) is enhanced, wherein the slump of the C50 concrete is 80-120 mm; the mixing proportion, the quality requirement and the test method can meet the regulations of GB/T14902-;
8) after the concrete is completely condensed, filling bottom layer asphalt concrete and middle layer asphalt concrete in the concave working face; wherein the bottom layer asphalt concrete (5) and the middle layer asphalt concrete (6) are required to be paved and compacted in a layered mode, the layered compaction thickness is consistent with the structural form of the designed road asphalt pavement, and the compaction degree is not less than 97%;
9) the bottom layer asphalt concrete (5) and the middle layer asphalt concrete (6) in the working face are laid and finished, the surface layer asphalt concrete (7) can be paved, the peripheral surface layer asphalt concrete (7) of the inspection well cover is paved and rolled with the road surface synchronously, one-step forming is consistent with the elevation of the inspection well cover, the inspection well cover is guaranteed to be consistent with the slope of road surface drainage, the inspection well cover and the road surface are integrated, and rigid mounting construction of the inspection well cover of the inspection well is informed promptly.
2. The rigid mounting construction method for the manhole cover of the inspection well according to claim 1, wherein the rigid mounting construction method comprises the following steps:
the enclosing and filling method in the step 6) comprises the following steps:
a) firstly, placing a hoop (19) on the working surface at the periphery of a well lid support (10) and an adjusting ring (9), and reserving a distance of 150mm between the circumference of the hoop (19) and the circumferences of the adjusting ring (9) and the well lid support (10); the height of the hoop (19) is consistent with the height of the middle layer asphalt concrete (6);
b) c50 concrete is poured among the hoop (19), the adjusting ring (9) and the well lid support (10), and the concrete is filled and compacted by a vibrating rod; the casting elevation of the C50 concrete is consistent with the elevation of the hoop (19);
c) before the concrete is initially set, the upper surface of the cement ring layer is napped and cleaned, then a mould is sleeved on the well lid support (10), and the cavity between the well lid support (10) and the mould is filled with C50 concrete for 2 times by using the fabrication holes (18) on the well lid support (10) by adopting a conventional injection method;
d) after 2 times of filling and the concrete is primarily condensed, the mould is dismantled, and the concrete is completely condensed to form a convex concrete wrapping layer (20) so as to further enhance the integrity between the concrete and the adjusting ring (9) and the well cover support (10) and the integral strength of the concrete and prevent the concrete from being crushed and damaged;
e) after the concrete is completely condensed, the bottom layer asphalt concrete (5) and the middle layer asphalt concrete (6) can be filled in the working surface at the periphery of the hoop (19) in a layered mode; the bottom layer asphalt concrete (5) and the middle layer asphalt concrete (6) are required to be paved and compacted in a layered mode, the layered compaction thickness is consistent with the structural form of the designed road asphalt pavement, and the elevation is consistent with that of the hoop (19); the degree of compaction is not less than 97%;
f) after the bottom layer asphalt concrete (5) and the middle layer asphalt concrete (6) in the working face are paved, the surface layer asphalt concrete (7) can be paved, the surface layer asphalt concrete (7) on the periphery of the manhole cover is paved and rolled with the road surface synchronously, and the manhole cover and the road surface are integrated through one-step forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110033164.4A CN112647543B (en) | 2021-01-12 | 2021-01-12 | Rigid mounting construction method for manhole cover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110033164.4A CN112647543B (en) | 2021-01-12 | 2021-01-12 | Rigid mounting construction method for manhole cover |
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| Publication Number | Publication Date |
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| CN112647543A true CN112647543A (en) | 2021-04-13 |
| CN112647543B CN112647543B (en) | 2022-04-12 |
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| CN202110033164.4A Active CN112647543B (en) | 2021-01-12 | 2021-01-12 | Rigid mounting construction method for manhole cover |
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| CN113338343A (en) * | 2021-06-17 | 2021-09-03 | 泰州市嘉德利金属制品有限公司 | Invisible well cover for pavement and pavement of sidewalk |
| CN114703901A (en) * | 2022-02-16 | 2022-07-05 | 福建建工基础设施建设集团有限公司 | Construction method of rain sewage well cover |
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| CN113338343A (en) * | 2021-06-17 | 2021-09-03 | 泰州市嘉德利金属制品有限公司 | Invisible well cover for pavement and pavement of sidewalk |
| CN114703901A (en) * | 2022-02-16 | 2022-07-05 | 福建建工基础设施建设集团有限公司 | Construction method of rain sewage well cover |
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| CN112647543B (en) | 2022-04-12 |
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