CN113931033A - Maintenance device and method for road inspection well and pavement around well - Google Patents
Maintenance device and method for road inspection well and pavement around well Download PDFInfo
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- CN113931033A CN113931033A CN202111255643.7A CN202111255643A CN113931033A CN 113931033 A CN113931033 A CN 113931033A CN 202111255643 A CN202111255643 A CN 202111255643A CN 113931033 A CN113931033 A CN 113931033A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/096—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating and filling
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- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Road Paving Structures (AREA)
- Road Repair (AREA)
Abstract
The invention discloses a maintenance device and a maintenance method for a road inspection well and a pavement around the well, which belong to the technical field of road engineering pavement maintenance, and can solve the problems of poor maintenance quality and low efficiency of the existing inspection well and pavement around the well through the arrangement of an integral structure; the technical scheme is as follows: the structure comprises a first structural layer and a second structural layer which are adjacently arranged up and down, wherein the first structural layer and the second structural layer are both of annular structures, a connecting piece is embedded in the top of the second structural layer, the top of the connecting piece is embedded in the first structural layer, and a fastening piece is fixedly arranged on the top of the connecting piece; the second structural layer comprises a cylindrical frame structure, and concrete layers are arranged inside and outside the frame structure.
Description
Technical Field
The invention relates to the technical field of road engineering pavement maintenance, in particular to a maintenance device and method for a road inspection well and a pavement around the well.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In city infrastructure construction, city pipe network is city infrastructure's important component, and the inspection shaft is the indispensable component of city pipe network, because the difference of inspection shaft structure and road structure, the inspection shaft produces the settlement easily, and under the repeated action of vehicle load, the road surface (for short "all-round road surface of well") is very easily produced various diseases such as settlement, fracture around the inspection shaft, leads to the road whole roughness poor, and the driving is jolted, influences the vehicle and goes the quality, and the vehicle leads to the fact serious traffic accident for avoiding the well lid even.
The existing inspection well shaft and foundation are mostly of a brick structure or a prefabricated concrete well shaft, when a vehicle passes through the inspection well, load acts on the well cover and the well seat, and is directly transmitted to the shaft and the foundation through a well ring, so that unit stress borne by the shaft and the foundation is overlarge, and the problems of sinking, cracking, peeling and the like are easily caused on the inspection well and the road surface around the inspection well.
The inventor finds that the existing inspection well and the maintenance method of the pavement around the well mostly adopt asphalt cold-patch materials or hot-mix asphalt mixtures for repairing, and the repairing has more problems, such as: asphalt cold-patch materials are generally low in strength and difficult to meet the performance requirements of roads around wells, hot-mixed asphalt mixtures are adopted for patching, the patching area is small, the cooling speed is too high, and the construction and engineering quality of the roads around the wells are difficult to guarantee due to the influence of inspection wells.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a maintenance device for a road inspection well and a pavement around the well and a use method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a maintenance device for a road inspection well and a pavement around the well, which comprises a first structural layer and a second structural layer which are adjacently arranged up and down, wherein the first structural layer and the second structural layer are both of annular structures, a connecting piece is embedded in the top of the second structural layer, the top of the connecting piece is embedded in the first structural layer, and a fastening piece is fixedly arranged on the top of the connecting piece; the second structural layer comprises a cylindrical frame structure, and concrete layers are arranged inside and outside the frame structure.
As a further technical scheme, the frame structure comprises a plurality of layers of annular ribs, the annular ribs are arranged at intervals, and hoops are connected between the annular ribs.
As a further technical scheme, the inner side wall of the second structural layer is provided with reserved hole sites, and the reserved hole sites are arranged at intervals of 60 degrees along the horizontal direction of the middle part of the second structural layer, so that the assembled structure can be conveniently installed or disassembled by matching with a hoisting head.
As a further technical solution, the inner diameters of the first structural layer and the second structural layer are the same, and the outer diameters of the first structural layer and the second structural layer are the same.
As a further technical scheme, the first structural layer is made of fiber composite modified asphalt concrete.
As a further technical scheme, the fiber composite modified asphalt concrete comprises the components of asphalt, a toughening component, stone and an anti-stripping agent.
As a further technical scheme, the asphalt is one of CF (micro carbon fiber powder)/SBS composite modified asphalt and SBR/CF/SBS composite modified asphalt.
As a further technical scheme, the toughening component is one of basalt fiber, polyester fiber and lignin fiber, and the anti-stripping agent is cement or mineral powder.
As a further technical scheme, a well seat is buried in the first structural layer, a base is arranged at the bottom of the well seat and is arranged at the top of the second structural layer, connecting holes are uniformly formed in the circumferential direction of the base, and connecting pieces penetrate through the connecting holes; the top of the first structural layer is flush with the top of the well base.
In a second aspect, the present invention provides a method for using the maintenance device for road manhole and pavement around the manhole, comprising the following steps:
detecting the disease range of the inspection well to be maintained and the pavement around the well, and determining the size of the maintenance device;
detecting the disease range of the inspection well to be maintained and the pavement around the well, and determining the size of the maintenance device;
prefabricating and maintaining devices, and transporting to a construction site;
milling the pavement around the well, trimming the milled wall and bottom of the well, coating emulsified asphalt binder on the wall and bottom of the well, paving the maintenance device to the trench by using a crane under the cooperation of a hoisting head and an alignment plate, compacting, and filling the emulsified asphalt binder into the joint; leveling gaps and cleaning the field.
As a further technical scheme, after the bottom of the tank is trimmed, the milled bottom surface is leveled by adopting machine-made sand.
As a further technical scheme, an electric telescopic rod is arranged in the hoisting head, when the maintenance device is installed, the electric telescopic rod is firstly made to extend out of a reserved hole site penetrating into the second structural layer, the alignment plate is placed at the wellhead of the inspection well after being lifted, a laser emitter at the bottom of the hoisting head emits laser to be aligned with the center of the alignment plate, the maintenance device is placed after the alignment plate is withdrawn, the electric telescopic rod retracts after the alignment plate is in place, and the hoisting head is withdrawn.
The beneficial effects of the invention are as follows:
(1) the lower structure of the maintenance device is a reinforced concrete structure layer, so that overlarge local bending tensile stress generated when a vehicle passes through an inspection well and a well cover is effectively resisted, and the defects of cracking, sinking, crushing and the like of a road surface around the well are greatly reduced; meanwhile, the stress diffusion effect of the reinforced concrete effectively reduces the pressure stress transmitted to the shaft, and reduces the settlement and structural damage of the inspection well.
(2) The upper structure of the maintenance device is a fiber composite modified asphalt concrete structure layer, a macro-micro cross-scale fiber composite modification enhancing technology is adopted, the aggregate proportion is optimized, the low-temperature bending tensile strength and fatigue life are good, the toughness is good, the strength is high, the fatigue resistance and water damage resistance of an asphalt mixture can be effectively improved, the service life of the pavement around the well is remarkably prolonged, and various diseases on the pavement around the well are effectively reduced.
(3) The fiber composite modified asphalt concrete structure layer is modified by basalt fiber, the tensile strength and toughness of SMA are greatly improved through the reinforcement effect, the high-temperature resistance is good, the anti-rutting capability of SMA is further improved, and the basalt fiber serving as a novel environment-friendly road mineral fiber has good physical and chemical properties, so that the mechanical property, the stability and the high and low temperature properties of the SMA mixture can be greatly improved, the basalt fiber can be recycled, and the use cost is reduced.
(4) According to the invention, the hoisting head is adopted to hoist the maintenance device, so that the maintenance device can be quickly and accurately installed, after the maintenance device is damaged, the lower part structure is of a reinforced concrete structure, and the area of the pavement around the well is a weak part of the road, so that the maintenance device cannot be taken out by adopting a crushing technology, the maintenance device can be easily taken out and replaced by adopting the hoisting head, and the maintenance of secondary damage of the pavement around the well can be ensured to be quickly completed.
(5) The maintenance device provided by the invention determines the size according to the actual conditions of the inspection well and the pavement around the well, is prefabricated and molded in a factory, is directly transported to the site for pavement after maintenance, can quickly finish maintenance operation, has higher strength, greatly improves the maintenance quality of the inspection well and the pavement around the well, and obviously improves the economic benefits of the whole life cycle of the inspection well and the pavement around the well.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic cross-sectional view of a roadway manhole and a periwell roadway maintenance device according to one or more embodiments of the present invention;
FIG. 2 is a schematic representation of the geometry of a first structural layer and a second structural layer of the present disclosure in accordance with one or more embodiments;
FIG. 3 is a schematic plan view of a reinforced concrete structural layer reinforcing bar arrangement according to one or more embodiments of the present invention;
FIG. 4 is a schematic cross-sectional view of a reinforced concrete structural layer according to one or more embodiments of the present invention;
FIG. 5 is a schematic view of a threaded rod construction according to one or more embodiments of the present disclosure;
FIG. 6 is a schematic illustration of a nut construction according to one or more embodiments of the present invention;
figure 7 is a schematic view of the overall construction of a lifting head according to one or more embodiments of the invention;
figure 8 is a bottom view of the lifting head of the invention according to one or more embodiments;
FIG. 9 is a schematic view of an alignment plate of the invention according to one or more embodiments;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
wherein, 1, the well cover; 2. a well base; 3. a threaded rod; 4. a nut; 5. a fiber composite modified asphalt concrete structure layer; 6. a reinforced concrete structural layer; 7. connecting holes; 8. an electric telescopic rod; 9. a laser transmitter; 10. a cross center point; h11, a first annular rib; h12, second annular bead; h13, third annular rib; h14, fourth annular rib; G. hooping; D. and reserving hole positions for the electric telescopic rod.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As mentioned in the background art, the maintenance of the conventional inspection well and the pavement around the inspection well has the problems that the maintenance time is too long, the maintenance cost for the inspection well and the pavement around the inspection well is huge every year in the municipal road maintenance, and the maintenance is still damaged again in a short period.
Example 1
In a typical embodiment of the present invention, as shown in fig. 1 to 9, there is provided a maintenance device for a road manhole and a surface around the manhole, including: a prefabricated reinforced concrete structural layer 6 (i.e. the second structural layer) and a prefabricated fibre composite modified asphalt concrete structural layer 5 (i.e. the first structural layer).
The reinforced concrete structure layer is a cement concrete structure with continuous reinforcement and is a main bearing part of vehicle load, and the fiber composite modified asphalt concrete structure layer mainly plays a role in ensuring the driving comfort of the inspection well and the road surface around the inspection well.
The reinforced concrete structure layer is positioned at the lower part of the fiber composite modified asphalt concrete structure layer and is produced according to the design size in a factory, and the reinforced concrete structure layer and the fiber composite modified asphalt concrete structure layer form an assembled structure body for maintenance of an inspection well and a pavement around the inspection well.
It is understood that the specific size of the fabricated structure is determined according to the size of the manhole to be maintained, and is not limited thereto.
The joint of the fabricated structure body and the original pavement of the lower part of the fabricated structure body is bonded into a whole by adopting SBS modified emulsified asphalt as a bonding agent, the well seat 2 is directly fixed on the upper surface of the reinforced concrete structure, and the stress transmitted to the shaft is greatly reduced by utilizing the stress diffusion effect of the reinforced concrete structure, so that the settlement of the inspection well is reduced.
Specifically, the reinforced concrete structure layer 6 and the fiber composite modified asphalt concrete structure layer 5 are both circular ring structures, the sizes of the inner rings of the reinforced concrete structure layer and the fiber composite modified asphalt concrete structure layer are the same, the sizes of the outer rings of the reinforced concrete structure layer and the fiber composite modified asphalt concrete structure layer are the same, and the sizes of the inner rings of the reinforced concrete structure layer and the fiber composite modified asphalt concrete structure layer are the same as that of the well lid 1.
The reinforced concrete structure layer is composed of a reinforced cage and concrete, wherein the reinforced cage is composed of a plurality of layers of annular reinforcements and stirrups G, the reinforced cage is a circular column-shaped frame structure, concrete layers are arranged inside and outside the frame structure, and the concrete layers are formed by casting inside and outside the reinforced cage; in the embodiment, the annular ribs are provided with four layers, namely a first annular rib H11, a second annular rib H12, a third annular rib H13 and a fourth annular rib H14, and the stirrups are arranged among the annular ribs in multiple layers at certain intervals; and paving a fiber composite modified asphalt concrete structure layer with a set thickness on the upper part of the reinforced concrete structure layer, and compacting and molding by adopting a hydraulic compactor.
The bottom of the well seat is provided with a base which extends outwards from the bottom of the well seat along the radial direction and is also annular; evenly be equipped with connecting hole 7 in the base circumference, the threaded rod 3 (being the connecting piece) is pre-buried to the corresponding position of reinforced concrete structural layer and connecting hole for the threaded rod passes the connecting hole and utilizes nut 4 (being the fastener) to fix, thereby makes well seat 2 fixed mounting at the top of reinforced concrete structural layer 6.
The periphery of the well seat is fixed by the fiber composite modified asphalt concrete structure layer, and the top of the fiber composite modified asphalt concrete structure layer is flush with the top of the well seat, so that unevenness of the pavement around the well is avoided.
Through the setting of assembled structure for inspection shaft and well week road surface disease obtain quick restoration, when the vehicle load acted on well lid and well week road surface, assembled structure and lower part road surface structure born whole load to effectively spread the load, pit shaft and well body do not bear the vehicle load, can prolong road inspection shaft and well week road surface life, reduce maintenance cycle, improve life cycle economic benefits.
In order to be able to be fast, the installation of accurate completion curing means, adopt hoist device to hoist it, specifically as follows:
the hoisting device comprises a hoisting head and an alignment plate, wherein the lower end of the hoisting head is provided with a plurality of electric telescopic rods 8, the electric telescopic rods 8 are arranged at intervals of 60 degrees along the circumference of the hoisting head, a plurality of electric telescopic rod reserved hole sites D are correspondingly arranged on the middle position of the inner side wall of the second structural layer of the assembly type structural body, and the electric telescopic rods 8 stretch into the reserved hole sites, so that the assembly type structural body can be hoisted quickly.
The electric telescopic rod of the hoisting head is of a cylindrical structure with the diameter of 8cm and the length of 60cm, and correspondingly, the reserved hole position D of the electric telescopic rod is of a cylindrical groove structure with the diameter of 8cm and the length of 60 cm.
In this embodiment, the electric telescopic rod 8 adopts the existing device, and the telescopic action of the electric telescopic rod 8 is controlled through the control rod on the crane.
The top of the hoisting head is connected with a crane, and the center of the bottom of the hoisting head is provided with a laser emitter 9 for emitting laser; the alignment plate is a white rubber plate, the center of the alignment plate is provided with a cross central point 10, and when laser emitted by the laser emitter 9 falls on the cross central point 10 of the alignment plate, the assembled structure body and the inspection well are quickly aligned.
It can be understood that the fabricated structure and the inspection well are concentrically arranged and matched in size as long as the center is ensured to be aligned, therefore, the alignment plate is placed at the top of the inspection well, the diameter of the alignment plate is the same as the diameter of the outer circle of the inspection well, and the cross central point 10 is effectively ensured to be located at the center of the inspection well.
Hoisting device and electric telescopic handle reserve hole site D's setting has not only realized the quick installation of assembled structure, the change of the curing means of still being convenient for, after curing means takes place to destroy, because substructure (be the second structural layer) is reinforced concrete structure, and the well week road surface region is the weak position of road, should not adopt broken technique to take out, the hoist and mount head in this embodiment can easily take out the change with curing means, can guarantee that the maintenance of well week road surface secondary destruction is accomplished fast.
In order to more clearly describe the design and production process of the fabricated structure, the present embodiment will be described by taking inspection wells and pavement around the wells of 4 urban roads in a certain city as an example.
Disease scope investigation is carried out on inspection wells and well surrounding pavements of 4 urban roads in a certain city, wherein each of 3 urban roads is provided with 100 inspection wells, each of 2 roads is provided with 300 inspection wells, disease radius R (distance from the center of a well cover to the disease position of the well surrounding pavement) is determined, and the investigation finds that the disease radius of the inspection wells and the well surrounding pavements is mainly distributed between 0.6cm and 0.8cm, the minimum is 0.4cm, and the maximum can reach 1.2 cm.
Carrying out inspection well and well periphery road surface condition investigation, determining a road surface structural layer and thickness, and obtaining upper structural layer thickness a, lower structural layer thickness b and well cover radius r; thereby obtain the geometry of road inspection shaft and well periphery road surface assembled structure: thickness a + b, outer radius R, inner radius R, as shown in fig. 2.
The method comprises the steps of designing an assembly type structure according to actual needs, producing assembly type structures with different sizes in a factory according to design sizes so as to be suitable for repairing pavements with different well peripheral pavement damage ranges, wherein specific serial numbers and geometric sizes are shown in the table 1, and determining the well peripheral pavement damage repairing range according to well peripheral pavement damage investigation results during repairing.
TABLE 1 summary of dimensions of fabricated structures
It is understood that the dimensions of the fabricated structure in the present embodiment are only given in several different cases to facilitate understanding of the design principle of the dimensions of the fabricated structure, and are not limited to the above dimensions, and in other embodiments, the specific dimensions of the fabricated structure are determined according to the size of the manhole.
After the concrete size design of the fabricated structure is finished, prefabricating the fabricated structure of each number in a factory, firstly rolling a reinforcement cage of a lower reinforced concrete structure layer, arranging annular ribs with the intervals of 40cm, 40cm and 60cm in sequence and hooping with the interval of 30 degrees, wherein the thickness of a concrete protective layer at the periphery is 5cm, pouring a hollow cylindrical base layer with the height of 34cm, the outer radius of R and the inner radius of R by using C40 concrete as shown in figures 3-4, pre-burying a threaded rod for connecting a well seat and the reinforced concrete structure layer in the concrete, after curing for 28 days by a wet method, adopting a straight-bearing well cover and a well seat in CJ/T511-2017 (cast iron inspection well cover), fixing the well seat and the well cover on the top of the reinforced concrete structure layer by using a nut, paving a fiber composite modified hot-mix asphalt surface layer with the length of 6cm on the top of the reinforced concrete structure, compacting and forming by adopting a hydraulic pressure type, as shown in fig. 1.
In the embodiment, the annular ribs are phi 14, the stirrups are phi 12, and the reinforcement cage is bound by adopting a binding mode.
The reinforced concrete structure layer has the characteristics of high structural strength, high bending tensile strength and good stress diffusion capacity, so that the repair capacity of the fabricated structure body is more outstanding, the stress transmitted to a shaft can be greatly reduced by utilizing the stress diffusion effect of the reinforced concrete structure, and the settlement of the inspection well is reduced.
The fiber composite modified hot-mixed asphalt concrete structure layer is used for an upper structure of an assembled structure for pavement road inspection wells and maintenance of road surfaces around the wells, and mainly comprises asphalt, a toughening component, stone and an anti-stripping agent.
Wherein, the asphalt is one of CF (micro carbon fiber powder)/SBS composite modified asphalt and SBR/CF/SBS composite modified asphalt, the toughening component is one of basalt fiber, polyester fiber and lignin fiber, the stone is skeleton compact stone configured according to the conventional SMA-10 grading design requirement, and the anti-stripping agent is cement, mineral powder and the like.
In the fiber composite modified hot-mix asphalt concrete structure layer, the content of asphalt accounts for 5-7%, and the asphalt comprises the following components in percentage by weight: the SBS content is 5-7%, the CF content is 0.6-1.0%, and the SBR content is 1-2%; the content of the toughening component accounts for 0.3 to 0.5 percent; among the anti-stripping agents: 1-3% of cement and 7-10% of mineral powder; the balance being stone material.
When the fiber composite modified hot-mix asphalt concrete structure layer is prepared, pavement performance evaluation is required to obtain the optimal component ratio, 4 components are selected in the embodiment, and 4 parallel tests are designed for pavement performance test.
Component 1: 0.8% of CF + 6% of SBS composite modified asphalt, 0.4% of basalt fiber, 89.6% of stone, 2% of cement and 8% of mineral powder.
And (2) component: 2% of SBR + 0.8% of CF + 5% of SBS composite modified asphalt, 0.4% of basalt fiber, 89.6% of stone, 2% of cement and 8% of mineral powder.
And (3) component: 0.8% of CF + 6% of SBS composite modified asphalt, 0.4% of polyester fiber, 89.6% of stone, 2% of cement and 8% of mineral powder.
And (4) component: 0.8% of CF + 6% of SBS composite modified asphalt, 0.4% of lignin fiber, 89.6% of stone, 2% of cement and 8% of mineral powder.
The 4 components are prepared into a fiber composite modified hot-mix asphalt concrete structure layer according to the following process:
(1) independently mixing asphalt and stone for 30 s;
(2) adding macroscopic fibers and continuously mixing for 60 s;
(3) adding mineral powder and cement and mixing for 90 s.
Carrying out pavement performance evaluation on the fiber composite modified hot-mix asphalt concrete structure layer prepared from the 4 components, specifically, evaluating the water stability of each part by using a water-soaking Marshall test and a water-soaking Marshall residual stability; evaluating the low-temperature bending and stretching performance of each part by adopting a low-temperature trabecula test and using the bending failure strain of the low-temperature trabecula; the fatigue properties of each part were evaluated by four-point bending fatigue test and the results are shown in table 2.
TABLE 2 comparative analysis table of road surface property
As can be seen from Table 2: among the 4 components, the 1 st component is superior to other components in the water immersion Marshall residual stability, low-temperature trabecular bending failure strain and four-point bending fatigue life, and the fiber composite modified SMA-10 asphalt concrete structure layer of 0.8 percent of CF +6 percent of SBS composite modified asphalt, 0.4 percent of basalt fiber, 89.6 percent of stone, 2 percent of cement and 8 percent of mineral powder has good low-temperature bending tensile strength, fatigue property and water stability, and can meet the requirements of special working environments of inspection wells and well peripheral pavements.
The basalt fiber serving as a novel environment-friendly road mineral fiber has good physical and chemical properties, can greatly improve the mechanical property, stability and high and low temperature properties of the SMA mixture, and can be recycled.
Example 2
The embodiment provides a use method of a maintenance device for a road inspection well and a road surface around the well, which specifically comprises the following steps:
step 1: detecting the disease range of the inspection well and the pavement around the inspection well which need to be maintained, and providing data support for selecting the size of the fabricated structure of the inspection well and the pavement around the inspection well;
step 2: on the basis of the data obtained in the step 1, preparing prefabricated blocks of the road inspection well and the surrounding road surface assembly type structure body with proper sizes in a factory and transporting the prefabricated blocks to a construction site;
and step 3: milling the pavement around the well by using a milling machine, wherein the milling radius is slightly larger than the radius of the precast block in the step 2 so as to facilitate installation of the precast block;
and 4, step 4: after milling and planing are finished, removing pavement waste materials, trimming and leveling milled groove walls, wiping the groove walls with wet cleaning cloth, removing scraps and dust, cleaning and leveling the groove bottoms and leveling before paving the prefabricated blocks, screening and cleaning medium sand, wherein the sand grains are required to be hard and clean, leveling the milled bottom surface with the sand, and controlling the thickness within 3 mm;
and 5: wiping the side surfaces of the inspection well and the prefabricated block of the assembled structure body on the road surface around the inspection well by using a wet cleaning cloth, removing dust, and spraying a layer of SBS modified emulsified asphalt binder on the wall and the bottom of the groove;
step 6: hoisting the assembly type structure by adopting a hoisting machine under the matching of the hoisting head and the alignment plate, wherein a telescopic rod of the hoisting head penetrates into a reserved hole position of a second structure layer of the assembly type structure, the hoisting machine moves the prefabricated block to the upper part of the well cover, and the alignment plate is placed at the well mouth of the inspection well;
and 7: a laser emitter on the bottom surface of the hoisting head emits red laser, the crane is adjusted to enable the laser to fall on the center of the cross line of the alignment plate, and the alignment plate is removed;
and 8: the crane descends to form an assembled structure, after the assembled structure reaches the bottom of the groove, the telescopic rod is controlled to retract and withdraw, and SBS modified emulsified asphalt binder is filled into the joints of the new road surface and the old road surface;
and step 9: slightly compacting by using a compactor, then pouring the conventional SBS modified emulsified asphalt binder into the seams, leveling the seams, cleaning the field and opening the traffic.
It can be understood that, in this embodiment, for simplicity, the glue filling operation in step 8 and step 9 is performed only once, and in practical application, step 8 and step 9 are repeated for a selected number of times according to the actual caulking effect until the gap is leveled.
The maintenance device can realize quick repair of the defects of the inspection well and the road surface around the inspection well, and when the vehicle load acts on the well cover and the road surface around the inspection well, the assembled structure and the lower part of the road surface structure bear all the load, the load is effectively diffused, the shaft and the well body do not bear the vehicle load, the service life of the road inspection well and the road surface around the inspection well can be prolonged, the maintenance period is shortened, and the economic benefit of the whole life cycle is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (10)
1. A maintenance device for a road inspection well and a pavement around the well is characterized by comprising a first structural layer and a second structural layer which are adjacently arranged up and down, wherein the first structural layer and the second structural layer are both of annular structures, a connecting piece is embedded in the top of the second structural layer, the top of the connecting piece is embedded in the first structural layer, and a fastening piece is fixedly arranged on the top of the connecting piece; the second structural layer comprises a cylindrical frame structure, and concrete layers are arranged inside and outside the frame structure.
2. A maintenance device for road manhole and well pavement as claimed in claim 1, wherein said frame structure comprises a plurality of layers of annular ribs, said annular ribs being spaced apart from each other, and hoops being connected between said annular ribs.
3. A maintenance device for road manhole and well surrounding road surface as claimed in claim 1, wherein the first and second structural layers have the same inner diameter and the same outer diameter.
4. The maintenance device for the road manhole and the surrounding road surface of the well as claimed in claim 1, wherein the second structural layer is provided with a reserved hole site on the inner side wall.
5. A maintenance device for road manhole and well pavement as claimed in claim 1, wherein said first structural layer is made of fiber composite modified asphalt concrete; the fiber composite modified asphalt concrete comprises asphalt, a toughening component, stone and an anti-stripping agent.
6. The maintenance device for the road manhole and the well periphery as claimed in claim 5, wherein the asphalt is one of CF/SBS modified asphalt and SBR/CF/SBS modified asphalt.
7. The maintenance device for the road manhole and the periwell pavement as claimed in claim 5, wherein the toughening component is one of basalt fiber, polyester fiber and lignin fiber, and the anti-stripping agent is cement or mineral powder.
8. The maintenance device for the road manhole and the surrounding road surface of the well as claimed in claim 1, wherein a well seat is buried in the first structural layer, a base is provided at the bottom of the well seat, the base is disposed on the top of the second structural layer, the base is uniformly provided with connecting holes in the circumferential direction, and the connecting members pass through the connecting holes; the top of the first structural layer is flush with the top of the well base.
9. Use of a maintenance device for road manhole and well-around road surfaces according to any of claims 1 to 8, characterized in that it comprises the following steps:
detecting the disease range of the inspection well to be maintained and the pavement around the well, and determining the size of the maintenance device;
prefabricating and maintaining devices, and transporting to a construction site;
milling the pavement around the well, trimming the milled wall and bottom of the well, coating emulsified asphalt binder on the wall and bottom of the well, paving the maintenance device to the trench by using a crane under the cooperation of a hoisting head and an alignment plate, compacting, and filling the emulsified asphalt binder into the joint; leveling gaps and cleaning the field.
10. The use method of claim 9, wherein an electric telescopic rod is arranged in the hoisting head, when the maintenance device is installed, the electric telescopic rod is firstly made to extend out and penetrate through the reserved hole of the second structural layer, after the electric telescopic rod is hoisted, the alignment plate is placed at the wellhead of the inspection well, the laser transmitter at the bottom of the hoisting head emits laser to be aligned with the center of the alignment plate, after the alignment plate is withdrawn, the maintenance device is put down, after the electric telescopic rod is put in place, the electric telescopic rod retracts, and the hoisting head is withdrawn.
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