CN110644309B - Roadbed drainage structure, system and construction method - Google Patents
Roadbed drainage structure, system and construction method Download PDFInfo
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- CN110644309B CN110644309B CN201910917573.3A CN201910917573A CN110644309B CN 110644309 B CN110644309 B CN 110644309B CN 201910917573 A CN201910917573 A CN 201910917573A CN 110644309 B CN110644309 B CN 110644309B
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- roadbed
- absorption film
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- pipe
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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
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
- E02D3/103—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains by installing wick drains or sand bags
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/17—Geometrical or physical properties including an electric conductive element
Abstract
The invention discloses a roadbed drainage structure, a roadbed drainage system and a roadbed drainage construction method, wherein the roadbed drainage structure comprises an absorption film, the absorption film is arranged in a soil body of a roadbed and comprises a plurality of hollow pipes with axes arranged in parallel, the pipe wall of each hollow pipe is provided with a plurality of through holes, the through holes contacting with the roadbed soil body are used for reducing the diameter of capillary tubes in the roadbed soil body, so that water in the roadbed soil body around the absorption film is sucked into the hollow pipes through the through holes, and the two ends of each hollow pipe are used for discharging the water in the hollow pipes; the absorption film is arranged at the junction of different layers of the roadbed, and the inner diameter of the capillary in the roadbed soil body is reduced through the micron-sized through holes arranged on the hollow pipe, so that water is concentrated in the hollow pipe and is discharged through the two ends of the middle pipe, and the water content in the roadbed soil body is effectively reduced.
Description
Technical Field
The application relates to the field of road engineering, in particular to a roadbed drainage structure, a roadbed drainage system and a construction method.
Background
After the road is paved and the vehicle is driven, the roadbed and the accessory equipment are in a firm and stable state, the state inside the roadbed can be changed along with the increase of the service time of the road, and the changes directly influence the driving of the road and the maintenance of the roadbed in the later period.
The inventor finds that with the continuous increase of traffic volume and vehicle loading capacity, the requirement on a highway subgrade, particularly long-term service performance, is higher and higher, but in the long-term service process, along with the increase of time, the humidity inside the subgrade is gradually increased to a balanced humidity state from an optimal state during construction, the water content is increased by 4% -8%, the bearing capacity and the deformation resistance of the subgrade are reduced, the internal humidity is difficult to adjust in the subgrade maintenance process, the performance inside the subgrade cannot meet the requirement, and the service life of the subgrade and a pavement structure is shortened.
Disclosure of Invention
The purpose of this application is to the defect that prior art exists, provides a road bed drainage structure, system and construction method, reduces the internal diameter of capillary in the road bed soil body through the micron order through-hole of arranging on the hollow tube to make moisture concentrate inside the hollow tube and discharge through well pipe both ends, effectively reduce the inside moisture content of road bed soil body.
The first purpose of this application is to provide a road bed drainage structures, adopts following technical scheme:
the absorption film comprises a plurality of hollow tubes with axes arranged in parallel, a plurality of through holes are arranged on the tube wall of each hollow tube, the through holes are in contact with the roadbed soil body and are used for reducing the diameter of capillary tubes in the roadbed soil body, so that moisture in the roadbed soil body around the absorption film is sucked into the hollow tubes through the through holes, and the two ends of each hollow tube are used for discharging the moisture in the hollow tubes; the absorption film is arranged at the junction of different layers of the roadbed. The diameter of the through hole is micron-sized.
Furthermore, the absorption film is a film-shaped structure formed by stacking a plurality of hollow pipes in a flush manner, the outer circumferential surfaces of the adjacent hollow pipes are tangent, the axial length of each hollow pipe is the width of the absorption film, the thickness of the absorption film is larger than the diameter of the hollow pipe, the width of the absorption film is equal to the width of a roadbed at the arrangement position, and the hollow pipes are stacked and extended along the extending direction of a road to form the absorption film.
Furthermore, two ends of the hollow pipe respectively extend to the slope surface, are connected with a preset drainage ditch of the circuit base and are used for discharging the water absorbed in the hollow pipe to the drainage ditch through the two ends;
preferably, still include first drain pipe and second drain pipe, the hollow tube both ends communicate respectively has first drain pipe, and first drain pipe arranges along road extending direction, first drain pipe intercommunication second drain pipe, first drain pipe accepts the interior exhaust moisture of hollow tube and discharges outside the road bed through the second drain pipe.
A second object of the present application is to provide a construction method of the roadbed drainage structure, which includes the following steps:
reinforcing the foundation part of the roadbed drainage structure to be paved and leveling the surface;
paving the absorbing film above the foundation along the extending direction of the road, and checking whether the moisture in the absorbing film can be successfully discharged from the two ends of the hollow pipe;
and after the bottommost absorption film is successfully paved, continuously paving soil bodies in layers according to roadbed parameters, and arranging a roadbed drainage structure between adjacent layers until the roadbed drainage structure reaches the upper surface of the roadbed.
Further, in the arrangement of the roadbed, a drainage ditch is arranged at the interface between the roadbed and the foundation, and after the absorbent film is laid, whether the moisture in the absorbent film can be successfully drained into the drainage ditch is checked.
Preferably, the absorption membranes are arranged in sections in the length direction, drain pipes are respectively arranged outside slopes on two sides of the absorption membranes in the width direction, the drain pipes are communicated with hollow pipes of the absorption membranes, and the water in the absorption membranes is received and discharged to a drainage facility.
The third purpose of this application is to provide a utilize above-mentioned road bed drainage system of road bed drainage structures, adopts following technical scheme:
including road bed drainage structures, power and electrode structure, electrode structure includes positive electrode structure and negative electrode structure, positive electrode structure and negative electrode structure correspond respectively and arrange in the absorption membrane of difference, and the electrode structure polarity that adjacent absorption membrane corresponds is opposite in the road bed direction of height.
Furthermore, the electrode structure comprises a plurality of carbon fiber rods and copper sheets, the carbon fiber rods are arranged in the hollow pipe, gaps are reserved between the carbon fiber rods and the hollow pipe, the carbon fiber rods arranged on the same absorption film are electrically connected with the same electrode of the power supply through the copper sheets, the different electrodes of the power supply are correspondingly connected through the different absorption films, the copper sheet connected with the positive pole of the power supply and the corresponding carbon fiber rods form a positive pole structure, and the copper sheet connected with the negative pole of the power supply and the corresponding carbon fiber rods form a negative pole structure.
A fourth object of the present application is to provide a construction method of the roadbed drainage system, which includes the following steps:
assembling the electrode structure with the absorption film;
reinforcing the foundation part of the roadbed drainage system to be paved and leveling the surface;
paving an absorption film with a switching electrode structure above the foundation along the extending direction of the road;
respectively carrying out insulation treatment outside the slopes on two sides in the width direction of the absorption film, and checking whether the water in the absorption film can be successfully discharged from two ends of the hollow pipe or not;
after the absorption film is successfully paved, carrying out power-on detection on the electrode structure;
continuously laying soil bodies in layers according to roadbed parameters, and arranging a roadbed drainage system between adjacent layers until the soil bodies reach the upper surface of the roadbed;
after the pair of positive electrode structure and negative electrode structure is mounted, the energization detection is performed immediately.
Furthermore, the carbon fiber rods and the hollow pipe are coaxially arranged, and a plurality of carbon fiber rods corresponding to the same absorption film are arranged in the hollow pipe along the extending direction of the road;
further, in the arrangement of the roadbed, a drainage ditch is arranged at the interface between the roadbed and the foundation, and after the absorbent film is laid, whether the moisture in the absorbent film can be successfully drained into the drainage ditch is checked.
Preferably, the absorption membranes are arranged in sections in the length direction, drain pipes are respectively arranged outside slopes on two sides of the absorption membranes in the width direction, the drain pipes are communicated with hollow pipes of the absorption membranes, and the water in the absorption membranes is received and discharged to a drainage facility.
Compared with the prior art, the application has the advantages and positive effects that:
(1) the absorption film is applied to roadbed drainage reinforcement, the diameter of capillary tubes in the roadbed is reduced through the through holes with micron-sized apertures, the capillary suction force is increased, water in soil around the arranged absorption film is fully sucked into the hollow tubes and discharged through the pipelines, and the water content in the soil in the roadbed is reduced, so that the strength of the roadbed is greatly improved, the service performance of the roadbed is improved, and the service life of the roadbed is prolonged;
(2) the absorption films are respectively arranged among different roadbed layers, so that the capillary suction force is improved, the moisture in soil above the absorption films can be accelerated by matching with the gravity, partial gravity action can be overcome, the moisture in the partial area below the absorption films can enter the absorption films, and the absorption effect is improved;
(3) the first pipeline is adopted to receive the water discharged from the hollow pipe and the water is discharged from the hollow pipe through the second pipeline in a centralized manner, so that the problem of slope soil body loss caused by direct water discharge at two ends of the hollow pipe is avoided;
(4) the electrodes are arranged in the hollow pipes as fillers, potential differences are formed among different layers of the roadbed, under the potential differences, moisture in the soil body is acted by an electric field force, and the moisture can move to the absorption layer in an accelerating mode, so that the moisture in the roadbed can be discharged more quickly and effectively, the moisture content of the soil body in the roadbed is reduced, and the strength of the roadbed is guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic layout of a roadbed drainage structure according to embodiment 1 of the present application;
FIG. 2 is a schematic structural view of a hollow tube according to example 1 of the present application;
fig. 3 is a schematic structural view of an electrode structure according to embodiment 3 of the present application;
fig. 4 is a schematic view of the construction of a roadbed drainage system in embodiment 4 of the present application;
FIG. 5 is a schematic view of the structure of example 1 of the present application when drainage is performed by using a drainage ditch;
fig. 6 is a schematic structural view of embodiment 3 of the present application when drainage is performed by a drainage ditch.
Wherein: 1. 1-1 parts of an absorption film, 2 parts of a hollow pipe, 2 parts of a drain pipe, 3 parts of a drainage ditch, 4 parts of a through hole, 5 parts of an electrode structure, 5-1 parts of a copper sheet, 5-2 parts of a carbon fiber rod, 5-3 parts of a lead, 5-4 parts of a power supply, 6 parts of an anode structure, 7 parts of a cathode structure.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced in the background art, in the prior art, with the continuous increase of traffic volume and vehicle load capacity, the requirement for a highway subgrade, particularly long-term service performance, is higher and higher, but in the long-term service process, with the increase of time, the internal humidity of the subgrade is gradually increased from the optimal state during construction to the balanced humidity state, the water content is increased by 4% -8%, so that the bearing capacity and the deformation resistance of the subgrade are reduced, and the internal humidity is difficult to adjust in the subgrade maintenance process, so that the internal performance of the subgrade cannot meet the requirement, the service life of the subgrade and a pavement structure is shortened.
Example 1
In an exemplary embodiment of the present application, as shown in fig. 1 to 2, a roadbed drainage structure using a hollow geomembrane is proposed.
As shown in fig. 1, the drainage structure includes an absorption film 1 and a drainage pipe 2 formed by hollow pipes 1-1, both ends of the hollow pipes are communicated with the drainage pipe, and the pipe wall of the hollow pipe is provided with densely distributed micro-aperture openings, so that after the hollow pipe is buried in the roadbed, the micro-aperture openings reduce the diameter of capillaries formed in the roadbed, thereby obtaining capillaries with smaller pipe diameters, increasing the suction force of the capillaries, sucking the water in the soil around the arranged geomembrane into the hollow pipe, and discharging the absorbed water out of the roadbed through the drainage pipes at both ends, reducing the water content in the soil of the roadbed, improving the humidity inside the roadbed to keep a better state, ensuring the strength of the roadbed, and improving the service life and bearing capacity of the roadbed.
Specifically, the hollow tube can be made of PVDF hollow geomembrane, the pipe wall of the single hollow geomembrane is fully distributed with micron-sized small-hole geomembrane which is originally applied to the field of municipal sewage treatment, and the micron-sized pore diameter on the membrane is used for filtering substances such as impurities, microorganisms and the like. This application is applied to this kind of geomembrane in the subgrade drainage adds the muscle, through the capillary diameter in the dirt road bed is greatly reduced in the micron order aperture, increases capillary suction, fully will arrange in the moisture suction hollow tube in the soil body around the geomembrane, through the pipeline discharge, greatly reduced the moisture content in the soil body in the subgrade to improve the intensity of subgrade by a wide margin, and then improve the serviceability and the life-span of subgrade.
The absorbing film is made by stacking a plurality of hollow pipes 1-1 made of PVDF materials in parallel along the axial line, the whole absorbing film is of a film-shaped structure with a certain thickness, the pipe wall of each hollow pipe 1-1 is provided with a micron-sized through hole 4, the aperture of the hollow pipe is 0.1-0.4 mu m, the thickness of each layer of absorbing film is 3cm, namely, when the absorbing film is laid, a certain number of hollow pipes are stacked in the thickness direction, so that the absorbing film integrally forms the required thickness, the hollow pipes 1-1 in the absorbing film 1 are parallel to the transverse direction of the roadbed, are stacked along the extension direction of the roadbed to increase the length of the absorbing film, and are laid in sections, the sections are fixed in length, as shown in the figure, the absorbing film is arranged on three interfaces, namely, the interface of the roadbed and the upper structure, the interface of the embankment and the interface of the roadbed, and the interface of the roadbed and the foundation and the roadbed, and the drain pipes are changed according to the arrangement position of the absorbing film, drainage pipes 2 are provided at the bed-to-superstructure interface, embankment-to-bed interface, and drainage gutters 3 are provided at the foundation-to-subgrade interface.
The drainage pipe 2 is a drainage channel which is transversely and longitudinally connected, firstly, the drainage pipe is perpendicular to the hollow fiber pipes 1-1 and arranged at two interface positions, the first drainage pipe is arranged at two sides of a side slope, a seam is cut along the axial direction of the first drainage pipe, so that hollow fiber membranes exceeding the side slope part completely enter the first drainage pipe, the hollow fiber membranes are tightly connected together by waterproof glue with strong adhesive force, water can completely flow into the first drainage pipe, the first drainage pipe is communicated with a second drainage pipe arranged along the slope surface, and the water is directly introduced into a drainage ditch through slope surface drainage.
Of course, it can be understood that when the drainage ditch structure is preset on the roadbed, the drainage pipe structure can be cancelled, the two ends of the hollow pipe respectively extend to the slope surface, and the drainage ditch together with the drainage ditch structure preset on the roadbed receives the water absorbed in the hollow pipe and discharges outside the roadbed structure.
Further, the outer periphery of the hollow pipe is tangentially connected and tightly connected, so that the soil rolling layer is not damaged by pressure when being laid on the hollow pipe, the axial length of the hollow pipe is the width of the absorption film, the thickness of the absorption film is larger than the diameter of the hollow pipe, the width of the absorption film is equal to the width of the roadbed at the arrangement position, and the hollow pipe is stacked along the extending direction of the road to prolong the length of the absorption film.
Furthermore, when the absorption film is arranged, the absorption film can be reinforced by fixing two ends of the absorption film.
Through set up the absorption film respectively between the road bed layering of difference, improve capillary suction, can cooperate the moisture in the soil body above the gravity acceleration absorption film to can overcome partial action of gravity, make the moisture in the lower regional of absorption film inside get into the absorption film, improve the absorption effect.
Example 2
In an exemplary embodiment of the present application, there is provided a construction method using the roadbed drainage structure of the embodiment 1, including the steps of:
reinforcing the foundation part of the roadbed drainage structure to be paved and leveling the surface;
paving the absorbing film above the foundation along the extending direction of the road, and checking whether the moisture in the absorbing film can be successfully discharged from the two ends of the hollow pipe;
and after the bottommost absorption film is successfully paved, continuously paving soil bodies in layers according to roadbed parameters, and arranging a roadbed drainage structure between adjacent layers until the roadbed drainage structure reaches the upper surface of the roadbed.
Further, in the arrangement of the roadbed, a drainage ditch is arranged at the interface between the roadbed and the foundation, and after the absorbent film is laid, whether the moisture in the absorbent film can be successfully drained into the drainage ditch is checked.
Preferably, the absorption film is arranged in sections in the length direction, the drain pipes are respectively arranged outside the slopes on the two sides in the width direction of the absorption film, the drain pipes are communicated with hollow pipes of the absorption film, water in the absorption film is received and discharged to a drainage facility, the first drain pipes are correspondingly arranged on different layers of the same section of the roadbed, and the first drain pipes on the same side of the section share the second drain pipe.
In the above steps, the technical parameters of the laid soil body, such as the water content, the compaction degree, the compaction mode and the like, are the same as those originally set, and depend on the configuration in the road administration planning construction, and the parameter control of the soil body is not the improvement point of the application, and is not repeated herein.
Further, in this embodiment, the thickness of the absorbing film structure is 3 cm.
Example 3
In another exemplary embodiment of the present application, a roadbed drainage system including the roadbed drainage structure of embodiment 1 is provided.
At present, the electroosmosis drainage method is widely applied to the aspects of soft soil consolidation, sludge dewatering, polluted soil body remediation and the like. The electroosmosis drainage method is mostly applied to saturated soil, however, due to the climate and soil quality reasons of China, most of highway subgrades are unsaturated soil subgrades, and therefore the electroosmosis drainage method is applied to the unsaturated soil subgrade by configuring the subgrade drainage system aiming at the problems, and plays the roles of reducing the water content and improving the bearing capacity.
Specifically, the roadbed drainage structure comprises a roadbed drainage structure, a power supply 5-4 and an electrode structure 5, wherein the electrode structure comprises a positive electrode structure 6 and a negative electrode structure 7, the positive electrode structure and the negative electrode structure are respectively and correspondingly arranged in different absorption membranes, and the polarities of the electrode structures corresponding to the adjacent absorption membranes in the roadbed height direction are opposite.
Furthermore, the electrode structure comprises a plurality of carbon fiber rods 5-2 and copper sheets 5-1, the carbon fiber rods are arranged in the hollow pipe, gaps are reserved between the carbon fiber rods and the hollow pipe, the carbon fiber rods arranged on the same absorption film are electrically connected with the same electrode of the power supply through the copper sheets, the different electrodes of the power supply are correspondingly connected through the different absorption films, the copper sheet connected with the positive pole of the power supply and the corresponding carbon fiber rods form a positive pole structure, and the copper sheet connected with the negative pole of the power supply and the corresponding carbon fiber rods form a negative pole structure.
The copper sheet is connected with the carbon fiber rod, the carbon fiber rod is of a rod-shaped structure formed by carbon fiber bundling, carbon fibers are filled into a hollow tube of the PVDF material absorption film, certain holes are reserved, smooth passing of water molecules is guaranteed, the carbon fibers are adopted because the carbon fibers are non-metal materials, the conductive capacity is second only to metal, the resistance is small, the corrosion resistance is high, the rigidity is small, and the carbon fibers can be closely combined with the film structure. The copper sheet is used as connection at the contact part of the lead 5-3 and the carbon fiber, so that the conductivity of the electrode can be improved;
when the electrode structure is manufactured, the carbon fiber tubes corresponding to the same absorption film are integrated, namely, the carbon fibers are connected among the hollow tubes filled with the carbon fibers, so that the problem of looseness of the hollow tube structure caused by homopolar repulsion is avoided.
In this embodiment, when the electrode structure is laid, the cathode structure is laid at the interface between the roadbed and the upper structure, the anode structure is laid at the interface between the embankment and the roadbed, and the other cathode structure is laid at the interface between the foundation and the roadbed, wherein the anode structure is connected with the anode of the power supply through a conducting wire, and the cathode structure is connected with the cathode of the power supply through a conducting wire.
Furthermore, the electric wire part of the electrode structure connected with the power supply is wrapped by a waterproof material and subjected to insulation treatment, so that the danger caused by exposure is avoided; the electrode structure is laid along the longitudinal direction of the roadbed in sections, so that the maintenance and the treatment are convenient when the damage phenomenon occurs, and enough space is reserved between every two sections to eliminate the influence of partial homopolar repulsion; the power supply uses a direct current power supply, in the embodiment, the potential gradient is set to be 1-2.5V/cm, and voltage is applied according to the distance between the anode and the cathode.
Furthermore, drain pipes are arranged on two sides of the side slope at the position of the laid electrode structure, and the arrangement method of the drain pipes is the same as that of the roadbed drain structure.
The absorption films are respectively arranged among different roadbed layers, so that the capillary suction force is improved, the moisture in soil above the absorption films can be accelerated by matching with the gravity, partial gravity action can be overcome, the moisture in the partial area below the absorption films can enter the absorption films, and the absorption effect is improved;
can adopt current domatic drainage structures, with the interior inspiratory moisture of hollow tube through domatic direct drain escape canal in, also can adopt first pipeline to accept the interior exhaust moisture of hollow tube, concentrate through the discharge of second pipeline, avoided the problem that the slope soil body that the direct discharge moisture in hollow tube both ends leads to runs off.
Example 4
In another embodiment of the present application, there is provided a construction method using the roadbed drainage system of embodiment 1, including the steps of:
reinforcing the foundation part of the roadbed drainage system to be paved and leveling the surface;
paving an absorption film with a switching electrode structure above the foundation along the extending direction of the road;
respectively carrying out insulation treatment outside the slopes on two sides in the width direction of the absorption film, and checking whether the water in the absorption film can be successfully discharged from two ends of the hollow pipe or not;
after the absorption film is successfully paved, carrying out power-on detection on the electrode structure;
continuously laying soil bodies in layers according to roadbed parameters, and arranging a roadbed drainage system between adjacent layers until the soil bodies reach the upper surface of the roadbed;
after the pair of positive electrode structure and negative electrode structure is mounted, the energization detection is performed immediately.
Furthermore, the carbon fiber rods and the hollow pipe are coaxially arranged, and a plurality of carbon fiber rods corresponding to the same absorption film are arranged in the hollow pipe along the extending direction of the road.
Further, in the arrangement of the roadbed, a drainage ditch is arranged at the interface between the roadbed and the foundation, and after the absorbent film is laid, whether the moisture in the absorbent film can be successfully drained into the drainage ditch is checked.
Preferably, the absorption membranes are arranged in sections in the length direction, drain pipes are respectively arranged outside slopes on two sides of the absorption membranes in the width direction, the drain pipes are communicated with hollow pipes of the absorption membranes, and the water in the absorption membranes is received and discharged to a drainage facility.
The carbon fibers are connected with the copper sheet and then aggregated into bundles, and the bundles are put into the hollow tube, wherein the diameter of each bundle is slightly smaller than that of the hollow tube, so that the carbon fibers can be conveniently put in, and water molecules can be ensured to be smoothly discharged through the hollow tube.
Of course, it can be understood that before the construction is carried out, whether the relevant materials are qualified or not is checked, including whether the strength (including the joint connection part) of the prepared absorption film material reaches the standard or not, whether the absorption film is damaged or not, whether the structure formed by matching the electrode structure and the absorption film is damaged or not, whether the quality of the absorption film reaches the standard or not and the like. If the material is unqualified, the material is required to be timely exchanged to the material with composite requirement. The thickness of the absorbing film can be adjusted according to the road grade and the traffic level.
The electrodes are arranged in the hollow pipes as fillers, potential differences are formed among different layers of the roadbed, under the potential differences, moisture in the soil body is acted by an electric field force, and the moisture can move to the absorption layer in an accelerating mode, so that the moisture in the roadbed can be discharged more quickly and effectively, the moisture content of the soil body in the roadbed is reduced, and the strength of the roadbed is guaranteed.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A roadbed drainage structure is characterized by comprising an absorption film, wherein the absorption film is arranged in a soil body of a roadbed and comprises a plurality of hollow pipes with axes arranged in parallel, the pipe walls of the hollow pipes are provided with a plurality of through holes, the absorption film is a film-shaped structure formed by the flush and stacking of the end parts of the hollow pipes, and the outer circumferential surfaces of the adjacent hollow pipes are tangent; the through hole which is contacted with the roadbed soil body is used for reducing the diameter of the capillary in the roadbed soil body, so that the moisture in the roadbed soil body around the absorption film is absorbed into the hollow pipe through the through hole, and the two ends of the hollow pipe are used for discharging the moisture in the hollow pipe; the absorption film is arranged at the junction of different layers of the roadbed; and a carbon fiber rod is also arranged in the hollow pipe, and a gap is reserved between the carbon fiber rod and the hollow pipe.
2. The roadbed drainage structure of claim 1, wherein the axial length of the hollow pipe is the width of the absorption film, the thickness of the absorption film is larger than the diameter of the hollow pipe, the width of the absorption film is equal to the width of the roadbed at the arrangement position, and the hollow pipe is stacked and extended along the road extending direction to form the length of the absorption film.
3. The roadbed drainage structure of claim 2, wherein both ends of the hollow pipe extend to the slope surface respectively and are connected with a preset drainage ditch for draining water sucked in the hollow pipe to the drainage ditch through both ends;
still include first drain pipe and second drain pipe, the hollow tube both ends communicate respectively has first drain pipe, and first drain pipe arranges along road extending direction, first drain pipe intercommunication second drain pipe, first drain pipe accepts the interior exhaust moisture of hollow tube and discharges outside the road bed through the second drain pipe.
4. A construction method of a roadbed drainage structure according to any one of claims 1 to 3, comprising the steps of:
reinforcing the foundation part of the roadbed drainage structure to be paved and leveling the surface;
paving the absorbing film above the foundation along the extending direction of the road, and checking whether the moisture in the absorbing film can be successfully discharged from the two ends of the hollow pipe;
and after the bottommost absorption film is successfully paved, continuously paving soil bodies in layers according to roadbed parameters, and arranging a roadbed drainage structure between adjacent layers until the roadbed drainage structure reaches the upper surface of the roadbed.
5. The construction method according to claim 4, wherein a drainage ditch is arranged at an interface between the roadbed and the foundation when the roadbed is arranged, and it is checked whether the moisture in the absorption film is successfully drained into the drainage ditch after the absorption film is laid;
the absorption membranes are arranged in sections in the length direction, the first drainage pipes are correspondingly arranged on the same section of the roadbed in different layers, and the first drainage pipes which are positioned on the same side in the sections share the second drainage pipe.
6. A roadbed drainage system, characterized by comprising the roadbed drainage structure according to any one of claims 1 to 3.
7. The roadbed drainage system of claim 6, wherein the roadbed drainage system further comprises a power supply and an electrode structure, the electrode structure comprises a positive electrode structure and a negative electrode structure, the positive electrode structure and the negative electrode structure are respectively arranged in different absorption films, and the polarity of the electrode structures corresponding to the absorption films adjacent to each other in the roadbed height direction is opposite.
8. The roadbed drainage system of claim 7, wherein the electrode structure comprises a plurality of carbon fiber rods and copper sheets, the carbon fiber rods are arranged in the hollow pipe, gaps are reserved between the carbon fiber rods and the hollow pipe, the carbon fiber rods arranged on the same absorption film are electrically connected with the same electrode of the power supply through copper sheets, different electrodes of the power supply are correspondingly connected through different absorption films, the copper sheet connected with the positive electrode of the power supply and the corresponding carbon fiber rod form a positive electrode structure, and the copper sheet connected with the negative electrode of the power supply and the corresponding carbon fiber rod form a negative electrode structure.
9. The construction method of a roadbed drainage system according to claim 8, characterized by comprising the steps of:
assembling the electrode structure with the absorption film;
reinforcing the foundation part of the roadbed drainage system to be paved and leveling the surface;
paving an absorption film with an assembled electrode structure above the foundation along the extending direction of the road;
arranging drain pipes outside the slopes on the two sides of the absorption film in the width direction respectively, and checking whether the water in the absorption film can be successfully drained into the drain pipes or not;
after the absorption film and the drain pipe are laid successfully, the electrode structure is electrified and detected;
continuously laying soil bodies in layers according to roadbed parameters, and arranging a roadbed drainage system between adjacent layers until the soil bodies reach the upper surface of the roadbed;
after the pair of positive electrode structure and negative electrode structure is mounted, the energization detection is performed immediately.
10. The construction method according to claim 9, wherein the carbon fiber rod is provided coaxially with the hollow tube, and a plurality of carbon fiber rods corresponding to the same absorption film are arranged in the hollow tube in the road extending direction.
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