CN114411540A - Transverse buried drainage ditch at rigid-flexible joint of road surface and construction method - Google Patents
Transverse buried drainage ditch at rigid-flexible joint of road surface and construction method Download PDFInfo
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- CN114411540A CN114411540A CN202111564447.8A CN202111564447A CN114411540A CN 114411540 A CN114411540 A CN 114411540A CN 202111564447 A CN202111564447 A CN 202111564447A CN 114411540 A CN114411540 A CN 114411540A
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- 239000002985 plastic film Substances 0.000 claims abstract description 62
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- 238000000465 moulding Methods 0.000 claims description 2
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/34—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ made of several courses which are not bound to each other ; Separating means therefor, e.g. sliding layers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/067—Flat continuous joints cast in situ
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/086—Drainage arrangements or devices
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
- E03F3/046—Open sewage channels
Abstract
The invention discloses a transverse buried drainage ditch at a rigid-flexible joint of a road surface and a construction method, wherein the method comprises the following steps: the method comprises the following steps of paving asphalt concrete at the expansion joint of the bridge, excavating an asphalt layer at the installation position of the expansion joint by reverse grooving, constructing a transverse drainage ditch at the bottom of the expansion joint, constructing a waterproof layer at the drainage ditch, installing a transverse concealed gap type drainage material, installing an expansion joint steel structure, constructing steel fiber cement concrete, and cutting off redundant plastic films. The invention solves the problem that water between the layers of the asphalt pavement at the rigid-flexible joint of the pavement longitudinally flows to the steel joint of the bridge or the cement concrete pavement from high to low and overflows when accumulated water overflows, prevents the damage and early diseases of the pavement at the rigid-flexible joint of the pavement, effectively reduces the operation and maintenance cost greatly, and provides a safe and reliable highway product.
Description
Technical Field
The invention relates to the technical field of highway construction, in particular to a transverse buried drainage ditch at a rigid-flexible joint of a road surface and a construction method.
Background
The bridge expansion joint steel seam, the steel fiber cement concrete composite steel seam and the front and back asphalt concrete, or the transverse joint of the asphalt concrete semi-rigid pavement and the cement concrete rigid pavement has a contact section of rigid-flexible combination of the pavement, due to the layered paving of the asphalt concrete and the existence of the void ratio, rainwater permeates to a waterproof semi-rigid base layer or an integral cast-in-place layer of the asphalt concrete composite bridge floor cement concrete layer from the asphalt surface and the periphery layer by layer to form interlayer water of a pavement structure layer, the interlayer water flows from high to low to the rigid-flexible transverse joint along a longitudinal slope of the pavement, due to the fact that the bridge steel seam and the cement concrete are not permeable in the whole transverse structure layer of the pavement, the height of the bridge steel seam and the height of the cement concrete are flush with the top surface of the asphalt pavement, the interlayer water of the asphalt pavement structure flows from high to low to the rigid-flexible joint and is blocked by the steel seam or the cement concrete, the bridge steel seam and the cement concrete overflow and the transverse flow along the joint of two different materials at the rigid-flexible joint, the asphalt concrete at the joint part is saturated with water and is wet and floods on the surface of the asphalt concrete, steel seams or the surfaces of the steel fiber cement concrete and the cement concrete are soaked by water overflowing from the asphalt concrete layers, under the condition that the automobile runs at high speed, high-pressure water is formed to destroy the asphalt pavement and the steel seams, early damage and diseases of the steel seams and the asphalt pavement are formed, the automobile suddenly runs on the floody pavement, the friction and running conditions of wheels of the automobile are changed, and great potential safety hazards are generated.
Disclosure of Invention
In order to solve the problems, the invention provides a transverse buried drainage ditch at a rigid-flexible joint of a pavement and a construction method, and particularly provides a construction method for solving the problem that longitudinal seepage water between asphalt concrete layers at the rigid-flexible joint of the pavement overflows at the rigid-flexible joint, so that a good highway product is provided for the public, and the whole life cycle time of the highway is also prolonged.
The invention aims to overcome the defects of the prior art, can effectively solve the problem that water between layers of the asphalt pavement at the rigid-flexible joint of the pavement longitudinally flows to a bridge steel seam or a cement concrete pavement from high to low, prevents the damage and early disease of the pavement at the rigid-flexible joint of the pavement, effectively reduces the operation and maintenance cost greatly, and provides a safe and reliable highway product.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a construction method for a transverse drainage ditch buried in a rigid-flexible joint of a pavement comprises the following steps:
paving asphalt concrete at the bridge expansion joint;
step (2) reversely grooving and excavating the expansion joint, and paving an asphalt layer at the installation position;
after construction of each structural layer of the asphalt is finished, lofting and popping out an excavation line according to the installation plane position of the expansion joint, cutting according to the excavation line, excavating asphalt concrete paved at the position of the expansion joint, removing floating slag and floating slurry, correcting the expansion joint, and installing embedded connecting steel bars;
and (3) constructing a transverse drainage ditch at the bottom of the expansion joint:
digging a transverse drainage ditch in the full-section width range at the edge bottom of one side of the telescopic slot close to the uphill side of the route, and keeping the longitudinal slope of the drainage ditch consistent with the transverse slope of the road surface;
step (4), constructing a waterproof layer of the drainage ditch:
washing and cleaning the inside of the telescopic joint groove and the pit wall, dredging all layers of asphalt concrete and the surface of asphalt mixture, preventing cutting slurry from being filled, and coating a waterproof layer on cement concrete on the surface of the drainage ditch;
and (5) transversely and secretly burying gap type drainage materials:
laying a plastic film layer at the bottom of the drainage groove, laying an anti-seepage geomembrane on the plastic film layer, laying a water seepage geotextile on the anti-seepage geomembrane, mounting drainage ropes on the water seepage geotextile in the drainage groove, sleeving PVC pipes on parts of the drainage ropes at each side, which extend out of the road surface, wherein one part of the PVC pipes extends into the transverse buried drainage groove, and the other part of the PVC pipes is outside the road surface, so that the drained water is ensured not to drip on the cement concrete structure at the lower part of the expansion joint; folding and molding a gap type drainage material consisting of a plastic film layer, an anti-seepage geomembrane, a water seepage geotextile and a drainage rope which are laid in sequence in the drainage ditch according to the size of the drainage ditch, so that the plastic film layer, the anti-seepage geomembrane and the water seepage geotextile are tightly attached to the asphalt concrete wall of the expansion joint ditch, pressing the extended plastic film on the asphalt pavement by using steel bars, and fixing the gap type drainage material; spraying and filling epoxy resin on a gap between the groove top and the plastic film at one side of the transverse drainage ditch at the bottom of the expansion joint, which is close to the expansion joint of the bridge;
step (6), installing an expansion joint steel structure;
step (7), steel fiber cement concrete construction;
and (8) cutting off the redundant plastic film.
Further, in the step (1), the semi-rigid base layer and the cement concrete bridge deck at the front and the back of the bridge expansion joint are integrally paved, the cement concrete bridge deck is integrally paved, the flatness is 6 m, the pit concavity of the ruler is not more than 5mm, and the waterproof bonding layer is constructed after the cement concrete bridge deck is finely milled and planed to remove floating slurry on the integrally paved surface of the cement concrete bridge deck; and (3) performing asphalt permeable layer oil, slurry seal or modified asphalt seal construction on the semi-rigid base layer. And after the transverse gap of the expansion joint is sealed by the battens, longitudinally and continuously constructing according to the structure layers of the asphalt layer to finish the asphalt concrete pavement, wherein the flatness of the expansion joint is not more than 4mm by using a 6-meter ruler.
And (3) further, in the step (2), cutting according to an excavation line by using a cutting machine, removing the asphalt concrete paved at the position of the expansion joint by manual excavation, removing floating slurry and floating slag at the installation position of the expansion joint of the abutment breast wall top and the beam slab integrated cast-in-place layer, and correcting the expansion joint and installing the embedded connecting steel bars.
Furthermore, in the step (4), the section of the asphalt concrete on one side close to the lateral drainage ditch in the telescopic slot is washed and cleaned, all layers of the asphalt concrete and the surface of the asphalt mixture are combed to prevent the cutting powder slurry from being filled, so that water among the asphalt concrete layers is discharged, and a waterproof layer is coated on the cement concrete on the surface of the lateral buried drainage ditch.
Further, in the step (5),
5.1 laying a plastic film layer:
and a plastic film layer is laid at the bottom of the drainage groove, the length of the plastic film layer is the total length of the expansion joint, and the width of the plastic film layer is 2H +2B + A + 10-20 cm.
5.2 laying an impermeable geomembrane:
and laying an impermeable geomembrane on the plastic film layer, wherein the length is the full length of the expansion joint, and the width is 2H +2B + A-3 cm.
5.3 laying water-permeable geotextile:
and laying a layer of water-permeable geotextile on the impermeable geomembrane, wherein the length is the total length of the expansion joint, and the width is 2H +2B + A-3 cm.
5.4 installing a drainage rope:
in the drainage ditch, a drainage rope is installed on the water seepage geotextile, the length of the drainage rope is +2 multiplied by 15-30 cm of the total length of the expansion joint, each side of the drainage rope stretches out of 15-30 cm, a PVC pipe is sleeved on the stretching part of each side of the drainage rope, the length of the pipe is 25-40 cm, 10cm of the pipe stretches into the expansion joint and is transversely buried in the drainage ditch in a concealed mode, 15-30 cm of the pipe is arranged outside the pavement, and the drainage rope ensures that the drained water does not drip on a cement concrete structure at the lower part of the expansion joint and influences the service life of the bridge cement concrete.
Further, in the step (6), installing the expansion joint steel structure members according to requirements, so that the connecting pieces of the steel structure members and the embedded pieces are effectively and stably connected, and the top surface of the expansion joint steel structure is reduced by 1-2mm compared with the top surface of the asphalt.
Further, in the step (7), before the steel fiber cement concrete construction, cleaning the telescopic slot, wetting the cement concrete in the slot for multiple times in advance for 24 hours, not accumulating water in the slot during the steel fiber cement concrete construction, mixing the steel fiber cement concrete according to the mixing ratio, paving the steel fiber cement concrete in the slot, paying attention to the combination with the slot type drainage material, avoiding disturbance of the slot type drainage material during extensive construction, and maintaining for at least 14 days after serious vibration and surface polishing.
Further, in the step (8), after the construction of the steel fiber cement concrete, namely the transverse buried gap type drainage ditch, is finished, the asphalt concrete surface layer is leveled, the redundant plastic film is cut off by a tool, and the rigid and flexible joint of the cut-off plastic film is shortened by a blowtorch, so that the exposed plastic film is shrunk, and the function of the pavement is kept.
The invention also relates to a transverse buried drainage ditch at the rigid-flexible joint of the road surface, wherein at the joint part of a road expansion joint or a cement concrete road surface and an asphalt concrete road surface, along the direction of asphalt concrete descending slope of a longitudinal slope, at the joint part of the asphalt concrete, the cement concrete and a bridge expansion joint, the asphalt concrete flows along the longitudinal layers at the bottom of the water, and the buried gap type drainage ditch is transversely increased;
the transverse hidden-buried gap type drainage ditch comprises a plastic film layer, the plastic film layer is arranged at the bottom of the drainage ditch, an anti-seepage geomembrane is paved on the plastic film layer, a water seepage geotextile is paved on the anti-seepage geomembrane, and a drainage rope is installed on the water seepage geotextile in the drainage ditch; the plastic film layer, the seepage-proof geomembrane, the seepage geotextile and the drainage ropes form a gap type drainage material, the gap type drainage material is folded and formed according to the size of the drainage ditch, the plastic film layer, the seepage-proof geomembrane and the seepage geotextile are tightly attached to the asphalt concrete wall of the expansion joint groove, and the extended plastic film is pressed on the asphalt pavement by steel bars.
And (3) constructing a transverse buried drainage ditch at the bottom of the groove, and forming a transverse drainage function.
And (4) constructing a water-proof construction for the transverse drainage ditch at the bottom of the ditch, and ensuring that the lower part structure of the drainage ditch is not eroded by water.
And (5) transversely and secretly embedding the gap type drainage material for installation, namely forming a gap type drainage structure and ensuring that water and seepage water between the asphalt concrete layers are drained to the transverse drainage ditch through the gap type drainage material for drainage.
And (8) cutting off redundant plastic films to ensure the continuity of the pavement and ensure the permeation and drainage of water on the surface of the pavement.
Compared with the prior art, the invention has the following advantages:
the invention has the advantages that the hidden gap type drainage ditch is transversely added at the joint part of the road expansion joint or the cement concrete pavement and the asphalt concrete pavement along the direction of the asphalt concrete downslope of the longitudinal slope and at the joint part of the asphalt concrete, the cement concrete and the bridge expansion joint, the bottom of the flowing water of the asphalt concrete along the longitudinal layers is provided, the flowing water of the asphalt concrete between the layers on the pavement at the rigid-flexible combination position can be effectively discharged, the rigid-flexible combination part of the pavement can be effectively dried, the project quality can be improved, the service life of the project can be prolonged, the safe operation can be provided, the maintenance cost can be saved, and the early water damage of the pavement can be avoided.
The invention is not applied to the joint between the road asphalt concrete pavement which is rainy and humid or has surface water and the bridge deck expansion joint, the disease generally occurs in about two years, and the service life is more than 10 years by applying the technology of the invention.
The invention is suitable for discharging water between the expansion joint of the highway and the municipal road and the bridge and between the airport pavement and the transverse asphalt concrete longitudinal interlayer at the joint of the road asphalt concrete and the cement concrete, is suitable for projects such as new construction, reconstruction and extension, major and middle repair, expansion joint flashing and effluent disease treatment, and has good social and economic benefits after popularization.
Drawings
FIG. 1 is a view showing a structure of a bridge deck expansion joint and a transverse buried gap type drainage structure of an asphalt pavement;
FIG. 2 is a structure diagram of a lateral buried gap type drainage structure of a cement concrete pavement and an asphalt pavement.
In the figure: 1-asphalt concrete upper surface layer, 2-asphalt concrete middle surface layer, 3-asphalt concrete lower surface layer, 4-cement stabilized macadam base layer, 5-graded macadam cushion layer, 6-drainage material and 7-drainage rope.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 and 2, in the horizontal buried drainage ditch at the rigid-flexible joint of the road surface of this embodiment, at the joint of the road expansion joint or the cement concrete road surface and the asphalt concrete road surface, along the asphalt concrete downhill direction of the longitudinal slope, at the joint of the asphalt concrete, the cement concrete and the bridge expansion joint, there is asphalt concrete along the bottom of the water flowing between the longitudinal layers, and buried gap type drainage ditches are added horizontally;
the transverse hidden-buried gap type drainage ditch comprises a plastic film layer, the plastic film layer is arranged at the bottom of the drainage ditch, an anti-seepage geomembrane is paved on the plastic film layer, a water seepage geotextile is paved on the anti-seepage geomembrane, and a drainage rope is installed on the water seepage geotextile in the drainage ditch; the plastic film layer, the seepage-proof geomembrane, the seepage geotextile and the drainage ropes form a gap type drainage material, the gap type drainage material is folded and formed according to the size of the drainage ditch, the plastic film layer, the seepage-proof geomembrane and the seepage geotextile are tightly attached to the asphalt concrete wall of the expansion joint groove, and the extended plastic film is pressed on the asphalt pavement by steel bars.
In the embodiment, the plastic film is a nylon film with good tensile strength, high tensile strength, heat resistance, cold resistance, oil resistance, organic solvent resistance, wear resistance and puncture resistance, and the thickness of the nylon film is 0.02-0.05mm, and the nylon film has the effect of preventing the cement slurry of the cement concrete from coagulating the geotextile to damage the permeation drainage performance. The anti-seepage geomembrane has the functions of protecting the geotextile and simultaneously realizing the infiltration and drainage of the side water of the steel fiber cement concrete, and the polypropylene geomembrane M0.3-M0.4 can be used.
The water-permeable geotextile has the function of guiding and draining the interlayer of the asphalt concrete structure and the water permeation, and the filament spun-bonded needle-punched non-woven geotextile can be used, and the thickness is 0.5-1.0 mm.
The drainage rope is used for filling the lateral drainage ditch and forming the lateral drainage of the permeation water between the structural layers of the asphalt pavement, and plastic or asbestos ropes with the diameter of 0.5-1.0mm can be used.
The construction method of the transverse hidden-buried gap type drainage ditch at the rigid-flexible joint of the pavement comprises the following steps:
step 1: paving asphalt concrete at the bridge expansion joint:
the semi-rigid base layer and the cement concrete bridge deck at the front and the back of the bridge expansion joint are integrally paved, the cement concrete bridge deck is integrally paved, the pit with the flatness of 6 m and the straight scale pit concavity are not more than 5mm, and a waterproof bonding layer is constructed after the cement concrete bridge deck is finely milled and planed to remove floating slurry on the integrally paved surface of the cement concrete bridge deck; and (3) performing asphalt permeable layer oil, slurry seal or modified asphalt seal construction on the semi-rigid base layer. And after the transverse gap of the expansion joint is sealed by the battens, longitudinally and continuously constructing according to the structure layers of the asphalt layer to finish the asphalt concrete pavement, wherein the flatness of the expansion joint is not more than 4mm by using a 6-meter ruler.
Step 2: and (3) excavating an expansion joint installation position asphalt layer by reverse grooving:
after construction of each structural layer of the asphalt is finished, lofting and popping out an excavation line according to the position of an installation plane of the expansion joint, cutting according to the excavation line by using a cutting machine, removing the asphalt concrete paved at the position of the expansion joint by manual excavation, removing laitance and floatage at the installation position of the expansion joint of the abutment breast wall top and the beam slab integrated cast-in-place layer, and correcting the expansion joint and installing embedded connecting steel bars.
And step 3: construction of a transverse drainage ditch at the bottom of the expansion joint groove:
and (3) digging a transverse drainage ditch with the width of B and the depth of H in the full-section breadth range by the aid of a hand-held cutting machine in the edge bottom of the side, close to the uphill side of the route, of the telescopic seam groove, keeping the longitudinal slope of the drainage ditch consistent with the transverse slope of the road surface, and enabling the bottom of the drainage ditch to be smooth so as to facilitate smooth drainage.
And 4, step 4: drainage ditch construction waterproof layer:
the water is used for washing and cleaning the inside of the telescopic slot and the pit wall, particularly the section of the asphalt concrete on one side close to the transverse drainage ditch, and the asphalt concrete is carefully scrubbed and combed through among layers of the asphalt concrete and the surface of the asphalt mixture to prevent the cutting powder slurry from being filled so as to facilitate the drainage of water among asphalt concrete layers. In order to ensure that the transverse drainage ditch is not seeped, a waterproof layer is coated on cement concrete on the surface of the drainage ditch, and the quality inspection is carried out.
And 5: installing transverse hidden-buried gap type drainage materials:
(5.1) laying a plastic film layer:
and a plastic film layer is laid at the bottom of the drainage groove, the length of the plastic film layer is the total length of the expansion joint, and the width of the plastic film layer is 2H +2B + A +10 cm.
(5.2) laying an impermeable geomembrane:
and laying an impermeable geomembrane on the plastic film layer, wherein the length is the full length of the expansion joint, and the width is 2H +2B + A-3 cm.
(5.3) paving water-permeable geotextile:
and laying a layer of water seepage geomembrane on the anti-seepage geomembrane, wherein the length is the total length of the expansion joint, and the width is 2H +2B + A-3 cm.
(5.4) installing an asbestos drainage rope:
in the drainage ditch, asbestos drainage ropes are installed on the water-permeable geotextile, the length of each asbestos drainage rope is +2 multiplied by 15cm (each side extends out of 15 cm), a PVC pipe is sleeved on the extending part of each drainage rope, the length of each PVC pipe is 25cm, 10cm extends into the expansion joint, and 15cm is outside the pavement, so that the discharged water is ensured not to drip on cement concrete at the lower part of the expansion joint, and the service life of the bridge cement concrete is influenced.
(5.5) forming the gap type drainage material:
folding and forming a gap type drainage material consisting of a plastic film layer, an anti-seepage geomembrane, a water seepage geotextile and an asbestos drainage rope which are sequentially paved at the drainage ditch according to the size of the drainage ditch, so that the plastic film layer, the anti-seepage geomembrane and the water seepage geotextile are tightly attached to the asphalt concrete wall of the expansion joint ditch, pressing the extended 10cm plastic film on the asphalt pavement by using steel bars, and fixing the gap type drainage material.
(5.6) at the side of the lateral drainage ditch at the bottom of the expansion joint close to the expansion joint of the bridge, epoxy resin is used for spraying and filling the gap between the groove top and the plastic film, so that the drainage ditch is prevented from being blocked by the lateral drainage ditch when cement paste overflows during cement concrete construction.
Step 6: installation expansion joint steel construction
The expansion joint steel structure member is installed as required, the connecting piece of the steel member is effectively and stably connected with the embedded part, and the top surface of the expansion joint steel structure is reduced by 1-2mm compared with the top surface of the asphalt.
And 7: steel fiber cement concrete construction:
before the steel fiber cement concrete construction, the telescopic slot is cleaned, the cement concrete in the slot is wetted for multiple times in advance for 24 hours, no water is accumulated in the slot during the steel fiber cement concrete construction, the steel fiber cement concrete is mixed according to the mixing proportion, the steel fiber cement concrete enters the slot and is laid, the steel fiber cement concrete is combined with the slot type drainage material, the slot type drainage material is prevented from being disturbed by extensive construction, and the steel fiber cement concrete is subjected to serious vibration and surface polishing and then is maintained for at least 14 days.
And 8: cutting off redundant plastic films:
after the steel fiber cement concrete, namely the transverse buried gap type drainage ditch, is constructed, the asphalt concrete surface layer is leveled, and after the redundant plastic film is cut off by using scissors, the rigid and flexible joint of the cut-off plastic film is shortened by using a blowtorch, so that the exposed plastic film is shrunk, and the function of the pavement is kept.
In the technological parameters, the width B of the transverse drainage ditch is generally 1-1.5 cm, the depth H is 1.3-1.8 cm, and A is the thickness of steel fiber cement concrete or pavement cement concrete, and is determined by calculation according to traffic volume parameters. The width of the laid gap type geotextile or geomembrane is 3cm less than that of 2H +2B + A-3cm, which is determined according to the thickness of the upper layer of the asphalt concrete, which is generally 4cm, so that the effective discharge of water between the upper layers is ensured.
In this embodiment, the drainage rope is a durable asbestos rope with a gap, a plastic rope or a rope made of water-permeable geotextile, or a central drainage pipe.
In this embodiment, when the rigid-flexible joint between the road cement concrete pavement and the asphalt concrete pavement is formed, the transverse buried gap type drainage ditch is arranged at the joint only when the asphalt concrete pavement is connected with the cement concrete pavement along the downhill direction.
In this embodiment, when the longitudinal slope of the road surface is close to a flat slope, the rigid-flexible joints should be provided with transverse buried gap type drainage ditches.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A construction method for transversely and secretly burying a drainage ditch at a rigid-flexible joint of a pavement is characterized by comprising the following steps: the method comprises the following steps:
paving asphalt concrete at the bridge expansion joint;
step (2) reversely grooving and excavating the expansion joint, and paving an asphalt layer at the installation position;
after construction of each structural layer of the asphalt is completed, lofting and popping out an excavation line according to the installation plane position of the expansion joint, cutting according to the excavation line, vertically and orderly excavating asphalt concrete paved at the position of the expansion joint, removing floating slag and floating slurry, correcting the expansion joint, and installing pre-buried connecting reinforcing steel bars;
and (3) constructing a transverse drainage ditch at the bottom of the expansion joint:
digging a transverse drainage ditch in the full-section width range at the edge bottom of one side of the telescopic slot close to the uphill side of the route, and keeping the longitudinal slope of the drainage ditch consistent with the transverse slope of the road surface;
step (4), constructing a waterproof layer of the drainage ditch:
washing and cleaning the inside of the telescopic joint groove and the pit wall, dredging all layers of asphalt concrete and the surface of asphalt mixture, preventing cutting slurry from being filled, and coating a waterproof layer on cement concrete on the surface of the drainage ditch;
and (5) transversely and secretly burying gap type drainage materials:
laying a plastic film layer at the bottom of the drainage groove, laying an anti-seepage geomembrane on the plastic film layer, laying a water seepage geotextile on the anti-seepage geomembrane, mounting drainage ropes on the water seepage geotextile in the drainage groove, sleeving PVC pipes on parts of the drainage ropes at each side, which extend out of the road surface, wherein one part of the PVC pipes extends into the transverse buried drainage groove, and the other part of the PVC pipes is outside the road surface, so that the drained water is ensured not to drip on the cement concrete structure at the lower part of the expansion joint; folding and molding a gap type drainage material consisting of a plastic film layer, an anti-seepage geomembrane, a water seepage geotextile and a drainage rope which are laid in sequence in the drainage ditch according to the size of the drainage ditch, so that the plastic film layer, the anti-seepage geomembrane and the water seepage geotextile are tightly attached to the asphalt concrete wall of the expansion joint ditch, pressing the extended plastic film on the asphalt pavement by using steel bars, and fixing the gap type drainage material; spraying and filling epoxy resin on a gap between the groove top and the plastic film at one side of the transverse drainage ditch at the bottom of the expansion joint, which is close to the expansion joint of the bridge;
step (6), installing an expansion joint steel structure;
step (7), steel fiber cement concrete construction;
and (8) cutting off the redundant plastic film.
2. The method of claim 1, wherein: in the step (1), the semi-rigid base layer and the cement concrete bridge deck at the front and the back of the bridge expansion joint are integrally paved, the cement concrete bridge deck is integrally paved, the pit concavity with the flatness of 6 m and the straight scale is not more than 5mm, and a waterproof bonding layer is constructed after the cement concrete bridge deck is finely milled and planed to remove floating slurry on the integrally paved surface of the cement concrete bridge deck; and (3) performing asphalt permeable layer oil, slurry seal or modified asphalt seal construction on the semi-rigid base layer. And after the transverse gap of the expansion joint is sealed by the battens, longitudinally and continuously constructing according to the structure layers of the asphalt layer to finish the asphalt concrete pavement, wherein the flatness of the expansion joint is not more than 4mm by using a 6-meter ruler.
3. The method of claim 1, wherein: and (2) cutting according to an excavation line by using a cutting machine, removing the asphalt concrete paved at the position of the expansion joint by manual excavation, removing floating slurry and floating slag at the installation position of the expansion joint of the abutment breast wall top and the beam slab integrated cast-in-situ layer, and correcting the expansion joint and installing the embedded connecting steel bars.
4. The method of claim 1, wherein: and (4) flushing and cleaning the asphalt concrete section on one side close to the transverse drainage ditch in the telescopic slot, combing the asphalt concrete layers and the surface of the asphalt mixture to prevent the cutting slurry from being filled, so that the water among the asphalt concrete layers can be discharged conveniently, and coating a waterproof layer on the cement concrete on the surface of the transverse buried drainage ditch.
5. The method of claim 1, wherein: in the step (5), the step (c),
5.1 laying a plastic film layer:
a plastic film layer is laid at the bottom of the drainage groove, the length is the full length of the expansion joint, and the width is
5.2 laying an impermeable geomembrane:
laying an anti-seepage geomembrane on the plastic film layer, wherein the length is the total length of the expansion joint, and the width is 2H +2B + A-3 cm;
5.3 laying water-permeable geotextile:
laying a layer of water seepage geotextile on the anti-seepage geomembrane, wherein the length is the total length of the expansion joint, and the width is 2H +2B + A-3 cm;
5.4 installing a drainage rope:
in the drainage ditch, a drainage rope is arranged on the water-permeable geotextile, and the length of the drainage rope is the total length of the expansion joint
Each side extending out
The extension part of each side of the drainage rope is sleeved with a PVC pipe with the length
Wherein 10cm of the expansion joint extends into the transverse buried drainage ditch of the expansion joint,
outside the road surface, the discharged water is ensured not to drip on the cement concrete structure at the lower part of the expansion joint, and the service life of the bridge cement concrete is influenced.
6. The method of claim 1, wherein: in the step (6), the expansion joint steel structure members are installed according to requirements, so that the connecting pieces of the steel structure members are effectively and stably connected with the embedded pieces, and the top surface of the expansion joint steel structure is reduced by 1-2mm compared with the top surface of the asphalt.
7. The method of claim 1, wherein: in the step (7), before the steel fiber cement concrete construction, cleaning the telescopic slot, wetting the cement concrete in the slot for multiple times in advance for 24 hours, wherein no water is accumulated in the slot during the steel fiber cement concrete construction, mixing the steel fiber cement concrete according to the mixing ratio, paving the steel fiber cement concrete in the slot, paying attention to the combination with the slot type drainage material, avoiding disturbance of the slot type drainage material during extensive construction, and maintaining for at least 14 days after serious vibration and surface polishing.
8. The method of claim 1, wherein: in the step (8), the steel fiber cement concrete, namely the transverse buried seam type drainage ditch, is constructed, the asphalt concrete surface layer is leveled, after the redundant plastic film is cut off by a tool, the rigid and flexible joint of the cut-off plastic film is shortened by a blowtorch, so that the exposed plastic film is shrunk, and the function of the pavement is kept.
9. The utility model provides a drainage ditch is transversely buried secretly in firm gentle combination department of road surface which characterized in that: at the joint part of the road expansion joint or the cement concrete pavement and the asphalt concrete pavement, along the asphalt concrete downslope direction of the longitudinal slope, at the joint part of the asphalt concrete, the cement concrete and the bridge expansion joint, the bottom of the asphalt concrete flowing along the longitudinal layers is transversely provided with a hidden gap type drainage ditch;
the transverse hidden-buried gap type drainage ditch comprises a plastic film layer, the plastic film layer is arranged at the bottom of the drainage ditch, an anti-seepage geomembrane is paved on the plastic film layer, a water seepage geotextile is paved on the anti-seepage geomembrane, and a drainage rope is installed on the water seepage geotextile in the drainage ditch; the plastic film layer, the seepage-proof geomembrane, the seepage geotextile and the drainage ropes form a gap type drainage material, the gap type drainage material is folded and formed according to the size of the drainage ditch, the plastic film layer, the seepage-proof geomembrane and the seepage geotextile are tightly attached to the asphalt concrete wall of the expansion joint groove, and the extended plastic film is pressed on the asphalt pavement by steel bars.
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