CN106498848B - A kind of room temperature filling type bridge gapless expansion joint and its construction method - Google Patents
A kind of room temperature filling type bridge gapless expansion joint and its construction method Download PDFInfo
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- CN106498848B CN106498848B CN201611086092.5A CN201611086092A CN106498848B CN 106498848 B CN106498848 B CN 106498848B CN 201611086092 A CN201611086092 A CN 201611086092A CN 106498848 B CN106498848 B CN 106498848B
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- filling type
- metalling
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- 238000010276 construction Methods 0.000 title claims abstract description 20
- 239000004814 polyurethane Substances 0.000 claims abstract description 35
- 229920002635 polyurethane Polymers 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 21
- 230000010412 perfusion Effects 0.000 claims abstract description 17
- 230000013011 mating Effects 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 43
- 239000010410 layer Substances 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 28
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 238000005488 sandblasting Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 150000005846 sugar alcohols Polymers 0.000 claims description 6
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 6
- 239000004970 Chain extender Substances 0.000 claims description 5
- 150000004678 hydrides Chemical class 0.000 claims description 5
- 239000005056 polyisocyanate Substances 0.000 claims description 5
- 229920001228 polyisocyanate Polymers 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
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- 230000008569 process Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000010959 steel Substances 0.000 description 16
- 239000010408 film Substances 0.000 description 13
- 238000005422 blasting Methods 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000003822 epoxy resin Substances 0.000 description 1
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Classifications
-
- 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Floor Finish (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of room temperature filling type bridge gapless expansion joint and its construction methods, including the notch between adjacent beams above gap and set on the transverse joint plate of pocket bottom；Flexible filler is filled up in gap between the adjacent beams；Dual-component polyurethane perfusion metalling, film layer are successively arranged under upper in the notch, film layer is set to the upper surface of transverse joint plate；The notch is equipped with multiple locating pins in the interface being in contact of mating formation with original.The present invention, which has thoroughly broken traditional gapless expansion joint, needs scene heating and the process flow of mix, realize the room temperature perfusion rubble formula construction technology at gapless expansion joint, cementitious matter and building stones are heated without dedicated heating, melting unit, construction technology is simple, low in cost.
Description
Technical field
The present invention relates to a kind of room temperature filling type bridge gapless expansion joint and its construction methods.
Background technique
Bridge expanssion joint, which refers to, to be arranged between bridge beam end, is used between beam-ends and abutment or at bridge articulated position
Coordinate the bridge floor as caused by temperature and humidity variation, concrete shrinkage and creep, the sedimentation of bridge upsetting platform and beam-ends rotation etc. to become
The device of shape.Under the coupling of driving dynamic loading and dilatation stress, the bridge expanssion joint that is directly exposed in atmosphere
Weak link as bridge.The quality of bridge expanssion joint directly determines road-ability and safety, thus into one
Step influences the service life of whole bridge.
Structure is complicated with filling dock, build-in dock, rubber slat, steel supporting type and modulus type etc., cost compared with
High bridge expanssion joint is compared, and gapless expansion joint is easy for construction, for ease of maintenaince maintenance, waterproof performance is excellent, comfort level of driving a vehicle
Height, and cost is relatively low, thus is at home and abroad widely applied in medium and small span or stroke≤40mm bridge.
Traditional gapless expansion joint uses pitch, modified pitch or lastics (TST) for cementitious matter, and there are high-temperature stabilities
The performance shortcomings such as insufficient and low-temperature cracking-resistance is not good enough, and dedicated heating, melting unit is needed to heat cementitious matter and building stones
Processing, construction technology are complex.In addition, traditional gapless expansion joint low-temperature extension amount is smaller, this is largely limited
Its application on big stroke bridge.
Summary of the invention
It is existing high for the bridge gapless expansion joint of cementitious matter with pitch, modified pitch or thermoplastic body (TST) in order to overcome
Temperature stability is insufficient, low-temperature cracking-resistance is not good enough, low-temperature extension amount is smaller and installation, the defects of construction technology is cumbersome, the present invention
A kind of room temperature filling type bridge gapless expansion joint proposed and its construction method simplify the installation of bridge expanssion joint, from
And be more suitable for using.
It realizes above-mentioned technical purpose, reaches above-mentioned technical effect, the invention is realized by the following technical scheme:
A kind of room temperature filling type bridge gapless expansion joint, including gap, the gap top between adjacent beams between adjacent beams
Notch and transverse joint plate set on pocket bottom；Flexible filler is filled up in gap between the adjacent beams；In the notch from it is upper it
Under be successively arranged dual-component polyurethane perfusion metalling, film layer, dual-component polyurethane be perfused metalling include metalling, rubble
Layer surface is perfused with two-component polyurethane adhesive ramming material；Film layer is set to the upper surface of transverse joint plate；The notch is mated formation phase with original
The interface of contact is equipped with multiple locating pins.
Further, the two-component polyurethane adhesive ramming material is made of host agent and curing agent, wherein host agent be polyalcohol and
The end NCO performed polymer that polyisocyanates reacts, wherein the mass fraction of-NCO group is 5% ~ 10%；Curing agent is mainly by living
Property hydride, chain extender and filler composition, weight ratio are as follows: 100:5 ~ 15:50 ~ 100；It is additionally added in curing agent and accounts for curing agent
The catalyst of weight 0.5% ~ 1.0% and the ultraviolet absorber of curing agent weight 0.1% ~ 1.0%.
Further, the metalling includes at least two layers of metalling with single particle size rubble；The single particle size
Rubble is one of 3 ~ 5mm, 5 ~ 10mm, 10 ~ 15mm and 15 ~ 20mm.
Further, it is fixedly connected between the flexible filler and transverse joint plate by locating pin.
Further, the width of the transverse joint plate is the 60% ~ 70% of width of rebate；The locating pin staggeredly be set to notch with
Original mat formation the interfacial level being in contact 1/3 ~ 3/4 at.
Further, the notch mats formation the interface being in contact with original equipped with adhesive layer.
A kind of construction method at room temperature filling type bridge gapless expansion joint, comprising the following steps:
Step 1: notch is formed above gap between adjacent beams；
Step 2: the interface being in contact with notch of mating formation to original carries out sandblasting punishment, forms sandblasting and punish interface；
Step 3: the filling flexible filler in adjacent beam body gap, pocket bottom seating surface paste film across seam
Plate；
Step 4: layering dispenses single particle size rubble, then it is tamped, forms metalling；
Step 5: then being smoothed out in the rubble layer surface perfusion two-component polyurethane adhesive ramming material tamped, forms room temperature and fill
Note formula bridge gapless expansion joint.
Further, the step 2 is further comprising the steps of: brushing binder in sandblasting punishment interface, brushes thickness
For 1 ~ 2mm, dosage is 1 ~ 1.2kg/m2。
Further, between the step 3 and step 4 further include: at sandblasting punishment interface away from pocket bottom 1/3 ~ 3/4
Locate interlaced arrangement locating pin；Transverse joint plate is fixedly connected with flexible filler using locating pin.
Further, the two-component polyurethane adhesive ramming material layer is made of host agent and curing agent, and wherein host agent is polyalcohol
The end NCO performed polymer reacted with polyisocyanates, wherein the mass fraction of-NCO group is 5% ~ 10%；Curing agent mainly by
Active hydride, chain extender and filler composition, weight ratio are as follows: 100:5 ~ 15:50 ~ 100；It is additionally added in curing agent and accounts for solidification
The catalyst of agent weight 0.5% ~ 1.0% and the ultraviolet absorber of curing agent weight 0.1% ~ 1.0%.
Beneficial effects of the present invention:
(1) present invention is directly perfused using upper flow regime dual-component polyurethane as gapless expansion joint cementitious matter using room temperature
Technique, and by expansion joint and the former processing of interface and expansion joint and slot bottom across seam surface of steel plate of mating formation, to found
A kind of room temperature filling type bridge gapless expansion joint, makes it have more practicability.
(2) present invention effectively overcomes traditional nothing by upper flow regime, normal temperature cure, the selection of two-component polyurethane adhesive ramming material
The performance shortcomings such as seam expanded joint material high-temperature stability is insufficient, low-temperature cracking-resistance is not good enough and low-temperature extension amount is smaller, can be wide
It is general to be applied to the highway bridge with big stroke.
(3) present invention, which has thoroughly broken traditional gapless expansion joint, needs scene heating and the process flow of mix, realizes
Rubble formula construction technology is perfused in the room temperature at gapless expansion joint, carries out without dedicated heating, melting unit to cementitious matter and building stones
Heat treatment, construction technology are simple, low in cost.
Detailed description of the invention
Fig. 1 is the structure sectional view of an embodiment of the present invention；
In figure: 1- original is mated formation；Metalling is perfused in 2- dual-component polyurethane；3- beam；4- transverse joint plate；5- locating pin；6- is flexible
Filler；7- film layer；8- locating pin.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
A kind of room temperature filling type bridge gapless expansion joint, including 3 gaps of adjacent beams, be located at 3 gaps of adjacent beams on
Square notch and the transverse joint plate 4 set on pocket bottom；The adjacent beams fill up flexible filler 6 in 3 gaps；In the notch from
Dual-component polyurethane perfusion metalling 2, film layer 7 are successively arranged under upper, it includes rubble that metalling, which is perfused, in dual-component polyurethane
Layer, rubble layer surface are perfused with two-component polyurethane adhesive ramming material, and film layer 7 is set to the upper surface of transverse joint plate 4, and film layer 7 is used for
Dual-component polyurethane perfusion metalling can freely be slid on 4 surface of transverse joint plate；The notch is mated formation 1 phase with original
The interface of contact is equipped with multiple locating pins (preferably locating pin 8).
The two-component polyurethane adhesive ramming material layer is made of host agent and curing agent, and wherein host agent is polyalcohol and polyisocyanic acid
The end NCO performed polymer that ester reacts, wherein the mass fraction of-NCO group is 5% ~ 10%；Curing agent is mainly by active hydrogenation
Object, chain extender and filler composition, weight ratio are as follows: 100:5 ~ 15:50 ~ 100；It is additionally added in curing agent and accounts for curing agent weight
0.5% ~ 1.0% catalyst and the ultraviolet absorber of curing agent weight 0.1% ~ 1.0%.
The metalling includes at least two layers of metalling with single particle size rubble；The single particle size rubble be 3 ~
One of 5mm, 5 ~ 10mm, 10 ~ 15mm and 15 ~ 20mm；Further, the rubble is basalt or limestone.At this
In the preferred embodiment of invention, rubble is good, the hard basaltic broken stone of corner angle, and crush values are not more than 26%, Los Angeles mill
Consume, which is lost, is not more than 28%, and robustness is not more than 12%, and flat and elongated particle content is not more than 15%.Rubble uses preceding necessary clear
It washes, dry, and carry out damp-proof treatment.
In an embodiment of the present invention, metalling includes two layers, and the partial size of every layer of rubble can be identical or not
Together；In other embodiments of the invention, metalling can also include three layers, four layers, five layers etc., set with specific reference to actual needs
Fixed, the partial size of every layer of rubble can be same or different.
To prevent transverse joint plate 4 from deviateing 3 gaps of adjacent beams in telescopic material work progress, the flexible filler 6 and across
It stitches and is equipped with locating pin 5 between plate 4, for the two to be fixedly connected.In a preferred embodiment of the invention, it is stitched between adjacent beams 3
Gap direction is arranged an aperture every 30cm on 4 surface of transverse joint plate and hammers into locating pin 5 in flexible filler.
To further prevent telescopic material and the former cracking mated formation between 1, in notch with the former interface that 1 is in contact of mating formation away from slot
Drilling every 30cm along adjacent beams 3 gaps direction at bottom 1/3 ~ 3/4 and be implanted into φ 16mm locating pin 8(is preferably countersunk head steel nail
Or T-steel muscle), position corresponding to 4 edge of transverse joint plate is not to be exceeded in 8 protruded length of locating pin, and two sides locating pin 8 answers staggered row
Cloth；In a preferred embodiment of the invention, locating pin 8, which is interlocked, is located at notch and the 1/2 of the former interfacial level that 1 is in contact of mating formation
Place.
In a preferred embodiment of the invention, the transverse joint plate 4 is without constraint across seam steel plate, i.e., across seam surface of steel plate patch
Film is covered to realize that metalling freely sliding on 4 surface of transverse joint plate is perfused in dual-component polyurethane；The film layer 7 is that PE is thin
Film；The flexibility filler material 6 is polyurethane foamed material.
In the present invention, it is that rubble perfusion materia is flowed from gap in order to prevent that flexible filler 6 is filled up in 3 gaps of adjacent beams
Lose, filling flexible filler 6(be preferably polyurethane foamed material) before need first to clear up gap adjacent beams 3, remove
The sundries such as sandstone, sawdust may especially influence the solid object that 3 gaps of adjacent beams are normally stretched, and such as horizontal stalk is in adjacent beams 3
Between stone, steel bar end etc. in gap.
In the present invention, transverse joint plate 4(is preferably across seam steel plate) rubble perfusion materia in notch can not only be prevented from phase
The seam crossing in adjacent 3 gaps of beam is fallen down, moreover it is possible to bear top telescopic material (dual-component polyurethane perfusion metalling) transmitting
To the vertical vehicular load of lower layer's steel plate, the recess damage for generating expansion joint (i.e. 3 gaps of adjacent beams) is avoided.Of the invention
In preferred embodiment, the width of transverse joint plate 4 is about groove width 60% ~ 70%, and thickness is generally 8~10mm, and length is about 1m or so.
For prevent telescopic material (dual-component polyurethane perfusion metalling) and it is former mat formation 1 and pocket bottom transverse joint plate 4 between
Delamination, cracking carry out sandblasting punishment (i.e. notch with former 1 interface being in contact of mating formation) to notch two sides original 1 cross section of mating formation,
And binder is brushed in sandblasting punishment interface, it brushes with a thickness of 1 ~ 2mm, dosage is 1 ~ 1.2kg/m2.Binder is preferably through increasing
The epoxide-resin glue ramming material of tough modification, room temperature pull strength are not less than 15MPa, and tensile strength is not less than 10MPa, extension
Rate is not less than 100%.
A kind of construction method at room temperature filling type bridge gapless expansion joint, comprising the following steps:
Step 1: forming notch above 3 gaps of adjacent beams；The width of notch is greater than the width in 3 gaps of adjacent beams；
Step 2: carrying out sandblasting punishment to the former interface that 1 is in contact with notch of mating formation, forms sandblasting and punish interface；
Step 3: the filling flexible filler 6 in 3 body gap of adjacent beams, in pocket bottom (i.e. above 3 gaps of adjacent beams)
Seating surface pastes the transverse joint plate 4 of film；Preferably, film is PE film, and transverse joint plate 4 is across seam steel plate；
Step 4: layering dispenses single particle size rubble, then it is tamped, forms metalling；Preferably, plate is used
Rammer tamps it, and the single particle size rubble of spreading can be plurality of layers, and the specific number of plies determines according to actual needs；
Step 5: then being smoothed out in the rubble layer surface perfusion two-component polyurethane adhesive ramming material tamped, forms room temperature and fill
Note formula bridge gapless expansion joint.
Preferably, the step 2 is further comprising the steps of: sandblasting punishment interface brush binder, brush with a thickness of
1 ~ 2mm, dosage are 1 ~ 1.2kg/m2。
Preferably, the step 1 further includes cleaning notch with giant, then dries notch with flame thrower.
Preferably, between the step 3 and step 4 further include: at sandblasting punishment interface is away from pocket bottom 1/3 ~ 3/4
Interlaced arrangement (implantation) locating pin 8, with increase telescopic material (dual-component polyurethane perfusion metalling) and it is former mat formation it is viscous between 1
It connects；Transverse joint plate 4 is fixedly connected with flexible filler 6 using locating pin 5.
Preferably, the two-component polyurethane adhesive ramming material layer is made of host agent and curing agent, wherein host agent be polyalcohol and
The end NCO performed polymer that polyisocyanates reacts, wherein the mass fraction of-NCO group is 5% ~ 10%；Curing agent is mainly by living
Property hydride, chain extender and filler composition, weight ratio are as follows: 100:5 ~ 15:50 ~ 100；It is additionally added in curing agent and accounts for curing agent
The catalyst of weight 0.5% ~ 1.0% and the ultraviolet absorber of curing agent weight 0.1% ~ 1.0%.The two-component polyurethane adhesive ramming material
With upper flow regime, low modulus, the performance of high fracture elongation, the two-component polyurethane adhesive ramming material can construction time >=30min,
Refer to dry time≤12h；Tensile strength >=0.8MPa at 23 DEG C, fracture elongation >=600%；- tensile strength at 20 DEG C≤
2.0MPa, fracture elongation >=400%；Elastic restoration ratio (stretching 150% surely) >=80%.
Using the above method, one of present invention room temperature filling type bridge gapless expansion joint can be produced.
Embodiment one
A kind of construction method at room temperature filling type bridge gapless expansion joint, comprising the following steps:
(1) it cuts notch or removes old seam, expansion joint position is determined, when installing expansion joint, if not reserving between adjacent beams 3
Notch cuts notch along the position that oneself determines, the size of notch has to comply with design requirement；
(2) notch is cleaned with giant, removes floating scholar, dust and sundries in notch, is then dried with flame thrower
Dry notch fills out polyurethane foamed material in 3 gaps of adjacent beams, fills up, not interspace as far as possible；
(3) placement pastes one layer of PE film on the surface across seam steel plate, so across seam steel plate above 3 gaps of adjacent beams
Steel plate is stitched with positioning steel nail fixed span afterwards；
(4) blasting treatment is carried out to the former interface that 1 is in contact with notch of mating formation, and in the uniform cross after blasting treatment
Brushing binder is brushed with a thickness of 1 ~ 2mm, and dosage is 1 ~ 1.2kg/m2；
(5) basaltic broken stone that partial size is 10 ~ 15mm is uniformly dispensed in notch, is spread with a thickness of the 1/2 of depth of rebate,
Form first layer metalling；
(6) at sandblasting punishment interface away from drilling and be implanted into every 30cm along 3 gaps of adjacent beams direction at pocket bottom 1/2
φ 16mm countersunk head steel nail, two sides countersunk head steel nail are answered staggered；
(7) continue to dispense the basaltic broken stone that partial size is 10 ~ 15mm in notch, and flat with plate tamping；It can also be first
The bar planting on first layer metalling then proceedes to dispense partial size in notch as the basaltic broken stone of 10 ~ 15mm, and uses plate compactor
Shake is flat；
(8) upper flow regime being stirred, normal temperature cure, two-component polyurethane adhesive knot is directly perfused having shaken flat rubble surface
Expect and smoothes out；
It (9), can open to traffic after health for 24 hours.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of room temperature filling type bridge gapless expansion joint, it is characterised in that: including gap between adjacent beams, between adjacent beams
Notch above gap and the transverse joint plate set on pocket bottom；
Flexible filler is filled up in gap between the adjacent beams；
Dual-component polyurethane perfusion metalling, film layer, dual-component polyurethane perfusion are successively arranged in the notch from top to bottom
Metalling includes metalling, and rubble layer surface is perfused with two-component polyurethane adhesive ramming material；Film layer is set to the upper surface of transverse joint plate；
The notch is equipped with multiple locating pins in the interface being in contact of mating formation with original；
The preparation process of the dual-component polyurethane perfusion metalling are as follows:
Layering dispenses single particle size rubble, then tamps to it, forms metalling；
It is then smoothed out in the rubble layer surface perfusion two-component polyurethane adhesive ramming material tamped.
2. a kind of room temperature filling type bridge gapless expansion joint according to claim 1, it is characterised in that: the two-component
Polyurethane adhesive ramming material is made of host agent and curing agent, and wherein host agent is that the end NCO that polyalcohol and polyisocyanates react is pre-
Aggressiveness, wherein the mass fraction of-NCO group is 5% ~ 10%；Curing agent is mainly made of active hydride, chain extender and filler,
Weight ratio are as follows: 100:5 ~ 15:50 ~ 100；It is additionally added the catalyst for accounting for curing agent weight 0.5% ~ 1.0% in curing agent and consolidates
The ultraviolet absorber of agent weight 0.1% ~ 1.0%.
3. a kind of room temperature filling type bridge gapless expansion joint according to claim 1, it is characterised in that: the metalling
Including at least two layers of metalling with single particle size rubble；The single particle size rubble be 3 ~ 5mm, 5 ~ 10mm, 10 ~ 15mm and
One of 15 ~ 20mm.
4. a kind of room temperature filling type bridge gapless expansion joint according to claim 1, it is characterised in that: the flexibility is filled out
It is fixedly connected between material and transverse joint plate by locating pin.
5. a kind of room temperature filling type bridge gapless expansion joint according to claim 1, it is characterised in that: the transverse joint plate
Width be width of rebate 60 ~ 70%；The locating pin interlock be set to notch and the former interfacial level being in contact of mating formation 1/3 ~
At 3/4.
6. a kind of room temperature filling type bridge gapless expansion joint according to claim 1, it is characterised in that: the notch with
Original mats formation the interface being in contact equipped with adhesive layer.
7. a kind of construction method at room temperature filling type bridge gapless expansion joint, which comprises the following steps:
Step 1: notch is formed above gap between adjacent beams；
Step 2: the interface being in contact with notch of mating formation to original carries out sandblasting punishment, forms sandblasting and punish interface；
Step 3: the filling flexible filler in adjacent beam body gap, pastes the transverse joint plate of film in pocket bottom seating surface；
Step 4: layering dispenses single particle size rubble, then it is tamped, forms metalling；
Step 5: then smoothing out in the rubble layer surface perfusion two-component polyurethane adhesive ramming material tamped, room temperature filling type is formed
Bridge gapless expansion joint.
8. a kind of construction method at room temperature filling type bridge gapless expansion joint according to claim 7, it is characterised in that:
The step 2 is further comprising the steps of: binder brushed in sandblasting punishment interface, is brushed with a thickness of 1 ~ 2mm, dosage is 1 ~
1.2kg/m2。
9. a kind of construction method at room temperature filling type bridge gapless expansion joint according to claim 7, it is characterised in that:
Between the step 3 and step 4 further include: at sandblasting punishment interface away from interlaced arrangement locating pin at pocket bottom 1/3 ~ 3/4；
Transverse joint plate is fixedly connected with flexible filler using locating pin.
10. a kind of construction method at room temperature filling type bridge gapless expansion joint according to claim 7, feature exist
In: the two-component polyurethane adhesive ramming material layer is made of host agent and curing agent, and wherein host agent is that polyalcohol and polyisocyanates are anti-
The end NCO performed polymer that should be obtained, wherein the mass fraction of-NCO group is 5% ~ 10%；Curing agent is mainly by active hydride, expansion
Chain agent and filler composition, weight ratio are as follows: 100:5 ~ 15:50 ~ 100；Be additionally added in curing agent account for curing agent weight 0.5% ~
1.0% catalyst and the ultraviolet absorber of curing agent weight 0.1% ~ 1.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086092.5A CN106498848B (en) | 2016-11-30 | 2016-11-30 | A kind of room temperature filling type bridge gapless expansion joint and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086092.5A CN106498848B (en) | 2016-11-30 | 2016-11-30 | A kind of room temperature filling type bridge gapless expansion joint and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106498848A CN106498848A (en) | 2017-03-15 |
| CN106498848B true CN106498848B (en) | 2019-07-26 |
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| CN108252208A (en) * | 2018-03-07 | 2018-07-06 | 佛山科学技术学院 | A kind of bridge deformation seam |
| CN110965422B (en) * | 2019-12-13 | 2021-11-05 | 江苏中路工程技术研究院有限公司 | Flexible splicing paving structure and construction method thereof |
| CN111364353A (en) * | 2020-03-11 | 2020-07-03 | 南京林业大学 | A continuous bridge expansion joint structure |
| CN117468503B (en) * | 2023-11-14 | 2024-03-19 | 青岛文德超建筑工程有限公司 | Ultra-long concrete expansion joint-free structure and construction process thereof |
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