CN110055900A - A kind of bridgehead structures and its construction technology of hard and soft interspersion - Google Patents
A kind of bridgehead structures and its construction technology of hard and soft interspersion Download PDFInfo
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- CN110055900A CN110055900A CN201910393799.8A CN201910393799A CN110055900A CN 110055900 A CN110055900 A CN 110055900A CN 201910393799 A CN201910393799 A CN 201910393799A CN 110055900 A CN110055900 A CN 110055900A
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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
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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
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention discloses a kind of bridgehead structures of hard and soft interspersion, belong to highway engineering construction field, are arranged between bridge section and roadbed section, which is characterized in that basal layer, floor layer, earthfill road embankment layer and supercrust are rammed in the resonance including setting gradually from bottom to top.In addition, the present invention also provides a kind of end of the bridge construction technologies of hard and soft interspersion based on above-mentioned bridgehead structures.The present invention reinforces hard and soft interspersion bridgehead structures by basis, and stabilized baseplate does not settle, raising embankment first is that ventilation to protect roadbed not wet, second is that improve density, no longer settlement after construction；It is equipped with hard and soft interspersion again, there are rigid structure and flexible structure in subgrade and pavement, it lumps together, have just have it is soft, rigidity is greater than made road base segment, flexibility is greater than bridge structure, and a real end of the bridge changeover portion is formed between bridge and dirt road base, is also a real changeover portion from elasticity modulus.
Description
Technical field
The invention belongs to highway engineering construction fields, and in particular to a kind of bridgehead structures and its construction work of hard and soft interspersion
Skill.
Background technique
Currently, highway engineering, bridgehead structures design and construction have a national regulation, portion issues specification, standard, China's only high speed
The mileage open to traffic of highway just reaches at least 130,000 kilometers, has science of bridge building ten million, every bridge has 2 ends of the bridge, the quantity of end of the bridge
It is very huge.
However these ends of the bridge are made a general survey of, because end of the bridge, which is built up in latter 3 or five years, not to be repaired, does not jump vehicle the reason of bumping at bridge-head
It is fewer and fewer, it is difficult to see, social influence is very bad, and causes driving accident major hidden danger place, also therefore has occurred many
Traffic accident.Bumping at bridge-head maintenance cost is also quite high, is open to traffic on one side, one side maintenance construction, and repair quality is difficult to control, is difficult to ensure
Card, the safety of cost superelevation, construction personnel are also on the hazard.
In the prior art, the reason of causing bumping at bridge-head, or the reason of formation bumping at bridge-head, comprehensive descision mainly has following
Caused by one or several reasons:
1, the Lack of support of the following substrate of earth's surface, under the roadbed gravity pressure of embankment end of the bridge, the compression of substrate sinks to generating
End of the bridge integral sinking, caused by bumping at bridge-head.
2, the shallow area of surface water and subzero temperature area, water-soaked embankment soil or subzero temperature area are in freeze thawing season underground steam
Rise, frozen soil base melts, and also increases the water content of earthfill road embankment, soaks embankment soil；When embankment soil water content is more than most preferably to contain
When water, the compressive deformation that bullet generates is lost in the depression of bearing force of embankment, softening, causes the jump vehicle that bridgehead sinking generates.
3, it is insufficient newly to fill out embankment density, end of the bridge caused by further the naturally closely knit embankment for settling generation compresses after work is jumped
Vehicle.
4, the crack leak of transition slab at bridge head and platform back, road shoulder and made road base segment, the road under rain drop erosion transition slab at bridge head
Dike, the bumping at bridge-head that brow plate emptying sinks or attachment strap fracture generates.
5, cement concrete rigid bridge panel and transition slab at bridge head are directly docked with the upper layer of semi-rigid type base, from springform
It is hard and soft direct docking in amount, flexibility does not have changeover portion, and automobile tire, directly to flexibility, is made flexible end of the bridge repeatedly from rigidity
With, and lead to the Crack cause of bumping at bridge-head.
6, the superficial layer road surface Tan Ou of bridge expanssion joint, end of the bridge and bridge floor is compacted injustice, or has paver to be compacted connector,
Even three or five millimeters are uneven, truck tyre takeoffs at uneven place, falls, and huge impact force pounded repeatedly one
A position, the surface deformation of generation, the bumping at bridge-head of initiation.
In conclusion bumping at bridge-head is one of common fault of highway construction, solved so far without good method.
Summary of the invention
The technical problem to be solved in the present invention is to provide the bridgehead structures and its construction technology of a kind of hard and soft interspersion, pass through base
Plinth reinforces hard and soft interspersion bridgehead structures, and stabilized baseplate does not settle, and raising embankment is not first is that ventilation guarantor's roadbed is wet, second is that improving close
Degree, no longer settlement after construction；It is equipped with hard and soft interspersion again, there is rigid structure and flexible structure in subgrade and pavement, lumps together, has
Just had it is soft, rigidity be greater than made road base segment, flexibility be greater than bridge structure, real one is formed between bridge and dirt road base
A end of the bridge changeover portion is also a real changeover portion from elasticity modulus.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of bridgehead structures of hard and soft interspersion, be arranged between bridge section and roadbed section, which is characterized in that including from bottom to top according to
Basal layer, floor layer, earthfill road embankment layer and supercrust are rammed in the resonance of secondary setting.
In addition, the present invention also provides a kind of end of the bridge construction technology of hard and soft interspersion, it is special based on above-mentioned bridgehead structures
Sign is, comprising the following steps:
Step A, it clears up earth's surface and does smooth processing, form resonance rammer with resonating to ram reinforce to earth's surface before bridge section construction
Basal layer；
Step B, after the completion of bridge section construction, the surface of basal layer is rammed in cleaning resonance, and cast in situs Cement Concrete forms floor layer；
Step C, filling roadbed, and ram compacting with road roller and/or resonance and form earthfill road embankment layer；
Step D, casting cement concrete forms sub-surface and asphalt layer forms supercrust above sub-surface.
The beneficial effects of the present invention are:
1, it before bridge is started building, is rammed with resonance and processing reinforcing is carried out to substrate, is i.e. end of the bridge substrate is rammed with large-scale resonance and reinforced, i.e.,
It is rammed with earth contact pressure is powerful in the resonance of 1Mpa, contact area greater than 2m2, is used the substrate reinforced is handled with current methods
Resonance is rammed full rammer effect and is reinforced one time, and the bearing capacity of substrate is greatly improved, and forms resonance and rams substrate；2, pass through setting Cement Concrete
Floor solves substrate load uniformly and sound carries pressure dissipation, mitigates to the non-uniform problem of base pressure and common stress
The problem of carrying；3, ventilated layer is devised in floor layer and earthfill road embankment interlayer, it is ensured that the water content of embankment is maintained at low
Level keeps the drying of embankment, guarantees that embankment is maintained at stable state in any environment；4, the layering of earthfill road embankment is with altogether
The construction technology that consolidation process is rammed in vibration ensures that the density of embankment soil reaches the natural subsidence state after many years, and embankment soil is not after making work
Settle again compression and it is closely knit again；5, the middle base of sub-surface replaces the middle base in sub-surface with rigid cement concrete slab
Material structure solves the problems, such as to leak the embankment emptied under attachment strap under rainwater, while can cancel transition slab at bridge head；6, by hard and soft mixed
Cloth structure type, it may be assumed that the cement concrete slab (floor layer) under earth's surface and the basal plate of the middle base positioned at supercrust are rigid
Property fill subgrade and bituminous pavement be flexibility, bridgehead structures it is vertical on form the structure combining form of hard and soft interspersion,
A real end of the bridge changeover portion is formed between bridge and dirt road base.
The present invention is described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the schematic diagram of the bridgehead structures of the hard and soft interspersion of the present invention；
Fig. 2 is the structural schematic diagram of floor layer in the bridgehead structures of the hard and soft interspersion of the present invention.
In the accompanying drawings: 1 is that basal layer is rammed in resonance, and 2 be floor layer, and 2-1 is protrusion, and 3 be ventilated layer, and 4 be geotextiles,
5 be embankment layer, and 6 be road groove layer, and 7 be ground subsoil layer, and 8 be basal plate, and 9 be sub-surface upper layer, and 10 be under bituminous pavement
Surface layer, 11 be bituminous pavement lower layer, and 12 be bituminous pavement superficial layer；A represents bridge section, and B represents roadbed section.
Specific embodiment
Referring to attached drawing 1, the present invention provides a kind of bridgehead structures of hard and soft interspersion, setting bridge section A and roadbed section B it
Between.Above-mentioned bridgehead structures include that basal layer 1, floor layer 2, earthfill road embankment layer and road surface are rammed in the resonance set gradually from bottom to top
Layer.
Referring to attached drawing 2, floor layer 2 is cement concrete slab, and cement concrete slab width is equal with width of subgrade, and compression strength is greater than
25Mpa.Cement concrete slab bottom is similar to hull bottom shape, and thick middle, two sides are thin.Specifically, it is set in the middle part of cement concrete slab bottom surface
There are the downward raised 2-1 in bar shaped, raised 2-1 to seamlessly transit to two sides of the bottom, the height of raised 2-1 is 40-50cm, cement
The edge thickness of concrete plate is 20-30cm.
Ventilated layer 3, ventilated layer 3 are equipped with including mainly being advised by being greater than 4cm in floor layer 2 and earthfill road embankment interlayer
The air-permeable layer of rubble or the gravel composition of lattice partial size, the voidage of air-permeable layer is greater than 30%, with a thickness of 15-50cm.In air-permeable layer
Side is covered with geotextiles 4.
Earthfill road embankment floor includes embankment floor 5 and road groove layer 6.5 mono- layer of every 20cm of embankment layer is simultaneously compacted with road roller, every
1.5-2m or so rams full rammer with small-sized resonance and acts on one time.Road groove layer 6 is rammed with resonance and is reinforced.
Successively include from bottom to top in supercrust ground subsoil layer 7(and normal roadbed section B the same material of ground subsoil layer,
Stack pile is continuously constructed into one layer together), basal plate 8(be in cement concrete material, with normal roadbed section B base with thick；Construction
When, it is first do the middle base of normal roadbed section, rear to be poured basal plate 8), the road in sub-surface upper layer 9(and normal roadbed section B
The same material of face base upper layer, stack pile, are constructed into one layer together), in bituminous pavement cutting optimal 10(and normal roadbed section B
The same material of bituminous pavement cutting optimal, stack pile, are constructed into one layer together), bridge floor in bituminous pavement lower layer 11(and end of the bridge section A
Bituminous pavement lower layer and the same material of bituminous pavement lower layer, stack pile in normal roadbed section B, construct, continuously pave construction together
Molding) and bituminous pavement superficial layer 12(and bridge floor, the bituminous pavement superficial layer in end of the bridge section A and the pitch in normal roadbed section B
The same material of road surface layer, stack pile, construct together, and continuously pave construction molding).
Based on above-mentioned bridgehead structures, the present invention also provides a kind of end of the bridge construction technology of hard and soft interspersion, including it is following
Step.
Step A, it clears up earth's surface and does smooth processing, carried out before bridge section A construction with equipment such as road roller or vibro-rammers
It with resonance rams that earth's surface reinforce being formed to resonate after conventional ground consolidation process and rams basal layer 1.
Specifically, in addition to rock base, should all first clear turf, clear up earth's surface attachment.For Special Roadbed, should distinguish
Consolidation process is carried out using current methods；It for soil matrix, is pressed twice after leveling with vibrated roller, earth's surface is flattened.For soft
Soil base then carries out gravel pile reinforcing, Powder Spray Pile is reinforced or drainage pile carries out the construction such as reinforcing.
To the problem of substrate-loading deficiency, before embankment and before science of bridge building is started building, resonance is rammed to earth's surface
When being reinforced, selects earth contact pressure powerful and rammed in the resonance of 1Mpa, contact area greater than 2m2, first plum blossom-shaped acts on one time, smooth
Second time the null point that first pass leaves reinforce afterwards and forms full ram.Resonance ram play here again substrate be rapidly completed it is heavy
Drop, has the function that stable.After resonance rammer effect every square metre of the bearing capacity of basal layer can bearing capacity to reach 100T indeformable,
Resonate the effective closely knit big 15m of depth or so rammed, and effective reinforcing depth makes substrate reach absolute stability state up to 20m or so.
It arranges, flatten resonance and ram and make used substrate, shaping is compacted with road roller, and measures absolute altitude, using what is dug or fill out
The levelling substrate absolute altitude of method is simultaneously compacted.After completing above-mentioned steps, roadbed and bridge except end of the bridge can just be put into operation.
Step B, after the completion of bridge section A construction, surface and the compacting of basal layer 1, cast in situs Cement Concrete are rammed in cleaning resonance
Form floor layer 2.
Specifically, basal layer 1 is rammed in resonance shift to an earlier date prefabricated groove to form the raised 2-1 of floor layer 2.It rams and reinforces in resonance
In the substrate of processing, floor is designed in ground surface absolute altitude or so, floor layer makes to form Cement Concrete floor of cement concrete.It is logical
Setting Cement Concrete floor is crossed, the level of uniformly distributed basal layer carrying, the influence that reduction static load and mobile load generate substrate are reached.
It is similar hull bottom shape below floor layer, thick middle two sides are thin, with roadbed with wide.
Substrate is cleaned out, shaping re-starts compacting, formwork supporting plate, length 10-50m.Resistance to compression is poured in template slot
Intensity is greater than the cement concrete of 25Mpa or more, vibrates while being poured, and maintains an equal level, and floor layer 2 is formed after solidification.
Floor layer 2 form after, ventilated layer 3 is made above floor layer 2, it may be assumed that filling rubble or gravel formed it is ventilative
Layer.Then geotextiles 4(is covered above air-permeable layer in order to avoid embankment soil inserts the gap of ventilated layer, influence it is ventilated and
Accelerate the sinking of embankment).Ventilative layer material is the ragstones classes such as rubble or the gravel of 4-6cm or 6-8cm or the above specification
Pellet, thickness are greater than 15cm and are less than 50cm.
To solve the problems, such as that water-soaked embankment soil and subzero temperature area freeze thawing season embankment soil because bullet is lost in softening overly moist, are being additionally arranged
In the case that floor layer blocks water, and it is additionally arranged ventilated layer 3, it is ensured that the water content of embankment is maintained at low-level, keeps embankment
Drying, guarantee embankment be maintained at stable state in any environment.
Step C, filling roadbed, and ram compacting with road roller and/or resonance and form earthfill road embankment layer.
Embankment floor 5 and road groove layer 6 in earthfill road embankment floor.Consolidation process is rammed with the resonance of two kinds of models of size, it may be assumed that in soil
Embankment soil is filled out on work cloth 4, is often filled out thick 20cm with road roller and is compacted one layer, compactness should reach 93% or more；Thickness is often filled out to reach
When 1.5-2.0m, completely rammed one time with powerful rammed in the resonance of 1.0Mpa, contact area greater than 0.3m2 of earth contact pressure, operation Shi Xianmei
Flower-shape effect, then grade point that covers, form and completely ram one time.Mono- layer of every 20cm is compacted with road roller, every 1.5-2.0m with small-sized
The rammer that resonates acts on one time, until being filled to road slot absolute altitude (forming embankment floor 5)；After reaching road slot, then with earth contact pressure it is powerful in
The resonance that 1.0Mpa, contact area are greater than 2m2, which is rammed, completely rams one time, and leveling, health is banketed to road slot absolute altitude, then mends native levelling, use
Vibrated roller compacting (forms road groove layer 6).
The layering resonance of earthfill road embankment, which rams to reinforce and rammed in road slot absolute altitude with large-scale resonance, reinforces full rammer effect, it is ensured that embankment
The density of soil reaches the natural subsidence state after many years, make after work embankment soil no longer settle compression with it is closely knit again.
Step D, casting cement concrete forms sub-surface and asphalt layer forms supercrust above sub-surface.
The substrate of normal roadbed section B can also use reinforcing same as the present invention using conventional reinforcing mode
Mode.
Road slot is arranged, ground subsoil layer is made.Ground subsoil when construction forms ground subsoil layer 7, with normal roadbed section B
The same material of layer, stack pile, are continuously constructed into one layer of overall structure together.
When construction forms basal plate 8, the middle base of normal roadbed section is first done, then casting forms basal plate 8.Basal plate
8 are made by cement concrete material, and the compression strength of concrete reaches 25Mpa or more, with a thickness of 15-22cm, are located in road surface base
It on the underlayment of layer, is directly connected with bridge platform back, with base among the above with thick with width, length is greater than 15m and is less than 30m.More
Specifically, road shoulder is trained, highly reaches groundwork thickness in road surface, length is design length, and on the ground subsoil floor after the slot of road
Cast-in-site Cement Concrete, intensity reach designed elevation, length, thickness, meet design requirement, vibrate, flatten, with platform in casting
Back connection.
This design arrangement solves the problems, such as follows: a, constructed using cast-in-place mode, surrounding and platform back, the road shoulder of basal plate 8
The tight silk of equal combinations is seamless, will not leak a drop water；Again due on basal plate 8 there are also one layer of inorganic binder and bituminous pavement,
It is exposed to the sun and what influence is not generated on it with low temperature, natural temperature changes the influence very little to it, will not cause the heat expansion of basal plate 8
Shrinkage, therefore basal plate 8 will not both carry on the back platform and generate thrust, will not disconnect seam, solve leakage under rainwater and empty under attachment strap
Embankment problem.B, since basal plate 8 is located in the middle layer of base, above there are also one layer of base, have a Duan Ji of basal plate
Greatly more are wanted in the section top surface for the not basal plate that layer top surface is connected with concrete section on elasticity modulus, and this section is because have
The elasticity modulus of the participation striaght cement concrete bridge floor of inorganic binder is again small, forms rigid-flexibility transition section truly.
When constructing sub-surface upper layer 9, and the same material of sub-surface upper layer, the stack pile in normal roadbed section B,
It is constructed into one layer of overall structure together.Without connector within the scope of away from abutment back side 80m, the compacting that once paves is formed.
When constructing bituminous pavement cutting optimal 10, with the same material of bituminous pavement cutting optimal in normal roadbed section B, same to thickness
Degree, is constructed into one layer of overall structure together.
When constructing bituminous pavement lower layer 11, in the bituminous pavement lower layer and normal roadbed section B of bridge floor in end of the bridge section A
The same material of bituminous pavement lower layer, stack pile, construct together, and the construction molding that continuously paves is an integral structure.
When constructing bituminous pavement superficial layer 12, in bridge floor, end of the bridge section A bituminous pavement superficial layer and normal roadbed section
The same material of bituminous pavement superficial layer, stack pile in B, construct, the construction molding that continuously paves is an integral structure together.
When the above construction, when paving, before and after end of the bridge or before and after the platform of abutment back within the scope of 80m, it is necessary to keep continuous
It paves, inaccurate paver stopping paves, and road roller is also not allowed to stop and change direction, compactness within the scope of 20m before and after platform is carried on the back
Design requirement need to be reached.Complete the construction of hard and soft interspersion end of the bridge.
Floor layer 2 and basal plate 8 are rigid structure in the present invention, and one is located at ground level, and one is located at middle base layer structure
In.Between two pieces of rigid plates, be soil matrix under floor layer 2 and on basal plate 8.Air-permeable layer, base and bituminous pavement top,
For flexible structure.Bridgehead structures after above-mentioned rigid structure and flexible structure composition are formed interspersion structure.
It is the configuration of the present invention is simple, easy for construction, low in cost, it is rammed and is reinforced by the resonance under ground portion, improve base
The bearing capacity at bottom, every square metre carries up to 100T or more, thoroughly solves the problems, such as substrate sinking.The bearing capacity of floor layer 2
Greatly, it is located in and is rammed on the ground reinforced through resonance, form floor, and be a similar hull bottom type structure, both dispersed to substrate
Pressure, and keep substrate stress uniformly distributed, prevent from unevenly declining.Ventilated layer 3 can guarantee the drying of embankment, ventilated layer
Dirt road dike on 3 will not compress sinking because of the big soil softening of temperature, and primary completely rammer consolidation process is rammed in the resonance on the slot of road, really
The compactness of earthfill road embankment has been protected, has thoroughly solved the problems, such as the settlement after construction of bridgehead filled soil.Basal plate 8 is the middle base on conventional road surface
Layer, with cement concrete slab instead of the middle base of equal thickness, and is cast-in-place Cement Concrete.Since basal plate 8 is located at road surface and upper base
Under, to the sensibility very little of temperature, summer shine it is impermeable, shine not hot, winter freezes not, and is cast-in-place, first is that ensure that and bridge
The connection at the platform back side is waterproof, water-tight；Second is that seated position determines the superficial layer compression modulus of end of the bridge section；Than bridge floor section
It is soft, it is harder than pure roadbed section, become real rigid-flexibility transition section.To thoroughly solve the highway persistent ailment of bumping at bridge-head, both may be used
To guarantee safer, transportation safety of driving a vehicle, maintenance and repair expense is also significantly reduced, is achieved many things at one stroke, economic benefit, society's effect
Benefit is huge.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (9)
1. a kind of bridgehead structures of hard and soft interspersion are arranged between bridge section (A) and roadbed section (B), which is characterized in that including certainly
Basal layer (1), floor layer (2), earthfill road embankment layer and supercrust are rammed in the resonance set gradually on down.
2. the bridgehead structures of hard and soft interspersion according to claim 1, it is characterised in that: the floor layer (2) is Cement Concrete
Plate, the cement concrete slab width is equal with width of subgrade, and compression strength is greater than 25Mpa.
3. the bridgehead structures of hard and soft interspersion according to claim 2, it is characterised in that: the middle part of the cement concrete slab bottom surface
Equipped with downward protrusion (2-1), the protrusion (2-1) seamlessly transits to two sides of the bottom, and the height of the protrusion (2-1) is 40-
50cm, the edge thickness of the cement concrete slab are 20-30cm.
4. the bridgehead structures of hard and soft interspersion according to claim 1, it is characterised in that: in the floor layer (2) and described
Earthfill road embankment interlayer is equipped with ventilated layer (3), and the ventilated layer (3) includes mainly by being greater than the broken of 4cm specification partial size
The voidage of the air-permeable layer of stone or gravel composition, the air-permeable layer is greater than 30%, with a thickness of 15-50cm.
5. the bridgehead structures of hard and soft interspersion according to claim 4, it is characterised in that: covered in the top of the air-permeable layer
There are geotextiles (4).
6. the bridgehead structures of hard and soft interspersion according to claim 1, it is characterised in that: the earthfill road embankment layer includes embankment
Floor (5) and road groove layer (6).
7. a kind of end of the bridge construction technology of hard and soft interspersion, is based on bridgehead structures described in any one of claims 1-6, feature exists
In, comprising the following steps:
Step A, it clears up earth's surface and does smooth processing, reinforcing is carried out to earth's surface with resonance rammer before bridge section (A) construction and is formed altogether
Basal layer (1) is rammed in vibration；
Step B, after the completion of bridge section (A) construction, the surface of basal layer (1) is rammed in cleaning resonance, and cast in situs Cement Concrete forms ground
Plate layer (2)；
Step C, filling roadbed, and ram compacting with road roller and/or resonance and form earthfill road embankment layer；
Step D, casting cement concrete forms sub-surface and asphalt layer forms supercrust above sub-surface.
8. the end of the bridge construction technology of hard and soft interspersion according to claim 7, which is characterized in that resonance rammer pair in step
When earth's surface is reinforced, to select earth contact pressure powerful and rammed in the resonance of 1Mpa, contact area greater than 2m2, first plum blossom-shaped acts on one time,
Then second time the null point that first pass leaves reinforce and form full ram.
9. the end of the bridge construction technology of hard and soft interspersion according to claim 7, which is characterized in that floor layer (2) in stepb
After molding, rubble is filled on floor layer (2) or gravel forms air-permeable layer and covers geotextiles (4) above air-permeable layer.
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