CN106192650A - The operation highway bridgehead vehicle jump coordinating to control based on malformation disposes structure and method - Google Patents
The operation highway bridgehead vehicle jump coordinating to control based on malformation disposes structure and method Download PDFInfo
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- CN106192650A CN106192650A CN201610600895.1A CN201610600895A CN106192650A CN 106192650 A CN106192650 A CN 106192650A CN 201610600895 A CN201610600895 A CN 201610600895A CN 106192650 A CN106192650 A CN 106192650A
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- grouting
- pile
- enhancement layer
- roadbed
- stake
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
Abstract
The invention discloses a kind of operation highway bridgehead vehicle jump coordinating to control based on malformation and dispose structure and method.Between this disposal structure is bottom roadbed bearing pile and embankment, form several by high-pressure grouting and there is certain thickness and intensity and the high-pressure rotary-spray pile body of rectangular array arrangement, adjacent high-pressure rotary-spray pile body is mutually twisted and forms the grouting enhancement Layer parallel with road surface, roadbed bearing pile top is stretched in grouting enhancement Layer, by grouting enhancement Layer by upper load uniform distribution to roadbed bearing pile and soft soil foundation.And the core of the method is to utilize single tube high-pressure rotary-spray method to form required grouting enhancement Layer.Upper load uniform distribution to bearing pile and soft soil foundation can be effectively reduced the soft soil roadbed load born by the present invention, can have the posterior settlement controlling roadbed.
Description
Technical field
The invention belongs to construction method field, be specifically related to a kind of operation highway end of the bridge coordinated based on malformation and control
Jump car and dispose structure and method.
Background technology
Bumping at bridge-head refers to the structures itself such as highway engineering Bridge, the culvert differential settlement with abutment back embankment of operating
Difference or the sudden change of bigger longitudinal gradient, cause vehicle to produce the phenomenon jumped of jolting when quickly through road and bridge intersection, as shown in Figure 1.
The mode the most generally using soft soil roadbed consolidation by grouting, top to increase hazard to bridge's pier is disposed, but does not indicate and affect bridge
The key link of head jumping car phenomenon.
Pressure Revolving Blast-Grout is a kind of common soft soil foundation reinforcing method.Pressure Revolving Blast-Grout is to utilize rig
Deng, after the special nozzle being arranged on Grouting Pipe bottom sides is inserted soil layer desired depth, raw with the contour Hair Fixer of high pressure slurry pump
Device, ejects serosity from nozzle, the impact failure soil body.Simultaneously by rotation and the lifter motion of Grouting Pipe, make slurry
What liquid got off with avalanche on the soil body soil stirring mixes, and solidifies through certain time, just forms columned induration in soil,
I.e. rotary churning pile.In the provisioning process surrounding soil is had certain compacted compaction, the i.e. side friction of stake due to rotary churning pile,
Make the soft layer bearing power increase around stake.After churning terminates, when cement-soil mixed serum not yet condenses, this slurry
Liquid will produce extruding force, have compaction to surrounding soil, and makes fraction slurries enter in the space between grogs, be formed " arteries and veins "
Shape, " plate " shape cement Seed harvest.Although but the pile body of this form can provide enough supporting forces, but at the position not having pile body
The most easily producing sedimentation, the stress of top embankment is the most uneven.If things go on like this, road surface still can produce differential settlement, leads
Cause to jump car phenomenon.
Applicant administers the on-the-spot coring result of grouting and reinforcing process for tens soft soil roadbed bumping at bridge-head and shows, at present
Soft soil roadbed in substantially there is no clear and definite Rational structure carrying system.Even if using Pressure Revolving Blast-Grout to form rotary churning pile,
Also only having tree root state slurry arteries and veins etc. and be encrypted in the middle of roadbed or soft soil foundation, it is soft soil roadbed uneven heavy still to easily lead to
Fall, ultimately results in the generation of vehicle bump at bridge ends.
Summary of the invention
It is an object of the invention to solve that vehicle bump at bridge ends present in prior art is not effectively controlled asks
Topic, and provide a kind of operation highway bridgehead vehicle jump coordinating to control based on malformation to dispose structure, form pile soil common action
Roadbed carrying system, reaches roadbed force and deformation state globality requirement, and the later stage effectively controlling roadbed continues sedimentation, it is ensured that bridge
The disposal effect of head jumping car.For solving this technical problem, the technical solution adopted in the present invention is as follows:
The operation highway bridgehead vehicle jump coordinating to control based on malformation disposes structure, bottom roadbed bearing pile and embankment
Between, form several by high-pressure grouting and there is certain thickness and intensity and the high-pressure rotary-spray pile body of rectangular array arrangement,
Adjacent high-pressure rotary-spray pile body is mutually twisted and forms the grouting enhancement Layer parallel with road surface, and roadbed bearing pile top is stretched into grouting and added
In strong layer, by grouting enhancement Layer by upper load uniform distribution to roadbed bearing pile and soft soil foundation.
Embankment grouting enhancement Layer has certain strength and stiffness, can top embankment and vehicular load be passed to bottom
Pass, form pile soil common action roadbed carrying system.For the carrying system only arranging high-pressure rotary jet grouting pile, it can
The conduction being more uniformly distributed by load above embankment is to pile body and Soft Soil Layer so that soft soil roadbed sedimentation has globality, symbol
Fastening deformation coordinates the requirement controlled.
Another object of the present invention is to provide a kind of coordinate at the operation highway bridgehead vehicle jump of control based on malformation
Put method, i.e. the construction method of said structure.The method step includes:
S1: the original road surface treating disposal section is removed；
S2: carry out roadbed bearing pile construction, arranges some row's roadbed bearing piles in soft soil foundation；
S3: use single tube high-pressure rotary-spray method the filler bottom embankment to be carried out cured, on roadbed bearing pile and road
Between bottom dike, form several and there is certain thickness and intensity and the high-pressure rotary-spray pile body of rectangular array arrangement, adjacent
High-pressure rotary-spray pile body is mutually twisted and forms the grouting enhancement Layer parallel with road surface；Roadbed bearing pile top embedment grouting enhancement Layer one
Set a distance；
S4: carry out embankment reparation and pavement construction.
The core of said method is to utilize single tube high-pressure rotary-spray method to form required grouting enhancement Layer.Based on the party
Method, present invention also offers following preferred implementation.
As preferably, in described S1, carry out road surface tear open initially with pavement milling machine or backhoe excavating machine vibration big gun head
Removing, the waste residue of road pavement dismounting simultaneously is cleared.
As preferably, in described S2, roadbed bearing pile is in the plane in quincuncial arrangement；Front some rows are started from abutment
Stake is long identical, shortens length the most successively；Roadbed bearing pile laterally uses unified stake long along road surface.In the present invention, along road
Face longitudinal direction refers to the bearing of trend along road, laterally refers to direction that is the most perpendicular with longitudinal direction and that be parallel to road surface along road surface, lower same.
Further, described roadbed bearing pile uses two-way cement mixing pile, and its construction method is:
1) roadbed bearing pile location and pile foundation are in place；
2) cut soil sinking, whitewash: A) River Bank Stability: the serosity of two-way cement mixing pile uses 42.5 Portland cements
For firming agent, cement consumption is 65kg/m, the ratio of mud 0.50；During stirring mortar, should first add water, then by mixing cement, every time
Mortar mixing time must not be less than 2min, is fully mixed thoroughly by cement mortar；Cement mortar is when aggregate bin poured into by mortar mixer, it is necessary to
Sieves, picks out cement lump；B) serosity conveying: cement mortar is delivered to two-way cement mixing by squeeze mortar pump press-in sebific duct
In the drilling rod of stake machine, finally the grout outlet from interior drilling rod is injected in the soil body；C) soil sinking is cut: start blender, make blender edge
Leading truck, to incision soil, opens slurry pump to soil body water-spray type slurry simultaneously, during whitewashing the pump pressure of slurry pump control 0.25～
0.4Mpa；Two groups of the most forward and reverse circumgyration incisions of blade of two-way cement mixing pile machine, the stirring soil body, until projected depth,
Stirring was persistently whitewashed no less than 15 seconds in the stake end；Inside and outside rod rotation speed >=50r/min during lower brill, drilling rod running speed controls 0.5
～0.8m/min；
3) stirring promotes: A) closedown slurry pump, lifting blender, two groups of blade the most forward and reverse Stirring soil cements,
Until embankment upper surface；B) lifting process controls inside and outside rod rotation speed >=50r/min, drilling rod promote speed controlling 0.7～
1.0m/min；
4) stake machine moves to next position, repeats step 1)～3).
As preferably, arrange along road surface rectangular array in the design stake position of described single tube high-pressure rotary-spray method, Mei Gecheng
Stake circumference equal with between its pile that horizontally and vertically direction is adjacent is mutually embedding；Ram machine construction trend for first along road surface laterally from side
First stake position start to construct one by one to opposite side, more reversely start to construct one by one to another from the adjacent row of homonymy first stake position
Side, constantly circulates.
Further, single tube high-pressure rotary-spray method forms specifically comprising the following steps that of grouting enhancement Layer
1) after rig is in place, pile foundation is carried out leveling, centering, adjusts the perpendicularity of stake machine, it is ensured that drilling rod is consistent with stake position,
Deviation is within 10mm, and borehole perpendicularity error is less than 0.3%；
2) after drilling machine test running is normal, start to draw hole drill and enter；
3) creep into and draw hole to after projected depth, extract drilling rod, and change jet groutinl pipe and be inserted into projected depth；
4) after jet groutinl pipe inserts projected depth, slush pump, the most from bottom to top churning are connected；During injection, first should
Reach predetermined expulsion pressure, promote churning pipe in slip casting after whitewashing, to prevent from twisting off churning pipe；For ensureing the quality at the bottom of stake,
When nozzle sinks to projected depth, rotate in situ to aperture grout normal after again churning promote；The rotation of drilling rod and lifting
Should be carried out continuously, must not interrupt；
5) when churning rises to grouting enhancement Layer elevation of top, stop the rotation shotcrete pipe, slowly promotes shotcrete pipe and goes out aperture,
Slurry pump continues slip casting in hole in the process, it is ensured that more than enhancement Layer be full of cement mortar in boring；
6) according to design stake machine stake position and construction trend, make a machine move and construct to next stake position.
As preferably, during the construction of roadbed bearing pile, in roadbed bearing pile top mark height above embankment part, blender sink and
Only stirring, not slip casting in lifting process.
As preferably, design grout hole in mixing pile stake position, after grouting enhancement Layer is completed by single tube high-pressure rotary-spray method,
Grouting enhancement Layer above mixing pile machine disturbance embankment part is carried out grouting and reinforcing.
As preferably, the boring stayed when high-pressure grouting for grouting enhancement Layer above embankment part, in grouting reinforcement
Layer has been in the milk during rear hoisting grouting pipe, carries out boring without pressure grouting, is full of cement mortar, shape after solidification in making boring
Become cement obturator.
The present invention has the beneficial effect that it:
1, by the grouting enhancement Layer bottom embankment, can by upper load uniform distribution to bearing pile and soft soil foundation,
Effectively reduce the soft soil roadbed load born, can have the posterior settlement controlling roadbed.
2, only at roadbed quincuncial arrangement bearing pile, the embankment grouting thickness that the method is formed is only 1m, relatively conventional road
Base grouting process, processes the degree of depth little, and construction cost reduces about 20%.
3, present invention construction only relates to grouting and pile foundation processes, and construction can carry out on existing road surface, can pass through road
The mode of face single width construction is carried out, and reduces the impact of road pavement traffic.
Accompanying drawing explanation
Fig. 1 is the longitudinal structure coordinating the operation highway bridgehead vehicle jump disposal structure controlled based on malformation of the present invention
Figure；
Fig. 2 is the carrying system transverse structure figure shown in A-A section in Fig. 1；
Fig. 3 is the bearing pile site plan shown in B-B section in Fig. 1；
Fig. 4 is the carrying system stress sketch of the present invention；
Fig. 5 be the present invention rotary churning pile arrange and construction move towards figure.
Detailed description of the invention
With detailed description of the invention the present invention it is further elaborated below in conjunction with the accompanying drawings and illustrates.In the present invention, each is implemented
The technical characteristic of mode, on the premise of not colliding with each other, all can carry out respective combination.
The present invention controls the operation highway bridgehead vehicle jump coordinating control based on malformation that vehicle bump at bridge ends is used
Dispose structure as shown in Figure 1.Its principle be bottom roadbed bearing pile and embankment between, by high-pressure grouting formed several tool
Having certain thickness and intensity and the high-pressure rotary-spray pile body of rectangular array arrangement, adjacent high-pressure rotary-spray pile body is mutually twisted formation
The grouting enhancement Layer parallel with road surface, the load conducted as an integrated carrying top embankment or vehicle.Roadbed bearing pile top
Portion stretches in grouting enhancement Layer, by grouting enhancement Layer by upper load uniform distribution to roadbed bearing pile and soft soil foundation.Enter
One step, as in figure 2 it is shown, roadbed bearing pile is on longitudinal along road surface, start front some campshed length from abutment identical.Such as Fig. 1 institute
Show, shorten length the most successively；Roadbed bearing pile laterally uses unified stake long along road surface.
The present invention uses single tube high-pressure rotary-spray method to construct said structure on operation road.The reality of construction technology
The process of executing is broadly divided into roadbed cement-soil stirring pile construction, embankment grouting enhancement Layer construction and embankment reparation and pavement construction three
Divide content.Construction technology process is as follows:
1, dispose original road surface, section to remove.
According to road surface types, pavement milling machine or backhoe excavating machine vibration big gun head can be used to carry out road surface dismounting.Road surface
After dismounting waste residue has been cleared, the construction of roadbed bearing pile can be started.
2, roadbed bearing pile (employing cement mixing method) construction
(1) bearing pile uses cement mixing method, construction to use single-axis bidirectional cement-soil mixing pile machine.
(2) bearing pile is arranged:
1) stake footpath 650mm.
2) as it is shown on figure 3, quincuncial arrangement in plane, stake is 1000mm in longitudinal direction and transverse center spacing.
3) 9 rows it are longitudinally arranged.First row bearing pile edge leaves abutment edge 500mm.Arrange to last from abutment edge
A length of 8500mm always disposed by pile center's line.
4) along road surface, longitudinal the 1st to the 4th campshed length by abutment all uses 10000mm.Arranging the beginning from the 5th, stake is long
Length is shortened the most successively according to 500mm.
5) bearing pile laterally uses uniform length along embankment.Lateral-loaded pile radical according to width of subgrade according to 1000mm between
Determine away from calculating.
6) bearing pile embedment top embankment grouting enhancement Layer 300mm.
(3) cement-soil stirring pile construction:
1) mixing pile location and pile foundation are in place
A) in-site measurement location is carried out according to piling plan.The accurate location of stake is surveyed and is set on embankment, each stake
A little timber is made a call in position, in order to stake machine centering, keeps stake position correct.
B) pile foundation is in place, centering.
2) soil sinking, whitewashing are cut
A) River Bank Stability: the serosity of two-way cement mixing pile uses 42.5 Portland cements to be firming agent, cement is used
Amount is 65kg/m, the ratio of mud 0.50.During stirring mortar, should first add water, then by mixing cement, each mortar mixing time must not
Less than 2min, cement mortar is fully mixed thoroughly.Cement mortar is when aggregate bin poured into by mortar mixer, it is necessary to sieves, and cement is hard
Block is picked out.The capacity of aggregate bin not less than one pile need cement mortar consumption, it is ensured that will not because serosity is under-supply broken pile,
Aggregate bin is unsuitable excessive simultaneously, it is to avoid too much produces precipitation because of serosity and causes concentration of slurry not enough.
B) serosity conveying: cement mortar is delivered to two-way cement mixing pile by the sebific duct that squeeze mortar pump press-in internal diameter is Φ 32
In the drilling rod of machine, finally the grout outlet from interior drilling rod is injected in the soil body.It is pumped the Pressure gauge by being arranged on slurry pump to control,
During whitewashing, the pump pressure of slurry pump controls 0.25～0.4MPa.
C) cut soil sinking: start blender, make blender along leading truck to incision soil, open slurry pump simultaneously and spray to the soil body
Cement mortar, two groups of the most forward and reverse circumgyration incisions of blade, stirring soil bodys, until projected depth, persistently whitewashing stirring at the bottom of stake not
Less than 15 seconds.Inside and outside rod rotation speed >=50r/min during lower brill, drilling rod running speed controls 0.5～0.8m/min.
3) stirring promotes
A) slurry pump is closed, lifting blender, two groups of blade the most forward and reverse Stirring soil cements, until table on embankment
Face.
B) lifting process needs strict control volume drilling speed degree, the soil cement whitewashed is stirred further, during lifting
Inside and outside rod rotation speed >=50r/min, drilling rod promotes speed controlling 0.7～1.0m/min.
4) stake machine moves to next position, repeats step 1)～3).
3, embankment grouting enhancement Layer construction
(1) use single tube high-pressure rotary-spray method that filler in the range of bottom embankment 1 meter is carried out cured, bottom embankment
Form the thick embankment enhancement Layer of 1m, uniformly transfer upper load to bearing pile and soft soil roadbed.
(2) using diameter 700mm, center distance is that the single pipe method high-pressure rotary jet grouting pile of 600mm is mutually twisted, and formation has whole
The embankment enhancement Layer of body.Enhancement Layer thickness is 1m.
(3) in the range of road surface, high-pressure rotary-spray construction is carried out at roadbed top, beyond the outer portion of road surface scope, and be at roadbed
In side slope, erection construction platform is carried out.
(4) single tube high-pressure rotary-spray construction major mechanical:
Jumbolter: MGJ-50；
Slurry pump: XPB-90KW；
Mortar mixer: 2.2KW.
(5) single tube high-pressure rotary-spray construction
As it is shown in figure 5, the design stake position of single tube high-pressure rotary-spray method along road surface rectangular array arrange, each pile and its
Between the pile that horizontally and vertically direction is adjacent, equal circumference is mutually embedding, to ensure can effectively be engaged between pile body, is integrally formed.
Ram machine construction trend is last position first laterally starting from the first stake position of side along road surface to construct one by one to opposite side,
Reversely on the right side of this position, the first stake position of an adjacent row starts last position constructed one by one to opposite side, the most again
To discharging into row construction to the 3rd, constantly circulate.This position is designed to ensure that final pile all can be mutually embedding with circumference, and mutually stings
The occlusion thickness of 100mm is had, it is sufficient to form an entirety and undertake the load on top between the pile body closed.And this construction trend can
Before ensureing that next pile driving construction is complete, the serosity ot-yet-hardened of previous stake, both can mutually merge, it is achieved pile body is stung
Close.Main construction process is as follows:
1) rig is in place
According to design ram machine construction trend and stake position, a machine is made to move in place.After rig is in place, pile foundation is carried out leveling,
Centering, adjusts the perpendicularity of stake machine, it is ensured that drilling rod is with stake position always.Deviation should be within 10mm, and borehole perpendicularity error is less than
0.3%.Air compressor machine, slush pump should be debugged before boring, make equipment operation normal.
2) draw hole drill to enter
After drilling machine test running is normal, starts to draw hole drill and enter.Boring procedure is wanted itemized record drilling rod joint number, it is ensured that
Drilling depth.
3) extract drilling rod, insert Grouting Pipe
Creep into that to draw hole thick to projected depth, extract drilling rod, and change jet groutinl pipe and be inserted into desired depth.
4) after jet groutinl pipe inserts projected depth, slush pump, the most from bottom to top churning are connected.During injection, first should
Reach predetermined expulsion pressure, promote churning pipe in slip casting after whitewashing, to prevent from twisting off churning pipe.For ensureing the quality at the bottom of stake,
When nozzle sinks to projected depth, rotating about 10 seconds in situ, after aperture grout is normal, churning promotes again.The rotation of drilling rod
Turn and promote and should be carried out continuously, must not interrupt.
5) when churning rises to enhancement Layer elevation of top, stop the rotation shotcrete pipe, slowly promotes shotcrete pipe and goes out aperture, at this
During slurry pump continue slip casting in hole, it is ensured that more than enhancement Layer boring in be full of cement mortar.
6) according to design stake machine stake position and construction trend, make a machine move and construct to next stake position.
The state modulator of high-pressure rotary-spray is as follows:
The cement mortar ratio of mud: 1:1 (cement selects 42.5 Portland cements)；
Grouting pressure: more than 20MPa；
Shotcrete pipe promotes speed: 20-28cm/min；
Shotcrete pipe rotary speed: 20-25r/min；
Cement consumption: not less than 210kg/m.
4, embankment reparation and pavement construction
(1) embankment body disturbance treatment
During bearing pile and rigid layer grouting construction, mixing pile machine is sinking with meeting in lifting process to stake footpath scope
Interior embankment produces stirring disturbance, destroys the original degree of compaction of embankment fill material.Meanwhile, during rigid layer grouting construction, drilling machine
Also embankment material can be produced disturbance, and leave boring.To this end, in work progress, embankment disturbance unit will be divided and locate
Reason.
1) during cement-soil stirring pile construction, in roadbed bearing pile top mark height above embankment part, blender sinks and promotes
During only stirring, not slip casting.
2) during rigid layer grouting construction, design grout hole in mixing pile stake position, use the grouting of single tube high-pressure rotary-spray method
After enhancement Layer has been in the milk, mixing pile machine disturbance embankment part above to enhancement Layer need to carry out grouting and reinforcing, slip casting is according to rigidity
Layer slip casting requires to carry out on an equal basis.
3) boring stayed time for grouting enhancement Layer above embankment partial high pressure grouting, has been in the milk at grouting enhancement Layer
Become, during hoisting grouting pipe, boring is carried out without pressure grouting, in making boring, be full of cement mortar, form cement after solidification and fill out
Fill body.
By above-mentioned processing method, while guaranteeing that embankment disturbance unit gets reliable treatments, embankment structure is also had
Integrally stiffened effect.Otherwise, embankment part can cause internal structure because the various borings in work progress and other disturbances
There is hidden danger in stability.
(2) road deck construction
Road deck construction is carried out according to design requirement.
The carrying system stress that construction method of the present invention ultimately forms is as shown in Figure 4.Embankment and road vehicle load are by all
It is delivered in the stress system being collectively forming by stake and the soil body evenly.After certain city's national highway uses said method to be disposed, operation
Four there is not vehicle bump at bridge ends every year.This shows that the structures and methods carrying system of the present invention is reasonable, efficiently controls
Soft soil roadbed differential settlement.And the embankment grouting thickness formed is only about 1m, relatively conventional grouting of road bed technique, place
The reason degree of depth is little, makes construction cost reduce about 20%.
Embodiment described above is the one preferably scheme of the present invention, and so it is not intended to limiting the invention.Have
Close the those of ordinary skill of technical field, without departing from the spirit and scope of the present invention, it is also possible to make various change
Change and modification.The technical scheme that the most all modes taking equivalent or equivalent transformation are obtained, all falls within the guarantor of the present invention
In the range of protecting.
Claims (10)
1. the operation highway bridgehead vehicle jump coordinating to control based on malformation disposes structure, it is characterised in that hold at roadbed
Between carrying bottom stake and embankment, form several by high-pressure grouting and there is certain thickness and intensity and rectangular array arrangement
High-pressure rotary-spray pile body, adjacent high-pressure rotary-spray pile body is mutually twisted and forms the grouting enhancement Layer parallel with road surface, roadbed bearing pile
Top is stretched in grouting enhancement Layer, by grouting enhancement Layer by upper load uniform distribution to roadbed bearing pile and soft soil foundation.
2. the operation highway bridgehead vehicle jump method of disposal coordinating to control based on malformation, it is characterised in that including:
S1: the original road surface treating disposal section is removed；
S2: carry out roadbed bearing pile construction, arranges some row's roadbed bearing piles in soft soil foundation；
S3: use single tube high-pressure rotary-spray method the filler bottom embankment to be carried out cured, at the bottom of roadbed bearing pile and embankment
Between portion, form several and there is certain thickness and intensity and the high-pressure rotary-spray pile body of rectangular array arrangement, adjacent high pressure
Churning pile body is mutually twisted and forms the grouting enhancement Layer parallel with road surface；Roadbed bearing pile top embedment grouting enhancement Layer one spacing
From；
S4: carry out embankment reparation and pavement construction.
3. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 2 based on malformation
It is, in described S1, carries out road surface dismounting, simultaneously road pavement initially with pavement milling machine or backhoe excavating machine vibration big gun head
Remove waste residue to clear.
4. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 2 based on malformation
Being, in described S2, roadbed bearing pile is in the plane in quincuncial arrangement；Front some campshed length is started identical from abutment, with
After shorten length the most successively；Roadbed bearing pile laterally uses unified stake long along road surface.
5. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 4 based on malformation
Being, described roadbed bearing pile uses two-way cement mixing pile, and its construction method is:
1) roadbed bearing pile location and pile foundation are in place；
2) cut soil sinking, whitewash: A) River Bank Stability: the serosity of two-way cement mixing pile uses 42.5 Portland cements to be solid
Agent, cement consumption is 65kg/m, the ratio of mud 0.50；During stirring mortar, should first add water, then by mixing cement, each mortar
Mixing time must not be less than 2min, is fully mixed thoroughly by cement mortar；Cement mortar is when aggregate bin poured into by mortar mixer, it is necessary to filter
Sieve, picks out cement lump；B) serosity conveying: cement mortar is delivered to two-way cement mixing pile machine by squeeze mortar pump press-in sebific duct
Drilling rod in, finally the grout outlet from interior drilling rod is injected in the soil body；C) cut soil sinking: start blender, make blender along guiding
Frame is to incision soil, and unlatching slurry pump is to soil body water-spray type slurry simultaneously, and during whitewashing, the pump pressure of slurry pump controls 0.25～0.4Mpa；
Two groups of the most forward and reverse circumgyration incisions of blade of two-way cement mixing pile machine, the stirring soil body, until projected depth, holding at the bottom of stake
Continuous whitewashing stirring was no less than 15 seconds；Lower inside and outside rod rotation speed >=50r/min when boring, drilling rod running speed control 0.5～
0.8m/min；
3) stirring promotes: A) closedown slurry pump, lifting blender, two groups of blade the most forward and reverse Stirring soil cements, until
Embankment upper surface；B) lifting process controls inside and outside rod rotation speed >=50r/min, drilling rod promote speed controlling 0.7～
1.0m/min；
4) stake machine moves to next position, repeats step 1)～3).
6. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 2 based on malformation
Being, arranges along road surface rectangular array in the design stake position of described single tube high-pressure rotary-spray method, each pile and its level and
Between the pile that vertical direction is adjacent, equal circumference is mutually embedding；Ram machine construction trend is for first laterally opening from the first stake position of side along road surface
Begin to construct one by one to opposite side, more reversely start to construct one by one to opposite side from the adjacent row of homonymy first stake position, constantly circulate.
7. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 6 based on malformation
Being, single tube high-pressure rotary-spray method forms specifically comprising the following steps that of grouting enhancement Layer
1) after rig is in place, pile foundation is carried out leveling, centering, adjust the perpendicularity of stake machine, it is ensured that drilling rod is consistent with stake position, deviation
Within 10mm, borehole perpendicularity error is less than 0.3%；
2) after drilling machine test running is normal, start to draw hole drill and enter；
3) creep into and draw hole to after projected depth, extract drilling rod, and change jet groutinl pipe and be inserted into projected depth；
4) after jet groutinl pipe inserts projected depth, slush pump, the most from bottom to top churning are connected；During injection, first should reach
Predetermined expulsion pressure, promotes churning pipe in slip casting after whitewashing, to prevent from twisting off churning pipe；For ensureing the quality at the bottom of stake, nozzle
When sinking to projected depth, rotate in situ to aperture grout normal after again churning promote；Rotation and the lifting of drilling rod should connect
Continue and carry out, must not interrupt；
5) when churning rises to grouting enhancement Layer elevation of top, stop the rotation shotcrete pipe, slowly promotes shotcrete pipe and goes out aperture, at this
During slurry pump continue slip casting in hole, it is ensured that more than enhancement Layer boring in be full of cement mortar；
6) according to design stake machine stake position and construction trend, make a machine move and construct to next stake position.
8. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 2 based on malformation
It is, during the construction of roadbed bearing pile, in roadbed bearing pile top mark height above embankment part, blender sinking and lifting process only
Stirring, not slip casting.
9. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 2 based on malformation
It is, designs grout hole in mixing pile stake position, after single tube high-pressure rotary-spray method completes grouting to grouting enhancement Layer, grouting is added
Strong layer above mixing pile machine disturbance embankment part carries out grouting and reinforcing.
10. the operation highway bridgehead vehicle jump method of disposal of control, its feature is coordinated as claimed in claim 2 based on malformation
It is, the boring that grouting enhancement Layer above embankment part is stayed when high-pressure grouting, after grouting enhancement Layer has been in the milk
During hoisting grouting pipe, boring is carried out without pressure grouting, in making boring, be full of cement mortar, form cement after solidification and fill
Body.
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| CN201610600895.1A CN106192650B (en) | 2016-07-27 | 2016-07-27 | Coordinate the operation highway bridgehead vehicle jump disposal structure and method of control based on malformation |
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| CN109723072A (en) * | 2018-12-10 | 2019-05-07 | 温州大学瓯江学院 | A kind of foundation structure preventing soft soil base sedimentation and its method |
| CN109722967A (en) * | 2018-12-10 | 2019-05-07 | 温州大学瓯江学院 | A kind of road structure preventing soft clay area highway bridgehead vehicle jump and its method |
| CN111576399A (en) * | 2020-04-20 | 2020-08-25 | 中铁建工集团有限公司 | Nail-shaped cement soil bidirectional mixing pile construction process |
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| CN112391890A (en) * | 2020-11-10 | 2021-02-23 | 桂林理工大学 | Construction device and method for solving bump at bridge head |
| CN113062161A (en) * | 2021-04-13 | 2021-07-02 | 金陵科技学院 | Pile top grouting pile bearing type embankment and construction method thereof |
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| CN115094698A (en) * | 2022-07-14 | 2022-09-23 | 宁波市城建设计研究院有限公司 | Solidified building residue soil road structure in soft soil area and construction method |
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| CN113062161A (en) * | 2021-04-13 | 2021-07-02 | 金陵科技学院 | Pile top grouting pile bearing type embankment and construction method thereof |
| CN113215892A (en) * | 2021-05-26 | 2021-08-06 | 金陵科技学院 | Grouting soil arch induced pile-supported embankment |
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