CN107012803A - High roadbed culvert off-load and the control method and structure for preventing creep - Google Patents
High roadbed culvert off-load and the control method and structure for preventing creep Download PDFInfo
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- CN107012803A CN107012803A CN201710403326.2A CN201710403326A CN107012803A CN 107012803 A CN107012803 A CN 107012803A CN 201710403326 A CN201710403326 A CN 201710403326A CN 107012803 A CN107012803 A CN 107012803A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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- Road Paving Structures (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The present invention relates to a kind of high roadbed culvert off-load and the control method and structure of creep are prevented, this method includes：1）In culvert both sides by related specifications requirement railway embankment to designed elevation；2）In step 1）Load reduction groove is excavated on the embankment formed, and bank protection processing is carried out to excavated off-load cell wall, load reduction groove and top of conduit are collectively forming off-load area；Off-load area is located at the surface of culvert；3）The airway tube with gas port is preset at the culvert arch springing in off-load area；4）Sand, tire debris are backfilled in off-load area and equipped with microorganism slurries and nutrient solution（The mixed solution of calcium salt and urea）Microorganism hardening slurry off-load bag, carry out grinding compacting processing；5）The remaining soil body of backfill is allowed to form overall as roadbed with soil at both sides to design height.The invention provides a kind of low cost, efficiency high, easy to operate and wide applicability high roadbed culvert off-load and prevent the control method and structure of creep.
Description
Technical field
The invention belongs to highway engineering technical field, it is related to a kind of high roadbed culvert off-load and prevents the control method of creep
And structure, more particularly to a kind of high roadbed culvert off-load based on microorganism hardening slurry and prevent the later stage from containing the control of body creep
Method and structure.
Background technology
The culvert of high filling section is higher due to the overlying depth of fill, and volume is larger, and filled load is big, and orographic condition is multiple
Miscellaneous, the stress and deformation characteristic of culvert are often complex, contain body there are problems that stress concentration and, easily draw
Various different degrees of diseases are played, have saying for " ten, which contain nine, splitting " in engineering circles.These diseases gently then cause culvert cracking, seepage or
Ponding, it is heavy then cause culvert structure to destroy, or even collapse, have a strong impact on the normal of road and use.
At present, the off-load measure to road high roadbed culvert is various, but there is the deficiency of several aspects, such as：Contain top to add
Muscle off-load effect is limited, contains top cracking phenomena and still has；Filling flexible material generally uses low-modulus material, due to its creep
Characteristic, long-time stability are not good, influence the stabilization of top pavement structure；The inside and outside earth pillar stiffness difference of culvert is not obvious, easily causes
Culvert stress asymmetry, cause culvert contain top with wall status from or cracking.
The content of the invention
In order to solve above-mentioned technical problem present in background technology, the invention provides a kind of low cost, efficiency high, easy
Operation and the wide high roadbed culvert off-load of applicability and prevent the control method of creep.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of high roadbed culvert off-load and prevent the control method of creep, it is characterised in that：Methods described includes following step
Suddenly：
1) in the both sides and top of newly-built culvert by related specifications requirement railway embankment to designed elevation；
2) load reduction groove is excavated at the top of newly-built culvert, and bank protection processing, load reduction groove are carried out to excavated off-load cell wall
And the bank protection carried on cell wall is collectively forming off-load area；The off-load area is located at the surface of culvert；
3) airway tube with gas port is preset at the culvert arch springing in off-load area；
4) sand, tire debris and microorganism hardening slurry off-load bag are backfilled in off-load area, is carried out at grinding compacting
Ensure that off-load bag is not crushed in reason, processing procedure；Be filled with the microorganism hardening slurry off-load bag microorganism slurries with
And nutrient solution, the microorganism slurries and nutrient solution are loaded in different microorganism hardening slurry off-load bags respectively；It is described
Nutrient solution is the mixed solution of calcium salt and urea；
5) the remaining soil body is backfilled to design height, makes the backfill above top of conduit and the left and right sides above top of conduit
The soil body forms overall as roadbed.
Preferably, the width of load reduction groove bottommost of the present invention and the width of culvert are identical, load reduction groove
Height be 1/20~1/30 of the depth of fill at the top of off-load area.
Preferably, microorganism hardening slurry off-load bag layered arrangement of the present invention is in off-load area.
Preferably, the equidistant layered arrangement of microorganism hardening slurry off-load bag of the present invention is in off-load area.
Preferably, the microorganism hardening slurry off-load bag of the present invention uses valve bag；Preferably, institute
Microorganism hardening slurry off-load bag is stated using No. 12 valve bags；As it is further preferred that microorganism hardening slurry off-load bag is used
No. 12 transparent plastic valve bags；The microorganism hardening slurry off-load bag includes the first valve bag and the second valve bag；It is described
Microorganism slurries are seated in the first valve bag；The nutrient solution is seated in the second valve bag；The second valve bag quantity
It is 2-5 times of the first valve bag quantity；First valve bag and the second valve bag mounted on top are arranged and form off-load bag
Layer；The quantity of the off-load bag layer is layer 2-4；The step 5) in off-load bag layer the remaining soil body of upper surface backfill to designing
Highly, microorganism hardening slurry off-load bag is in step 5) in all rupture；In off-load area (3), every layer of off-load bag layer
The laying area of middle microorganism hardening slurry off-load bag is not less than place aspect is accumulated 1/4.The size of No. 12 valve bags is 340mm
×450mm；The size of the tire debris is 50mm × 50mm-100mm × 100mm；The particle size range of the sand is 0.5-
2.5mm。
Preferably, microorganism slurries of the present invention are Pasteur's gemma sarcine slurries；Pasteur's gemma
The OD of sarcine slurries600Value is 1.4-2.0；The calcium salt is calcium acetate.
Preferably, the concentration of calcium salt is 0.1mol/L in nutrient solution of the present invention；Urea in the nutrient solution
Concentration be 0.1mol/L.Preferably, the diameter of airway tube of the present invention is 20mm~30mm；The gas port is passed through
It is through at the tube wall of airway tube；The airway tube is axially mutually parallel with culvert.
Preferably, airway tube of the present invention is steel pipe.
Preferably, culvert of the present invention is arch culvert or slab culvert.
A kind of high roadbed culvert off-load and prevent the structure of creep, it is characterised in that：The structure includes ground, off-load
Groove, culvert, airway tube and it is filled in banketing outside culvert；The load reduction groove and culvert are successively set on ground from top to bottom
On base；Bank protection is provided with the cell wall of the load reduction groove；The bank protection of the load reduction groove and load reduction groove is collectively forming off-load area；Make
To be preferred, the width of the load reduction groove bottommost and the width of culvert are identicals；The height of the load reduction groove is off-load area top
The 1/20~1/30 of portion's depth of fill；Preferably, the airway tube is placed in off-load area；Preferably, the off-load position
In the surface of culvert；Preferably, the airway tube is located at the surface of culvert and is arranged at the culvert arch springing in off-load area；
The gas port of airway tube is provided through on the airway tube；Sand, tire debris are backfilled in the off-load area and are filled with
The microorganism hardening slurry off-load bag of microorganism slurries and nutrient solution, the microorganism slurries and nutrient solution are loaded on not respectively
In same microorganism hardening slurry off-load bag；Preferably, the diameter of the airway tube is 20mm~30mm；Preferably, institute
Gas port is stated through the tube wall of airway tube；Preferably, the axial direction of the airway tube and culvert is mutually parallel；Preferably, institute
It is steel pipe to state airway tube；Preferably, the culvert is arch culvert or slab culvert.
It is an advantage of the invention that：
The invention provides a kind of high roadbed culvert off-load and prevent the control method and structure of creep, wherein control method
The combination for digging method and a variety of off-load methods afterwards using first filling out, off-load area lays tire debris, sand and is equipped with directly over culvert top
The microorganism hardening slurry off-load bag of microorganism slurries and nutrient solution (mixed solution of calcium salt and urea), is compacted using both sides
The difference banketed with middle part off-load area material modulus of compressibility, the differential settlement of artificially generated inside and outside earth pillar produces off-load arching,
Most of filled load is set to be transferred to culvert both sides, and along ground is transferred to, to alleviate the phenomenon for containing top stress concentration；In addition it is micro-
The reaction of biological and nutrient solution (mixed solution of calcium salt and urea) so that the flexible material in off-load area slowly solidifies, prevents
Only the later stage contains body creep, in case TERM DEFORMATION causes the destruction of top pavement structure.The present invention in top railway embankment filler, when
It is filled to after the plane above certain altitude of culvert top, excavates load reduction groove containing top plane, tire debris, sand are filled into load reduction groove,
And layered arrangement is equipped with microorganism slurries and nutrient solution (mixed solution of calcium salt and urea) microorganism hardening slurry off-load
Bag, forms local off-load area.And passage is laid in off-load area left and right sides bottom, relieving arch is formed containing top, and by subtracting
The off-load arching that bankets at the top of area is carried, top top embankment will be contained is transferred to culvert both sides and banket, so as to realize that reduction is contained
The effect of the suffered soil pressure in top, while after the flexible material on the culvert top that is pressurized produces certain sedimentation, the solidification of microorganism can
With the flexible material consolidation and sclerosis by top is contained, the deformation of creep in Han Ding off-loads area is effectively prevented, it is to avoid settlement after construction is to top road
The influence of face structure.After off-load method using the present invention, contain top soil pressure and be substantially reduced, efficiently solve culvert top cracking existing
As culvert top loading, which carries to banket by culvert both sides, is transferred to foundation soil, effectively reduces culvert stress caused by complicated landform not
Symmetry, simultaneously, it is to avoid the influence of excessive culvert top sedimentation road pavement structure, is that a kind of simple to operate, efficient, applicability is wide
High roadbed culvert off-load method.
Brief description of the drawings
Fig. 1 is the high roadbed culvert off-load of the invention provided and the diagrammatic cross-section for the control structure for preventing creep；
Fig. 2 is airway structure schematic diagram of the present invention；
Description of reference numerals is as follows：
1- bankets；2- culverts；3- off-loads area；4- bank protections；5- airway tubes；6- grounds；7- gas ports.
Embodiment
Referring to Fig. 1, the invention provides a kind of high roadbed culvert off-load and the control method of creep is prevented, this method includes
Following steps：
1) in the both sides and top of newly-built culvert 2 by related specifications requirement railway embankment to designed elevation；
2) load reduction groove is excavated at the top of newly-built culvert (2), and bank protection processing, off-load are carried out to excavated off-load cell wall
Groove and the bank protection 4 carried on cell wall are collectively forming off-load area 3；Off-load area 3 is located at the surface of culvert 2；
3) airway tube 5 with gas port 7 is preset at the arch springing of culvert 2 in off-load area 3；
4) sand, tire debris are backfilled in off-load area 3 and equipped with microorganism slurries and nutrient solution (calcium salt and urea
The mixed solution of mixing) microorganism hardening slurry off-load bag (microorganism slurries and nutrient solution are loaded on different micro- respectively
In biological curing slurries off-load bag), carry out ensureing that off-load bag is not crushed in grinding compacting processing, processing procedure；
5) the remaining soil body is backfilled to design height, backfill above culvert top is formed whole with containing the top top left and right sides soil body
Body is used as roadbed.
The width of load reduction groove bottommost is identical with the width of culvert 2, and the height of load reduction groove is that the top of off-load area 3 is banketed
The 1/20~1/30 of height.
Microorganism hardening slurry off-load bag point equipped with microorganism slurries and nutrient solution (mixed solution of calcium salt and urea)
Floor and it is equally spaced in off-load area 3, microorganism slurries and nutrient solution are loaded on different microorganism hardening slurries respectively
In off-load bag；Wherein, microorganism hardening slurry off-load bag uses valve bag；Preferably, microorganism hardening slurry off-load bag is adopted
With No. 12 valve bags；As it is further preferred that microorganism hardening slurry off-load bag is using No. 12 transparent plastic valve bags；Microorganism solidifies
Slurries off-load bag includes the first valve bag and the second valve bag；Microorganism slurries are seated in the first valve bag；Nutrient solution is filled
Fill out in the second valve bag；The quantity of second valve bag is 2-5 times of the quantity of the first valve bag；First valve bag and second
Valve bag mounted on top is arranged and forms off-load bag layer；The quantity of off-load bag layer is layer 2-4；Step 5) in off-load bag layer it is upper
The surface remaining soil body of backfill is to design height, and the microorganism hardening slurry off-load bag is in step 5) in all rupture；Off-load area
(3) in, the laying area of microorganism hardening slurry off-load bag is not less than place aspect is accumulated 1/4 in every layer of off-load bag layer；
The size of tire debris is between 50mm × 50mm-100mm × 100mm；The particle size range of sand is 0.5-2.5mm.The present invention
The mechanism of action using microorganism hardening slurry off-load bag is：Sand, tire debris and microorganism hardening slurry off-load bag are certainly
It is laid in successively in off-load area on down, then toward the plain soil of top top backfill is contained, as backfill highly increases, microorganism is solid
Slurrying liquid off-load bag is damaged by the extruding of top gravity or external pressure, and the microorganism in microorganism hardening slurry off-load bag is consolidated
Slurrying hydrorrhea goes out, and starts after being contacted with the sand and tire debris in off-load area and gradually reaction, until off-load is fully cured
Area.
Microorganism slurries in microorganism hardening slurry off-load bag are the OD of Pasteur's gemma sarcine slurries600Average value
It is 1.8；Calcium salt in microorganism hardening slurry off-load bag is calcium acetate.Microorganism is starched and calcium salt is imitated with the solidification that nutrient solution is acted on
Fruit reaches preliminary cementing in 24h, and 20d~30d reaches more than 75% compression strength requirement；Wherein, nutrient solution be by calcium salt with
The mixed solution of urea；The concentration of calcium salt is 0.1mol/L in nutrient solution；The concentration of urea is 0.1mol/L in nutrient solution.
The diameter of airway tube 5 is 20mm~30mm；Tube wall of the gas port 7 through airway tube 5；Airway tube 5 and culvert 2
It is axially mutually parallel；Airway tube 5 is steel pipe.Culvert 2 is arch culvert or slab culvert.
The present invention additionally provides one kind while providing a kind of high roadbed culvert off-load and preventing the control method of creep
High roadbed culvert off-load and the structure for preventing creep, the structure include ground 6, load reduction groove, culvert 2, airway tube 5 and are filled in
1 is banketed outside culvert 2；Load reduction groove and culvert 2 are successively set on ground 6 from top to bottom；Set on the cell wall of load reduction groove
There is bank protection 4；The bank protection 4 of load reduction groove and load reduction groove is collectively forming off-load area 3；Preferably, the width of load reduction groove bottommost with
The width of culvert 2 is identical；The height of load reduction groove is that the top of off-load area 3 bankets the 1/20~1/30 of 1 height；Preferably,
Airway tube 5 is placed in off-load area 3；Preferably, off-load area 3 is located at the surface of culvert 2；Contain preferably, airway tube 5 is located at
The surface in hole 2 and it is arranged at the arch springing of culvert 2 in off-load area 3；The gas port 7 of airway tube 5 is provided through on airway tube 5；
Sand, tire debris are backfilled in off-load area 3 and the microorganism hardening slurry off-load bag of microorganism slurries and nutrient solution is filled with,
Microorganism slurries and nutrient solution are loaded in different microorganism hardening slurry off-load bags respectively；Preferably, airway tube 5
Diameter is 20mm~30mm；Preferably, tube wall of the gas port 7 through airway tube 5；Preferably, airway tube 5 and culvert 2
Axially it is mutually parallel；Preferably, airway tube 5 is steel pipe；Preferably, culvert 2 is arch culvert or slab culvert.
The present invention is described in detail with reference to the accompanying drawings and detailed description：
The off-load culvert method is dug method and combined with flexible filler method afterwards first to fill out, and culvert embankment is filled first to designing mark
Height, load reduction groove is excavated at the top of culvert, and bank protection processing is carried out again, and a diameter of 30mm steel pipes air guide is filled at culvert arch springing
Pipe, load reduction groove and the bank protection carried on cell wall are collectively forming off-load area, then in off-load area backfill sand, the tire of top of conduit
It is filled with respectively in fragment and the microorganism hardening slurry off-load bag being laid in off-load area, microorganism hardening slurry off-load bag
(microorganism hardening slurry off-load bag is damaged when by the extruding of stronger external force or gravity extruding, micro- for microorganism slurries and nutrient solution
Microorganism hardening slurry in biological curing slurries off-load bag overflows, after being contacted with the sand and tire debris in off-load area simultaneously
Gradually start reaction, until off-load area is fully cured, microorganism slurries and nutrient solution are loaded on different microorganisms and consolidated respectively
In slurrying liquid off-load bag), meanwhile, carry out ensureing that off-load bag is not crushed in grinding compacting processing, processing procedure in off-load area, return
The remaining soil body is filled out to design height, backfill above culvert top is formed overall as roadbed with containing the top top left and right sides soil body
(the microorganism hardening slurry off-load bag all ruptures in backfilling process), the width of load reduction groove is equal with culvert, load reduction groove
Height be 1/30 of the depth of fill at the top of off-load area, wherein microorganism slurry and calcium salt respectively from Pasteur's gemma sarcine with
And calcium acetate (Ca (CH3COO)2), it is easier to occur consolidation effect；Tentatively consolidated after off-load material after 24h, 20d~30d reaches
More than 75% compression strength requirement, and the gas that microorganism slurry is produced with calcium salt is arranged outside embankment by airway tube, is used after 7 days
Consolidation effect is examined in static load test, and power to be lifted is met after design requirement, carries out building for top highway.
According to Fig. 1, the present invention is analyzed from load transfer mechanism：When embankment loading is in 3 top of off-load area, due to
Flexible material in off-load area 3 progressively compresses with loose fill, causes the larger difference of off-load area 3 and both sides embankment filled soil to be sunk
Drop.The relative settlement makes top embankment filled soil produce soil arching effect, part embankment is transferred to culvert both sides and bankets, and passes
Ground 6 is handed to, from the load of culvert 2 is substantially reduced, the solidification of the microorganism slurry and calcium salt in off-load area 3 in addition is made
With can effectively prevent the later stage due to the creep of tire debris and sand in off-load area 3, cause the unbalance stress for containing body to cause knot
The destruction of structure.
The off-load method of the present embodiment is applied to the high roadbed culvert of 12.0m at certain super expressway one, culvert is arch culvert,
High 2.5m.Culvert bottom ground is gravelly soil, and stabilization zone ground reaches ground top surface absolute altitude.And in the culvert at similar stratum one
14.8m same type high roadbed culvert carries out off-load processing using existing reinforcement off-load method, and two kinds of operating modes are carried out respectively
Monitor comparative analysis.Monitoring result shows, compared with existing reinforcement off-load method, contains top soil pressure using the off-load method of the present invention
Power reduces more than 30%, and the amplitude of variation of soil pressure is significantly less than existing reinforcement off-load method operating mode.
Claims (10)
1. a kind of high roadbed culvert off-load and prevent the control method of creep, it is characterised in that：It the described method comprises the following steps：
1）In newly-built culvert（2）Both sides and top by related specifications requirement railway embankment to designed elevation；
2）In newly-built culvert（2）Top excavate load reduction groove, and to excavated off-load cell wall progress bank protection processing, load reduction groove with
And the bank protection on load cell wall（4）It is collectively forming off-load area（3）；The off-load area（3）Positioned at culvert（2）Surface；
3）In off-load area（3）Culvert（2）Band gas port is preset at arch springing（7）Airway tube（5）；
4）In off-load area（3）Middle backfill sand, tire debris and microorganism hardening slurry off-load bag, are carried out at grinding compacting
Ensure that off-load bag is not crushed in reason, processing procedure；Be filled with the microorganism hardening slurry off-load bag microorganism slurries with
And nutrient solution, the microorganism slurries and nutrient solution are loaded in different microorganism hardening slurry off-load bags respectively；It is described
Nutrient solution is the mixed solution of calcium salt and urea；
5）The remaining soil body of backfill makes culvert to design height（2）The backfill and culvert of over top（2）Over top or so two
The side soil body forms overall as roadbed.
2. high roadbed culvert off-load according to claim 1 and prevent the control method of creep, it is characterised in that：It is described to subtract
Carry the width and culvert of groove bottommost（2）Width be identical, the height of the load reduction groove is off-load area（3）Banket height at top
The 1/20 ~ 1/30 of degree.
3. high roadbed culvert off-load according to claim 2 and prevent the control method of creep, it is characterised in that：It is described micro-
Biological curing slurries off-load bag layered arrangement is in off-load area（3）In；Preferably, between the microorganism hardening slurry off-load bag is waited
Away from layered arrangement in off-load area（3）In.
4. high roadbed culvert off-load according to claim 1 or 2 or 3 and prevent the control method of creep, it is characterised in that：
The microorganism hardening slurry off-load bag uses valve bag；Preferably, the microorganism hardening slurry off-load bag uses No. 12
Valve bag；As it is further preferred that microorganism hardening slurry off-load bag is using No. 12 transparent plastic valve bags；The microorganism is consolidated
Slurrying liquid off-load bag includes the first valve bag and the second valve bag；The microorganism slurries are seated in the first valve bag；Institute
Nutrient solution is stated to be seated in the second valve bag；The second valve bag quantity is 2-5 times of the first valve bag quantity；Described first
Valve bag and the second valve bag mounted on top are arranged and form off-load bag layer；The quantity of the off-load bag layer is layer 2-4；It is described
Step 5）In off-load bag layer the upper surface remaining soil body of backfill to design height, the microorganism hardening slurry off-load bag is in step
Rapid 5）Middle all ruptures；Off-load area（3）In, the laying area of microorganism hardening slurry off-load bag is not in every layer of off-load bag layer
1/4 accumulated less than place aspect.
5. high roadbed culvert off-load according to claim 4 and prevent the control method of creep, it is characterised in that：It is described micro-
Biological slurries are Pasteur's gemma sarcine slurries；The OD of Pasteur's gemma sarcine slurries600Value is 1.4-2.0；It is described
Calcium salt is calcium acetate.
6. high roadbed culvert off-load according to claims 5 and prevent the control method of creep, it is characterised in that：Institute
The concentration for stating calcium salt in nutrient solution is 0.1mol/L；The concentration of urea is 0.1mol/L in the nutrient solution.
7. high roadbed culvert off-load according to claim 6 and prevent the control method of creep, it is characterised in that：It is described to lead
Tracheae（5）Diameter be 20mm ~ 30mm；The gas port（7）Through airway tube（5）Tube wall；The airway tube（5）With culvert
Hole（2）Axially it is mutually parallel.
8. high roadbed culvert off-load according to claim 7 and prevent the control method of creep, it is characterised in that：It is described to lead
Tracheae（5）It is steel pipe.
9. high roadbed culvert off-load according to claim 8 and prevent the control method of creep, it is characterised in that：It is described to contain
Hole（2）It is arch culvert or slab culvert.
10. a kind of high roadbed culvert off-load and prevent the structure of creep, it is characterised in that：The structure includes ground（6）, off-load
Groove, culvert（2）, airway tube（5）And it is filled in culvert（2）Outside bankets（1）；The load reduction groove and culvert（2）From upper
And under be successively set on ground（6）On；Bank protection is provided with the cell wall of the load reduction groove（4）；The load reduction groove and load reduction groove
Bank protection（4）It is collectively forming off-load area（3）；Preferably, the width and culvert of the load reduction groove bottommost（2）Width be phase
With；The height of the load reduction groove is off-load area（3）Banket at top（1）The 1/20 ~ 1/30 of height；Preferably, the air guide
Pipe（5）It is placed in off-load area（3）In；Preferably, the off-load area（3）Positioned at culvert（2）Surface；Preferably, described
Airway tube（5）Positioned at culvert（2）Surface and be arranged on off-load area（3）Culvert（2）At arch springing；The airway tube（5）On
It is provided through airway tube（5）Gas port（7）；The off-load area（3）It is middle to backfill sand, tire debris and be filled with micro- life
The microorganism hardening slurry off-load bag of thing slurries and nutrient solution, the microorganism slurries and nutrient solution are loaded on different respectively
In microorganism hardening slurry off-load bag；Preferably, the airway tube（5）Diameter be 20mm ~ 30mm；Preferably, described
Gas port（7）Through airway tube（5）Tube wall；Preferably, the airway tube（5）With culvert（2）Axially it is mutually parallel；Make
For preferred, the airway tube（5）It is steel pipe；Preferably, the culvert（2）It is arch culvert or slab culvert.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710403326.2A CN107012803B (en) | 2017-06-01 | 2017-06-01 | Control method and structure for load shedding and creep prevention of high-fill culvert |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403326.2A CN107012803B (en) | 2017-06-01 | 2017-06-01 | Control method and structure for load shedding and creep prevention of high-fill culvert |
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| CN107012803A true CN107012803A (en) | 2017-08-04 |
| CN107012803B CN107012803B (en) | 2022-07-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108086176A (en) * | 2017-12-04 | 2018-05-29 | 中国电建集团中南勘测设计研究院有限公司 | A kind of box culvert backfill structure and earth-filling method |
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| Publication number | Publication date |
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| CN107012803B (en) | 2022-07-29 |
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