CN106917331A - The road structure and its construction method of a kind of deep-lying karst area water sealing consolidation - Google Patents
The road structure and its construction method of a kind of deep-lying karst area water sealing consolidation Download PDFInfo
- Publication number
- CN106917331A CN106917331A CN201710259214.4A CN201710259214A CN106917331A CN 106917331 A CN106917331 A CN 106917331A CN 201710259214 A CN201710259214 A CN 201710259214A CN 106917331 A CN106917331 A CN 106917331A
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- China
- Prior art keywords
- slurries
- solution cavity
- road structure
- lying
- deep
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Classifications
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/34—Foundations for sinking or earthquake territories
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Hydrology & Water Resources (AREA)
- Architecture (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of road structure of deep-lying karst area water sealing consolidation, it mainly includes：Roadbed (1), concrete cast-in-place slab (2), drilling (3), slurries radiation area (4), current (5), prestressing force longeron (6), solution cavity (7), isolated footing (8), prestressed cross beams (9), Grouting Pipe (12), slurries radiating aperture (13)；The present invention is first isolated current (5) with solution cavity (7) by slurries radiation area (4) using curtain grouting technology, to prevent the development of solution cavity；Then in solution cavity (7) top roadbed region using prestressing force longeron (6), prestressed cross beams (9) for the pressure that supports roadbed (1) to be applied on concrete cast-in-place slab (2), while by isolated footing (8) for prestressed girder provides support force；The present invention can effectively punish large-scale solution cavity of the depth more than 10m, while current can effectively be separated, prevent the development of solution cavity, it is ensured that the stability of road structure, and simple, economic and reliable of constructing, and have broad application prospects.
Description
Technical field
The present invention relates to the road engineering technical field in civil engineering, particularly with regard to a kind of deep-lying karst area sealing
The road structure and its construction method of reinforcing.
Background technology
In road project, some karst regions are inevitably passed through, solution cavity is one of karst region most typically harm,
Construction to road causes serious threat；Collapsing for solution cavity will cause property to damage to engineering that is built or building
Lose, or even injure personal safety, huge negative effect is caused to society, karst collapse has become karst area mainly pacifies
One of full hidden danger.The formation of solution cavity is the result that is formed of erosion of the water received for a long time by limestone, and limestone is in water and titanium dioxide
Calcium bicarbonate is generated in the presence of carbon soluble in water, then solution cavity forms and constantly develops and expand.Traditional solution cavity administers skill
Art mainly has：Slip casting, rockfill, pile foundation etc., slurry injection technique is only applicable to small-sized solution cavity, and slip casting expense is carried out to large-scale solution cavity
Costliness, and technical operation is complicated；The Treating technology that rockfills is only applicable to shallow solution cavity, and for deeper solution cavity, digging process is cumbersome,
And workload is huge, and certain destruction is caused to local environment；Pile foundation as a kind of conventional punishment solution cavity technology,
Its technical requirements is higher, and pile foundation position can not efficiently be laid, while the continuous erosion with current to solution cavity,
The development of solution cavity certainly will be caused to expand, original pile foundation can not effectively maintain the long-time stability of road structure.
The content of the invention
For problem above, road structure and its construction the invention discloses a kind of deep-lying karst area water sealing consolidation
Method：The road structure mainly include roadbed (1), concrete cast-in-place slab (2), drilling (3), slurries radiation area (4), current (5),
Prestressing force longeron (6), solution cavity (7), isolated footing (8), prestressed cross beams (9), Grouting Pipe (12), slurries radiating aperture (13)；Its
In, described prestressed cross beams (9) and prestressing force longeron (6) are interlaced, in sphere of movements for the elephants shape lay, prestressed girder two ends with
Isolated footing (8) is connected；Concrete cast-in-place slab (2) is between prestressed girder and roadbed (1).
The road structure and its construction method of a kind of described deep-lying karst area water sealing consolidation, it is characterised in that institute
The drilling (3) stated is sprayed by slurries radiating aperture (13) from Grouting Pipe (12) between current (5) and solution cavity (7) to surrounding
Slip casting forms slurries radiation area (4).
The road structure and its construction method of a kind of described deep-lying karst area water sealing consolidation, it is characterised in that institute
The concrete strength that the concrete cast-in-place slab (2) and prestressed girder and isolated footing (8) stated are used is C30, described drilling
(3) diameter D=100mm, Grouting Pipe (12) diameter D=30mm, slurries radiation area (13) radius R=1.5m, the slip casting of use is initially pressed
Power is 1 ~ 3MPa, and final grouting pressure is 6 ~ 8MPa.
The road structure and its construction method of a kind of described deep-lying karst area water sealing consolidation, it is characterised in that institute
The curtain-grouting material stated uses Portland cement list slurries, double slurries and chemical pulp, is aided with superfine cement and waterglass
Double slurries, ratio of mud W:C=0.6:1~0.8:1, while adding a certain amount of additive（Waterproofing agent, accelerator, swelling agent etc.）,
According to the performance requirement under different condition, the various performance indications of slurries are adjusted.
Beneficial effect of the present invention：The steady in a long-term of road structure can not only effectively be ensured using above road structure
Property, and the development again of solution cavity can also be prevented, release threat of the solution cavity to road project；Present invention use plate-beam-
Isolated footing is structure as a whole, and the power that road surface is applied to roadbed is dexterously disperseed to give each isolated footing, it is ensured that solution cavity is not
Disturbed by external force；Prestressing force longeron and prestressed cross beams intersect, the pressure that common support cast in place concrete plate applies, and
And use prestressed girder simple structure, material-saving to install simple；The present invention is noted between current and solution cavity using curtain simultaneously
Slurry technology, erosion of the cut-off current to solution cavity, has saved grouting cost and working procedure；Can efficiently, accurately administer karst
The harm in area.
Brief description of the drawings
Fig. 1 is the road structure schematic diagram of specific implementation process of the present invention
Fig. 2 is the plan of road structure of the present invention
Fig. 3 is slip casting procedure structure schematic diagram of the present invention
Fig. 4 is bored grouting process chart of the present invention
Description of reference numerals：1. roadbed, 2. concrete cast-in-place slab, 3. drilling, 4. slurries radiation area, 5. current, 6. in advance should
Power longeron, 7. solution cavity, 8. isolated footing, 9. prestressed cross beams, 10. steel pipe, 11. sandstones, 12. Grouting Pipes, 13. slurries
Radiating aperture.
Specific embodiment
Road structure of the present invention and implementation steps are described further below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of road structure of deep-lying karst area water sealing consolidation of the invention and its construction
Method, the road structure include roadbed (1), concrete cast-in-place slab (2), drilling (3), slurries radiation area (4), current (5), in advance should
Power longeron (6), solution cavity (7), isolated footing (8), prestressed cross beams (9), steel pipe (10), sandstone (11), Grouting Pipe (12), slurries
Radiating aperture (13)；Wherein described prestressed cross beams (9) and prestressing force longeron (6) are interlaced, are laid in sphere of movements for the elephants shape, in advance should
Casting concrete Bars In Poured Concrete Slab (2) above power beam, by isolated footing (8) for prestressed girder provides holding power；In Grouting Pipe (12)
Slurries are sprayed by slurries radiating aperture (13) to surrounding, form slurries radiating aperture (13)；Described curtain grouting technology uses Fig. 4
Grouting process.
Or the 1st, in road construction project Road Detection project, first using high-density electric, geological radar technology, hole
The advanced detection techniques such as interior acoustic CT technology, determine the particular location and size of solution cavity (7), while determining the position of current (5)
And flow direction.
2nd, after determining the particular location of solution cavity (7) and current (5), using curtain grouting technology in current (5) and solution cavity (7)
Between drilled (3), drilling (3) in Grouting Pipe (12) by slurry material by slurries radiating aperture (13) to surrounding spray,
Form slurries radiation area (4), isolation current (5).
3rd, the bored grouting equipment that uses as shown in figure 3, grouting process is as shown in figure 4, slip casting initial pressure is 1 ~ 3MPa,
Final grouting pressure is 6 ~ 8MPa, first note single liquid cement mortar, afterwards note dual slurry, whole process work as slip casting through using chemical pulp, if
When effect is not up to actual requirement, supplement slip casting should be carried out to its region, reach anti-, draining requirement.
4th, cleaning solution cavity (7) top roadbed (1) region, and flattened, be compacted, lay prestressed cross beams (9) and in advance should
Power longeron (6) so that prestressed girder is interlaced, is laid in sphere of movements for the elephants shape, and at prestressed girder two ends, depth below is buried
Isolated footing (8), prestressed cross beams (9) and prestressing force longeron (6) are connected with each other with basic (8).
5th, prestressed material marched into the arena first, resetted, counterdie is installed in the advance position laid, according to the spy of component load-bearing
Point assembling reinforcement, and bellows is installed, prestressed cross beams (9) reinforcing bar and longeron (6) reinforcing bar are interlaced, in sphere of movements for the elephants shape cloth
If then, longeron horizontal to prestressing force together carries out casting concrete, and is conserved, and prestressed stretch-draw is finally carried out, before tensioning
Carry out anchorage inspection, equipment calibration and check concrete quality, after the completion of prestressed stretch-draw, slurry seal, sealing off and covering anchorage are carried out to duct.
6 and then concrete cast-in-place slab (2) is laid on prestressed cross beams (9) and prestressing force longeron (6) top, and to coagulation
Native Bars In Poured Concrete Slab (2) carries out maintenance treatment, illustrates that part is not prior art known to those skilled in the art in detail herein.
Claims (4)
1. the road structure and its construction method of a kind of deep-lying karst area water sealing consolidation, it is characterised in that the road structure
Mainly include：Roadbed (1), concrete cast-in-place slab (2), drilling (3), slurries radiation area (4), current (5), prestressing force longeron (6),
Solution cavity (7), isolated footing (8), prestressed cross beams (9), Grouting Pipe (12), slurries radiating aperture (13)；Wherein, described prestressing force
Crossbeam (9) and prestressing force longeron (6) are interlaced, in sphere of movements for the elephants shape lay, prestressed girder two ends with isolated footing (8) phase
Even；Concrete cast-in-place slab (2) is between prestressed girder and roadbed (1).
2. the road structure and its construction method of a kind of deep-lying karst area according to claim 1 water sealing consolidation, its
Be characterised by, described drilling (3) between current (5) and solution cavity (7), by Grouting Pipe (12) by slurries radiating aperture (13)
Slurries radiation area (4) are formed to surrounding jet groutinl.
3. the road structure and its construction method of a kind of deep-lying karst area according to claim 1 water sealing consolidation, its
It is characterised by, the concrete strength that described concrete cast-in-place slab (2) and prestressed girder and isolated footing (8) are used is C30,
Drilling (3) diameter D=100mm of use, Grouting Pipe (12) diameter D=30mm, slurries radiation area (13) radius R=1.5m, use
Slip casting initial pressure is 1 ~ 3MPa, and final grouting pressure is 6 ~ 8MPa.
4. the road structure and its construction method of a kind of deep-lying karst area according to claim 1 water sealing consolidation, its
It is characterised by, described curtain-grouting material uses Portland cement list slurries, double slurries and chemical pulp, is aided with ultra-fine water
Mud and the double slurries of waterglass, ratio of mud W:C=0.6:1~0.8:1, while adding a certain amount of additive（Waterproofing agent, accelerator,
Swelling agent etc.）, according to the performance requirement under different condition, adjust the various performance indications of slurries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259214.4A CN106917331B (en) | 2017-04-20 | 2017-04-20 | Water-stopping reinforced roadbed structure for deep-buried karst region and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259214.4A CN106917331B (en) | 2017-04-20 | 2017-04-20 | Water-stopping reinforced roadbed structure for deep-buried karst region and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106917331A true CN106917331A (en) | 2017-07-04 |
| CN106917331B CN106917331B (en) | 2020-04-07 |
Family
ID=59568147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710259214.4A Expired - Fee Related CN106917331B (en) | 2017-04-20 | 2017-04-20 | Water-stopping reinforced roadbed structure for deep-buried karst region and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106917331B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166471A (en) * | 2017-12-28 | 2018-06-15 | 中建六局土木工程有限公司 | A kind of complicated geological converts beam construction method |
| CN112982051A (en) * | 2021-02-20 | 2021-06-18 | 温俊魁 | Roadbed suitable for karst landform and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080382A (en) * | 2010-11-30 | 2011-06-01 | 济南大学 | Building foundation adaptable to goaf foundation deformation |
| CN202247575U (en) * | 2011-09-09 | 2012-05-30 | 中铁二院工程集团有限责任公司 | Structure for strengthening roadbed in high-speed railway station turnout area with highly developed karst |
| CN105696427A (en) * | 2016-04-06 | 2016-06-22 | 中铁第四勘察设计院集团有限公司 | Construction method for reinforcing newly-built railway karst foundation and roadbed structure thereof |
| CN206736650U (en) * | 2017-04-20 | 2017-12-12 | 长沙理工大学 | A kind of road structure of deep-lying karst area water sealing consolidation |
-
2017
- 2017-04-20 CN CN201710259214.4A patent/CN106917331B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080382A (en) * | 2010-11-30 | 2011-06-01 | 济南大学 | Building foundation adaptable to goaf foundation deformation |
| CN202247575U (en) * | 2011-09-09 | 2012-05-30 | 中铁二院工程集团有限责任公司 | Structure for strengthening roadbed in high-speed railway station turnout area with highly developed karst |
| CN105696427A (en) * | 2016-04-06 | 2016-06-22 | 中铁第四勘察设计院集团有限公司 | Construction method for reinforcing newly-built railway karst foundation and roadbed structure thereof |
| CN206736650U (en) * | 2017-04-20 | 2017-12-12 | 长沙理工大学 | A kind of road structure of deep-lying karst area water sealing consolidation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166471A (en) * | 2017-12-28 | 2018-06-15 | 中建六局土木工程有限公司 | A kind of complicated geological converts beam construction method |
| CN108166471B (en) * | 2017-12-28 | 2019-12-27 | 中建六局土木工程有限公司 | Construction method of complicated geological transfer beam |
| CN112982051A (en) * | 2021-02-20 | 2021-06-18 | 温俊魁 | Roadbed suitable for karst landform and construction method |
| CN112982051B (en) * | 2021-02-20 | 2024-04-26 | 温俊魁 | Roadbed suitable for karst landform and construction method |
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| Publication number | Publication date |
|---|---|
| CN106917331B (en) | 2020-04-07 |
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