CN202595591U - Micro steel pipe pile network structure for tunnel cavern roadbed in karst region - Google Patents
Micro steel pipe pile network structure for tunnel cavern roadbed in karst region Download PDFInfo
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- CN202595591U CN202595591U CN 201220212280 CN201220212280U CN202595591U CN 202595591 U CN202595591 U CN 202595591U CN 201220212280 CN201220212280 CN 201220212280 CN 201220212280 U CN201220212280 U CN 201220212280U CN 202595591 U CN202595591 U CN 202595591U
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Abstract
The utility model discloses a micro steel pipe pile network structure for a tunnel cavern roadbed in a karst region. A concrete layer is arranged on the lower part of a tunnel structure, a broken stone cushion layer is arranged on the lower part of the concrete layer, and a geogrid is arranged in the middle of the broken stone cushion layer; and a cavern treatment section and a bedrock are positioned below the broken stone cushion layer, and karst grouting is carried out at the joint of the bottom of the cavern treatment section and the bedrock. The structure is characterized in that micro steel pipe piles are arranged on the cavern treatment section below the broken stone cushion layer based on karst grouting, a steel bar is arranged in each micro steel pipe pile, and concrete is filled into each micro steel pipe pile. The structure effectively meets the requirement of a building load for the bearing capacity of a composite foundation, the requirement for deformation compatibility of the piles and soil between the piles and the requirement for treatment of the foundation under environmental conditions, and high economic, technical, environmental and social benefits can be obtained.
Description
Technical field
The utility model belongs to the karst area tunnel and dissolves chamber subgrade Design construction field, is specifically related to a kind of miniature steel pipe pile stake web frame that the karst area tunnel dissolves the chamber roadbed that is used for.
Technical background
Since the reform and opening-up, China railways is flourish, and the railway transport of passengers freight demand gets into the quick rise period, along with improving constantly of living standards of the people, the requirement of railway transportation service quality is improved constantly.China is vast in territory, can run into the geologic structure of a lot of complicacies in the process of the construction of the very long railway line of China, and it is the important means that guarantees railway operation safety that the means of utilization science solve the problem that the construction of railways process occurs.
During construction of railways, railway tunnel is passed through empty processing mode of dissolving chamber karst roadbed has modes such as leap (beam, plate, pile foundation support table), backfill.The molten chamber of the sky that railway tunnel meets with is generally larger, and the processing mode of pile foundation support table is feasible, but general cost is higher, and beam, plated construction are through dissolving the chamber, and technology is difficult to realize.Big cavity top excavation generally can be abandoned quarrel (piece stone, shiver stone) to bottom molten chamber employing and carry out the backfill processing, has often strengthened intractability.Especially when railway tunnel >=3km; Need to adopt non-fragment orbit, sedimentation need be controlled at below the 2cm, the chamber treatment technology is dissolved in substrate require suitable height; The method for processing foundation of conventional steel pipe pile; Stake and soil between pile deformation inaccurate coordination can't satisfy the requirement of settlement control of non-fragment orbit, more are difficult to guarantee the stability of bedding under the long-time running effect.
Summary of the invention
The purpose of the utility model provides a kind of miniature steel pipe pile stake web frame that the karst area tunnel dissolves the chamber roadbed that is used for; Solve conventional method for processing foundation and be difficult to satisfy that stake, soil between pile deformation are coordinated and requirement of settlement control, guaranteed stable and traffic safety, the comfortableness of roadbed.
For realizing above-mentioned purpose; A kind of miniature steel pipe pile stake web frame that is used for molten chamber, karst area tunnel roadbed that the utility model provides; Comprise that the tunnel structure bottom is provided with layer of concrete, the layer of concrete bottom is provided with hardcore bed, and this also is provided with GSZ in the middle of being provided with hardcore bed.This hardcore bed lower floor is for dissolving chamber processing section and basement rock; Dissolve processing section bottom, chamber and carry out karst slip casting with the basement rock junction; It is characterized in that; Molten chamber substrate from hardcore bed lower floor on karst slip casting basis is provided with miniature steel pipe pile, also is provided with reinforcing bar in this every miniature steel pipe pile and is filled with concrete.
Preferably, said bar diameter is 10 ~ 16mm, and this reinforcing bar stretches into hardcore bed 0.2 ~ 0.4m.
Preferably, said miniature steel pipe pile stretches into and gos deep into basement rock 1.0 ~ 2m, and said karst injected hole gos deep into basement rock 5 ~ 8m.
Preferably, said miniature steel pipe pile stake directly is 100 ~ 120mm.
Preferably, said miniature steel pipe pile road along the line longitudinal pitch 1 ~ 2m, miniature steel pipe pile road along the line horizontal spacing 1 ~ 2m, said karst injected hole road along the line longitudinal pitch 4 ~ 7m, karst injected hole horizontal spacing 4 ~ 7m carries out karst slip casting.
The utility model usefulness: the utility model proposes to be used for the miniature steel pipe pile stake web frame that the karst area tunnel dissolves the chamber roadbed.Utilize karst slip casting and steel pipe pile to go deep in the basement rock jointly, and in steel pipe pile mounting reinforcing steel bars and fill concrete, this reinforcing bar stretches in the hardcore bed.Can improve stake and soil between pile deformation harmony; And settlement after construction≤2cm; Satisfy the requirement of non-fragment orbit in the lava, can effectively satisfy building load to the requirement of Bearing Capacity of Composite Foundation, distortion satisfy standard to the requirement of structure foundation distortion or satisfy design to the specific (special) requirements of building deformation, satisfy ambient conditions to the ground treatment requirement.Can dissolve extensive use in the karst roadbed of chamber in Karst Tunnel, can obtain good economy, technology, environment and social benefit.
Description of drawings
Fig. 1 dissolves the miniature steel pipe pile stake web frame sketch map of chamber roadbed for the karst area tunnel;
Fig. 2 is for dissolving the structural representation of chamber processing section miniature steel pipe pile;
Fig. 3 is for dissolving the floor map sketch map of chamber processing section grouting and reinforcing;
Among the figure, tunnel structure 1, layer of concrete 2, hardcore bed 3, GSZ 4,
Karst injected hole 5, miniature steel pipe pile 6, reinforcing bar 7, molten chamber processing section 8, basement rock 9.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model sealing karst depression railway bed drainage system is done further to specify.
A kind of miniature steel pipe pile stake web frame that is used for molten chamber, karst area tunnel roadbed as shown in Figure 1, that the utility model provides comprises tunnel structure 1, and the geologic structure of tunnel structure 1 below is for dissolving chamber processing section 8, and dissolving processing section 8 belows, chamber is basement rock 9.
Present embodiment is in order to solve the sedimentation of tunnel structure 1 under this geological conditions; Adopt following scheme: the layer of concrete 2 that is arranged at tunnel structure 1 bottom; Be arranged at the hardcore bed 3 of layer of concrete 2 bottoms; Said hardcore bed 3 is positioned at and dissolves above the chamber processing section 8, also is provided with two-layer GSZ 4 in the middle of the said hardcore bed 3.Carry out karst slip casting to processing section 8 bottoms, molten chamber and basement rock 9 junctions; When karst slip casting; Karst injected hole 5 is laid along roadbed longitudinal pitch 4 ~ 7m and horizontal spacing 4 ~ 7m; And karst injected hole 5 gos deep into basement rock 95 ~ 8m, and karst slip casting 5 can cut off surface water infiltrates, and keeps the long-time stability of bedding.Molten chamber processing section 8 from hardcore bed 3 lower floors on karst slip casting 5 bases is provided with miniature steel pipe pile 6, also is provided with reinforcing bar 7 in this every miniature steel pipe pile 6 and is filled with concrete, and this reinforcing bar 7 stretches into hardcore bed 0.2 ~ 0.4m.Said reinforcing bar 7 diameters are 10 ~ 16mm, are provided with reinforcing bar 7 in the miniature steel pipe pile 6 and can guarantee more effectively that with concrete bedding is stable, effectively prevent the sedimentation behind the worker.Said miniature steel pipe pile 6 stretches into and gos deep into basement rock 9 1.0 ~ 2m.6 footpaths of said miniature steel pipe pile are 100 ~ 120mm, and this footpath guarantees the supporting capacity of miniature steel pipe pile.Said miniature steel pipe pile 6 road longitudinal pitch 1 ~ 2.0m along the line, miniature steel pipe pile 6 road horizontal spacing 1 ~ 2.0m along the line, this spacing has guaranteed that the dynamic response of bedding under train dynamic load long term can meet the demands.
During the utility model practical implementation, roadbed top adopts open cut tunnel to pass through, and roadbed filling is partly considered the consistent ballastless track that adopts with whole tunnel.For satisfying code requirement, dissolving bottom, chamber roadbed filling material is the hard rock quarrel of tunnel excavation, answers layered rolling closely knit when filling, and (TB10001-2005) adopts the coefficient of consolidation consistent with bottom layer of subgrade according to " railway bed design specifications ".Karst slip casting spacing, miniature steel pipe pile stake 6 net stake footpaths, stake are long, pile spacing and bar diameter are confirmed according to bearing capacity and settlement calculation.
Claims (5)
1. one kind is used for the miniature steel pipe pile stake web frame that the karst area tunnel dissolves the chamber roadbed, comprises that the tunnel structure bottom is provided with layer of concrete, and the layer of concrete bottom is provided with hardcore bed, and this also is provided with GSZ in the middle of being provided with hardcore bed; This hardcore bed lower floor is for dissolving chamber processing section and basement rock; Dissolve processing section bottom, chamber and carry out karst slip casting with the basement rock junction; It is characterized in that; Molten chamber processing section from hardcore bed lower floor on karst slip casting basis is provided with miniature steel pipe pile, also is provided with reinforcing bar in this every miniature steel pipe pile and is filled with concrete.
2. the miniature steel pipe pile stake web frame that is used for molten chamber, karst area tunnel roadbed according to claim 1 is characterized in that said bar diameter is 10 ~ 16mm, and this reinforcing bar stretches into hardcore bed 0.2 ~ 0.4m.
3. the miniature steel pipe pile stake web frame that is used for molten chamber, karst area tunnel roadbed according to claim 1 is characterized in that said miniature steel pipe pile stretches into and gos deep into basement rock 1.0 ~ 2m, and said karst injected hole gos deep into basement rock 5 ~ 8m.
4. the miniature steel pipe pile stake web frame that is used for molten chamber, karst area tunnel roadbed according to claim 1 is characterized in that said miniature steel pipe pile stake directly is 100 ~ 120mm.
5. the miniature steel pipe pile stake web frame that is used for molten chamber, karst area tunnel roadbed according to claim 1; It is characterized in that; Said miniature steel pipe pile road along the line longitudinal pitch 1 ~ 2m; Miniature steel pipe pile road along the line horizontal spacing 1 ~ 2m, said karst injected hole road along the line longitudinal pitch 4 ~ 7m, karst injected hole horizontal spacing 4 ~ 7m carries out karst slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220212280 CN202595591U (en) | 2012-05-11 | 2012-05-11 | Micro steel pipe pile network structure for tunnel cavern roadbed in karst region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220212280 CN202595591U (en) | 2012-05-11 | 2012-05-11 | Micro steel pipe pile network structure for tunnel cavern roadbed in karst region |
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| Publication Number | Publication Date |
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| CN202595591U true CN202595591U (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220212280 Expired - Lifetime CN202595591U (en) | 2012-05-11 | 2012-05-11 | Micro steel pipe pile network structure for tunnel cavern roadbed in karst region |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276645A (en) * | 2013-05-09 | 2013-09-04 | 西南交通大学 | Precast pile, beam and slab renovation technology for diseases of existing line tunnel base |
| CN103510532A (en) * | 2013-09-26 | 2014-01-15 | 西南交通大学 | Railway tunnel bottom defect treatment technology based on assembly type beam slab pile |
| CN104612130A (en) * | 2014-11-28 | 2015-05-13 | 山东科技大学 | Method for processing grouting position of hidden cave at bottom of tunnel |
| CN106050277A (en) * | 2016-07-22 | 2016-10-26 | 中铁五局集团有限公司 | Strengthening process for soft-plastic collapsing body karst tunnel |
| CN107268465A (en) * | 2017-08-03 | 2017-10-20 | 中铁第勘察设计院集团有限公司 | Deep embeded type stake, compound contignation and its construction method of culvert are set in karst region |
| CN107476277A (en) * | 2017-07-25 | 2017-12-15 | 中铁二院工程集团有限责任公司 | Huge karst cavity ruggedized construction and construction method in Railway Tunnel |
| CN107964843A (en) * | 2017-12-06 | 2018-04-27 | 中铁二院工程集团有限责任公司 | A kind of high-speed railway Karst Subgrade construction and its restorative procedure for having warning function |
| CN111218942A (en) * | 2020-02-29 | 2020-06-02 | 中铁二院工程集团有限责任公司 | Thick-layer soil foundation tunnel open cut tunnel high-fill structure and construction method |
| CN111236963A (en) * | 2020-03-17 | 2020-06-05 | 中铁二院工程集团有限责任公司 | Open cut tunnel structure and construction method thereof |
-
2012
- 2012-05-11 CN CN 201220212280 patent/CN202595591U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276645A (en) * | 2013-05-09 | 2013-09-04 | 西南交通大学 | Precast pile, beam and slab renovation technology for diseases of existing line tunnel base |
| CN103276645B (en) * | 2013-05-09 | 2015-04-22 | 西南交通大学 | Precast pile, beam and slab renovation technology for diseases of existing line tunnel base |
| CN103510532A (en) * | 2013-09-26 | 2014-01-15 | 西南交通大学 | Railway tunnel bottom defect treatment technology based on assembly type beam slab pile |
| CN104612130A (en) * | 2014-11-28 | 2015-05-13 | 山东科技大学 | Method for processing grouting position of hidden cave at bottom of tunnel |
| CN106050277A (en) * | 2016-07-22 | 2016-10-26 | 中铁五局集团有限公司 | Strengthening process for soft-plastic collapsing body karst tunnel |
| CN107476277A (en) * | 2017-07-25 | 2017-12-15 | 中铁二院工程集团有限责任公司 | Huge karst cavity ruggedized construction and construction method in Railway Tunnel |
| CN107268465A (en) * | 2017-08-03 | 2017-10-20 | 中铁第勘察设计院集团有限公司 | Deep embeded type stake, compound contignation and its construction method of culvert are set in karst region |
| CN107964843A (en) * | 2017-12-06 | 2018-04-27 | 中铁二院工程集团有限责任公司 | A kind of high-speed railway Karst Subgrade construction and its restorative procedure for having warning function |
| CN111218942A (en) * | 2020-02-29 | 2020-06-02 | 中铁二院工程集团有限责任公司 | Thick-layer soil foundation tunnel open cut tunnel high-fill structure and construction method |
| CN111236963A (en) * | 2020-03-17 | 2020-06-05 | 中铁二院工程集团有限责任公司 | Open cut tunnel structure and construction method thereof |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20121212 |