CN103982188B - The supporting structure system of rocky stratum big cross section deep shaft and construction method thereof - Google Patents
The supporting structure system of rocky stratum big cross section deep shaft and construction method thereof Download PDFInfo
- Publication number
- CN103982188B CN103982188B CN201410241602.6A CN201410241602A CN103982188B CN 103982188 B CN103982188 B CN 103982188B CN 201410241602 A CN201410241602 A CN 201410241602A CN 103982188 B CN103982188 B CN 103982188B
- Authority
- CN
- China
- Prior art keywords
- steel
- bracing members
- steel frame
- gunite concrete
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to supporting structure system and the construction method thereof of a kind of rocky stratum big cross section deep shaft.The bigger vertical shaft of section as only with steelframe bolt-spary supports, effectively controls the most more difficulty to the stability of shaft wall and deformation.The present invention includes first gunite concrete of vertical shaft four wall, is preset with a just grid steel frame in it；Just it is provided with the bracing members of multilamellar transverse horizontal in the shaft space in a gunite concrete from top to bottom, bracing members includes the straight bracing members at curved steel support and the middle part being positioned at corner, end is each attached to be arranged in ring week the steel of a just gunite concrete inwall and encloses on purlin, and steel encloses purlin periphery and is fixed in pre-first the profile steel frame being embedded in first gunite concrete；Just a grid steel frame and a first profile steel frame are all welded with a just anchor pole, and the other end squeezes into country rock.Flexible support is reasonably combined by the present invention with rigid support, does not change conventional support pattern, easy construction, reduces investment outlay, enhance the stability in the large of vertical shaft foundation ditch.
Description
Technical field
The invention belongs to tunnel construction technical field, be specifically related to supporting structure system and the construction method thereof of a kind of rocky stratum big cross section deep shaft.
Background technology
21 century is the period that underground engineering develops rapidly, and the construction of China's subway engineering was the most like a raging fire the most in recent years.The extensively application in subway engineering of the rock tunnel development machine is had higher requirement to its working shaft size and the degree of depth；Additionally, big cross section deep shaft is also widely used in the underground engineering construction in other field.The biggest excavated section and cutting depth, be to consider supporting type or by deep basal pit to perform building enclosure by general vertical shaft, be to put the difficult problem in face of design；Being exactly steelframe bolt-spary supports for general vertical shaft at the support pattern that rocky stratum is the most frequently used, but for the bigger vertical shaft of section, as only with steelframe bolt-spary supports, it effectively controls the most more difficulty to the stability of shaft wall and deformation, and security risk is bigger；As considered by deep basal pit, use conventional " bored concrete pile+inner support " supporting type, then construction investment and construction speed are all had considerable influence, cause the biggest engineering to waste.
Summary of the invention
It is an object of the invention to provide supporting structure system and the construction method thereof of a kind of rocky stratum big cross section deep shaft, change conventional support pattern, be more suitable for relatively heavy excavation section and the operating mode of cutting depth.
The technical solution adopted in the present invention is:
The supporting structure system of rocky stratum big cross section deep shaft, it is characterised in that:
Include first gunite concrete of vertical shaft four wall, just in a gunite concrete, be preset with a just grid steel frame；
Just it is provided with the bracing members of multilamellar transverse horizontal in the shaft space in a gunite concrete from top to bottom, bracing members includes the straight bracing members at curved steel support and the middle part being positioned at corner, the end of curved steel support and straight bracing members is each attached to be arranged in ring week the steel of a just gunite concrete inwall and encloses on purlin, and steel encloses purlin periphery and is fixed in pre-first the profile steel frame being embedded in first gunite concrete；
Just a grid steel frame and a first profile steel frame are all welded with a just anchor pole, just prop up an anchor pole other end and squeeze into country rock.
Being connected by connection reinforcement welding between a described just grid steel frame, vertical spacing is 0.5-1m；
A described just profile steel frame is 3 Pin simultaneous I-steel, and connected by being connected reinforcement welding between first the grid steel frame closed on up and down.
The vertical spacing of described bracing members is 3-6m, and curved steel support and straight bracing members enclose connection one end of purlin for fixing connection, the other end for being flexibly connected with steel.
It is 2 Pin simultaneous I-steel that described steel encloses purlin, and a just gunite concrete is fixed on by oblique reinforcing pull rod in inner edge, upper end, and lower end is fixed with angle steel A-frame, and outer ring is fixed with the Short bolt squeezing into a just gunite concrete.
The construction method of the supporting structure system of rocky stratum big cross section deep shaft, it is characterised in that:
Realized by following steps:
Step one: Shaft bank is provided with conventional mould and builds steel reinforced concrete fore shaft circle, pour after reaching design strength 70%, set up the bracing members of ground floor transverse horizontal, comprising the curved steel support in four corners and the straight bracing members at a middle part, the end of curved steel support and straight bracing members is all connected to inside steel reinforced concrete fore shaft circle；
Step 2: vertical shaft excavates downwards, at vertical shaft four wall just pneumatically placed concrete and lay bar-mat reinforcement；Erect a just grid steel frame, between be connected by connecting reinforcement welding, vertical spacing is 0.5-1m；An erection just profile steel frame between a just grid steel frame, just a profile steel frame is 3 Pin simultaneous I-steel, and connected by being connected reinforcement welding between first the grid steel frame closed on up and down, and vertical spacing is 3-6m；A welding just anchor pole on a just grid steel frame and first profile steel frame, a first anchor pole other end squeezes into country rock；Multiple pneumatically placed concrete to preliminary bracing is 350mm；Excavation and supporting cyclic advance are 1m.
The invention have the advantages that
The present invention on the basis of vertical shaft steelframe bolt-spary supports, arrange can the bracing members system of Shi Hanzhang, according to the size of shaft section area and the plane of bracing members can be laid by the power of strata pressure and vertical spacing adjust；Simultaneously according to the feature of supporting type, being optimized the connecting joint point between enclosing purlin and just propping up, in order to realize the good combination of rigid support and flexible support, do not change conventional support pattern, not only convenient construction operation, goes back cost saving；Be provided with can the bracing members system of Shi Hanzhang, be possible not only to effectively control shaft wall deformation and ground settlement, also enhance the stability in the large of vertical shaft foundation ditch, thus reduce engineering risk.
After formed product of the present invention, being the formation of vertical shaft temporary support structures, can meet construction period slags tap the requirement of the correlation functions such as charging, as performed vertical shaft permanent structure, can tear support, form concrete two lining the most piecemeal open, meet it and normally use requirement.So just solve the contradiction of the supporting construction pattern type selecting that steelframe bolt-spary supports pattern risk is big, bored concrete pile+inner support supporting type cost long in time limit is high, its railway, highway, Hydraulic Tunnel, urban subway tunnel, etc. construction field all have a wide range of applications.
Accompanying drawing explanation
Fig. 1 is shaft support structure transverse face (plane) schematic diagram.
Fig. 2 is shaft support structural profile (facade) schematic diagram.
Fig. 3 is that steel encloses purlin and is connected drawing with at the beginning of vertical shaft.
In figure, a profile steel frame at the beginning of a grid steel frame, 4-at the beginning of a gunite concrete, 3-at the beginning of an anchor pole, 2-at the beginning of 1-, the straight bracing members of 5-, 6-curved steel support, 7-steel encloses purlin, the oblique reinforcing pull rod of 8-, 9-angle steel A-frame, 10-Short bolt.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be described in detail.
Rocky stratum big cross section deep shaft involved in the present invention involved in the present invention, section excavation size (17.3x11.3) m, excavation area reaches 195.5m2, cutting depth reaches 39.6m；The biggest excavated section and cutting depth, be to consider supporting type or by deep basal pit to perform building enclosure by general vertical shaft, be to put the difficult problem in face of design；Being exactly steelframe bolt-spary supports for general vertical shaft at the support pattern that rocky stratum is the most frequently used, but for the bigger vertical shaft of section, as only with steelframe bolt-spary supports, it effectively controls the most more difficulty to the stability of shaft wall and deformation, and security risk is bigger；As considered by deep basal pit, use conventional bored concrete pile+inner support supporting type, then construction investment and construction speed are all had considerable influence, the biggest engineering can be caused to waste.Based on case above, on the basis of general vertical shaft steelframe bolt-spary supports, arrange can the bracing members system of Shi Hanzhang, according to the size of shaft section area and the plane of bracing members can be laid by the power of strata pressure and vertical spacing adjust；Simultaneously according to the feature of supporting type, the connecting joint point between enclosing purlin and just propping up is optimized, in order to realize the good combination of rigid support and flexible support, ensure globality and the effectiveness of whole supporting structure system simultaneously.
The supporting structure system of rocky stratum big cross section deep shaft involved in the present invention, includes preliminary bracing system and bracing members system.Preliminary bracing system includes just a gunite concrete 2, just a grid steel frame 3, just a profile steel frame 4 and just an anchor pole 1.Bracing members system is the bracing members of transverse horizontal, encloses purlin 7 including curved steel support 6, straight bracing members 5 and steel.
Concrete structure is: include first gunite concrete 2 of vertical shaft four wall, is just preset with a just grid steel frame 3 in a gunite concrete 2.Just it is provided with the bracing members of multilamellar transverse horizontal in the shaft space in a gunite concrete 2 from top to bottom, bracing members includes the straight bracing members 5 at the curved steel support 6 and middle part being positioned at corner, the end of curved steel support 6 and straight bracing members 5 is each attached to be arranged in ring week the steel of just gunite concrete 2 inwall and encloses on purlin 7, steel encloses purlin 5 and fits with preliminary bracing Internal periphery, and close cyclization, steel encloses purlin 7 periphery and is fixed in pre-first the profile steel frame 4 being embedded in first gunite concrete 2, certain prestress is done for preliminary bracing, ensure the monolithic stability in big cross section vertical shaft foundation pit construction stage.Just a grid steel frame 3 and a first profile steel frame 4 are all welded with a just anchor pole 1, just prop up anchor pole 1 other end and squeeze into country rock.Just a grid steel frame 3, just a profile steel frame 4 and a first anchor pole 1 are just propped up and are formed certain thickness flexible preliminary bracing structure after gunite concrete 2 wraps up, and keep inherent strength and the self-bearing ability of country rock, the deformation of common opposing country rock.
Wherein, just connected by connecting reinforcement welding between a grid steel frame 3, vertical spacing is 0.5-1m；Just a profile steel frame 4 is 3 Pin simultaneous I-steel, and connected by being connected reinforcement welding between first the grid steel frame 3 closed on up and down；The vertical spacing of bracing members is 3-6m, and curved steel support 6 and straight bracing members 5 enclose connection one end of purlin 7 for fixing connection, the other end for being flexibly connected with steel.Bracing members should determine vertical spacing in conjunction with shaft section area size and strata pressure；Shield well excavated section is general all at 100m2Above, need to consider to arrange curved steel support 6 in the corner of vertical shaft, curved steel support 6 both sides adjacent with vertical shaft form the isosceles triangle of angle 45 °, effectively reduce the span of vertical shaft preliminary bracing, improve its stress condition；As longer in long limit, according to circumstances can increase straight bracing members 5 on long limit, two ends are supported in the long limit of vertical shaft；As shaft section area is bigger, long minor face is both needed to set up straight bracing members 5, i.e. 1 can be laid by vertical interval, 3,5 ... road supports and only arranges the straight bracing members of corner curved steel support 6 and long limit 5,2,4,6 ... road supports and only arranges corner curved steel support 6 and the straight bracing members of minor face 5 avoids cross interference, and suitably reduces and support vertical spacing.
It is 2 Pin simultaneous I-steel that steel encloses purlin 7, and a just gunite concrete 2 is fixed on by oblique reinforcing pull rod 8 in inner edge, upper end, and lower end is fixed with angle steel A-frame 9, and spacing 3m, between the upper and lower every laying；Simultaneously taking account of vertical shaft just Zhi Houdu and rigidity is little, for further ensuring that steel encloses the firm of purlin 7, outer ring is fixed with the Short bolt 10 squeezing into a just gunite concrete 2, and upper and lower both sides are laid by spacing 3m interval.
Concrete construction method is as follows:
Step one: Shaft bank is provided with conventional mould and builds steel reinforced concrete fore shaft circle, pour after reaching design strength 70%, set up the bracing members of ground floor transverse horizontal, comprising curved steel support 6 and the straight bracing members 5 at a middle part in four corners, the end of curved steel support 6 and straight bracing members 5 is all connected to inside steel reinforced concrete fore shaft circle；
Step 2: vertical shaft excavates downwards, at vertical shaft four wall just pneumatically placed concrete and lay φ 8@150x150 bar-mat reinforcement；Erect a 4 φ 25 just grid steel frame 3, between be connected by connecting reinforcement welding, vertical spacing is 0.5-1m；Propping up just and erect a profile steel frame 4 at the beginning of work 25b between grid steel frame 3, just a profile steel frame 4 is 3 Pin simultaneous I-steel, and connected by being connected reinforcement welding between first the grid steel frame 3 closed on up and down, and vertical spacing is 3-6m；A just grid steel frame 3 and first profile steel frame 4 weld an anchor pole 1 at the beginning of φ 25 hollow slip casting, just props up anchor pole 1 other end and squeeze into country rock；Multiple pneumatically placed concrete to preliminary bracing is 350mm；Excavation and supporting cyclic advance are 1m.
Bracing members typically selects the φ 609 steel pipe inner supporting system that foundation pit supporting project is conventional, in order to draws materials and reuses.During shaft excavation, be combineding with each other of the systemic circulation set up by the partial circulating of preliminary bracing and bracing members, after safety shaft is excavated to designed elevation, define vertical shaft temporary support structures, can meet construction period slags tap the requirement of the correlation functions such as charging, as vertical shaft permanent structure need to be performed, support, form concrete two lining can be torn the most piecemeal open, meet it and normally use requirement.
The supporting structure system of this rocky stratum big cross section deep shaft solves the contradiction of the supporting construction type selecting that the deformation of steelframe bolt-spary supports pattern is wayward, risk big and bored concrete pile+inner support supporting type is long in time limit, cost is high, flexible support is reasonably combined with rigid support: do not change the steelframe bolt-spary supports mode of routine, not only convenient construction operation, goes back cost saving；Be provided with can the bracing members system of Shi Hanzhang, be possible not only to effectively control shaft wall deformation and ground settlement, also enhance the stability in the large of vertical shaft foundation ditch, thus reduce engineering risk.
Present disclosure is not limited to cited by embodiment, and the conversion of any equivalence that technical solution of the present invention is taked by those of ordinary skill in the art by reading description of the invention, the claim being the present invention is contained.
Claims (1)
1. the supporting structure system of rocky stratum big cross section deep shaft, it is characterised in that:
Include first gunite concrete (2) of vertical shaft four wall, in just propping up gunite concrete (2), be preset with a just grid steel frame (3)；
Just it is provided with the bracing members of multilamellar transverse horizontal in the shaft space in a gunite concrete (2) from top to bottom, bracing members includes the straight bracing members (5) at curved steel support (6) and the middle part being positioned at corner, the end of curved steel support (6) and straight bracing members (5) is each attached to be arranged in ring week the steel of just gunite concrete (2) inwall and encloses on purlin (7), and steel encloses purlin (7) periphery and is fixed on pre-first the profile steel frame (4) being embedded in first gunite concrete (2)；
Just a grid steel frame (3) and a first profile steel frame (4) are all welded with a just anchor pole (1), just prop up anchor pole (1) other end and squeeze into country rock；
Being connected by connection reinforcement welding between a described just grid steel frame (3), vertical spacing is 0.5-1m；
A described just profile steel frame (4) is connected by being connected reinforcement welding between 3 Pin simultaneous I-steel, and first the grid steel frame (3) closed on up and down；
The vertical spacing of described bracing members is 3-6m, and curved steel support (6) and straight bracing members (5) enclose connection one end of purlin (7) for fixing connection, the other end for being flexibly connected with steel；
It is 2 Pin simultaneous I-steel that described steel encloses purlin (7), and a just gunite concrete (2) is fixed on by oblique reinforcing pull rod (8) in inner edge, upper end, and lower end is fixed with angle steel A-frame (9), and outer ring is fixed with the Short bolt (10) squeezing into a just gunite concrete (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410241602.6A CN103982188B (en) | 2014-06-03 | 2014-06-03 | The supporting structure system of rocky stratum big cross section deep shaft and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410241602.6A CN103982188B (en) | 2014-06-03 | 2014-06-03 | The supporting structure system of rocky stratum big cross section deep shaft and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103982188A CN103982188A (en) | 2014-08-13 |
| CN103982188B true CN103982188B (en) | 2017-01-04 |
Family
ID=51274330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410241602.6A Active CN103982188B (en) | 2014-06-03 | 2014-06-03 | The supporting structure system of rocky stratum big cross section deep shaft and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103982188B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905523A (en) * | 2019-12-04 | 2020-03-24 | 成都轨道建设管理有限公司 | Subway vertical shaft construction method |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201514B (en) * | 2015-09-15 | 2017-08-11 | 中国矿业大学 | A kind of water-bearing stratum shaft wall structure and construction method |
| CN106050239B (en) * | 2016-06-14 | 2018-06-15 | 中铁十二局集团有限公司 | The deep pozo construction method of enclosure structure of strong rich water upper-soft lower-hard ground |
| CN108978709B (en) * | 2018-07-20 | 2020-09-04 | 中铁十六局集团地铁工程有限公司 | Urban comprehensive pipe gallery branch construction method in space-limited environment |
| CN109826654A (en) * | 2019-03-12 | 2019-05-31 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel ventilation well supporting construction and its construction method |
| CN110306563A (en) * | 2019-07-22 | 2019-10-08 | 中铁第一勘察设计院集团有限公司 | Steel purlin fall arrest conversion equipment |
| CN111075452A (en) * | 2019-12-23 | 2020-04-28 | 重庆市轨道交通设计研究院有限责任公司 | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method |
| CN113090272A (en) * | 2021-04-26 | 2021-07-09 | 中国恩菲工程技术有限公司 | Deep shaft and partition supporting method thereof |
| CN114215524B (en) * | 2021-12-16 | 2024-02-20 | 哈尔滨工业大学 | Corrugated steel shotcrete shaft support |
| CN115492126A (en) * | 2022-10-26 | 2022-12-20 | 中国电建集团西北勘测设计研究院有限公司 | Steel sheet pile and vertical shaft combined foundation pit supporting structure and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013064270A (en) * | 2011-09-16 | 2013-04-11 | Kurimoto Concrete Industries Ltd | Method of manufacturing segment type shaft casing |
| CN103075158A (en) * | 2013-02-04 | 2013-05-01 | 中国矿业大学 | Steel plate and steel reinforced concrete well wall |
| CN203476337U (en) * | 2013-08-22 | 2014-03-12 | 天津市市政工程设计研究院 | Shield shaft concrete fender post and multi-layer plane frame combination supporting structure |
| CN203879506U (en) * | 2014-06-03 | 2014-10-15 | 中铁第一勘察设计院集团有限公司 | Supporting structure system for large-section deep vertical shaft in rock stratum |
-
2014
- 2014-06-03 CN CN201410241602.6A patent/CN103982188B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013064270A (en) * | 2011-09-16 | 2013-04-11 | Kurimoto Concrete Industries Ltd | Method of manufacturing segment type shaft casing |
| CN103075158A (en) * | 2013-02-04 | 2013-05-01 | 中国矿业大学 | Steel plate and steel reinforced concrete well wall |
| CN203476337U (en) * | 2013-08-22 | 2014-03-12 | 天津市市政工程设计研究院 | Shield shaft concrete fender post and multi-layer plane frame combination supporting structure |
| CN203879506U (en) * | 2014-06-03 | 2014-10-15 | 中铁第一勘察设计院集团有限公司 | Supporting structure system for large-section deep vertical shaft in rock stratum |
Non-Patent Citations (2)
| Title |
|---|
| 复合式TBM在重庆地铁实践中的关键技术研究;王俊;《现代隧道技术》;20111231;第48卷(第6期);第90-91页的5.2节，图7 * |
| 复杂条件下盾构改造竖井的设计与施工;张兆军等;《隧道建设》;20091231;第29卷(第6期);全文 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905523A (en) * | 2019-12-04 | 2020-03-24 | 成都轨道建设管理有限公司 | Subway vertical shaft construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103982188A (en) | 2014-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103982188B (en) | The supporting structure system of rocky stratum big cross section deep shaft and construction method thereof | |
| CN106337686B (en) | Three layers of subway station canopy structure of rocky stratum tunneling and construction method | |
| CN101614125B (en) | Construction method of V-level surrounding rock tunnel | |
| CN205742213U (en) | Foundation pit supporting construction | |
| CN102536273B (en) | 26-meter large-span space one-step forming construction method | |
| CN109026026B (en) | Construction method of large-section multi-line multi-arch underground excavation tunnel group penetrating existing pipe gallery | |
| CN204729099U (en) | Rock quality layer tunneling three layers of subway station canopy structure | |
| CN110905530B (en) | Stability control construction method for water-rich soft rock tunnel penetrating fault fracture zone | |
| CN102758642A (en) | Long-span tunnel overlapping carrying arch structure for upper-soft and lower-hard stratum and construction method thereof | |
| CN103628885A (en) | Tunnel exit cover-excavation construction method of Ultra-shadow buried tunnel | |
| CN109404005A (en) | Bored tunnel duck eye is into big hole pre-add solid system and construction method | |
| CN203879506U (en) | Supporting structure system for large-section deep vertical shaft in rock stratum | |
| CN112031814B (en) | Cave-entering construction method for crossing shallow-layer high-load highway | |
| CN1307348C (en) | Construction method for underground structure through half reverse course of action of inverting connection | |
| CN103114595A (en) | Support method and device of support pile preformed core-soil double-buttress inclined inner-strut foundation ditch | |
| CN104653188A (en) | Method for arranging large-diameter shield receiving and originating well in underground-excavated air duct | |
| CN105019553A (en) | Bracing structure for annular supports of basement | |
| CN203160254U (en) | Pit support structure | |
| CN208702421U (en) | The tunnel support structure of existing pile foundation building is worn under a kind of | |
| CN114562289A (en) | Rapid treatment method for large-scale cavity collapse of soft broken surrounding rock tunnel vault | |
| CN104863613B (en) | Rocky stratum tunneling underground structure flash joist anchor draws just branch structure and construction method | |
| CN204851265U (en) | Bearing structure in work well under high water pressure condition | |
| CN105178355B (en) | The stratum pre-reinforcement processing method of underground space construction | |
| CN105840209A (en) | Construction method for controlling deformation of anchor piles at barrel segment of tunnel | |
| CN206144578U (en) | Last soft hard ground layer tunnel supporting structure down |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |