CN106437774B - Single hole list cover tunnelling construction method - Google Patents
Single hole list cover tunnelling construction method Download PDFInfo
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- CN106437774B CN106437774B CN201611054354.XA CN201611054354A CN106437774B CN 106437774 B CN106437774 B CN 106437774B CN 201611054354 A CN201611054354 A CN 201611054354A CN 106437774 B CN106437774 B CN 106437774B
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 239000004567 concrete Substances 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000007569 slipcasting Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 239000011435 rock Substances 0.000 claims description 11
- 241000219098 Parthenocissus Species 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 239000011378 shotcrete Substances 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000013213 extrapolation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention provides a kind of single hole list cover tunnelling construction method, the 1st steps：Advance anchor bolt, ductule installation, slip casting；2nd step：Tunnel border line excavates；3rd step：Protective cover enters tunnel border line；4th step：Tunnel cutting；5th step：First pneumatically placed concrete；6th step：Reinforced mesh is installed；7th step：Steelframe（Steel grating）Installation；8th step：Rockbolt installation；9th step：To carrying out secondary injection concrete on the upside of protective cover；10th step：Part other than secondary lining protective cover.The beneficial effects of the invention are as follows constructing convenient for tunnelling, simplify supporting, utmostly ensure personnel and property safety, and simple in structure, easy to process with operation, the feasibility for excavating different tunnels is high.
Description
Technical field
The present invention relates to tunnel construction technologies, more particularly to a kind of single hole list cover tunnelling construction method.
Background technology
When by a variety of accumulation bodies, due to loosely organized, without cementing or cementing difference between particle, cause to cave in after excavation.
The accident that Geological Hazard is caused is also very more, this is still continued to use constant in the case where not knowing front adverse geological condition
Construction means, caused by not taking targetedly treatment measures in time.Front of tunnel heading rock crusher, joints development, rock
Stone trend is vertical, has interburden layer, front not to plan a successor band etc. between rock stratum, these unfavorable geologies easily cause cave in accident.Therefore,
The single hole list cover tunnelling construction method of exploitation is of great significance.
Invention content
It is an object of the invention to solve the cave in accident during tunnelling, effective protection construction safety simplifies just
Phase supporting.
To achieve the goals above, the technical solution adopted by the present invention is：
Single hole list cover tunnelling construction method, includes the following steps：
1st step：Advance anchor bolt, ductule installation, slip casting；
2nd step：Tunnel border line excavates；
3rd step：Protective cover enters tunnel border line；
4th step：Tunnel cutting；
5th step：First pneumatically placed concrete；
6th step：Reinforced mesh is installed；
7th step：Steelframe（Steel grating）Installation；
8th step：Rockbolt installation；
9th step：To carrying out secondary injection concrete on the upside of protective cover；
10th step：Part other than secondary lining protective cover.
1st step further comprises：
1）Advanced hollow grouting anchor, ductule and grid steel frame are used cooperatively, rock-bolt length 4.5m, ductule be for
3.5m, and should be greater than 2 times of cyclic advance；
2）Advance anchor bolt extrapolation angle is 10-15 °, and the outer limb of ductule is 10-25 °；
3）The slip casting of ductule periphery is suitable for from the stratum of 6 ~ 12 hours steady time.
2nd step further comprises：
1) it is excavated from side to the 1/3 of entire arc length；
2）Remaining segmental arc is excavated from the other side；
3）Clear up tunnel border line.
3rd step further comprises：
1）The depth that protective cover once enters tunnel border line is 1/3 ~ 2/3；
2）The secondary lining time conserves gunite concrete on the upside of protective cover on the outside of using protective cover；
3）After first pneumatically placed concrete, meet the secondary lining time and maintenance stabilization time, can carry out next section the 1st step ~
4th step.
5th step further comprises：
1）First injection top arch, from left to right or from right to left；
2）Fill-before-fire both sides wall, from bottom to top；
6th step further comprises：
1）, can be without first pneumatically placed concrete when country rock surface is more smooth, and bar-mat reinforcement is first hung, bar-mat reinforcement need to be close to rock
Wall, then pneumatically placed concrete covering；
2）When using double layer bar, second layer bar-mat reinforcement is laid with after first layer bar-mat reinforcement is covered by concrete, is covered
Lid thickness is not less than 3cm；
3）Bar-mat reinforcement is connected firmly with anchor pole.
7th step further comprises：
1) cross dimensions inspection is carried out before installing, timely processing owes to dig intrusion headroom part；
2) in-site measurement positions, and determines tunnel center line first, determines elevation, then measure steelframe again（Steel grating）It is vertical
To position；Steelframe（Steel grating）Thickness of shotcrete between country rock is not less than 40mm；
3) two rows of steelframes（Steel grating）Between peripherally every 1m 22 longitudinal reinforcement weld connections of φ, formed longitudinally connected
System.
8th step further comprises：
1）Bolthole position deviation is not more than 150mm, and hole keeps straight line；The length of body of rod exposed surface is thick no more than spray-up
Degree；
2）Anchor pole mortar is full, and makees pull-out bond test, and every 300 anchor poles inspect one group, every group 3 by random samples.
9th step further comprises：
1）Both sides wall is first sprayed, from bottom to top；
2）Arch at the top of fill-before-fire, from left to right or from right to left.
10th step further comprises：
1）Section inspection；
2）It is symmetrically carried out from both sides arch springing to vault；
3）Inverted arch and bottom plate.
Protective cover mainly adds including driving port, exterior side port, outer protective plate support plate, easy sliding floor, base angle support
Strong protection board, circumferential ribs, it is characterised in that：The vertical cross section of outer protective plate support plate is arch, rectangle, ellipse
（Cut away part in bottom）, it is round（Cut away part in bottom）, the unshielded plate in bottom, thickness is 5 ~ 50mm；Tunnel port, exterior side port
It is vertical, driving port cross-sectional is more than 200 ~ 400mm of exterior side port section, the outer protection between driving port, exterior side port
Plate support plate uniformly continuous is excessive；Several circumferential ribs of inside setting of outer protective plate support plate, circumferential ribs place are flat
Face is vertical, and vertical outer protective plate support plate, and the spacing of circumferential ribs is 200 ~ 500mm；In the outer protection of two side bottoms
The bottom of plate support plate is respectively easy sliding floor, and easy sliding floor is level, and width is 200 ~ 400mm；In outer protective plate branch
The inside or outside of fagging or inner side and outer side setting base angle support reinforcing protection board (4-5), base angle support reinforcing protection board
One end is connect with easy sliding floor, and the other end is connect with outer protective plate support plate, the horizontal both ends of base angle support reinforcing protection board
It arrives separately at driving port and exterior side port, main support monolithic stability simultaneously protects easy sliding floor.
Easy sliding floor is mainly by driving wheel, support sprocket wheel, directive wheel, thrust wheel, equalizer bar, steel plate track frame and creeper tread
Deng composition, there are multiple support sprocket wheels, support sprocket wheel to be uniformly distributed on the top of steel plate track frame；Have in the lower part of steel plate track frame multigroup
Thrust wheel, every group of thrust wheel is 2 ~ 8, and the connection axle center of thrust wheel is connected with equalizer bar, and equalizer bar (4-4-5) is carried out with steel plate
Tape holder connect, be at one end driving wheel, the other end be directive wheel, driving wheel, support sprocket wheel, directive wheel, thrust wheel outside be
Creeper tread.
The beneficial effects of the invention are as follows constructing convenient for tunnelling, simplify supporting, utmostly ensures personnel and property peace
Entirely, and simple in structure, easy to process with operation, the feasibility for excavating different tunnels is high.
Description of the drawings
Fig. 1 is advance anchor bolt, ductule installation, slip casting schematic diagram.
Fig. 2 is that tunnel border line excavates schematic diagram.
Fig. 3 is that protective cover enters tunnel border line schematic diagram.
Fig. 4 is tunnel cutting schematic diagram.
Fig. 5 is first pneumatically placed concrete schematic diagram.
Fig. 6 is reinforced mesh, steelframe（Steel grating）Scheme of installation.
Fig. 7 is rockbolt installation schematic diagram.
Fig. 8 is protective cover side elevation schematic diagram.
Fig. 9 is protective cover exterior side port elevational schematic view.
Figure 10 is easy sliding floor schematic diagram.
In figure：1 is advanced hollow grouting anchor；2 be non-tunneling；3 be tunnel border line；4 be protective cover；5 be hole
Body tunneling；6 be pneumatically placed concrete；7 be reinforced mesh and steelframe（Steel grating）；8 be anchor pole.
4-1 is driving port；4-2 is exterior side port；4-3 is outer protective plate support plate；4-4 is easy sliding floor；4-5 is
Base angle support reinforcing protection board；4-6 is circumferential ribs；4-4-1 is driving wheel；4-4-2 is support sprocket wheel；4-4-3 is directive wheel；
4-4-4 is thrust wheel；4-4-5 is equalizer bar；4-4-6 is steel plate track frame；4-4-7 is creeper tread.
Specific implementation mode
In order to further illustrate the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments, but not
They can be interpreted as limiting the scope of the present invention.
Embodiment：A kind of list hole list cover tunnelling construction method, as shown in Figure 1, including mainly driving port 4-1, outer
Side ports 4-2, outer protective plate support plate 4-3, easy sliding floor 4-4, base angle support reinforcing protection board 4-5, circumferential ribs 4-
6。
Single hole list cover tunnelling construction method, which is characterized in that include the following steps：
1st step：Advance anchor bolt, ductule installation, slip casting；
2nd step：Tunnel border line excavates；
3rd step：Protective cover enters tunnel border line；
4th step：Tunnel cutting；
5th step：First pneumatically placed concrete；
6th step：Reinforced mesh is installed；
7th step：Steelframe（Steel grating）Installation；
8th step：Rockbolt installation；
9th step：To carrying out secondary injection concrete on the upside of protective cover；
10th step：Part other than secondary lining protective cover；
11st step：Return to the 1st step.
1st step specifically includes：
1）Advanced hollow grouting anchor, ductule and grid steel frame are used cooperatively, rock-bolt length 4.5m, ductule be for
3.5m, and should be greater than 2 times of cyclic advance；
2）Advance anchor bolt extrapolation angle is 10-15 °, and the outer limb of ductule is 10-25 °；
3）The slip casting of ductule periphery was suitable for from 6 ~ 12 hours steady time.
2nd step specifically includes：
1) it is excavated from side to the 1/3 of entire arc length；
2）Remaining segmental arc is excavated from the other side；
3）Clear up tunnel border line.
3rd step specifically includes：
1）The depth that protective cover once enters tunnel border line is 1/3 ~ 2/3；
2）The secondary lining time conserves gunite concrete on the upside of protective cover on the outside of using protective cover；
3）After first pneumatically placed concrete, meet the secondary lining time and maintenance stabilization time, can carry out next section the 1st step ~
4th step.
5th step specifically includes：
1）First injection top arch, from left to right or from right to left；
2）Fill-before-fire both sides wall, from bottom to top.
6th step specifically includes：
1）, can be without first pneumatically placed concrete when country rock surface is more smooth, and bar-mat reinforcement is first hung, bar-mat reinforcement need to be close to rock
Wall, then pneumatically placed concrete covering；
2）When using double layer bar, second layer bar-mat reinforcement is laid with after first layer bar-mat reinforcement is covered by concrete, is covered
Lid thickness is not less than 3cm；
3）Bar-mat reinforcement is connected firmly with anchor pole.
7th step specifically includes：
1) cross dimensions inspection is carried out before installing, timely processing owes to dig intrusion headroom part；
2) in-site measurement positions, and determines tunnel center line first, determines elevation, then measure steelframe again（Steel grating）It is vertical
To position；Steelframe（Steel grating）Thickness of shotcrete between country rock is not less than 40mm；
3) two rows of steelframes（Steel grating）Between peripherally every 1m 22 longitudinal reinforcement weld connections of φ, formed longitudinally connected
System；
8th step specifically includes：
1）Bolthole position deviation is not more than 150mm, and hole keeps straight line；The length of body of rod exposed surface is thick no more than spray-up
Degree；
2）Anchor pole mortar is full, and makees pull-out bond test, and every 300 anchor poles inspect one group, every group 3 by random samples.
9th step specifically includes：
1）Both sides wall is first sprayed, from bottom to top；
2）Arch at the top of fill-before-fire, from left to right or from right to left；
10th step specifically includes：
1）Section inspection；
2）It is symmetrically carried out from both sides arch springing to vault；
3）Inverted arch and bottom plate.
Protective cover includes mainly driving port 4-1, exterior side port 4-2, outer protective plate support plate 4-3, easy sliding floor 4-
4, base angle support reinforcing protection board 4-5, circumferential ribs 4-6, it is characterised in that：Outer protective plate support plate 4-3's is vertical cross-section
Face is arch, rectangle, ellipse（Cut away part in bottom）, it is round（Cut away part in bottom）, the unshielded plate in bottom, thickness be 5 ~
50mm；Driving port 4-1, exterior side port 4-2 be it is vertical, the driving port sections 4-1 be more than the sections exterior side port 4-2 200 ~
400mm, the outer protective plate support plate 4-3 uniformly continuous between driving port 4-1, exterior side port 4-2 are excessive；Outer protective plate support
Several circumferential ribs 4-6 of inside setting of plate 4-3, plane where circumferential ribs 4-6 is vertical, and vertical outer protective plate branch
The spacing of fagging 4-3, circumferential ribs (4-6) are 200 ~ 500mm；In the bottom of the outer protective plate support plate 4-3 of two side bottoms
Respectively easy sliding floor 4-4, easy sliding floor 4-4 are level, and width is 200 ~ 400mm；Outer protective plate support plate 4-3's
Inside or outside or inner side and outer side are arranged base angle support reinforcing protection board 4-5, base angle support reinforcing one end protection board 4-5 with
Easy sliding floor 4-4 connections, the other end are connect with outer protective plate support plate 4-3, the level two of base angle support reinforcing protection board 4-5
End arrives separately at driving port 4-1 and exterior side port 4-2, and main support monolithic stability simultaneously protects easy sliding floor 4-4.
Easy sliding floor 4-4 includes driving wheel 4-4-1, support sprocket wheel 4-4-2, directive wheel 4-4-3, thrust wheel 4-4-4, balance
Beam 4-4-5, steel plate track frame 4-4-6 and creeper tread 4-4-7 have multiple support sprocket wheel 4-4- on the top of steel plate track frame 4-4-6
2, support sprocket wheel 4-4-2 is uniformly distributed；There are multigroup thrust wheel 4-4-4, every group of thrust wheel 4-4- in the lower part of steel plate track frame 4-4-6
4 be 2 ~ 8, and the connection axle center of thrust wheel 4-4-4 is connected with equalizer bar 4-4-5, equalizer bar 4-4-5 and steel plate track frame 4-4-
6 connections, are at one end driving wheel 4-4-1, are directive wheel 4-4-3 in the other end, driving wheel 4-4-1, support sprocket wheel 4-4-2, are oriented to
Take turns 4-4-3, the outside of thrust wheel 4-4-4 is creeper tread 4-4-7.
The above is only embodiments of the present invention, it is noted that those skilled in the art are come
It says, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of list hole list cover tunnelling construction method, which is characterized in that include the following steps：
1st step：Advance anchor bolt and ductule installation, slip casting；
2nd step：Tunnel border line excavates；
3rd step：Protective cover enters tunnel border line；
4th step：Tunnel cutting；
5th step：First pneumatically placed concrete；
6th step：Reinforced mesh is installed；
7th step：Steelframe is installed；
8th step：Rockbolt installation；
9th step：To carrying out secondary injection concrete on the upside of protective cover；
10th step：Part other than secondary lining protective cover;
Protective cover includes driving port (4-1), exterior side port (4-2), outer protective plate support plate (4-3), easy sliding floor (4-
4), base angle support reinforcing protection board (4-5), circumferential ribs (4-6)；The vertical cross section of outer protective plate support plate (4-3) is
The circle that ellipse that arch, rectangle, bottom are cut away, bottom are cut away, the unshielded plate in bottom, thickness are 5 ~ 50mm；Tunnel port
(4-1), exterior side port (4-2) are vertical, and driving port (4-1) depth of section is more than exterior side port (4-2) depth of section 200
~ 400mm, outer protective plate support plate (4-3) uniformly continuous between driving port (4-1), exterior side port (4-2) are excessive；It is outer anti-
Several circumferential ribs (4-6) of inside setting of baseboard support plate (4-3), plane where circumferential ribs (4-6) is vertical, and
The spacing of vertical outer protective plate support plate (4-3), circumferential ribs (4-6) is 200 ~ 500mm；In the outer protective plate of two side bottoms
The bottom of support plate (4-3) is respectively easy sliding floor (4-4), and easy sliding floor (4-4) is level, and width is 200 ~ 400mm；
At the inside of outer protective plate support plate (4-3) or outside or inner side and outer side setting base angle support reinforcing protection board (4-5), bottom
Angle support reinforcing protection board one end (4-5) is connect with easy sliding floor (4-4), and the other end connects with outer protective plate support plate (4-3)
It connects, the horizontal both ends of base angle support reinforcing protection board (4-5) arrive separately at driving port (4-1) and exterior side port (4-2), support
Monolithic stability simultaneously protects easy sliding floor (4-4);
Easy sliding floor (4-4) by driving wheel (4-4-1), support sprocket wheel (4-4-2), directive wheel (4-4-3), thrust wheel (4-4-4),
Equalizer bar (4-4-5), steel plate track frame (4-4-6) and creeper tread (4-4-7) are constituted, on the top of steel plate track frame (4-4-6)
There are multiple support sprocket wheels (4-4-2), support sprocket wheel (4-4-2) to be uniformly distributed；There is multigroup Zhi Chong in the lower part of steel plate track frame (4-4-6)
It takes turns (4-4-4), every group of thrust wheel (4-4-4) is 2 ~ 8, and the connection axle center of thrust wheel (4-4-4) is connected with equalizer bar (4-4-5)
It connects, equalizer bar (4-4-5) is connect with steel plate track frame (4-4-6), is at one end driving wheel (4-4-1), is to be oriented in the other end
Take turns (4-4-3), driving wheel (4-4-1), support sprocket wheel (4-4-2), directive wheel (4-4-3), thrust wheel (4-4-4) outside be crawler belt
Plate (4-4-7).
2. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 1st step tool
Body includes：
1）Advanced hollow grouting anchor, ductule and grid steel frame are used cooperatively, rock-bolt length 4.5m, and ductule length is
3.5m, and should be greater than 2 times of cyclic advance；
2）Advance anchor bolt extrapolation angle is 10-15 °, and the outer limb of ductule is 10-25 °；
3）The slip casting of ductule periphery is suitable for from the stratum of 6 ~ 12 hours steady time.
3. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 2nd step tool
Body includes：
1）It is excavated from side to the 1/3 of entire arc length；
2）Remaining segmental arc is excavated from the other side；
3）Clear up tunnel border line.
4. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 3rd step tool
Body includes：
1）The depth that protective cover once enters tunnel border line is the 1/3 ~ 2/3 of protective cover length；
2）The secondary lining time conserves gunite concrete on the upside of protective cover on the outside of using protective cover.
5. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 5th step tool
Body includes：
1）First injection top arch, from left to right or from right to left；
2）Fill-before-fire both sides wall, from bottom to top.
6. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 6th step tool
Body includes：
1）When country rock surface is more smooth, without first pneumatically placed concrete, and bar-mat reinforcement is first hung, bar-mat reinforcement need to be close to palisades, then spray
Concrete covers；
2）When using double layer bar, second layer bar-mat reinforcement is laid with after first layer bar-mat reinforcement is covered by concrete, and covering is thick
Degree is not less than 3cm；
3）Bar-mat reinforcement is connected firmly with anchor pole.
7. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 7th step tool
Body includes：
1) cross dimensions inspection is carried out before installing, timely processing owes to dig intrusion headroom part；
2) in-site measurement positions, and determines tunnel center line first, determines elevation, then measures the lengthwise position of steelframe again；Steelframe
Thickness of shotcrete between country rock is not less than 40mm；
3) between two rows of steelframes longitudinally connected system is formed peripherally every 1m diameter 22mm longitudinal reinforcement weld connections.
8. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 8th step tool
Body includes：
1）Bolthole position deviation is not more than 150mm, and hole keeps straight line；The length of body of rod exposed surface is not more than jetting thickness；
2）Anchor pole mortar is full, and makees pull-out bond test, and every 300 anchor poles inspect one group, every group 3 by random samples.
9. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 9th step tool
Body includes：
1）Both sides wall is first sprayed, from bottom to top；
2）Arch at the top of fill-before-fire, from left to right or from right to left.
10. a kind of single hole list cover tunnelling construction method according to claim 1, which is characterized in that the 10th step
It specifically includes：
1）Section inspection；
2）It is symmetrically carried out from both sides arch springing to vault；
3）Inverted arch and bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611054354.XA CN106437774B (en) | 2016-11-25 | 2016-11-25 | Single hole list cover tunnelling construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611054354.XA CN106437774B (en) | 2016-11-25 | 2016-11-25 | Single hole list cover tunnelling construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106437774A CN106437774A (en) | 2017-02-22 |
| CN106437774B true CN106437774B (en) | 2018-10-02 |
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|---|---|---|---|
| CN201611054354.XA Active CN106437774B (en) | 2016-11-25 | 2016-11-25 | Single hole list cover tunnelling construction method |
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| CN107504872B (en) * | 2017-09-13 | 2019-03-05 | 大连理工大学 | A kind of blasting method for preventing tunnel arch foot to owe to dig |
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