CN108915702A - It is a kind of circle narrow-bore tunnel in shield method of reseptance - Google Patents
It is a kind of circle narrow-bore tunnel in shield method of reseptance Download PDFInfo
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- CN108915702A CN108915702A CN201810600751.5A CN201810600751A CN108915702A CN 108915702 A CN108915702 A CN 108915702A CN 201810600751 A CN201810600751 A CN 201810600751A CN 108915702 A CN108915702 A CN 108915702A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims abstract description 7
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 69
- 239000010959 steel Substances 0.000 claims description 69
- 238000007569 slipcasting Methods 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 21
- 239000004567 concrete Substances 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 9
- 230000005641 tunneling Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 210000003205 muscle Anatomy 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 238000005065 mining Methods 0.000 claims description 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 3
- 210000001015 abdomen Anatomy 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000007363 ring formation reaction Methods 0.000 claims description 3
- 102200067611 rs111033606 Human genes 0.000 claims description 3
- 239000011378 shotcrete Substances 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 1
- 238000010348 incorporation Methods 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 241000537371 Fraxinus caroliniana Species 0.000 description 2
- 235000010891 Ptelea trifoliata Nutrition 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- 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
-
- 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
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
It is a kind of circle narrow-bore tunnel in shield method of reseptance, include the following steps：S1, tunnel advanced support；S2, preliminary bracing；S3, preliminary bracing hogback radial grouting are reinforced；S4, face block and reinforce the front soil body；S5, Tunnel Second Lining；S6, shield driving section advance support；S7, mortar backfill；S8, guide table installation；S9, precipitation；S10, shield receive；The present invention has many advantages, such as not needing installation rubber water-proof heavy curtain, succinct convenient, construction safety, can promote the use of shield machine and receive construction field.
Description
Technical field
The invention belongs to shield machines to receive construction field, and in particular to city underground in rich water sandy gravel circular tunnel
Shield receives construction method.
Background technique
In city underground shield-tunneling construction, shield machine is received generally using direct directly on receiving bracket or arc guide table
It receives, it is general to use " CD " method or " CRD " method or bilateral wall approach in the shallow-depth-excavation tunnel of city, it uses and faces in supporting section
When median septum or interim inverted arch is set in the middle part of section, shield must cut off temporary support when receiving construction.And in this project,
Tunnel Passing stratum is mainly sand-pebble layer, and level of ground water is higher, shield cutter diameter 6280mm, Mining Method circular tunnel lining
Section internal diameter 6400mm is built, in addition Tunneling by mining method decomposition mileage is located at 12 layers of building basis footing lower part, simply uses
Conventional method receives construction, it is difficult to ensure that construction safety.
Summary of the invention
Technical problem to be solved by the present invention lies in above-mentioned the deficiencies in the prior art are overcome, one kind is provided and does not need to install
Shield method of reseptance in rubber water-proof heavy curtain, succinct convenient, construction safety round narrow-bore tunnel.
Above-mentioned technical problem is solved the technical solution adopted is that including the following steps：
S1, tunnel advanced support：In such a way that steel tube shed plus self-feeding anchor pile front pre-grouting are reinforced；
S2, preliminary bracing：Steel arch-shelf is arranged in loopful；
S3, preliminary bracing hogback radial grouting are reinforced：In the early stage when supporting construction within the scope of 120 ° of vault the pre-buried spray of molten steel
Pipe makees Grouting Pipe, carries out grouting and reinforcing；
S4, face block and reinforce the front soil body：When Tunneling by mining method is excavated at plug wall, C25 is sprayed in time
Concrete enclosing face and built-in pipe canopy guide pipe；
S5, Tunnel Second Lining：Under conditions of not tearing support open, the 200m thickness secondary lining that applies；
S6, shield driving section advance support：After completing secondary lining, set within the scope of 120 ° of end vault advanced big
Pipe canopy；
S7, mortar backfill：After completing secondary lining and end daguanpeng construction, then removes temporary steel support and use
The plain-water slurry backfill for mixing appropriate swelling agent blocks the section 9m；
S8, guide table installation：C20 pea gravel concreten guide table, pre-buried installation steel plate and guide rail are poured in circular tunnel bottom；
S9, precipitation：Using constructing tunnel dewatering well, precipitation is carried out in advance before shield receives；
S10, shield receive：Shield is directly tunneled to be received in guide table by 9m backfill section, and backfill section uses shield duct piece
Assembly molding.
Step S1 of the invention includes：Steel tube shed uses diameter for the P110 steel floral tube of 146mm, wall thickness 9mm, and 120 ° of vault
Injection in range, circumferential center spacing are 300mm, and outer limb is 1~2 °, and every loop number is 31, are overlapped by 3m, steel tube shed
Slip casting use the ratio of mud for 0.5~1.0 cement single slurry, grouting pressure be 0.5~1.2MPa, mud jacking sequence from bottom to top,
First two sides rear center, symmetrical mud jacking, grouting pressure are gradually increased by small；It is seamless that self-feeding anchor pile uses diameter to prick for the heat of 32mm
Steel pipe, wall thickness 4mm, length 2.2m arrange, spacing circumferential direction 0.3m × longitudinal direction 1.0m that outer limb is 10 within the scope of 120 ° of hogback
~15 °, steel pipe tail end should be placed in steel arch-shelf abdomen, and slip casting uses 0.5~1.0 cement slurry of the ratio of mud, and grouting pressure 0.3~
0.5MPa。
Step S2 of the invention includes：Steel arch-shelf, I20a steel arch-shelf spacing 0.5m setting is arranged in loopful, and diameter is 8mm's
Double steel bar mesh sheet constitutes 150mm × 150mm grid, and the setting of loopful bilayer is respectively placed in inside and outside steel arch-shelf；Inside and outside
The longitudinally connected muscle that diameter is 22mm, longitudinally connected muscle circumferential direction spacing 1.0m are set；Gunite concrete uses C25P6 early strong coagulation
Soil, spray is mixed with a thickness of 300mm, and tunneling boring supporting, middle partition, interim inverted arch support thickness are 250mm；Lock foot anchoring stock uses R32S
Self-drilling locks foot anchor tube, and long 3.0m is set to the girth joint of preliminary bracing steel arch-shelf and partial excavation base tunnel corner portion, between longitudinal direction
Away from same steel arch-shelf longitudinal pitch, 120 ° of range built-in slip casting pipes of vault, spacing circumferential direction 2.0m × longitudinal direction 2.0m is in quincunx cloth
It sets, Grouting Pipe uses diameter for the steel pipe of 32mm, wall thickness 3.5mm, length 0.8m.
Step S3 of the invention includes：The spray of molten steel pipe diameter is 42mm, wall thickness 3.5mm, length are preliminary bracing thickness
Degree+0.5m, Grouting Pipe spacing circumferential direction 2.0m × longitudinal direction 2.0m, blossom type arrangement, whenever preliminary bracing is closed cyclization 50m length
Afterwards, to preliminary bracing hogback grouting methol, the cement slurry ratio of mud is 0.5~1.0, and grouting pressure is 0.1~0.3MPa.
Step S4 of the invention includes：C25 concrete enclosing face is sprayed, the concrete thickness of injection is 300mm, is mixed
The double-deck diameter is set in solidifying soil and constitutes 150mm × 150mm grid as the glass fiber-reinforced polymer of 12mm, and is connect with preliminary bracing grid,
Reserved injected hole when plug wall is constructed.
Step S6 of the invention includes：The steel tube shed uses the P110 steel floral tube that diameter is 9mm for 146mm, wall thickness,
In hogback, outer limb is 1~2 ° for circumferential center spacing 300mm injection, and steel tube shed length is 20m, and steel tube shed slip casting is using water ash
Than 0.5~1.0 cement slurry single slurry, grouting pressure is 0.5~1.2MPa.
The present invention has the following advantages that compared with the prior art：
1, can be used for ground not reinforcing the shield launching of condition, receive construction, constructing operation is convenient；
2, reduce stratum settlement landslide risk, it is safer, quick that shield receives construction.
Detailed description of the invention
Fig. 1 is that shield of the present invention receives profilograph.
Fig. 2 is shield receiving plane figure of the present invention.
Fig. 3 is that shield of the present invention receives cross-sectional view.
In figure：1, preliminary bracing；2, hogback ejection for water plugging circle；3, Tunnel Second Lining；4, tunnel lining cutting three times；5, shield
Section of jurisdiction；6, plug wall；7, steel tube shed；8, shield；9, mortar backfills.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples, but the present invention is not restricted to these implement
Example.
Embodiment 1
In figs. 1 to 3, shield method of reseptance in a kind of round narrow-bore tunnel of the present invention, includes the following steps：
S1, tunnel advanced support：In such a way that steel tube shed plus self-feeding anchor pile front pre-grouting are reinforced；Steel tube shed 7 is adopted
It is 146mm with diameter, the P110 steel floral tube of wall thickness 9mm, injection within the scope of 120 ° of vault, circumferential center spacing is 300mm, extrapolation
Angle be 1~2 °, every loop number be 31, by 3 meters overlap joints, 7 slip casting of steel tube shed use the ratio of mud for 0.5~1.0 cement slurry
Single slurry, grouting pressure be 0.5~1.2MPa, mud jacking sequence from bottom to top, first two sides rear center, symmetrical mud jacking, grouting pressure
It is gradually increased by small, final pressure, injection speed and the holding for final pressure that slip casting should be controlled during slip casting press the time, during slip casting
Grouting pressure is observed at any time, analyzes slip casting situation, prevents blocking, running pulp, slip casting record is carried out, to analyze slip casting effect；
Self-feeding anchor pile uses diameter for the heat bundle seamless steel pipe of 32mm, wall thickness 4mm, length 2.2m, arranges within the scope of 120 ° of vault,
Spacing circumferential direction 0.3m × longitudinal direction 1.0m, outer limb are 10~15 °, and steel pipe tail end should be placed in steel arch-shelf abdomen, and slip casting is using water ash
Than 0.5~1.0 cement slurry, 0.3~0.5MPa of grouting pressure.
S2, preliminary bracing：Steel arch-shelf is arranged in loopful；I20a steel arch-shelf spacing 0.5m setting, diameter are the double steel bar of 8mm
Mesh sheet constitutes 150mm × 150mm grid, and the setting of loopful bilayer is respectively placed in inside and outside steel arch-shelf；Inside and outside diameter is set
For the longitudinally connected muscle of 22mm, longitudinally connected muscle circumferential direction spacing 1.0m；Gunite concrete uses C25P6 early strength concrete, and spray is mixed
With a thickness of 300mm, tunneling boring supporting, middle partition, interim inverted arch support thickness are 250mm；Lock foot anchoring stock uses R32S self-drilling
Foot anchor tube is locked, long 3.0m, is set to 1 steel arch-shelf girth joint of preliminary bracing and partial excavation base tunnel corner portion, longitudinal pitch are same
Steel arch-shelf longitudinal pitch, 120 ° of range built-in slip casting pipes of vault, spacing circumferential direction 2.0m × longitudinal direction 2.0m are in quincuncial arrangement, note
Slurry pipe uses diameter for the steel pipe of 32mm, wall thickness 3.5mm, length 0.8m.
S3, preliminary bracing hogback radial grouting are reinforced：In the early stage when supporting construction within the scope of 120 ° of vault the pre-buried spray of molten steel
Pipe makees Grouting Pipe, carries out grouting and reinforcing；The spray of molten steel pipe diameter is 42mm, wall thickness 3.5mm, length be 1 thickness of preliminary bracing+
0.5m, Grouting Pipe spacing circumferential direction 2.0m × longitudinal direction 2.0m, blossom type arrangement are right after preliminary bracing is closed cyclization 50m length
1 hogback grouting methol of preliminary bracing, the cement slurry ratio of mud are 0.5~1.0, and grouting pressure is 0.1~0.3Mpa, specifically by existing
Field determines still there is percolating water after the more location of underground water exposure, preliminary bracing backfill slip casting after excavation according to geology condition test
Location should regard concrete condition and carry out slip casting to lining cutting behind deeper country rock.
S4, face block and reinforce the front soil body：When Tunneling by mining method is excavated at plug wall, C25 is sprayed in time
Concrete enclosing face and built-in pipe canopy guide pipe；The concrete thickness of injection is 300mm, set in concrete the double-deck diameter as
The glass fiber-reinforced polymer of 12mm constitutes 150mm × 150mm grid, and connect with 1 grid of preliminary bracing, reserved when plug wall 6 is constructed
Injected hole, using injected hole to the 6 front soil body of plug wall carry out grouting and reinforcing, sealing, grouting and reinforcing use reinforcement measure and
Material cannot influence shield and pass through, and can use single slurry.
S5, Tunnel Second Lining：Under conditions of not tearing support open, the 200m thickness secondary lining that applies；
S6, shield driving section advance support：After completing secondary lining, set within the scope of 120 ° of end vault advanced big
Pipe canopy；The steel tube shed uses the P110 steel floral tube that diameter is 9mm for 146mm, wall thickness, circumferential center spacing 300mm injection
In hogback, outer limb is 1~2 °, and steel tube shed length is 20m, and steel tube shed slip casting uses 0.5~1.0 cement slurry list liquid of the ratio of mud
Slurry, grouting pressure are 0.5~1.2MPa.
S7, mortar backfill：After completing secondary lining and end daguanpeng construction, then removes temporary steel support and use
The plain-water slurry backfill for mixing appropriate swelling agent blocks the section 9m；
S8, guide table installation：C20 pea gravel concreten guide table, pre-buried installation steel plate and guide rail are poured in circular tunnel bottom；
S9, precipitation：Using constructing tunnel dewatering well, precipitation is carried out in advance before shield receives；
S10, shield receive：Shield is directly tunneled to be received in guide table by 9m backfill section, and backfill section uses shield duct piece
Assembly molding.
Claims (6)
1. shield method of reseptance in a kind of circle narrow-bore tunnel, it is characterised in that include the following steps：
S1, tunnel advanced support：In such a way that steel tube shed plus self-feeding anchor pile front pre-grouting are reinforced；
S2, preliminary bracing：Steel arch-shelf is arranged in loopful；
S3, preliminary bracing hogback radial grouting are reinforced：Pre-buried steel floral tube is made within the scope of 120 ° of vault when supporting construction in the early stage
Grouting Pipe carries out grouting and reinforcing；
S4, face block and reinforce the front soil body：When Tunneling by mining method is excavated at plug wall, C25 coagulation is sprayed in time
Grave closes face and built-in pipe canopy guide pipe；
S5, Tunnel Second Lining：Under conditions of not tearing support open, the 200m thickness secondary lining that applies；
S6, shield driving section advance support：After completing secondary lining, advanced big pipe is set within the scope of 120 ° of end vault
Canopy；
S7, mortar backfill：After completing secondary lining and end daguanpeng construction, then removes temporary steel support and use incorporation
The plain-water slurry backfill of appropriate swelling agent blocks the section 9m；
S8, guide table installation：C20 pea gravel concreten guide table, pre-buried installation steel plate and guide rail are poured in circular tunnel bottom；
S9, precipitation：Using constructing tunnel dewatering well, precipitation is carried out in advance before shield receives；
S10, shield receive：Shield is directly tunneled to be received in guide table by 9m backfill section, and backfill section uses shield segment assembling
Molding.
2. shield method of reseptance in a kind of round narrow-bore tunnel according to claim 1, it is characterised in that：The step
Suddenly S1 includes：Steel tube shed uses diameter for the P110 steel floral tube of 146mm, wall thickness 9mm, injection within the scope of 120 ° of vault, in circumferential direction
In the heart away from for 300mm, outer limb is 1~2 °, and every loop number is 31, by 3m overlap joint, steel tube shed slip casting use the ratio of mud for
0.5~1.0 cement single slurry, grouting pressure be 0.5~1.2MPa, mud jacking sequence from bottom to top, first two sides rear center, symmetrically
Mud jacking, grouting pressure are gradually increased by small；Self-feeding anchor pile uses diameter to prick seamless steel pipe, wall thickness 4mm, length for the heat of 32mm
It for 2.2m, is arranged within the scope of 120 ° of hogback, spacing circumferential direction 0.3m × longitudinal direction 1.0m, outer limb is 10~15 °, and steel pipe tail end should be set
In steel arch-shelf abdomen, slip casting uses 0.5~1.0 cement slurry of the ratio of mud, 0.3~0.5MPa of grouting pressure.
3. shield method of reseptance in a kind of round narrow-bore tunnel according to claim 1, it is characterised in that：The step
Suddenly S2 includes：Steel arch-shelf, I20a steel arch-shelf spacing 0.5m setting is arranged in loopful, and the double steel bar mesh sheet that diameter is 8mm is constituted
150mm × 150mm grid, loopful bilayer setting, is respectively placed in inside and outside steel arch-shelf；Inside and outside setting diameter be 22mm
Longitudinally connected muscle, longitudinally connected muscle circumferential direction spacing 1.0m；Gunite concrete uses C25P6 early strength concrete, spray it is mixed with a thickness of
300mm, tunneling boring supporting, middle partition, interim inverted arch support thickness are 250mm；Lock foot anchoring stock locks foot anchor using R32S self-drilling
Pipe, long 3.0m are set to the girth joint of preliminary bracing steel arch-shelf and partial excavation base tunnel corner portion, and longitudinal pitch is vertical with steel arch-shelf
To spacing, 120 ° of range built-in slip casting pipes of vault, spacing circumferential direction 2.0m × longitudinal direction 2.0m is in quincuncial arrangement, and Grouting Pipe uses
Diameter is the steel pipe of 32mm, wall thickness 3.5mm, length 0.8m.
4. shield method of reseptance in a kind of round narrow-bore tunnel according to claim 1, it is characterised in that：The step
Suddenly S3 includes：The spray of molten steel pipe diameter is 42mm, wall thickness 3.5mm, length are preliminary bracing thickness+0.5m, slip casting tube spacing
Circumferential 2.0m × longitudinal direction 2.0m, blossom type arrangement, after preliminary bracing is closed cyclization 50m length, to preliminary bracing hogback pressure
Cement injection, the cement slurry ratio of mud are 0.5~1.0, and grouting pressure is 0.1~0.3MPa.
5. shield method of reseptance in a kind of round narrow-bore tunnel according to claim 1, it is characterised in that：The step
Suddenly S4 includes：Spray C25 concrete enclosing face, the concrete thickness of injection is 300mm, set in concrete the double-deck diameter as
The glass fiber-reinforced polymer of 12mm constitutes 150mm × 150mm grid, and connect with preliminary bracing grid, reserved note when plug wall is constructed
Starch hole.
6. shield method of reseptance in a kind of round narrow-bore tunnel according to claim 1, it is characterised in that：The step
Suddenly S6 includes：The steel tube shed uses the P110 steel floral tube that diameter is 9mm for 146mm, wall thickness, circumferential center spacing 300mm
In hogback, outer limb is 1~2 ° for injection, and steel tube shed length is 20m, and steel tube shed slip casting uses 0.5~1.0 cement slurry list of the ratio of mud
Slurry, grouting pressure are 0.5~1.2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600751.5A CN108915702B (en) | 2018-06-12 | 2018-06-12 | Shield receiving method in circular small-section tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600751.5A CN108915702B (en) | 2018-06-12 | 2018-06-12 | Shield receiving method in circular small-section tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108915702A true CN108915702A (en) | 2018-11-30 |
| CN108915702B CN108915702B (en) | 2020-09-22 |
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| CN201810600751.5A Active CN108915702B (en) | 2018-06-12 | 2018-06-12 | Shield receiving method in circular small-section tunnel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792457A (en) * | 2019-10-12 | 2020-02-14 | 成都建工路桥建设有限公司 | Tunnel portal structure installation method for shield tunneling through mine tunnel |
| CN110985016A (en) * | 2019-12-16 | 2020-04-10 | 中铁一局集团有限公司 | Quick receiving method of shield machine suitable for hard rock stratum in mine tunnel |
| CN114135318A (en) * | 2021-12-06 | 2022-03-04 | 江西丰强科技发展有限公司 | Closely-adhered underpass tunnel lining structure and construction method thereof |
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| CN110792457A (en) * | 2019-10-12 | 2020-02-14 | 成都建工路桥建设有限公司 | Tunnel portal structure installation method for shield tunneling through mine tunnel |
| CN110985016A (en) * | 2019-12-16 | 2020-04-10 | 中铁一局集团有限公司 | Quick receiving method of shield machine suitable for hard rock stratum in mine tunnel |
| CN114135318A (en) * | 2021-12-06 | 2022-03-04 | 江西丰强科技发展有限公司 | Closely-adhered underpass tunnel lining structure and construction method thereof |
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|---|---|
| CN108915702B (en) | 2020-09-22 |
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