CN209339958U - A kind of bored tunnel duck eye is into big hole pre-add solid system - Google Patents
A kind of bored tunnel duck eye is into big hole pre-add solid system Download PDFInfo
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- CN209339958U CN209339958U CN201821844358.2U CN201821844358U CN209339958U CN 209339958 U CN209339958 U CN 209339958U CN 201821844358 U CN201821844358 U CN 201821844358U CN 209339958 U CN209339958 U CN 209339958U
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- tunnel
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- duck eye
- big hole
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Abstract
The utility model relates to a kind of bored tunnel duck eyes into big hole pre-add solid system, positioned at tunnel duck eye at the variable cross-section in big hole, including steel tube shed, advanced tubule and deep hole grouting pipe；Steel tube shed is set into stratum from narrow-bore tunnel face vault to large cross-section tunnel vault formation volumes, and grouting and reinforcing surrounding formation；Advanced tubule is set into stratum from narrow-bore tunnel vault to tunnel variable cross-section formation volumes, and grouting and reinforcing tunnel variable cross-section node stratum；Deep hole grouting pipe is set from narrow-bore tunnel face variable cross-section into stratum to large cross-section tunnel hole top and barrel formation volumes, and grouting and reinforcing surrounding formation.After shaping structures, the correlation function requirement of general formation tunnel duck eye into big hole can be met, ensure tunnel duck eye into big hole safe construction, while it is smaller to increase influence of the stratum consolidation area to ground and surrounding Important building, solves the problems, such as that tunnel duck eye is difficult into the construction of big hole, effect is poor.
Description
Technical field
The utility model belongs to tunnel construction technical field, and in particular to a kind of bored tunnel duck eye is into big hole pre-add solid
System.
Background technique
Tunnel is widely used in Urban Underground subway engineering, in Urban Metro Construction, often needs to meet different majors
Expand tunnel cross-section under it is required that in tunnel, therefore inevitably tunnel will will appear duck eye into big hole phenomenon.
It generally requires to carry out advance reinforcement to stratum at variable cross-section when bored tunnel duck eye is into big hole, to reduce tunnel duck eye
It is conventional using method is locally digged at variable cross-section into big hole construction safety, take steel mesh+jetting cement support form to be easy
The security risk of construction period is caused, or makes special-shaped steelframe；Secondly the construction of later-stage secondary lining cutting increases construction investment.Therefore
When constructing for bored tunnel duck eye into big hole, effectively reinforce that more stringent requirements are proposed to construction method and stratum.
Summary of the invention
The purpose of the utility model is to provide a kind of bored tunnel duck eyes into big hole pre-add solid system, and it is small to change conventional tunnel
Hole performs mode into great Dong, it is ensured that tunnel duck eye is into big hole safe construction.
The technology employed by the present utility model is
A kind of bored tunnel duck eye is into big hole pre-add solid system, it is characterised in that:
Positioned at tunnel duck eye at the variable cross-section in big hole, including steel tube shed, advanced tubule and deep hole grouting pipe；
Steel tube shed is set into stratum from narrow-bore tunnel face vault to large cross-section tunnel vault formation volumes, and is infused
Slurry reinforces surrounding formation；
Advanced tubule is set into stratum from narrow-bore tunnel vault to tunnel variable cross-section formation volumes, and grouting and reinforcing
Tunnel variable cross-section node stratum；
Deep hole grouting pipe is set into stratum from narrow-bore tunnel face variable cross-section to large cross-section tunnel Dong Ding and hole
Body formation volumes, and grouting and reinforcing surrounding formation.
Steel tube shed and advanced tubule are slip casting steel floral tube；Deep hole grouting pipe is slip casting pvc pipe.
Steel tube shed equidistantly covers large cross-section tunnel arch range.
The steelframe of steel tube shed and the first support system in tunnel is welded and fixed.
Advanced tubule equidistantly covers narrow-bore tunnel arch range.
The steelframe of advanced tubule and the first support system in tunnel is welded and fixed.
Advanced tubule and steel tube shed stabilization zone are engaged.
Deep hole grouting pipe is set with spacing 500-800mm.
Deep hole grouting pipe and steel tube shed stabilization zone, advanced tubule stabilization zone are engaged.
The utility model has the advantage that
The utility model is at tunnel variable cross-section, setting pipe canopy, ductule and deep hole grouting pre-add solid system.As needed
It is flexible to determine reinforcing scope, it can be according to needing strengthening stratum condition to determine pipe canopy length and deep hole grouting range, it can be to pipe canopy quantity
And set angle, horizontal space makes appropriate adjustment；It needs effectively to be welded steel tube shed and first subsystem steelframe after tube shed grouting
It connects, to reinforce just subsystem structure；Advanced tubule, deep hole grouting slurry, which are reinforced, combines the synergy of pipe canopy, guarantees that stratum is steady
It is fixed, it is ensured that tunnel duck eye is into big hole safe construction.Not only facilitate constructing operation, goes back cost saving；It not only can be effective
Strengthening stratum is also smaller to surrounding environment influence.
After the utility model shaping structures, the correlation function requirement of general formation tunnel duck eye into big hole can be met, it is ensured that
Tunnel duck eye is into big hole safe construction, while it is smaller to increase influence of the stratum consolidation area to ground and surrounding Important building.So
Just solve the problems, such as that tunnel duck eye is difficult into the construction of big hole, effect is poor, in construction fields such as Hydraulic Tunnel, urban subway tunnels
Have a wide range of applications.
Detailed description of the invention
Fig. 1 is tunnel just branch structure and Guan Peng, ductule, deep hole grouting pipe (cross section) schematic diagram.
Fig. 2 is tunnel just branch structure and Guan Peng, ductule, deep hole grouting pipe (vertical section) schematic diagram.
In figure, 1- steel tube shed, 2- advanced tubule, 3- deep hole grouting pipe, the first support system in the tunnel 4-.
Specific embodiment
The utility model is described in detail With reference to embodiment.
It is conventional using the part expansion digging method at variable cross-section when bored tunnel duck eye is into big hole, take steel mesh+jetting cement
Support form be easy to cause the security risk of construction period, or makes special-shaped steelframe；Secondly later-stage secondary lining cutting need to expend largely
Armored concrete.
The utility model reinforces stratum using pipe canopy, advanced tubule and deep hole grouting, increases the reinforcing on stratum
Range, and then reduce the influence to surrounding building and environment.It is pre- in advance that the utility model takes full advantage of pipe canopy, deep hole grouting
The reliability of reinforcing, not only convenient construction, reduce investment outlay, evaded construction risk, and be also greatly reduced face over the ground and its
The influence of periphery construction of structures.
Bored tunnel duck eye involved in the utility model is into big hole pre-add solid system specific structure are as follows: steel tube shed 1 passes through
Steel tube shed 1, which is performed, in tunnel vault carries out grouting and reinforcing；Advanced tubule 2, by tunnel vault perform advanced tubule 2 into
Row grouting and reinforcing；Deep hole grouting system, by tunnel variable cross-section face perform pvc pipe and carry out grouting and reinforcing and steel tube shed
1 and 2 stabilization zone of advanced tubule be engaged；
Wherein, steel tube shed 1, advanced tubule 2 and steelframe in preliminary bracing system are welded；Steel tube shed 1 advanced small is led
The degree of skewness of pipe canopy should be often measured in 3 drilling process of pipe 2 and deep hole grouting pipe using horizontal inclinometer, discovery deviant exceeds
When design requirement, it should rectify a deviation in time；1 steel pipe of steel tube shed uses Φ 108mm, the seamless steel pipe of wall thickness 6mm, merogenesis installation.Slip casting
Injected hole is bored on pipe, injected hole is bored on slip casting steel pipe, and aperture Φ 10mm, pitch of holes 200mm are arranged in blossom type.Aperture slip casting
Slurries use cement mortar, just intend parameter: cement slurry ratio of mud 0.8:1~1:1, grouting pressure: being constructed using 0.2~0.4MPa
In should factually border geological condition, and related construction parameter is determined by test.
The installation opportunity of steel tube shed 1 needs while narrow-bore tunnel Shed-pipe Advanced Support is reinforced to large cross-section tunnel arch model
Enclose realization pre-reinforcement；The steel tube shed need to equidistantly cover large cross-section tunnel arch range: needed after slip casting by steel tube shed and just
Subsystem steelframe is effectively welded, to reinforce just subsystem structure.
The construction of advanced tubule 2 need to set after narrow-bore tunnel daguanpeng construction according to face to headwall distance super
At preceding ductule to tunnel variable cross-section, and grouting and reinforcing surrounding formation, stabilization zone need to be engaged with the stabilization zone Guan Peng, it is ensured that tunnel becomes
Section construction safety.The advanced tubule need to equidistantly cover narrow-bore tunnel arch range: be needed after slip casting by steel tube shed
It is effectively welded with first subsystem steelframe, to reinforce just subsystem structure.
The installation opportunity of deep hole grouting pipe 3 needs after the completion of narrow-bore tunnel is constructed, according to formation condition in light section
Tunnel tunnel face sets deep hole grouting Guan Yuguan canopy stabilization zone, the occlusion of advanced tubule stabilization zone ensures that stratum is stablized at variable cross-section
And large cross-section tunnel is safe into hole.
Concrete construction method is as follows:
Step 1: narrow-bore tunnel excavation performs tunnel just support system 4；According to large cross-section tunnel apart from face distance
And steel tube shed 1 sets angle and determines that steel tube shed 1 performs position；
Step 2: in narrow-bore tunnel, vault position drilling appropriate performs steel tube shed 1, is set greatly with 1 °~2 ° outer limbs
Pipe canopy 1,1 steel pipe of steel tube shed use Φ 108mm, the seamless steel pipe of wall thickness 6mm, merogenesis installation；The slip casting into pipe, steel tube shed 1 surpass
After the completion of preceding grouting and reinforcing, continues excavation face and welded in the vertical product steelframe in 1 place of performing of steel tube shed with steel tube shed 1；
Step 3: in narrow-bore tunnel, vault position drilling appropriate performs advanced tubule 2, is beaten with 1 °~2 ° outer limbs
It sets if setting to tunnel variable cross-section；After the completion of 2 grouting and reinforcing of advanced tubule, continue to excavate face in advanced tubule 2
It founds a product steelframe and is welded with advanced tubule 2 in the place of performing；
Step 4: constructing in narrow-bore tunnel to variable cross-section, sets deep hole grouting pipe 3 according to formation condition and slip casting adds
Gu being engaged with steel tube shed 1,2 reinforcing scope of advanced tubule, it is ensured that large cross-section tunnel is safe into hole.
It is big into big hole construction risk that this bored tunnel duck eye into big hole pre-add solid system solves tunnel duck eye, and construction is tired
Disadvantage difficult, investment is big.Ensure large cross-section tunnel into hole safety, to reduce by the reinforcement system that injecting cement paste and pipe canopy are formed
Engineering risk.
The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are practical new by reading this
Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model
Cover.
Claims (9)
1. a kind of bored tunnel duck eye is into big hole pre-add solid system, it is characterised in that:
Positioned at tunnel duck eye at the variable cross-section in big hole, including steel tube shed (1), advanced tubule (2) and deep hole grouting pipe (3)；
Steel tube shed (1) is set into stratum from narrow-bore tunnel face vault to large cross-section tunnel vault formation volumes, and is infused
Slurry reinforces surrounding formation；
Advanced tubule (2) is set into stratum from narrow-bore tunnel vault to tunnel variable cross-section formation volumes, and grouting and reinforcing
Tunnel variable cross-section node stratum；
Deep hole grouting pipe (3) is set from narrow-bore tunnel face variable cross-section into stratum to large cross-section tunnel hole top and barrel
Formation volumes, and grouting and reinforcing surrounding formation.
2. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Steel tube shed (1) and advanced tubule (2) are slip casting steel floral tube；Deep hole grouting pipe (3) is slip casting pvc pipe.
3. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Steel tube shed (1) equidistantly covers large cross-section tunnel arch range.
4. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Steel tube shed (1) and the steelframe of the first support system (4) in tunnel are welded and fixed.
5. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Advanced tubule (2) equidistantly covers narrow-bore tunnel arch range.
6. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Advanced tubule (2) and the steelframe of the first support system (4) in tunnel are welded and fixed.
7. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Advanced tubule (2) and steel tube shed (1) stabilization zone are engaged.
8. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Deep hole grouting pipe (3) is set with spacing 500-800mm.
9. a kind of bored tunnel duck eye according to claim 1 is into big hole pre-add solid system, it is characterised in that:
Deep hole grouting pipe (3) and steel tube shed (1) stabilization zone, advanced tubule (2) stabilization zone are engaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821844358.2U CN209339958U (en) | 2018-11-09 | 2018-11-09 | A kind of bored tunnel duck eye is into big hole pre-add solid system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821844358.2U CN209339958U (en) | 2018-11-09 | 2018-11-09 | A kind of bored tunnel duck eye is into big hole pre-add solid system |
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| CN209339958U true CN209339958U (en) | 2019-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253138A (en) * | 2020-11-03 | 2021-01-22 | 中铁隆工程集团有限公司 | Construction method for excavation of small section of subway tunnel into large section by variable section |
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2018
- 2018-11-09 CN CN201821844358.2U patent/CN209339958U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253138A (en) * | 2020-11-03 | 2021-01-22 | 中铁隆工程集团有限公司 | Construction method for excavation of small section of subway tunnel into large section by variable section |
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