CN206942780U - A kind of tunnel cross mouth advance support structure - Google Patents
A kind of tunnel cross mouth advance support structure Download PDFInfo
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- CN206942780U CN206942780U CN201720531256.4U CN201720531256U CN206942780U CN 206942780 U CN206942780 U CN 206942780U CN 201720531256 U CN201720531256 U CN 201720531256U CN 206942780 U CN206942780 U CN 206942780U
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- support structure
- cross mouth
- ductule
- tunnel cross
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Abstract
It the utility model is related to constructing tunnel design field, disclose a kind of tunnel cross mouth advance support structure, include I-shaped steel frame, lock pin anchor tube, some advanced tubules, steel pipe cuff of putting more energy into, using rational ductule length, the lap of splice, injection angle, horizontal spacing and grouting parameter, it is easy in narrow and small Heng Dong spaces construction, the accurate injection precision and grouting quality for controlling ductule;Ductule is squeezed into before stresses re-distribution, and the effect of contraction of ductule provides a counter-force to country rock, so as to keep and strengthen the self-stable ability of country rock；Tunnel cross mouth advance support structure by rational design, in digging process, have good tension, shear behavior by the anchor force and ductule body of advanced tubule, increase the friction in strata structure face, the stabilization of country rock is strengthened, so as to efficiently control the sliding failure between stratification.
Description
Technical field
Constructing tunnel design field is the utility model is related to, particularly a kind of tunnel cross mouth advance support structure.
Background technology
Tunnel enters main tunnel construction using horizontal hole can increase working face, shorten the tunnel construction duration, rapid to play investment effect
Benefit, there is great social and economic benefit, wherein horizontal hole digs the skill that technology is also constructing tunnel with main tunnel intersection
Art emphasis and difficult point.Existing tunnel intersection digs the design of technology advance support, and there are the following problems：
1）Advance support a system engineering is not considered as；
2）Designed using the advance support of routine, bias toward and the reinforcement for not excavating part is designed, ignore the support of tail end
Design.
The content of the invention
The purpose of this utility model is to provide a kind of tunnel cross mouth advance support structure, to meet to increase construction working
Face, shorten the tunnel construction duration.
To surpass to realize above-mentioned technical purpose and the technique effect, the utility model discloses a kind of tunnel cross mouth
Preceding supporting construction, tunnel cross mouth are constructed using pilot tunnel method, are included I-shaped steel frame, lock pin anchor tube, some advanced small are led
Manage, steel pipe cuff of putting more energy into, pilot tunnel preliminary bracing uses I-shaped steel-frame structure, and I-shaped steel frame is using welding lock pin anchor tube with enclosing
Rock is connected firmly, and some advanced tubules are passed through using drilling out of I-shaped steel frame, and advanced tubule tail end, which is welded with, to be added
Strength steel pipe cuff.
Wherein, advanced tubule is using external diameter 42mm, thick 3.5mm hot rolled seamless steel tube, length of steel pipe 3m, ring spacing
40cm, longitudinal pitch 1.2m, advanced tubule tail end 60cm do not set injected hole.
Wherein, advanced tubule tail end welding external diameter 50mm, thick 4mm steel pipe cuff of putting more energy into.
Wherein, advanced tubule tail end utilizes diameter phi 8mm reinforcing bar and I-steel frame welding, reinforcing bar and steel pipe of putting more energy into
Cuff, advanced tubule and I-shaped steel frame are used and are welded to connect.
The utility model has the advantages that：
1. the utility model is by Optimal Structure Designing, using rational ductule length, the lap of splice, injection angle,
Horizontal spacing and grouting parameter, it is easy in narrow and small Heng Dong spaces construction, the accurate injection precision for controlling ductule and slip casting
Quality;Ductule is squeezed into before stresses re-distribution, and the effect of contraction of ductule provides a counter-force to country rock, so as to protect
Hold and strengthen the self-stable ability of country rock.
2. by the tunnel cross mouth advance support structure rationally designed, in digging process, pass through advanced tubule
Anchor force and ductule body have good tension, shear behavior, increase the friction in strata structure face, strengthen the steady of country rock
It is fixed, so as to efficiently control the sliding failure between stratification.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is advanced tubule structural representation of the present utility model.
Fig. 3 is the connection figure of advanced tubule of the present utility model and I-shaped steel frame.
Fig. 4 is that advanced tubule of the present utility model is longitudinally arranged figure.
Critical piece symbol description:
1：I-shaped steel frame, 2：Lock pin anchor tube, 3：Advanced tubule, 4：Put more energy into steel pipe cuff.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.
As Figure 1-4, the utility model discloses a kind of tunnel cross mouth advance support structure, it is by I-shaped steel frame
1st, pin anchor tube 2, some advanced tubules 3, steel pipe cuff 4 of putting more energy into is locked to form.
Pilot tunnel preliminary bracing uses the structure of I-shaped steel frame 1, and I-shaped steel frame 1 is connected using welding lock pin anchor tube 2 with country rock
Connect firmly, some advanced tubules 3 are passed through using drilling out of I-shaped steel frame 1, and the tail end of advanced tubule 3, which is welded with, puts more energy into
Steel pipe cuff 4.
Advanced tubule 3 is using external diameter 42mm, thick 3.5mm hot rolled seamless steel tube, length of steel pipe 3m, ring spacing
40cm, longitudinal pitch 1.2m, the tail end 60cm of advanced tubule 3 do not set injected hole.The tail end of advanced tubule 3 welding external diameter 50mm,
Thick 4mm steel pipe cuff 4 of putting more energy into.The tail end of advanced tubule 3 is welded using diameter phi 8mm reinforcing bar with I-shaped steel frame 1, reinforcing bar
Use and be welded to connect with steel pipe cuff 4 of putting more energy into, advanced tubule 3 and I-shaped steel frame 1.
Design principle：
I-shaped steel frame 1 is Tunnel stress main component, forms overall stress with gunite concrete, constrains tunnel
The deformation of the soil body is excavated on road periphery, and lock pin anchor tube 2 refers to after excavating completion erection steel arch-shelf, and the work that its foot is fixed is main
It is the rigid body displacement for limiting steel arch-shelf as far as possible to act on, and it is undertaken pressure caused by surrouding rock deformation as early as possible, ensures tunnel
The stability of preliminary bracing, advanced tubule 3 be mainly used in from short fractured weak zone of steady time, Shallow Section, hole biased segment,
The pre support in the locations such as fault belt.Steel pipe cuff 4 of putting more energy into is welded on the tail end of advanced tubule 3, steel pipe cuff external diameter 50mm,
Thick 4mm, mainly for improving the rigidity of force structure.The slip casting of advanced tubule 3 uses cement grout, the ratio of mud 1：1（Weight
Than）, 0.5~1.0mpa of grouting pressure.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.
Claims (4)
1. a kind of tunnel cross mouth advance support structure, described tunnel cross mouth is constructed using pilot tunnel method, it is characterised in that bag
I-shaped steel frame, lock pin anchor tube, some advanced tubules, steel pipe cuff of putting more energy into are included, described pilot tunnel preliminary bracing uses
I-shaped steel-frame structure, I-shaped steel frame are connected firmly using welding lock pin anchor tube with country rock, described some advanced small to lead
Pipe is passed through using drilling out of I-shaped steel frame, and described advanced tubule tail end is welded with steel pipe cuff of putting more energy into.
A kind of 2. tunnel cross mouth advance support structure as claimed in claim 1, it is characterised in that：Described advanced tubule
Using external diameter 42mm, thick 3.5mm hot rolled seamless steel tube, length of steel pipe 3m, ring spacing 40cm, longitudinal pitch 1.2m, in advance
The length that ductule tail end has 60cm does not set injected hole.
A kind of 3. tunnel cross mouth advance support structure as claimed in claim 1 or 2, it is characterised in that：Described is advanced small
Tail end of conduit welding external diameter 50mm, thick 4mm steel pipe cuff of putting more energy into.
A kind of 4. tunnel cross mouth advance support structure as claimed in claim 3, it is characterised in that：Described advanced tubule
Tail end utilizes diameter phi 8mm reinforcing bar and I-steel frame welding, reinforcing bar and put more energy into steel pipe cuff, advanced tubule and I-shaped
Steel frame is used and is welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720531256.4U CN206942780U (en) | 2017-05-15 | 2017-05-15 | A kind of tunnel cross mouth advance support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720531256.4U CN206942780U (en) | 2017-05-15 | 2017-05-15 | A kind of tunnel cross mouth advance support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206942780U true CN206942780U (en) | 2018-01-30 |
Family
ID=61361243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720531256.4U Active CN206942780U (en) | 2017-05-15 | 2017-05-15 | A kind of tunnel cross mouth advance support structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN206942780U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343453A (en) * | 2018-03-27 | 2018-07-31 | 中铁十六局集团第三工程有限公司 | A kind of cooperation tunnel weak surrounding rock location advance support bracing members stiffening device |
| CN110939467A (en) * | 2019-12-31 | 2020-03-31 | 中铁大桥局集团有限公司 | Novel tunnel advanced small conduit, advanced support system and construction method |
-
2017
- 2017-05-15 CN CN201720531256.4U patent/CN206942780U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343453A (en) * | 2018-03-27 | 2018-07-31 | 中铁十六局集团第三工程有限公司 | A kind of cooperation tunnel weak surrounding rock location advance support bracing members stiffening device |
| CN110939467A (en) * | 2019-12-31 | 2020-03-31 | 中铁大桥局集团有限公司 | Novel tunnel advanced small conduit, advanced support system and construction method |
| CN110939467B (en) * | 2019-12-31 | 2024-08-27 | 中铁大桥局集团有限公司 | Tunnel advance small guide pipe, advance support system and construction method |
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