CN203271786U - Advanced support structure for tunnel excavation - Google Patents
Advanced support structure for tunnel excavation Download PDFInfo
- Publication number
- CN203271786U CN203271786U CN 201320094873 CN201320094873U CN203271786U CN 203271786 U CN203271786 U CN 203271786U CN 201320094873 CN201320094873 CN 201320094873 CN 201320094873 U CN201320094873 U CN 201320094873U CN 203271786 U CN203271786 U CN 203271786U
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- tunnel
- support structure
- tunnel excavation
- anchor pole
- advance support
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Abstract
The utility model discloses an advanced support structure for tunnel excavation. The advanced support structure comprises a tunnel section, a pipe shed, anchor rods and an arched steel frame, wherein the anchor rods are divided into anchor sections and free sections, the anchor sections of the anchor rods are fixed in surrounding rock at the outer outline of the tunnel section along longitudinal outward drill holes of a tunnel, the free sections of the anchor rods are fixed on the arched steel frame through anchor seats on the end parts, the pipe shed and the anchor rods are arranged adjacently, one end of the pipe shed is fixed in the surrounding rock at the outer outline of the tunnel section, and the other end of the pipe shed is fixed on the arched steel frame. With the adoption of the advanced support structure for tunnel excavation, the self strength of the surrounding rock in a deep stratum can be effectively used, and effective advanced support treatment before tunnel excavation can be carried out, and collapse accidents during tunnel excavation at a seriously damaged rock stratum or a stratum with more stratification can be avoided.
Description
Technical field
The utility model relates to the lining with building material of shield tunnel, especially is applicable to the more or advance support structure of broken serious rock stratum tunnel excavation of bedding.
Background technology
When carrying out tunnel excavation, tunneling in especially more in bedding or broken rock need to be carried out advance support and reinforce, the destruction in order to avoid the tunnel caves in.mainly take at present advanced tubule reinforcing and bassoon canopy reinforcement measure to carry out on engineering, ductule is applicable to formation condition good rock stratum, because self rigidity is less, strengthening length is limited, the rock stratum relatively poor for the stratum do not have reinforcement effect, bassoon canopy reinforcement measure is than advanced tubule reinforcement measure, rigidity and strengthening length all increase to some extent, but still can not effectively utilize the intensity of deep-level country rock self, more or the location that crushing rock formation is serious for bedding, still do not satisfy the requirement of strength of on engineering, tunnel surrounding being reinforced, the Tunnel Landslide that causes happens occasionally.
The utility model content
Technical problem to be solved in the utility model is in order effectively to utilize the intensity of deep-level country rock self, effectively carrying out advance support before tunnel excavation processes, avoid the especially more or broken serious rock stratum tunnel excavation generation cave in accident of bedding of tunnel, a kind of tunnel excavation advance support structure is provided.
The utility model is achieved by following technical proposals:
A kind of tunnel excavation advance support structure, comprise tunnel cross-section and Guan Peng, also comprise anchor pole and arch-shaped steel frame, wherein said anchor pole is divided into anchoring section and free segment, vertical outside boring is fixed in the country rock at tunnel cross-section outer contour place described anchoring section along the tunnel, the anchoring part that described free segment arranges by the end is fixed on described arch-shaped steel frame, the setting adjacent with described anchor pole of described pipe canopy, one end of described pipe canopy is fixed in the country rock at tunnel cross-section outer contour place, and the other end is fixed on described arch-shaped steel frame.
In technique scheme, between described anchor pole and described country rock, fix by plain concrete or the steel concrete of mortar, fines between described pipe canopy and described country rock.
Described pipe canopy is hollow steel pipe, is scattered with on tube wall to ooze to starch the hole, and described pipe canopy pipe is interior, pipe canopy pipe is outer is integral by packing material and described country rock.
Described packing material is plain concrete or the steel concrete of mortar, fines.
The camber angle of described pipe canopy is less than the camber angle of anchor pole.
The camber angle of described pipe canopy is 3-5 °.
The camber angle of described anchor pole is 15-25 °.
Described ooze the slurry hole arrangement be quincunx or column-row arrangement.
Compared with prior art, the beneficial effects of the utility model are: 1, increased anchor pole in tunnel excavation advance support structure, the intensity that can effectively utilize deep-level country rock self provides anchored force for the rock stratum of tunnel excavation section part, increases stability and the intensity of tunnel surrounding.2, having poured into the packing materials such as mortar in the pipe canopy has effectively increased the strength and stiffness of managing canopy, has reduced the distortion of tunnel surrounding, has increased the intensity of the integral body in tunnel.3, increased arch-shaped steel frame, support anchors and Guan Peng, prevent that anchor pole and Guan Peng from exposing an end downward displacement occurs on the one hand, and fixing anchor bar and Guan Peng, prevent that anchor pole and pipe canopy from dislocation occuring and rotate on the other hand, thus the country rock of further Strengthening Tunnel section.
Description of drawings
Fig. 1 is the structural representation of the utility model tunnel excavation advance support structure;
Fig. 2 is the structural representation of pipe canopy in Fig. 1;
Fig. 3 is the structural representation of anchor pole in Fig. 1.
In figure, 1 arch-shaped steel frame, 2 the pipe canopies, 3 anchor poles, 4 tunnel cross-sections, 5 mortars, 21 steel pipes, 22 ooze the slurry hole, 31 anchoring sections, 32 free segments, 33 anchoring parts
The specific embodiment
Below in conjunction with Figure of description, the utility model is described in further detail:
As Figure 1-3, the utility model tunnel excavation advance support structure comprises arch-shaped steel frame 1, pipe canopy 2, anchor pole 3, tunnel cross-section 4, and wherein anchor pole 3 is divided into anchoring section 31 and free segment 32, and the end of free segment 32 is provided with anchoring part 33 (as Fig. 2).One end of the anchoring section 31 of anchor pole 3, pipe canopy 2 steel pipes 21 along along the tunnel vertically outside boring insert and use mortar 5 to be fixed in the country rock at tunnel cross-section 4 outer contour places, wherein managing the boron steel tube pitch is 400-500mm along arc length, with the anchor pole spacing be 50-80mm along arc length, in this example, pipe boron steel tube pitch is 450mm along arc length, with the anchor pole spacing be 65mm along arc length.The camber angle of preferred pipe canopy 2 is less than the camber angle of anchor pole 3, and the camber angle of wherein managing canopy is 3-5 °, and the camber angle of anchor pole is 15-25 °, in this example, is respectively 4 °, 20 °.The end of the free segment 32 of anchor pole is welded and fixed by anchoring part 33 and arch-shaped steel frame 1, and the other end (being free bared end) of pipe canopy 2 is welded and fixed with arch-shaped steel frame 1.In above-mentioned tunnel excavation advance support structure, in the pipe of pipe canopy 2, between the country rock of pipe canopy 2 and tunnel cross-section 4, all be filled with mortar 5 between the country rock of anchor pole 3 and tunnel cross-section 4, by high pressure pouring mortar 5, make arch-shaped steel frame 1, pipe canopy 2, anchor pole 3 be connected with tunnel cross-section to connect in aggregates, i.e. tunnel excavation advance support structure.When mortar 5 intensity of fixing anchor bar 3 and pipe canopy 2 reach 75%, just can carry out the excavation of tunnel cross-section.
In technique scheme, this pipe canopy 2 is preferably hollow steel pipe, be scattered with on preferred tube wall to ooze slurry hole 22, by the high pressure pouring mortar make in pipe canopy pipe, pipe is outer and the tunnel cross-section country rock is integral.Wherein ooze the arrangement of starching the hole and preferably be quincunx or column-row arrangement.Mortar in technique scheme can also with the plain concrete of fines or, the packing material such as steel concrete substitutes.
In the utility model, the effect of arch-shaped steel frame is support anchors and Guan Peng on the one hand, prevents that anchor pole and Guan Peng from exposing an end downward displacement occurs, and is fixing anchor bar and Guan Peng on the other hand, prevents that anchor pole and pipe canopy from dislocation occuring and rotate; The pipe canopy effect be with mortar by ooze the slurry hole ooze in bedding gap or broken rock, tunnel surrounding is carried out reinforcement; The effect of anchor pole is namely to improve the bulk strength of country rock by the inclined hole grouting reinforcement rock on the one hand, effect on the other hand is that anchor pole self inserts in deep-level country rock, the intensity of utilizing deep-level country rock self provides anchored force for the rock stratum of tunnel excavation section part, increases stability and the intensity of tunnel surrounding.Combination by above-mentioned parts, the utility model tunnel excavation advance support structure can effectively be utilized the intensity of deep-level country rock self, effectively carry out advance support and process before tunnel excavation, avoid the especially more or broken serious rock stratum tunnel excavation generation cave in accident of bedding of tunnel.
Schematically illustrate above description of the present utility model is belonged to.For persons skilled in the art; can be according to the description of present embodiment; may make some change to structure or layout type; only otherwise break away from design aim of the present utility model; all apparent changes and the similar Design with equivalent substitution are within all being included in protection domain of the present utility model.
Claims (7)
1. tunnel excavation advance support structure, comprise tunnel cross-section and Guan Peng, it is characterized in that, also comprise anchor pole and arch-shaped steel frame, wherein said anchor pole is divided into anchoring section and free segment, vertical outside boring is fixed in the country rock at tunnel cross-section outer contour place described anchoring section along the tunnel, the anchoring part that described free segment arranges by the end is fixed on described arch-shaped steel frame, the setting adjacent with described anchor pole of described pipe canopy, one end of described pipe canopy is fixed in the country rock at tunnel cross-section outer contour place, and the other end is fixed on described arch-shaped steel frame.
2. tunnel excavation advance support structure according to claim 1, is characterized in that, between described anchor pole and described country rock, fix by mortar, plain concrete or steel concrete between described pipe canopy and described country rock.
3. tunnel excavation advance support structure according to claim 1, is characterized in that, described pipe canopy is hollow steel pipe, is scattered with on tube wall to ooze to starch the hole, and described pipe canopy pipe is interior, pipe canopy pipe is outer is integral by packing material and described country rock.
4. tunnel excavation advance support structure according to claim 3, is characterized in that, described packing material is mortar, plain concrete or steel concrete.
5. tunnel excavation advance support structure according to claim 1, is characterized in that, the camber angle of described pipe canopy is less than the camber angle of anchor pole.
6. tunnel excavation advance support structure according to claim 5, is characterized in that, the camber angle of described pipe canopy is 3-5 °.
7. tunnel excavation advance support structure according to claim 5, is characterized in that, the camber angle of described anchor pole is 15-25 °.
8. tunnel excavation advance support structure according to claim 3, it is characterized in that, described ooze the slurry hole arrangement be quincunx or column-row arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320094873 CN203271786U (en) | 2013-03-01 | 2013-03-01 | Advanced support structure for tunnel excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320094873 CN203271786U (en) | 2013-03-01 | 2013-03-01 | Advanced support structure for tunnel excavation |
Publications (1)
| Publication Number | Publication Date |
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| CN203271786U true CN203271786U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320094873 Expired - Fee Related CN203271786U (en) | 2013-03-01 | 2013-03-01 | Advanced support structure for tunnel excavation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575242A (en) * | 2017-09-25 | 2018-01-12 | 许生安 | A kind of tunnel structure of high-strength anti-seismic |
| CN108612543A (en) * | 2018-04-13 | 2018-10-02 | 山东里能鲁西矿业有限公司 | A kind of combined type advance support structural approach |
| CN109372520A (en) * | 2018-11-08 | 2019-02-22 | 大成工程建设集团有限公司 | One kind passing through Debris Flow Deposition area tunnel support structure and its construction method |
| CN110057517A (en) * | 2019-05-21 | 2019-07-26 | 平潭综合实验区交通投资集团有限公司 | The lead pipe-shed support structure of its own vertical deflection can be measured by inclinometer |
| CN110410082A (en) * | 2019-07-29 | 2019-11-05 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel excavation advanced support method |
-
2013
- 2013-03-01 CN CN 201320094873 patent/CN203271786U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575242A (en) * | 2017-09-25 | 2018-01-12 | 许生安 | A kind of tunnel structure of high-strength anti-seismic |
| CN108612543A (en) * | 2018-04-13 | 2018-10-02 | 山东里能鲁西矿业有限公司 | A kind of combined type advance support structural approach |
| CN109372520A (en) * | 2018-11-08 | 2019-02-22 | 大成工程建设集团有限公司 | One kind passing through Debris Flow Deposition area tunnel support structure and its construction method |
| CN110057517A (en) * | 2019-05-21 | 2019-07-26 | 平潭综合实验区交通投资集团有限公司 | The lead pipe-shed support structure of its own vertical deflection can be measured by inclinometer |
| CN110410082A (en) * | 2019-07-29 | 2019-11-05 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel excavation advanced support method |
| CN110410082B (en) * | 2019-07-29 | 2021-07-20 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel excavation advance support method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20190301 |
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| CF01 | Termination of patent right due to non-payment of annual fee |