AU2021104669A4 - A method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel - Google Patents
A method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel Download PDFInfo
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- AU2021104669A4 AU2021104669A4 AU2021104669A AU2021104669A AU2021104669A4 AU 2021104669 A4 AU2021104669 A4 AU 2021104669A4 AU 2021104669 A AU2021104669 A AU 2021104669A AU 2021104669 A AU2021104669 A AU 2021104669A AU 2021104669 A4 AU2021104669 A4 AU 2021104669A4
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- Australia
- Prior art keywords
- surrounding rock
- tunnel
- box girder
- universal beam
- anchor cable
- Prior art date
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Links
- 238000000034 method Methods 0.000 title abstract description 22
- 239000011435 rock Substances 0.000 abstract description 30
- 238000010276 construction Methods 0.000 abstract description 12
- 238000009412 basement excavation Methods 0.000 abstract description 9
- 239000004568 cement Substances 0.000 abstract description 8
- 239000002002 slurry Substances 0.000 abstract description 7
- -1 Sulphur aluminate Chemical class 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000005864 Sulphur Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 26
- 239000010959 steel Substances 0.000 description 26
- 239000011378 shotcrete Substances 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur 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
- E21D11/14—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
- 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
- E21D11/006—Lining anchored in the rock
-
- 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
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
IAD 3 1AXNI
The invention discloses a method of 30m long anchor cable supporting universal beam box
girder arch frame at the side of severe deformation under bias pressure and radial grouting
behind the initial support of high-speed railway double-track tunnel, which relates to the
technical field of tunnel construction, using universal beam box girder instead of ordinary
universal beam to enhance the support strength. Anchor cable is used to strengthen the support to
resist the large deformation of surrounding rock caused by shallow buried bias pressure and
compression tunnel. The initial support radial back grouting can consolidate the surrounding
rock outside the tunnel, increase the anti-deformation ability of surrounding rock, improve the
stability of surrounding rock during excavation and ensure the safety of operation. The thickness
and time of self-stabilization of surrounding rock should be increased, and the strength of
primary support structure should be increased, so that the initial support should bear 70% ~ 90%
of the stress of surrounding rock, and the secondary lining should bear 10% ~ 30% of the stress
of surrounding rock. Sulphur aluminate cement single liquid slurry with fast hardening and
micro expansion is used in the slurry, which has a good effect on the geology of carbonaceous
shale.
1JA1U VV 1N u
I
43
FIG. 1
5 -7
6
FIG. 2
1
Description
IAD 3 1AXNI
The invention discloses a method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel, which relates to the technical field of tunnel construction, using universal beam box girder instead of ordinary universal beam to enhance the support strength. Anchor cable is used to strengthen the support to resist the large deformation of surrounding rock caused by shallow buried bias pressure and compression tunnel. The initial support radial back grouting can consolidate the surrounding rock outside the tunnel, increase the anti-deformation ability of surrounding rock, improve the stability of surrounding rock during excavation and ensure the safety of operation. The thickness and time of self-stabilization of surrounding rock should be increased, and the strength of primary support structure should be increased, so that the initial support should bear 70% ~ 90% of the stress of surrounding rock, and the secondary lining should bear 10% ~ 30% of the stress of surrounding rock. Sulphur aluminate cement single liquid slurry with fast hardening and micro expansion is used in the slurry, which has a good effect on the geology of carbonaceous shale.
1JA1U VV 1N u
43
FIG. 1
5 -7 6
FIG. 2
A METHOD OF 30M LONG ANCHOR CABLE SUPPORTING UNIVERSAL BEAM
Technical Field The invention relates to the technical field of tunnel construction, in particular a method of m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel. Background The measures adopted, such as advanced pipe roof and advanced ductule, increasing the size of steel arch frame, grouting reinforcement and so on, cannot control the serious deformation of the large area of the primary support, and can not meet the construction requirements, resulting in the invasion limit of the initial support. Therefore, it is necessary to rework the arch frame and re-spray concrete to carry out the second lining, to be able to ensure the thickness of the second lining concrete. Content of Invention In order to solve the above technical problems, the invention provides a method of supporting 30m long anchor cable and radial grouting behind the primary support for the universal beam box girder arch frame at the side of severe bias pressure deformation of high-speed railway double-track tunnel, so as to solve the tunnel construction problem under the shallow buried bias pressure environment of surrounding rock. A method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel, which is characterized in that it includes the following steps: The first step, excavation; adopt three steps construction method; The second step, to erect universal beam box girder arch frame; the prefabricated universal beam box girderarch frame is supported on the excavation part and deals with the anchor pipe of locking foot and connecting bar. The third step, shotcrete; The fourth step, dealing with the anchor cable; one end of the anchor cable is connected with the universal beam box girder arch frame, and the other end is anchored on the ground outside the tunnel; The fifth step, the initial radial back grouting construction; consolidation of surrounding rock around the tunnel will further increase the deformation resistance of surrounding rock.: Optionally, in the first step, the drilling footage is 0.6 m per cycle. Optionally, the universal beam box girder arch comprises two universal beams arranged in parallel, and the shape of the two universal beams matches the shape of the tunnel. A connecting steel plate is arranged between the two universal beams. Optionally, the space between the two I-bars is 0.15 meters. Optionally, the size of the connecting steel plate is 30 cm x20 cm, and the thickness is 2 cm. The middle part of the connecting steel plate is provided with a circular hole with a radius of 7 cm. Optionally, the connecting steel plate and the universal beam are connected by full welding. Optionally, the space between adjacent universal beam box girder arches is 0.6 meters. Optionally, in the third step, the connecting steel plate on the universal beam box girder arch frame shall be reserved when the shotcrete is sprayed. Optionally, the anchor cable is connected with the connecting steel plate on the universal beam box girder arch frame. Beneficial effects of the invention: The method of bias pressure deformation in tunnel exit section in the invention adopts I beam box girder instead of ordinary universal beam to enhance the support strength. Anchor cable is used to strengthen the initial support in the tunnel to resist the large deformation of surrounding rock caused by shallow buried bias pressure and extruded tunnel. The initial support radial back grouting can consolidate the surrounding rock outside the tunnel, increase the anti-deformation ability of surrounding rock, improve the stability of surrounding rock during excavation and ensure the safety of operation. The thickness and time of self-stabilization of surrounding rock should be increased, and the strength of primary support structure should be increased, so that the initial support should bear 70% ~ 90% of the stress of surrounding rock, and the secondary lining should bear 10% ~ 30% of the stress of surrounding rock. Sulphur aluminate cement single liquid slurry with fast hardening and micro expansion is used in the slurry, which has a good effect on the geology of carbonaceous shale. Because the carbonaceous shale geology melts when it meets water, ordinary cement slurry can not only fail the consolidation effect, but also cause great damage to the surrounding rock structure, resulting in instability, while the fast hardening and micro-expansion sulfur aluminate cement does not have this problem, which really plays the role of grouting reinforcement.
Brief Description of the Drawings FIG. 1 is the front structure schematic diagram of the method for bias deformation of the tunnel exit section of the present invention. FIG. 2 is a schematic diagram of the side structure of the method of bias pressure deformation in the tunnel exit section of the present invention FIG. 3 is the structural schematic diagram of the universal beam box girder in the treatment method of bias deformation in the tunnel exit section of the present invention; FIG. 4 is the tunnel construction plane diagram of the invention. Attached drawing marks: 1. Anchor pipe; 2. Anchor cable; 3. Rockface; 4. Initial support surface; 5. Anchorage steel plate; 6. Tunnel face; 7. Universal beam box girder; 8. Universal beam; 9. Connecting plate. Description of Embodiments Embodiment 1 As shown in FIG.1, the embodiment provides a method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel, which includes the following steps: The first step, excavation; adopt three steps construction method; the drilling footage is 0.6 m per cycle. The second step, to erect the universal beam box girder 7 arch frame; the prefabricated universal beam box girder arch frame is supported on the excavation part and deals with the anchor pipe of locking foot and connecting bar. The third step, shotcrete; note to reserve anchorage steel plate 5; The fourth step, dealing with the anchor cable2; one end of the anchor cable2 is connected with the universal beam box girder7 arch frame, and the other end is anchored on the ground outside the tunnel; The fifth step, the initial radial back grouting construction; consolidation of surrounding rock around the tunnel will further increase the deformation resistance of surrounding rock. In embodiment, as shown in FIG.1-4, the universal beam box girder 7 arch frame adopts two 125 universal beam 8 with a spacing of 0.15 meters, and the connecting steel plate is arranged to the inner surface and outer surface of the two universal beam 8 for full welding connection, the connecting steel plate is 30cm x 20cm x 2cm steel plate, and the distance between the adjacent connecting steel plates is 1.5m.
The anchorage steel plate 5 is welded on the universal beam box girder 7 arch frame, and the anchorage steel plate 5 is 30cm x 40cm x 3cm steel plate, and the hole is drilled in the middle with a radius of 7cm, the contact surface of anchorage steel plate 5 and universal beam box girder 7 is fully welded. The spacing of anchorage steel plate 5 is 3 m x 2.85 m When erecting universal beam box girder7 arch frame, theq42x4.5 m anchor pipe of locking foot and p 22 steel bar are applied as connecting bars. The anchor cable 2 of 30 meters long is anchored on the anchorage steel plate 5, and the other end of the anchor cable 2 is anchored on the surrounding slope rock mass. The anchor cable 2 drill hole is used dry drill, and the water cement ratio is 0.4-0.5 pure cement grouting, cement can be used 525# Portland cement, adding 10% UEA-Z composite expansion agent and 0.6% efficient early strength water reducer, grouting pressure is 0.6-0.8mpa. In this specification, specific embodiments are applied to illustrate the principle and embodiment of the invention. The illustration of the embodiment above is only used to help understand the method and the core idea of the invention; at the same time, for the general technical personnel in this field, according to the thought of the invention, there will be changes in the specific embodiment mode and application scope. In summary, the contents of this specification shall not be construed as a limitation of the present invention.
1. A method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel, which is characterized in that it includes the following steps: The first step, excavation; adopt three steps construction method; The second step is to erect the universal beam arch; the prefabricated universal beam box girderarch frame is supported on the excavation part and deals with the anchor pipe of locking foot and connecting bar. The third step, shotcrete; The fourth step, dealing with the cable; one end of the anchor cable is connected with the universal beam box girder arch frame, and the other end is anchored on the ground outside the tunnel; The fifth step, the initial radial back grouting construction; consolidation of surrounding rock around the tunnel will further increase the deformation resistance of surrounding rock. 2. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 1, wherein in the first step, the drilling footage is 0.6 meters per cycle. 3. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 1, wherein the universal beam box girder arch comprises two universal beams arranged in parallel, and the shape of the two universal beams matches the shape of the tunnel, and a connecting steel plate is arranged between the two universal beams. 4. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 3, wherein the spacing between the two universal beams is 0.15 meters. 5. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 3, wherein the size of the connecting steel plate is 30 cm x20 cm, and the thickness is 2 cm, the middle part of the connecting steel plate is provided with a circular hole with a radius of 7 cm. 6. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 3, wherein the connecting steel plate and the universal beamare connected by full welding. 7. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 3, wherein the spacing between the adjacent universal beam box girder arches is 0.6 meters. 8. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 1, wherein the connecting steel plate on the arch of the universal beam box girder shall be reserved when the shotcrete is sprayed.
9. According to the method of bias pressure deformation of tunnel exit section mentioned in claim 1, wherein the anchor cable is connected with the connecting steel plate on the universal beam box girder arch frame.
2021104669 DRAWINGS
FIG. 1
FIG. 2
FIG. 3 DRAWINGS
FIG. 4 DRAWINGS
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104669A AU2021104669A4 (en) | 2021-07-28 | 2021-07-28 | A method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104669A AU2021104669A4 (en) | 2021-07-28 | 2021-07-28 | A method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021104669A4 true AU2021104669A4 (en) | 2021-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021104669A Ceased AU2021104669A4 (en) | 2021-07-28 | 2021-07-28 | A method of 30m long anchor cable supporting universal beam box girder arch frame at the side of severe deformation under bias pressure and radial grouting behind the initial support of high-speed railway double-track tunnel |
Country Status (1)
| Country | Link |
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| AU (1) | AU2021104669A4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086983A (en) * | 2021-11-23 | 2022-02-25 | 四川公路桥梁建设集团有限公司 | Combined reinforcing system for weak medium rock wall of extra-large-section branch tunnel |
| CN114233324A (en) * | 2021-12-17 | 2022-03-25 | 中铁大桥勘测设计院集团有限公司 | Tunnel structure suitable for bias working condition and construction method thereof |
| CN114718595A (en) * | 2022-03-18 | 2022-07-08 | 西南交通大学 | Arch cover method based ultra-large span tunnel excavation system and construction method thereof |
-
2021
- 2021-07-28 AU AU2021104669A patent/AU2021104669A4/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086983A (en) * | 2021-11-23 | 2022-02-25 | 四川公路桥梁建设集团有限公司 | Combined reinforcing system for weak medium rock wall of extra-large-section branch tunnel |
| CN114086983B (en) * | 2021-11-23 | 2023-08-15 | 四川公路桥梁建设集团有限公司 | Combined reinforcing system for weak middle rock wall of super-large section bifurcation tunnel |
| CN114233324A (en) * | 2021-12-17 | 2022-03-25 | 中铁大桥勘测设计院集团有限公司 | Tunnel structure suitable for bias working condition and construction method thereof |
| CN114718595A (en) * | 2022-03-18 | 2022-07-08 | 西南交通大学 | Arch cover method based ultra-large span tunnel excavation system and construction method thereof |
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| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |