CN109372543A - Mangnolia officinalis competent structure and construction method are owed in a kind of tunnel-liner - Google Patents
Mangnolia officinalis competent structure and construction method are owed in a kind of tunnel-liner Download PDFInfo
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- CN109372543A CN109372543A CN201811598564.4A CN201811598564A CN109372543A CN 109372543 A CN109372543 A CN 109372543A CN 201811598564 A CN201811598564 A CN 201811598564A CN 109372543 A CN109372543 A CN 109372543A
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- built
- tunnel
- secondary lining
- liner
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 239000011435 rock Substances 0.000 claims abstract description 22
- 238000007569 slipcasting Methods 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 11
- 230000002950 deficient Effects 0.000 claims abstract description 10
- 239000003292 glue Substances 0.000 claims abstract description 8
- 239000011378 shotcrete Substances 0.000 claims abstract description 7
- 238000009415 formwork Methods 0.000 claims abstract description 4
- 238000013461 design Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 201000010099 disease Diseases 0.000 description 6
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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
The invention discloses a kind of tunnel-liners to owe Mangnolia officinalis competent structure and construction method, reinforcing structure includes owing the newly-built secondary lining and newly-built preliminary bracing that thick region is equipped in tunnel-liner, newly-built secondary lining is connected with existing secondary lining, newly-built preliminary bracing is connected with existing preliminary bracing, further include several grouting rock bolts being equipped in the junction of newly-built preliminary bracing and existing preliminary bracing, and owes several slip casting steel floral tubes that thick region is equipped in tunnel-liner；Construction method includes setting interim steelframe supporting；Country rock is reinforced using slip casting steel floral tube；That removes the deficient thick region of tunnel-liner changes section, sets permanent steelframe supporting, and gunite concrete changeing segment frame, forms newly-built preliminary bracing；Set grouting rock bolt, then construct newly-built secondary lining and the pricker nail of existing secondary lining joint face, water-stop glue, and the laying lining waterproof layer between newly-built secondary lining and newly-built preliminary bracing formwork erection and pour newly-built secondary lining.
Description
Technical field
The present invention relates to Environment in Railway Engineering Construction technical field, in particular to Mangnolia officinalis competent structure and construction are owed in a kind of tunnel-liner
Method.
Background technique
Railway construction in China is with a long history, has reached 12.4 ten thousand kilometers by China railways operating mileage in 2016, wherein
2.2 ten thousand kilometers of high-speed rail operating mileage or more.But with the growth of service time, large quantities of tunnels start disease occur, such as
Thick, lining cutting back cavity or leakiness etc. are owed in percolating water, Lining cracks, lining cutting, and there are biggish security risks.Especially eight,
The tunnel built before the nineties, disease is even more serious, and urgent need solves the problems, such as, handles tunnel defect.Thick disease is owed in lining cutting
Most dangerous disease, lining cutting owe thickness and show that the thickness size of its liner structure is no longer satisfied design or code requirement, cannot
The loads such as carrying country rock completely, have the possibility of avalanche, chip off-falling, or even seriously affect tunnel normal operation at any time, cause huge
Economic loss.Owing thick treatment measures for lining cutting at present is mostly the measures such as grouting and reinforcing, steel arch-shelf reinforcing, thoroughly to solve lining
The harm for owing thick is built, how not only effectively but also rapidly to change lining cutting be current urgency changeing lining cutting is a kind of preferable solution,
Problem to be solved, and to post-process the research direction that thick defect is owed in lining cutting.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, a kind of tunnel-liner is provided and owes Mangnolia officinalis
Competent structure and construction method provide scientific basis to solve the deficient thick possible safety problem of tunnel-liner, thoroughly, effectively
Lining damages are handled, guarantee tunnel operation security.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
Mangnolia officinalis competent structure is owed in a kind of tunnel-liner, including owing the newly-built secondary lining that thick region is equipped with and new in tunnel-liner
Preliminary bracing is built, the newly-built secondary lining is connected with existing secondary lining, the newly-built preliminary bracing and existing initial stage branch
Shield is connected, and further includes several grouting rock bolts being equipped in the junction of newly-built preliminary bracing and existing preliminary bracing, and
Several slip casting steel floral tubes that thick region is equipped with are owed in tunnel-liner.
The present invention owes the existing secondary of thick region by creating secondary lining and newly-built preliminary bracing come replacement tunnel lining cutting
Lining cutting and existing preliminary bracing, and enhance by grouting rock bolt the stability of junction, it is enclosed by slip casting steel floral tube to reinforce
Rock forms a reasonable, safe and stable reinforcing structure, can effectively to lining cutting owe the diseases such as thickness, lining cutting back cavity into
Row regulation prevents collapsing, chip off-falling etc. from influencing the generation of security risk of tunnel operation, not only ensure that tunnel structure was safe, but also
It connects and has saved operation of engineering projects maintenance investment, so that tunnel-liner is owed thick Strengthening Design more reasonable, safe and reliable.
Preferably, it is connected between the newly-built secondary lining and existing secondary lining by several pricker nails, it is preferred that
Joint face of the pricker nail between the newly-built secondary lining and existing secondary lining is longitudinally, laterally spaced setting, at every
The anchoring adhesive being equipped at the pricker nail, so that the connection between newly-built secondary lining and existing secondary lining is stronger.
Preferably, the joint face between the newly-built secondary lining and existing secondary lining is equipped with water-stop glue, for changing
It is apt to its waterproof performance.
Preferably, it is equipped with lining waterproof layer between the newly-built secondary lining and newly-built preliminary bracing, improves its waterproof
Performance.
Preferably, the lining waterproof layer includes water plate and non-woven fabrics.
Preferably, the arch of the newly-built secondary lining is reserved with injected hole, and it is tight locally to will appear some comparisons in tunnel
The deficient thick position (such as within the scope of 10 ° of arch) of weight can owe thick position by injected hole to lining cutting and carry out local slip casting backfill, increase
The stability of strong lining cutting.
Preferably, the slip casting steel floral tube is arranged in blossom type, can effective Strengthening Tunnel peripheral rock.
The invention also discloses the construction method that Mangnolia officinalis competent structure is owed in a kind of tunnel-liner, any above-mentioned a kind of tunnel of constructing
Mangnolia officinalis competent structure is owed in road lining cutting, comprising the following steps:
Step 1: it is owed at thick region in tunnel-liner and its interim steelframe supporting is arranged in two sides；
Step 2: it is reinforced using the country rock that slip casting steel floral tube owes thick region to tunnel-liner；
Step 3: several of the deficient thick region of compartment dismounting tunnel-liner change section one, set up in the section one that changes
Permanent steelframe supporting, and gunite concrete form newly-built preliminary bracing；
Step 4: removing the interim steelframe supporting, changes described in continuous dismounting two and changes section two between section one,
The section two that changes sets up permanent steelframe supporting, and gunite concrete, forms newly-built preliminary bracing；
Step 5: grouting rock bolt is set in the junction of newly-built preliminary bracing and existing preliminary bracing, construction creates secondary
The pricker of lining cutting and existing secondary lining joint face nail, water-stop glue, and be laid between newly-built secondary lining and newly-built preliminary bracing
Then lining waterproof layer formwork erection and pours newly-built secondary lining.
Construction method of the present invention owes thick section existing lining cutting by removing lining cutting, creates lining cutting, forms tunnel-liner
Owe Mangnolia officinalis competent structure, then by setting grouting rock bolt, slip casting steel floral tube is reinforced, entire construction method is simple and easy, reinforce
It works well, can effectively and rapidly change lining cutting, solve the harm that lining cutting owes thick, ensure that the safety of tunnel operation
Property.
It preferably, further include step 6: after the concrete of the newly-built secondary lining reaches design strength, by reserved
Injected hole owes thick position to lining cutting and carries out slip casting backfill.
Compared with prior art, reinforcing structure of the present invention the utility model has the advantages that
The present invention owes the existing secondary of thick region by creating secondary lining and newly-built preliminary bracing come replacement tunnel lining cutting
Lining cutting and existing preliminary bracing, and enhance by grouting rock bolt the stability of junction, it is enclosed by slip casting steel floral tube to reinforce
Rock forms a reasonable, safe and stable reinforcing structure, can effectively to lining cutting owe the diseases such as thickness, lining cutting back cavity into
Row regulation prevents collapsing, chip off-falling etc. from influencing the generation of security risk of tunnel operation, not only ensure that tunnel structure was safe, but also
It connects and has saved operation of engineering projects maintenance investment, so that tunnel-liner is owed thick Strengthening Design more reasonable, safe and reliable.
Compared with prior art, the construction method of reinforcing structure of the present invention the utility model has the advantages that
Construction method of the present invention owes thick section existing lining cutting by removing lining cutting, creates lining cutting, forms tunnel-liner
Owe Mangnolia officinalis competent structure, then by setting grouting rock bolt, slip casting steel floral tube is reinforced, entire construction method is simple and easy, reinforce
It works well, can effectively and rapidly change lining cutting, solve the harm that lining cutting owes thick, ensure that the safety of tunnel operation
Property.
Detailed description of the invention:
Fig. 1 is the cross-sectional view that Mangnolia officinalis competent structure is owed in a kind of tunnel-liner of the present invention.
Fig. 2 is the new-old concrete connection figure that Mangnolia officinalis competent structure is owed in lining cutting of the present invention.
Fig. 3 is the I-I sectional view that Mangnolia officinalis competent structure is owed in lining cutting of the present invention.
Fig. 4 is the schematic diagram of the step of Mangnolia officinalis strong construction method is owed in lining cutting of the present invention three.
Fig. 5 is the schematic diagram of the step of Mangnolia officinalis strong construction method is owed in lining cutting of the present invention four.
Marked in the figure: the existing secondary lining of 1-, the existing preliminary bracing of 2-, 3- create secondary lining, 4- creates preliminary bracing,
Thick position is owed in 5- injected hole, 6- pricker nail, 7- grouting rock bolt, 8- anchoring adhesive, 9- water-stop glue, 10- lining waterproof layer, 11- lining cutting,
12- slip casting steel floral tube, 13- change section one, 14- interim steelframe supporting, the permanent steelframe supporting of 15-, and 16- changes section two.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1
As shown in Figure 1-Figure 3, Mangnolia officinalis competent structure is owed in a kind of tunnel-liner, new including being equipped in the deficient thick region of tunnel-liner
Build secondary lining 3 and newly-built preliminary bracing 4.
The newly-built preliminary bracing 4 is connected with existing preliminary bracing 2, and the newly-built preliminary bracing 4 and it is existing just
The junction of phase supporting 2 is equipped with several grouting rock bolts 7, enhances the stability of junction by grouting rock bolt 7.
It is connected between the newly-built secondary lining 3 and existing secondary lining 1 by several pricker nails 6, the pricker nail 6 exists
Joint face between the newly-built secondary lining 3 and existing secondary lining 1 is longitudinally, laterally spaced setting, in the every pricker nail 6
Place is equipped with anchoring adhesive 8.Specifically, drill on existing secondary lining 1, implantation pricker nail 6, and anchoring adhesive 8 is applied, so that newly-built two
Secondary lining cutting 3 and existing secondary lining 1 are securely engaged.Meanwhile between the newly-built secondary lining 3 and existing secondary lining 1
The water-stop glue 9 that joint face is equipped with, improves its waterproof performance.
Further, lining waterproof layer 10, the lining are equipped between newly-built secondary lining 3 and newly-built preliminary bracing 4
Building waterproof layer 10 includes water plate and non-woven fabrics, to improve the waterproof performance of lining cutting.
For further tunnel surrounding, several slip casting steel floral tubes 12 are equipped with owing thick region in tunnel-liner, meanwhile,
The arch of newly-built secondary lining 3 is reserved with injected hole 5, owes thick position 11 to lining cutting by reserved injected hole 5 and carries out local slip casting
Backfill.
Embodiment 2
The construction method of Mangnolia officinalis competent structure is owed in a kind of tunnel-liner, comprising the following steps:
Step 1: before changeing the deficient thick section of lining cutting, should first complete the defect regulation of adjacent paragraph, owe thick region in tunnel-liner
Interim steelframe supporting 14,14 longitudinal gap of interim steelframe supporting arrangement is arranged in place and its two sides；
Step 2: it is reinforced using the country rock that slip casting steel floral tube 12 owes thick region to tunnel-liner, slip casting steel floral tube 12
In changeing a section blossom type arranged for interval；
Step 3: several of the deficient thick region of compartment dismounting tunnel-liner change section 1, change section 1 described
Permanent steelframe supporting 15, and gunite concrete are set up, forms newly-built preliminary bracing 4, as shown in Figure 4；
Step 4: removing the interim steelframe supporting 14, changes described in continuous dismounting two and changes section between section 1
2 16, every one section of dismounting changes section 2 16, sets up permanent steelframe supporting 15, and gunite concrete, shape in the section 2 16 that changes
At newly-built preliminary bracing 4, as shown in Figure 5；
Step 5: grouting rock bolt 7, construction newly-built two are set in the junction of newly-built preliminary bracing 4 and existing preliminary bracing 2
The pricker of 1 joint face of secondary lining cutting 3 and existing secondary lining follows closely 6, water-stop glue 9, and in newly-built secondary lining 3 and newly-built preliminary bracing 4
Between be laid with lining waterproof layer 10, then formwork erection and pour newly-built secondary lining 3；
Step 6: after the concrete of the newly-built secondary lining 3 reaches design strength, pass through 5 pairs of linings of reserved injected hole
It builds deficient thick position 11 and carries out local slip casting backfill.
Reality in operation, before implementation steps one, needs first to measure the lining thickness of tunnel each region
And record, it screens undesirable lining cutting and owes thick region, then required according to strength of lining, owe thick region pair to each lining cutting
Newly-built secondary lining thickness size in requisition for construction is designed calibration, then passes through step 1 to step 6 to each lining
The newly-built secondary lining for building deficient thick region is constructed.
Above embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation
The present invention has been described in detail referring to above-mentioned each embodiment for book, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any couple of present invention modifies or equivalent replacement；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, are intended to be within the scope of the claims of the invention.
Claims (10)
1. Mangnolia officinalis competent structure is owed in a kind of tunnel-liner, which is characterized in that including owing newly-built two that thick region is equipped in tunnel-liner
Secondary lining cutting (3) and newly-built preliminary bracing (4), the newly-built secondary lining (3) are connected with existing secondary lining (1), described new
It builds preliminary bracing (4) to be connected with existing preliminary bracing (2), further includes in newly-built preliminary bracing (4) and existing preliminary bracing (2)
Several grouting rock bolts (7) being equipped with of junction, and owe several slip casting steel floral tubes that thick region is equipped in tunnel-liner
(12)。
2. Mangnolia officinalis competent structure is owed in a kind of tunnel-liner according to claim 1, which is characterized in that the newly-built secondary lining
(3) it is connected between existing secondary lining (1) by several pricker nails (6).
3. Mangnolia officinalis competent structure is owed in a kind of tunnel-liner according to claim 2, which is characterized in that the pricker nail (6) is in institute
The joint face stated between newly-built secondary lining (3) and existing secondary lining (1) is longitudinally, laterally spaced setting.
4. Mangnolia officinalis competent structure is owed in a kind of tunnel-liner according to claim 2, which is characterized in that further include described in every
The anchoring adhesive (8) being equipped at pricker nail (6), and the connection between the newly-built secondary lining (3) and existing secondary lining (1)
The water-stop glue (9) that face is equipped with.
5. Mangnolia officinalis competent structure is owed in a kind of tunnel-liner according to claim 1, which is characterized in that the newly-built secondary lining
(3) it is equipped between newly-built preliminary bracing (4) lining waterproof layer (10).
6. Mangnolia officinalis competent structure is owed in a kind of tunnel-liner according to claim 5, which is characterized in that the lining waterproof layer
It (10) include water plate and non-woven fabrics.
7. Mangnolia officinalis competent structure is owed in a kind of -6 any tunnel-liners according to claim 1, which is characterized in that described newly-built two
The arch of secondary lining cutting (3) is reserved with injected hole (5).
8. Mangnolia officinalis competent structure is owed in a kind of -6 any tunnel-liners according to claim 1, which is characterized in that the slip casting steel
Floral tube (12) is arranged in blossom type.
9. the construction method that Mangnolia officinalis competent structure is owed in a kind of tunnel-liner, which is characterized in that construction is as described in claim 1-8 is any
A kind of tunnel-liner owe Mangnolia officinalis competent structure, comprising the following steps:
Step 1: it is owed at thick region in tunnel-liner and its interim steelframe supporting (14) is arranged in two sides；
Step 2: it is reinforced using the country rock that slip casting steel floral tube (12) owe thick region to tunnel-liner；
Step 3: several of the deficient thick region of compartment dismounting tunnel-liner change section one (13), change section one (13) described
Permanent steelframe supporting (15), and gunite concrete are set up, newly-built preliminary bracing (4) are formed；
Step 4: removing the interim steelframe supporting (14), changes described in continuous dismounting two and changes section between section one (13)
Two (16) set up permanent steelframe supporting (15), and gunite concrete in the section two (16) that changes, form newly-built preliminary bracing
(4)；
Step 5: it is set grouting rock bolt (7) in the junction of newly-built preliminary bracing (4) and existing preliminary bracing (2), construction is newly-built
The pricker of secondary lining (3) and existing secondary lining (1) joint face follows closely (6), water-stop glue (9), and in newly-built secondary lining (3) and newly
Laying lining waterproof layer (10) is built between preliminary bracing (4), then formwork erection and pours newly-built secondary lining (3).
10. the construction method that Mangnolia officinalis competent structure is owed in a kind of tunnel-liner according to claim 9, which is characterized in that also wrap
Include step 6: after the concrete of the newly-built secondary lining (3) reaches design strength, by reserved injected hole (5) to lining cutting
It owes thickness position (11) and carries out slip casting backfill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598564.4A CN109372543B (en) | 2018-12-25 | 2018-12-25 | Tunnel lining underthickness reinforcement structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598564.4A CN109372543B (en) | 2018-12-25 | 2018-12-25 | Tunnel lining underthickness reinforcement structure and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109372543A true CN109372543A (en) | 2019-02-22 |
| CN109372543B CN109372543B (en) | 2024-01-23 |
Family
ID=65372173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811598564.4A Active CN109372543B (en) | 2018-12-25 | 2018-12-25 | Tunnel lining underthickness reinforcement structure and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109372543B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593909A (en) * | 2019-10-18 | 2019-12-20 | 中铁隧道局集团有限公司 | Tunnel secondary lining dismounting and replacing construction method |
| CN111206941A (en) * | 2020-01-15 | 2020-05-29 | 中铁十六局集团有限公司 | Tunnel lining thickness deficiency processing method |
| CN111271097A (en) * | 2020-03-30 | 2020-06-12 | 中铁二院工程集团有限责任公司 | Construction joint waterproof structure suitable for reconstructing tunnel lining and construction method thereof |
| CN112096422A (en) * | 2020-10-25 | 2020-12-18 | 山西省交通科技研发有限公司 | Structure and method for repairing primary support invasion limit of large-section weak surrounding rock tunnel |
| CN112096419A (en) * | 2020-10-25 | 2020-12-18 | 山西省交通科技研发有限公司 | Supporting structure and method for repairing tunnel secondary lining damage |
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| CN110593909A (en) * | 2019-10-18 | 2019-12-20 | 中铁隧道局集团有限公司 | Tunnel secondary lining dismounting and replacing construction method |
| CN111206941A (en) * | 2020-01-15 | 2020-05-29 | 中铁十六局集团有限公司 | Tunnel lining thickness deficiency processing method |
| CN111271097A (en) * | 2020-03-30 | 2020-06-12 | 中铁二院工程集团有限责任公司 | Construction joint waterproof structure suitable for reconstructing tunnel lining and construction method thereof |
| CN112096422A (en) * | 2020-10-25 | 2020-12-18 | 山西省交通科技研发有限公司 | Structure and method for repairing primary support invasion limit of large-section weak surrounding rock tunnel |
| CN112096419A (en) * | 2020-10-25 | 2020-12-18 | 山西省交通科技研发有限公司 | Supporting structure and method for repairing tunnel secondary lining damage |
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