CN109252868A - Hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing method - Google Patents
Hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing method Download PDFInfo
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- CN109252868A CN109252868A CN201811239758.5A CN201811239758A CN109252868A CN 109252868 A CN109252868 A CN 109252868A CN 201811239758 A CN201811239758 A CN 201811239758A CN 109252868 A CN109252868 A CN 109252868A
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- boulder
- basement rock
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- rock protrusion
- hole
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- 239000011435 rock Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000003672 processing method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000007569 slipcasting Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000005474 detonation Methods 0.000 claims abstract description 6
- 238000004880 explosion Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000005422 blasting Methods 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 6
- 235000020004 porter Nutrition 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 210000004907 gland Anatomy 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 231100000241 scar Toxicity 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing methods, are surveyed in detail according to geology, carry out drawing hole construction to boulder and basement rock protrusion top surface by ground；To in shield route boulder and basement rock protrusion carry out taking hole, according to the pitch-row of blasthole, array pitch, lay PVC pillar, pillar is provided with plug；Blasthole is checked and accepted, and carries out blast hole projectile filling: blasthole is covered, and memory detonation, core detection: carrying out slip casting after detection is qualified and ground reinforces, earth's surface sealing of hole.Existing boulder, basement rock protrusion are pre-processed using " internal action pack ", it can be ensured that earth pressure balanced shield, EPBS can be in the safe and efficient construction of hard-soft heterogeneous ground.
Description
Technical field
The present invention relates to a kind of hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing methods.
Background technique
With economic sustainable development, the continuous promotion of overall national strength and the continuous application of new and high technology, rock tunnel(ling) machine
Research and development are constantly progressive with manufacture, and the construction of Underground Rail Transit is grown rapidly, and are effectively alleviated urban traffic blocking, are improved
Level of Urban Modernization.
In the soft or hard rock strata metro work progress such as China Guangzhou, Shenzhen, rock matter hard boulder and basement rock are frequently encountered
Protrusion intrusion shield driving section, easily causes shield cutter frequently even severely deformed by card, schedule delays cause huge warp
Ji loss, results even in working face and gushs, caves in, cause Sudden Geological Hazards.
Summary of the invention
The present invention to solve the above-mentioned problems, proposes a kind of hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock high spot
Reason method, the present invention can ensure that earth pressure balanced shield, EPBS can be in the safe and efficient construction of hard-soft heterogeneous ground.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing method, comprising the following steps:
It is surveyed in detail according to geology, drawing hole construction is carried out to boulder and basement rock protrusion top surface by ground；
To in shield route boulder and basement rock protrusion carry out taking hole, according to the pitch-row of blasthole, array pitch, lay PVC pillar,
Pillar is provided with plug；
Blasthole is checked and accepted, and carries out blast hole projectile filling:
Blasthole is covered, and memory detonation, core detection:
Slip casting is carried out after detection is qualified and ground reinforces, earth's surface sealing of hole.
Further, drilling rod is selected vertically to take hole, pitch-row, the array pitch of blasthole are positioned by measuring instrument equipment；Blasthole cloth
Setting must be beyond boulder, more than basement rock protrusion range certain distance, to guarantee demolition effect.
Further, the plug of the PVC pillar tube bottom installation rubber belt sealing.
Further, blasthole length in scar height, that is, overburden cover and rock is recorded in boring procedure.
Further, emulsion is fitted into the PVC pillar of pre-plugged to and is placed multiple detonator, two adjacent groups pack
Between the spacer of certain length is set, loaded length, which is greater than, needs the thickness of explosion rock stratum.
Further, the payment to a porter total length of emulsion packet is greater than hole depth certain length, and is marked in payment to a porter,
The length of the mark to PVC pillar bottom is equal to full blast hole depth.
Further, protection, heavy gland are maked somebody a mere figurehead to blasthole using steel bracket, is provided with steel mesh on the steel bracket
Piece, piling up on reinforced mesh has concrete block.
Further, at the every place's coring at least two of boulder, wherein boulder center position need to be located at one；Basement rock protrusion is every
Locate at coring at least three, coring depth reaches projected depth, is analyzed the core degree of splitting of taking-up, is judged, with what is extracted
It is qualification that the complete unidirectional length of core, which is less than or equal to setting value, if unqualified, perforations adding carries out secondary blasting.
Further, convex to boulder and basement rock using mini-valve tube retrusive segmenting slip casting technique in the slip casting of explosion hole site
The broken soil body for playing position is reinforced, and single slurry is selected within the scope of tunnel, and tunnel outlet 1m selects cement and waterglass biliquid
Starch strengthening stratum.
Further, sealing of hole, cement mortar mix ratio water are carried out to boundary exploration hole and blasting boreholes using cement mortar
Mud: sand: appropriate accelerator is added in slurries in water=0.24:1:0.29.
Compared with prior art, the invention has the benefit that
The present invention pre-processes existing boulder, basement rock protrusion using " internal action pack ", can effectively improve orphan
Stone explosion precision, while can significantly shorten the construction period, reduce huge stone handling expense, it is ensured that earth pressure balanced shield, EPBS is safe and efficient
Pass through hard-soft heterogeneous ground.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is charge constitution figure of the invention；
Specific embodiment:
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this hair
Bright each component or component structure relationship and the relative of determination, not refer in particular to either component or element in the present invention, cannot understand
For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection,
It is also possible to be integrally connected or is detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the present invention as the case may be,
It is not considered as limiting the invention.
The present invention pre-processes, specific technical solution existing boulder, basement rock protrusion using " internal action pack "
It is as follows:
S1, it is surveyed according to geology, is pushed up by ground 1 using the protrusion of hundred meters of drilling row drawing hole constructions to boulder and basement rock 10 in detail
Face；
S2, using crawler belt anchorage machine in shield route boulder and basement rock 10 carry out taking hole:
1) diameter 108mm drilling rod is selected vertically to take hole, pitch-row, the array pitch of blasthole are fixed by measuring instruments equipment such as total stations
Position；Since boulder, basement rock protrusion boundary are there are inexactness, steel for shot must exceed the raised range 2m of boulder, basement rock 10, with
Guarantee demolition effect；
2) the PVC pillar 2 of diameter 75mm is laid, tube bottom installs the plug of rubber belt sealing, prevents foreign matter from falling into blocking blasthole；
3) scar height, that is, 3 thickness of coating, blasthole length in rock are recorded in boring procedure；
S3, blasthole are checked and accepted:
It after blasthole is drilled, is checked and accepted by technical staff, unobstructed casing and the pack of being packed into is qualification above and below blasthole, and carries out shield
Wall and pore-forming protection, can powder charge construction after acceptance(check)；
S4, blast hole projectile filling:
Emulsion 7 is fitted into the PVC pillar 2 of pre-plugged to and is placed 4 hair detonators 9, is arranged between two adjacent groups pack
The spacer 8 of certain length.Loaded length is greater than the thickness for needing explosion rock stratum.4 total length of payment to a porter of pack is greater than hole depth 2m,
And the obvious marker such as fasten small red cloth item in payment to a porter 4, to make marks, the length of the mark to 2 bottom of PVC pillar is equal to
Full blasthole (overburden cover+rock blast hole depth) depth.After the completion of powder charge, blasthole is filled with yellow sand 5；
S5, blasthole covering:
To prevent explosion from causing, muddy water splashes and PVC pillar 2 is raised, to the aerial protection of blasthole, heavy gland, overhead height
0.6m.Empty, the support cage bottom using integral solder, the steel bracket cage having a size of 2.0m × 2.0m × 1.2m (length × width × height)
Reinforced mesh is welded or riveted, 2 layers of bamboo chip are bundled on reinforced mesh, pile up concrete block on bamboo chip, each bracket after counterweight
Cage weight is greater than 2000Kg；
S6, detonation, core detection:
1) explosion using primacord 6 by millisecond extension mode explosion between row, the built-in 4 hair detonator 9 of each blasthole, dedicated
Quick-fried device detonation.Once detonation blasthole number is determined according to the largest segment dose to detonate is allowed；
2) core detection demolition effect is carried out after explosion, at the every place's coring 2 of boulder, wherein boulder centre bit need to be located at one
Set place；At the every place's coring 3 of basement rock protrusion.Coring depth reaches projected depth (2m range below running tunnel bottom)；
3) the core degree of splitting of taking-up analyzed, judged, be to close with the unidirectional length≤25cm of the complete core extracted
Lattice, if unqualified, perforations adding carries out secondary blasting；
S7, slip casting and ground reinforce
Using mini-valve tube retrusive segmenting slip casting technique in the slip casting of explosion hole site, to 10 positions of boulder and basement rock protrusion
The broken soil body is reinforced.Preferably to control grouting serous fluid range of scatter, single slurry, tunnel outlet 1m are selected within the scope of tunnel
Select cement+waterglass dual slurry strengthening stratum.
S8, earth's surface sealing of hole
Sealing of hole is carried out to boundary exploration hole and blasting boreholes using cement mortar, cement mortar mix ratio cement: sand: water=
Appropriate accelerator is added in slurries by 0.24:1:0.29, and the allotment of accelerator parameter scene, sealing quality must be through field management people
Member's acceptance(check).
Certainly, above-mentioned parameter can be adjusted as the case may be.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing method, it is characterized in that: the following steps are included:
It is surveyed in detail according to geology, drawing hole construction is carried out to boulder and basement rock protrusion top surface by ground；
To in shield route boulder and basement rock protrusion carry out taking hole, according to the pitch-row of blasthole, array pitch, lay PVC pillar, pillar
It is provided with plug；
Blasthole is checked and accepted, and carries out blast hole projectile filling:
Blasthole is covered, and memory detonation, core detection:
Slip casting is carried out after detection is qualified and ground reinforces, earth's surface sealing of hole.
2. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: selects drilling rod vertically to take hole, pitch-row, the array pitch of blasthole are positioned by measuring instrument equipment；Steel for shot must beyond boulder,
More than basement rock protrusion range certain distance, to guarantee demolition effect.
3. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: the plug of the PVC pillar tube bottom installation rubber belt sealing.
4. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: records blasthole length in scar height i.e. overburden cover and rock in boring procedure.
5. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: emulsion is fitted into the PVC pillar of pre-plugged to and is placed multiple detonator, certain length is set between two adjacent groups pack
Spacer, loaded length, which is greater than, needs the thickness of explosion rock stratum.
6. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as claimed in claim 5 and basement rock protrusion processing method, feature
Be: the payment to a porter total length of emulsion packet is greater than hole depth certain length, and is marked in payment to a porter, and the mark to PVC is protected
The length of bottom of the tube is equal to full blast hole depth.
7. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: protection, heavy gland is maked somebody a mere figurehead to blasthole using steel bracket, are provided with reinforced mesh, code on reinforced mesh on the steel bracket
It is placed with concrete block.
8. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: at the every place's coring at least two of boulder, wherein boulder center position need to be located at one；The every place's coring at least three of basement rock protrusion
Place, coring depth reaches projected depth, is analyzed the core degree of splitting of taking-up, judged, unidirectional with the complete core extracted
It is qualification that length, which is less than or equal to setting value, if unqualified, perforations adding carries out secondary blasting.
9. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: using mini-valve tube retrusive segmenting slip casting technique in the slip casting of explosion hole site, to the broken soil of boulder and basement rock raised position
Body is reinforced, and single slurry is selected within the scope of tunnel, and tunnel outlet 1m selects cement and waterglass dual slurry strengthening stratum.
10. a kind of hard-soft heterogeneous ground shield-tunneling construction boulder as described in claim 1 and basement rock protrusion processing method, feature
It is: sealing of hole is carried out to boundary exploration hole and blasting boreholes using cement mortar, cement mortar mix ratio cement: sand: water=0.24:
Appropriate accelerator is added in slurries in 1:0.29.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811239758.5A CN109252868A (en) | 2018-10-23 | 2018-10-23 | Hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811239758.5A CN109252868A (en) | 2018-10-23 | 2018-10-23 | Hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing method |
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| CN109252868A true CN109252868A (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811239758.5A Pending CN109252868A (en) | 2018-10-23 | 2018-10-23 | Hard-soft heterogeneous ground shield-tunneling construction boulder and basement rock protrusion processing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512667A (en) * | 2019-09-04 | 2019-11-29 | 长沙有色冶金设计研究院有限公司 | It is a kind of to handle because water damage leads to the new method of pile foundation settlement |
| CN110656947A (en) * | 2019-10-30 | 2020-01-07 | 中铁隧道局集团有限公司 | Method for tunneling raised section of seabed bedrock |
| CN110671984A (en) * | 2019-10-14 | 2020-01-10 | 中铁隧道局集团有限公司 | Boulder blasting construction method |
| CN110685716A (en) * | 2019-10-12 | 2020-01-14 | 中铁隧道局集团有限公司 | Sleeve valve pipe grouting method after boulder blasting treatment |
| CN110924956A (en) * | 2019-12-20 | 2020-03-27 | 中铁隧道局集团有限公司 | Tunnel shield tunneling method containing boulder and bedrock raised stratum |
| CN110939449A (en) * | 2019-12-20 | 2020-03-31 | 中铁隧道局集团有限公司 | Method for treating bed rock raised stratum in shield construction |
| CN113107498A (en) * | 2021-04-20 | 2021-07-13 | 中铁十六局集团北京轨道交通工程建设有限公司 | Construction method for tunnel passing through partially invaded rock stratum by shield method |
| CN114198120A (en) * | 2021-12-14 | 2022-03-18 | 中铁华铁工程设计集团有限公司 | Construction method for treating fault broken zone of shield segment of submarine tunnel |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512667A (en) * | 2019-09-04 | 2019-11-29 | 长沙有色冶金设计研究院有限公司 | It is a kind of to handle because water damage leads to the new method of pile foundation settlement |
| CN110685716A (en) * | 2019-10-12 | 2020-01-14 | 中铁隧道局集团有限公司 | Sleeve valve pipe grouting method after boulder blasting treatment |
| CN110671984A (en) * | 2019-10-14 | 2020-01-10 | 中铁隧道局集团有限公司 | Boulder blasting construction method |
| CN110656947A (en) * | 2019-10-30 | 2020-01-07 | 中铁隧道局集团有限公司 | Method for tunneling raised section of seabed bedrock |
| CN110656947B (en) * | 2019-10-30 | 2021-07-23 | 中铁隧道局集团有限公司 | Method for tunneling raised section of seabed bedrock |
| CN110924956A (en) * | 2019-12-20 | 2020-03-27 | 中铁隧道局集团有限公司 | Tunnel shield tunneling method containing boulder and bedrock raised stratum |
| CN110939449A (en) * | 2019-12-20 | 2020-03-31 | 中铁隧道局集团有限公司 | Method for treating bed rock raised stratum in shield construction |
| CN113107498A (en) * | 2021-04-20 | 2021-07-13 | 中铁十六局集团北京轨道交通工程建设有限公司 | Construction method for tunnel passing through partially invaded rock stratum by shield method |
| CN113107498B (en) * | 2021-04-20 | 2024-03-08 | 中铁十六局集团北京轨道交通工程建设有限公司 | Construction method for shield tunnel to penetrate through local invasive rock stratum |
| CN114198120A (en) * | 2021-12-14 | 2022-03-18 | 中铁华铁工程设计集团有限公司 | Construction method for treating fault broken zone of shield segment of submarine tunnel |
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Application publication date: 20190122 |
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