CN108204236A - Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method - Google Patents
Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method Download PDFInfo
- Publication number
- CN108204236A CN108204236A CN201711497976.4A CN201711497976A CN108204236A CN 108204236 A CN108204236 A CN 108204236A CN 201711497976 A CN201711497976 A CN 201711497976A CN 108204236 A CN108204236 A CN 108204236A
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- peripheral portion
- drilling depth
- middle section
- construction
- piecemeal
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 18
- 230000005641 tunneling Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims abstract description 28
- 238000009412 basement excavation Methods 0.000 claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 15
- 238000004880 explosion Methods 0.000 claims description 4
- 239000004567 concrete Substances 0.000 abstract description 7
- 239000011378 shotcrete Substances 0.000 abstract description 6
- 230000004888 barrier function Effects 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000003801 milling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035515 penetration Effects 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
-
- 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)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling methods.Tunnel excavation section is divided into middle section（1）With peripheral portion（2）Two parts synchronous construction.First use the big drilling depth drill-blast tunnelling middle section of drill jumbo tunneling boring（1）, 4.0~4.5m of drilling depth, and to middle section arch wall（1‑1）It applies gunite concrete and carries out gib as first step cycle；Then the small drilling depth drill-blast tunnelling peripheral portion of drill jumbo is used（2）, 2.5~3.0m of drilling depth, and to peripheral portion arch wall（2‑1）Preliminary bracing is applied to recycle as second step.Then proceed to construction middle section（1）Second first step cycle；Then continuous construction peripheral portion（2）Two second step cycles.The present invention, which successfully solves drill jumbo and excavates drilling depth, to be caused to backbreak greatly value also larger technical barrier.The present invention is suitable for I, II grade of country rock of major long tunnel and is constructed using drill jumbo full section method drill-blast tunnelling.
Description
Technical field
The present invention relates to a kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling methods.
Background technology
When I, II grade of country rock section full section method of major long tunnel excavates, to accelerate construction progress, working efficiency is improved, is usually adopted
It is constructed with three arms or four-arm rock drilling jumbo.Drill jumbo penetration rate is fast, efficient, and cyclic advance is big, general reachable 4.0~
4.5m, therefore, construction speed are fast.But big because excavating cyclic advance, tunnel value of backbreaking is also larger.Since excessive is backbreak so that
Gunite concrete quantity is significantly increased with lining concrete quantity, is added significantly to constructing tunnel cost.Therefore, one kind need to be found
Method will can have faster excavation progress, and tunnel excavation can be backbreak to value control within limits.
Invention content
The technical problem to be solved by the present invention is to：A kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling is provided
Method, you can to ensure having faster excavation progress, and tunnel blasting excavation can be backbreak to value control within limits, carried
High constructing tunnel comprehensive benefit.
The technical scheme is that：A kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method, by tunnel
Road excavated section is divided into middle section and peripheral portion two parts synchronous construction, one layer of quick-fried layer of light is reserved, during peripheral portion is closely followed
Between partly construct.The first big drilling depth of tunneling boring excavates middle section and applies gib and recycled as the first step, then small drilling depth
It excavates peripheral portion and applies preliminary bracing and recycled as second step；Second first step cycle of construction is then proceeded to, is then connected
Continuous two second step cycles of construction.It repeats the above steps and constructs.
The thickness of pre -arranged layer, that is, peripheral portion is designed according to rock property and explosion and is determined, middle hard rock for 50~
70cm。
First step cycle excavates heavy workload, is excavated using the big drilling depth of drill jumbo, to meet excavation schedule requirement, excavates
4.0~4.5m of drilling depth；Second step cycle excavation workload is small, is excavated using the small drilling depth of drill jumbo, excessive with control over-excavation value,
Excavate 2.5~3.0m of drilling depth.
In first step cycle, after middle section is excavated, gunite concrete gib is carried out to middle section arch wall, with
Ensure construction safety.
In second step cycle, periphery hole spacing is designed according to rock property and explosion and is determined, middle hard rock takes 40~55cm.
In second step cycle, after peripheral portion excavates, first handled with milling digging machine and owe to dig, then to peripheral portion arch wall by setting
Meter requirement applies the preliminary bracings such as 22 anchor poles of Φ and gunite concrete.
Second step cycle once or twice is carried out after often carrying out a first step cycle, makes peripheral portion excavation face and centre
The distance between part face is less than 2.5m, to ensure construction safety and convenient for constructing.
Beneficial effects of the present invention：
Tunnel excavation face is divided into middle section and peripheral portion two parts synchronous construction, middle section is excavated heavy workload, adopted
It is excavated with big drilling depth, can meet and excavate schedule requirement；Peripheral portion excavation workload is small, is excavated using small drilling depth, can be preferably
The problem of control over-excavation value is excessive.Peripheral portion is excavated immediately following middle section, is conducive to two parts and is constructed using drill jumbo,
Process conversion and construction input can be reduced.The present invention can not only meet the schedule requirement of Rapid Construction of Tunnels, but also tunnel can be avoided to open
Digging value of backbreaking is excessive, successfully solves drill jumbo and excavates drilling depth and cause to backbreak greatly value also larger technical barrier, suitable for length
Big I, II grade of tunnel country rock is constructed using drill jumbo full section method drill-blast tunnelling.
Description of the drawings
Fig. 1 is the tunnel piecemeal synchronous construction full face tunneling cross-sectional view of the present invention.
Fig. 2 is A-A sectional views of Fig. 1, i.e. tunnel piecemeal synchronous construction full face tunneling skiagraph.
Specific embodiment
The embodiment of the present invention：II grade of country rock section of Double-track Tunnel is excavated using three arm rock drilling jumbo full section drill bursts,
Excavated section is divided into middle section 1 and 2 two parts synchronous construction of peripheral portion, when drill-blast tunnelling reserves one layer of quick-fried layer of light, i.e.,
Peripheral portion 2, thickness 60cm, peripheral portion 2 are constructed immediately following middle section 1.
First first step cycle is carried out with the big drilling depth drill-blast tunnelling middle section 1 of three arm rock drilling jumbo tunneling borings, drilling depth 4.5m,
After muck removal, gib is carried out to middle section arch wall 1-1, applies 3cm thickness gunite concretes.It then continues to three arm drilling stagings
The small drilling depth drill-blast tunnelling peripheral portion 2 of vehicle carries out second step cycle, periphery hole spacing 50cm, drilling depth 3.0m.Peripheral portion 2
After excavation, first owe to dig with a milling digging machine processing, then arch locally applies 22 anchor poles 3 of Φ, 1.5 × 1.5m of spacing, single length
2.5m；Peripheral portion arch wall 2-1 applies 5cm thickness gunite concretes.After applying preliminary bracing by design requirement, it is big to continue tunneling boring
Drilling depth drill-blast tunnelling, second first step cycle of gib middle section 1, drilling depth 4.5m；Then continuous small drilling depth excavate,
2 two second step cycles of supporting peripheral portion, per cyclic advance 3.0m.It repeats the above steps and constructs.
Peripheral portion 2 is constructed immediately following middle section 1 in construction, stringent to control peripheral portion excavation face 2-2 and middle section
The distance between face 1-2 is within 2.5m, to ensure construction safety and convenient for constructing.
Claims (5)
- A kind of 1. pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method, it is characterised in that：By tunnel excavation section It is divided into middle section（1）With peripheral portion（2）Two parts synchronous construction, the first big drilling depth of tunneling boring excavate middle section（1）And it applies Make gib to recycle as the first step, then small drilling depth excavates peripheral portion（2）And it applies preliminary bracing and is followed as second step Ring；Second first step cycle of construction is then proceeded to, then continuous two second step cycles of construction.
- 2. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 1, it is characterised in that： Peripheral portion（2）Immediately following middle section（1）Construction, peripheral portion excavation face（2-2）With middle section face（1-2）Between Distance is less than 2.5m.
- 3. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 1, it is characterised in that： Pre -arranged layer peripheral portion（2）Thickness designed and determine according to rock property and explosion, middle hard rock is 50~70cm.
- 4. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 1, it is characterised in that： First step cycle excavates 4.0~4.5m of drilling depth, and second step cycle excavates 2.5~3.0m of drilling depth, often carries out a first step cycle Followed by carry out second step cycle once or twice.
- 5. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 4, it is characterised in that： In second step cycle, periphery hole spacing is designed according to rock property and explosion and is determined, middle hard rock takes 40~55cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711497976.4A CN108204236A (en) | 2017-12-29 | 2017-12-29 | Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711497976.4A CN108204236A (en) | 2017-12-29 | 2017-12-29 | Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108204236A true CN108204236A (en) | 2018-06-26 |
Family
ID=62606192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711497976.4A Pending CN108204236A (en) | 2017-12-29 | 2017-12-29 | Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108204236A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502762A (en) * | 2020-04-24 | 2020-08-07 | 中铁五局集团有限公司 | Blasting damage detection method based on small-spacing cavern group |
| CN113932666A (en) * | 2021-09-02 | 2022-01-14 | 中铁十八局集团有限公司 | Mountain tunnel accurate construction method and structure |
| CN114152159A (en) * | 2021-12-09 | 2022-03-08 | 中国葛洲坝集团国际工程有限公司 | Full-section synchronous blasting tunneling construction method for side wall on reserved side of large-section tunnel crown arch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244133A (en) * | 2013-05-17 | 2013-08-14 | 贵州省公路工程集团有限公司 | Coal measure strata tunnel milling digging and blasting combined construction method |
| CN103899318A (en) * | 2014-03-17 | 2014-07-02 | 神华包神铁路有限责任公司 | Medium ground tunnel milling excavating and mating mechanized construction method |
| CN104790978A (en) * | 2015-03-10 | 2015-07-22 | 中铁九局集团有限公司 | Small-clear-distance grade separation tunnel annular guide pit construction method |
| CN107218043A (en) * | 2017-08-27 | 2017-09-29 | 中铁二十局集团第六工程有限公司 | A kind of breaking surrounding rock cavern excavation method |
-
2017
- 2017-12-29 CN CN201711497976.4A patent/CN108204236A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244133A (en) * | 2013-05-17 | 2013-08-14 | 贵州省公路工程集团有限公司 | Coal measure strata tunnel milling digging and blasting combined construction method |
| CN103899318A (en) * | 2014-03-17 | 2014-07-02 | 神华包神铁路有限责任公司 | Medium ground tunnel milling excavating and mating mechanized construction method |
| CN104790978A (en) * | 2015-03-10 | 2015-07-22 | 中铁九局集团有限公司 | Small-clear-distance grade separation tunnel annular guide pit construction method |
| CN107218043A (en) * | 2017-08-27 | 2017-09-29 | 中铁二十局集团第六工程有限公司 | A kind of breaking surrounding rock cavern excavation method |
Non-Patent Citations (1)
| Title |
|---|
| 芮江: "《预留光面层光面爆破在大湾隧道施工中的应用》", 《四川水泥》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502762A (en) * | 2020-04-24 | 2020-08-07 | 中铁五局集团有限公司 | Blasting damage detection method based on small-spacing cavern group |
| CN113932666A (en) * | 2021-09-02 | 2022-01-14 | 中铁十八局集团有限公司 | Mountain tunnel accurate construction method and structure |
| CN114152159A (en) * | 2021-12-09 | 2022-03-08 | 中国葛洲坝集团国际工程有限公司 | Full-section synchronous blasting tunneling construction method for side wall on reserved side of large-section tunnel crown arch |
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Application publication date: 20180626 |
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