CN104500076B - Large section, Long span collapse and cave-in granular media tunnel driving method - Google Patents
Large section, Long span collapse and cave-in granular media tunnel driving method Download PDFInfo
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- CN104500076B CN104500076B CN201410699387.4A CN201410699387A CN104500076B CN 104500076 B CN104500076 B CN 104500076B CN 201410699387 A CN201410699387 A CN 201410699387A CN 104500076 B CN104500076 B CN 104500076B
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- excavated
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- excavating
- driving method
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000009412 basement excavation Methods 0.000 claims abstract description 49
- 238000010276 construction Methods 0.000 claims abstract description 26
- 239000002689 soil Substances 0.000 claims description 49
- 239000004567 concrete Substances 0.000 claims description 25
- 239000007921 spray Substances 0.000 claims description 21
- 239000002893 slag Substances 0.000 abstract description 8
- 239000004575 stone Substances 0.000 description 9
- 238000005553 drilling Methods 0.000 description 8
- 239000000725 suspension Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21D19/00—Provisional protective covers for working space
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention provides a kind of large section, Long span collapse and cave-in granular media tunnel driving method, particularly a kind of large section, Long span collapse and cave-in granular media tunnel driving method applied to Tunnel Engineering field；The present invention provide it is a kind of it is easy for construction, the scope of operation can be effectively increased, save construction investment, the large section that can ensure that tunnel excavation construction safety, Long span collapse and cave-in granular media tunnel driving method.Its main implementation steps includes：A, tunnel excavation section is divided into five parts；B, top is excavated, and carries out supporting；C, top bar is excavated, and carries out supporting；D, step in excavating, and carry out supporting；E, excavate and get out of a predicament or an embarrassing situation, and carry out supporting；F, inverted arch part is excavated, and carries out supporting.This method takes full advantage of the self-stable ability for the slag body that collapses in digging process, reduces gib measure, the construction safety in the interim domatic stability problem of the slag body that solves the problems, such as to collapse and tunnel, has saved construction investment, it is ensured that construction safety.
Description
Technical field
The present invention relates to a kind of large section, Long span collapse and cave-in granular media tunnel driving method, particularly one kind is applied to
The Tunnel Landslide processing construction of civil engineering and large section, the Long span collapse and cave-in granular media tunnel excavation of design field
Method.
Background technology
During Unfavorable Conditions construction transportation Tunnel Engineering and other underground excavation engineerings, when running into poor enclose
During rock, due to design, supporting parameter is on the weak side or construction method is improper or the reason such as natural calamity is easy to Tunnel Landslide occur and collapses
Fang Maoding, how to handle Tunnel Landslide needs to be determined according to on-site actual situations comprehensive study.When determine Tunnel Landslide handle
After supporting parameter, the digging mode of corresponding supporting parameter how is selected to ensuring at safe construction and effective completion Tunnel Landslide
Reason is particularly critical.Processing scheme of the prior art is：First, first to the loose slag body slip casting inside and outside tunnel excavation contour line
Excavate cavitation again afterwards.This construction method grouting amount is too big, uneconomical.2nd, step excavation, to interim domatic shotcrete branch after excavation
Shield, excavate the gib of discarded last time next time, this construction method technique is cumbersome, and long construction period is uneconomical.Prior art
In also without a kind of not easy for construction, the scope of operation can be effectively increased, save construction investment, it is ensured that tunnel excavation construction safety
Large section, Long span collapse and cave-in granular media tunnel driving method.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of easy for construction, can be effectively increased the scope of operation, save work
Journey is invested, it is ensured that large section, the Long span collapse and cave-in granular media tunnel driving method of tunnel excavation construction safety.
In order to solve the above technical problems, large section, Long span collapse and cave-in granular media tunnel driving method that the present invention uses,
Including following steps：
A, using steelframe joint as boundary, tunnel to be dug is divided into top, top bar, middle step, got out of a predicament or an embarrassing situation and inverted arch five
Individual part；
B, top is excavated, and supporting is carried out to excavating part in digging process；
C, top bar is excavated, and supporting is carried out to excavating part in digging process；
D, step in excavating, and carry out supporting to excavating part in digging process；
E, excavate and get out of a predicament or an embarrassing situation, and supporting is carried out to excavating part in digging process；
F, inverted arch part is excavated, and supporting is carried out to excavating part in digging process.
It is further the method excavated in b step using slope.
It is further, in b step, spray concrete rear enclosed domatic to the interim gravelly soil close to face after excavation
It is further in step c, first to excavate top bar left part, then excavate top bar right part, Ran Houkai
Dig top bar Core Soil part.
It is further, in Step d, step left part in first excavating, then step right part in excavating, Ran Houkai
Step Core Soil part in digging.
It is further in step e, first to excavate left part of getting out of a predicament or an embarrassing situation, then excavates right part of getting out of a predicament or an embarrassing situation, Ran Houkai
Dig down step Core Soil part.
It is further the method excavated in digging process using slope, on the right side of area surface side and top bar
Part sets slope, and the domatic spray concrete of the interim gravelly soil of close face is closed after excavation.
It is further the method excavated in digging process using slope, on the right side of area surface side and middle step
Part sets slope, and the domatic spray concrete of the interim gravelly soil of close face is closed after excavation.
It is further the method excavated in digging process using slope, close to area surface side and right side of getting out of a predicament or an embarrassing situation
Part sets slope, and the domatic spray concrete of the interim gravelly soil of close face is closed after excavation.
It is further that in f steps, inverted arch part is excavated using full width, carries out inverted arch concrete placings after excavation in time and apply
Work.
The beneficial effects of the invention are as follows：Tunnel is divided into top, the step of upper, middle and lower three and inverted arch five by the present invention
Partial hierarchical is excavated, and the self-stable ability of not yet cutouts country rock can be made full use of so in digging process, is ensureing to tie
Reduce gib on the premise of structure safety and stability.The present invention presss from both sides the mechanical property of huge block of stone using loose gravelly soil and shiver stone
Can, the stable face gravelly soil of remaining core soil in advance back-pressure, and excavate and form Core Soil interim stabilization slope ratio, broken according to tunnel excavation
Face size and the slag body self-stable ability that collapses, select rational digging mode, take full advantage of the slag body self-stable ability that collapses, local a small amount of spray
Concrete supporting, large area not supporting, solve the stability problem of face after tunnel excavation well, add the scope of operation, save
About construction investment, it is ensured that tunnel excavation construction safety.
Brief description of the drawings
Fig. 1 is the tunnel excavation transverse cross-sectional view of the present invention；
Fig. 2 is the tunnel excavation longitudinal sectional drawing of the present invention；
Fig. 3 is the tunnel excavation top view of the present invention；
Parts, position and numbering in figure：Top 1, top bar left part 2, top bar right part 3, top bar core
Cubsoil part 4, middle step left part, middle step right part 5, middle step Core Soil part 6 get out of a predicament or an embarrassing situation left part 7, under
Step right part 8, Core Soil part 9 of getting out of a predicament or an embarrassing situation.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Fig. 1 Fig. 2 and Fig. 3, in order to solve the above technical problems, large section, Long span that the present invention uses cave in
Roof fall granular media tunnel driving method, including following steps：
A, using steelframe joint as boundary, tunnel to be dug is divided into top 1, top bar, middle step, got out of a predicament or an embarrassing situation and inverted arch five
Individual part；
B, top 1 is excavated, and supporting is carried out to excavating part in digging process；
C, top bar is excavated, and supporting is carried out to excavating part in digging process；
D, step in excavating, and carry out supporting to excavating part in digging process；
E, excavate and get out of a predicament or an embarrassing situation, and supporting is carried out to excavating part in digging process；
F, inverted arch part 11 is excavated, and supporting is carried out to excavating part in digging process.
The method excavated in b step using slope.
In b step, spray concrete rear enclosed domatic to the interim gravelly soil close to face after excavation
In step c, top bar left part 2 is first excavated, then excavates top bar right part 3, then excavates top bar
Core Soil part 4.
In Step d, step left part 5 in first excavating, then step right part 6 in excavating, step in then excavating
Core Soil part 7.
In step e, left part 8 of getting out of a predicament or an embarrassing situation first is excavated, then excavates right part 9 of getting out of a predicament or an embarrassing situation, then excavates and gets out of a predicament or an embarrassing situation
Core Soil part 10.
The method excavated in digging process using slope, set tiltedly close to area surface side and top bar right part 3
Slope, to close to the domatic spray concrete closing of the interim gravelly soil of face after excavation.
The method excavated in digging process using slope, set tiltedly close to area surface side and middle step right part 6
Slope, to close to the domatic spray concrete closing of the interim gravelly soil of face after excavation.
The method excavated in digging process using slope, set tiltedly close to area surface side and right part 9 of getting out of a predicament or an embarrassing situation
Slope, to close to the domatic spray concrete closing of the interim gravelly soil of face after excavation.
In f steps, inverted arch part 11 is excavated using full width, carries out inverted arch concrete placings construction after excavation in time.
The present invention presss from both sides the mechanical property of huge block of stone, the stable area of remaining core soil in advance back-pressure using loose gravelly soil and shiver stone
Face gravelly soil, and excavate and form Core Soil interim stabilization slope ratio, according to tunnel excavation section size and the slag body self-stable ability that collapses, choosing
Rational digging mode is selected, takes full advantage of the self-stable ability for the slag body that collapses, locally a small amount of spray concrete supporting, large area not supporting, very
The good stability problem for solving face after tunnel excavation, adds the scope of operation, has saved construction investment, it is ensured that tunnel
Excavation construction safety.
Embodiment：
Geological conditions, full section of tunnel are that loose crumb stone and gravelly soil press from both sides huge block of stone and collapsed slag granular media structure, block stone size
Heterogeneity, without cementing between block stone, local to press from both sides mud, local moist shape crevice water, block stone lithology is thin~medium bed, strong~apoplexy
Change rotten sand slate and granite.
Tunnel excavation section size, tunnel cross-section is in 150m2 or so.
Tunnel-liner type, Tunnel Landslide processing liner structure.
As shown in Figure 1, Figure 2 and Figure 3, construction procedure is：
First, top 1 is excavated.Often drilling depth 60cm is excavated in circulation, excavates slope than 1:1.To the interim gravelly soil of face after excavation
Domatic spray C20 concrete thickness 10cm closings；Top 1 excavate and supporting 25m after suspend excavate, top bar left part 2 is opened into figure
Dig.
2nd, top bar left part 2 is excavated.Often drilling depth 60cm is excavated in circulation, close to face side part and right part
Interim slope of excavating is than 1:1, to close to the domatic spray C20 concrete thickness 10cm closings of the interim gravelly soil of face after excavation；Right part is faced
When excavate domatic not supporting.Top bar left part 2 excavate and supporting to the bottom 100cm of top 1 apart from rear suspension of works, enter
Top bar right part 3 is excavated in figure.
3rd, top bar right part 3 is excavated.Often drilling depth 60cm is excavated in circulation, interim close to area surface side and left part
Slope is excavated than 1:1, to close to the domatic spray C20 concrete thickness 10cm closings of the interim gravelly soil in area surface side after excavation；Left part is interim
Excavate domatic not supporting.Top bar right part 3 is excavated and supporting lags suspension of works after top bar left part 250cm.Enter
Enter the soil of top bar Core Soil part 4 in figure to excavate.
4th, top bar Core Soil part 4 is excavated.
Chi is excavated in top bar Core Soil part 4, the interim slope ratio of excavation is consistent with top bar right part 3.Excavation faces
When domatic not supporting.
5th, step left part 5 in excavating.
Often drilling depth 60cm is excavated in circulation, and slope is excavated temporarily than 1 close to area surface side and right part:1, to close after excavation
The domatic spray C20 concrete thickness 10cm closings of the interim gravelly soil of face；Right part excavates domatic not supporting temporarily.Middle step left side
Divide 5 to excavate and supporting 500cm is apart from rear suspension of works, middle step right part 6 is excavated into figure.
6th, step right part 6 in excavating.
Often drilling depth 60cm is excavated in circulation, and slope is excavated temporarily than 1 close to area surface side and left part:1, to close after excavation
The domatic spray C20 concrete thickness 10cm closings of the interim gravelly soil in area surface side；Left part excavates domatic not supporting temporarily.On the right side of middle step
Part 6 excavate and supporting hysteresis in suspension of works after step left part 250cm.The middle core of step Core Soil part 7 into figure
Cubsoil excavates.
7th, step Core Soil part 7 in excavating.
Size is excavated in middle step Core Soil part 7, the interim slope ratio of excavation is consistent with middle step right part 6.Excavate
Interim domatic not supporting.
8th, left part 8 of getting out of a predicament or an embarrassing situation is excavated.
Often drilling depth 60cm is excavated in circulation, and slope is excavated temporarily than 1 close to area surface side and right part:1, to close after excavation
The domatic spray C20 concrete thickness 10cm closings of the interim gravelly soil of face；Right part excavates domatic not supporting temporarily.Get out of a predicament or an embarrassing situation left side
Divide 8 to excavate and supporting 500cm excavates apart from rear suspension of works, right part of being got out of a predicament or an embarrassing situation into figure 9.
9th, right part 9 of getting out of a predicament or an embarrassing situation is excavated.
Often drilling depth 60cm is excavated in circulation, and slope is excavated temporarily than 1 close to face side part and left part:1, it is right after excavation
Close to the domatic spray C20 concrete thickness 10cm closings of the interim gravelly soil in area surface side；Left part excavates domatic not supporting temporarily.Get out of a predicament or an embarrassing situation
Right part 9 is excavated and supporting lags suspension of works after the left part 250cm that gets out of a predicament or an embarrassing situation.10. portion's Core Soil excavates into figure.
Tenth, Core Soil part 10 of getting out of a predicament or an embarrassing situation is excavated
The excavation drilling depth of Core Soil part 10, the same right part 9 of getting out of a predicament or an embarrassing situation of the interim slope ratio of excavation of getting out of a predicament or an embarrassing situation are consistent.Open
Dig interim domatic not supporting.
11, inverted arch part 11 is excavated
Tunneling inverted arch part 11 again after being penetrated Deng tunnel excavation.Inverted arch part 11 is excavated using full width, and often circulation is opened
Length 10m is dug, the construction of inverted arch concrete placings is completed in time after excavation.
According to sequence described above and require cycle operation, you can complete the excavation and support work in whole tunnels.
Claims (7)
1. large section, Long span collapse and cave-in granular media tunnel driving method, it is characterised in that：Including following steps：
A, using steelframe joint as boundary, tunnel to be dug is divided into top (1), top bar, middle step, got out of a predicament or an embarrassing situation and inverted arch five
Part；
B, top (1) is excavated, and supporting is carried out to excavating part in digging process；
C, top bar is excavated, first excavates top bar left part (2), then excavates top bar right part (3), then excavates and appears on the stage
Rank Core Soil part (4), and carry out supporting to excavating part in digging process；
D, step in excavating, step left part (5) in first excavating, then step right part (6) in excavating, platform in then excavating
Rank Core Soil part (7), and carry out supporting to excavating part in digging process；
E, excavate and get out of a predicament or an embarrassing situation, first excavate left part (8) of getting out of a predicament or an embarrassing situation, then excavate right part of getting out of a predicament or an embarrassing situation (9), then excavate and leave office
Rank Core Soil part (10), and carry out supporting to excavating part in digging process；
F, inverted arch part (11) are excavated, and supporting is carried out to excavating part in digging process.
2. large section as claimed in claim 1, Long span collapse and cave-in granular media tunnel driving method, it is characterised in that：Walked in b
The method excavated in rapid using slope.
3. large section as claimed in claim 1, Long span collapse and cave-in granular media tunnel driving method, it is characterised in that：Walked in b
In rapid, spray concrete rear enclosed domatic to the interim gravelly soil close to face after excavation.
4. large section as claimed in claim 1, Long span collapse and cave-in granular media tunnel driving method, it is characterised in that：Opening
The method excavated during digging using slope, right behind area surface side and top bar right part (3) setting slope, excavation
Close to the domatic spray concrete closing of the interim gravelly soil of face.
5. large section as claimed in claim 1, Long span collapse and cave-in granular media tunnel driving method, it is characterised in that：Opening
The method excavated during digging using slope, right behind area surface side and middle step right part (6) setting slope, excavation
Close to the domatic spray concrete closing of the interim gravelly soil of face.
6. large section as claimed in claim 1, Long span collapse and cave-in granular media tunnel driving method, it is characterised in that：Opening
The method excavated during digging using slope, right behind area surface side and right part of getting out of a predicament or an embarrassing situation (9) setting slope, excavation
Close to the domatic spray concrete closing of the interim gravelly soil of face.
7. large section as claimed in claim 1, Long span collapse and cave-in granular media tunnel driving method, it is characterised in that：Walked in f
In rapid, inverted arch part (11) are excavated using full width, carry out inverted arch concrete placings construction after excavation in time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699387.4A CN104500076B (en) | 2014-11-26 | 2014-11-26 | Large section, Long span collapse and cave-in granular media tunnel driving method |
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|---|---|---|---|
| CN201410699387.4A CN104500076B (en) | 2014-11-26 | 2014-11-26 | Large section, Long span collapse and cave-in granular media tunnel driving method |
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| Publication Number | Publication Date |
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| CN104500076A CN104500076A (en) | 2015-04-08 |
| CN104500076B true CN104500076B (en) | 2017-11-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863677B (en) * | 2016-04-12 | 2018-11-13 | 中国电建集团成都勘测设计研究院有限公司 | The reinforcement means of Tunnel |
| CN106351671B (en) * | 2016-10-17 | 2019-02-15 | 中铁五局集团第五工程有限责任公司 | A kind of weak surrounding rock large section tunnel excavation supporting structure and its construction method |
| CN108131145B (en) * | 2017-12-20 | 2020-03-24 | 中铁五局集团有限公司 | Construction method for ultra-large-span tunnel excavation support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101725149B (en) * | 2009-12-15 | 2011-01-26 | 中铁二局股份有限公司 | Construction method of long open-cut tunnel |
| CN101858220B (en) * | 2010-05-28 | 2012-02-22 | 深圳市建设（集团）有限公司 | Tunnel double upper sidewall heading construction method |
| CN102071947B (en) * | 2011-01-21 | 2013-02-06 | 中交四航局第一工程有限公司 | Construction method for soft surrounding rock section of large-span tunnel portal |
| CN102606162B (en) * | 2012-02-08 | 2014-09-17 | 中铁四局集团第二工程有限公司 | Quick construction method for weak surrounding rock shallowly-buried easily-collapsed area of tunnel |
| CN102562075B (en) * | 2012-03-09 | 2014-06-11 | 中交第二公路工程局有限公司 | Large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method |
| CN103510959B (en) * | 2013-09-13 | 2015-12-02 | 北京交通大学 | A kind of Shallow-buried Large-span small interval loess tunnel excavation technology |
| CN103628886A (en) * | 2013-11-28 | 2014-03-12 | 中铁十三局集团有限公司 | Method for excavating weak surrounding rock tunnel under water-rich high-ground-stress conditions |
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