CN110295925A - Red beds sand shale serious deformation paragraph construction method - Google Patents
Red beds sand shale serious deformation paragraph construction method Download PDFInfo
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- CN110295925A CN110295925A CN201810232753.3A CN201810232753A CN110295925A CN 110295925 A CN110295925 A CN 110295925A CN 201810232753 A CN201810232753 A CN 201810232753A CN 110295925 A CN110295925 A CN 110295925A
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- Prior art keywords
- deformation
- inverted arch
- top bar
- paragraph
- horizontal displacement
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- 238000010276 construction Methods 0.000 title claims abstract description 26
- 239000004576 sand Substances 0.000 title claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 239000011435 rock Substances 0.000 claims description 14
- 238000009412 basement excavation Methods 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 9
- 239000011150 reinforced concrete Substances 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 4
- 241000209202 Bromus secalinus Species 0.000 claims 1
- 239000010410 layer Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000004575 stone Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007363 ring formation reaction Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Red beds sand shale serious deformation paragraph construction method reduces construction delay risk effectively to avoid constructing tunnel from large deformation and landslide occur, improves construction efficiency.Carry out the test of large deformation section according to monitoring measurement situation and construction section deformation, increase deformation allowance, it adjusts supporting parameter and reinforces preliminary bracing, excavated section ratio of rise to span is adjusted according to vault sinking, horizontal displacement and inverted arch deformation, determines large deformation paragraph excavated section.Ratio of rise to span is adjusted to about 0.5, when horizontal displacement be worth larger and vault sinking value relative horizontal displacement value it is smaller, without inverted arch deformation when, large deformation paragraph excavated section is determined as semicircle；When vault sinking, horizontal displacement, inverted arch protuberance value are larger, large deformation paragraph excavated section is determined as circle.
Description
Technical field
The present invention relates to tunnels, in particular to especially relate to the red beds sand shale for passing through the western regions of the Yunnan Province mud stone burning into sand rock of Hengduan mountain range
Serious deformation paragraph construction method.
Background technique
Southwestern China area Hengduan mountain range complex formation, structure development, the wherein road the Jurassic system Ba Zhu group mud stone of the Mesozoic group
Burning into sand rock, aubergine, light violet magenta, part press from both sides canescence quartz, gypsum, argillaceous texture, thin layer columnar structure.Rock mass is smashed to pieces,
Stability is very poor, and rock mass is in dust shape and earthy, and rock stratum face is smooth, because it is based on red, is commonly called as " red beds ", and thickness is from hundred
Rice is to upper km etc..
" red beds " based on mud stone and packsand, it is particular in that: mud stone matter is soft, and weatherability is weak, meets water
Easily intensity is substantially reduced after softening, chance water, and inter-layer bonding force weakens, bad stability.If opening " red beds " time is long, will
Loss of stability, chip off-falling are collapsed seriously, and the accidents such as large deformation, landslide easily occur for tunnel excavation, or even cause shutdown accident.
As the planning of China's Trans-Asia railway and Yunnan Province's western regions railway is built, the special geology of Hengduan mountain range is passed through
Red bed in Wwest Yunnan tunnel will gradually increase.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of red beds sand shale serious deformation paragraph construction method, with
It effectively avoids constructing tunnel from large deformation and landslide occur, reduces construction delay risk, improve construction efficiency.
The technical solution adopted by the present invention to solve the technical problems is as follows:
Red beds sand shale serious deformation paragraph construction method of the invention, includes the following steps:
(1) test of large deformation section is carried out according to monitoring measurement situation and construction section deformation, increases deformation allowance,
Adjust supporting parameter reinforce preliminary bracing, according to vault sinking, horizontal displacement and inverted arch deformation adjust excavated section arrow across
Than determining large deformation paragraph excavated section；
(2) arch advance support is applied, as support system is excavated, increases deformation allowance to discharge surrouding rock stress, so
Afterwards using mechanical partial excavation top bar arc leading pit arch, top bar arc leading pit left side and top bar arc leading pit right side
Portion reserves top bar Core Soil portion, applies top bar preliminary bracing and top bar lock foot device；
(3) the interim inverted arch of top bar is arranged in mechanical excavation top bar Core Soil portion；
(4) prestress anchorage cable is applied along top bar preliminary bracing is circumferentially-spaced；
(5) faulting of slab ends mechanical excavation is got out of a predicament or an embarrassing situation left side, right side of getting out of a predicament or an embarrassing situation, and applies preliminary bracing of getting out of a predicament or an embarrassing situation；
(6) inverted arch portion is excavated, inverted arch preliminary bracing and inverted arch and short abutment wall reinforced concrete lining layer are applied；
(7) inverted arch fill concrete is applied；
(8) arch wall reinforced concrete lining layer is applied.
In the step (1), excavated section ratio of rise to span is adjusted to about 0.5；When horizontal displacement is worth larger and vault sinking value
Relative horizontal displacement value is smaller, without inverted arch deformation when, large deformation paragraph excavated section is determined as semicircle；When vault sinking, water
When prosposition moves, inverted arch protuberance value is larger, large deformation paragraph excavated section is determined as circle.
The invention has the advantages that carrying out test, adjustment according to monitoring measurement situation and paragraph deformation of having constructed
Excavated section ratio of rise to span is increased deformation allowance to discharge surrouding rock stress, is dropped using mechanical excavation to improve preliminary bracing stress
Low to disturb to weak red bed in Wwest Yunnan country rock, remaining core soil in advance reduces face landslide risk；Using bucket step plus interim inverted arch,
Top bar applies the control of prestress anchorage cable bout length in 10m or so to reduce prestress anchorage cable process circulation time, seals in time
Cyclization is closed, the timely stress of prestress anchorage cable is avoided because of Stress relieving of surrounding rocks, and horizontal stress surge causes preliminary bracing seriously to become
Shape improves construction efficiency to reduce construction delay risk, safe and smooth to pass through red bed in Wwest Yunnan sand shale serious deformation section
It falls.
Detailed description of the invention
This specification includes such as five width attached drawings:
Fig. 1 is excavated section ratio of rise to span schematic diagram in red beds sand shale serious deformation paragraph construction method of the present invention；
Fig. 2 is excavated section ratio of rise to span schematic diagram in red beds sand shale serious deformation paragraph construction method of the present invention；
Fig. 3 is to add interim inverted arch to be arranged using bucket step in red beds sand shale serious deformation paragraph construction method of the present invention
The working procedure cross-sectional view of prestress anchorage cable；
Fig. 4 is to add interim inverted arch to be arranged using bucket step in red beds sand shale serious deformation paragraph construction method of the present invention
The working procedure skiagraph of prestress anchorage cable；
Fig. 5 is to add interim inverted arch to be arranged using bucket step in red beds sand shale serious deformation paragraph construction method of the present invention
The working procedure plan view of prestress anchorage cable；
Component, toponym and corresponding label be shown in figure: arch advance support 1, top bar arc leading pit arch 2a,
Top bar arc leading pit left side 2b, top bar arc leading pit right side 2c, top bar preliminary bracing 3, top bar lock foot device
3a, top bar Core Soil portion 4, the interim inverted arch 5 of top bar, prestress anchorage cable 6, the left side 7a that gets out of a predicament or an embarrassing situation, the right side 7b that gets out of a predicament or an embarrassing situation,
Get out of a predicament or an embarrassing situation preliminary bracing 8, inverted arch portion 9, inverted arch preliminary bracing 10, inverted arch and short abutment wall reinforced concrete lining layer 11, inverted arch filling
Concrete 12, arch wall reinforced concrete lining layer 13.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Referring to figs. 1 to Fig. 5, red beds sand shale serious deformation paragraph construction method of the invention includes the following steps:
(1) test of large deformation section is carried out according to monitoring measurement situation and construction section deformation, increases deformation allowance,
Adjust supporting parameter reinforce preliminary bracing, according to vault sinking, horizontal displacement and inverted arch deformation adjust excavated section arrow across
Than determining large deformation paragraph excavated section；
(2) arch advance support 1 is applied, as support system is excavated, increases deformation allowance to discharge surrouding rock stress, so
Afterwards using mechanical partial excavation top bar arc leading pit arch 2a, top bar arc leading pit left side 2b and top bar arc leading pit
Right side 2c reserves top bar Core Soil portion 4, applies top bar preliminary bracing 3 and top bar lock foot device 3a；
(3) the interim inverted arch 5 of top bar is arranged in mechanical excavation top bar Core Soil portion 4；
(4) prestress anchorage cable 6 is applied along top bar preliminary bracing 3 is circumferentially-spaced；
(9) faulting of slab ends mechanical excavation get out of a predicament or an embarrassing situation left side 7a, get out of a predicament or an embarrassing situation right side 7b, apply preliminary bracing 8 of getting out of a predicament or an embarrassing situation；
(10) inverted arch portion 9 is excavated, inverted arch preliminary bracing 10 and inverted arch and short abutment wall reinforced concrete lining layer 11 are applied；
(11) inverted arch fill concrete 12 is applied；
(12) arch wall reinforced concrete lining layer 13 is applied.
In the step (1), excavated section ratio of rise to span is adjusted to about 0.5；When horizontal displacement is worth larger and vault sinking value
Relative horizontal displacement value is smaller, without inverted arch deformation when, large deformation paragraph excavated section is determined as semicircle；When vault sinking, water
When prosposition moves, inverted arch protuberance value is larger, large deformation paragraph excavated section is determined as circle.
The present invention improves preliminary bracing stress by adjusting excavated section ratio of rise to span, increases arch advance support prearrangement of deformation amount
Amount is reduced using mechanical excavation and is disturbed to weak red bed in Wwest Yunnan country rock to discharge surrouding rock stress, and remaining core soil in advance reduces area
Face landslide risk.Using bucket step plus interim inverted arch, top bar applies the control of prestress anchorage cable bout length in 10m or so to subtract
Few prestress anchorage cable process circulation time, closing cyclization, the timely stress of prestress anchorage cable are avoided because of Stress relieving of surrounding rocks in time,
Horizontal stress surge causes preliminary bracing severely deformed, to reduce construction delay risk, improves construction efficiency, safe and smooth logical
Cross red bed in Wwest Yunnan sand shale serious deformation paragraph.
Claims (2)
1. red beds sand shale serious deformation paragraph construction method, includes the following steps:
(1) test of large deformation section is carried out according to monitoring measurement situation and construction section deformation, increases deformation allowance, adjustment
Supporting parameter reinforces preliminary bracing, adjusts excavated section ratio of rise to span according to vault sinking, horizontal displacement and inverted arch deformation, really
Determine large deformation paragraph excavated section；
(2) arch advance support (1) is applied, as support system is excavated, increases deformation allowance to discharge surrouding rock stress, then
It is led using mechanical partial excavation top bar arc leading pit arch (2a), top bar arc leading pit left side (2b) and top bar arc
It cheats right side (2c), reserves top bar Core Soil portion (4), apply top bar preliminary bracing (3) and top bar lock foot device (3a)；
(3) mechanical excavation top bar Core Soil portion (4) is arranged the interim inverted arch of top bar (5)；
(4) prestress anchorage cable (6) are applied along top bar preliminary bracing (3) is circumferentially-spaced；
(5) faulting of slab ends mechanical excavation is got out of a predicament or an embarrassing situation left side (7a), right side of getting out of a predicament or an embarrassing situation (7b), applies preliminary bracing of getting out of a predicament or an embarrassing situation (8)；
(6) inverted arch portion (9) are excavated, applies inverted arch preliminary bracing (10) and inverted arch and short abutment wall reinforced concrete lining layer (11)；
(7) inverted arch fill concrete (12) are applied；
(8) arch wall reinforced concrete lining layer (13) are applied.
2. red beds sand shale serious deformation paragraph construction method as described in claim 1, it is characterized in that: the step (1)
In, excavated section ratio of rise to span is adjusted to about 0.5；When horizontal displacement be worth larger and vault sinking value relative horizontal displacement value it is smaller,
When no inverted arch deforms, large deformation paragraph excavated section is determined as semicircle；When vault sinking, horizontal displacement, inverted arch protuberance value are equal
When larger, large deformation paragraph excavated section is determined as circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232753.3A CN110295925A (en) | 2018-03-21 | 2018-03-21 | Red beds sand shale serious deformation paragraph construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232753.3A CN110295925A (en) | 2018-03-21 | 2018-03-21 | Red beds sand shale serious deformation paragraph construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110295925A true CN110295925A (en) | 2019-10-01 |
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ID=68025261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810232753.3A Pending CN110295925A (en) | 2018-03-21 | 2018-03-21 | Red beds sand shale serious deformation paragraph construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN110295925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020253001A1 (en) * | 2019-06-19 | 2020-12-24 | 中铁十九局集团第六工程有限公司 | Two-step fast closed tunnel support structure having inverted arch and construction method therefor |
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| JP2005256389A (en) * | 2004-03-11 | 2005-09-22 | Kajima Corp | Intermediate unit with excavating mechanism and method for assembling excavator |
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| CN204609900U (en) * | 2015-05-15 | 2015-09-02 | 河北腾是达金属结构有限公司 | A kind of corrugated steel preliminary bracing structure being applicable to benching tunnelling method excavation |
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| CN205638495U (en) * | 2016-05-25 | 2016-10-12 | 中铁十六局集团北京轨道交通工程建设有限公司 | I -shaped supporting construction suitable for construction of CRD worker's method |
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2018
- 2018-03-21 CN CN201810232753.3A patent/CN110295925A/en active Pending
Patent Citations (5)
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| JP2005256389A (en) * | 2004-03-11 | 2005-09-22 | Kajima Corp | Intermediate unit with excavating mechanism and method for assembling excavator |
| CN102926757A (en) * | 2012-09-07 | 2013-02-13 | 中铁五局（集团）有限公司 | Construction method of two-sidestep and four-step excavation support of weak large-span tunnel of mountain ridge |
| CN204609900U (en) * | 2015-05-15 | 2015-09-02 | 河北腾是达金属结构有限公司 | A kind of corrugated steel preliminary bracing structure being applicable to benching tunnelling method excavation |
| CN105201532A (en) * | 2015-09-11 | 2015-12-30 | 中铁九局集团第二工程有限公司 | Ring excavation construction method for underground large-span spherical-cap-shaped dome under weak surrounding rock |
| CN205638495U (en) * | 2016-05-25 | 2016-10-12 | 中铁十六局集团北京轨道交通工程建设有限公司 | I -shaped supporting construction suitable for construction of CRD worker's method |
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| 汪耀等: "鹧鸪山高地应力软岩隧道大变形预测与施工技术研究", 《路基工程》 * |
Cited By (3)
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|---|---|---|---|---|
| WO2020253001A1 (en) * | 2019-06-19 | 2020-12-24 | 中铁十九局集团第六工程有限公司 | Two-step fast closed tunnel support structure having inverted arch and construction method therefor |
| JP2022500579A (en) * | 2019-06-19 | 2022-01-04 | 中鉄十九局集団第六工程有限公司China Railway 19Th Bureau Group Sixth Engineering Co., Ltd. | Support structure of two-stage high-speed closed tunnel with reverse arch and its construction method |
| JP7125550B2 (en) | 2019-06-19 | 2022-08-24 | 中鉄十九局集団第六工程有限公司 | SUPPORT STRUCTURE AND CONSTRUCTION METHOD FOR TWO-STAGE HIGH-SPEED CLOSING TUNNEL WITH INVERTED ARCH |
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Application publication date: 20191001 |
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