CN101906974A - Supporting structure of extra-large cross-section loess tunnel and construction method thereof - Google Patents
Supporting structure of extra-large cross-section loess tunnel and construction method thereof Download PDFInfo
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- CN101906974A CN101906974A CN 201010248504 CN201010248504A CN101906974A CN 101906974 A CN101906974 A CN 101906974A CN 201010248504 CN201010248504 CN 201010248504 CN 201010248504 A CN201010248504 A CN 201010248504A CN 101906974 A CN101906974 A CN 101906974A
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Abstract
The invention relates to a supporting structure of an extra-large cross-section loess tunnel and a construction method thereof. Larger deformation and even collapse accidents occur in the construction process of the loess tunnel easily. At present, aiming at the large cross-section loess tunnels, the construction of the large cross-section loess tunnel with the excavating area of 140 m<2> is realized by a reserved core soil short step method successfully; the construction of a new loess tunnel with the burial depth of 25 m and the excavating area of 120 m<2> under-passing the existing railway is realized by a CRD method; and the difficulty and the risk of the construction increase gradually along with further increment of the excavated cross-section of the loess tunnel. The supporting structure comprises an initial support, an archwall secondary lining and an inverted arch, wherein a small conduit leading support is arranged along the contour line of the tunnel arch part; and a waterproof layer is arranged between the initial support and the archwall secondary lining. The supporting structure and the construction method thereof have the advantages of effective guarantee of construction safety of the extra-large cross-section loess tunnel, simple construction process, large excavating space, convenient operation for a large-size machine and fast tunnel construction progress.
Description
Technical field
The present invention relates to tunnel-like, be specifically related to a kind of supporting and protection structure and job practices thereof of extra-large cross-section loess tunnel.
Background technology
Moderate finite deformation even landslide accident easily take place in the loess tunnel construction process, and current, at large-section loess tunnel, successful Application is reserved the short benching tunnelling method of core soil and is solved excavation area 140m
2The construction of large-section loess tunnel, and adopt the CRD method to solve buried depth 25m, excavation area 120m
2New loess tunnel under wear existing railway construction.Along with the further increasing of loess tunnel excavated section, it is big that its difficulty of construction and risk also progressively become.Though side heading method can be controlled sedimentation effectively, but construction step preface is various, construction space is narrow and small, construction speed is slow, construction costs is higher, especially at long distance, extra-large cross-section loess tunnel group's construction, safe, quick, economic construction be realized, suitable supporting and protection structure measure and reasonable excavation method must be adopted.
Summary of the invention
Technical problem solved by the invention provide a kind of simple in structure, working procedure is simple, the excavation space greatly, effectively guarantees the supporting and protection structure and the job practices thereof of extra-large cross-section loess tunnel construction safety.
For solving above-mentioned technical problem, the technical scheme that the present invention takes:
The present invention includes preliminary bracing, arch wall secondary lining, inverted arch, its special character is: the outline line along the arch, tunnel is provided with the ductule advance support, is provided with waterproofing course between preliminary bracing and the arch wall secondary lining.
Above-mentioned preliminary bracing by the upright profile steel frame of sprayed mortar, frame, set anchor pole and hang steel mesh reinforcement and constitute.
The inverted arch of above-mentioned preliminary bracing partly comprises sprayed mortar and the upright profile steel frame of frame.
Above-mentioned waterproofing course is made of nonwoven and splash guard.
A kind of job practices of supporting and protection structure of extra-large cross-section loess tunnel, its special character is: described job practices realizes by following steps:
(1), along arch, tunnel excavation outline line, perform the ductule advance support;
(2), the excavation of under ductule advance support protection, topping bar and stay core soil, excavate drilling depth is a Pin steelframe distance at every turn, performs the part of topping bar of preliminary bracing then;
(3), excavation central core soil;
(4), get out of a predicament or an embarrassing situation in step and right side in the staggered excavation left side, each excavation is controlled at 1～2 Pin profile steel frame distance, performs the middle step left side of preliminary bracing and the right side part of getting out of a predicament or an embarrassing situation then;
(5), get out of a predicament or an embarrassing situation in step and left side in the staggered excavation right side, each excavation is controlled at 1～2 Pin profile steel frame distance, performs the middle step right side of preliminary bracing and the left part of getting out of a predicament or an embarrassing situation then;
(6), carry out the excavation of the inverted arch part soil body, excavate Pin steelframe distance at every turn, perform the inverted arch part of preliminary bracing then, immediately following performing inverted arch;
(7), perform the waterproofing course between preliminary bracing and arch wall secondary lining, carry out the lining cutting reinforcing bar binding then;
(8), cast arch wall secondary lining.
Compared with prior art, beneficial effect of the present invention:
The present invention is when effectively guaranteeing the extra-large cross-section loess tunnel construction safety, and its working procedure is simple, and the excavation space is big, is convenient to the big machinery operation, and Tunnel Construction Schedule is fast.
Description of drawings
Fig. 1 is a structure cross-sectional drawing of the present invention;
Fig. 2 is a working procedure cross-sectional drawing of the present invention;
Fig. 3 is a working procedure longitudinal plan of the present invention.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the present invention includes preliminary bracing 2, arch wall secondary lining 3, inverted arch 4, be provided with ductule advance support 1 along the outline line of arch, tunnel, be provided with waterproofing course between preliminary bracing 2 and the arch wall secondary lining 3.
The inverted arch of preliminary bracing 2 partly comprises sprayed mortar and the upright profile steel frame of frame.
Waterproofing course is made of nonwoven and splash guard.
Referring to Fig. 2,3, the step of implementing job practices of the present invention is:
(1), along arch, tunnel excavation outline line, perform ductule advance support 1;
(2), 5 the excavation and stay core soil of under ductule advance support 1 protection, topping bar, excavate drilling depth is a Pin steelframe distance at every turn, performs the part of topping bar of preliminary bracing 2 then;
(3), excavation central core soil 6;
(4), step 7 and right side get out of a predicament or an embarrassing situation 10 in the staggered excavation left side, each excavation is controlled at 1～2 Pin profile steel frame distance, performs the middle step left side of preliminary bracing 2 and the right side part of getting out of a predicament or an embarrassing situation then;
(5), step 8 and left side get out of a predicament or an embarrassing situation 9 in the staggered excavation right side, each excavation is controlled at 1～2 Pin profile steel frame distance, performs the middle step right side of preliminary bracing 2 and the left part of getting out of a predicament or an embarrassing situation then;
(6), carry out the excavation of the inverted arch part soil body 11, excavate 5 Pin steelframe distances at every turn, perform the inverted arch part of preliminary bracing 2 then, immediately following performing inverted arch 4;
(7), perform the waterproofing course of 3 of preliminary bracing 2 and arch wall secondary linings, carry out the lining cutting reinforcing bar binding then;
(8), cast arch wall secondary lining 3.
Claims (5)
1. the supporting and protection structure of an extra-large cross-section loess tunnel, comprise preliminary bracing (2), arch wall secondary lining (3), inverted arch (4), it is characterized in that: the outline line along the arch, tunnel is provided with ductule advance support (1), is provided with waterproofing course between preliminary bracing (2) and the arch wall secondary lining (3).
2. the supporting and protection structure of a kind of extra-large cross-section loess tunnel according to claim 1 is characterized in that: described preliminary bracing (2) by sprayed mortar, the upright profile steel frame of frame, set anchor pole and hang steel mesh reinforcement and constitute.
3. the supporting and protection structure of a kind of extra-large cross-section loess tunnel according to claim 1 and 2 is characterized in that: the inverted arch of described preliminary bracing (2) partly comprises sprayed mortar and the upright profile steel frame of frame.
4. the supporting and protection structure of a kind of extra-large cross-section loess tunnel according to claim 3, it is characterized in that: described waterproofing course is made of nonwoven and splash guard.
5. the job practices of the supporting and protection structure of an extra-large cross-section loess tunnel, it is characterized in that: described job practices realizes by following steps:
(1), along arch, tunnel excavation outline line, perform ductule advance support (1);
(2), the excavation of under ductule advance support (1) protection, top bar (5) and stay core soil, excavate drilling depth is a Pin steelframe distance at every turn, performs the part of topping bar of preliminary bracing (2) then;
(3), excavation central core soil (6);
(4), get out of a predicament or an embarrassing situation (10) in step (7) and right side in the staggered excavation left side, each excavation is controlled at 1～2 Pin profile steel frame distance, the middle step left side that performs preliminary bracing (2) then with get out of a predicament or an embarrassing situation the right side part;
(5), get out of a predicament or an embarrassing situation (9) in step (8) and left side in the staggered excavation right side, each excavation is controlled at 1～2 Pin profile steel frame distance, the middle step right side that performs preliminary bracing (2) then with get out of a predicament or an embarrassing situation left part;
(6), carry out the excavation of the inverted arch part soil body (11), each excavation (5) Pin steelframe distance performs the inverted arch part of preliminary bracing (2), then immediately following performing inverted arch (4);
(7), perform the waterproofing course between preliminary bracing (2) and arch wall secondary lining (3), carry out the lining cutting reinforcing bar binding then;
(8), cast arch wall secondary lining (3).
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| CN 201010248504 CN101906974A (en) | 2010-08-09 | 2010-08-09 | Supporting structure of extra-large cross-section loess tunnel and construction method thereof |
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| CN 201010248504 CN101906974A (en) | 2010-08-09 | 2010-08-09 | Supporting structure of extra-large cross-section loess tunnel and construction method thereof |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345463A (en) * | 2011-10-19 | 2012-02-08 | 中交第一公路工程局有限公司 | Support structure for large-span shallow-buried underground tunnel in urban sensitive area |
| CN102392651A (en) * | 2011-11-30 | 2012-03-28 | 中铁五局（集团）有限公司 | Completely weathered granite tunnel excavation construction method |
| CN102562099A (en) * | 2012-03-15 | 2012-07-11 | 中铁二十三局集团第四工程有限公司 | Method for carrying out rapid face excavation construction of loess tunnel by double rows of small conduits |
| CN102606169A (en) * | 2012-03-16 | 2012-07-25 | 铁道部工程管理中心 | Tunnel support method, tunnel support structure and tunnel |
| CN102758638A (en) * | 2012-07-19 | 2012-10-31 | 中铁十六局集团有限公司 | Construction method for CRD (center cross diaphragm) inverted arch |
| CN103774992A (en) * | 2012-10-18 | 2014-05-07 | 中国石油化工股份有限公司 | Driving device of downhole expansion tool for sleeve |
| CN104847374A (en) * | 2015-04-24 | 2015-08-19 | 长安大学 | Soft rock large-deformation tunnel supporting system and construction method thereof |
| CN105114098A (en) * | 2015-06-08 | 2015-12-02 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for treating unfavorable geology segment of diversion tunnel and major-diameter diversion tunnel structure |
| CN105350973A (en) * | 2015-10-08 | 2016-02-24 | 同济大学 | Construction method for large-span section loess tunnel under-crossing highway |
| CN106121661A (en) * | 2016-08-08 | 2016-11-16 | 中铁二局集团有限公司 | A kind of tunnel trunk is by loess separating surface water rich strata construction method |
| CN106761810A (en) * | 2016-11-23 | 2017-05-31 | 长安大学 | A kind of large-deformation tunnel in soft rock supporting structure system and its construction method |
| CN107013222A (en) * | 2017-05-28 | 2017-08-04 | 中铁五局集团有限公司 | A kind of the middle regions of the Yunnan Province red beds tunnel milling digging construction method close to existing railway |
| CN107035383A (en) * | 2017-04-26 | 2017-08-11 | 中铁第勘察设计院集团有限公司 | The supporting construction of extra-large cross-section loess tunnel and its excavation method |
| CN107560510A (en) * | 2017-08-25 | 2018-01-09 | 中铁十二局集团有限公司 | A kind of tunnel big cross section section constructing method and its face blast arrangement |
| CN108005673A (en) * | 2017-12-05 | 2018-05-08 | 中国铁路设计集团有限公司 | A kind of buried Central drain excavation method in tunnel of reserved foundation back-pressure soil |
| CN108412501A (en) * | 2018-02-11 | 2018-08-17 | 中铁十二局集团有限公司 | Under wear oil pipeline shallow depth loess tunnels construction method |
| CN109594995A (en) * | 2019-01-31 | 2019-04-09 | 长安大学 | A kind of Support System in Soft Rock Tunnels micro-disturbance machinery branch driving engineering method |
| CN109763838A (en) * | 2019-03-13 | 2019-05-17 | 中铁第一勘察设计院集团有限公司 | Assembled inverted arch structure and its assembling method suitable for drill+blast tunnel |
| CN110410110A (en) * | 2019-08-23 | 2019-11-05 | 中铁第四勘察设计院集团有限公司 | A kind of large cross-section tunnel composite lining and its construction method |
| CN111734425A (en) * | 2020-07-30 | 2020-10-02 | 中铁隆工程集团有限公司 | Construction method of underground excavation tunnel for downwards passing through airport terminal building |
| CN113464145A (en) * | 2021-07-06 | 2021-10-01 | 北京交通大学 | Excavation construction method for weak surrounding rock large-section tunnel |
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| CN102392651A (en) * | 2011-11-30 | 2012-03-28 | 中铁五局（集团）有限公司 | Completely weathered granite tunnel excavation construction method |
| CN102392651B (en) * | 2011-11-30 | 2014-10-22 | 中铁五局（集团）有限公司 | Completely weathered granite tunnel excavation construction method |
| CN102562099A (en) * | 2012-03-15 | 2012-07-11 | 中铁二十三局集团第四工程有限公司 | Method for carrying out rapid face excavation construction of loess tunnel by double rows of small conduits |
| CN102606169B (en) * | 2012-03-16 | 2014-06-11 | 铁道部工程管理中心 | Tunnel support method, tunnel support structure and tunnel |
| CN102606169A (en) * | 2012-03-16 | 2012-07-25 | 铁道部工程管理中心 | Tunnel support method, tunnel support structure and tunnel |
| CN102758638A (en) * | 2012-07-19 | 2012-10-31 | 中铁十六局集团有限公司 | Construction method for CRD (center cross diaphragm) inverted arch |
| CN102758638B (en) * | 2012-07-19 | 2014-12-10 | 中铁十六局集团地铁工程有限公司 | Construction method for CRD (center cross diaphragm) inverted arch |
| CN103774992A (en) * | 2012-10-18 | 2014-05-07 | 中国石油化工股份有限公司 | Driving device of downhole expansion tool for sleeve |
| CN103774992B (en) * | 2012-10-18 | 2016-01-06 | 中国石油化工股份有限公司 | The drive unit of bloat tool under cased well |
| US9347297B2 (en) | 2012-10-18 | 2016-05-24 | China Petroleum & Chemical Corporation | Downhole casing expansion tool and method of expanding casings using the same |
| CN104847374A (en) * | 2015-04-24 | 2015-08-19 | 长安大学 | Soft rock large-deformation tunnel supporting system and construction method thereof |
| CN105114098A (en) * | 2015-06-08 | 2015-12-02 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for treating unfavorable geology segment of diversion tunnel and major-diameter diversion tunnel structure |
| CN105350973A (en) * | 2015-10-08 | 2016-02-24 | 同济大学 | Construction method for large-span section loess tunnel under-crossing highway |
| CN106121661A (en) * | 2016-08-08 | 2016-11-16 | 中铁二局集团有限公司 | A kind of tunnel trunk is by loess separating surface water rich strata construction method |
| CN106761810B (en) * | 2016-11-23 | 2019-06-11 | 长安大学 | A kind of large-deformation tunnel in soft rock supporting structure system and its construction method |
| CN106761810A (en) * | 2016-11-23 | 2017-05-31 | 长安大学 | A kind of large-deformation tunnel in soft rock supporting structure system and its construction method |
| CN107035383A (en) * | 2017-04-26 | 2017-08-11 | 中铁第勘察设计院集团有限公司 | The supporting construction of extra-large cross-section loess tunnel and its excavation method |
| CN107013222A (en) * | 2017-05-28 | 2017-08-04 | 中铁五局集团有限公司 | A kind of the middle regions of the Yunnan Province red beds tunnel milling digging construction method close to existing railway |
| CN107560510A (en) * | 2017-08-25 | 2018-01-09 | 中铁十二局集团有限公司 | A kind of tunnel big cross section section constructing method and its face blast arrangement |
| CN108005673A (en) * | 2017-12-05 | 2018-05-08 | 中国铁路设计集团有限公司 | A kind of buried Central drain excavation method in tunnel of reserved foundation back-pressure soil |
| CN108412501A (en) * | 2018-02-11 | 2018-08-17 | 中铁十二局集团有限公司 | Under wear oil pipeline shallow depth loess tunnels construction method |
| CN109594995A (en) * | 2019-01-31 | 2019-04-09 | 长安大学 | A kind of Support System in Soft Rock Tunnels micro-disturbance machinery branch driving engineering method |
| CN109763838A (en) * | 2019-03-13 | 2019-05-17 | 中铁第一勘察设计院集团有限公司 | Assembled inverted arch structure and its assembling method suitable for drill+blast tunnel |
| CN109763838B (en) * | 2019-03-13 | 2023-09-15 | 中铁第一勘察设计院集团有限公司 | Assembled inverted arch structure suitable for tunnel by drilling and blasting method and assembling method thereof |
| CN110410110A (en) * | 2019-08-23 | 2019-11-05 | 中铁第四勘察设计院集团有限公司 | A kind of large cross-section tunnel composite lining and its construction method |
| CN111734425A (en) * | 2020-07-30 | 2020-10-02 | 中铁隆工程集团有限公司 | Construction method of underground excavation tunnel for downwards passing through airport terminal building |
| CN113464145A (en) * | 2021-07-06 | 2021-10-01 | 北京交通大学 | Excavation construction method for weak surrounding rock large-section tunnel |
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Application publication date: 20101208 |