CN102953737B - Construction method for inverted arch of VI-level water-enriched surrounding rock tunnel - Google Patents
Construction method for inverted arch of VI-level water-enriched surrounding rock tunnel Download PDFInfo
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- CN102953737B CN102953737B CN201210403804.7A CN201210403804A CN102953737B CN 102953737 B CN102953737 B CN 102953737B CN 201210403804 A CN201210403804 A CN 201210403804A CN 102953737 B CN102953737 B CN 102953737B
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Abstract
The invention belongs to the technical field of tunnel construction, and in particular relates to a construction method for an inverted arch of a VI-level water-enriched surrounding rock tunnel, which aims to solve the problems of low efficiency and high safety hazard in construction of the inverted arch of the VI-level water-enriched surrounding rock tunnel. The construction method comprises the following steps of: reinforcing a tunnel face of a lower bench temporarily, laying a layer of counter pressing rubbles on a to-be-excavated inverted arch section, and constructing steel plate piles on one side close to the tunnel face; excavating a first section of the inverted arch, erecting an inverted arc trestle bridge, and constructing preliminary bracing for the first section of the inverted arc; excavating a second section of the inverted arch, constructing preliminary bracing for the second section of the inverted arch, and meanwhile, constructing a tunnel lining for the inverted arch; filling the constructed inverted arch; and removing the steel plate piles. The construction method provided by the invention has the beneficial effects that the construction safety is high, and the hazard of tunnel face sloughing of the tunnel is lowered effectively; and the method is simple, is easy to organize, and improves a construction progress effectively on the premise of ensuring a safe step pitch.
Description
Technical field
The invention belongs to the technical field of constructing tunnel, what be specifically related to is a kind of VI grade of rich water surrounding rock tunnel inverted arch construction method.
Background technology
VI grade of rich water surrounding rock tunnel many employings CRD method is excavated, according to the related request of the Ministry of Railways to tunnel safety, inverted arch preliminary bracing and face distance must not be greater than 35m, inverted arch often circulate excavation drilling depth can not be greater than 3m, therefore inverted arch operation side distance bottom excavation face distance is very near, moulds shape, do not have self-stable ability because VI grade of rich water country rock belongs to stream, inverted arch excavation probably causes face wall rock destabilization, causes face to cave in.Usually adopt Full-face pouring at VI grade of country rock paragraph, pre-reinforcement is carried out to country rock, makes its consolidation, increase stabilizing power.But carry out slip casting at rich water paragraph, actual effect is not good, still the situation of face wall rock destabilization is often there is in inverted arch digging process, and when inverted arch excavates, because stream moulds the instability of shape country rock, there is the situation that excavation face is constantly caved in, along with constantly caving in of excavation face, inverted arch forming difficulty, inefficiency, and usually excavation drilling depth can exceed standard, and forms potential danger.
Summary of the invention
The object of the invention is to solve inefficiency in VI grade of rich water surrounding rock tunnel inverted arch construction, the problem that security risk is high, provide a kind of method of VI grade of rich water surrounding rock tunnel inverted arch construction, make construction safety controlled, efficiency is high.
The present invention adopts following technical scheme to realize:
VI grade of rich water surrounding rock tunnel inverted arch construction is constructed according to following step: 1. carry out temperature pier to face of getting out of a predicament or an embarrassing situation; 2. treating that excavation inverted arch section lays one deck back-pressure slabstone, be greater than two ring inverted arch excavation drilling depths and close face side Vertical tunnel axis construction steel sheet pile; Point 3. about, width carries out first inverted arch excavation, erection inverted arch trestle; 4. provisional protection is carried out, first inverted arch preliminary bracing of constructing, the interim median septum of spreading to the interim side slope that excavation is formed; Point 5. about, width carries out second inverted arch excavation; 6. construction second inverted arch preliminary bracing, the interim median septum of spreading; 7. to construct first, second inverted arch reinforcing bar simultaneously, formwork erection, installation seam waterstop, construction inverted arch lining cutting, construction inverted arch is filled; 8. pull out steel sheet pile, enter the construction of next circulation inverted arch.
VI grade of rich water surrounding rock tunnel inverted arch steel sheet pile used of constructing can adopt shaped steel to substitute.The degree of depth of steel sheet pile inserted to play obtains by calculating according to geological conditions and construction condition.
In VI grade of rich water surrounding rock tunnel inverted arch construction, every ring inverted arch excavation drilling depth can adjust according to geological conditions, and its scope is 1-3m.
Adopt sprayed mortar or slip casting or Bolt net and jet mode to the provisional protection of face and interim side slope in VI grade of rich water surrounding rock tunnel inverted arch construction, interim slope gradient is determined according to geological conditions, and ratio of slope is 1:1 ~ 1:15.
The present invention has following beneficial effect:
1, working security is high, effectively reduces the risk of tunnel tunnel face sloughing;
2, method is simple, is easy to tissue, effectively improves construction speed under meeting the prerequisite of safe step pitch.
Accompanying drawing explanation
Fig. 1 is VI grade of rich water surrounding rock tunnel construction cross-sectional drawing,
Fig. 2 is VI grade of rich water surrounding rock tunnel construction skiagraph,
Fig. 3 is VI grade of rich water surrounding rock tunnel construction plan,
Fig. 4 is VI grade of rich water surrounding rock tunnel inverted arch construction sequence one schematic diagram,
Fig. 5 is VI grade of rich water surrounding rock tunnel inverted arch construction sequence two schematic diagram,
Fig. 6 is VI grade of rich water surrounding rock tunnel inverted arch construction sequence three schematic diagram,
Fig. 7 is VI grade of rich water surrounding rock tunnel inverted arch construction sequence four schematic diagram,
Fig. 8 is VI grade of rich water surrounding rock tunnel inverted arch construction sequence five schematic diagram,
Fig. 9 is VI grade of rich water surrounding rock tunnel inverted arch construction sequence six schematic diagram,
Figure 10 is VI grade of rich water surrounding rock tunnel inverted arch construction sequence seven schematic diagram,
In figure: 1-1 portion excavates, 2-2 portion excavates, and 3-3 portion excavates, and 4-4 portion excavates, 5-5 portion excavates, and 6-6 portion excavates, and 7-inverted arch excavates, the preliminary bracing of 8-arch wall, 9-arch wall secondary lining, the preliminary bracing of 10-inverted arch, the lining cutting of 11-inverted arch, 12-inverted arch is filled, 13-steel sheet pile, 14-advance support, 15-preliminary bracing steel arch-shelf, the interim side slope of 16-, 17-first inverted arch excavation, 18-second inverted arch excavation, the interim median septum of 19-, 20-inverted arch trestle, 21-system anchor bolt, 22-back-pressure slabstone.
Detailed description of the invention
By reference to the accompanying drawings the specific embodiment of the present invention is described further:
Work progress of the present invention: 1. temperature pier is carried out to face of getting out of a predicament or an embarrassing situation, temperature pier adopts sprayed mortar or slip casting or Bolt net and jet mode; 2. treating that excavation inverted arch section lays one deck back-pressure slabstone, be convenient to mechanical work, be greater than two ring inverted arch excavation drilling depths and close face side Vertical tunnel axis construction steel sheet pile, steel sheet pile can adopt shaped steel to substitute, the degree of depth of steel sheet pile inserted to play obtains by calculating according to geological conditions and construction condition, and computational methods those skilled in the art can be known from prior art; Point 3. about, width carries out first inverted arch excavation, and erection inverted arch trestle recovers current, and every ring inverted arch excavation drilling depth can adjust according to geological conditions, and its scope is between 1-3m; 4. provisional protection is carried out to the interim side slope that excavation is formed, adopt sprayed mortar or slip casting or Bolt net and jet mode to the provisional protection of interim side slope, interim slope gradient is determined according to geological conditions, and ratio of slope is between 1:1 ~ 1:15, to construct first inverted arch preliminary bracing, the interim median septum of spreading; Point 5. about, width carries out second inverted arch excavation; 6. construction second inverted arch preliminary bracing, the interim median septum of spreading; 7. to construct first, second inverted arch reinforcing bar simultaneously, formwork erection, installation seam waterstop, construction inverted arch lining cutting, construction inverted arch is filled; 8. pull out steel sheet pile, enter the construction of next circulation inverted arch.
Embodiment: for a certain tunnel invert construction of wide pearl railway, tunnel is VI grade of rich water country rock, constructs according to following construction method.
Carry out sprayed mortar 10cm to lower step face to close, applying inverted arch lining cutting termination 9m scope laying slabstone forward, at distance inverted arch lining cutting 9m place construction steel sheet pile, steel sheet pile degree of depth 5m, the inverted arch within the scope of the inverted arch lining cutting termination 3-6m that about point, width digging distance applies, excavates interim slope gradient 1:1, carry out sprayed mortar 8cm to interim side slope to close, erection inverted arch trestle, this section of inverted arch preliminary bracing of constructing, spreading median septum.Inverted arch within the scope of the inverted arch lining cutting termination 0-3m that about point, width digging distance applies, this section of inverted arch preliminary bracing of constructing, spreading median septum.Inverted arch reinforcing bar, formwork erection within the scope of the inverted arch lining cutting termination 0-6m that construction distance applies, installation seam waterstop, builds this section of inverted arch lining cutting, builds this section of inverted arch fill concrete.Pull out steel sheet pile, enter the construction of lower circulation inverted arch.
Claims (4)
1. VI grade of rich water surrounding rock tunnel inverted arch construction method, is characterized in that constructing according to following step: 1. carry out temperature pier to face of getting out of a predicament or an embarrassing situation; 2. treating that excavation inverted arch section lays one deck back-pressure slabstone (22), be greater than two ring inverted arch excavation drilling depths and close face side Vertical tunnel axis construction steel sheet pile (13); Point 3. about, width carries out first inverted arch excavation (17), erection inverted arch trestle (20); 4. provisional protection is carried out, first inverted arch preliminary bracing (10) of constructing, the interim median septum of spreading (19) to the interim side slope (16) that excavation is formed; Point 5. about, width carries out second inverted arch excavation (18); 6. construction second inverted arch preliminary bracing (10), the interim median septum of spreading (19); 7. simultaneously construct first, second inverted arch reinforcing bar, formwork erection, installation seam waterstop, construction inverted arch lining cutting (11), construction inverted arch fill (12); 8. pull out steel sheet pile, enter the construction of next circulation inverted arch.
2. VI grade of rich water surrounding rock tunnel inverted arch construction method according to claim 1, is characterized in that steel sheet pile (13) replaces with shaped steel.
3. VI grade of rich water surrounding rock tunnel inverted arch construction method according to claim 1 and 2, is characterized in that every ring inverted arch excavation drilling depth scope is 1-3m.
4. VI grade of rich water surrounding rock tunnel inverted arch construction method according to claim 3, it is characterized in that adopting sprayed mortar or slip casting or Bolt net and jet mode to the provisional protection of face and interim side slope (16), interim side slope (16) ratio of slope is 1:1 ~ 1:15.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210403804.7A CN102953737B (en) | 2012-10-22 | 2012-10-22 | Construction method for inverted arch of VI-level water-enriched surrounding rock tunnel |
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| CN201210403804.7A CN102953737B (en) | 2012-10-22 | 2012-10-22 | Construction method for inverted arch of VI-level water-enriched surrounding rock tunnel |
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| CN102953737A CN102953737A (en) | 2013-03-06 |
| CN102953737B true CN102953737B (en) | 2015-05-13 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103669220A (en) * | 2013-12-17 | 2014-03-26 | 中铁隧道集团二处有限公司 | Installing method for long, large and light-weight heavy-load rail-crossing trestle in tunnel inverted arch construction |
| CN104500093B (en) * | 2014-12-16 | 2017-02-22 | 湖南科技大学 | Method for positioning temporary middle walls in large-section tunnel supporting structure of formation with soft top and hard bottom |
| CN104727303B (en) * | 2015-04-03 | 2016-05-18 | 王燏斌 | I template stake for constructing tunnel |
| CN106812542B (en) * | 2017-01-22 | 2019-11-22 | 济南轨道交通集团有限公司 | It is a kind of using prefabricated components and preceding slotting shield builds the construction method of subway station |
| CN107725073B (en) * | 2017-11-06 | 2024-04-02 | 中建八局第一建设有限公司 | Tunnel construction method based on simple trestle |
| CN108643935A (en) * | 2018-04-27 | 2018-10-12 | 中铁六局集团天津铁路建设有限公司 | The construction method in tunnel under rich water shallow embedding geology |
| JP6573291B1 (en) * | 2018-11-08 | 2019-09-11 | 岐阜工業株式会社 | Tunnel pier equipment |
| CN109578008B (en) * | 2018-11-27 | 2020-02-04 | 中铁十一局集团第五工程有限公司 | Opposite logistics method for tunnel inverted arch double trestle |
| CN110630329B (en) * | 2019-09-09 | 2021-10-22 | 中国铁道科学研究院集团有限公司电子计算技术研究所 | Early warning method and device for tunnel excavation safety step |
| CN112880762B (en) * | 2021-02-19 | 2021-09-24 | 四川省水文水资源勘测局 | Flow measurement method for water diversion and greening in arid region |
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| KR20060084203A (en) * | 2005-01-19 | 2006-07-24 | 주식회사 하이콘엔지니어링 | Method for constructing 2-arch tunnel using steel pile support |
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| CN101105131A (en) * | 2007-08-17 | 2008-01-16 | 中铁十二局集团有限公司 | Tunnel dredging method suitable for railway large section IV, V class rock tunnel |
| CN101251014A (en) * | 2008-04-14 | 2008-08-27 | 中铁隧道集团有限公司 | Method for wholly mining tunnel invert foundation separating segment and placing concrete as well as inverted arch trestle device |
| CN102562075A (en) * | 2012-03-09 | 2012-07-11 | 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 |
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Effective date of registration: 20170301 Address after: 030001 Taiyuan City, Shanxi meet the main street, No. 269 Patentee after: China Railway Third Engineering Co., Ltd. Patentee after: Three bridge and Tunnel Engineering Co. Ltd. group Address before: 030001 Yingze street, Shanxi, No. 269, No. Patentee before: China Railway Third Engineering Co., Ltd. |
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Address after: 030001 Yingze street, Shanxi, No. 269, No. Co-patentee after: Three bridge and Tunnel Engineering Co. Ltd. group Patentee after: China Railway Third Engineering Co., Ltd. Address before: 030001 Taiyuan City, Shanxi meet the main street, No. 269 Co-patentee before: Three bridge and Tunnel Engineering Co. Ltd. group Patentee before: China Railway Third Engineering Co., Ltd. |