CN103244146A - Construction method for steel frame connection in tunnel anchor-plate retaining - Google Patents
Construction method for steel frame connection in tunnel anchor-plate retaining Download PDFInfo
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- CN103244146A CN103244146A CN2013101758661A CN201310175866A CN103244146A CN 103244146 A CN103244146 A CN 103244146A CN 2013101758661 A CN2013101758661 A CN 2013101758661A CN 201310175866 A CN201310175866 A CN 201310175866A CN 103244146 A CN103244146 A CN 103244146A
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Abstract
The invention discloses a construction method for steel frame connection in tunnel anchor-plate retaining. According to the technical scheme, concrete is sprayed initially on the upper portion of a tunnel wall, arch steel frames are installed and fixed by feet locking bolts, the arch steel frames are sequentially connected through inclined cross connecting reinforcements, all positions where the connecting reinforcements contact with the arch steel frames are fixed, arch concrete is sprayed again, concrete is sprayed initially on the lower portion of the tunnel wall, wall steel frames are installed, adjacent wall steel frames are sequentially connected through inclined cross connecting reinforcements, all positions where the connecting reinforcements contact with the wall steel frames are fixed, and concrete is sprayed again. According to the construction method, a plurality of triangles are formed between the inclined cross connecting reinforcements and the steel frames, so that the steel frames are connected firmly, several partial steel frames can bear force together, instability, deformation or collapse of other steel frames caused by instability of one steel frame can be avoided, and tunnel collapse accidents due to instability of country rocks or steel frames are prevented.
Description
Technical field
The present invention relates to a kind of method for tunnel construction, specifically is the job practices of connecting reinforcement between steelframe in a kind of tunnel bolt-spary supports, belongs to the constructing tunnel field.
Background technology
In constructing tunnel, according to the difference of tunnel rock classification and excavated section, the excavation in tunnel is divided into job practicess such as full section method, up/down steps method, partial excavation method.According to the New Austrian Tunneling Method principle, bolt-spary supports is as the part in the permanent lining cutting in tunnel, and general consideration is to adopt in III level and above country rock; Combined bolting and shotcrete is as flexible support, and deflection is bigger before secondary lining is finished, and its excavation outer contour need be reserved bigger space (20cm) and reserve as distortion; Wherein bolt-spary supports must with surrounding rock body closely connected contact the as much as possible, namely guarantee supporting and country rock as a unified support system and acting in conjunction; The New Austrian Tunneling Method construction allows country rock and supporting and protection structure to produce limited distortion, reduces the stressed of liner structure with the carrying effect that allows the performance country rock.Steelframe is the part of combined bolting and shotcrete, by connecting reinforcement adjacent steelframe is linked together, and making becomes integral body between the steelframe.Bolt-spary supports is when connecting reinforcement is constructed at present, be to use being parallel to the tunnel line direction connecting reinforcement is set, make and formed a plurality of rectangles between connecting reinforcement and the steelframe, its structure is extremely unstable, be easy to take place the tunnel that invar frame unstability or wall rock destabilization cause and cave in, influence construction safety and manufacturing schedule.Also there is not better construction method to change this present situation in the present constructing tunnel.
Summary of the invention
The objective of the invention is to connect more firmly for steelframe after being implemented in the tunnel bolt-spary supports and finishing, eliminate the generation of the tunnel cave-in accident that invar frame or wall rock destabilization cause.And the job practices that a kind of tunnel bolt-spary supports steelframe connects disclosed.
Technical scheme of the present invention is as follows:
A. after top, tunnel excavation is finished, the top tunnel wall is carried out pneumatically placed concrete just;
B. after just pneumatically placed concrete is finished the arch steelframe is installed, is made the closely connected tunnel wall of all arch steelframes;
C. set lock foot anchoring stock, all arch steelframes are fixed;
D. with connecting reinforcement adjacent arch steelframe is connected successively, connecting reinforcement and arch steelframe become to tilt to intersect, thereby make connecting reinforcement form a plurality of triangles, fix in all contact positions of connecting reinforcement and arch steelframe then;
E. spray the arch concrete again;
F. after bottom, tunnel excavation is finished, the bottom tunnel wall is carried out pneumatically placed concrete just, the sealing rock face;
G., wall portion steelframe is installed in steelframe bottom, arch, is made the closely connected tunnel wall of all wall portion steelframes, set lock foot anchoring stock;
H. with connecting reinforcement adjacent wall portion steelframe is connected successively, connecting reinforcement becomes to tilt to intersect with wall portion steelframe, thereby makes connecting reinforcement form a plurality of triangles, fixes in all contact positions of connecting reinforcement and wall portion steelframe then;
I. spray wall portion concrete again.
The connecting reinforcement of the present invention intersection that tilts, make and form a plurality of triangles between connecting reinforcement and the steelframe, it is more firm to make that steelframe connects, local a few Pin steelframes can be stressed jointly, can not cause other steelframe buckling deformations because of the unstability of a Pin steelframe or collapse, thereby prevent the tunnel cave-in accident that produces because of country rock or steelframe unstability.
Description of drawings
Accompanying drawing is the side-looking structural representation behind realization the present invention.
Description of reference numerals is as follows:
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed narration:
A. after top, tunnel excavation is finished, the top tunnel wall is carried out pneumatically placed concrete just, the sealing rock face avoids rock face to expose for a long time, the rock face out-of-flatness that produces when filling up excavation;
B. by equidistant installation arch steelframe (1), make the closely connected tunnel wall of all arch steelframes (1) after just pneumatically placed concrete is finished;
C. set lock foot anchoring stock, all arch steelframes (1) are fixing;
D. use connecting reinforcement (3) that adjacent arch steelframe (1) is connected successively, connecting reinforcement (3) becomes to tilt to intersect, thereby make connecting reinforcement (3) form a plurality of triangles, weld fixing in all contact positions of connecting reinforcement (3) and arch steelframe (1) then;
E. spray the arch concrete again;
F. after bottom, tunnel excavation is finished, the bottom tunnel wall is carried out pneumatically placed concrete just, the sealing rock face;
G., wall portion's steelframe (2) is installed in arch steelframe (1) bottom, is made the closely connected tunnel wall of all wall portion steelframes (2), set lock foot anchoring stock;
H. use connecting reinforcement (3) that adjacent wall portion's steelframe (2) is connected successively, connecting reinforcement (3) becomes to tilt to intersect, thereby make connecting reinforcement (3) form a plurality of triangles, weld fixing in all contact positions of connecting reinforcement (3) and wall portion steelframe (2) then;
I. spray wall portion concrete again.
Claims (2)
1. the job practices that connects of tunnel bolt-spary supports steelframe is characterized in that it being to realize by following technical scheme:
A. after top, tunnel excavation is finished, the top tunnel wall is carried out pneumatically placed concrete just;
B. after just pneumatically placed concrete is finished arch steelframe (1) is installed, is made the closely connected tunnel wall of all arch steelframes (1);
C. set lock foot anchoring stock, all arch steelframes (1) are fixing;
D. with connecting reinforcement adjacent arch steelframe (1) is connected successively, connecting reinforcement and arch steelframe (1) become to tilt to intersect, thereby make connecting reinforcement form a plurality of triangles, fix in all contact positions of connecting reinforcement and arch steelframe (1) then;
E. spray the arch concrete again;
F. after bottom, tunnel excavation is finished, the bottom tunnel wall is carried out pneumatically placed concrete just, the sealing rock face;
G., wall portion's steelframe (2) is installed in arch steelframe (1) bottom, is made the closely connected tunnel wall of all wall portion steelframes (2), set lock foot anchoring stock;
H. with connecting reinforcement adjacent wall portion's steelframe (2) is connected successively, connecting reinforcement and wall portion steelframe (2) become to tilt to intersect, thereby make connecting reinforcement form a plurality of triangles, fix in all contact positions of connecting reinforcement and wall portion steelframe (2) then;
I. spray wall portion concrete again.
2. the job practices that connects of tunnel according to claim 1 bolt-spary supports steelframe is characterized in that:
A. after top, tunnel excavation is finished, the top tunnel wall is carried out pneumatically placed concrete just, the sealing rock face avoids rock face to expose for a long time, the rock face out-of-flatness that produces when filling up excavation;
B. by equidistant installation arch steelframe (1), make the closely connected tunnel wall of all arch steelframes (1) after just pneumatically placed concrete is finished;
D. weld fixing in all contact positions of connecting reinforcement and arch steelframe (1);
H. weld fixing in all contact positions of connecting reinforcement and wall portion steelframe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013101758661A CN103244146A (en) | 2013-05-14 | 2013-05-14 | Construction method for steel frame connection in tunnel anchor-plate retaining |
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| CN2013101758661A CN103244146A (en) | 2013-05-14 | 2013-05-14 | Construction method for steel frame connection in tunnel anchor-plate retaining |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696786A (en) * | 2013-11-14 | 2014-04-02 | 中铁隧道集团有限公司 | Arch support connecting method for enhancing longitudinal stability between steel arch supports |
| CN104196548A (en) * | 2014-07-23 | 2014-12-10 | 中国矿业大学(北京) | Combined cross support |
| CN106351674A (en) * | 2016-11-04 | 2017-01-25 | 长安大学 | Composite lock pin member of tunnel steel frame and stress analysis method of composite lock pin member |
| CN106985980A (en) * | 2017-04-27 | 2017-07-28 | 上海市政工程设计研究总院（集团）有限公司 | A kind of prospecting platform waterborne of drive power apparatus |
| CN107246275A (en) * | 2017-07-21 | 2017-10-13 | 中国神华能源股份有限公司 | For the support frame of digging laneway, supporting construction and tunnelling method |
| CN108756899A (en) * | 2018-06-11 | 2018-11-06 | 中铁二局第工程有限公司 | A kind of control of large deformation tunnel becomes excavation method |
| CN109555541A (en) * | 2018-12-10 | 2019-04-02 | 中交公局桥隧工程有限公司 | A kind of steelframe construction technology |
| CN111074781A (en) * | 2019-12-31 | 2020-04-28 | 中铁大桥局集团有限公司 | Method for quickly excavating suspension bridge tunnel anchor |
| CN111075475A (en) * | 2019-12-31 | 2020-04-28 | 浙江正方交通建设有限公司 | Weak surrounding rock tunnel supporting steel frame and construction method |
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2013
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| CN1306150A (en) * | 2000-06-11 | 2001-08-01 | 郭兰波 | Reinforcing bar netted chock and netted-shell bolting and shotcrete support |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696786A (en) * | 2013-11-14 | 2014-04-02 | 中铁隧道集团有限公司 | Arch support connecting method for enhancing longitudinal stability between steel arch supports |
| CN104196548A (en) * | 2014-07-23 | 2014-12-10 | 中国矿业大学(北京) | Combined cross support |
| CN106351674A (en) * | 2016-11-04 | 2017-01-25 | 长安大学 | Composite lock pin member of tunnel steel frame and stress analysis method of composite lock pin member |
| CN106351674B (en) * | 2016-11-04 | 2019-03-22 | 长安大学 | A kind of the composite lock foot component and its force analysis method of tunnel steelframe |
| CN106985980A (en) * | 2017-04-27 | 2017-07-28 | 上海市政工程设计研究总院（集团）有限公司 | A kind of prospecting platform waterborne of drive power apparatus |
| CN107246275A (en) * | 2017-07-21 | 2017-10-13 | 中国神华能源股份有限公司 | For the support frame of digging laneway, supporting construction and tunnelling method |
| CN108756899A (en) * | 2018-06-11 | 2018-11-06 | 中铁二局第工程有限公司 | A kind of control of large deformation tunnel becomes excavation method |
| CN109555541A (en) * | 2018-12-10 | 2019-04-02 | 中交公局桥隧工程有限公司 | A kind of steelframe construction technology |
| CN109555541B (en) * | 2018-12-10 | 2020-04-03 | 中交一公局桥隧工程有限公司 | Steel frame construction process |
| CN111074781A (en) * | 2019-12-31 | 2020-04-28 | 中铁大桥局集团有限公司 | Method for quickly excavating suspension bridge tunnel anchor |
| CN111075475A (en) * | 2019-12-31 | 2020-04-28 | 浙江正方交通建设有限公司 | Weak surrounding rock tunnel supporting steel frame and construction method |
| CN111075475B (en) * | 2019-12-31 | 2021-05-25 | 浙江正方交通建设有限公司 | Weak surrounding rock tunnel supporting steel frame and construction method |
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Application publication date: 20130814 |