CN102305077A - Rapid construction method of large-section multi-arc tunnel - Google Patents
Rapid construction method of large-section multi-arc tunnel Download PDFInfo
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- CN102305077A CN102305077A CN201110285869A CN201110285869A CN102305077A CN 102305077 A CN102305077 A CN 102305077A CN 201110285869 A CN201110285869 A CN 201110285869A CN 201110285869 A CN201110285869 A CN 201110285869A CN 102305077 A CN102305077 A CN 102305077A
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Abstract
The invention discloses a rapid construction method of a large-section multi-arc tunnel. In the method, a middle pilot tunnel is not arranged; in the tunnel construction process, the places of a main tunnel and a mid-board on one side of the multi-arc tunnel are synchronously excavated, wherein the tunnel excavation is performed by CD or CRD method; primary support and mid-board are constructed, then secondary lining of the tunnel follows; and finally, the main tunnel on the other side of the multi-arc tunnel is excavated by a step method or CD method, and corresponding support structure is built. Compared with the traditional multi-arc tunnel construction method, the construction method disclosed by the invention does not need to communicate the middle pilot tunnel and build a mid-board before excavating the main tunnels on the two sides, thereby greatly increasing the construction speed of multi-arc tunnel, shortening the construction time and properly reducing the engineering cost.
Description
Technical field
The present invention relates to a kind of job practices of tunnel, be specifically related to a kind of rapid constructing method of big section multiple-arch tunnel.
Background technology
Multiple-arch tunnel has openings position and selects degree of freedom big, the lead-in wire floor space is little, be convenient to the bridge tunnel continuous, handsome in appearance, be convenient to plurality of advantages such as operation management, the multiple-arch tunnel structure is widely used in the engineering practice in recent years.Its main construction method has:
(1) the pilot tunnel excavation method of going ahead of the rest in
[1,2]This method is the middle pilot tunnel excavation perforation earlier with position, multiple-arch tunnel mid-board place; Then therefrom mid-board is built to hole, two ends, tunnel in the pilot tunnel middle part; After treating that mid-board can carry, carry out the excavation in positive hole, multiple-arch tunnel both sides again and carry out the work of executing of corresponding supporting and protection structure.This method can guarantee the construction safety in tunnel, but because excavation branch is many, speed of application is slower.Most at present multiple-arch tunnels all is to adopt this method to construct.
(2) mid-board job-hopping excavation method
[3]This method is the first positive hole of a side of excavation multiple-arch tunnel, executes and does preliminary bracing, and the country rock at the tunneling mid-board position of then job-hoping is also built mid-board, excavates the positive hole of opposite side at last and executes and make corresponding supporting and protection structure.This method has reduced working procedure, has accelerated construction speed.But arch, tunnel supporting and protection structure was in vacant state when mid-board position country rock excavated in this method construction; Very easily cause whole sinking of structure generation of arch, tunnel even whole tunnel to cave in; There is bigger construction safety hidden danger, can only could using under the wall rock condition preferably; And adopt the vertical constuction joint of this method more, also influenced the quality and the durability of tunnel structure.Only there are indivedual multiple-arch tunnels to adopt this method to construct at present both at home and abroad.
(3) no pilot tunnel method
[4,5]This method is that full section or benching tunnelling method excavation is adopted at position, the positive hole of multiple-arch tunnel one side and mid-board place synchronously, executes and does preliminary bracing, then excavates the positive hole of opposite side and executes and make corresponding supporting and protection structure.This method has reduced working procedure, has accelerated construction speed greatly.But in this method construction full section or benching tunnelling method excavation are adopted as a cavern in positive hole of a side and position, mid-board place; This cavern span is big; Risk is high in the construction; Cause the landslide in tunnel easily; There is very big potential safety hazard, therefore generally only could uses when perhaps the positive hole of multiple-arch tunnel span is very little down at wall rock condition preferably.Also only there are several multiple-arch tunnels of only a few to adopt this method to construct at present both at home and abroad.
On the whole; At present in the Multi-arch Tunnel Construction; Pilot tunnel excavation perforation earlier in also main the employing; Build mid-board again, then excavate the job practices in positive hole, its excavation piecemeal is many; Speed of application is slow; Had a strong impact on the construction speed of multiple-arch tunnel, can't satisfy the requirement of multiple-arch tunnel rapid construction, caused present multiple-arch tunnel generally to be only applicable to the short tunnel of length less than 500m.
List of references
[1] Tang Liang. Double Multi-Arch Tunnel Construction method [J]. Traffic Institutes Of Chongqing's journal, 2004,23 (2): 31-35.
[2] Wang Hansheng. soft rock shallow embedding section Double Multi-Arch highway tunnel construction technology [J]. railway type design, 2004, (8): 41-43.
[3] Li Leyang, the section grandson its, Wang Qiu comes. the instance [J] of single hole method construction multiple-arch tunnel. construction technology, 2008, (11): 107-111.
[4] Shu Lei. no pilot tunnel method construction multiple-arch tunnel technology [J]. railway type design, 2008, (6): 76-79.
[5] Liu Sheng, Li Ningjun, Liu Hongping. based on the multiple-arch tunnel structure design and the Construction Study [J] of no pilot tunnel method. water conservancy and construction work journal, 2010,8 (4): 107-110.
Summary of the invention
Technical problem to be solved by this invention provide a kind of can guarantee construction safety, again can accelerating construction progress and reduce the rapid constructing method of the big section multiple-arch tunnel of construction costs.
In order to solve the problems of the technologies described above; The rapid constructing method of big section multiple-arch tunnel provided by the invention; Middle pilot tunnel is not set; The positive hole of one side of multiple-arch tunnel mid-board position, place and multiple-arch tunnel is excavated synchronously; Then excavate the positive hole of opposite side; Multiple-arch tunnel adopts mid-board method (CD method) or intersection mid-board method (CRD method) elder generation excavation to comprise the side cavern at positive hole of multiple-arch tunnel one side and position, mid-board place; Execute the preliminary bracing of doing this cavern immediately, then execute secondary lining and the mid-board of doing this positive hole; The positive hole of the opposite side of multiple-arch tunnel adopts benching tunnelling method or mid-board method (CD method) to excavate, and executes the preliminary bracing of doing this positive hole immediately, and then executes the secondary lining of doing this positive hole again.
The mid-board of described multiple-arch tunnel is executed work, one-time cast-forming simultaneously with the secondary lining that excavates the positive hole of side earlier.
In the process of the big section multiple-arch tunnel rapid constructing method of research and development; Carried out deep theoretical analysis and calculation; The key influence factor and pass key control operation of job practices of the present invention have been confirmed on this basis; Therefore; The present invention has sufficient theory analysis research basis and foundation, can guarantee the construction safety and the accelerating construction progress in tunnel better.
Adopt the rapid constructing method of the big section multiple-arch tunnel of technique scheme, compare with existing Multi-arch Tunnel Construction method, its advantage is:
(1) need not connect in the construction in advance in pilot tunnel and execute and make mid-board, mid-board can progressively be executed work with the excavation in the positive hole of a side, has accelerated the construction speed of multiple-arch tunnel greatly, has shortened the construction period in multiple-arch tunnel tunnel;
(2) reduced excavation branch and working procedure in the Multi-arch Tunnel Construction process, the corresponding disturbance that has reduced the tunnel perimeter country rock simultaneously, has been shortened the closed time of whole tunnel support structure, has guaranteed the construction safety in tunnel;
(3) reduce engineering quantity and the excavation at middle pilot tunnel top and the engineering quantity of backfill of pilot tunnel temporary lining in the part in the construction, reduced the construction costs of multiple-arch tunnel to a certain extent.
(4) tunnel mid-board and the positive hole of side secondary lining integral body are executed work, have reduced constuction joint, are beneficial to the assurance construction quality.
(5) owing to the reduction of duration and cost, job practices of the present invention can be expanded the range of application of multiple-arch tunnel greatly, and the above medium tunnel of 500m also can adopt the multiple-arch tunnel structural shape.
Description of drawings
Fig. 1 is the concrete working procedure sketch map of the embodiment of the invention
Among the figure: the excavation of topping bar on the left of the positive hole, an I-left side; Left side, positive hole, the II-left side excavation of getting out of a predicament or an embarrassing situation; Zheng Dong right side, the III-left side excavation of topping bar; Zheng Dong right side, the IV-left side excavation of getting out of a predicament or an embarrassing situation; The right Zheng Dong of the V-excavation of topping bar on the right side; The right Zheng Dong of the VI-excavation of getting out of a predicament or an embarrassing situation on the right side; Left side, the right positive hole of the VII-excavation of topping bar; Left side, the right positive hole of the VIII-excavation of getting out of a predicament or an embarrassing situation; The A-preliminary bracing; The B-secondary lining; The C-interim mid-board of constructing; The permanent mid-board of D-multiple-arch tunnel; Zheng Dong arch, 1-left side advance support; Left side, positive hole, a 2-left side top bar preliminary bracing and temporary lining; Left side, positive hole, a 3-left side get out of a predicament or an embarrassing situation preliminary bracing and temporary lining; The preliminary bracing of topping bar of Zheng Dong right side, a 4-left side; The preliminary bracing of getting out of a predicament or an embarrassing situation of Zheng Dong right side, a 5-left side, the positive hole temporary lining of a 6-left side is removed, positive hole, a 7-left side and mid-board secondary lining; Arch, the right Zheng Dong arch of 8-advance support; The right Zheng Dong of 9-top bar on the right side preliminary bracing and temporary lining, the right Zheng Dong of 10-get out of a predicament or an embarrassing situation on the right side preliminary bracing and temporary lining, the preliminary bracing of topping bar of left side, the right positive hole of 11-; The right positive hole temporary lining of 12-is removed, the right positive hole of 13-secondary lining.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Referring to Fig. 1, the rapid constructing method of big section multiple-arch tunnel provided by the invention, its concrete working procedure is following:
(1) adopting method such as leading grouting with small pipe to carry out left Zheng Dong arch pays in advance and protects 1;
(2) carry out left side, positive hole, a left side top bar (I portion) bore to pop and dig;
(3) execute and do left side, positive hole, a left side top bar spray anchor preliminary bracing (the steel bow member is installed, is hung steel mesh reinforcement, skyhook, sprayed mortar) and mid-board temporary lining 2 (the steel bow member is installed, is hung steel mesh reinforcement, sprayed mortar);
(4) carry out left side, positive hole, a left side get out of a predicament or an embarrassing situation (II portion) bore to pop and dig;
(5) execute and do left side, positive hole, a left side get out of a predicament or an embarrassing situation spray anchor preliminary bracing (the steel bow member is installed, is hung steel mesh reinforcement, skyhook, sprayed mortar) and mid-board temporary lining 3 (the steel bow member is installed, is hung steel mesh reinforcement, sprayed mortar);
(6) carry out left Zheng Dong right side top bar (III portion) bore to pop and dig;
(7) execute and do the spray anchor preliminary bracing 4 (the steel bow member is installed, is hung steel mesh reinforcement, skyhook, sprayed mortar) of topping bar of left Zheng Dong right side;
(8) carry out left Zheng Dong right side get out of a predicament or an embarrassing situation (IV portion) bore to pop and dig;
(9) execute and do the spray anchor preliminary bracing 5 (the steel bow member is installed, is hung steel mesh reinforcement, skyhook, sprayed mortar) of getting out of a predicament or an embarrassing situation of left Zheng Dong right side;
(10) remove the positive hole temporary lining 6 in a left side;
(11) lay splash guard, positive hole secondary lining in a cast left side and steel concrete mid-board, positive hole secondary lining in a left side and tunnel mid-board one-time cast-forming 7;
(12) adopting method such as leading grouting with small pipe to carry out right Zheng Dong arch pays in advance and protects 8;
(13) carry out right Zheng Dong right side top bar (V portion) bore to pop and dig;
(14) execute and do right Zheng Dong right side top bar spray anchor preliminary bracing (the steel bow member is installed, is hung steel mesh reinforcement, skyhook, sprayed mortar) and mid-board temporary lining 9 (the steel bow member is installed, is hung steel mesh reinforcement, sprayed mortar);
(15) carry out right Zheng Dong right side get out of a predicament or an embarrassing situation (VI portion) bore to pop and dig;
(16) execute and do right Zheng Dong right side get out of a predicament or an embarrassing situation spray anchor preliminary bracing (the steel bow member is installed, is hung steel mesh reinforcement, skyhook, sprayed mortar) and mid-board temporary lining 10 (the steel bow member is installed, is hung steel mesh reinforcement, sprayed mortar);
(17) carry out left side, positive hole, the right side top bar (VII portion) bore to pop and dig;
(18) execute and do the spray anchor preliminary bracing 11 (the steel bow member is installed, is hung steel mesh reinforcement, skyhook, sprayed mortar) of topping bar of left side, right positive hole;
(19) carry out left side, positive hole, the right side get out of a predicament or an embarrassing situation (VIII portion) bore to pop and dig;
(20) remove right positive hole temporary lining 12;
(21) lay splash guard, the right positive hole of cast secondary lining 13.
Claims (2)
1. the rapid constructing method of a big section multiple-arch tunnel; The positive hole of one side of multiple-arch tunnel mid-board position, place and multiple-arch tunnel is excavated synchronously; Then excavate the positive hole of opposite side; It is characterized in that: multiple-arch tunnel adopts mid-board method or intersection mid-board method to excavate the side cavern that comprises positive hole of multiple-arch tunnel one side and position, mid-board place earlier; Execute the preliminary bracing of doing this cavern immediately, then execute secondary lining and the mid-board of doing this positive hole; The positive hole of the opposite side of multiple-arch tunnel adopts benching tunnelling method or mid-board method to excavate, and executes the preliminary bracing of doing this positive hole immediately, and then executes the secondary lining of doing this positive hole again.
2. the rapid constructing method of big section multiple-arch tunnel according to claim 1 is characterized in that: the mid-board of described multiple-arch tunnel is executed work, one-time cast-forming simultaneously with the secondary lining that excavates the positive hole of side earlier.
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| CN102704939A (en) * | 2012-06-26 | 2012-10-03 | 中国建筑第五工程局有限公司 | Combined steel temporary supporting excavation method for tunnel with extra-large section |
| CN103195455A (en) * | 2013-03-11 | 2013-07-10 | 中铁二院工程集团有限责任公司 | Large section tunnel construction support and protection system and construction method under flabby geological environment |
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| CN103670423A (en) * | 2013-11-14 | 2014-03-26 | 中铁隧道集团有限公司 | Method for excavating tunnel in layered phyllite body |
| CN103670427A (en) * | 2013-12-24 | 2014-03-26 | 中铁十九局集团第三工程有限公司 | Cross excavation support late-dismantling type tunnel construction method |
| CN103758530A (en) * | 2014-01-22 | 2014-04-30 | 北京市市政工程设计研究总院有限公司 | Primary support multiple-arch dual-liner independent underground excavation subway interval structure and construction method |
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Application publication date: 20120104 |