CN103867214A - Construction method for carrying out secondary lining and casting in shielded tunnel - Google Patents
Construction method for carrying out secondary lining and casting in shielded tunnel Download PDFInfo
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- CN103867214A CN103867214A CN201310588520.4A CN201310588520A CN103867214A CN 103867214 A CN103867214 A CN 103867214A CN 201310588520 A CN201310588520 A CN 201310588520A CN 103867214 A CN103867214 A CN 103867214A
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Abstract
The invention relates to a construction method for carrying out secondary lining and casting in a shielded tunnel. The construction method comprises the following steps: (1) mounting a 6m full-circle needle beam type mould board trolley; (2) scabbling segments; (3) binding steel bars; (4) slipping and positioning mould boards; (5) casting concrete; (6) carrying out deformation joint construction; (7) processing a construction joint; (8) mounting a 12m full-circle needle beam type mould board trolley; (9) carrying out crossed construction on the two trolleys. According to the construction method disclosed by the invention, the technical problems of joint staggering, pulp leakage, more construction cold joints, poor surface evenness of concrete, inconsistent color, water seepage and the like existing in secondary lining construction are solved; the construction difficulty that two mould board trolleys simultaneously operate in a single-track tunnel with one end being plugged is overcome, thus not only is the structural strength of the tunnel improved, but also the service life period is prolonged and the waterproof property and the construction efficiency are improved.
Description
Technical field
The present invention relates to a kind ofly in complete shield tunnel, carry out the construction method that secondary lining is built.
Background technology
Along with the development of shield method technology, the application of shield tunnel is more and more extensive, develops into subway tunnel, cable tunnel, taking and discharging tunnel etc. from highway tunnel, railway tunnel the earliest.According to the diversification application in tunnel, structural strength, service life and waterproof ability etc. to tunnel have also had higher requirement, conventional once lining is smeared hole and leaking-stopping measure and can not meet the use needs in the tunnel to having specific use in conjunction with filleting, therefore need established tunnel to build interior secondary lining to meet the Special use requirement in tunnel.
For many years, the secondary lining of domestic construction mostly have that seam faulting of slab ends, spillage, the cold seam of construction are many, the construction problem such as concrete surface poor flatness, color are inconsistent, percolating water.Trace it to its cause, early stage Second Lining Construction adopts the simple and easy lining cutting die apparatus of designed, designed to construct (for example easy-to-dismount i iron lining cutting bow member) more, has problems because process technology limit causes Second Lining Construction.Through builders' continuous effort, nineteen fifty-three, China is used formwork jumbo to carry out Tunnel Second Lining Construction first, complete the once leap from manual lining cutting to mechanical work in China's tunnel construction history, nineteen eighty-two, China introduced the Dayaoshan Tunnel lining construction of formwork jumbo for weighing wide multiple line from Japan first, and within 1985, Guangdong has completed manufacturing and designing of China's First formwork jumbo.Within 1988, this technique first Application is crossed in the shield tunnel project of river at south, city cable, and has obtained success.The continuous progress of technique has also risen to a new height by Second Lining Construction in security control, quality assurance and aspect saving the duration.
Construct that the tunnel of secondary lining has that structural strength is high, service life is long and the advantage such as waterproof ability is strong.There is the advantages such as workmanship is high, reliable in structure, easy to operate, speed of perfusion fast, tunnel forming surface is good, be widely used in the construction in domestic each tunnel at present and use formwork jumbo to carry out Second Lining Construction.But be widely used at present the formwork jumbo of Tunnel Second Lining concreting, because consider programming, mostly be designed to there is the formwork jumbo compared with big-length, in order to ensure the concrete impression quality of building rear secondary lining, be generally designed to whole section of inflexible straight line rigid body simultaneously.If directly current formwork jumbo is used for to especially sharp radius curve section Second Lining Construction of curved section, along with the extension of die length, deviation between mold center's axis and tunnel central axis is increasing, therefore will cause mass defects such as building linear, the local secondary lining cutting inner headroom reduced not straight with design secondary lining seam inconsistent, that segmentation is built of the former tunnel axis of rear secondary lining axis runout, curved section secondary lining.Simultaneously secondary lining is built the original lining cutting in Shi You tunnel, space and mould seals the complete enclosure space forming due to concrete, and the transport of existing concrete, enter mould and water that to smash construction technology be for the concreting exploitation of open space substantially, carry out concreting at this enclosure space of secondary lining, because of the restriction of Vibration Technology, water and smash later stage space and dwindle and cause concrete to enter the impact without factors such as exhaust passages of mould difficulty and concrete, the concrete compactness of the secondary lining especially compactness of top concrete is difficult to ensure, often cause the secondary lining of tunnel top to occur the even mass defect such as cavity of voids and pits.How to make good use of secondary lining and build equipment, reasonable arrangement procedure connection, developing a set of secondary lining casting method is the key that ensures workmanship.
Summary of the invention
The present invention will provide a kind of to carry out the construction method that secondary lining is built in complete shield tunnel, the construction problems such as many, the concrete surface poor flatness of the cold seam of seam faulting of slab ends, spillage, construction, color that Second Lining Construction exists are inconsistent for solving, percolating water, to improve structural strength, service life and the waterproof ability in tunnel.Another for ensureing that programming can meet owner's requirement, develop two construction technologies that formwork jumbo is constructed simultaneously of the interior use of single-track tunnel of a set of at one end shutoff, when ensureing construction quality, improve efficiency of construction.
For achieving the above object, the construction method that the present invention adopts is: a kind ofly in complete shield tunnel, carry out the construction method that secondary lining is built, it is characterized in that, Specific construction step is as follows:
1. 6m whole-circle needle beam type formwork jumbo is installed
Be arranged on and in tunnel, specify construction location removing 6m whole-circle needle beam type formwork jumbo after rust staining;
2. section of jurisdiction dabbing
Cleaning tunnel duct piece before construction, and the section of jurisdiction that is C55 by strength grade of concrete makes the artificial matsurface of the concavo-convex 4mm of being not less than;
3. reinforcing bar binding
On established artificial matsurface, carry out reinforcing bar binding construction;
4. template slippage, location
6m whole-circle needle beam type formwork jumbo is slid onto on the reinforcing bar that colligation completes by running gear, according to measuring setting-out, chassis is accurately located, ensure that lining thickness meets design requirement, located rear installation both sides head plate;
5. concreting
By vertical transport and horizontal trasportation equipment by concrete conveyance to the fixed pump place in tunnel, concrete pump is delivered in template and according to the height of template inner concrete face and adjusted and build window in time, when building, guarantee that by use wall-attachment electromagnetic shaker and internal vibration rod concrete vibrating meets the demands;
6. deformation joint construction
Every 24m construction Deformation seam, the material of deformation joint is polyethylene barrier film, high modulus polyurethane fluid sealant, low density polyethylene (LDPE) lining plank;
7. the processing of constuction joint
For ensureing the combination of New-old concrete, ensure the continuity of concrete structure, dabbing processing need be carried out in every mould concrete joint;
8.12m whole-circle needle beam type formwork jumbo is installed
12m whole-circle needle beam type formwork jumbo is being installed apart from 6m whole-circle needle beam type formwork jumbo 150m place;
9. two chassis crossed constructions
Complete at 6m whole-circle needle beam type formwork jumbo slippage, location, Feng Mo, the concreting of in the curing time after building, carrying out 12m whole-circle needle beam type formwork jumbo, after having constructed, carry out again the demoulding, slippage, location, envelope mould and the concreting of 6m whole-circle needle beam type formwork jumbo.
When two chassis crossed constructions, because the concreting time of 12m whole-circle needle beam type formwork jumbo is longer, for the distance of controlling well between 2 chassis, guarantee that two chassis are all in effective fed distance of fixed pump, after every construction 3 moulds of 12m whole-circle needle beam type formwork jumbo are 36m, it is that 12m constructs in 6m chassis that 12m whole-circle needle beam type formwork jumbo need reserve 1 mould.
The invention has the beneficial effects as follows:
The invention provides a kind of whole-circle needle beam type formwork jumbo that uses and carry out the construction method that secondary lining is built in complete shield tunnel, the construction problems such as many, the concrete surface poor flatness of the cold seam of seam faulting of slab ends, spillage, construction, color that Second Lining Construction exists are inconsistent for solving, percolating water, to improve structural strength, service life and the waterproof ability in tunnel.Two construction technologies that formwork jumbo is constructed simultaneously of the interior use of single-track tunnel of developing a set of at one end shutoff, improve efficiency of construction when ensureing construction quality.
Brief description of the drawings
Fig. 1 is Second Lining Construction flow chart of the present invention;
Fig. 2 is two chassis crossed construction schematic diagrames.
Detailed description of the invention
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
The present invention is in Up for Qinshan Nuclear Power Plant expansion project (Fan family mountain nuclear power engineering) outlet tunnel and floss hole (CH, CG) engineering construction, and this project need be carried out Second Lining Construction in the shield tunnel of having constructed, the concrete step (shown in Fig. 1) of executing:
(1) 6m whole-circle needle beam type formwork jumbo is installed
Chassis adopts polishing machine thoroughly to polish after checking and accepting the scene of being transported in factory, removes rust staining, and in tunnel, assigned address is installed subsequently.
(2) section of jurisdiction dabbing
Before construction, tunnel duct piece is cleaned out and by manually coordinating section of jurisdiction that mini-plant is C55 by strength grade of concrete to make the artificial matsurface of the concavo-convex 4mm of being not less than.
(3) reinforcing bar binding
On established artificial matsurface, carry out reinforcing bar binding construction.Before construction, reinforcing bar is managed as a whole, shifted to an earlier date blanking, store classifiedly by kind, specification.Longitudinal rib and outer shroud muscle that lining processing uses are Ф 16, and interior ring muscle is that Ф 20(is except curved section), in curved section, ring muscle is Ф 22, and dowel is Ф 12, and reinforcing bar is HRB335 level steel.Main tendon protective layer, inner and outer rings muscle is 30mm.
(4) template slippage, location
Whole-circle needle beam type formwork jumbo is slid onto on the reinforcing bar that colligation completes by running gear, according to measuring setting-out, chassis is accurately located, ensure that lining thickness meets design requirement, located rear installation both sides head plate.
(5) concreting
By vertical transport and horizontal trasportation equipment by concrete conveyance to the fixed pump place in tunnel, concrete pump is delivered in template and according to the height of template inner concrete face and is adjusted and build window in time.
(6) deformation joint construction
Need construction Deformation seam every 24m, the main material of deformation joint is polyethylene barrier film, high modulus polyurethane fluid sealant, low density polyethylene (LDPE) lining plank.
(7) processing of constuction joint
For ensureing the combination of New-old concrete, ensure the continuity of concrete structure, dabbing processing need be carried out in every mould concrete joint.
(8) 12m whole-circle needle beam type formwork jumbo is installed
12m whole-circle needle beam type formwork jumbo is being installed apart from 6m whole-circle needle beam type formwork jumbo 150m place.
(9) two chassis crossed constructions
As shown in Figure 2, in the curing time completing after building at 6m whole-circle needle beam type formwork jumbo 1, carry out slippage, location, Feng Mo, the concreting of 12m whole-circle needle beam type formwork jumbo 2, after having constructed, carry out again the demoulding, slippage, location, envelope mould and the concreting of 6m whole-circle needle beam type formwork jumbo 1.Because the concreting time of 12m whole-circle needle beam type formwork jumbo 2 is longer, for the distance of controlling well between 2 chassis, guarantee that two chassis are all in effective fed distance of fixed pump, after every construction 3 moulds of 12m whole-circle needle beam type formwork jumbo 2 are 36m, it is that 12m constructs in 6m chassis 1 that 12m whole-circle needle beam type formwork jumbo 2 need reserve 1 mould, so circulation.
Claims (2)
1. in complete shield tunnel, carry out the construction method that secondary lining is built, it is characterized in that, Specific construction step is as follows:
6m whole-circle needle beam type formwork jumbo is installed
Be arranged on and in tunnel, specify construction location removing 6m whole-circle needle beam type formwork jumbo after rust staining;
Section of jurisdiction dabbing
Cleaning tunnel duct piece before construction, and the section of jurisdiction that is C55 by strength grade of concrete makes the artificial matsurface of the concavo-convex 4mm of being not less than;
Reinforcing bar binding
On established artificial matsurface, carry out reinforcing bar binding construction;
Template slippage, location
6m whole-circle needle beam type formwork jumbo is slid onto on the reinforcing bar that colligation completes by running gear, according to measuring setting-out, chassis is accurately located, ensure that lining thickness meets design requirement, located rear installation both sides head plate;
Concreting
By vertical transport and horizontal trasportation equipment by concrete conveyance to the fixed pump place in tunnel, concrete pump is delivered in template and according to the height of template inner concrete face and adjusted and build window in time, when building, guarantee that by use wall-attachment electromagnetic shaker and internal vibration rod concrete vibrating meets the demands;
Deformation joint construction
Every 24m construction Deformation seam, the material of deformation joint is polyethylene barrier film, high modulus polyurethane fluid sealant, low density polyethylene (LDPE) lining plank;
The processing of constuction joint
For ensureing the combination of New-old concrete, ensure the continuity of concrete structure, dabbing processing need be carried out in every mould concrete joint;
12m whole-circle needle beam type formwork jumbo is installed
12m whole-circle needle beam type formwork jumbo is being installed apart from 6m whole-circle needle beam type formwork jumbo 150m place;
Two chassis crossed constructions
Complete and in the curing time after building, carry out 12m whole-circle needle beam type formwork jumbo at 6m whole-circle needle beam type formwork jumbo
Slippage, location, Feng Mo, concreting, after having constructed, carry out again 6m whole-circle needle beam type formwork jumbo
The demoulding, slippage, location, envelope mould and concreting.
2. according to claim 1ly in complete shield tunnel, carry out the construction method that secondary lining is built, it is characterized in that: when described two chassis crossed constructions, because the concreting time of 12m whole-circle needle beam type formwork jumbo is longer, for the distance of controlling well between 2 chassis, guarantee that two chassis are all in effective fed distance of fixed pump, after every construction 3 moulds of 12m whole-circle needle beam type formwork jumbo are 36m, it is that 12m constructs in 6m chassis that 12m whole-circle needle beam type formwork jumbo need reserve 1 mould.
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| CN201310588520.4A CN103867214A (en) | 2013-11-21 | 2013-11-21 | Construction method for carrying out secondary lining and casting in shielded tunnel |
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| CN201310588520.4A CN103867214A (en) | 2013-11-21 | 2013-11-21 | Construction method for carrying out secondary lining and casting in shielded tunnel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781578A (en) * | 2016-03-08 | 2016-07-20 | 中铁隧道集团三处有限公司 | Rapid blocking formwork trolley and blocking method for water and mud burst of tunnel |
| CN105927249A (en) * | 2016-05-24 | 2016-09-07 | 北京住总集团有限责任公司 | Construction method for pouring tunnel second lining self-compacting concrete |
| CN106321116B (en) * | 2015-06-15 | 2018-06-15 | 中国葛洲坝集团国际工程有限公司 | A kind of tunnel is dug and the construction method of lining concrete parallel operations |
| CN109826649A (en) * | 2019-01-11 | 2019-05-31 | 中铁十一局集团第四工程有限公司 | Tunnel double-lining concrete casting system construction method |
| CN111577322A (en) * | 2020-07-02 | 2020-08-25 | 中铁工程装备集团有限公司 | Synchronous lining joist device and construction method thereof |
| CN113898383A (en) * | 2021-10-09 | 2022-01-07 | 中铁二十三局集团第四工程有限公司 | Secondary lining pouring method with rubber waterstop |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321116B (en) * | 2015-06-15 | 2018-06-15 | 中国葛洲坝集团国际工程有限公司 | A kind of tunnel is dug and the construction method of lining concrete parallel operations |
| CN105781578A (en) * | 2016-03-08 | 2016-07-20 | 中铁隧道集团三处有限公司 | Rapid blocking formwork trolley and blocking method for water and mud burst of tunnel |
| CN105781578B (en) * | 2016-03-08 | 2018-02-06 | 中铁隧道集团三处有限公司 | The quick blocking formwork jumbo and method for blocking of a kind of tunnel water bursting factor |
| CN105927249A (en) * | 2016-05-24 | 2016-09-07 | 北京住总集团有限责任公司 | Construction method for pouring tunnel second lining self-compacting concrete |
| CN109826649A (en) * | 2019-01-11 | 2019-05-31 | 中铁十一局集团第四工程有限公司 | Tunnel double-lining concrete casting system construction method |
| CN109826649B (en) * | 2019-01-11 | 2020-05-19 | 中铁十一局集团第四工程有限公司 | Construction method of tunnel secondary lining concrete pouring system |
| CN111577322A (en) * | 2020-07-02 | 2020-08-25 | 中铁工程装备集团有限公司 | Synchronous lining joist device and construction method thereof |
| CN111577322B (en) * | 2020-07-02 | 2022-01-21 | 中铁工程装备集团有限公司 | Synchronous lining joist device and construction method thereof |
| CN113898383A (en) * | 2021-10-09 | 2022-01-07 | 中铁二十三局集团第四工程有限公司 | Secondary lining pouring method with rubber waterstop |
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Application publication date: 20140618 |
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