CN201363154Y - Mobile trestle bridge - Google Patents

Mobile trestle bridge Download PDF

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Publication number
CN201363154Y
CN201363154Y CNU2009200227397U CN200920022739U CN201363154Y CN 201363154 Y CN201363154 Y CN 201363154Y CN U2009200227397 U CNU2009200227397 U CN U2009200227397U CN 200920022739 U CN200920022739 U CN 200920022739U CN 201363154 Y CN201363154 Y CN 201363154Y
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CN
China
Prior art keywords
bridge
trestle
wheel
construction
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNU2009200227397U
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Chinese (zh)
Inventor
杨忠
林茂
杨愚
彭卫平
马先科
郑朋鹏
王道明
毛宇飞
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Sinohydro Bureau 7 Co Ltd
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Sinohydro Bureau 7 Co Ltd
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Priority to CNU2009200227397U priority Critical patent/CN201363154Y/en
Application granted granted Critical
Publication of CN201363154Y publication Critical patent/CN201363154Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a tunnel construction device, particularly discloses a mobile trestle bridge. The mobile trestle bridge comprises a main bridge; and both approach bridges and supports are arranged in front of and behind the main bridge. The mobile trestle bridge is characterized in that the mobile trestle bridge further comprises a hydraulic system and an electrical system; walking devices are arranged at the front end and the back end of the main bridge; and the main bridge comprises a deformable Bailey truss, a bridge face plate and a support frame for the bridge face plate. The mobile trestle bridge has the beneficial effects that the research and development of the movable trestle bridge ensure that dug slag in a pit can be smoothly shipped out and the normal construction operation of an inverted arch concrete lining can be conducted; the efficacy is greatly improved; and the construction period is shortened. Further, the mobile trestle bridge not only meets requirements on construction period, but also meets requirements on civilized construction.

Description

A kind of movable trestle
(1) technical field
The utility model relates to a kind of constructing tunnel equipment, particularly a kind of movable trestle.
(2) background technology
China's arterial railway main line ability is very nervous at present, can't satisfy the demand of passenger and freight transportation, is badly in need of building special Line for Passenger Transportation, satisfies economically developed urban compact group's intercity the demand that passenger transport is growing; In addition for a long time, China railways net layout is presenting unreasonable situation always, and particularly in vast west area, the fortune net is sparse, and the capacity wretched insufficiency is with the contact ability at middle part, east.Therefore, to separate lines for passenger and freight in order satisfying, and to improve state-owned railroads net layout, satisfy the needs of communications and transportation, country carries out railway construction energetically in recent years.Newly-built Beijing-Shanghai High-Speed Railway is the north-south main framing of " four vertical four horizontal strokes " Line for Passenger Transportation in " national medium-term and long-term railway network planning ", is that our article one has world-class high-speed railway.Constructing tunnel is as the important content of railway civil engineering, and its construction technology plays a decisive role to construction quality and construction period.In the present similar construction operation, majority is simple and easy trestle or the springboard of temporarily setting up, and function singleness, relatively poor, the poor stability of adaptive capacity are installed spelling, turnover use inconvenience, mechanization degree is low in the practice of construction operation process, and safety assurance and civilized construction level are low.
(3) summary of the invention
The utility model provides a kind of movable trestle of highly effective in order to remedy the deficiencies in the prior art.
The utility model is achieved by the following technical solution:
A kind of movable trestle, comprise main bridge, be arranged on the access bridge of main bridge front and back, the preceding support that is arranged on main bridge rear and front end and back support, it is characterized in that: this movable trestle also comprises hydraulic system and electrical system, the rear and front end of main bridge is equipped with running gear, main bridge comprises the distortion Bailey truss, bridge deck and bridge deck bracing frame.
The more excellent technical scheme of the utility model is: the modification Bailey truss comprise wind up, lower edge, tiltedly string, string and junction plate thereof hang down; Bridge deck comprise panel, vertical steel sleeper, horizontal steel sleeper, and the bridge deck support comprises three crossbeams and fastener thereof etc.Bolt Connection is adopted on standard truss top, and the bottom is hinged; The forward and backward wheel type traveling mechanism that is, front-wheel are steel wheel, and walking is on tunnel preliminary bracing face, and trailing wheel is a steel core encapsulate wheel, and walking is being built on the moulding inverted arch concrete, and hydraulic system mainly is made up of hydraulic oil container, oil circuit and hydraulic jack.Hydraulic oil container is arranged in the trestle afterbody, and oil circuit is arranged fixing along the trestle truss, and the hydraulic jack cylinder body is fixed on the truss, and piston rod and running gear are hinged.By stretching of hydraulic jack, realize the lifting action of trestle, satisfy the conversion of trestle duty and walking states and adjust the scope of operation difference in height problem that in-cavity construction exists that solves; The trestle electrical system mainly is made up of warning lamp, Oil pump electrical machinery, walking locator.
The beneficial effects of the utility model are: removable trestle both can make the slag charge of excavation in the hole transport smoothly, can guarantee the concrete-lined normal construction operation of inverted arch again.Thereby constitute the uninterrupted continuously construction on a construction line of excavation operation and inverted arch concrete lining operation, improved operating efficiency greatly, shorten construction period.Not only guarantee construction period, also satisfied the needs of civilized construction and safety guarantee.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing 1 is a structural representation of the present utility model;
Accompanying drawing 2 is the cross-sectional view of main bridge of the present utility model;
Accompanying drawing 3 is the structural representation of back of the present utility model support and trailing wheel;
Accompanying drawing 4 is an electrical system composition diagram of the present utility model.
Among the figure, 1 access bridge, 2 preceding supports, 3 front-wheels, 4 main bridges, 5 hydraulic oil containers, 6 trailing wheels, 7 backs are supported, 8 distortion Bailey truss, 9 bridge deck, 10 bridge deck bracing frames.
(5) specific embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprises that access bridge 1, preceding support 2 are all established in the front and back of main bridge 4, main bridge 4, the back supports 7, also comprise hydraulic system and electrical system, the rear and front end of main bridge 4 is equipped with running gear, main bridge 4 is distortion Bailey truss 8 structures, adopt the 9m standard knot to make, the connection form of standard truss is that Bolt Connection is adopted on top, is hinged below; Described bridge deck 9 comprise panel, vertical steel sleeper, horizontal steel sleeper; Bridge deck bracing frame 10 comprises crossbeam and fastener thereof.Bolt Connection is adopted on distortion Bailey truss 8 tops, and the bottom is hinged.Before and after main bridge access bridge is set all, it is current to be convenient to automobile and other construction equipments; The forward and backward steel buttress that is provided with of trestle in order to bear the trestle service load, guarantees trestle stability; Arrange the trestle running gear according to the design span, the forward and backward wheel type traveling mechanism that is, front-wheel 3 is a steel wheel, and walking is on tunnel preliminary bracing face, and trailing wheel 6 is a steel core encapsulate wheel, and walking is being built on the moulding inverted arch concrete.By adopting the towing of in-cavity construction machinery, realize that trestle moves the transition requirement.In addition, running gear also possesses the independent steering function, can realize that turning and deflection action are to satisfy relevant construction requirement; Hydraulic system mainly is made up of hydraulic oil container 5, oil circuit and hydraulic jack.Hydraulic oil container 5 is arranged in the trestle afterbody, avoids in the hole in the excavation bursting work process rock ballast to hit and damages, and oil circuit is arranged fixing along the trestle truss, and the hydraulic jack cylinder body is fixed on the truss, and piston rod and running gear are hinged.By stretching of hydraulic jack, realize the lifting action of trestle, satisfy the conversion of trestle duty and walking states and adjust the scope of operation difference in height problem that in-cavity construction exists that solves; The trestle electrical system mainly is made up of warning lamp and walking locator, guarantees the safety of trestle when work and walking.
Trestle pontic design length is 30m, allows to use span 27m; Full-bridge width 5.7m, bridge floor allow current width 3.5m; Sidewalk width 0.65m.Through situ loading, the trestle crossstructure is stable, and the span centre maximum immunity value is 3.1mm, satisfies carrying and stability requirement.Trestle is following in working order, and hydraulic jack shrinks and makes four groups of walking train built on stilts; Forward and backward steel pier supports and lands, and bears trestle deadweight and bridge floor traveling vehicle and equipment load; The front end access bridge is taken and is placed on the excavation face, adopts temporary steel buttress support fixation, and the rear end access bridge lies against inverted arch and builds on the face, and it is current that the gradient is convenient to equipment; Caution system is opened and is formed sound and light alarm, guarantees the current safety of current equipment and personnel.After finishing under the trestle inverted arch concreting and reaching certain intensity, trestle need move forward an operation length, and promptly trestle enters walking states.Trestle is under walking states, and hydraulic jack extends, and running gear lands, and jacking trestle pontic and steel support built on stilts, and hydraulic jack is born the deadweight of trestle pontic; Forward and backward access bridge is packed up, built on stilts, and the releasing trestle body of a bridge connects with the interim of other construction part in the hole; Start walking positioning device, guarantee trestle walking safety; For example hydraulic crawler excavator or loader etc. connect with in-cavity construction equipment with the towing point of trestle front end by wire rope, and open or the locking running gear turns to function according to applying working condition, move 12m by pulling equipment to front haulage then, the conversion trestle enters duty, carries out the next one and builds the use circulation.
This trestle is the portable trestle in steel work bicycle road, is used for tunnel excavation and cast use, divides the 3 every joints of joint 9 meters assembly units between bearing, clear span 3.5m.The hydraulic moving device is respectively established at trestle two.Railing is established in the trestle both sides, and superstructure adopts formed steel construction.The top beam slab has a style of one's own, so that integral demounting.
Copy the form of structure of double individual layer Bailey bridge, the truss main longitudinal grider is selected 2[for use 20a, web member is selected I for use 10, lower transverse beam adopts I 28aLongeron is selected I for use 12.6δ 10The bridge floor steel plate is completely spread.
Load is arranged
(1) superstructure constant weight
(3.5 meters wide calculating)
δ 10Steel plate: 3.5 * 1 * 0.01 * 7.85 * 10=5.495KN/m
I 12.6Vertical distribution beam: 0.142KN/m
Main longitudinal grider: 0.4526KN/m
I 28aLower transverse beam: 0.435KN/m
The effect of sidewalk, right side is every 6m truss lower edge, every some 6KN
Each estimation 10KN of tire
Left side hydraulic control device trestle each 2.5KN of two
(2) live load
The 30t bogie is considered the least favorable shock effect when the trestle span centre loads, and last shovel material heavy (2t) is amplified the coefficient of impact 2 consider, is added to second group of tire and makes use, is 140KN.
Consider the trestle actual conditions, checking it influences trestle when current.
(2) the maximum internal force of operating mode
Maximum internal force of table 1 structure and deflectometer
Axle power: KN Shearing: KN Moment of flexure: KN.m Amount of deflection: cm
145.6 34.3 25.36 1.37728
Table 2 end reaction table
Joint F1 F2 F3
Text KN KN KN
5 0.068 -2.233 100.762
41 0 0 104.844
51 0.029 2.244 176.517
87 0 0 183.015
97 0.568 -1.909 106.851
133 0 0 110.471
143 -0.665 1.898 170.632
179 0 0 176.864
According to the amount of deflection limit value is 50mm, meets design requirement.Q235 steel intensity 210Mpa, shear strength 125Mpa, slenderness ratio limit value 120, stress ratio 0.95 all are illustrated in the stress diagram, all do not transfinite.
Superstructure internal force is manual checks
(1) the vertical distribution beam internal force of I12.6
1. 30t bogie
Effective span is 1.4m.
Bending moment maximum when monolateral wheel is arranged in span centre
M max1=1/4×70×1.4=24.5KN.m
Monolateral wheel is arranged in shearing maximum when closing on fulcrum
Q max1=70KN
2. dead load
q=0.284+0.01×0.35×78.5=0.56KN/m
M max2=1/8×0.56×1.4 2=0.14KN.m
Q max2=0.56×1.4/2=0.39KN
3. load combination
M max=1.2×24.5+1.4×0.14=29.6KN.m
Q max=1.2×70+1.4×0.39=84.55KN
σ=M/W=29.6×10 3/154=192MPa<[σ]=210Mpa
τ=Q/A=84.55×10 3/36.2=23.4MPa<[τ]=125Mpa
Satisfy
(2) bridge floor steel plate internal force
Getting 1 meter wide lath, calculate by one-way slabs, is least favorable when load is the 30t bogie.
Q=70/0.35=200KN/m
Mid span moment M OP=200 * (0.35) 2/ 8=3.1KN.m
Effective dispersion of distribution a=0.35m
W=bh 2/6=1×0.01 2/6=1.67×10 -5m 3
σ=M/W=3.1×10 3/1.67×10 -5=185.6MPa<[σ]=210Mpa
Satisfy
(3) I28a lower transverse beam internal force
Beam span (m): 3.500
1. dead load
Lotus (KN/m) P=2.12KN/m all connects up on the deadweight effect conversion beam
2. each section inner forces calculation result on the beam
Live in combination 1:1.2 perseverance+1.4
Section number: 1234567
Moment of flexure (kN.m): 0.000 21.626 43.033 64.219 85.186 95.316 87.259
Shearing (kN): 74.525 73.771 73.017 72.262 71.508-27.246-28.000
Section number: 89 10 11 12 13
Moment of flexure (kN.m): 78.983 70.486 61.769 52.833 37.960 0.000
Shearing (kN) :-28.754-29.508-30.262-31.017-129.771-130.525
4. local stable checking computations
Edge of a wing flakiness ratio B/T=3.50<allow flakiness ratio [B/T]=15.0
Web calculates ratio of height to thickness H0/Tw=27.25<allow ratio of height to thickness [H0/Tw]=80.0
5. simply supported beam cross-sectional strength checking computations
Maximum positive bending moment (kN.m): 95.316 (combinations: 1; Section: 6)
Intensity is calculated maximum stress (N/mm2): 178.625<f=215.000
The flexural strength checking computations are satisfied.
Maximum effect shearing (kN) :-130.525 (combinations: 1; Section: 13)
Shearing resistance calculated stress (N/mm2): 63.172<fv=125.000
Shear resistant capacity satisfies.
6. simply supported beam monolithic stability checking computations
Slenderness ratio λ y:14.056 outside the plane
Beam monolithic stability coefficient φ b:0.976
Maximum positive bending moment (kN.m): 95.316 (combinations: 1; Section: 6)
Monolithic stability calculates maximum stress (N/mm2): 192.168<f=215.000
The monolithic stability checking computations are satisfied.
7. simply supported beam amount of deflection checking computations
The △ standard combination: live in 1.0 perseverances+1.0
Section number: 1234567
Moment of flexure (kN.m): 0.000 15.591 31.000 46.224 61.266 68.541 62.799
Shearing (kN): 53.771 53.142 52.514 51.885 51.257-19.372-20.000
Section number: 89 10 11 12 13
Moment of flexure (kN.m): 56.874 50.766 44.474 38.000 27.258 0.000
Shearing (kN) :-20.628-21.257-21.885-22.514-93.142-93.771
Simply supported beam Calculation of Deflection result:
Section number: 1234567
Deflection value (mm): 0.000 1.421 2.751 3.901 4.784 5.318 5.467
Section number: 89 10 11 12 13
Deflection value (mm): 5.252 4.707 3.868 2.770 1.456 0.000
Cross section, maximum defluxion place: 7
Calculate maximum defluxion: 5.467 (mm)<allowable deflections: 8.750 (mm)
The checking computations of simply supported beam amount of deflection are satisfied.
Comprehensive aforementioned calculation result, the construction demand has all been satisfied in its every function design preferably.By adopting hydraulic system to realize the lifting of the body of a bridge and turning to, control easy, simple to operate, the efficient height.Trestle possesses running gear, and under the auxiliary traction of in-cavity construction equipment, the rapid and convenient in place of cutting to comprises that set-up procedure whenever moves once about about 40 minutes of transition.The trestle compact overall structure, and be equipped with caution system and walking positioning device, guaranteed the safety when trestle reaches walking in working order, improved on-the-spot civilized construction level.Tunnel construction packaged type trestle front end access bridge is set up on the excavation face, and the rear end is supported on the pouring concrete face, following minute two works areas of trestle bridge, and later half district is zone to be built, and can carry out inverted arch concreting; The zone is prepared for building by the Qian Ban district, the preparations such as reinforcing bar binding before can building.After later half district pouring construction is finished and reached certain intensity, can carry out the trestle mobile operating.Trestle moves forward one and builds segment length by the traction of in-cavity construction equipment, can carry out next working cycles.Structure selects for use pattern and specification all to satisfy existing code requirement.Removable trestle both can make the slag charge of excavation in the hole transport smoothly, can guarantee the concrete-lined normal construction operation of inverted arch again, improved effect greatly, shortened construction period.Not only guarantee construction period, also satisfied the needs of civilized construction.

Claims (8)

1. movable trestle, comprise main bridge (4), be arranged on the access bridge (1) of main bridge (4) rear and front end, the preceding support (2) that is arranged on main bridge (4) rear and front end and back support (7), it is characterized in that: this movable trestle also comprises hydraulic system and electrical system, the rear and front end of main bridge (4) is equipped with running gear, and main bridge (4) comprises distortion Bailey truss (8), bridge deck (9) and bridge deck bracing frame (10).
2. movable trestle according to claim 1 is characterized in that: described running gear is a wheel type traveling mechanism, comprises front-wheel (3) and trailing wheel (6), and front-wheel (3) is a steel wheel, and trailing wheel (6) is a steel core encapsulate wheel.
3. movable trestle according to claim 1, it is characterized in that: described hydraulic system mainly is made up of hydraulic oil container (5), oil circuit and hydraulic jack, hydraulic oil container (5) places the trestle afterbody, and oil circuit is fixed along the trestle truss, and the hydraulic jack cylinder body is fixed on the distortion Bailey truss (8).
4. movable trestle according to claim 1 is characterized in that: described electrical system comprises warning lamp and walking locator.
5. movable trestle according to claim 1 is characterized in that: described distortion Bailey truss (8) comprise wind up, lower edge, tiltedly string, string and junction plate thereof hang down.
6. movable trestle according to claim 1 is characterized in that: described bridge deck (9) comprise panel, vertical steel sleeper, horizontal steel sleeper.
7. movable trestle according to claim 1 is characterized in that: described bridge deck bracing frame (10) comprises crossbeam and fastener thereof.
8. movable trestle according to claim 1 is characterized in that: Bolt Connection is adopted on described distortion Bailey truss (8) top, and the bottom is hinged.
CNU2009200227397U 2009-03-03 2009-03-03 Mobile trestle bridge Expired - Fee Related CN201363154Y (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101550769B (en) * 2009-03-03 2012-08-22 中国水利水电第七工程局有限公司 Movable trestle
CN103154434A (en) * 2010-08-02 2013-06-12 路易斯·恩瑞克·贝塞拉·佩努拉 Closed trench tunnels
CN104372743A (en) * 2014-10-31 2015-02-25 中铁四局集团第二工程有限公司 Rapid construction method for trestle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101550769B (en) * 2009-03-03 2012-08-22 中国水利水电第七工程局有限公司 Movable trestle
CN103154434A (en) * 2010-08-02 2013-06-12 路易斯·恩瑞克·贝塞拉·佩努拉 Closed trench tunnels
CN104372743A (en) * 2014-10-31 2015-02-25 中铁四局集团第二工程有限公司 Rapid construction method for trestle
CN104372743B (en) * 2014-10-31 2016-05-18 中铁四局集团第二工程有限公司 Trestle rapid constructing method

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20091216

Termination date: 20120303