CN101942809A - Hanging-basket main-truss prepressing system - Google Patents

Hanging-basket main-truss prepressing system Download PDF

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Publication number
CN101942809A
CN101942809A CN 201010500560 CN201010500560A CN101942809A CN 101942809 A CN101942809 A CN 101942809A CN 201010500560 CN201010500560 CN 201010500560 CN 201010500560 A CN201010500560 A CN 201010500560A CN 101942809 A CN101942809 A CN 101942809A
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CN
China
Prior art keywords
truss
afterbody
pair
pulling force
main
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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.)
Pending
Application number
CN 201010500560
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Chinese (zh)
Inventor
梁超
张宏斌
李彬
李波
杨真
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First Engineering Co Ltd of CTCE Group
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First Engineering Co Ltd of CTCE Group
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by First Engineering Co Ltd of CTCE Group filed Critical First Engineering Co Ltd of CTCE Group
Priority to CN 201010500560 priority Critical patent/CN101942809A/en
Publication of CN101942809A publication Critical patent/CN101942809A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a hanging-basket main-truss prepressing system which is characterized in that two hanging-basket main trusses are horizontally placed on the same plane and oppositely arranged through each truss main beam, and a middle steel supporting seat as a prepressing fulcrum is arranged at the middle part between a pair of truss main beams; a tail steel supporting seat is arranged at the tail of each truss main beam, and a tail tension rib together penetrating the pair of truss main beams and the tail steel supporting seat is arranged to form a fixed structure between the pair of truss main beams and the tail steel supporting seat; and a front-end tension rib together penetrating the pair of truss main beams is arranged at the front end of each truss main beam, and prepressing pressure is applied to the pair of truss main beams at the front of each hanging-basket main truss through the traction for the front-end tension rib by a hydraulic jack. Hanging-basket main-truss prepressing is used for replacing a hanging-basket prepressing test, and the invention has the advantages of feasible scheme, simple concrete implementation, reliability, safety and high efficiency.

Description

The pre-pressing system of main truss cradle frame
Technical field
The present invention relates to the bridge construction equipment, the pre-pressing system of main truss cradle frame of more specifically saying so.
Background technology
Hanging Basket is used for outstanding the pouring of bridge beam body built construction, after the assembly unit of finishing Hanging Basket, reliability and its nonelastic deformation of elimination for the checking Hanging Basket, measure the practical distortion amount of Hanging Basket under different loads, so that in amount of deflection control, revise the shuttering absolute altitude, must before using for the first time, carry out precompressed to Hanging Basket.Preloading method commonly used at present has sandbag method, reinforcing bar preloading or water tank method.Specifically be on the soffit formwork of Hanging Basket, lifting sandbag, preloading reinforcing bar, or load one group of water tank, and progressively load, unload according to designing requirement subsequently, make it reach the purpose of eliminating nonelastic deformation, and the elastic deformation amount who measures Hanging Basket.There is more problem in this conventional method, mainly comprises:
1, the test preparation time is long, the loading difficulty is big, preloading is highly high, and the high-altitude precompressed does to make operation site to have potential safety hazard;
2, because the process of the test complexity causes testing expenses big;
3, in a single day in process of the test, pinpoint the problems,, cause the time-lag of dealing with problems, therefore increased the possibility that security incident takes place because the discharge time of sandbag, reinforcing bar or the water tank of preloading is longer.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology problem, provide a kind of main truss cradle frame pre-pressing system, makes the precompressed process of the test for Hanging Basket obtain simplifying by the precompressed to the main truss cradle frame, and safer.
Technical solution problem of the present invention adopts following technical scheme:
The design feature of the pre-pressing system of main truss cradle frame of the present invention is: at grade, two main truss cradle framves are horizontal positioned, two main truss cradle framves of horizontal positioned are to be oppositely arranged with separately truss girder, between a pair of truss girder that is oppositely arranged, the middle part that is positioned at the truss girder is provided as the middle part steel bearing of precompressed fulcrum, and the middle girder of described middle part steel bearing and main truss cradle frame is on the same straight line; The afterbody that is positioned at the truss girder is provided with the afterbody steel support, and the afterbody pulling force muscle that runs through a pair of truss girder and afterbody steel support jointly is set, and forms the fixed structure between a pair of truss girder and the afterbody steel support; Front end at described truss girder, the front end pulling force muscle that runs through a pair of truss girder jointly is set, front end at a slice main truss cradle frame is provided with hydraulic jack, and described hydraulic jack applies preload pressure by the front end that is pulled in the main truss cradle frame to described front end pulling force muscle to described a pair of truss girder.
The design feature of the pre-pressing system of main truss cradle frame of the present invention also is:
Employing has the feed-through hydraulic jack of punching duct well, and the punching duct well that described front end pulling force muscle one end passes hydraulic jack is fixed, other end anchoring on another sheet main truss cradle frame.
The front end outside and the afterbody outside at described two main truss cradle framves are respectively arranged with front end distribution beam and afterbody distribution beam, and described front end pulling force muscle passes described front end distribution beam and is provided with; Described afterbody pulling force muscle passes described afterbody distribution beam and is provided with.
The present invention adopts hydraulic jack and high tensile reinforcement to add force method to pressurize, and compared with the prior art, beneficial effect of the present invention is embodied in:
1, precompressed is the master data of observing as linearity for the distortion of measuring Hanging Basket, and the cross section of linear observation station control is each section of building termination deck-molding and horizontal plane.And behind the smart bundle of the Hanging Basket employing screw thread suspension rod, the distortion of preceding lower transverse beam is consistent with the distortion of preceding top rail, so the distortion of Hanging Basket mainly is the distortion of main couple.The present invention substitutes the precompressed test to Hanging Basket itself by the precompressed to the main truss cradle frame, and is effective.
2, the present invention compares the prior art process of the test and is simplified greatly, and safety is good, has thoroughly eliminated the potential safety hazard of work high above the ground.
3, loading of the present invention and discharge time short, simple to operate, without the preparation of long period, simple and efficient, improved operating efficiency greatly.
4, the present device input cost is low, and the precompressed loading force can accurately be controlled; When pinpointing the problems, can in time unload.
Description of drawings
Fig. 1 is a plane structure schematic diagram of the present invention.
Number in the figure: 1 main truss cradle frame, 11 truss girders, 12 middle girders, 21 front end pulling force muscle, 22 afterbody pulling force muscle, 3 hydraulic jack, 4 front end distribution beam, 5 afterbody distribution beam, 61 middle part steel bearings, 62 afterbody steel supports.
The specific embodiment
Referring to Fig. 1, at grade, two main truss cradle framves 1 are horizontal positioned, between two main truss cradle framves 1 of horizontal positioned are to be oppositely arranged with separately truss girder 11.
Between a pair of truss girder 11 that is oppositely arranged, the middle part that is positioned at truss girder 11 is provided with middle part steel bearing 61, and as the precompressed fulcrum, middle part steel bearing 61 is on the same straight line with the middle girder 12 of main truss cradle frame 1 with middle part steel bearing 61;
Between a pair of truss girder 11 that is oppositely arranged, the afterbody that is positioned at truss girder 11 is provided with afterbody steel support 62, and the afterbody pulling force muscle 22 that runs through a pair of truss girder 11 and afterbody steel support 62 jointly is set, with the two ends of afterbody pulling force muscle 22 separately the anchor on the truss girder 11 of place one side form fixed structure between a pair of truss girder 11 and the afterbody steel support 62;
Between a pair of truss girder 11 that is oppositely arranged, be positioned at the front end of truss girder 11, the front end pulling force muscle 21 that runs through a pair of truss girder 11 jointly is set, the front end of a slice main truss cradle frame is provided with hydraulic jack 3 therein, hydraulic jack 3 is by the traction to front end pulling force muscle 21, applies preload pressure at the front end of main truss cradle frame to a pair of truss girder 11.
In concrete the enforcement, the corresponding structure setting also can for:
Employing has the feed-through hydraulic jack 3 of punching duct well, and its permissible load is not less than 100 tons, and front end pulling force muscle 21 1 ends pass the punching duct well of hydraulic jack 3 and fix, and the other end is anchored on another sheet main truss cradle frame.
Stressed even in order to guarantee in the pre-power process, the front end outside and the afterbody outside at two main truss cradle framves 1 are respectively arranged with front end distribution beam 4 and afterbody distribution beam 5, and front end pulling force muscle 21 passes front end distribution beam 4 and is provided with; Afterbody pulling force muscle 22 passes afterbody distribution beam 5 and is provided with.Be specially: be positioned at hydraulic jack 3 places one side, hydraulic jack 3 places on the front end distribution beam of a corresponding side, and the termination of front end pulling force muscle is passed the punching duct well that passes hydraulic jack 3 after the front end distribution beam of a corresponding side again and fixed; The other end of front end pulling force muscle passes opposite side front end distribution beam equally on another sheet main truss cradle frame, and on the anchoring opposite side front end distribution beam; The afterbody distribution beam of a corresponding side is passed at the two ends of afterbody pulling force muscle 22 respectively, and is anchored on the afterbody distribution beam 5.
Front end distribution beam 4 is reserved with the spacing that can supply the pulling force muscle to pass for the welding of Two bors d's oeuveres i iron constitutes between its frange plate, this spacing should be not less than the diameter of the front end pulling force muscle of twice.
Afterbody distribution beam 5 is that the back-to-back welding of Two bors d's oeuveres channel-section steel constitutes, and reserves the spacing that can supply afterbody pulling force muscle to pass between the channel-section steel web, and this spacing should be not less than the diameter of the afterbody pulling force muscle of twice.
Middle part steel bearing 61 and afterbody steel support 62 are to be made of the welding of four sides steel plate, and steel plate thickness is 2cm.
Front end pulling force muscle and afterbody pulling force muscle are φ 32 fining twisted steels.
The precompressed process:
Before the precompressed, hydraulic jack and pressure meter thereof are matched verification.
During precompressed, the classification weight of the maximum load distribution situation calculated value of using according to structure loads, and when jack reaches every grade of load, should be maintained fixed a period of time, treat that pointer is stable after, measure deformation values; Same deformation values at different levels, load shedding, and measurement distortion, the record data measured during unloading.
After each level loads, must in time check the main truss cradle frame, in time make the judgement that can continue to load.
Load load when reaching 1.2 times of maximum applied load, should keep stable, treat to unload after nonelastic deformation has all been eliminated.

Claims (3)

1. the pre-pressing system of main truss cradle frame, it is characterized in that: at grade, two main truss cradle framves (1) are horizontal positioned, two main truss cradle framves (1) of horizontal positioned are to be oppositely arranged with separately truss girder (11), between a pair of truss girder (11) that is oppositely arranged, the middle part that is positioned at truss girder (11) is provided as the middle part steel bearing (61) of precompressed fulcrum, and described middle part steel bearing (61) is on the same straight line with the middle girder (12) of main truss cradle frame (1); The afterbody that is positioned at truss girder (11) is provided with afterbody steel support (62), and the afterbody pulling force muscle (22) that runs through a pair of truss girder (11) and afterbody steel support (62) jointly is set, forms the fixed structure between a pair of truss girder (11) and the afterbody steel support (62); Front end at described truss girder (11), the front end pulling force muscle (21) that runs through a pair of truss girder (11) jointly is set, front end at a slice main truss cradle frame is provided with hydraulic jack (3), and described hydraulic jack (3) applies preload pressure by the front end that is pulled in the main truss cradle frame to described front end pulling force muscle (21) to described a pair of truss girder (11).
2. the pre-pressing system of main truss cradle frame according to claim 1, it is characterized in that adopting feed-through hydraulic jack (3) with punching duct well, the punching duct well that described front end pulling force muscle (21) one ends pass hydraulic jack (3) is fixed, other end anchoring on another sheet main truss cradle frame.
3. according to the pre-pressing system of the described main truss cradle frame of claim 1, it is characterized in that the front end outside and the afterbody outside at described two main truss cradle framves (1), be respectively arranged with front end distribution beam (4) and afterbody distribution beam (5), described front end pulling force muscle (21) passes described front end distribution beam (4) and is provided with; Described afterbody pulling force muscle (22) passes described afterbody distribution beam (5) and is provided with.
CN 201010500560 2010-09-30 2010-09-30 Hanging-basket main-truss prepressing system Pending CN101942809A (en)

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CN 201010500560 CN101942809A (en) 2010-09-30 2010-09-30 Hanging-basket main-truss prepressing system

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102268858A (en) * 2011-06-20 2011-12-07 江苏恩纳斯重工机械有限公司 Cradle for suspension pouring of arch-type bridge
CN102704410A (en) * 2012-06-28 2012-10-03 中铁十三局集团第一工程有限公司 Closure mechanism for concrete-filled steel tube arch bride rib
CN103048198A (en) * 2012-12-27 2013-04-17 中铁港航局集团有限公司 Load test method for rhombus hanging basket
CN103528842A (en) * 2013-10-14 2014-01-22 中铁十九局集团有限公司 Static load test device and static load test method for cradle trusses
CN103628422A (en) * 2013-10-30 2014-03-12 中建三局建设工程股份有限公司 Counter-force type stay rope hanging basket prepressing device and implement method thereof
CN104746438A (en) * 2015-01-28 2015-07-01 中国水利水电第五工程局有限公司 Prepressing method for hanging basket jack
CN105714688A (en) * 2016-03-13 2016-06-29 中交一公局桥隧工程有限公司 Reverse prepressing device for front-support movable suspended scaffolding

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Publication number Priority date Publication date Assignee Title
JPH11256521A (en) * 1998-03-09 1999-09-21 Sumitomo Constr Co Ltd Bridge erection device
CN201128884Y (en) * 2007-11-15 2008-10-08 中交第一公路工程局有限公司 Loading prepressing device for suspended bracket
CN201574359U (en) * 2009-10-16 2010-09-08 中铁十七局集团第二工程有限公司 Hanging basket equivalent preloading device used in high-pier large-span bridge construction

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Publication number Priority date Publication date Assignee Title
JPH11256521A (en) * 1998-03-09 1999-09-21 Sumitomo Constr Co Ltd Bridge erection device
CN201128884Y (en) * 2007-11-15 2008-10-08 中交第一公路工程局有限公司 Loading prepressing device for suspended bracket
CN201574359U (en) * 2009-10-16 2010-09-08 中铁十七局集团第二工程有限公司 Hanging basket equivalent preloading device used in high-pier large-span bridge construction

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102268858A (en) * 2011-06-20 2011-12-07 江苏恩纳斯重工机械有限公司 Cradle for suspension pouring of arch-type bridge
CN102268858B (en) * 2011-06-20 2013-01-02 江苏恩纳斯重工机械有限公司 Cradle for suspension pouring of arch-type bridge
CN102704410A (en) * 2012-06-28 2012-10-03 中铁十三局集团第一工程有限公司 Closure mechanism for concrete-filled steel tube arch bride rib
CN103048198A (en) * 2012-12-27 2013-04-17 中铁港航局集团有限公司 Load test method for rhombus hanging basket
CN103528842A (en) * 2013-10-14 2014-01-22 中铁十九局集团有限公司 Static load test device and static load test method for cradle trusses
CN103528842B (en) * 2013-10-14 2015-10-28 中铁十九局集团有限公司 Hanging Basket truss static-load testing device and Static Load Test Method
CN103628422A (en) * 2013-10-30 2014-03-12 中建三局建设工程股份有限公司 Counter-force type stay rope hanging basket prepressing device and implement method thereof
CN103628422B (en) * 2013-10-30 2016-04-13 中建三局建设工程股份有限公司 A kind of anti-force type dragging suspension basket prepressing device and implementation method thereof
CN104746438A (en) * 2015-01-28 2015-07-01 中国水利水电第五工程局有限公司 Prepressing method for hanging basket jack
CN105714688A (en) * 2016-03-13 2016-06-29 中交一公局桥隧工程有限公司 Reverse prepressing device for front-support movable suspended scaffolding

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