CN105484165A - Integrated prestress tensioning frame structure and manufacturing and using methods thereof - Google Patents
Integrated prestress tensioning frame structure and manufacturing and using methods thereof Download PDFInfo
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- CN105484165A CN105484165A CN201610020139.1A CN201610020139A CN105484165A CN 105484165 A CN105484165 A CN 105484165A CN 201610020139 A CN201610020139 A CN 201610020139A CN 105484165 A CN105484165 A CN 105484165A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention provides an integrated prestress tensioning frame structure which is used for tension construction of beam slabs by a post-tensioning method. The integrated prestress tensioning frame structure is a square frame, and moving wheels are installed at the bottom of the square frame; a clapboard is arranged in the middle of the square frame so as to divide the square frame into a left part and a right part, wherein the left part is a tensioning room, and the right part is an operating room; in the tensioning room, a lifting beam is welded at the bottom of a longitudinal beam at the top, a chain block is installed on the lifting beam, the chain block is connected with a jack, and a guard plate is arranged in the rear of the tensioning room; in the operating room, a bottom plate is arranged at the bottom of the frame, a top plate is arranged at the top, and a folding operating desk is installed on the clapboard; and a special fixing frame for fixedly placing an intelligent tensioning instrument is also arranged on the bottom plate, thereby ensuring that the intelligent tensioning instrument does not generate displacement in a moving process. The integrated prestress tensioning frame structure is simple, convenient to manufacture and low in cost; the operating room and the tensioning room form the integrated frame, so that the frame structure is convenient to move and simple in operation; and the guard plate and the clapboard are arranged, so that the safety in the construction process is effectively guaranteed on the premise that the line of sight of an operator in the operating room is not blocked.
Description
Technical field
The present invention relates to stretching construction technical field, be specifically related to a kind of integrated prestressed stretch-draw frame construction and making and use method thereof.
Background technology
At present, prestressed reinforced concrete construction because its cross section is little, the advantage such as large, the crack resistance of rigidity and good endurance, be widely applied in field of civil engineering.Wherein, the Fabricated Beam-Slab of bridge engineering mostly adopts post stretching precasting process, namely after beam slab concrete strength reaches some strength, in duct, penetrates presstressed reinforcing steel, using concrete component as supporting tensioned prestressing bar, then with special ground tackle, presstressed reinforcing steel anchoring is formed permanent pre-applied force.As everyone knows, one of tensioner of Shi Hanzhang-jack, weight comparatively large (about 200kg), need adopt precasting yard portal frame or adopt Chain block to be shifted by attached font support of helping others when changing cable stretching.Meanwhile, for avoiding may causing because of disconnected rope, stripped thread phenomenon the event of hurting sb.'s feelings in stretching process, inaccurate people from station, front, beam two ends during the stretch-draw of operational procedure regulation, operating personnel should stand in the side of prestress steel twist line position, and beam-ends should be baffled.
In conventional construction, jack change the prefabricated portal frame of the more employing of Suo Yiwei, causing portal frame to have enough to meet the need the low or beam slab tension process of utilization rate affects by door frame use.And beam-ends baffle plate generally adopts easy triangular supports baffle plate, holding capacity is low.
Meanwhile, the state-of-the-art technique-intelligent tensioning in current domestic prestressed stretch-draw field is widely applied.Intelligent tensioning refers to and does not rely on workman's Non-follow control, and utilizes control with computational intelligence technology, by instrument automatic operation, completes the stretching construction of steel strand.Because of its high accuracy and stability, interference from human factor can be got rid of completely, effectively guarantee tensioning construction quality.But limit by field condition, for the instrument particularly computer of intelligent tensioning, often can only look for local placement temporarily, expose to the weather, work under bad environment.
Summary of the invention
The object of the present invention is to provide a kind of integrated prestressed stretch-draw frame construction and making and use method thereof, very heavy placement issue of taking one's place Suo Yiwei lifting problem and the corollary equipment such as intelligent tensioning instrument and computer during solution post stretching beam slab intelligent tensioning, and the protection safety problem in stretching process.
For realizing above-mentioned technical purpose, the present invention adopts following technical scheme:
A kind of integrated prestressed stretch-draw frame construction, for in the construction of post stretching beam slab intelligent tensioning, entirety is tetragonal body framework, be welded by column and the horizontal beam be connected between column, described horizontal beam comprises crossbeam and longeron, it is characterized in that: the bottom column correspondence position of described tetragonal body framework is provided with movable pulley; Be provided with dividing plate between centre two root post of described tetragonal body framework, tetragonal body framework is divided into left and right two parts by described dividing plate, and the left side is between stretch-draw, and the right is operation room; In between described stretch-draw, at the lifting beam of a bottom welding transverse direction of two longerons in top, described lifting beam is provided with Chain block, described Chain block connects stretch-draw jack by hook, precast beam to be tensioned laterally enters before between stretch-draw, the guard of setting up defences below between stretch-draw; In described operation room, base of frame horizontal beam is equipped with base plate, and frame roof is provided with top board, described dividing plate is provided with folding operation platform; Described base plate is also provided with the special fixed frame for fixed in position intelligent tensioning instrument, guarantees that it is not subjected to displacement in moving process.
As preferred technical scheme, described dividing plate is punching steel net plate, and its thickness range is 10 ~ 20mm, and mesh diameter scope is 10 ~ 40mm.
Preferably, described lifting beam is connected by hanging ring with between Chain block; Described hanging ring is sleeved on lifting beam, and the bottom of hanging ring is hung with Chain block.
Preferably, described folding operation platform comprises operation platen and is arranged on the collapsible supporting leg on operation platen bottom surface, and the other end of described collapsible supporting leg is fixed on the wall of dividing plate.
Preferably, described operation platen is steel plate or the plank with reinforcing frame.
Preferably, described top board and base plate are steel plate, and its scope is 5 ~ 20mm, and the thickness range of described shoulder guard is 10 ~ 20mm.
Preferably, the height of described tetragonal body framework is at least than the maximum height height 500mm of precast beam, and the longitudinal length between stretch-draw is that the width of precast beam adds 200mm, and the longitudinal length of operation room is 1000mm; The lateral extent of tetragonal body framework is 1000mm.
Preferably, described crossbeam, longeron and column all adopt 14# channel-section steel; Described lifting beam adopts 14# steel I-beam.
The present invention also provides the preparation method of above-mentioned integrated prestressed stretch-draw frame construction, comprises the steps:
Step one, material prepare: cutting groove steel, for longeron, crossbeam and column, cuts steel plate and forms protective baffle plate, and cut punched-plate and form dividing plate, its size is all determined according to the sectional dimension of precast beam to be tensioned;
Step 2, welding tetragonal body framework: it is assembled to carry out body tetragonal body frame welding, bottom column correspondence position installs 6 movable pulleys, then between middle two root posts, establishes dividing plate, tetragonal body framework is divided into left and right two parts, the left side is between stretch-draw, and the right is operation room;
Step 3, between stretch-draw, install tensioning equipment: the lifting beam of a bottom welding transverse direction of two longerons in top between stretch-draw, it is arranged hanging ring connection Chain block, bottom connects jack by hook;
Step 4, operation room arrange corollary equipment: lay base plate bottom clipping room, top lay top board, dividing plate is installed folding operation platform;
Step 5, on operation room base plate, establish special fixed frame for fixed in position intelligent tensioning instrument, guarantee that it is not subjected to displacement in moving process, so far, prepared by integrated prestressed stretch-draw frame construction.
In addition, the present invention also provides the using method of above-mentioned integrated prestressed stretch-draw frame construction, it is characterized in that:
Step one, frame construction in place: promote the assembled integrated tensioning frame shelf structure completed of processing, the movable pulley utilizing bottom to install drags the front end to precast beam to be tensioned, and make just to beam slab between stretch-draw, now operation room is positioned on the right side of beam-ends;
Step 2, operation room are arranged: be placed in by intelligent tensioning instrument on the special fixed frame on operation room base plate, open the folding operation platform that dividing plate is installed, lay computer thereon, carry out computer, intelligent tensioning instrument is connected with the data letter between jack;
Step 3, jack are in place: utilize the Chain block hook be installed on lifting beam to connect jack, also fix with it before utilizing Chain block jack to be displaced to precast beam prestressing tendon to be tensioned;
Step 4, stretching process: operating personnel are positioned at operation room, carry out Intelligent Instrument operation and conputer controlled, carries out real time record and data wire transmission;
Step 5, displacement change bundle: after a branch of stretch-draw completes, the transverse shift up and down utilizing Chain block to carry out jack changes rope, until this film girder plate prestress bundle all completes;
Step 6, be positioned over jack between stretch-draw base plate on, promote whole tensioning frame shelf structure and move to lower a slice precast beam position to be drawn, repeat above-mentioned steps one to step 5, until complete whole beam slab stretch-draw work.
Top between stretch-draw of the present invention establishes Chain block to change Suo Yiwei for jack, backboard inlays that backboard is double makees shoulder guard, and the correct frame of beam sides is set between intelligent operation, for placing intelligent tensioning instrument and computer, compared with prior art, technical advantage of the present invention is:
1, be traversing carriage, structure is simple, is easy to processing and conveniently moving;
2, be provided with the operation room can placing intelligent tensioning instrument and computer, optimize construction environment, be integrated, during construction point transfer, only need to promote handling frame to shift, convenient transfer, during use, without the need to carrying out moving of any plant and instrument, can directly construct, time saving and energy saving;
3, protection effect is good, and on the one hand between stretch-draw, back inlays that backboard is double makees shoulder guard, reliably solid, meets related specifications requirement.Between on the other hand between operation room and stretch-draw, punching steel plate is set, under the prerequisite not stopping operating personnel's sight line in operation room, the safety in effective guarantee operating personnel work progress, protection is good;
4, except movable pulley, the special crossbeam small size component of all the other materials etc., all can utilizing works current material, can make full use of channel-section steel clout, and can fully reclaim after completion, and input cost is few.
Accompanying drawing explanation
Fig. 1 is the perspective view of the integrated prestressed stretch-draw frame construction that the present invention relates to;
Fig. 2 is the plan structure schematic diagram of the integrated prestressed stretch-draw frame construction that the present invention relates to;
Fig. 3 is the facade structures schematic diagram of the integrated prestressed stretch-draw frame construction that the present invention relates to.
Reference numeral: 2-crossbeam, 1-longeron, 3-lifting beam, 4-column, 5-movable pulley, 6-base plate, 7-protective baffle plate, 8-Chain block, 9-precast beam, 10-dividing plate, 11-bracing frame, 12-prestressing tendon, 13-top board, 14-intelligent tensioning instrument, 15-folding operation platform, 15.1-operate platen, the collapsible supporting leg of 15.2-, 16-hanging ring.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As Fig. 1 ~ 3, the present invention relates to a kind of integrated prestressed stretch-draw frame construction, for in the construction of post stretching beam slab intelligent tensioning, entirety is tetragonal body framework, be welded by column 4 and the horizontal beam be connected between column, described horizontal beam comprises crossbeam 1 and longeron 2, it is characterized in that: the bottom column correspondence position of described tetragonal body framework is provided with movable pulley 5, six roots of sensation column 4 altogether, corresponding 6 movable pulleys, dividing plate 10 is provided with between centre two root post of described tetragonal body framework, described dividing plate 10 is punching steel net plate, its thickness range is 10 ~ 20mm, mesh diameter scope is 10 ~ 40mm, tetragonal body framework is divided into left and right two parts by it, the left side is between stretch-draw, the right is operation room, in between described stretch-draw, at the lifting beam 3 of a bottom welding transverse direction of two longerons 2 in top, described lifting beam 3 is provided with Chain block 8, described lifting beam 3 is connected by hanging ring 16 with between Chain block 8, described hanging ring 16 is sleeved on lifting beam 3, and the bottom of hanging ring 16 is hung with Chain block 8.Described Chain block 8 connects stretch-draw jack by hook, and precast beam 9 to be tensioned laterally enters above between stretch-draw, guard 7 of setting up defences after between stretch-draw; In described operation room, base of frame horizontal beam is equipped with base plate 6, frame roof is provided with top board 13, sunshine and rain resistant.Described dividing plate 10 is provided with folding operation platform 15, the collapsible supporting leg 15.2 that described folding operation platform 15 comprises operation platen 15.1 and is arranged on operation platen bottom surface, the other end of described collapsible supporting leg 15.2 is fixed on the wall of dividing plate 10, and described operation platen 15.1 is plank or steel plate with reinforcing frame.Described base plate 6 is also provided with the special fixed frame for fixed in position intelligent tensioning instrument 14, guarantees that it is not subjected to displacement in moving process.
In frame structure material therefor, form the crossbeam 1 of support, longeron 2 and column 4 and all adopt 14# channel-section steel, top adopts 14# i iron for the lifting beam 3 installing Chain block, and protective baffle plate 7 and dividing plate 10 adopt 1cm steel plate, make baffle plate, shaped steel, steel plate all adopt and are welded to connect.The height of described tetragonal body framework is at least than the maximum height height 500mm of precast beam 9, and the longitudinal length between stretch-draw is that the width of precast beam 9 adds 200mm, and the longitudinal length of operation room is 1000mm; The lateral extent of tetragonal body framework is 1000mm.
The present invention also provides the preparation method of above-mentioned integrated prestressed stretch-draw frame construction, comprises the steps:
Step one, material prepare: cutting groove steel, for longeron 2, crossbeam 1 and column 4, cuts steel plate and forms protective baffle plate 7, and cut punched-plate and form dividing plate 10, its size is all determined according to the sectional dimension of precast beam 9 to be tensioned;
Step 2, welding tetragonal body framework: it is assembled to carry out body tetragonal body frame welding, bottom column correspondence position installs 6 movable pulleys 5, then between middle two root posts, establishes dividing plate 10, tetragonal body framework is divided into left and right two parts, the left side is between stretch-draw, and the right is operation room;
Step 3, between stretch-draw, install tensioning equipment: the lifting beam 3 of a bottom welding transverse direction of two longerons 2 in top between stretch-draw, it is arranged hanging ring 16 connection Chain block 8, bottom connects jack by hook;
Step 4, operation room arrange corollary equipment: lay base plate 6 bottom clipping room, top lay top board 13, dividing plate 10 is installed folding operation platform 15;
Step 5, on operation room base plate 6, establish special fixed frame for fixed in position intelligent tensioning instrument 14, guarantee that it is not subjected to displacement in moving process, so far, prepared by integrated prestressed stretch-draw frame construction.
In addition, the present invention also provides the using method of above-mentioned integrated prestressed stretch-draw frame construction, it is characterized in that:
Step one, frame construction in place: promote the assembled integrated tensioning frame shelf structure completed of processing, the movable pulley 5 utilizing bottom to install drags the front end to precast beam 9 to be tensioned, and make just to beam slab between stretch-draw, now operation room is positioned on the right side of beam-ends;
Step 2, operation room are arranged: be placed in by intelligent tensioning instrument 14 on the special fixed frame on operation room base plate 6, open the folding operation platform 15 that dividing plate 10 is installed, lay computer thereon, carry out computer, intelligent tensioning instrument 14 is connected with the data letter between jack;
Step 3, jack are in place: utilize the Chain block 8 be installed on lifting beam 3 to link up with and connect jack, also fix with it before utilizing Chain block jack to be displaced to precast beam prestressing tendon to be tensioned 12;
Step 4, stretching process: operating personnel are positioned at operation room, carry out Intelligent Instrument operation and conputer controlled, carries out real time record and data wire transmission;
Step 5, displacement change bundle: after a branch of stretch-draw completes, the transverse shift up and down utilizing Chain block 8 to carry out jack changes rope, until this film girder plate prestress bundle all completes;
Step 6, be positioned over jack between stretch-draw base plate on, promote whole tensioning frame shelf structure and move to lower a slice precast beam position to be drawn, repeat above-mentioned steps one to step 5, until complete whole beam slab stretch-draw work.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an integrated prestressed stretch-draw frame construction, for in the construction of post stretching beam slab intelligent tensioning, entirety is tetragonal body framework, be welded by column (4) and the horizontal beam be connected between column, described horizontal beam comprises crossbeam (1) and longeron (2), it is characterized in that: the bottom column correspondence position of described tetragonal body framework is provided with movable pulley (5); Be provided with dividing plate (10) between centre two root post of described tetragonal body framework, tetragonal body framework is divided into left and right two parts by described dividing plate (10), and the left side is between stretch-draw, and the right is operation room; In between described stretch-draw, the lifting beam (3) of a bottom welding transverse direction of two longerons (2) at top, described lifting beam (3) is provided with Chain block (8), described Chain block (8) connects stretch-draw jack by hook, precast beam (9) to be tensioned laterally enters before between stretch-draw, the guard (7) of setting up defences below between stretch-draw; In described operation room, base of frame horizontal beam is equipped with base plate (6), frame roof is provided with top board (13), described dividing plate (10) is provided with folding operation platform (15); Described base plate (6) is also provided with the special fixed frame for fixed in position intelligent tensioning instrument (14), guarantees that it is not subjected to displacement in moving process.
2. integrated prestressed stretch-draw frame construction according to claim 1, is characterized in that: described dividing plate (10) is punching steel net plate, and its thickness range is 10 ~ 20mm, and mesh diameter scope is 10 ~ 40mm.
3. integrated prestressed stretch-draw frame construction according to claim 1, is characterized in that: be connected by hanging ring (16) between described lifting beam (3) with Chain block (8); Described hanging ring (16) is sleeved on lifting beam (3), and the bottom of hanging ring (16) is hung with Chain block (8).
4. integrated prestressed stretch-draw frame construction according to claim 1, it is characterized in that: described folding operation platform (15) comprises operation platen (15.1) and is arranged on the collapsible supporting leg (15.2) on operation platen bottom surface, and the other end of described collapsible supporting leg (15.2) is fixed on the wall of dividing plate (10).
5. integrated prestressed stretch-draw frame construction according to claim 1, is characterized in that: described operation platen (15.1) is for steel plate or with the plank reinforcing frame.
6. integrated prestressed stretch-draw frame construction according to claim 1, is characterized in that: described top board (13) and base plate (6) are steel plate, and thickness range is 5 ~ 20mm; The thickness range of described shoulder guard (7) is 10 ~ 20mm.
7. integrated prestressed stretch-draw frame construction according to claim 1, it is characterized in that: the height of described tetragonal body framework is at least than the maximum height height 500mm of precast beam (9), longitudinal length between stretch-draw is that the width of precast beam (9) adds 200mm, and the longitudinal length of operation room is 1000mm; The lateral extent of tetragonal body framework is 1000mm.
8. integrated prestressed stretch-draw frame construction according to claim 1, is characterized in that: described crossbeam (1), longeron (2) and column (4) are 14# channel-section steel; Described lifting beam (3) is 14# steel I-beam.
9. the preparation method of the integrated prestressed stretch-draw frame construction according to claim 1 ~ 8 any one, is characterized in that, comprise the steps:
Step one, material prepare: cutting groove steel is for longeron (2), crossbeam (1) and column (4), cut steel plate and form protective baffle plate (7), cut punched-plate and form dividing plate (10), its size is all determined according to the sectional dimension of precast beam (9) to be tensioned;
Step 2, welding tetragonal body framework: it is assembled to carry out body tetragonal body frame welding, bottom column correspondence position installs 6 movable pulleys (5), then between middle two root posts, establishes dividing plate (10), tetragonal body framework is divided into left and right two parts, the left side is between stretch-draw, and the right is operation room;
Step 3, between stretch-draw, install tensioning equipment: the lifting beam (3) of a bottom welding transverse direction of two longerons (2) in top between stretch-draw, it is arranged hanging ring (16) connection Chain block (8), bottom connects jack by hook;
Step 4, arrange corollary equipment at operation room: lay base plate (6) bottom clipping room, top board (13) is laid at top, folding operation platform (15) is installed dividing plate (10) is upper;
Step 5, on operation room base plate (6), establish special fixed frame for fixed in position intelligent tensioning instrument (14), guarantee that it is not subjected to displacement in moving process, so far, prepared by integrated prestressed stretch-draw frame construction.
10. the using method of integrated prestressed stretch-draw frame construction according to claim 9, is characterized in that:
Step one, frame construction in place: promote the assembled integrated tensioning frame shelf structure completed of processing, the movable pulley (5) utilizing bottom to install drags the front end to precast beam (9) to be tensioned, make just to beam slab between stretch-draw, now operation room is positioned on the right side of beam-ends;
Step 2, operation room are arranged: be placed in by intelligent tensioning instrument (14) on the special fixed frame on operation room base plate (6), open the upper folding operation platform (15) installed of dividing plate (10), lay computer thereon, carry out computer, intelligent tensioning instrument (14) is connected with the data letter between jack;
Step 3, jack are in place: utilize Chain block (8) hook be installed on lifting beam (3) to connect jack, utilize Chain block jack to be displaced to precast beam prestressing tendon to be tensioned (12) front and fix with it;
Step 4, stretching process: operating personnel are positioned at operation room, carry out Intelligent Instrument operation and conputer controlled, carries out real time record and data wire transmission;
Step 5, displacement change bundle: after a branch of stretch-draw completes, the transverse shift up and down utilizing Chain block (8) to carry out jack changes rope, until this film girder plate prestress bundle all completes;
Step 6, be positioned over jack between stretch-draw base plate on, promote whole tensioning frame shelf structure and move to lower a slice precast beam position to be drawn, repeat above-mentioned steps one to step 5, until complete whole beam slab stretch-draw work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610020139.1A CN105484165B (en) | 2016-01-13 | 2016-01-13 | Integrated prestress tensioning frame structure and manufacturing and using methods thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610020139.1A CN105484165B (en) | 2016-01-13 | 2016-01-13 | Integrated prestress tensioning frame structure and manufacturing and using methods thereof |
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| CN105484165A true CN105484165A (en) | 2016-04-13 |
| CN105484165B CN105484165B (en) | 2017-03-22 |
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| CN201610020139.1A Expired - Fee Related CN105484165B (en) | 2016-01-13 | 2016-01-13 | Integrated prestress tensioning frame structure and manufacturing and using methods thereof |
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Cited By (4)
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| CN107489104A (en) * | 2017-08-31 | 2017-12-19 | 浙江工业大学 | A kind of girder pre-stressed steel Shu Zhangla protectors of T |
| CN109262822A (en) * | 2018-10-29 | 2019-01-25 | 江苏华江祥瑞现代建筑发展有限公司 | It is a kind of for producing the prestressing force mixed production line of concrete slab, beams of concrete |
| CN114717981A (en) * | 2022-05-10 | 2022-07-08 | 中铁十四局集团有限公司 | Multifunctional ramp wide beam splicing construction equipment |
| CN114808705A (en) * | 2022-02-28 | 2022-07-29 | 中国五冶集团有限公司 | Prestress tension operation platform with protection facilities |
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| CN204249072U (en) * | 2014-11-28 | 2015-04-08 | 中国建筑第六工程局有限公司 | For stretch-draw and the baffle plate integrating device of precast beam stretch-draw |
| CN205369044U (en) * | 2016-01-13 | 2016-07-06 | 浙江大学城市学院 | Integration prestressing force stretch -draw frame construction |
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| CN201873949U (en) * | 2010-11-11 | 2011-06-22 | 中铁十三局集团电务工程有限公司 | Bride prestress stretch-draw trolley |
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| CN202090291U (en) * | 2011-05-20 | 2011-12-28 | 中国十九冶集团有限公司 | Tensioning support |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489104A (en) * | 2017-08-31 | 2017-12-19 | 浙江工业大学 | A kind of girder pre-stressed steel Shu Zhangla protectors of T |
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| CN114808705A (en) * | 2022-02-28 | 2022-07-29 | 中国五冶集团有限公司 | Prestress tension operation platform with protection facilities |
| CN114717981A (en) * | 2022-05-10 | 2022-07-08 | 中铁十四局集团有限公司 | Multifunctional ramp wide beam splicing construction equipment |
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| Publication number | Publication date |
|---|---|
| CN105484165B (en) | 2017-03-22 |
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