CN204875542U - Anti - loading pre -compaction device that draws of no. 0 piece beiLei beam support jack of continuous beam - Google Patents
Anti - loading pre -compaction device that draws of no. 0 piece beiLei beam support jack of continuous beam Download PDFInfo
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- CN204875542U CN204875542U CN201520605145.4U CN201520605145U CN204875542U CN 204875542 U CN204875542 U CN 204875542U CN 201520605145 U CN201520605145 U CN 201520605145U CN 204875542 U CN204875542 U CN 204875542U
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Abstract
The utility model discloses an anti - loading pre -compaction device that draws of no. 0 piece beiLei beam support jack of continuous beam belongs to the bridge construction practice field, including last anchor system and the system of casting anchor to and connection steel strand wires between them, it includes the jack system to go up the anchor system to and arrange in the support top and support the last anchor system distribution roof beam of jack system, the system of casting anchor is including arranging in the cushion cap, and big or small mileage symmetrical arrangement's finish rolling screw -thread steel, and connects the system of the casting anchor distribution roof beam of finish rolling screw -thread steel, steel strand wires are connected and are contained jack, steel strand wires and the finish rolling screw -thread steel. The utility model discloses support squeeze time be can shorten greatly, construction cost and safe risk are reduced.
Description
Technical field
The utility model belongs to technical field of bridge construction, relates to No.0 of continuous beam multilayer Bailey beam pre-pressing bracket.
Background technology
Cantilever pouring prestressed reinforced concrete continuous beam always arranges No. 0 sections in main pier top, and No. 0 sections all exists a cantilever segment relative to pier shaft usually, and therefore needing provides falsework to cantilever segment.Support mode has following three kinds usually: raft support method, beam-column type bracket method, pier bracket method, no matter adopt which kind of rack construction mode, all must carry out precompressed to support bracket, carry out test bracket system and whether meet construction requirement, jack reverse drawing loads precompressed and is applicable to beam-column type bracket and pier bracket cribbing two kinds of support modes.
In existing bridge construction, pre-pressing bracket generally adopts the form of piling prepressing to carry out, heap carrier material generally selects sandbag, steel, the pre-briquetting of concrete etc., during construction, on-the-spot place, hanging device, material are prepared there is harsher requirement, and long construction period, expense is also relatively high, and need personnel to operate above support during precompressed simultaneously, security risk is large.
Utility model content
The purpose of this utility model is: propose a kind of No.0 of continuous beam Bailey beam bracket jack reverse drawing and load prepressing device, shorten the pre-pressing bracket time, reduce construction cost and security risk.
The purpose of this utility model is realized by following technical proposals:
A kind of No.0 of continuous beam Bailey beam bracket jack reverse drawing loads prepressing device, comprise anchor system and system of casting anchor, and the steel strand both connecting, described upper anchor system comprises jack system, and be arranged in support top and support the upper anchor system distribution beam of described jack system, the described system of casting anchor comprises and is arranged in cushion cap, and the fining twisted steel that size mileage is arranged symmetrically with, and connecting system of the casting anchor distribution beam of described fining twisted steel, described steel strand connect and comprise described jack and described fining twisted steel.
As selection, described upper anchor system distribution beam comprises the upper strata Two bors d's oeuveres i iron at lower floor's i iron and top, described lower floor i iron comprises vertical bridge to the parallel some i iron being evenly arranged in Bailey beam top, above the vertical boom that layout points is positioned at Bailey beam or diagonal brace, described upper strata Two bors d's oeuveres i iron vertical lower floor i iron is arranged in stretch-draw place, described jack system is fixed on Two bors d's oeuveres i iron top, described upper strata, and lower floor's i iron of described jack system position is Two bors d's oeuveres i iron; Described system distribution beam of casting anchor is Two bors d's oeuveres i iron distribution beam, and system of casting anchor described in described steel strand pass through distribution beam is connected with described fining twisted steel.
As further selection, described lower floor i iron is I32b i iron, described upper strata Two bors d's oeuveres i iron is I40c Two bors d's oeuveres i iron, lower floor's stretch-draw place i iron is I32b Two bors d's oeuveres i iron, outside, upper and lower sides 3cm Plate Welding in all Two bors d's oeuveres i iron, jack system is firmly connected with described upper strata Two bors d's oeuveres i iron by backing plate, ground tackle, intermediate plate; Described fining twisted steel is Φ 32 fining twisted steel, described system distribution beam of casting anchor is I40c Two bors d's oeuveres i iron distribution beam, fining twisted steel is connected with described system distribution beam of casting anchor by finish rolling nut, and system of casting anchor described in described steel strand pass distribution beam, is firmly connected by backing plate, ground tackle.
Select further as another, described fining twisted steel pre-buried or boring plant 16, corresponding jack system arranges 8 fluid pressure type punching jack.
The main scheme of aforementioned the utility model and each further selection scheme thereof can independent assortment to form multiple scheme; be the utility model can adopt and claimed scheme: as the utility model; each selection can select any combination with other; those skilled in the art can understand there is multiple combination according to prior art and common practise after understanding the present invention program; be the claimed technical scheme of the utility model, do not do exhaustive at this.
Workflow of the present utility model: conventional piling prepressing requires comparatively smooth mechanical execution and preloading material place, along with the height of support, preloading material unit varies in weight to be needed to configure corresponding hanging device and material transport equipment, it is special after bridge pier height is more than 30m, just large tonnage crane must be adopted, every upper level load needs the time of consumption very long, and increase along with the working load increase of bridge, operating expenses is also relatively high, personnel are needed to operate above support during precompressed simultaneously, security risk is large, this patent is by prestressed strand and fining twisted steel, anchor system on support is connected for a whole set of pre-pressing system with the system of casting anchor in cushion cap, by the jack system of multiple stage jack, evenly, synchronous at upper anchor system place tension steel strand, by steel strand and fining twisted steel, active force is passed on cushion cap, while stretch-draw, jack gives distribution beam a reaction force, distribution beam has passed to power on support more equably, thus support just reaches the object of precompressed, whole work progress material requested and the machinery simple cycle commonly used and substantially reduce construction, reduce construction cost and security risk.
The beneficial effects of the utility model:
1, squeeze time is short: adopt that reverse drawing precompressed carrys out the resistance to overturning of Bracket for Inspection, bearing capacity is a kind of practical, effective construction equipment, the construction of this device is simple, workable, efficiency is high, compared with traditional piling prepressing, whole squeeze time is mainly on the static load time, and the time shared by tension operation is very short, has saved the pre-pressing bracket time to greatest extent.
2, goods and materials, plant equipment, human input is few: traditional piling prepressing is because the weight (Unit Weight is generally more than 2.5t) of heap carrier material, the mobile crane of more than 25t is at least needed to install, along with the increase of pier stud height, equipment requirement is higher, need a large amount of vehicles to carry out the turnover of prepressing materials simultaneously, a precompressed at least obtains 15 people the above persons and operates, and install, only need pillar crane just can meet construction requirement as hanging device during pre-pressing system assembling, precompressed only needs 8 400t fluid pressure type punching jack, 8 ZB6-600 high-pressure oil pumps, 8 bundle 12-15.4mm steel strand are as the power transmission bundle of upper anchor system with system of casting anchor, only need 4 to execute pump personnel operation during precompressed and 4 patrol and guard personnel, save material greatly, reduce labour intensity.
3, construction safety risk is little: compare with the precompressed of pile loading in the past, adopt the construction of precompressed reverse drawing more flexible, controllability is extremely strong, according to the deformation of support, upper anchor system, system of casting anchor, timely information feed back is executed pump personnel to Dun Ding, can real-time load and the speed of controlled loading.During construction, All Jobs personnel and technician need not stand on support, execute pump personnel all in Dun Ding operation, and the personnel that make an inspection tour up and down are in safety zone.So security risk is greatly reduced.
4, material can recycle: after reverse drawing precompressed has been constructed, steel strand, distribution beam all repeatedly can have enough to meet the need use, general building site only need process the requirement that two cover bracket distribution beam can meet construction speed, can mutually call between different operating face, and tensioning equipment is the necessary equipment of bridge construction, do not need separately because buy, distribution beam can also be used in the construction of bridge main body simultaneously.
5, affect less by meteorological, territorial environment: this engineering method does not need to carry out leveling sclerosis to place, only need on the cushion cap of having constructed pre-buried or implantation fining twisted steel.Rain, night all can operate.
Accompanying drawing explanation
Fig. 1 is the pre-buried layout schematic diagram of the pre-buried fining twisted steel of cushion cap back-pressure of the utility model embodiment;
Fig. 2 be the utility model embodiment 0# block support back-pressure on anchor system layout schematic diagram;
Fig. 3 is that schematic diagram is arranged in the 0# block support back-pressure of the utility model embodiment system front of casting anchor;
Fig. 4 is that the 0# block support back-pressure of the utility model embodiment is casted anchor system side arrangement schematic diagram;
In figure, 1 is lower cushion cap, and 2 is upper cushion cap, 3 is pier stud, 4 is lower Layer assignment i iron, and 5 is upper strata Two bors d's oeuveres i iron, and 6 is lower floor's reinforcement Two bors d's oeuveres i iron, 7 is steel strand, 8 is jack system, and 9 is fining twisted steel, and 10 is Two bors d's oeuveres i iron distribution beam, 11 is finish rolling nut, and 12 is first floor Bailey beam support under bed die.
Detailed description of the invention
Shown in 4, below in conjunction with specific embodiments and the drawings, the utility model is further described.
1, upper anchor system: upper anchor system is by I32b i iron, I40c Two bors d's oeuveres i iron and jack system combine, specific practice is as follows: after support has been checked and accepted, vertical for I32b i iron (lower Layer assignment i iron 4) bridge is evenly arranged in Bailey beam top to the spacing by 0.9m (also can be encrypted according to load situation), above the vertical boom (i iron) that layout points falls within Bailey bracket or diagonal brace, local compression bends to avoid Bailey bracket upper chord to occur, again I40c Two bors d's oeuveres i iron (upper strata Two bors d's oeuveres i iron 5) is placed on above I32b i iron, drop point and jack tension position coincide, below jack tension position (jack system 8) I40c Two bors d's oeuveres i iron, add I32b Two bors d's oeuveres i iron (lower floor strengthens Two bors d's oeuveres i iron 6) simultaneously, local compression bends to avoid I40c Two bors d's oeuveres i iron to occur, outside in all Two bors d's oeuveres i iron, upper and lower sides 3cm Plate Welding, to increase the tensile strength of coupled beam, finally jack is placed in above I40c Two bors d's oeuveres i iron, pass through backing plate, ground tackle, intermediate plate firmly connects.
2, to cast anchor system: system of casting anchor is primarily of pre-buried fining twisted steel (fining twisted steel 9) (containing nut-finish rolling nut 11), I40c Two bors d's oeuveres i iron distribution beam (Two bors d's oeuveres i iron distribution beam 10) and ground tackle, intermediate plate composition, and the effect of system of casting anchor is for the precompressed of steel strand reverse drawing provides a firm anchor point to anchor in Bailey bracket or bracket.Specific practice is as follows: first carry out anti-pulling test to pre-buried fining twisted steel, after the distribution beam installation in position processed after meeting the demands, by I40c Two bors d's oeuveres i iron, stretch-draw is carried out to fining twisted steel with jack again, after reaching the stretch-draw value of setting, with torque spanner, the finish rolling nut above Two bors d's oeuveres i iron is tightened, steel wire bundle, through ribbing Two bors d's oeuveres I40C i iron, is firmly connected by backing plate, ground tackle.
3, connected system: upper anchor system is connected by steel strand with the system of casting anchor.
4, construction sequence:
1., Φ 32 fining twisted steel is planted in pre-buried or boring;
2., anti-pulling test;
3., upper anchor system distribution beam processing and installation;
4. system of, casting anchor distribution beam processing and assembled;
5. system of, casting anchor distribution beam stretch-draw anchor;
6., steel wire, installation;
7., Bailey bracket support reverse drawing precompressed;
8., unload.
Wherein it is to be noted that
1, with Φ 32 fining twisted steel of cushion cap coupling part in system of casting anchor, preferably adopt pre-buried mode in advance to carry out, when meeting, the bar planting degree of depth must by calculating and meeting corresponding code requirement, and anti-pulling detection is carried out to it, guarantee that anti-pulling can meet the requirement of stretch-draw;
2, in reverse drawing system, the radical of steel strand will mate mutually with between Φ 32 fining twisted steel radical and stretch-draw jack, all must consider enough safety factor;
3, the layout of stretch-draw point and quantity follow reasonable, balanced principle, and coincide with the stress system of support reality;
4, all must carry out pre-stretch-draw before the formal stretch-draw of all steel strand, ensure that every root steel strand are all in stress, and every stressed size of root steel strand is substantially identical;
5, before stretch-draw, jack, oil meter must be demarcated, and when condition is allowed, adopt intelligent tensioning to guarantee the synchronous of whole tensioning system and accuracy as far as possible.
Workflow of the present utility model:
1, Φ 32 fining twisted steel is planted in pre-buried or boring:
This step object is for providing an enough cushion cap anchored force to distribution beam of casting anchor during the precompressed of support reverse drawing.Checked from a large amount of construction experiences and science, PSB830 Φ 32 fining twisted steel has good tensile property, meets the requirement of construction tension completely.According to calculating pre-buried at size mileage or implanting the fining twisted steel of corresponding radical during enforcement, 16 Φ 32 fining twisted steels are adopted altogether in this engineering, when adopting bar planting, single fining twisted steel length is not less than 200cm, the degree of depth imbedding cushion cap is not less than 120cm, expose and be not less than 80cm, during boring, bit diameter adopts Φ 40mm, and bar planting must be carried out according to related specifications.
2, anti-pulling test:
The object of anti-pulling test is that can inspection finish rolling screw thread that is pre-buried or boring implantation provide enough cushion cap anchored force when pre-pressing bracket.When adopting bar planting mode, carrying out after 72 hours after anti-pulling test should be selected in bar planting, solidifying fully to enable glue.A cushion cap gets 2 finish rolling screw threads as subjects, each one of size mileage (for the purpose of insurance, also can all test).This experiment selects YCW80B-200 type jack to carry out, and experiment front reply jack carries out demarcation and can use.
3, the processing of upper anchor system distribution beam and installation:
In order to ensure that support can evenly pass to the reaction force of jack on Bailey beam or bracket when precompressed uniformly, along vertical bridge to paving I32b i iron in Bailey beam or bracket, repave two groups of I40c i iron Two bors d's oeuveres longerons, inside and outside upper anchor suspension centre, upper and lower sides welding 3cm steel plate, with the stressed property of the entirety increasing Two bors d's oeuveres binder.
The processing of system of 4, casting anchor distribution beam and assembled:
System of casting anchor is primarily of fining twisted steel (containing nut), distribution beam and ground tackle, intermediate plate composition, the effect of system of casting anchor is for the precompressed of steel strand reverse drawing provides a firm anchor point to anchor in Bailey bracket or bracket, by reverse drawing, power is passed in distribution beam, again power is passed on finish rolling screw thread simultaneously, be also just converted into the anchored force between finish rolling screw thread and cushion cap.What system assignment of casting anchor beam adopted is I40 i iron Two bors d's oeuveres stiff girder, and length is 200cm.Add man-hour every Pin coupled beam 1cm steel plate to connect, outside, upper and lower sides 3cm Plate Welding in suspension centre under coupled beam steel strand, to increase the tensile strength of coupled beam.During welding, full, the weld length thickness of weld seam all meets the demands.
5, system of casting anchor distribution beam stretch-draw anchor:
After the distribution beam installation in position processed, by I40c Two bors d's oeuveres i iron, stretch-draw is carried out to fining twisted steel with jack again, after reaching the stretch-draw value of setting, with torque spanner, the finish rolling nut above Two bors d's oeuveres i iron is tightened, steel wire bundle, through ribbing Two bors d's oeuveres I40C i iron, is firmly connected by backing plate, ground tackle.The reverse drawing precompressed of system of casting anchor like this with regard to there being enough stress to draw in line carrier.The calculating of concrete tension stress is carried out with reference to related specifications.Adopt the stretch-draw of 80t hydraulic jack, need before stretch-draw to demarcate jack, oil meter.
6, steel wire, installation:
(1), in reverse drawing pre-pressing system, adopt totally 8 bundles, each 4 bundles of size mileage, often restraint by 12 φ 15.24 (quantity is mated substantially with 2 finish rolling screw threads), nominal diameter is 140mm2, the steel strand composition of ultimate tensile strength 1860Mpa, because steel strand need to recycle, the tensile strength of steel strand controls according to 1860Mpa.Steel wire bundle, through ribbing Two bors d's oeuveres I40C i iron, is firmly connected by backing plate, ground tackle.
(2), after steel strand march into the arena, need with batch censorship, after the assay was approved, can come into operation, before blanking, notify that quality inspection engineer and management check steel strand by supervising engineer, whether surface has corrosion, whether has the phenomenon of fracture of wire.Strictly cutting length is controlled during blanking.
1. go up anchor system I32b Two bors d's oeuveres binder and cast anchor system Two bors d's oeuveres binder distance L1;
2. jack, limiting plate, ground tackle pattern length L2;
3. length in reserve L3, in order to unloading that can be safe, length in reserve must not be less than 80cm;
The then cutting length of steel strand: L=L1+L2+L3
(3), steel wire time, should select to carry out near bridge pier, be convenient to utilize pillar crane to lift, neat and tidy is answered in blanking place, must not have mud ponding, in order to avoid steel strand are besmirched dye, corrosion steel strand.12 steel strand are a branch of, and should align in every intrafascicular steel strand termination, must not have loose head phenomenon.Adopt mobile crane or tower crane to coordinate during installation to install, on steel strand pass after anchor suspension centre anchor hole, check the protruded length of steel bundle.Put work anchor, and use intermediate plate anchoring.
7, Bailey bracket support reverse drawing precompressed:
(1), load classification
0％→20％→40％→60％→80％→90％→100％→110％→120％
Wherein, the tensile load of separate unit jack is:
0％→20％→40％→60％→80％→90％→100％→100％→110％
(2) lotus time controling, is held
When load is loaded on each rank, must has and hold the lotus time accordingly, every grade of loaded is after one hour, and technician measures vertical deformation value.It is as follows specifically to hold the lotus time:
Hierarchical loading → often increases one-level load loaded and need hold the lotus time and hold the lotus time when being not less than 2 hours → being loaded on 100% load and be no less than 12 hours → be loaded on nominal load 110% 24 hours → off-load step by step of holding lotus
(3) deformation of timbering is measured
For grasping the non-resilient and elastic deformation situation of bracket, providing foundation for 0# block construction mould absolute altitude calculates, the plan-position of bracket and elevation need be measured loading in interval time.
8, unload:
Unloading should unload step by step, should select in the unloading of upper anchor system place, safer like this, should unload step by step during unloading, size mileage, left and right should be symmetrical, often unloaded one-level, carry out level measurement, pumper and operating personnel can not stand on bracket when operating, and should be on bridge pier and operate, and hurt sb.'s feelings in case intermediate plate ejects.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a No.0 of continuous beam Bailey beam bracket jack reverse drawing loads prepressing device, it is characterized in that: comprise anchor system and system of casting anchor, and the steel strand both connecting, described upper anchor system comprises jack system, and to be arranged on support and to support the upper anchor system distribution beam of described jack system, the described system of casting anchor comprises and is arranged in cushion cap, and the fining twisted steel that size mileage is arranged symmetrically with, and connecting system of the casting anchor distribution beam of described fining twisted steel, described steel strand connect and comprise described jack and described fining twisted steel.
2. No.0 of continuous beam Bailey beam bracket jack reverse drawing as claimed in claim 1 loads prepressing device, it is characterized in that: described upper anchor system distribution beam comprises lower floor's i iron and upper strata, top Two bors d's oeuveres i iron thereof, described lower floor i iron comprises vertical bridge to the parallel some i iron being evenly arranged in Bailey beam top, above the vertical boom that layout points is positioned at Bailey beam or diagonal brace, described upper strata Two bors d's oeuveres i iron vertical lower floor i iron is arranged in stretch-draw place, described jack system is fixed on Two bors d's oeuveres i iron top, described upper strata, lower floor's i iron of described jack system position is Two bors d's oeuveres i iron, described system distribution beam of casting anchor is Two bors d's oeuveres i iron distribution beam, and system of casting anchor described in described steel strand pass through distribution beam is connected with described fining twisted steel.
3. No.0 of continuous beam Bailey beam bracket jack reverse drawing as claimed in claim 2 loads prepressing device, it is characterized in that: described lower floor i iron is I32b i iron, described upper strata Two bors d's oeuveres i iron is I40c Two bors d's oeuveres i iron, lower floor's stretch-draw place i iron is Two bors d's oeuveres I32b i iron, outside, upper and lower sides 3cm Plate Welding in all Two bors d's oeuveres i iron, jack system is firmly connected with described upper strata Two bors d's oeuveres i iron by backing plate, ground tackle, intermediate plate; Described fining twisted steel is Φ 32 fining twisted steel, described system distribution beam of casting anchor is I40c Two bors d's oeuveres i iron distribution beam, fining twisted steel is connected with described system distribution beam of casting anchor by finish rolling nut, and system of casting anchor described in described steel strand pass distribution beam, is firmly connected by backing plate, ground tackle.
4. No.0 of continuous beam Bailey beam bracket jack reverse drawing as claimed in claim 3 loads prepressing device, it is characterized in that: the pre-buried or boring of described fining twisted steel plants 16, and corresponding jack system arranges 8 fluid pressure type punching jack.
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|---|---|---|---|
| CN201520605145.4U CN204875542U (en) | 2015-08-12 | 2015-08-12 | Anti - loading pre -compaction device that draws of no. 0 piece beiLei beam support jack of continuous beam |
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| CN201520605145.4U CN204875542U (en) | 2015-08-12 | 2015-08-12 | Anti - loading pre -compaction device that draws of no. 0 piece beiLei beam support jack of continuous beam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106702906A (en) * | 2016-12-09 | 2017-05-24 | 中铁八局集团昆明铁路建设有限公司 | Pre-pressing device for hanging baskets and pre-pressing method thereof |
| CN108827683A (en) * | 2018-07-20 | 2018-11-16 | 中国水利水电第七工程局有限公司 | A kind of bridge bracket reverse drawing precompressed mechanism and its pre- pressure detection method |
| CN113235442A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | From novel assembled 0# piece construction bracket of taking pre-compaction subassembly |
| CN113235443A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | Pre-pressing construction method of assembly type 0# block construction bracket |
| CN113737653A (en) * | 2021-08-11 | 2021-12-03 | 广东水电二局股份有限公司 | Prepressing device of bearing support and using method thereof |
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2015
- 2015-08-12 CN CN201520605145.4U patent/CN204875542U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702906A (en) * | 2016-12-09 | 2017-05-24 | 中铁八局集团昆明铁路建设有限公司 | Pre-pressing device for hanging baskets and pre-pressing method thereof |
| CN108827683A (en) * | 2018-07-20 | 2018-11-16 | 中国水利水电第七工程局有限公司 | A kind of bridge bracket reverse drawing precompressed mechanism and its pre- pressure detection method |
| CN113235442A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | From novel assembled 0# piece construction bracket of taking pre-compaction subassembly |
| CN113235443A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | Pre-pressing construction method of assembly type 0# block construction bracket |
| CN113235442B (en) * | 2021-05-20 | 2022-05-31 | 广西路桥工程集团有限公司 | From novel assembled 0# piece construction bracket of taking pre-compaction subassembly |
| CN113235443B (en) * | 2021-05-20 | 2022-05-31 | 广西路桥工程集团有限公司 | Pre-pressing construction method of assembly type 0# block construction bracket |
| CN113737653A (en) * | 2021-08-11 | 2021-12-03 | 广东水电二局股份有限公司 | Prepressing device of bearing support and using method thereof |
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