CN101736699B - Accurate positioning method of sliding of full-support frame steel box girder - Google Patents
Accurate positioning method of sliding of full-support frame steel box girder Download PDFInfo
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- CN101736699B CN101736699B CN 200910259820 CN200910259820A CN101736699B CN 101736699 B CN101736699 B CN 101736699B CN 200910259820 CN200910259820 CN 200910259820 CN 200910259820 A CN200910259820 A CN 200910259820A CN 101736699 B CN101736699 B CN 101736699B
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Abstract
The invention relates to an accurate positioning method of the sliding of a full-support frame steel box girder, comprising the following steps of: firstly setting up a steel box girder installation full-support frame, wherein the upper part of the full-support frame is provided with a sliding chute, and a shifter is placed on the sliding chute; then placing the steel box girder on the shifter of the full-support frame by a large-sized floating crane, and towing the steel box girder to longitudinally move to a specified position along the sliding chute; horizontally pushing the shifter by a jack so that the steel box girder horizontally moves to a set position; and finally vertically regulating the steel box girder by the jack so that the accurate positioning and installation of the steel box girder is realized.
Description
Technical field
The present invention relates to a kind of cable stayed bridge steel case beam mounting method, particularly a kind of sliding of full-support frame steel box girder accurate positioning method.
Background technology
Large span Cable Stayed Steel structure box-type bridge is to be installed by a plurality of steel case beams to be welded.Accurate positioning difficulty when steel case beam is installed is very big, and especially structural internal force, absolute altitude, the beam length of steel case beam under temperature difference influence constantly changes, and more added disadvantageous condition to installation.At present, the common method of the installation of steel case beam has the lifting of bridge floor loop wheel machine cantilever, incremental launching method, full support crane barge lift-on/lift-off system etc.; Install for end bay steel case beam, because situation, the method location and installation that then will adopt long-armed cantilever crane, the lifting of half support crane barge to combine usually such as complicated topographical conditions, waters be more shallow with the bridge floor loop wheel machine.Above-mentioned mounting method is complex procedures in concrete installation, realizes that accurate positioning difficulty is big, is difficult to guarantee construction quality, and needs equipment many that efficiency of construction is low, often causes delaying the duration.
Summary of the invention
Technical problem to be solved by this invention is, at the above-mentioned deficiency of existing mounting method, and provides a kind of operation simple, the easy to operate accurate locating mounting method of steel case beam, and can reduction of erection time, minimizing fund and equipment input.
Method provided by the present invention is realized by following technical scheme:
The sliding of full-support frame steel box girder accurate positioning method is characterized in that may further comprise the steps:
(1) set up steel case beam full support is installed: described full support adopts steel pipe pile as the basis, is bound up by flat connection, diagonal brace with connecting steel pipe between the steel pipe pile, forms the structure that the frame type cross section combines with the truss-like longitudinal section; The steel pipe pile top is provided with horizontal spandrel girder, laterally establish vertical spandrel girder on the spandrel girder, vertically on the spandrel girder transverse distribution beam is set, establish vertical distribution beam on the transverse distribution beam, vertically establish the load distribution steel plate on the distribution beam, establish chute on the load distribution steel plate, place shift unit on the chute, the axis of described shift unit and the misalignment of axe of described chute are no more than 2mm, and setting prevents that shift unit from departing from the stop of chute axis on shift unit;
(2) hang steel case beam: adopt large-scale floating crane that steel case beam is hung on the shift unit of described full support;
(3) vertically move steel case beam: the employing pulling equipment, makes shift unit slide and drive steel case beam along chute and moves longitudinally to assigned address to traction steel case beam along bridge;
(4) horizontal mobile steel case beam: the case back is risen with jack, the shift unit accent is turn 90 degrees, and then steel case beam fallen on the shift unit, distance according to steel case beam needs lateral adjustments, adopt the horizontal pushing tow shift unit of jack, make steel case beam traversing, and regulate the place that puts in place at shift unit and carry out spacing to desired location;
(5) vertical adjustment steel case beam: adopt the feed-through hydraulic jack that the case back is risen, take out shift unit, and adopt temporary support to prop up pad steel case beam, on temporary support, place steel plate the vertical absolute altitude of steel case beam is regulated.
The present invention adopts simple rack form, and the accurate location when realizing that by the slippage on support of steel case beam steel case beam is installed, and operation is simple, reduced the equipment input, but reduction of expenditure, the reduction of erection time, and can guarantee that construction quality meets the requirement of correlation technique standard.
Description of drawings
Fig. 1 is a sliding of full-support frame steel box girder accurate positioning method flow chart of the present invention.
Fig. 2 is the vertical structure figure of the full support that adopts of the present invention.
Fig. 3 is the cross-sectional view of full support.
Fig. 4 is full support superstructure schematic diagram.
Fig. 5 is the structural representation of the shift unit on the full support.
Fig. 6 is that steel case beam hangs the mode schematic diagram.
Fig. 7 is that steel case beam hangs the view on shift unit.
Fig. 8 is horizontal mobile steel case beam mode schematic diagram.
Fig. 9 is a mode schematic diagram of regulating steel case beam absolute altitude.
The specific embodiment
Fig. 1 is the flow chart of sliding of full-support frame steel box girder accurate positioning method of the present invention.Method of the present invention is to set up full support earlier before steel case beam is installed.Full support bottom is a support system, and top is sliding system, and sliding system is provided with shift unit.After full support is set up and finished, adopt large-scale floating crane that steel case beam is hung on the shift unit of support top sliding system,, adjust the lengthwise position of steel case beam by the longitudinal sliding motion of draw-gear steel case beam; Utilize the horizontal pushing tow shift unit of jack, regulate the lateral attitude of steel case beam; With the vertical pushing steel box girder of jack, regulate the absolute altitude of steel case beam then.By the adjustment of above-mentioned three directions, realize the accurate location of steel case beam.
The structure of full support such as Fig. 2, Fig. 3, Fig. 4, shown in Figure 5.Referring to Fig. 2, full support 1 adopts steel pipe pile 11 as the basis, is bound up by flat connection, diagonal brace with connecting steel pipe 12 between the steel pipe pile 11, forms the structure that the frame type cross section combines with the truss-like longitudinal section.
See Fig. 3, steel pipe pile 11 tops are provided with horizontal spandrel girder 13, laterally below the span centre of spandrel girder 13 steel pipe are set and support as the Eight characters.Laterally establish vertical spandrel girder 14 on the spandrel girder, vertically spandrel girder 14 adopts four limbs to strengthen the chord member Bailey truss.
See Fig. 4, vertically on the spandrel girder 14 transverse distribution beam 15 is set, establish vertical distribution beam 16 on the transverse distribution beam 15, adopt U-bolts to fix between the Bailey truss 14 of described transverse distribution beam 15 and the vertical spandrel girder of conduct, adopt to weld between described transverse distribution beam 15 and the vertical distribution beam 16 and fix.Vertically establish load distribution steel plate 17 on the distribution beam 16, establish chute 18 on the load distribution steel plate 17, place shift unit 19 on the chute 18.Shift unit 19 is provided with roller, can slide along chute 18.
See Fig. 5, described shift unit 19 is placed on the chute 18, and the misalignment of axe of the axis of shift unit 19 and described chute 18 is no more than 2mm, and setting prevents that shift unit from departing from the stop 20 of chute axis on shift unit 19.
Fig. 6 utilizes full support to carry out steel case beam to hang the mode schematic diagram.After full support is set up and finished, adopt large-scale floating crane 21 that steel case beam 22 is hung on the shift unit 19 of described full support.Steel case beam 22 was placed on the shift unit 19 o'clock, shift unit 19 should be supported in the vertical web 221 of steel case beam 22 and the node location of diaphragm 222, saw Fig. 7.
Then, to traction steel case beam, because the frictional force effect, shift unit slides and drives steel case beam along chute and moves longitudinally to assigned address the employing pulling equipment along bridge; Described pulling equipment can adopt Chain block traction or hoist engine.
Referring to Fig. 8, positioning requirements according to steel case beam 22, horizontal if desired mobile steel case beam 22, then with hydraulic jack with case beam 22 jack-up, shift unit 19 is turned 90 °, and then steel case beam is fallen on the shift unit, distance according to steel case beam needs lateral adjustments, adopt jack 23 horizontal pushing tow shift units 19, make steel case beam traversing, and regulate the place that puts in place at shift unit and carry out spacing to assigned address.
Referring to Fig. 9, after finish steel case beam vertical and horizontal location, vertical adjustment steel case beam if desired, can adopt the feed-through hydraulic jack with case beam 22 jack-up, take out shift unit, and adopt 24 pads of temporary support steel case beam, on temporary support, place the vertical absolute altitude of 25 pairs of steel casees of steel plate beam 22 and regulate.
The present invention by the adjustment to vertical, horizontal, vertical three directions of steel case beam, has just finished the accurate location to steel case beam by above-mentioned steps.
Below by specific embodiment method of the present invention is elaborated again.
Certain bridge is only post leaning tower space pinch plane dorsal funciculus hybrid beam cable stayed bridge, pier, tower, beam consolidation, strides the footpath and forms 109+188+88m; Stride the footpath 109m be concrete box girder, stride the footpath 188+88m be steel case beam, bridge longitudinal gradient 1.603%.Stride between 88m two bridge piers of footpath totally eight on steel case beam, by No. 15～No. 22 sections of steel case beam, its width is 44m, highly is 3.5m, the type of its concrete sections and weight such as table 1, and gross weight is about 2275 tons.
Table 1: steel case beam parameter list
| The |
15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| The beam segment type | D | C | B | B | E | E | E | F |
| Beam segment length (m) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 8.97 |
| Beam section weight (t) | 330 | 302 | 288 | 288 | 274 | 274 | 274 | 245 |
According to the rigid joint position of the weight of each sections of steel case beam, steel case beam, orographic condition, geological condition, lifting mode etc., lift the design and construction of full support.
The lower bracket of full support partly adopts φ 630 * 7mm steel pipe as basic steel pipe pile, is bound up by flat connection, diagonal brace between the steel pipe pile, and flat connection, diagonal brace adopt φ 273 * 6mm steel pipe.Integral support is the frame type cross section and the combining of truss-like longitudinal section.Position, steel pipe pile top adopts 2H450 * 200 as the load-bearing crossbeam, strides the footpath and gets 5.0m, 5.3m according to the bridge type layout, and φ 273 * 6mm steel pipe is set supports as the Eight characters in load-bearing crossbeam span centre (for channel-section steel chute position of center line) below.
Vertically spandrel girder adopts four limbs to strengthen the chord member Bailey truss, chute adopts [40 channel-section steels, be designed to the vertical distribution beam of I28a transverse distribution beam and I12.6 between chute and the Bailey truss, vertically distribution beam is with [steel plate of employing δ 30mm thickness distributes power transmission as load between 40 channel-section steels.
The job practices of setting up full support is as follows:
Make the stake position accurately by the control point, operation at sea utilizes the cantilever guiding trestle on the crane barge, locatees by the anchor adjustment of drawing of buoyancy tank, determines the stake position;
Accurately make steel pipe pile stake position, adjust the cantilever guiding trestle with crawler crane, the fixed guide support on buoyancy tank, repetition measurement stake position;
The place reinforces at the steel pipe pile head, lift steel pipe pile then and enter guiding trestle, after the steel pipe pile verticality meets the demands, start the pile monkey that shakes shake heavy, shake heavy with steel pipe pile no longer sink and fall with basement rock on be standard, adopt in the heavy process of shaking and on steel pipe pile, mark, carry out pile extension then to the support Design absolute altitude to observe steel pipe pile sinking situation;
After pile extension is finished, carry out diagonal brace, flat connection welded and installed, and the installation of stake top spandrel girder, Eight characters support and support bottom lateral bracing;
Every group shake pile driving construction and spandrel girder installation after, on the load-bearing crossbeam, emit the axial location and the absolute altitude record of chute;
According to the chute axis of measuring setting-out, on spandrel girder, carry out the installation site unwrapping wire of four limbs Bailey truss spandrel girder, and it is one-sided that the Bailey truss diagonal brace is installed, as the support of the location of Bailey truss;
Bailey truss is segmented to be lifted on the spandrel girder, and then bridge is finished the installation of Bailey truss, will note the location of diagonal brace in the construction, with the axis that guarantees Bailey truss in consistent with the chute axis;
Determine in length and breadth to the position of distribution beam, chute transverse distribution beam be installed, and and Bailey truss between adopt U-bolts to fix, the vertical distribution beam of chute is installed then, and will laterally, will vertically adopt welding to fix between the distribution beam;
Setting-out goes out the axis of chute on vertical distribution beam, carries out the installation of chute then, and carries out the segment processing of chute jack position;
The setting-out tapping case beam plane of frame that falls in chute, and shift unit is laid on the chute, and carry out spacingly, the axis off normal of its axis of shift unit installation requirement and chute is no more than 2mm.
After full support is set up and is finished, the lifting of beginning steel case beam.Large-scale floating crane is adopted in the lifting of steel case beam.The large-scale floating crane location of casting anchor must be according to the anchored force of definite anchors such as the depth in hoisting weight, lifting waters.Transport the beam ship positionning then and cast anchor, carry out the installation and the wind resistance hawser of hoist cable.
The support height requirement is satisfied in the lifting of steel case beam, tightens up anchor line then and puts close to the chord position that falls of steel case beam.
Steel case beam is when support height is 50cm, the plan-position of observation steel case beam is also adjusted, the face position deviation transfers to minimum up to steel case Liangping, continues to transfer steel case beam then on the shift unit of full support, and shift unit is supported on the node location of vertical web of steel case beam and diaphragm.
Steel case beam falls behind the frame, utilizes draw-gear traction carrying out length travel.Draw-gear comprises 2 10 tons of Chain blocks, wire rope, 10 tons of shackles etc., checks the level of tightness of wire rope, after clearly all wire rope all are in straight state (initial stressed unanimity), draws 2 Chain blocks simultaneously, beginning steel case beam straight skidding.
Steel case beam straight skidding is behind the given plane position, and according to the plan-position of steel case beam direction across bridge, whether decision carries out steel case beam lateral adjustments.Cross-bridges control method: the case back is risen with jack, the shift unit accent is turn 90 degrees, and then the oil pump oil return falls to beam on the shift unit, distance according to measurement result needs lateral adjustments, regulating the place that puts in place at shift unit then carries out spacing, adopt two 32 tons of jack to carry out the pushing tow shift unit, reach the effect of traversing steel case beam.
After the steel box girder sliding was in place, as required, employing feed-through hydraulic jack played steel case back, takes out shift unit, and adopted temporary support to prop up pad steel case beam, places steel plate and regulate the purpose that absolute altitude reaches vertical absolute altitude adjusting on temporary support.
Claims (8)
1. sliding of full-support frame steel box girder accurate positioning method is characterized in that may further comprise the steps:
(1) set up steel case beam full support is installed: described full support adopts steel pipe pile as the basis, is bound up by flat connection, diagonal brace with connecting steel pipe between the steel pipe pile, forms the structure that the frame type cross section combines with the truss-like longitudinal section; The steel pipe pile top is provided with horizontal spandrel girder, laterally establish vertical spandrel girder on the spandrel girder, vertically on the spandrel girder transverse distribution beam is set, establish vertical distribution beam on the transverse distribution beam, vertically establish the load distribution steel plate on the distribution beam, establish chute on the load distribution steel plate, place shift unit on the chute, the axis of described shift unit and the misalignment of axe of described chute are no more than 2mm, and setting prevents that shift unit from departing from the stop of chute axis on shift unit;
(2) hang steel case beam: adopt large-scale floating crane that steel case beam is hung on the shift unit on described full support top;
(3) vertically move steel case beam: the employing pulling equipment, makes shift unit slide and drive steel case beam along chute and moves longitudinally to assigned address to traction steel case beam along bridge;
(4) horizontal mobile steel case beam: the case back is risen with jack, the shift unit accent is turn 90 degrees, and then steel case beam fallen on the shift unit, distance according to steel case beam needs lateral adjustments, adopt the horizontal pushing tow shift unit of jack, make steel case beam traversing, and regulate the place that puts in place at shift unit and carry out spacing to desired location;
(5) vertical adjustment steel case beam: adopt the feed-through hydraulic jack that the case back is risen, take out shift unit, and adopt temporary support to prop up pad steel case beam, on temporary support, place steel plate the vertical absolute altitude of steel case beam is regulated.
2. according to the described sliding of full-support frame steel box girder accurate positioning method of claim 1, it is characterized in that: the full support described in the step (1) is set up, it is heavy at first to adopt the pile monkey that shakes that steel pipe pile is shaken, no longer sinking and fall within on the basement rock with steel pipe pile is standard, and with the steel pipe pile pile extension to the support Design absolute altitude.
3. according to the described sliding of full-support frame steel box girder accurate positioning method of claim 1, it is characterized in that: the span centre below of described horizontal spandrel girder is provided with steel pipe and supports as the Eight characters.
4. according to the described sliding of full-support frame steel box girder accurate positioning method of claim 1, it is characterized in that: described vertical spandrel girder adopts four limbs to strengthen the chord member Bailey truss.
5. according to the described sliding of full-support frame steel box girder accurate positioning method of claim 4, it is characterized in that: adopt U-bolts to fix between described transverse distribution beam and the described Bailey truss, adopt welding to fix between described transverse distribution beam and the vertical distribution beam.
6. according to the described sliding of full-support frame steel box girder accurate positioning method of claim 1, it is characterized in that: described chute adopts [40 channel-section steels.
7. according to the described sliding of full-support frame steel box girder accurate positioning method of claim 1, it is characterized in that: when described steel case beam was placed on the shift unit, described shift unit was supported in the node location of vertical web of steel case beam and diaphragm.
8. according to the described sliding of full-support frame steel box girder accurate positioning method of claim 1, it is characterized in that: described pulling equipment is Chain block traction or hoist engine.
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Owner name: CCCC ROAD AND BRIDGE CONSTRUCTION CO., LTD. Free format text: FORMER OWNER: ROAD + BRIDGE GROUP INTERNATIONAL CONSTRUCTION CO., LTD. Effective date: 20120711 |
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Effective date of registration: 20120711 Address after: 101100 auspicious garden 19, Beijing, Tongzhou District Co-patentee after: Road & Bridge International Co., Ltd. Patentee after: China Communications Road and Bridge North China Engineering Co., Ltd. Address before: 101100 auspicious garden 19, Beijing, Tongzhou District Co-patentee before: CRBC International Co., Ltd. Patentee before: China Communications Road and Bridge North China Engineering Co., Ltd. |