CN210368672U - Back cable type bridge girder erection machine for two-span continuous construction of combined beam - Google Patents
Back cable type bridge girder erection machine for two-span continuous construction of combined beam Download PDFInfo
- Publication number
- CN210368672U CN210368672U CN201921222763.5U CN201921222763U CN210368672U CN 210368672 U CN210368672 U CN 210368672U CN 201921222763 U CN201921222763 U CN 201921222763U CN 210368672 U CN210368672 U CN 210368672U
- Authority
- CN
- China
- Prior art keywords
- supporting
- girder erection
- bridge
- bridge girder
- supporting leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a back cable type bridge girder erection machine for two-span continuous fabrication of a composite beam, which comprises a bridge girder erection machine body, wherein a front supporting leg, a middle supporting leg and a rear supporting leg are arranged on a supporting beam of the bridge girder erection machine body, the length of the supporting beam outside the front supporting leg is 0.2-0.3 times of the length of a single-span steel beam, the middle supporting leg is two pairs of telescopic supporting legs arranged in a sliding manner along the longitudinal bridge direction, a steel tower is arranged on the supporting beam back ridge corresponding to the position of the middle supporting leg, and the steel tower is connected with the supporting beam through a plurality of stay cables; the supporting cross beam is provided with a sliding hoisting device moving along the bridge direction, the supporting cross beam is also provided with a plurality of groups of lifting sling devices arranged at intervals along the bridge length direction, and a beam transporting vehicle is arranged below the supporting cross beam. The utility model discloses simple structure, convenient to use through add the extension section at the bridge girder erection machine afterbody, has promoted the hoist and mount distance of equipment, has adapted to two and has striden the demand of continuously erectting and pour.
Description
Technical Field
The utility model belongs to the technical field of the lifting device technique of reinforced concrete composite beam and specifically relates to a back of body cable formula bridging machine that is used for two spans of composite beam to do even.
Background
The steel-concrete composite bridge has the advantages of light self weight, large spanning capability, quick construction progress and the like, and has very obvious economic benefit and competitiveness in traffic construction. At present, the construction of the steel-concrete composite beam bridge is greatly promoted in China, and the common construction methods include a support construction method, a pushing construction method and a bridge girder erection machine construction method. The construction speed of the bridge girder erection machine construction method is relatively high, the dead weight of the steel girder and the bridge deck at the early stage is borne by the steel girder, the bridge deck is not stressed, the integral stress of the combined structure is generated when the later stage load acts, and the comprehensive advantages are very obvious. However, when the existing bridge girder erection machine is used for hoisting construction, only one span of steel girder is hoisted each time, then a bridge deck is installed, and a wet joint part of the bridge deck is poured, namely, a hole-by-hole construction method is adopted. After the steel beam of one span is erected every time, construction of the next span can be carried out after the pouring of the wet joint of the transverse bridge deck slab is required to be finished, and therefore the construction speed of the wet joint link of the bridge deck slab directly influences the construction progress of the whole project. Secondly, the steel-concrete composite beam mostly adopts an equal span arrangement mode, so that the side span is most unfavorable in stress, and the cracking of a pier top hogging moment area is prevented.
Disclosure of Invention
The utility model provides a back of body cable formula bridge girder erection machine that is used for two strides of composite beam to do even, aim at solve current bridge girder erection machine construction and have that equipment utilization is lower, construction speed is slow and girder steel and the unfavorable problem of side span atress.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
the utility model discloses a back cable formula frame bridge crane for two strides of composite beam are even done, including the frame bridge crane body, be provided with front leg, well landing leg and back landing leg on the supporting beam of frame bridge crane body, the supporting beam length in the front leg outside is 0.2-0.3 times of single-span girder steel length, well landing leg is two pairs of telescopic landing legs that slide to set up along the longitudinal bridge, is provided with the steel tower on the supporting beam back of the body corresponding with well landing leg position, the steel tower links to each other with the supporting beam through many suspension cables; the supporting cross beam is provided with a sliding hoisting device moving along the bridge direction, the supporting cross beam is also provided with a plurality of groups of lifting sling devices arranged at intervals along the bridge length direction, and a beam transporting vehicle is arranged below the supporting cross beam.
The height of the steel tower is 1/3 of the length of the single-span steel beam, and 4-6 stay cables are respectively arranged on two sides of the steel tower.
Every well landing leg top all is in through motor drive's vertical walking wheel and setting the slide rail of supporting beam bottom surface links to each other, and is provided with movable the knot of fastening between well landing leg and the supporting beam.
The sliding hoisting device comprises a movable cross beam, the top of the movable cross beam is provided with an electric rope collecting machine, the movable cross beam is connected with the supporting cross beam through a longitudinal guide rail, and a hoisting hook is arranged on a hoisting cross beam connected with the electric rope collecting machine.
Every it all includes the rolling machine to promote the hoist cable device, the rolling machine through the horizontal bridge to the pulley that sets up with supporting beam links to each other, and the hoist cable end of rolling machine is provided with the suspension clasp.
The lifting sling devices are distributed on the supporting cross beam between the front supporting leg and the rear supporting leg at intervals.
The length of the single-span steel beam is 70-150 m.
The utility model provides a back of body cable formula bridge girder erection machine that is used for combination beam two to stride to do even, simple structure, convenient to use through add the extension section at the bridge girder erection afterbody, has promoted the hoist and mount distance of equipment, has adapted to two and has striden the demand of continuously erectting and pour, compares with current equipment, and its advantage is embodied:
1) the utility model utilizes the form that the back of the hoisting equipment is provided with the steel tower and the inhaul cable, thereby improving the hoisting intensity and the transportation distance of the hoisting equipment and improving the utilization rate of the hoisting equipment;
2) the utility model can be matched with a novel two-span continuous construction mode, namely, the two-span adjacent steel beam is taken as a unit, the two-span bridge deck wet joint is continuously hoisted and poured at one time, the whole construction speed is doubled, the utilization rate of equipment is greatly improved, the engineering construction cost is saved, and the direct economic benefit is generated;
3) the utility model discloses can cooperate neotype two to stride to be even to do the construction method, at first carry out the longitudinal tie of steel girder, accomplish the system conversion that "simply support becomes continuous", then the rethread hoist cable is reversed and is drawn, install the decking, promptly: erecting a steel girder → changing simple support into continuous → installing a bridge deck; compared with the prior construction mode (erecting the steel girder → installing the bridge deck → changing the simple support into the continuous mode), the integral stress performance of the steel girder in the continuous span can be improved, and the stress of the side span is improved;
4) the utility model discloses a cooperate neotype two to stride to be even to do the construction mode, well landing leg longitudinal bridge to setting up to two pairs, through in the same direction as the bridge to remove in proper order, has solved two and has striden the station position problem that the pier top girder connects bridge girder erection machine of department of continuously erectting. When the steel beam is erected, the middle double-supporting leg is supported at the position of the pier top steel beam bottom plate; when wet joints of bridge decks are poured, the middle double support legs are supported on the prefabricated bridge decks on the two sides of the pier tops, so that the standing position of a bridge girder erection machine at the joint of the steel girders at the pier tops is effectively solved when the steel girders are continuously erected, the construction space is ensured, and the bridge girder erection machine is economical and efficient;
5) through the utility model discloses a when frame bridge crane hoist cable carries out carrying simultaneously to adjacent two girder steels of striding, the atress of the girder steel of striding when having improved the wet seam of prefabricated decking of installation, cast-in-place decking, in addition, through adjustment hoist cable force, adopt near the cable force of mound top to be greater than the scheme of mid-span cable force, remove the hoist cable pulling force and form the pre-pressure in the mound top within range afterwards, improved the problem of mound top hogging moment district fracture.
To sum up, use the utility model discloses can realize two strides and do even, promote the construction progress of reinforced concrete composite bridge by a wide margin, improve bridge integrated configuration's stress state, have wide application prospect in the construction of long and large span reinforced concrete composite bridge.
Drawings
Fig. 1 is a schematic structural diagram of the present invention (omitting the girder transporting vehicle).
Fig. 2 is an enlarged view from a-a of fig. 1 (steel beam is hoisted, steel tower and stay cable are omitted).
Fig. 3 is a working schematic diagram of the bridge girder erection machine during the process of hoisting the steel girder.
Fig. 4 is an enlarged view taken along line a-a of fig. 1 (bridge deck is cast, and the steel tower and stay cable are omitted).
Fig. 5 is a schematic working diagram of the bridge girder erection machine during the pouring of the bridge deck.
Fig. 6 is a schematic view of the connection structure of the support leg and the support beam in fig. 1.
Detailed Description
As shown in figures 1 and 2, the back cable type bridge girder erection machine for the two-span continuous fabrication of the composite beam comprises a bridge girder erection machine, wherein a front support leg 2, a middle support leg 3 and a rear support leg 4 are arranged on a support beam 1 of the bridge girder erection machine. In order to increase the hoisting and transporting distance of the bridge girder erection machine, the length (namely the lengthened section) of the supporting beam 1 at the outer side of the front supporting leg 2 is 0.2-0.3 times of the length of the single-span steel girder, and the length of the single-span steel girder is generally 70-150 m. In order to solve the standing problem of the middle supporting leg 3 during continuous hoisting of the two-span steel beam, the middle supporting leg 3 is two pairs of telescopic supporting legs which are arranged in a sliding mode along the longitudinal bridge direction, the top of each middle supporting leg 3 is connected with a sliding rail 3.3 arranged on the bottom surface of the supporting beam 1 through a longitudinal walking wheel 3.2 driven by a motor 3.1, and a movable fastening buckle 3.4 used for locking the position is arranged between the middle supporting leg 3 and the supporting beam 1 (see figure 6). When erecting the steel beam, the two pairs of middle support legs 3 are all supported at the position of the steel beam bottom plate erected at the pier top (see figure 2); when pouring the wet joints of the deck slab, the two pairs of middle legs 3 are supported on the prefabricated deck slab on the left and right sides of the pier top, respectively (see fig. 4). In order to improve the hoisting strength of the bridge girder erection machine, a steel tower 5 is welded on the ridge of the supporting beam 1 corresponding to the position of the middle supporting leg 2, and the steel tower 5 is connected with the supporting beam 1 through a plurality of stay cables 6. Generally, the height of the steel tower 5 is 1/3 of the length of a single-span steel beam, and 4-6 stay cables 6 are respectively arranged on two sides of the steel tower 5. By the structural form, the hoisting strength of the bridge girder erection machine can be improved by about 40%, and meanwhile, the maximum transportation distance is increased to 150 m. The center of the supporting beam 1 is provided with a sliding hoisting device 7 which can move along the bridge direction and the transverse bridge direction and comprises a pair of longitudinal guide rails positioned on the supporting beam 1, the top of the longitudinal guide rails is provided with a movable beam of an electric rope collecting machine in a sliding manner, and a hoisting hook used for hoisting a steel beam is arranged on a hoisting beam connected with the electric rope collecting machine. A plurality of groups of lifting sling devices which are arranged at intervals along the bridge length direction are further arranged on the supporting beam 1 between the front supporting leg 2 and the rear supporting leg 4, and at least two lifting sling devices of each group are respectively arranged at two sides of the sliding lifting device 7. Specifically, each lifting sling device comprises a winding machine 8.1, the winding machine 8.1 is connected with the supporting beam 1 through a transverse bridge pulley with a locking clamping block, and a suspension buckle 8.3 is arranged at the tail end of a sling 8.2 of the winding machine 8.1. In order to solve the problem of cracking of the hogging moment area of the pier top, the pier top area and the midspan area are divided according to the position of the lifting sling device when the device is used, and the cable force value F1 of the lifting sling device of the pier top is different from the cable force value F2 of the midspan sling device. In addition, a beam transporting vehicle 9 is arranged below the supporting beam 1.
Use the utility model discloses can implement neotype two and stride the reinforced concrete composite bridge construction method of doing even, mainly include following step:
firstly, prefabricating steel beam units according to a bridge design scheme, and arranging a temporary hanging piece on each steel beam flange;
after the construction of foundation piles and piers of the bridge is finished, enabling the bridge girder erection machine to move to the first span position and the second span position of the main bridge, and enabling a front supporting leg 2, a middle supporting leg 3 and a rear supporting leg 4 of the bridge girder erection machine to stand on a pier capping beam respectively, wherein the lengthened section of the bridge girder erection machine is positioned at the tail part of the moving direction;
thirdly, the first span steel beam is hoisted in place through the matching of the sliding hoisting device 7 and the beam transporting vehicle 9, and then the second span steel beam is hoisted in place; specifically, the girder transporting vehicle 9 transports the first span girder to the lower part of the lengthened section of the supporting beam 1, the sliding hoisting device 7 is used for hoisting the front end of the girder, the rear end of the girder is still placed on the girder transporting vehicle 9, the girder slowly moves forward, and when the rear end of the girder moves to the hoisting range of the lengthened section of the supporting beam 1, the rear end of the girder is hoisted, and the first span girder is hoisted in place; then, two pairs of middle supporting legs 3 are sequentially lifted, move along the bridge direction and are supported on the erected first span steel beam bottom plate (see fig. 3), and the cross section of the supporting position is shown in fig. 2; and then carrying the second span steel beam by matching the beam carrying vehicle 9 with the sliding hoisting device 7 according to the steps, and hoisting in place.
Fourthly, longitudinally welding the first and second span steel beams to complete the system conversion of 'simply support to continuous' of the two span steel beams;
fifthly, simultaneously installing the prefabricated bridge deck of the first span and the prefabricated bridge deck of the second span; in the process, two pairs of middle supporting legs 3 are sequentially lifted from the position of the bottom plate of the pier top steel beam, move along the bridge direction and are respectively supported on the bridge decks of the first span and the second span on two sides of the pier top (figure 5), and the cross section of the supporting position is schematically shown in figure 4;
sixthly, after the hanging buckles 8.3 at the tail ends of the suspension ropes 8.2 of the bridge girder erection machine are respectively connected with the hanging pieces on the first span steel beam and the second span steel beam, the two span steel beams are simultaneously lifted, and the cable force of the suspension ropes 8.2 is locked after being tensioned to a set value, wherein the cable force value F1 of the suspension ropes on two sides of the pier top along the bridge direction is larger than the cable force value F2 of the suspension ropes in the span;
seventhly, continuously pouring longitudinal and transverse wet joint concrete of the first and second span bridge decks, and removing the connection between the sling 8.2 and the steel beam hanging piece after the cast-in-place concrete reaches the design strength;
and eighthly, enabling the bridge girder erection machine to advance forwards, and constructing according to the method in the second to seventeenth steps when the bridge girder erection machine advances forwards for two spans until the integral bridge girder erection is completed.
Claims (7)
1. The utility model provides a back of body cable formula bridging machine that is used for combination beam two to stride to do, includes the bridging machine body, its characterized in that: the supporting beam of the bridge girder erection machine body is provided with a front supporting leg, a middle supporting leg and a rear supporting leg, the length of the supporting beam at the outer side of the front supporting leg is 0.2-0.3 times of that of a single-span steel beam, the middle supporting leg is two pairs of telescopic supporting legs which are arranged in a sliding mode along the longitudinal bridge direction, a steel tower is arranged on the supporting beam ridge corresponding to the position of the middle supporting leg, and the steel tower is connected with the supporting beam through a plurality of stay cables; the supporting cross beam is provided with a sliding hoisting device moving along the bridge direction, the supporting cross beam is also provided with a plurality of groups of lifting sling devices arranged at intervals along the bridge length direction, and a beam transporting vehicle is arranged below the supporting cross beam.
2. The back cable type bridge girder erection machine for two spans of composite beams as claimed in claim 1, wherein: the height of the steel tower is 1/3 of the length of the single-span steel beam, and 4-6 stay cables are respectively arranged on two sides of the steel tower.
3. The back cable type bridge girder erection machine for two spans of composite beams as claimed in claim 1, wherein: every well landing leg top all is in through motor drive's vertical walking wheel and setting the slide rail of supporting beam bottom surface links to each other, and is provided with movable the knot of fastening between well landing leg and the supporting beam.
4. The back cable type bridge girder erection machine for two spans of composite beams as claimed in claim 1, wherein: the sliding hoisting device comprises a movable cross beam, the top of the movable cross beam is provided with an electric rope collecting machine, the movable cross beam is connected with the supporting cross beam through a longitudinal guide rail, and a hoisting hook is arranged on a hoisting cross beam connected with the electric rope collecting machine.
5. The back cable type bridge girder erection machine for two spans of composite beams as claimed in claim 1, wherein: every it all includes the rolling machine to promote the hoist cable device, the rolling machine through the horizontal bridge to the pulley that sets up with supporting beam links to each other, and the hoist cable end of rolling machine is provided with the suspension clasp.
6. The back cable type bridge girder erection machine for two spans of composite beams as claimed in claim 1, wherein: the lifting sling devices are distributed on the supporting cross beam between the front supporting leg and the rear supporting leg at intervals.
7. The back cable type bridge girder erection machine for two spans of composite beams as claimed in claim 1, wherein: the length of the single-span steel beam is 70-150 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921222763.5U CN210368672U (en) | 2019-07-31 | 2019-07-31 | Back cable type bridge girder erection machine for two-span continuous construction of combined beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921222763.5U CN210368672U (en) | 2019-07-31 | 2019-07-31 | Back cable type bridge girder erection machine for two-span continuous construction of combined beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210368672U true CN210368672U (en) | 2020-04-21 |
Family
ID=70247658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921222763.5U Active CN210368672U (en) | 2019-07-31 | 2019-07-31 | Back cable type bridge girder erection machine for two-span continuous construction of combined beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210368672U (en) |
-
2019
- 2019-07-31 CN CN201921222763.5U patent/CN210368672U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100543235C (en) | The method and system of erecting steel trusses by stay cable auxiliary complete cantilever | |
| CN101586330B (en) | Receding construction method of cradle of continuous girder bridge made of prestressing concrete | |
| CN202936736U (en) | Cable-stayed bridge composite beam construction bridge floor crane | |
| CN104631335A (en) | Novel large-tonnage bridge girder erection machine and construction method thereof | |
| CN109137759B (en) | Precast cantilever assembling method and system for prestressed concrete box girder segment | |
| CN201151881Y (en) | Wheeltrack type hoisting girder machine | |
| CN201106155Y (en) | Inclined guy cable auxiliary full cantaliver crane trussed steel beam device | |
| CN101787678A (en) | Large-span section assembling bridge manufacturing machine and assembling construction process thereof | |
| CN110820602A (en) | Single-segment box girder bridge girder erection machine and operation method thereof | |
| CN210368669U (en) | Hoisting equipment for two-span continuous construction of combined beam | |
| CN113120771A (en) | Double-side synchronous hoisting equipment suitable for rear cantilever arm of composite-section beam bridge and construction method | |
| CN110344334B (en) | Construction method for two-span continuous steel-concrete composite bridge by adopting back cable type bridge girder erection machine | |
| CN111485500A (en) | Transverse lengthening reinforcing construction method and structure for retreating and dismantling of rhombic hanging basket | |
| CN109680614B (en) | Method and equipment for quickly transferring ultra-large bridge girder erection machine of assembled steel-concrete combined bridge | |
| CN207987749U (en) | Ride cable-styled erection crane | |
| CN208533370U (en) | A kind of Bridge Erector of large span steel reinforced concrete combination beam erection construction | |
| CN112030777B (en) | Descending movable formwork support bracket crossing type transfer construction method | |
| CN210766433U (en) | Trapezoidal hanging basket structure | |
| CN212714544U (en) | Rhombus is hung basket and is retreated and demolishd horizontal extension reinforcement construction structure | |
| CN210827111U (en) | Environment-friendly down self-propelled steel trestle structure | |
| CN219218724U (en) | Main girder hanging and paving integrated machine for combined girder cable-stayed bridge | |
| CN116289620A (en) | Box girder steel bar part combined type conveying device and method | |
| CN210368672U (en) | Back cable type bridge girder erection machine for two-span continuous construction of combined beam | |
| CN111119072A (en) | Staggered construction method for steps of high-pier bridge in mountainous area | |
| CN215925692U (en) | Overlength multispan assembly type integrated multifunctional bridge girder erection machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |