CN101041948A - Construction equipment for integral roof-holding highway bridge top superstructure - Google Patents

Abstract

The invention discloses a special construction equipment for integrally jacking up or lowering the superstructure of a highway bridge, which comprises a joist beam, a support column, a reaction frame, a jack, a hanger, an anchor frame, a transverse connecting rod and a base. Under the premise of not destroying the bridge structure, changing the stress conditions of the bridge structure, and building scaffolding under the bridge, several sets of jacking equipment are installed at both ends of the upper structure of the supported bridge span to support the bridge pier. The support column on the top surface is the fulcrum, the upper structure of the adjacent bridge span is the anchor point, and the jack is the driving force. Using the principle of leverage, the upper structure of the entire bridge span is raised from the top of the joist beam. After the lower structure of the bridge span is widened, heightened and maintained, the equipment lowers the upper structure of the entire bridge span to the required height and puts it in place. It has synchronous, stable, fast and safe performance, saves construction period, materials and costs, and is an advanced construction equipment with a high degree of automation.

Description

Construction equipment for overall jacking of highway bridge superstructure

technical field

The invention relates to a special construction equipment for integrally jacking up or lowering the superstructure of highway bridges.

technical background

At present, during the construction of widening, elevating and maintaining highway bridges, the original hoisting equipment such as guide beams and gantry cranes cannot be used due to the excessive weight of the upper structure of the entire bridge span. The sidewalks, railings, lighting, etc. are all removed, and then the longitudinal wet joints between the upper structural beams or slabs are cut open, and the beams or slabs are hoisted out piece by piece by a crane. After the maintenance work such as raising the height of the pier abutment and replacing the bearings, hoist the beams or slabs back one by one, rebuild the longitudinal wet joints of the upper structure, bridge deck pavement and bridge deck system, and restore them to their original state. Since the wet joints between beams or slabs are reinforced concrete structures, it is inevitable that the beams or slabs will be damaged when they are cut open, and it will take a lot of time, materials and manpower to dismantle, cut open, hoist and rebuild. This kind of construction method with high risk, high cost and slow effect urgently needs to be improved.

Contents of the invention

The purpose of the utility model is to provide a construction equipment for supporting the superstructure of a highway bridge as a whole, realize the mechanized hoisting of the superstructure of the entire bridge span, save a lot of manpower, material resources and financial resources, and greatly improve the work efficiency.

The technical scheme of the utility model is as follows:

The invention is a special construction equipment for overall jacking up or lowering of the superstructure of highway bridges, which includes jacking beams, support columns, reaction force frames, jacks, hangers, anchor frames, transverse connecting rods and bases. It is characterized in that: after removing all connections between the bridge span to be supported and the boundary expansion joints, bridge deck continuity, etc., the jacking equipment is grouped and arranged at both ends of the upper structure of the bridge span to be supported. If the superstructure consists of five pieces of reinforced concrete T-beams (or channel beams, etc.), one set of jacking equipment is arranged at the beam end of each piece of beam, that is, five pieces of equipment are arranged at each end of the bridge span, and a total of 10 pieces of equipment are used for jacking construction. ; if the superstructure is composed of twelve reinforced concrete slabs, because the slabs have light weight, one set of jacking equipment is arranged at each end of each two slabs, that is, 6 sets are arranged at each end of the bridge span, and a total of 12 sets of jacking equipment are arranged. construction. Each jacking device is anchored on the upper structure of the adjacent bridge span. In order to make the force uniform, the jacking device is required to be on the same vertical plane as the centerline of the beam or slab of the adjacent bridge span. Drill anchor holes with a diameter of 100 mm at the two original lifting holes at the end of each girder plate of the adjacent bridge span superstructure to install the anchor frame. Use a group of more than two anchor rods to penetrate the hole, bolt the upper outrigger anchor beam placed on the base to the lower outreach anchor beam pocketed at the bottom of the adjacent bridge span beam plate, and anchor the base of the jacking equipment On the beam slabs of adjacent bridge spans; drill holes with a diameter of 100mm at the two original lifting hole positions of each beam slab of the superstructure of the supported bridge span to install hangers. Use a group of several hanging ropes to pass through the hole, and tie the upper overhanging beam placed at the lifting point end of the top joist with the lower overhanging beam pocketed at the bottom of the span beam plate of the supported bridge; Two support holes with a diameter of 120 mm are drilled at the position of the bridge span joints on the centerline of each beam slab to facilitate the installation of support columns. The support column seat of the support column has a pin seat supporting the top joist and a screw seat that can adjust the height of the support column by rotating the screw rod. on the block. The reaction force frame is placed on the anchor frame at the rear end of the base, and the middle part of the upper beam is equipped with a single clevis seat for fixing the jack. The two ends of the upper beam are bolted to the upper end of the column, and the lower end of the column is bolted to the base. The middle part of the jacking beam is supported on the support column, and its lifting point end hangs the joist plate to be lifted, and the power end is connected to the jack. Start the jack to lift or lower the entire upper structure of the supported bridge span. The transverse connecting rod is bolted to the base to connect a group of jacking devices at the end of the bridge into a whole. At the same time, each jacking device is equipped with a high-precision and large-range displacement sensor to track the jacking amount in real time, and the displacement processor is connected with the jack control cabinet for automatic synchronous jacking control. When the weight of the adjacent bridge span is insufficient to meet the jacking force of the supported bridge span, the counterweight can be stacked on the adjacent bridge span.

The construction equipment for the overall jacking of the highway bridge superstructure is characterized in that the jacking beam is a box-shaped girder with large rigidity, and the lifting point end has a bolt hole backing plate which can adjust the position and can fix the hanger, and the power There is a single clevis-shaped seat connected to the jack at the end, and there are pin shafts supported on the top of the support column on both sides of the middle part, and the joist can rotate around the shaft.

The construction equipment for integrally supporting the superstructure of a highway bridge is characterized in that: the support columns are located on both sides of the joists, and the center lines thereof are kept vertical. Each support column includes a support column seat, a screw rod, a steel pipe and a spacer. The support column seat is bolted to the base, the upper pin seat supports the pin shaft of the top joist, and the lower screw seat has a screw rod to adjust the support height and facilitate installation. The lower column of the screw rod is inserted into the upper end of the steel pipe, and the lower end of the steel pipe passes through The supporting holes at the connecting joints of the bridge spans are set on the pads, and the pads are placed on the top surface of the pier abutment.

The construction equipment for integrally supporting the superstructure of a highway bridge is characterized in that: the reaction frame is a portal-shaped rigid frame, including an upper beam, a column, a slide rail and a corbel. A single clevis seat for fixing the jack is placed in the middle of the upper beam, and its two ends are bolted and fixed on the upper end of the column. There are slide rails that limit the lateral movement of the top joist on the column and a corbel that can temporarily support the top joist for the jack to adjust its position, and its lower part is bolted and fixed to the base.

The construction equipment for the overall jacking of the superstructure of the highway bridge is characterized in that: the jack is a double-acting single-rod hydraulic cylinder, both ends of which are installed in the form of a single clevis, and the cylinder end of the hydraulic cylinder is connected to the reaction force frame. The single clevis seat of the beam is connected, and the end of the piston rod is connected with the single clevis seat of the power end of the top joist.

The construction equipment for integrally supporting the superstructure of a highway bridge is characterized in that the hanger includes an upper overhanging beam, a lower overhanging beam, a suspension ring and two sets of suspension ropes. The upper overhanging suspension beam is bolted to the lifting point end of the top joist beam according to the position of the lifting hole of the span beam plate of the supported bridge. The suspension ring can be adjusted to both sides on the upper overhanging suspension beam. It is pocketed at the bottom of the span beam plate of the supported bridge. The suspension rope is tied to the suspension ring of the upper overhanging suspension beam, penetrates the suspension holes drilled at the two original suspension hole positions of the span beam plate of the supported bridge, and is vertically tied to the suspension ring of the lower overhang suspension beam.

The construction equipment for the overall jacking of the superstructure of the highway bridge is characterized in that the anchor frame includes an upper outrigger anchor frame, a lower outreach anchor frame, a bolt backing plate and two sets of anchor rods. The upper overhanging anchor beam is bolted to the base of the reaction frame, the lower overhanging anchor beam is pocketed at the bottom of the adjacent bridge span beam plate, and the anchor rod penetrates into the two original lifting holes of the adjacent bridge span superstructure beam plate. Bolt the backing plates of the upper outreach anchor beam and the lower outreach anchor beam, and anchor the base to the girder plate of the adjacent bridge span.

The construction equipment for the overall jacking of the superstructure of the highway bridge is characterized in that: the base is rectangular, the front end is bolted to the support column seat of the fixed support column, and the rear end is bolted to the column of the fixed reaction force frame and the top of the anchor frame. Extended anchor beams, and bolted and fixed transverse connecting rods on both sides.

The construction equipment for the overall jacking of the superstructure of the highway bridge is characterized in that: the horizontal connecting rod is bolted to the base of the jacking equipment installed in place, and the outer jacking equipment is additionally provided with diagonal braces, so that the bridge span All jacking equipment at the end are horizontally connected as a whole.

The construction equipment for the overall jacking of the superstructure of the highway bridge is characterized in that: the joist beam, the slide rail and the corbel of the reaction frame are welded by steel plates; The upper and lower outrigger beams, transverse connecting rods and bases of the frame and anchor frame are bolted by section steel, the suspension rope is a steel wire rope, the anchor rod is a fine-rolled threaded steel bar, and the support column base of the support column is The backing plate of the cushion block and the anchor frame is cast iron.

The construction equipment for integrally supporting the superstructure of a highway bridge is characterized in that the counterweights are stacked on the superstructure of adjacent bridge spans.

Principle of the invention

In order to smoothly, quickly and safely jack up or lower the upper structure of the bridge span of tens or hundreds of tons, carry out the construction of widening, heightening or maintenance of the bridge pier of the lower structure. A group of several jacking devices are installed at both ends of the upper structure of the supported bridge span to disperse the jacking force. The base of the jacking equipment is fixed on the upper structure of the adjacent bridge span by the anchor frame, and the weight of the adjacent bridge span is used to jack up the supported bridge span. The support column penetrates the drilled holes at the bridge span joints, and is supported on the center line of the top surface of the pier abutment to reduce the eccentricity of the load as much as possible. The power end of the jacking beam is connected to the jack installed on the reaction frame, the lifting point end is suspended by the hanger to the beam plate of the upper structure of the supported bridge span, and the middle is supported on the support column. Using the principle of leverage, with the support column as the middle fulcrum, the jack at the power end of the joist is the power, and the hanger at the lifting point end of the joist will be lifted or lowered by the beam slab that is supported.

Since two sets of jacking equipment work together, each jacking equipment is equipped with a high The displacement sensor with high precision and large range is fixed at the end of the joist plate where the jacking equipment is located, and tracks and detects the jacking amount in real time. All the displacement sensors are connected with the jack control cabinet through the displacement processor, and synchronously control the jacks of each jacking equipment. When any one of the jacking equipment jacks up too much, the displacement sensor detects the slight change, and the displacement processor immediately inputs the signal to the control cabinet, and the control cabinet controls the solenoid valve on the jack oil pipe of the corresponding jacking equipment in time, and waits for the rest The jacking capacity of the jacking equipment can keep up, so as to achieve the purpose of synchronizing the upper structure of the overall jacking bridge span.

Effect of the present invention

The present invention is to simultaneously, smoothly, quickly and safely jack up or support the bridge as a whole under the premise of not destroying the bridge structure, changing the stress conditions of the bridge structure, building scaffolding under the bridge, and not being restricted by the foundation, river water and traffic. Lower the upper structure of the highway bridge, and carry out the construction of widening, heightening or maintenance of the lower structure of the bridge. It greatly saves time, material, manpower and cost, and makes the project effective as soon as possible. At the same time, the jacking equipment is small in size, light in weight, easy to transport and install, can be reused, and is suitable for the construction of highway bridges with different spans, different beam-slab structures and different tonnages.

Description of drawings

Fig. 1 is a schematic diagram of the front view structure of the present invention.

Fig. 2 is a top view structural schematic diagram of the present invention.

Figure 3 is the front view of the top joist of the present invention.

Fig. 4 is the top view of the top joist of the present invention.

Fig. 5 is a side view structural schematic diagram of the support column of the present invention.

Fig. 6 is a schematic side view structure diagram of the hanger of the present invention.

Fig. 7 is a schematic side view structural diagram of the reaction frame and the anchor frame of the present invention.

Detailed ways

See Figure 1-10. A construction device for integrally supporting the upper structure of a highway bridge, comprising a joist beam 1, a support column 4, a reaction force frame 11, a jack 16, a hanger 17, an anchor frame 22, a base 27, and a transverse connecting rod 28. After clearing the top surface of the bridge pier 32, place the spacer 10 on the top surface of the bridge pier 32, and put the steel pipe 9 into the support hole 33 and put it on the spacer 10. After measuring the position of all jacking equipment, put them in place, use a wrench to rotate the screw rod 8 in the screw rod seat 7 at the bottom of the support column base 5, insert the cylinder at the lower end of the screw rod 8 into the upper end of the steel pipe 9, and screw it until the base 27 is slightly jacked up, and it is connected to the bridge. There is about a 1 cm gap on the surface. On the base 27 of the anchor hole 34 position, the upper outstretched anchor beam 23 of the anchor frame 22 is bolted, and the anchor rod 26 penetrates from the anchor hole 34, and the bolt backing plate 25 of the upper outstretched anchor beam 23 is adjacent to the pocket The bolt backing plate 25 of the anchor beam 24 protruding from the bottom of the bridge span beam plate 30 is bolted with the anchor rod 26, and the base 27 is anchored on the adjacent bridge span beam plate 30. The base 27 of all jacking equipment is laterally connected as a whole with the beam connecting rod 28. On the bridge surface of the adjacent bridge span 30 on the jacking equipment rear side, an appropriate amount of sandbag counterweight is piled up to increase the weight of the adjacent bridge span 30. Bolt the overhanging beam 18 on the lifting point end of the jacking beam 1 at the position of the hoisting hole 35, and the suspension rope 21 is passed through the hoisting hole 35, and the ring 20 of the upper overhanging beam 18 and the pocket are supported by the jacking The suspension ring 20 of the overhanging suspension beam 19 at the bottom of the bridge beam plate 29 is fastened. Start the jack 16 to lift the top joist 1, and after the outstretched suspension beam 19 is close to the bottom of the top joist plate 29, the corbel 15 on the reaction force frame 11 supports the top joist 1, temporarily replacing the jack 16 for stress. A displacement sensor is respectively installed at the ends of all joist plates 29, and its displacement processor is connected with the jack control cabinet to carry out automatic synchronous jacking control. After all jacking constructions are ready, start the jack 16 again, remove the corbel 15, and carry out the upper structure of the overall jacking bridge. After the entire upper structure of the bridge is raised to the required height, if the construction of maintenance such as widening and heightening the lower structure of the bridge or replacing the rubber bearing 31 takes a long time, the corbel 15 on the reaction frame 11 can also be used instead of the jack 16. force. After the construction of the bridge substructure is completed, the jack 16 is started, and the corbel 15 is removed, so that the upper structure of the supported bridge span is lowered to the pier abutment 32 of the substructure as a whole.

The effect of the joist 1 is a lever, the pin shaft 2 in the middle is supported on the support column 4, the single clevis seat 3 at the power end is connected to the jack 16, and the hanger 17 at the lifting point end is lifted by the joist plate 29. The role of the support column 4 is to support the joist 1 and bear all the loads. The pin seat 6 on the upper part of the support column seat 5 supports the pin shaft 2 in the middle of the top joist 1, and the screw inside the screw seat 7 on the lower part of the support column seat 5 8 is used to adjust the support height and facilitate installation. The effect of the steel pipe 9 is to connect the support column base 5 with the cushion block 10, and its length is set according to the height of the upper structure beam plate 29 of the supported bridge span. The effect of cushion block 10 is to support steel pipe 9, does not allow bridge abutment abutment 32 top surface stressed too concentrated. The effect of the reaction frame 11 is that the upper beam 12 is equipped with a jack 16, and the column 13 fixes the upper beam 12 and transmits the jacking load to the base 27. The slide rail 14 on the column 13 is to allow the joist 1 to keep running in the vertical direction to prevent lateral instability. The effect of corbel 15 is to replace jack 16 when the time of bridge substructure widening, heightening or maintenance construction is too long. The effect of hanger 17 is to hang joist 1 by jacking beam plate 29 by jacking. The function of the anchor frame 22 is to securely anchor the base 27 to the adjacent span girder plate 30 . The effect of base 27 is to fix support column 4, reaction force frame 11, anchor frame 22 and transverse link 28. The effect of transverse connecting rod 28 is that the base 27 of all jacking equipment at the bridge end is horizontally linked into a whole.

Concrete use of construction equipment for overall jacking of highway bridge superstructure

1. Prepare the construction site. All the expansion joints and bridge deck continuous structures connected by the supported bridge span and the boundary are all chiseled and cleared. Use a drill to drill 100 mm diameter lifting holes and anchor holes at the original lifting hole positions of all girder slabs of the supported bridge span and adjacent bridge spans. Then use a drill bit to drill support holes with a diameter of 120 mm on the continuous seams of the bridge span and symmetrically to each joist plate to be lifted, and clean the top surface of the pier abutment.

2. After placing the supporting column block on the top surface of the pier abutment, put the steel pipe through the supporting hole and set it on the block.

3. The installation position of all jacking equipment is measured and put in place after setting out.

4. Use a wrench to rotate the screw in the support column base, insert the cylinder at the lower end of the screw into the steel pipe, and screw until the base is lifted about 1 cm from the bridge deck.

5. Use a group of more than two precision-rolled threaded steel anchor rods to penetrate the anchor holes on the adjacent bridge span, and connect the upper overhanging anchor beam of the base with the lower overhanging anchor beam at the bottom of the adjacent bridge slab. bolted backing plate to anchor the base to the adjacent span.

6. Connect the bases of all the jacking equipment at the end of the bridge horizontally to form a whole with transverse connecting rods.

7. Use a group of suspension ropes of several steel wire ropes to penetrate the suspension holes of the span beam plate of the supported bridge, and connect the upper extension suspension beam on the top joist with the lower extension suspension beam at the bottom of the adjacent bridge span. Hanging ring fastened.

8. After all the jacking equipment completes the above process, start the jacks one by one, and the jacking beam starts to lift. After the lower overhanging beam is close to the bottom of the joist plate, let the corbel on the reaction frame temporarily replace the jack to bear the force.

9. A displacement sensor is installed at the end of all the joists to be lifted, and its displacement processor is connected to the jack control cabinet to perform automatic control of the overall synchronous jacking of the upper structure of the bridge.

10. All the jacking construction is ready, and the overall jacking of the upper structure of the bridge span begins. Start the jack, remove the corbels on the reaction frame, and lift the entire upper structure of the supported bridge span to the required height. If the construction of the widening, heightening or maintenance of the bridge substructure takes a long time, the corbels on the reaction frame can be used instead of the jack to bear the force.

11. Carry out maintenance construction such as widening, heightening or replacing bearings of the bridge substructure.

12. After the widening, heightening or maintenance of the lower structure of the bridge is completed, start the jack, remove the corbel, and let the upper structure supported by the span be lowered to the top of the pier abutment of the lower structure as a whole.

13. At that time, the construction of the upper structure of the overall jacking highway bridge will be completed.

Claims (9)

1, a kind of construction equipment for integral roof-holding highway bridge top superstructure, comprised the jacking beam, support column, reaction frame, jack, suspension bracket, anchor rack, transverse link and base, it is characterized in that: one group of number jacking equipment respectively is being installed by the two ends of jacking spanning superstructure, and connect with transverse link, the base of every jacking equipment is fixed on the superstructure of adjacent spanning with anchor rack, the jacking beam is installed on the base, support column and reaction frame, the power end of jacking beam is connected with jack on being installed in reaction frame, the suspension centre end hangs by the beam or the plate of jacking spanning superstructure with suspension bracket, and intermediate supports is at the support column top of bridge pier countertop.

2, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1 is characterized in that: the layout of described jacking equipment, when being the beam type superstructure, a jacking equipment is installed at the beam-ends of every beam by the spanning of jacking; When being board-like superstructure by the spanning of jacking, at the plate end of every two boards a jacking equipment is installed, jacking equipment with by the center line of jacking beam slab on same vertical guide.

3, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1, it is characterized in that: described jacking beam is a box-girder, its suspension centre end has the adjustable position and the fixing keyhole of suspension bracket, power end has the ring-like seat of the monaural that is connected with jack, and there is the bearing pin that is supported on the support column top both sides of middle part.

4, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1, it is characterized in that: described support column is positioned at the both sides at jacking beam middle part, it is vertical that its center line keeps, every support column comprises support column base, screw rod, steel pipe and cushion block, support the column base bolt and be fixed in base, supporting column base top has the axis pin base of supporting jacking beam, in the screw bolt seat of support column base bottom screw rod is arranged, the cylinder of screw rod bottom inserts steel pipe, the steel pipe lower end is enclosed within on the cushion block, and cushion block is placed on the end face of bridge pier platform.

5, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1, it is characterized in that: described reaction frame is door shape rigid frame, comprise top rail, column, slide rail and bracket, the centre of top rail is equipped with the fixedly ring-like seat of monaural of jack, the two ends bolt of top rail is fixed in the top of column, the bracket of the slide rail of restricted jacking beam shifted laterally and energy adjusting position temporary support jacking beam on the column, its underpart bolt is fixed in base.

6, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1 is characterized in that: described suspension bracket comprises overhanging hanging beam, following overhanging hanging beam, suspension ring and two groups of lifting ropes.Go up overhanging hanging beam according to by the hoisting point position of jacking spanning beam slab, bolt is fixed on the suspension centre end of jacking beam, down overhanging hanging beam pocket is by the bottom of jacking beam slab, and suspension ring can be done the position adjustment of both sides on last overhanging hanging beam, and lifting rope lies in overhanging hanging beam and descends the suspension ring of overhanging hanging beam.

7, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1, it is characterized in that: described anchor rack comprises overhanging anchor beam, following overhanging anchor beam, bolt backing plate and two groups of anchor poles, go up overhanging anchor beam and be bolted to base, overhanging anchor beam pocket is in the bottom of adjacent spanning beam slab down, and anchor pole is bolted to the bolt backing plate of overhanging anchor beam and following overhanging anchor beam.

8, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1, it is characterized in that: described base is a rectangle, the support column base of front end bolt fixed support post, the rear end bolt is the column of reaction frame and the last overhanging anchor beam of anchor rack fixedly, and both sides bolt fixed lateral connecting rod.

9, construction equipment for integral roof-holding highway bridge top superstructure according to claim 1, it is characterized in that: the slide rail of described jacking beam, reaction frame and bracket are welded steel plate, overhanging beam up and down, transverse link and the base of the column of described reaction frame and top rail, suspension bracket and anchor rack forms for the shaped steel bolt, described lifting rope is a wire rope, described anchor pole is a finish rolling deformed bar, and the bolt backing plate of the support column base of described support column and cushion block, anchor rack is a cast iron.

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