CN114855620B - Integral lifting and anchoring device for bridge steel pipe arch rib and construction method thereof - Google Patents

Abstract

The bridge steel pipe arch rib integral lifting anchoring device is characterized in that a plurality of horizontal anchoring upper stitching pipes are arranged between upper chord pipes on two sides of the arch rib, a horizontal anchoring lower stitching pipe is arranged between lower chord pipes on two sides of the corresponding position, and the anchoring upper stitching pipes are connected with the anchoring lower stitching pipes through a plurality of vertical connecting rods; the middle point of the anchoring upper stitching pipe is provided with a vertical sling hole, the side wall of the sling hole is provided with a steel sleeve, the sling penetrates through the sling hole and is anchored at the hole bottom to realize suspension, and the anchoring lower stitching pipe is a tie rod anchoring member. According to the utility model, the fixed pipe is additionally arranged as a sling anchoring structure for integrally lifting the arch rib of the steel pipe arch bridge, so that the structure is simple, the stress is definite, and the local stability of a structural member is enhanced and the stress of the member is reduced by filling high-strength concrete in the fixed pipe; the upper and lower decorating pipes are connected through the connecting rods, so that the integral characteristic of the arch rib is fully exerted.

Description

Integral lifting and anchoring device for bridge steel pipe arch rib and construction method thereof

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a bridge steel pipe arch rib integral lifting and anchoring device and a construction method thereof.

Background

Arch bridges are one of the basic forms of bridge structures and have wide application. The steel pipe concrete arch bridge is to fill the arch rib steel pipe with concrete, and the expansion of the compressed concrete is limited due to the radial constraint of the steel pipe, so that the concrete is in a three-way compression state, and the compressive strength of the concrete is obviously improved. Meanwhile, the steel pipe has the functions of the longitudinal main ribs and the transverse hoops, can be used as a construction template, is convenient for concrete pouring, can be used as a stiff bearing framework in the construction process, is simple in welding work and light in hoisting weight, and can simplify the construction process and shorten the construction period.

At present, two construction methods of cable hoisting, cable pulling, buckling and turning are mainly adopted for the large-span arch bridge, and compared with the two construction methods, the integral hoisting method has fewer examples in the construction of the large-span arch bridge, and has the following advantages: 1. the assembling of the arch rib structure is carried out on the ground or a lower bracket, so that the risk of high-altitude operation is avoided, the assembling and welding difficulty is greatly reduced, and the welding quality of the arch rib structure and the linearity of the arch rib are ensured; 2. compared with other methods, the arch rib is simpler to install, and the construction period is shorter. The main equipment in the construction process is equipment, and other mechanical equipment and construction materials are less, so that the economical efficiency is also ensured.

Along with the development progress of computer control technology and hoisting equipment, the integral hoisting construction method is developed and perfected. By consulting the literature, the arch bridge constructed by adopting the integral lifting method is mainly a steel box arch bridge and a steel truss arch bridge, the steel pipe concrete arch bridge construction is less in cases by adopting the integral lifting construction method, and the detail treatment which can be used for reference is less. The existing arch bridge adopting the integral lifting construction method mainly comprises a steel truss arch and a steel box arch, wherein the rigidity is larger, the setting position and the structural form of an anchoring structure are single, for example, the anchoring structure of the steel box arch is basically arranged below an arch box bottom plate at the arch foot of a lifting section and is welded with the arch box bottom plate and a web plate, the effect of tie rod tension on an arch rib is lower, the local stress is larger, and the weight of an anchoring device is larger, but the arch rib construction is basically finished because the working procedures of pumping concrete in an arch box is not needed after the steel box arch is arched, and the arch box can be reinforced at the position with larger local stress under the tension of tie rods and slings;

the steel truss arch member is relatively smaller, the setting position of the anchoring structure is single, the anchoring structure is basically arranged on truss nodes, after the tie rod slings are tensioned, the stress of the structure in the lifting process is basically consistent with that of a bridge formation state, and the structure is not greatly influenced. For a truss type steel pipe arch rib arch bridge, the lifting process is difficult to be consistent with the arch forming state of the empty pipe, four chord pipes are required to be surrounded into a whole by adopting an anchoring device, and the chord pipes are locally reinforced, the anchoring structure designed by the method needs more steel materials, the welding workload is larger, and the later cutting is difficult due to the welding with the four chord pipes, so that the method is not feasible; the truss structure is difficult to be in a stressed state, chord tubes of truss type steel tube arch ribs are relatively large, and the anchoring device is relatively difficult to design on the node. After the integral lifting is completed, the arch rib and the anchoring structure are welded into a whole, the anchoring structure is cut in a large area after the arch rib is closed, and the mechanical property of the arch rib member is changed due to the high temperature of the steel member after the cutting, so that the rigidity and the resistance of the arch rib member are affected.

Relevant documents on the arch bridge rib integral lifting device and method are searched as follows: 1. a top steel box girder of an inward tilting steel box arch bridge arch rib integral lifting system; CN201820412955.1; the top steel box girder of the integral lifting system of the arch rib of the inward-tilting steel box arch bridge comprises a cubic main body steel box, wherein the main body steel box is surrounded by a top plate, a bottom plate and a web plate, more than two steel box girder bases are fixed below the main body steel box at intervals, and the lower parts of the steel box girder bases are supported by lifting bracket steel pipes; the main body steel box is provided with more than two hoisting hole sites in a penetrating way along the vertical direction at intervals, and the hoisting hole sites are in one-to-one correspondence with hoisting hole sites of a lower hoisting device of an arch rib integral hoisting system of the inward-tilting steel box arch bridge. The utility model can quickly, safely and integrally lift the arch rib of the inward-inclined steel box arch bridge to the assembling position at one time, thereby greatly improving the construction efficiency of assembling the arch rib.

2. The whole lifting construction tower structure of the middle section arch rib of the basket arch; CN202121049017.8; a lifting construction tower structure for a basket arch middle section arch rib. The integral lifting construction tower structure comprises a basket arch middle section arch rib and integral lifting towers arranged on two sides of the basket arch middle section arch rib; the lifting jack is arranged at the top of the integral lifting tower, the lifting jack is connected with a vertical lifting steel beam, the lower end of the vertical lifting steel beam is connected with a lifting cross beam, the lifting cross beam is connected with the lower end of a lifting basket arch middle section arch rib, the bottoms of two sides of the lifting basket arch middle section arch rib are connected through a longitudinal temporary prestressed steel cable, and the bottoms of the same sides are connected through a transverse temporary prestressed steel cable. According to the utility model, longitudinal and transverse prestress constraint is carried out on the bottom of the middle arch rib of the basket arch to limit the longitudinal bridge direction, the transverse bridge direction plane displacement and the torsional deformation of the arch foot section during integral lifting, so that the construction period and the cost of the basket arch bridge are saved, the construction risk is reduced, and the closure precision is ensured.

3. An integral lifting horizontal restraint device for an arch rib of an inward-tilting steel box arch bridge; CN201820334208.0; the utility model provides an integral promotion horizontal restraint device of interior tilting steel case arched bridge arch rib, includes horizontal restraint rope and the base steel case that is used for promoting steel case arched rib that sets up of relative main bridge central plane symmetry, the base steel case is enclosed into cuboid by the base outside steel sheet, the base steel case is worn to be equipped with more than two horizontal seamless steel pipes in parallel still interval along the arch axis direction; the horizontal constraint ropes are horizontally arranged prestress steel strand groups, each horizontal seamless steel pipe and the horizontal seamless steel pipes oppositely arranged form a group of opposite-pulling horizontal seamless steel pipes, a group of prestress steel strands penetrate through each group of opposite-pulling horizontal seamless steel pipes, one ends of the prestress steel strands are arranged on the outer sides of the base steel boxes, and the other ends of the prestress steel strands are arranged on the outer sides of the opposite base steel boxes. The horizontal opposite pulling device helps to offset the outward deformation force generated by the dead weight of the steel box arch rib, so that the installation accuracy of the steel box arch rib is ensured.

4. A steel pipe concrete arch bridge arch rib low-level assembling and lifting system; CN201721820329.8; the utility model provides a hoisting system is assembled to steel pipe concrete arch bridge arch rib low level, including interim landing stage, the arch rib installing support of setting in interim landing stage both sides, and locate the arch rib lifting support of interim landing stage top, still including setting up the promotion pylon in interim landing stage both sides respectively, link to each other through the pressure tower cable between the hoist tower top in both sides, both sides promote the pylon top and still be connected with the articulated fixed cable of earth anchor respectively, both sides promote the pylon top and still be connected with the hoisting cable who is connected with the mid span arch rib of below, the mid span arch rib adopts low level installation through the arch rib lifting support, the mid span arch rib carries out normal position installation through the arch rib installing support, the rethread promotes the pylon and wholly promotes the mid span arch rib to predetermined position, fold the construction, the construction degree of difficulty of bridge arch rib has been reduced effectively, moreover, the mid span arch rib is whole promotion, can shorten construction cycle, also make mid span arch rib and side span arch rib fold the precision obtain guaranteeing.

Although the above documents also mention some techniques concerning the lifting of the arch rib, the effect of effectively stabilizing the whole lifting arch rib and maintaining its morphology and stress stability is not achieved.

Disclosure of Invention

The utility model aims to provide a bridge steel pipe arch rib integral lifting anchoring device and a construction method thereof, wherein a decoration pipe is additionally arranged as a sling anchoring structure for integrally lifting the steel pipe arch bridge arch rib, the structure is simple, the stress is definite, and the local stability of structural members is enhanced and the stress of the members is reduced by filling high-strength concrete into the decoration pipe; the upper and lower decorating pipes are connected through the connecting rods, so that the integral characteristic of the arch rib is fully exerted.

The technical scheme adopted by the utility model is as follows:

the bridge steel pipe arch rib integral lifting anchoring device is characterized in that a plurality of horizontal anchoring upper stitching pipes are arranged between upper chord pipes on two sides of the arch rib, a horizontal anchoring lower stitching pipe is arranged between lower chord pipes on two sides of the corresponding position, and the anchoring upper stitching pipes are connected with the anchoring lower stitching pipes through a plurality of vertical connecting rods; the middle point of the anchoring upper stitching pipe is provided with a vertical sling hole, the side wall of the sling hole is provided with a steel sleeve, the sling penetrates through the sling hole and is anchored at the hole bottom through an anchor device to realize suspension, and the anchoring lower stitching pipe is a tie rod anchoring member.

The bottom of the sling hole is provided with a cushion block, and the sling hole penetrates through the center of the cushion block.

And the cavity in the anchoring upper decorating pipe is filled with high-strength concrete.

The cushion block is formed by welding and fixing a bottom plate and four side plates on an anchoring upper-decorating pipe, and a fine stone concrete is filled in the cavity of the cushion block.

The connecting rods are positioned on two sides of the sling hole and cling to the side plates of the cushion block.

The anchor down-set tube has two forms: the anchor lower decorating pipe A and the anchor lower decorating pipe B are arranged, wherein the anchor lower decorating pipe A is provided with a horizontal transverse tie rod hole, the side wall of the tie rod hole is a steel sleeve, the anchor lower decorating pipe A is anchored with the tie rod through a tensioning jack, the bottom of the tie rod hole is also provided with a cushion block, the cushion block is formed by welding and fixing a bottom plate and four side plates on the anchor upper decorating pipe, and a cavity in the cushion block is filled with fine stone concrete; the anchor down tube B is not provided with tie bar holes. If the tension required to balance the tie bars is not large, only one layer of tie bars can be provided, and if the tension required to balance the tie bars is large, two or more layers of tie bars can be provided.

The anchor device is provided with a plurality of anchor holes, each anchor hole is provided with a jacket, and each anchor hole anchors one sling.

The construction method of the bridge steel pipe arch rib integral lifting and anchoring device comprises the following steps:

(1) Cutting and blanking in a steel structure processing plant according to the design construction diagram of each component, and simultaneously processing an anchoring and decorating pipe for a sling anchoring structure and a permanent decorating pipe for an arch bridge structure, wherein the processing technology is the same as that of a hanging rod decorating pipe;

(2) Cutting and blanking the bottom plate, the side plates, the connecting rods and the steel sleeves of the pore canals of the cushion block in a steel structure processing plant according to the design construction drawing;

(3) Welding the cut semi-finished rod pieces according to a design construction drawing, and welding the cushion block, the decorating pipe and the steel sleeve into a whole;

(4) Welding the string tube and the anchor fixing tube in an assembly field, and welding a connecting rod; high-strength concrete in the decorating pipe is poured into the holes, and hole sealing is carried out; filling fine stone concrete in the cushion block through the holes, and sealing holes;

(5) The on-site low-level assembled arch rib is assembled, and slings and tie bars are timely installed after the low-level assembled arch rib is closed;

(6) After bridging, only the connecting rods may be cut, with the remaining anchor structure bars serving as permanent formations for the ribs.

The utility model has the advantages that:

1. according to the utility model, the fixing pipe is additionally arranged as the sling anchoring structure, so that the anchoring structure is very light and handy, the material consumption of the anchoring structure is reduced, and better economic benefit is obtained.

2. The utility model adopts the fixed pipe welded between the upper chord pipe and the lower chord pipe as the anchoring structure, does not need to dismantle the anchoring structure, and is used as a part of the arch rib structure to form a permanent combined structure, thereby reducing the dismantling work and simultaneously reducing the influence of cutting dismantling on the steel performance.

3. According to the utility model, the high-strength concrete is filled in the decorating pipe, so that the local stability of the structure is enhanced, the problem of overlarge stress of the component is reduced, the material consumption of the anchoring structure is reduced, and meanwhile, the resistance of the structure is improved.

4. The utility model effectively distributes sling force to the upper chord tube and the lower chord tube by arranging the connecting rod, and fully plays the integral role of the steel tube arch rib.

5. In the form of the utility model, the anchoring lower-decorating pipe has vertical anchoring connection relation with the sling, and can also have transverse connection relation with the tie rod, so that a tight connection structure is formed, in the lifting process, the arch rib is on the basis of keeping stable and non-deformable shape, the sling and the tie rod bear most of stress, and each connection node of the arch rib is well protected; the tie rod anchoring device and the sling anchoring device are simultaneously considered to be integrally designed.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an arch bridge;

FIG. 2 is an enlarged schematic view of the structure shown at I in FIG. 1;

fig. 3 is a schematic view of a longitudinal cross-sectional structure of an upper and lower anchor fixing tube (anchor fixing tube a form);

fig. 4 is a schematic view of a lateral side view of an upper and lower anchor prefix tube (anchor prefix tube a version);

fig. 5 is a schematic view of a transverse cross-sectional structure of an upper and lower anchor fixing tube (anchor fixing tube B form);

the serial number name in the figure is: 1-sling, 2-tie bars, 31-upper chord tubes, 32-permanent upper chord tubes, 33-lower chord tubes, 34-permanent lower chord tubes, 35-web members, 41-anchoring upper chord tubes, 42-anchoring lower chord tubes, 421-anchoring lower chord tubes A, 422-anchoring lower chord tubes B, 43-cushion blocks, 44-steel sleeves, 5-connecting rods, 6 and anchorage devices; 7. and (5) tensioning the jack.

Detailed Description

Example 1

The whole lifting and anchoring device of the bridge steel pipe arch rib is characterized in that a plurality of horizontal anchoring upper stitching pipes 41 are arranged between the upper chord pipes 31 on two sides of the arch rib, a horizontal anchoring lower stitching pipe 42 is arranged between the lower chord pipes 33 on two sides of the corresponding position, and the anchoring upper stitching pipes 41 and the anchoring lower stitching pipes 42 are connected through a plurality of vertical connecting rods 5; the midpoint of the anchor upper stitching tube 41 is provided with a vertical sling hole, the side wall of the sling hole is provided with a steel sleeve 44, the sling 1 passes through the sling hole and is anchored at the hole bottom through an anchor 6 to realize suspension, and the anchor lower stitching tube 42 is a tie rod anchoring member.

The bottom of the sling hole is provided with a cushion block 43, and the sling hole penetrates through the center of the cushion block 43.

The hollow space in the anchor upper tube 41 is filled with high-strength concrete.

The cushion block 43 is formed by welding and fixing a bottom plate and four side plates on the anchoring upper decorating pipe 41, and the cavity in the cushion block 43 is filled with fine stone concrete.

The connecting rods 5 are positioned at two sides of the sling hole and cling to the side plates of the cushion block 43.

The anchor down tube 42 has two forms: the anchor lower-fixing pipe A421 and the anchor lower-fixing pipe B422, wherein the anchor lower-fixing pipe A421 is provided with a horizontal transverse tie rod hole, the side wall of the tie rod hole is a steel sleeve 44, the anchor lower-fixing pipe A421 is anchored with the tie rod 2 through a tensioning jack 7, the bottom of the tie rod hole is also provided with a cushion block 43, the cushion block 43 is formed by welding and fixing a bottom plate and four side plates on the anchor upper-fixing pipe 41, and a cavity in the cushion block 43 is filled with fine stone concrete; the anchor sub-tube B422 is not provided with tie bar holes.

The anchorage device 6 is provided with a plurality of anchorage holes, each anchorage hole is provided with a jacket, and each anchorage hole anchors one sling.

The whole lifting and anchoring device for the bridge steel pipe arch rib comprises the following steps:

(1) Cutting and blanking in a steel structure processing plant according to the design construction diagram of each component, and simultaneously processing an anchoring and decorating pipe for a sling anchoring structure and a permanent decorating pipe for an arch bridge structure, wherein the processing technology is the same as that of a hanging rod decorating pipe;

(2) Cutting and blanking the bottom plate, the side plates, the connecting rods and the steel sleeves of the pore canals of the cushion block in a steel structure processing plant according to the design construction drawing;

(3) Welding the cut semi-finished rod pieces according to a design construction drawing, and welding the cushion block, the decorating pipe and the steel sleeve into a whole;

(4) Welding the string tube and the anchor fixing tube in an assembly field, and welding a connecting rod; high-strength concrete in the decorating pipe is poured into the holes, and hole sealing is carried out; filling fine stone concrete in the cushion block through the holes, and sealing holes;

(5) The on-site low-level assembled arch rib is assembled, and slings and tie bars are timely installed after the low-level assembled arch rib is closed;

(6) After bridging, only the connecting rods may be cut, with the remaining anchor structure bars serving as permanent formations for the ribs.

Application examples:

the total weight of the anchoring structure and the weight ratio of the lifting arch rib are about 10 percent according to the statistics of the using amount of the whole lifting anchoring structure of the conventional steel box or steel tube concrete arch bridge, and the total weight of the anchoring structure and the weight ratio of the lifting arch rib are 0.55 percent, so that a large amount of steel can be saved.

Claims (7)

1. The utility model provides a bridge steel pipe arch rib wholly promotes anchor which characterized in that: a plurality of horizontal anchoring upper stitching pipes (41) are arranged between the upper chord pipes (31) on the two sides of the arch rib, a plurality of horizontal anchoring lower stitching pipes are arranged between the lower chord pipes (33) on the two sides of the corresponding position, and the anchoring upper stitching pipes (41) are connected with the anchoring lower stitching pipes through a plurality of vertical connecting rods (5); the middle point of the anchoring upper decorating pipe (41) is provided with a vertical sling hole, the side wall of the sling hole is provided with a steel sleeve (44), the sling (1) passes through the sling hole and is anchored at the bottom of the hole through an anchorage device (6) to realize suspension, and the anchoring lower decorating pipe is an anchoring member of the tie bar (2);

the anchor down-set tube has two forms: an anchor lower-decorating pipe A (421) and an anchor lower-decorating pipe B (422), wherein the anchor lower-decorating pipe A (421) is provided with a horizontal transverse tie rod hole, the side wall of the tie rod hole is a steel sleeve (44), the anchor lower-decorating pipe A (421) is anchored with a tie rod (2) through a tensioning jack (7), one end of the tie rod hole, far away from the tie rod, is also provided with a cushion block (43), the tensioning jack (7) is supported on the cushion block (43), the cushion block (43) is formed by welding and fixing a bottom plate and four side plates on the anchor upper-decorating pipe (41), and a cavity in the cushion block (43) is filled with fine stone concrete; the anchor down tube B (422) is not provided with tie bar holes.

2. The bridge steel pipe arch rib integral lifting and anchoring device according to claim 1, wherein: the bottom of the sling hole is provided with a cushion block (43), and the sling hole penetrates through the center of the cushion block (43).

3. The bridge steel pipe arch rib integral lifting and anchoring device according to claim 1, wherein: the inner cavity of the anchoring upper decorating pipe (41) is filled with high-strength concrete.

4. The bridge steel pipe arch rib integral lifting and anchoring device according to claim 2, wherein: the cushion block (43) is formed by welding and fixing a bottom plate and four side plates on the anchoring upper decorating pipe (41), and a fine stone concrete is filled in the inner cavity of the cushion block (43).

5. The bridge steel pipe arch rib integral lifting and anchoring device according to claim 2, wherein: the connecting rods (5) are positioned at two sides of the sling hole and cling to the side plates of the cushion block (43).

6. The bridge steel pipe arch rib integral lifting and anchoring device according to claim 1, wherein: the anchor device (6) is provided with a plurality of anchor holes, the anchor holes are provided with jackets, and each anchor hole anchors one sling.

7. The bridge steel pipe arch rib integral lifting and anchoring device according to claim 2, 4 or 5, wherein the construction method comprises the following steps:

(1) Cutting and blanking in a steel structure processing plant according to the design construction diagram of each component, and simultaneously processing an anchoring upper-decorating pipe and an anchoring lower-decorating pipe for a sling anchoring structure and a permanent decorating pipe for an arch bridge structure, wherein the processing technology is the same as that of a suspender decorating pipe;

(2) Cutting and blanking the bottom plate, the side plates, the connecting rods and the steel sleeves of the pore canals of the cushion block in a steel structure processing plant according to the design construction drawing;

(3) Welding the cut semi-finished rod pieces according to a design construction drawing, and welding the cushion block, the anchoring upper attaching pipe, the anchoring lower attaching pipe and the steel sleeve into a whole;

(4) A plurality of horizontal anchoring upper stitching pipes are welded between the upper chord pipes at the two sides of the assembly field, horizontal anchoring lower stitching pipes are welded between the lower chord pipes at the two sides of the corresponding positions, and the anchoring upper stitching pipes are welded and connected with the anchoring lower stitching pipes through a plurality of vertical connecting rods; pouring high-strength concrete in the anchoring upper-decorating pipe and the anchoring lower-decorating pipe through the holes, and sealing holes; filling fine stone concrete in the cushion block through the holes, and sealing holes;

(5) The on-site low-level assembled arch rib is assembled, and slings and tie bars are timely installed after the low-level assembled arch rib is closed;

(6) After bridging, only the connecting rod is cut, and the anchoring upper and lower fixing pipes are used as permanent structures of the arch ribs.