CN214459656U

CN214459656U - Anchor pulling type bracket device

Info

Publication number: CN214459656U
Application number: CN202022984547.3U
Authority: CN
Inventors: 徐同桐; 蔡钦好; 侯兵; 邱文湖
Original assignee: China Railway Erju 4th Engineering Co Ltd
Current assignee: China Railway Erju 4th Engineering Co Ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-10-22
Anticipated expiration: 2030-12-10

Abstract

The utility model relates to a cast-in-place construction technical field of continuous beam side bay, a draw anchor formula bracket device is disclosed, include along following the unsettled bracket that runs through the pier in the same direction as the bridge, unsettled bracket is used for with pier fixed connection, unsettled bracket is including the cast-in-place end and the counter weight end that are located the pier opposite side respectively, tensioning equipment has been placed on the counter weight end, tensioning equipment can be connected with the cushion cap anchor, unsettled bracket does not receive the restriction in construction topography waters, the holding surface of the cast-in-place section construction of pier both ends side bay is provided, tensioning equipment simple structure, occupation space is few, can control construction cost, the counter weight operation is swift, can adjust the counter weight in a flexible way, easy operation when reducing the counter weight easily controls, be applicable to all needing to carry out the construction of side bay cast-in-place section to the pier both sides.

Description

Anchor pulling type bracket device

Technical Field

The utility model relates to a cast-in-place construction technical field, especially a draw anchor formula bracket device of continuous beam side span.

Background

More and more bridges crossing rivers, rivers and valley cliff appear in the traffic construction process of China, the bridge with the bridge length and the pier height is mainly a multi-connection multi-span continuous beam (steel structure) structure, when the hanging irrigation hanging basket is adopted for construction, a plurality of cast-in-place structures still exist on the piers, and the construction of side-span cast-in-place sections by building the floor stand is very difficult due to complex terrain and terrain, crossing water areas and high piers.

In order to solve the above-mentioned not enough of falling to the ground support, adopt unsettled bracket to implement the construction of side span cast-in-place section at present, and use the sand bag to carry out the counter weight to unsettled bracket, but need transport a large amount of sand bags to the job site during construction and transport pier mound top again, construction cost has increased, especially when parallelly connected continuous beam is under construction, the construction of side span cast-in-place section all needs to be carried out to pier both sides, use the counter weight mode of sand bag, still need clear up the sand bag reduction counter weight of counter weight end when pouring the counter weight end, maintain the stress balance at unsettled bracket both ends, the engineering time is long and the operation is complicated.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: the anchor pulling type bracket device is simple in structure and good in economical efficiency, is fast to operate when the bracket is suspended for balancing weight, and is convenient for construction of side-span cast-in-place sections on two sides of the pier.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides a draw anchor formula bracket device, includes along following the unsettled bracket that runs through the pier in the direction of the bridge, unsettled bracket be used for with pier fixed connection, unsettled bracket is including being located respectively the cast-in-place end and the counter weight end of pier opposite side, the tensioning device has been placed to the counter weight end, tensioning device can be connected with the cushion cap anchor.

The utility model discloses a draw anchor formula bracket device, the holding surface of the cast-in-place section construction of limit stride is provided through unsettled bracket, tensioning equipment simple structure, occupation space is few, construction cost can be controlled, provide the counter weight for the counter weight end through carrying out simple stretch-draw operation to tensioning equipment, stage by stage stretch-draw can make tensioning equipment provide different counter weights moreover, the long problem of counter weight mode construction time of using conventional sand bag has been solved, tensioning equipment reduces the easy operation of counter weight and easily controls, be convenient for all need carry out the construction of the cast-in-place section of limit stride to the pier both sides.

Preferably, tensioning equipment includes jack and steel strand wires, the jack with the one end of steel strand wires is connected, the other end of steel strand wires is used for connecting with the cushion cap anchor, and the jack carries out the stretch-draw operation to the steel strand wires, and the tensioning force that the jack produced passes through tensioning equipment counteracts the counter weight end of bracket to provide the counter weight to the counter weight end, be used for balancing the partial force that cast-in-place end concreting's gravity caused, and the jack can reach the purpose that provides different counter weights to the counter weight end to the hierarchical stretch-draw of steel strand wires.

Preferably, the steel strand wires are sleeved with the PVC pipes on two sides of the top surface of the bearing platform, the steel strand wires on two sides of the top surface of the bearing platform comprise steel strand wires embedded into one part of the bearing platform and steel strand wires exposed out of one part of the top surface of the bearing platform, and the sleeved PVC pipes can prevent the exposed parts of the steel strand wires from being bonded with concrete when the bearing platform is poured.

Preferably, the height-adjusting device is placed on the suspended bracket, the height-adjusting device not only can provide a plane for placing the template, but also has the function of adjusting the height, and the construction requirements of the side-span cast-in-place sections with different heights can be met.

Preferably, the height-adjusting device includes wedge adjusting block, main beam and main longitudinal beam, the wedge adjusting block place in on the unsettled bracket, the main beam along horizontal bridge to placing in on the wedge adjusting block, the main longitudinal beam along following the bridge to placing in on the main beam, the main longitudinal beam is used for placing the template, and the wedge adjusting block is as the adjusting device of founding the mould elevation, and the main longitudinal beam is used for adjusting the template for unsettled bracket's the height of placing.

Preferably, the suspended bracket is a triangular bracket, the suspended bracket comprises a cross brace, a vertical brace and an inclined brace, two ends of the inclined brace are respectively connected with the cross brace and the vertical brace, a connecting point of the inclined brace and the vertical brace is a lower supporting point of the suspended bracket, a connecting point of the vertical brace and the cross brace is an upper supporting point of the suspended bracket, and when the triangular bracket structure provides a supporting surface, the use of self materials is saved, and the dead weight of the suspended bracket is reduced.

Preferably, the suspended bracket further comprises a steel pipe and a counter-pull rod, the steel pipe is pre-embedded in an upper fulcrum and a lower fulcrum of the suspended bracket respectively, the steel pipe penetrates through the bridge pier along the bridge direction, the counter-pull rod penetrates through the steel pipe and is connected with the cast-in-place end and the counterweight end, and the cast-in-place end and the counterweight end form a counter-pull structure which can mutually transmit stress.

Preferably, the lower fulcrum department of unsettled bracket still installs pre-buried steel box and bracket, pre-buried steel box symmetry is pre-buried the both sides of pier, pre-buried steel box end plate reservation has the mounting hole, the steel pipe passes the mounting hole, the bracket is located the below of pre-buried steel box, just the bracket with lower fulcrum fixed connection, pre-buried steel box has fixed unsettled bracket on the pier, and the bracket has increased unsettled bracket to the lifting surface area of pier, has guaranteed unsettled bracket and pier structure's stability.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the tensioning device has a simple structure, occupies a small space, can control the construction cost, is quick in counterweight operation, can flexibly adjust the counterweight, is simple and easy to control in counterweight reduction, and is convenient for construction of side-span cast-in-place sections on both sides of the pier;

2. the height adjusting device provides a plane for placing the side span cast-in-place section template, and can adjust the elevation of the vertical mold and the placing height of the template to ensure that the bottom of the poured side span beam can be placed on the pier top of the pier;

3. the suspended bracket is not limited by the construction terrain, and the counter-pulling structure designed by the suspended bracket ensures the counterweight effect of the tensioning device, so that the pier can not generate large eccentric stress and is stable in structure when the stress at the two ends of the suspended bracket is balanced.

Drawings

Fig. 1 is a schematic structural view of an anchor bracket device according to the present invention;

fig. 2 is a schematic view of a counterweight end structure of a pull anchor bracket device according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is a partial enlarged view of FIG. 1 at B;

the labels in the figure are: 1-suspended bracket, 11-cast-in-place end, 12-counterweight end, 13-embedded steel box, 14-steel pipe, 15-pair pull rod, 16-bracket, 2-tensioning device, 21-jack, 22-steel strand, 23-PVC pipe, 3-heightening device, 31-wedge-shaped adjusting block, 32-main beam, 33-main longitudinal beam, 4-bearing platform, 5-pier and 6-template.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description of the present invention is made with reference to the accompanying drawings and examples, and it should be understood that the specific examples described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.

Example 1

As shown in fig. 1-4, an anchor pulling type bracket device comprises a suspension bracket 1 penetrating through a bridge pier 5 along a bridge direction, wherein the suspension bracket 1 is used for being fixedly connected with the bridge pier 5, the suspension bracket 1 comprises a cast-in-place end 11 and a counterweight end 12 which are respectively positioned at the opposite sides of the bridge pier 5, a tensioning device 2 is placed on the counterweight end 12, and the tensioning device 2 can be in anchor connection with a bearing platform 4.

In this embodiment, the tensioning device 2 includes a jack 21 and steel strands 22, when the bearing platform 4 is constructed, the steel strands 22 with a nominal diameter of 15.2mm are pre-buried and firmly anchored with the bearing platform 4, four layers of anchored steel mesh sheets are arranged, the edge of the steel strand 22 closest to the bearing platform 4 is not less than 50cm, the embedding depth of the fixed end of the steel strand 22 is not less than 200cm relative to the top surface of the bearing platform 4, the exposed fixed end is not less than 50cm relative to the top surface of the bearing platform 4, and a part of the steel strand 22 on both sides of the top surface of the bearing platform 4 needs to be sleeved with a PVC pipe 23 with an inner diameter of 5cm and wound with an adhesive tape.

The suspended bracket 1 is a triangular bracket and comprises cross braces, vertical braces and inclined braces, the two ends of each inclined brace are respectively connected with the cross braces and the vertical braces, each rod piece of the suspended bracket 1 is designed to be connected with a pin shaft, the connection point of each inclined brace and the vertical brace is a lower support point of the suspended bracket 1, the connection point of each vertical brace and the cross brace is an upper support point of the suspended bracket 1, the suspended bracket 1 further comprises an embedded steel box 13, a steel pipe 14, a counter pull rod 15 and a bracket 16, the steel pipe 14 adopts a seamless steel pipe, the counter pull rod 15 adopts finish rolling deformed steel bar, the upper support point of the suspended bracket 1 adopts a counter pull structure with a reserved hole and matched with the counter pull rod 15, during pier body construction, the steel pipe 14 penetrating through the pier 5 is embedded in the pier body at the upper support point of the suspended bracket 1 along the bridge direction, the lower support structure combining the embedded steel box 13 and the bracket 16 is adopted at the lower support point of the suspended bracket 1, during pier body construction, the embedded steel boxes 13 are symmetrically placed at the two sides of the lower support point of the suspended bracket 1, the end plate reserves a mounting hole in the case, the preformed hole of both sides is by a pre-buried steel pipe 14 through connection, then when installing unsettled bracket 1, use contrast pole 15 to pass through steel pipe 14 with cast-in-place end 11 and counter weight end 12 anchor in the both sides of pier 5 in unsettled bracket 1's upper fulcrum and lower fulcrum department, directly place the member of unsettled bracket 1's lower fulcrum department in pre-buried steel case 13 internal fixation, and hug closely bracket 16 pier 5 and fix in unsettled bracket 1's lower fulcrum department, increase unsettled bracket 1 in the lower fulcrum department to the lifting surface area of pier 5, all built-in fittings location need the accuracy, the deviation of pre-buried position is no more than 5 mm.

Placed height-adjusting device 3 on cast-in-place end 11, height-adjusting device 3 includes wedge adjusting block 31, main beam 32 and main longitudinal beam 33, place wedge adjusting block 31 on cast-in-place end 11 and regard as the adjusting device of founding the mould elevation, wedge adjusting block 31 is last to be provided with the I-steel of shuangpin I45b as main beam 32 to the cross bridge, again according to the actual demand height of the cast-in-place section of sidespan, place the I-steel or the bailey roof beam of corresponding height dimension on main beam 32 as main longitudinal beam 33, install the template 6 of the cast-in-place section of sidespan on main longitudinal beam 33, and the ligature reinforcing bar is fixed this template 6.

Calculating the gravity center position of the stress of the cast-in-place end 11, placing a double I-shaped steel I45b as an operation platform at the position of the counterweight end 12 which is symmetrical to the gravity center relative to the pier 5, arranging four anchoring points on the operation platform for placing jacks 21, selecting hydraulic jacks as the jacks 21, connecting the steel stranded wires 22 pre-embedded in the bearing platform 4 with the jacks 21, using anchors for limiting and constraining, calculating the stress conditions of the four anchoring points according to the structural form of the cross section of the cast-in-place beam, obtaining the total loading amount of the jacks 21 at the four anchoring points, calculating the number of the steel stranded wires 22 according to the total loading amount of each anchoring point, and finally, when a side span cast-in-place section is poured, providing counterweight for the counterweight end 12 by adopting a mode that the jacks 21 pull the steel stranded wires 22 in stages to balance the deflection force caused by the gravity of the concrete poured in the cast-in-place end 11, basically keeping the stress balance of the suspended bracket 1, the smooth completion of the construction of the side span cast-in-place section of the cast-in-place end 11 is ensured.

Example 2

As shown in fig. 1 to 4, in the construction of the parallel continuous beam, both sides of the pier 5 need to be constructed in the side span cast-in-place section, after the side span beam of the cast-in-place end 11 is poured as in example 1, the counterweight end 12 also needs to be constructed at the side span cast-in-place section, the same operation as that of the cast-in-place end 11 is carried out on the counterweight end 12, the height-adjusting device 3 with the corresponding height is placed, and the template 6 of the side-span cast-in-place section is installed and fixed, at the moment, the jack 21 is positioned below the template 6 of the side-span cast-in-place section, when the concrete is poured gradually at the counterweight end 12, the tension of the jack 21 to the steel strand 22 is adjusted in stages to reduce the counterweight at the counterweight end 11, so that the stress of the cast-in-place end 11 and the stress of the counterweight end 12 are basically consistent, the stress balance of the suspended bracket 1 is basically kept, after the pouring of the side span beam at the counterweight end 12 is completed, the balance weight provided by the tensioning device 2 is cancelled, and the smooth completion of the construction of the side span cast-in-place section of the balance weight end 12 is ensured.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a draw anchor formula bracket device, includes along unsettled bracket (1) that runs through pier (5) in the same direction as the bridge, unsettled bracket (1) be used for with pier (5) fixed connection, unsettled bracket (1) is including being located respectively cast-in-place end (11) and counter weight end (12) of pier opposite side, its characterized in that, tensioning equipment (2) have been placed on counter weight end (12), tensioning equipment (2) can be connected with cushion cap (4) anchor.

2. A pull-anchor bracket assembly according to claim 1, wherein the tensioning means (2) comprises a jack (21) and a steel strand (22), the jack (21) being connected to one end of the steel strand (22), the other end of the steel strand (22) being adapted for anchoring connection to the bearing platform (4).

3. A pull anchor bracket device according to claim 2, characterized in that the steel strands (22) are jacketed with PVC pipes (23) on both sides of the top surface of the platform (4).

4. A pull-anchor bracket assembly according to claim 1, characterized in that a height-adjustment means (3) is placed on the suspended bracket (1).

5. A pull-anchor bracket device according to claim 4, characterized in that the height-adjusting device (3) comprises a wedge-shaped adjusting block (31), a main cross beam (32) and a main longitudinal beam (33), the wedge-shaped adjusting block (31) is placed on the suspension bracket (1), the main cross beam (32) is placed on the wedge-shaped adjusting block (31) along the transverse bridge direction, the main longitudinal beam (33) is placed on the main cross beam (32) along the bridge direction, and the main longitudinal beam (33) is used for placing the template (6).

6. A pull anchor bracket device according to claim 1, wherein the suspension bracket (1) is a triangular bracket, the suspension bracket (1) comprises a cross brace, a vertical brace and a diagonal brace, and two ends of the diagonal brace are respectively connected with the cross brace and the vertical brace.

7. The anchor-pulling type bracket device according to claim 6, wherein the suspension bracket (1) further comprises a steel pipe (14) and a counter-pull rod (15), the steel pipe (14) is pre-embedded at the upper fulcrum and the lower fulcrum of the suspension bracket (1), the steel pipe (14) penetrates through the pier (5) along the bridge direction, and the counter-pull rod (15) penetrates through the steel pipe (14) and is connected with the cast-in-situ end (11) and the counterweight end (12).

8. The anchor pulling type bracket device according to claim 7, wherein an embedded steel box (13) and a bracket (16) are further installed at the lower fulcrum of the suspension bracket (1), the embedded steel box (13) is symmetrically embedded at two sides of the pier (5), an installation hole is reserved in an end plate of the embedded steel box (13), the steel pipe (14) penetrates through the installation hole, the bracket (16) is located below the embedded steel box (13), and the bracket (16) is fixedly connected with the lower fulcrum of the suspension bracket (1).