CN114561873A - Bridge high pier construction method - Google Patents

Abstract

The invention discloses a construction method for a high pier of a bridge, comprising the following specific steps: 1) construction of a cap; 2) construction of steel bars for a pier column; 3) construction of a pier column formwork; 4) pouring construction; 5) pier column maintenance. In the present invention, the main reinforcement of the pier column is connected with the steel pipe frame by a telescopic rod, which prevents the steel bar from floating up when the cap is poured, and improves the construction accuracy of the pre-buried main reinforcement of the pier column; the upper reinforcement cage is temporarily welded and fixed by the fixing frame, and the fixing frame is provided Bracket rib, the bracket rib is arranged on the upper part of the welding seam, one end of the telescopic rod is connected with the hoop ear plate, the hoop ear plate and the hoop body provide a temporary working platform for the welding construction of the reinforcement cage, and reduce the welding time of the upper reinforcement cage. Difficulty in construction; the tie beam hoop formwork support system and the steel formwork self-stabilizing system are set on the pier column, and the formwork construction is convenient and fast; when the concrete is poured in stages, the cold joint formwork is used, and the overfilled concrete is recovered from the leakage hole, reducing the Cold seam chiseling construction.

Description

Bridge high pier construction method

technical field

The invention relates to a construction method for high piers of bridges, which is mainly suitable for the construction of high piers of urban viaducts.

Background technique

With the advancement of urbanization, the development of cities is inseparable from highways and bridges, which has promoted the improvement of the construction level of highways and bridges. The increase of vehicles has put forward higher requirements for the quality of highway bridges, and to a certain extent, the construction of high piers of highway bridges has become more difficult. Doing a good job in the construction of high piers has become the top priority of ensuring the quality of the project.

The construction of high piers is an important construction content of highway bridges. The construction will encounter the following construction problems: (1) The anti-floating effect of the pre-embedded reinforcement of the pier column during the pouring construction of the cap, resulting in inaccurate positioning of the main reinforcement of the pier column; (2) The vase pier Inaccurate control of formwork; (3) temporary stabilization problem during temporary welding of upper reinforcement cage; (4) cold seam treatment construction; (5) high pier spray health construction.

In view of this, in view of a series of problems in the construction of high piers, it is urgent to invent a simple and effective bridge high pier structure to meet the quality control requirements of high pier construction, especially for urban elevated high pier construction, which can significantly save construction costs and speed up Advantages of construction progress.

SUMMARY OF THE INVENTION

The purpose of the present invention is to meet the quality control requirements of high pier construction, especially for urban elevated high pier construction, it has the advantages of significantly saving construction costs and accelerating construction progress.

For realizing the above-mentioned technical purpose, the present invention has adopted the following technical solutions:

A method for constructing a high pier of a bridge, comprising the following specific steps:

1) Construction of the cap; The main reinforcement is fixed with steel wire, and the outermost main reinforcement of the pier column is connected with the steel pipe frame by connecting the telescopic rotating rod, and then the cap is poured. ;

2) Reinforcing construction of the pier column; hoist the upper reinforcement cage to the position where it is connected to the pre-buried main reinforcement at the bottom of the pier column by hoisting tools, and temporarily weld and fix it through the fixing frame, and then connect the main reinforcement on the upper reinforcement cage to the pre-buried main reinforcement at the bottom of the pier column one by one. The main reinforcement is welded, and the fixing frame is removed after the welding is completed;

3) Construction of pier and column formwork; steel formwork is installed on the outer side of the upper reinforcement cage, the steel formwork is assembled and formed by the first pair of bolts, the steel formwork system on both sides is fixed by the second pair of bolts, and the tie beam hoop is set at the tie beam template;

4) Pouring construction; install cold seam formwork before pouring cold seam, cold seam formwork is installed on steel formwork, cold seam formwork is composed of formwork body and grout leakage formwork, and grout leakage hole is set on grout leakage formwork;

5) Maintenance of the pier column; the pier column is set with maintenance equipment after demoulding, and the two sides of the maintenance equipment are connected with the rope drum with steel wire ropes. Roller skating is set on the maintenance frame, the wire rope goes around the pulley, a water collecting ditch is set under the pier column, and the anti-seepage cloth is laid in the water collecting ditch.

2. The method for constructing high bridge piers according to claim 1, wherein in step 1), one end of the connecting telescopic rotating rod is connected to the main reinforcement of the pier column, and the other end is connected to the steel pipe frame through the connecting fastener.

Preferably, in step 2), pre-embedded fixtures are arranged around the hoisting site, the upper-layer reinforcement cage is connected to the surrounding pre-embedded fixtures through cable wind ropes, chain hoists are set on the cable wind ropes, and each The length of the cable wind rope to control the position of the upper reinforcement cage.

Preferably, in step 2), when the upper reinforcement cage is hoisted, a laser locator is installed on the upper reinforcement cage, and the position of the upper reinforcement cage is detected by the laser locator to assist in controlling the position of the upper reinforcement cage.

Preferably, in step 2), the fixing frame includes a hoop body and a telescopic rod, a number of bracket ribs are provided on the inside of the hoop body, and a number of hoop ear plates are provided on the outside of the hoop body, and one end of the telescopic rod is connected to the hoop ear When the upper reinforcement cage is temporarily welded and fixed by the fixing frame, the upper reinforcement cage is hoisted into the fixing frame, and the upper reinforcement cage is supported by the bracket bars on the hoop body. The bracket bars and the upper reinforcement cage are temporarily welded and fixed; the fixed height of the upper reinforcement cage is adjusted by adjusting the height of the telescopic rod, so that the main reinforcement on the upper reinforcement cage and the embedded main reinforcement at the bottom of the pier column are aligned one by one.

Preferably, the hoop body is composed of two halves, one end of the two halves is hinged, the other end of the two halves is provided with a hoop connection port, and the hoop on the two halves is connected The ports can be connected by bolts.

Preferably, in step 5), the steel formwork is provided with a connecting plate, and the steel formwork and the cold seam formwork are connected by bolts.

Preferably, in step 5), anti-skid patterns and reinforcing plates are arranged on the slurry leakage template.

The present invention has the following characteristics and beneficial effects:

1. The main reinforcement of the pier column is connected with the steel pipe frame by a telescopic rod, which prevents the reinforcement from floating up when the cap is poured, and improves the construction accuracy of the pre-buried main reinforcement of the pier column.

2. The upper reinforcement cage is temporarily welded and fixed by the fixing frame. The fixing frame is provided with bracket ribs. The bracket ribs are arranged on the upper part of the welding seam. One end of the telescopic rod is connected with the hoop ear plate. The hoop ear plate and the hoop body are steel bars. The cage welding construction provides a temporary working platform, which reduces the construction difficulty of the upper reinforcement cage welding.

3. The tie beam and hoop formwork support system and the steel formwork self-stabilizing system are set on the pier column, and the formwork construction is convenient and fast.

4. The cold joint formwork is used when the concrete is poured in stages, and the overfilled concrete is recovered from the slurry leakage hole to reduce the cold joint chiseling construction.

5. After the pier column is demolded, the maintenance equipment is set to realize the intelligent maintenance of the pier column.

Description of drawings

Fig. 1 is the schematic diagram of pier column formwork pair pulling of the present invention;

Figure 2 is a schematic diagram of the hoisting of the upper reinforcement cage;

Figure 3 is a schematic diagram of the temporary fixation of the upper reinforcement cage welding;

Fig. 4 is the structural representation of the fixing frame;

Fig. 5 is the structural representation of cold seam formwork;

Figure 6 is a schematic diagram of the temporary fixing of the reinforcing steel structure of the cap;

Figure 7 is a schematic diagram of the pier column maintenance equipment.

Among them: 1. Bearing platform, 2. The first bolt of the pair, 3. The second bolt of the pair, 4. The beam hoop formwork, 5. The steel formwork, 6. The lifting tool, 7. The steel rope, 8. The cable wind Rope, 9. Chain hoist, 10. Embedded fixture, 11. Laser locator, 12. Hoisting reinforcement, 13. Upper reinforcement cage, 14. Hoop connection position, 15. Hoop ear plate, 16. Telescopic Rod, 17. Pre-embedded main reinforcement at the bottom of pier column, 18. Welding seam, 19. Hoop body, 20. Hoop reinforcement, 21. Hoop connection port, 22. Bracket reinforcement, 23. Anti-skid pattern, 24. Reinforcing plate, 25. Formwork body, 26. Bolt connection, 27. Connecting plate, 28. Slurry hole, 29. Pulley, 30. Steel wire rope, 31. Rope drum, 32. Motor, 33. Ditch, 34. Anti-seepage cloth, 38. Maintenance equipment, 39. Steel pipe connection fasteners, 40. Steel pipe frame, 41. Connecting bars, 42. Main reinforcement of caps, 43. Main reinforcement of pier columns, 44. Connecting telescopic rods, 45. Pier columns, 46. Fixed frame , 47. Steel wire, 48. Tie beam, 49. Cold joint formwork, 50. Slurry formwork, 51. Curing frame, 52. Concrete.

Detailed ways

Example 1

The high pier structure of the bridge includes a cap 1, a pier column 45, an upper reinforcement cage 13, a steel formwork 5, a maintenance equipment 38, an upper reinforcement cage 13, a fixing frame 46, etc., as well as a reinforcement frame positioning device, a hoisting positioning device, Pier maintenance sprinkler system.

As shown in FIG. 6 , after the main bars 42 of the cap, the connecting bars 41 and the main bars 43 of the pier columns are bound, the main bars 43 of the adjacent pier columns are connected and fixed with steel wires 47 , and the main bars 43 of the pier columns are arranged vertically. 43 is fixed by the steel frame positioning device. Specifically, the reinforcing steel frame positioning device includes a steel pipe frame 40 arranged around the bearing platform 1 and a connecting telescopic rotating rod 44 . Specifically, one end of the connecting telescopic rotating rod 44 is connected to the main bar 43 of the pier column. Since the outermost pier column main rib 43 is connected to the steel pipe frame 40 by connecting the telescopic rotating rod 44, the pier main rib 42, the connecting rib 41, and the pier column main rib 43 are fixed, and then the pier is poured. After the pier is poured, the pier The part of the column main reinforcement 43 protruding from the cap forms the pre-embedded main reinforcement 17 at the bottom of the pier column. The main reinforcement of the pier column is connected with the steel pipe frame 10 by the connecting telescopic rotating rod 44, which prevents the reinforcement from floating up when the cap is poured, and improves the construction accuracy of the pre-buried main reinforcement of the pier column.

As shown in FIG. 2 , the upper reinforcement cage 13 is hoisted with a hoisting tool 6, and the steel rope 7 is connected to the hoisting reinforcement 12 and the hoisting tool 6 arranged on the upper reinforcement cage 13, and the upper reinforcement cage 13 is accurately hoisted by the hoisting positioning device, The hoisting and positioning device includes pre-embedded fixtures 10 arranged around the hoisting site. The upper reinforcement cage 13 is connected to the surrounding pre-embedded fixtures 10 through cable wind ropes 8 , on which a manual hoist 9 is arranged. During hoisting, a laser locator 11 is installed on the upper reinforcement cage 13 , the laser locator 11 is the prior art, and the laser locator 11 is used to detect the position of the upper reinforcement cage 13 . Wherein, the hoisting tool 6 may be a crane, a crane, or the like. A stirrup 20 is arranged around the outer side of the upper reinforcement cage 13 .

As shown in FIGS. 3 and 4 , the fixing frame 46 includes a hoop body 19 and a telescopic rod 16. The inner side of the hoop body 19 is provided with a bracket rib 22, and the outer side of the hoop body 19 is provided with a number of hoop ear plates 15. One end of the rod 16 is connected with the hoop ear plate 15 , and the other end is fixed on the platform 1 . The upper reinforcement cage 13 is temporarily welded and fixed by the fixing frame 46 during hoisting, and the main reinforcement on the upper reinforcement cage 13 is welded to the pre-embedded main reinforcement 17 at the bottom of the pier column one by one. The connection between the upper reinforcement cage 13 and the pre-embedded main reinforcement 17 at the bottom of the pier column Welds 18 are formed. The bracket rib 22 is arranged on the upper part of the welding seam 18 .

Among them, the hoop body 19 is composed of two halves, one end of the two halves is hinged at the hoop connection position 14, the other ends of the two halves are provided with hoop connection ports 21, and the two halves are The hoop connection port 21 on the body can be connected by bolts.

As shown in FIG. 1 , the steel formwork 5 is assembled by pulling the first bolts 2 to form a steel formwork assembly, and the steel formwork assemblies on both sides are connected and fixed with the second pulling bolts 3 , and the tie beam 48 is provided with a tie beam hoop The formwork 4, the tie beam hoop formwork 4 is arranged between the two steel formwork assemblies.

As shown in FIG. 5 , the steel formwork 5 and the cold seam formwork 49 are connected by bolts 27, the cold seam formwork 49 is connected above the steel formwork 5, the steel formwork 5 is provided with a connecting plate 7, and the cold seam formwork 49 is composed of the formwork body 25 and the leakage slurry. The template 50 is composed of a slurry leakage template 50 with a slurry leakage hole 28, and an anti-skid pattern 23 and a reinforcing plate 24 on the slurry leakage template.

As shown in FIG. 7 , the pier column 45 is provided with a pier column maintenance spray system after demoulding, and the pier column maintenance spray system includes a maintenance device 38. Specifically, the maintenance device 38 is a work platform, and the middle of the work platform is provided with a Through slot, the pier 45 passes through the through slot. The two sides of the maintenance equipment 38 are connected with the rope drums 31 by the wire ropes 30. The rope drums 31 are located on both sides of the pier column. The rope drum 31 is provided with a motor 32. , the wire rope 30 goes around the pulley 29, and a water collecting ditch 33 is set under the pier column 45, and the water collecting ditch 33 is covered with an anti-seepage cloth 34. In this solution, the water collecting ditch 33 is arranged on both sides of the pier 45 . The rope drum 31 is driven to rotate by the motor 32 to realize the retraction and release of the wire rope, thereby realizing the lifting and lowering of the maintenance equipment 38 .

Embodiment 2

A construction method for a high pier structure of a bridge, comprising the following steps:

(1) Construction of the cap; before the cap is poured, the steel pipe frame 40 is arranged around the pouring position of the cap 1, and then the main reinforcement 42 and the connecting reinforcement 41 of the cap are bound, and the main reinforcement 42 and the connecting reinforcement 41 of the cap are carried out in a criss-cross manner. Binding, after binding, the cap frame is obtained, and the main bars 43 of the pier columns are bound on the cap frame, and the main bars 43 of the pier columns are fixed with steel wires 47. One end of the connecting telescopic rotating rod 44 is connected with the main rib 43 of the pier column, and the other end is connected with the steel pipe frame 40 through the connecting fastener 39; then the cap is poured. The main reinforcement 17 is pre-buried at the bottom of the column.

(2) Construction of pier and column reinforcement; the construction of the upper reinforcement cage 13 is controlled by the hoisting tool 6 in conjunction with the cable wind rope 8; the pre-embedded fixtures 10 are arranged around the hoisting site, and the upper reinforcement cage 13 passes through the cable wind rope 8 and the surrounding pre-buried The fixing parts 10 are connected together, and a chain hoist 9 is set on the cable wind rope 8, and the length of each cable wind rope 8 is adjusted by the hand chain hoist 9, so as to control the position of the upper reinforcement cage 13; a laser locator is installed on the upper reinforcement cage 13 11. With the aid of the laser locator 11 for positioning, the fixing frame 46 is used for temporary welding and fixing. The fixing frame 46 is provided with a hoop body 19 and a bracket rib 22. On the inner side, one end of the telescopic rod 16 is connected with the hoop ear plate 15 on the hoop body 19; when the upper reinforcement cage 13 is temporarily welded and fixed by the fixing frame 46, the upper reinforcement cage 13 is hoisted to the fixing frame 46. The bracket ribs 22 on the hoop body 19 hold the upper reinforcement cage 13 and temporarily weld and fix the bracket reinforcement 22 and the upper reinforcement cage 13; The main bars on the cage 13 are aligned with the pre-embedded main bars 17 at the bottom of the pier column one by one, and the main bars on the upper reinforcement cage 13 are welded to the pre-embedded main bars 17 at the bottom of the pier column one by one, and then the fixing frame 46 is removed.

(3) Construction of pier and column formwork; steel formwork 5 is installed on the outer side of the upper reinforcement cage 13, and the steel formwork 5 is assembled and formed by pulling the first bolts 2, and the steel formwork system on both sides is fixed by the second pulling bolts 2. The tie beam hoop formwork 4 is set at 48 places. The upper reinforcement cage 13 is located in the steel formwork 5 .

(4) pouring construction; install cold seam formwork before cold seam pouring, steel formwork 5 and cold seam formwork 49 are connected with bolts 27, cold seam formwork 49 is installed on steel formwork 5, steel formwork 5 is provided with connecting plate 7, cold seam formwork 49 is composed of the template body 25 and the slurry leakage template 50, the slurry leakage hole 28 is provided on the slurry leakage template 50, and the anti-skid pattern 23 and the reinforcement plate 24 are arranged on the slurry leakage template;

(5) Maintenance of the pier column; the pier column 45 is provided with maintenance equipment 38 after demoulding, and the two sides of the maintenance equipment 38 are connected with the rope drum 31 by the wire rope 30. The motor 32 is set, the maintenance frame 51 is set around the pier column 45, the roller skating 29 is set on the maintenance frame 51, the wire rope 30 goes around the pulley 29, the water collecting ditch 33 is set under the pier column 45, and the anti-seepage cloth 34 is laid in the water collecting ditch 33 .

Claims (8)

1. a construction method for high piers of bridges, is characterized in that, comprises the following concrete steps: 1) Construction of the cap; before the cap is poured, a steel pipe frame (40) is arranged around the pouring position of the cap (1), and then the main reinforcement (42) and the connecting bar (41) of the cap are bound, and the cap frame is obtained after binding, and The main reinforcement (43) of the pier column is bound on the cap frame, and the main reinforcement of the pier column (43) is fixed with a steel wire (47). ) connection, and then pouring the cap, after pouring, the part of the main reinforcement of the pier column (43) protruding from the cap to form the main reinforcement (17) embedded at the bottom of the pier column; 2) Construction of steel reinforcement for pier columns; the upper reinforcement cage (13) is hoisted to the position where it is connected with the pre-embedded main reinforcement (17) at the bottom of the pier column by means of a hoisting tool (6), and is temporarily welded and fixed by the fixing frame (46), and then the upper reinforcement cage (13) is hoisted. The main reinforcement on the reinforcement cage (13) is welded to the pre-embedded main reinforcement (17) at the bottom of the pier column one by one, and the fixing frame (46) is removed after the welding is completed; 3) Construction of pier and column formwork; steel formwork (5) is installed on the outer side of the upper reinforcement cage (13), the steel formwork (5) is assembled and formed by the first bolt (2), and the second bolt (2) is used to make the two The side steel formwork system is fixed, and the tie beam hoop formwork (4) is set at the tie beam (48); 4) Pouring construction; install the cold seam formwork (49) before the cold seam is poured, the cold seam formwork (49) is installed on the steel formwork (5), and the cold seam formwork (49) consists of the formwork body (25) and the slurry leakage formwork (50). ), and a slurry leakage hole (28) is arranged on the slurry leakage template (50); 5) Maintenance of the pier column; the pier column (45) is provided with a maintenance device (38) after demoulding, and the two sides of the maintenance device (38) are connected with the rope drum (31) by the wire rope (30), and the rope drum (31) is arranged in the On both sides of the pier column (45), a motor (32) is arranged on the rope drum (31), a maintenance frame (51) is arranged around the pier column (45), a roller skate (29) is arranged on the maintenance frame (51), and the steel wire rope (30) ) bypasses the pulley (29), sets a water collecting ditch (33) under the pier (45), and lays an anti-seepage cloth (34) in the water collecting ditch (33). 2. The method for constructing a high bridge pier according to claim 1, characterized in that, in step 1), one end of the connecting telescopic rotating rod (44) is connected with the main reinforcement (43) of the pier column, and the other end is connected by a connecting fastener (39) It is connected with the steel pipe frame (40). 3. bridge high pier construction method according to claim 1, is characterized in that, in step 2), in the surrounding of hoisting site, pre-embedded fixtures (10) are arranged, and the upper reinforcement cage (13) passes through the cable wind rope (8). ) is connected with the surrounding pre-embedded fixing parts (10), and a chain hoist (9) is arranged on the cable wind rope (8). The cage (13) is position-controlled. 4. The method for constructing a high pier of a bridge according to claim 1, wherein in step (2), when the upper reinforcement cage (13) is hoisted, a laser locator is installed on the upper reinforcement cage (13). (11), the position of the upper reinforcement cage (13) is detected by the laser locator (11), so as to assist in controlling the position of the upper reinforcement cage (13). 5. The method for constructing high bridge piers according to claim 1, wherein in step 2), the fixing frame (46) comprises a hoop body (19), a telescopic rod (16), and the inner side of the hoop body (19) A plurality of bracket ribs (22) are provided, and a plurality of hoop ear plates (15) are arranged on the outer side of the hoop body (19). One end of the telescopic rod (16) is connected with the hoop ear plate (15), and the other end is fixed on on the bearing platform (1); when temporarily welding and fixing the upper reinforcement cage (13) through the fixing frame (46), the upper reinforcement cage (13) is hoisted into the fixing frame (46), and the hoop body (19) The upper bracket rib (22) supports the upper reinforcement cage (13) and temporarily welds the bracket reinforcement (22) to the upper reinforcement cage (13); adjust the upper reinforcement cage (13) by adjusting the height of the telescopic rod (16). 13), so that the main reinforcement on the upper reinforcement cage (13) is aligned with the pre-embedded main reinforcement (17) at the bottom of the pier column. 6. The method for constructing high bridge piers according to claim 5, wherein the hoop body (19) is composed of two halves, one end of the two halves is hinged, and the other half of the two halves is hinged. One end is provided with a hoop connection port (21), and the hoop connection ports (21) on the two halves are connected by bolts. 7. The method for constructing a high pier of a bridge according to claim 1, wherein in step 5), the steel formwork (5) is provided with a connecting plate (7), between the steel formwork (5) and the cold seam formwork (49) Connect with bolts (27). 8. The method for constructing high bridge piers according to claim 1, characterized in that, in step (5), anti-skid patterns (23) and reinforcing plates (24) are arranged on the slurry leakage formwork.

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