CN111305192A

CN111305192A - Bridge pile foundation reinforcement cage positioning combined clamp and construction and use method thereof

Info

Publication number: CN111305192A
Application number: CN202010185949.9A
Authority: CN
Inventors: 曾守仙; 寇从宝; 刘习生; 徐先达; 岳崇; 赵挺
Original assignee: Shanghai Civil Engineering Co Ltd of CREC; Huahai Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Current assignee: Shanghai Civil Engineering Co Ltd of CREC; Huahai Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-06-19
Also published as: CN112554175A

Abstract

The invention relates to a bridge pile foundation reinforcement cage positioning combined clamp and a construction and use method thereof, compared with the prior art, the invention mainly has the following advantages: the steel reinforcement cage can be accurately positioned, and the error is ensured to be within the allowable range of design and specification; can effectually prevent the steel reinforcement cage come-up, guarantee to pour steel reinforcement cage length in the bored pile after accomplishing, adopt the circulation to hang the muscle, firstly reduce the waste of raw and other materials, secondly reduce the later stage pile head intercepting degree of difficulty, guarantee that the pile head can wholly encircle and cut the hoist and mount.

Description

Bridge pile foundation reinforcement cage positioning combined clamp and construction and use method thereof

Technical field ]

The invention relates to the field of construction of drilled piles of bridges, in particular to a combined clamp integrating positioning of a reinforcement cage of a bridge pile foundation, prevention of upward floating of the reinforcement cage and cyclic hanging of reinforcements and a construction and use method of the combined clamp.

Background art ]

At present, in the construction process of a bridge pile foundation, particularly in the construction of a bridge bored pile, the centering of a steel reinforcement cage is difficult to be effectively controlled, no good control measures exist, the positioning accuracy of the steel reinforcement cage of the bored pile cannot be ensured, and the error tolerance range can be exceeded; secondly, the reinforcement cage floats upwards in the pouring process, so that the effective length of the reinforcement cage cannot be guaranteed to be within a design allowable deviation range; thirdly, the intercepting convenience of the drilling pile head at the later stage of service cannot be realized, and the integral hoisting of the pile head cannot be well carried out.

Summary of the invention

The method is specially used for the construction of the drilled pile of the bridge, and can ensure the positioning accuracy of the steel reinforcement cage of the drilled pile so as to meet the requirement that the error allowable range is not exceeded and ensure that the thickness of the concrete protection layer of the drilled pile meets the design requirement; secondly, the steel reinforcement cage is prevented from floating upwards in the pouring process, and the effective length of the steel reinforcement cage is ensured to be within the design allowable deviation range; thirdly, in order to serve the intercepting convenience of the drilling pile head in the later stage, can not be because of the influence of hanging the muscle, and the integral hoisting of carrying out the pile head that can't be fine.

In order to achieve the purpose, the design scheme adopted by the invention comprises a hook head bolt, a protective cylinder, a positioning support frame, a circulating lifting rib and a reinforcement cage, wherein the lower part of the hook head bolt is connected with the protective cylinder, and the upper part of the hook head bolt is connected with the positioning support frame to form a support counterforce system; the lower part of the circular hanging rib is connected with the steel reinforcement cage, and the upper part of the circular hanging rib is connected with the positioning support frame through a buckle to form a positioning support system.

Further, the location supporting rack includes locating rack and supporting rack, the locating rack is by five root phi 10mm round steel welded connection, the supporting rack comprises 2 channel-section steels of 1.8m, 4 gib head bolts and 25 cm thickening steel pipes.

Furthermore, the hook bolt is formed by processing a phi 20 steel bar, the thread length of the bolt is 10cm, and the length of the straight section is 20 cm.

The jacket is integrally machined, a steel hinge with the thickness of 2cm is arranged in the middle of the jacket, a hole with the diameter of 30cm is formed in the middle of the jacket, and the jacket is placed on the upper portion of the positioning support frame, so that the jacket is prevented from colliding with a lower clamp structure.

Further, the circulation is hung the muscle and is become by 2 diameters 25mm, length for 3 m's reinforcing bar group, the reinforcing bar both ends all weld the steel sheet that a 2cm is thick, adopt 2U type cards to connect between the reinforcing bar.

The invention also relates to a construction and use method of the bridge pile foundation reinforcement cage positioning combined fixture, which comprises the following steps:

s1, welding a circle of steel plate with the thickness of 5mm at the position 20cm below the top of the pile casing;

s2, placing two positioning support frames at two sides of the protective cylinder, placing connecting ribs at two ends of the protective cylinder, and inserting and fixing hook head bolts;

and S3, lowering the reinforcement cage with the top removed.

S4, inserting a steel pipe on the supporting frame, simultaneously placing a positioning frame, centering with the cross lines on the two sides of the protective cylinder, and finely adjusting to ensure the accuracy of positioning the position of the supporting frame;

s5, calculating the length of the hanging rib, splicing the circulating hanging rib, connecting the spliced circulating hanging rib with the top reinforcement cage, and lowering the top of the reinforcement cage;

s6, putting a jacket, splicing the guide pipes, performing secondary cleaning, and pouring concrete;

and S7, when concrete is poured to the position of the hanging rib, removing 2 supporting steel pipes, removing the circulating hanging rib, and after the concrete is poured, removing the rest parts of the combined clamp.

Compared with the prior art, the invention has the following advantages:

1. the steel reinforcement cage can be accurately positioned, and the error is ensured to be within the allowable range of design and specification;

2. can effectually prevent steel reinforcement cage come-up, guarantee to pour steel reinforcement cage length in the bored pile after accomplishing.

3. Adopt the circulation to hang the muscle, firstly reduce the waste of raw and other materials, secondly reduce the later stage pile head intercepting degree of difficulty, guarantee that the pile head can wholly encircle and cut hoist and mount.

Description of the drawings

FIG. 1 is a structural view of a steel reinforcement cage positioning fixture;

1 connecting rib, 2 hook bolts, 3 circulating lifting ribs, 4 positioning support frames and 5 jacket

FIG. 2 is a view of a connector bar;

1 connecting bar

FIG. 3 is a view showing a hook bolt assembly;

2-1 common phi 20 steel bar and 2-2 common phi 16 nut

FIG. 4 is a structural diagram of the circular hanging bar;

3-1 common phi 25 steel bar, 3-2U-shaped buckle and 3-32 cm thick steel plate

FIG. 5 is a block diagram of an embodiment of a positioning support;

4-1 common 14# channel steel, 4-2 socket slots and 4-3 positioning square frame

FIG. 6 is a block diagram of a preferred embodiment of a positioning support;

5-1 common 14# channel steel, 5-2 common phi 20 steel bars, 5-36 cm thick square steel and 5-4 common 2cm thick steel plate

FIG. 7 is a plan view of the use state;

fig. 8 is a use state elevation view.

[ detailed description of the invention ]

For purposes of clarity, the principles and construction of the present invention, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and examples, which are believed to be clear to those skilled in the art. And the scope of the present disclosure is not limited to the specific embodiments illustrated, and any equivalent alternatives fall within the scope of the present disclosure.

The first embodiment is as follows:

the steel reinforcement cage positioning combined clamp mainly comprises four parts, which are respectively: the positioning support frame, the jacket, the circulating hanging ribs and the hook head bolts are combined as shown in figure 1.

The hook bolt is formed by processing a phi 20 steel bar, the length of the lathed wire is 10cm, and the length of the straight section is 20cm, as shown in figure 2.

The jacket is integrally processed, the middle hinge is processed by a steel plate with the thickness of 2cm, and the diameter of the opening is 30cm, as shown in figure 3.

The muscle is hung in the circulation adopts 2 diameters to be 25mm, length to be 3 m's reinforcing bar constitution, and reinforcing bar one end all welds the steel sheet that a 2cm is thick, directly adopts 2U type card connections between two reinforcing bars, as shown in figure 4.

The location supporting rack comprises locating rack and supporting rack, the locating rack comprises five root diameter 10mm round steel, adopts the welded mode to connect, and the supporting rack comprises 2 channel-section steels of 1.8m, 4 gib head bolts and 2 thickening steel pipes of 5cm, as shown in fig. 5, 6.

Example 2: the height control device for the copper terminal for the integral ballast bed construction of urban rail transit is structurally composed.

As shown in fig. 7 and 8, the installation method of the structure of the copper terminal height control device for the urban rail transit monolithic roadbed construction comprises the following steps:

1. firstly, welding a circle of steel plate with the thickness of 5mm at the position 20cm below the top of the pile casing;

2. two support frames (4-1) are placed at two sides of the protective cylinder, connecting ribs (1) are placed at two ends, hook head bolts (2-1) are inserted and fixed at the same time, and nuts (2-2) are screwed tightly;

3. and (5) lowering the reinforcement cage with the top removed.

4. Inserting a steel pipe into the support frame, simultaneously placing a positioning frame (4-3) into the support frame, aligning the positioning frame with cross lines on two sides of the protective cylinder, and finely adjusting to ensure the accuracy of the position of the support frame;

5. calculating the length of the hanging bar, splicing the circulating hanging bar (3-1/3-3), fixing a U-shaped buckle (3-2), connecting the spliced hanging bar with the top reinforcement cage, and lowering the top reinforcement cage;

6. placing a jacket, splicing the guide pipes, performing secondary cleaning, and pouring concrete;

7. and when the concrete is poured to the position of the hanging rib, removing 2 supporting steel pipes, removing the circulating hanging rib, and finally removing the rest parts after the concrete is poured.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a bridge pile foundation steel reinforcement cage location combination fixture which characterized in that includes:

the device comprises a hook head bolt, a connecting rib, a protective barrel, a positioning support frame, a circulating hanging rib and a reinforcement cage, wherein the lower part of the hook head bolt is connected with the protective barrel, and the upper part of the hook head bolt is connected with the positioning support frame and is connected with the positioning support frame through the connecting rib to form a support counter-force system; the lower part of the circular hanging rib is connected with the steel reinforcement cage, and the upper part of the circular hanging rib is connected with the positioning support frame through a buckle to form a positioning support system.

2. The bridge pile foundation steel reinforcement cage positioning combination fixture of claim 1, wherein the positioning support frame comprises a positioning frame and a support frame, the positioning frame is welded by five round steel bars with the diameter of 10mm, and the support frame is composed of 2 steel channels with the diameter of 1.8m, 4 hook head bolts and 2 thickened steel pipes with the diameter of 5 cm.

3. The bridge pile foundation reinforcement cage positioning combination fixture of claim 1, wherein the hook bolt is machined from a steel bar with a diameter of 20, the length of the bolt thread is 10cm, and the length of the straight section is 20 cm.

4. The bridge pile foundation reinforcement cage positioning combination fixture of claim 1, further comprising a jacket, wherein the jacket is integrally formed, a steel hinge with a thickness of 2cm is arranged in the middle of the jacket, a hole with a diameter of 30cm is formed in the center of the jacket, and the jacket is placed on the upper portion of the positioning support frame, so that the jacket is prevented from interfering with the structure of the lower fixture.

5. The bridge pile foundation reinforcement cage positioning combination fixture of claim 1, wherein the circulating suspension bar is composed of 2 steel bars with a diameter of 25mm and a length of 3m, two ends of each steel bar are welded with a steel plate with a thickness of 2cm, and the steel bars are connected with each other by 2U-shaped connectors.

6. A construction and use method of a bridge pile foundation reinforcement cage positioning combined clamp is characterized by comprising the following steps:

s3, lowering the reinforcement cage with the top removed;