What are the classifications of bridge expansion joints?

1.Seamless expansion joint: When the joint structure does not extend out of the bridge deck, the expansion gap at the end of the bridge is filled with elastic material and covered with waterproof material.

2.Plugged butt expansion joint: It is a telescopic device that uses the elasticity of the telescopic body to bear the wheel load, and the material used for the telescopic body is sand and gravel.

3.Steel support expansion joint: It is a structure assembled from steel that can directly withstand the load of the wheels. This telescopic device was mostly used in the past.

4.Rubber plate expansion joint: It is to make full use of the characteristics of low shear modulus of rubber materials, and set load-bearing steel plates and anchor steel plates in the rubber body.

5.Modular bridge telescopic device: It is a telescopic device composed of longitudinal beams (special-shaped steel), cross beams, displacement control box rubber sealing belts and other components.

In the construction of bridges, there are many types of bridge expansion joints used, and the bridge expansion joints produced by Zhongjiao Luda have a complete range of types, not only producing conventional types of bridge expansion joints, but also customizing them according to the actual needs of partners. For example, C-type, E-type, F-type, Z-type and other special-shaped steel expansion joints produced by Zhongjiao Luda; RBKF tooth plate expansion joint; SSFB expansion joint of toothed plate; ZJSF tooth plate expansion joints and other products. The bridge expansion joints produced by CCCC Luda are firmly connected, smoothly connected with the bridge deck, sealed and water-stopping, elastic and flexible, stable driving, and long service life, which are widely used in highways, railway bridges, public buildings, etc., and have successfully participated in many national key projects and influential landmark projects, and have been well received by partners.

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1. Single-seam steel expansion joints GQF-C type of single-group highway bridge expansion joints; GQF-F type; GQF-Z type; GQF-E type; GQF-L model single-seam steel expansion joints Single-group bridge expansion joints.

2. Multi-group expansion joints Modular bridge expansion joints GQF-MZL120, MZL160, MZL240, MZL480 and other multi-group modular expansion joint devices.

3. Comb plate bridge expansion joint device.

4. Rubber plate bridge expansion joint deviceHighway bridge expansion joint company produces all kinds of sewing equipment for sales (including GQF-C TYPE, GQF-Z type and GQF-L type, GQF-F type, GQF-MZL modular highway bridge expansion joint expansion joint expansion device, comb tooth type highway bridge expansion joint, highway bridge expansion joint).

1. Combined with the daily maintenance work of highway bridges, often clean up the sediment, stone chips and other debris accumulated in the sealed rubber belt. Prevent the free expansion and contraction of the expansion device when it is stressed, and the sealing rubber belt will be punctured by large stones and other objects, resulting in water leakage and sand leakage, etc., once it is found that there is damage, the tape should be replaced in time.

2. Frequently check whether there is damage, cracks and leakage at the connection between the side beam and the bridge deck pavement, and repair it in time once found, so as not to affect the anchorage strength between the expansion device and the beam and the plate.

3. Always check whether the top surface of the telescopic device is flat, if there is abnormal unevenness, it should be further checked whether the sliding pressure bearing or sliding compression bearing is damaged, and if it is damaged, it should be replaced in time. For the MCL type telescopic device, the convenience of parts replacement has been fully considered in the design, and it has been proved to be completely feasible through experiments.

4. In the daily maintenance, when it is found that there is too much uneven displacement between the joints of the expansion device, the displacement control system components can be checked in time to see whether they are damaged, and if they are found to be damaged, they should also be replaced in time. The unit uses standard components and is easy to replace.

5. The modular telescopic device belongs to the steel structure, although it has undergone good protection treatment before leaving the factory, but due to the harsh environment of use, after a certain period of use, it is normal to produce general corrosion, and then the maintenance department should regularly re-carry out anti-rust treatment to ensure the normal use of the telescopic device and good durability.

Product features of D60, D80, F60, F80 bridge expansion joints:

1. The standard displacement of expansion joints for highway bridges: 0-80 (mm) horizontally, 15mm vertically, and flexible telescopic.

2. Shallow pre-anchoring system is adopted, and the thickness of the beam end (including the pavement layer) only needs to exceed 240mm. (The thickness of the D-80 FD-80 model is 200mm).

3. The size of the F-shaped steel cavity is stable, and the tape is closely attached to the cavity, which has reliable sealing performance.

4. Long service life, under normal maintenance, it can achieve the effect of equal life with bridges.

5. The cost of the expansion joint product is low and the installation is convenient.

For the fragile parts of the bridge, special attention should be paid to the installation quality.

1) The reserved groove of the expansion joint should be straight, and its width and the embedded reinforcement should meet the design requirements. Special attention should be paid to the pre-embedding of the expansion joint reinforcement of the back wall of the abutment, which is often leaked during construction.

2) Temporary landfill should be carried out before paving asphalt concrete to ensure that the heavy truck is not loose and can adapt to a certain expansion and contraction.

3) The installation should be carried out by the professional team of the manufacturer. After slotting, check whether the width of the reserved groove meets the requirements, and if the section steel has the possibility of emptying, it should be replaced with a wider model. After the section steel is in place, it is necessary to carry out inspection and acceptance, including the positioning of the section steel, the welding of the steel bar, etc., and the concrete can be poured only after it is qualified.

Attention should be paid to the strength of concrete, the amount of steel fibers, etc., after the completion of the first comprehensive inspection before the formal construction.

The design code of the bridge expansion joint requires that the operation be carried out according to the instruction manual of the thing, and if it is unclear, you can find relevant personnel to explore and study it to solve it from the root.

Bridge expansion joint: In order to meet the requirements of bridge deck deformation, expansion joints are usually set between two beam ends, between beam ends and abutments, or at the hinged position of the bridge.

At one end of the sliding support, where it intersects with the abutment.

The bridge expansion joint is an expansion device arranged at the movable end of the bridge superstructure and the broken joint of the bridge deck. The function of installing the expansion device is to ensure that the displacement of the superstructure under the action of temperature change, concrete shrinkage and creep, and load can be realized without generating additional additional internal forces, and can ensure smooth driving. Generally, the expansion joints of domestic bridges are arranged at the movable end of the superstructure and the abutment, as well as the junction of the superstructure of each joint (hole).

Continuous beams are generally calculated by coupling. The coupling is an expansion joint set between the continuous beams.

Pavement expansion joints are generally arranged in the bridge deck pavement layer.

Hello, according to the experience of Hengshui Baijin Rubber Company in the production of bridge expansion joints, the bridge expansion joints are generally arranged at one end of the sliding bearing, at the intersection with the bridge abutment;

For large bridges, multiple expansion joints will be calculated at the corresponding support points in the middle of the bridge.

The specifications, models and forms of bridge expansion joints are different, and the installation requirements are also different.

1. Elastomer expansion joints:

Elastomer <>

The device is mainly embodied in the zinc-iron expansion joint device and the TST gravel elastic expansion joint, which is a very simple expansion joint device. It is suitable for bridges with small and medium spans. When the amount of scaling.

In the process of bridge construction, when the expansion and contraction range is in the range of 20 mm to 40 mm, it is generally recommended to use TST crushed stone elastic expansion joints. [Click to get real-time from the manufacturer**].

2. Shear expansion joint device:

This shear expansion joint device is mainly an expansion joint that uses rubber belts of different cross-sectional shapes as filling materials. Because the rubber has good elasticity, it is convenient for construction and pasting, and it can also meet the deformation requirements caused by the force of the bridge. In addition, the expansion joints are also waterproof.

3. Steel support expansion joint device:

Disadvantages of steel support expansion joint device: It is difficult to meet the needs of large displacement in bridge engineering, because it is difficult to achieve impervious sealing of steel expansion joint device. And this defect is very easy to cause the impact on the vehicle when passing the bridge, and then affect the driving stability of the vehicle.

4. Modulus support expansion joint:

This type of expansion joint is mainly used in <>

When the deformation is 50 mm, this steel module is used to support the expansion joint. The disadvantages of this rope seam device: the structure is complex, and it often produces slapping and noise because of the rotation of the beam end, and the expansion joint structure is easy to be destroyed.

Therefore, in the construction process, it is often necessary to adopt the device of bolt spring to fix the slide plate accordingly, so as to reduce its defects.

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1. Single-seam steel expansion joints: GQF-C type, rounded GQF-F, Tongshan 80 type, GQF-Z type.

2. Expansion joints of highway bridges with blind wheel collapse single group: GQF-E type; GQF-L type.

3. Multi-group expansion joints: GQF-MZL120 type, MZL160 type.

4. Modular bridge expansion joints: MZL240 type, MZL480 type.

5. Comb plate bridge expansion joint device.

1. Brother cracked single-seam steel expansion joint, single-group highway bridge expansion joint GQF-C type; GQF-F type; GQF-Z type; GQF-E type; GQF-L model single-seam steel expansion joints Single-group bridge expansion joints.

2. Multi-group expansion joints Modular bridge expansion joints GQF-MZL120, MZL160, MZL240, MZL480 and other multi-group modular expansion joint devices.

3. Comb plate bridge expansion joint device.

4. Rubber plate bridge expansion joint deviceHighway bridge expansion joint The company produces all kinds of sewing equipment sales, including GQF-C TYPE, GQF-Z type and GQF-L type, GQF-F type, GQF-MZL type mold cavity dust argument type highway bridge expansion joint expansion joint, comb type highway bridge expansion joint, highway bridge expansion joint.