What are the daily maintenance of bridge bearings?

The main function of the bridge bearing is to transmit the dead load and the live load reaction force on the bridge span structure to the pier abutment of the bridge, and at the same time it can ensure the displacement and rotation required by the bridge span structure, so that the actual stress situation of the structure can be consistent with the calculation schema adopted in the design, so it is a very important work to ensure the normal use and integrity of the bearing. The daily maintenance requirements of bridge bearings are mainly as follows:

1. All parts of the bearing should be kept intact and clean.

2. A layer of lubricating oil should be applied regularly on the rolling surface of the rolling bearing (generally once a year). Before applying oil, the rolling surface should be wiped clean.

3. The steel bearing should be rusted and anti-corrosion, and all parts of the bearing should be painted with paint protection except for the steel roller and the rolling surface. The firmness of the anchor bolt should be checked for the fixed bearing, and the supporting backing plate should be flat and tight, and the joint bolt should be tightened in time.

Fourth, all kinds of rubber bearings should be cleaned frequently, remove the water accumulation of piers and caps, prevent rubber bearings from contacting grease, and clean the residual engine oil at the bottom of the beam and piers and caps to prevent the loss of effect due to rubber aging and deterioration.

5. The basin rubber bearing should be cleaned regularly, and the bearing dust cover should be set up to prevent dust from falling into or rain and snow from penetrating into the bearing. The exposed part of the bearing should be regularly coated with red dan anti-rust paint for protection.

What are the functions of bridge bearings! Hello, I am glad to answer for you<> pro-bridge bearings are important structural components connecting the bridge superstructure and the substructure. The bridge bearing is located between the bridge and the stepping stone, which can reliably transfer the load and deformation (displacement and turning angle) of the bridge superstructure to the bridge substructure, and is an important force transmission device of the bridge.

There are two kinds of fixed bearings and movable bearings. The commonly used bearing forms for bridge engineering include: linoleum or flat bearing, plate rubber bearing, spherical bearing, steel bearing and special bearing.

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The specific requirements are:

1) The quality of the goods should be strictly controlled when the bearing is purchased, and the bearing mixed with recycled rubber shall not be used.

2) To order a complete set of support products, and the steel plate of the exposed part of the support should be absolutely judged to be hot-dip galvanized according to the requirements.

3) When ordering the support, the manufacturer is required to promise that if quality problems are found during the bridge inspection before the opening of traffic and the completion inspection, it will be unconditionally replaced by the manufacturer.

4) The construction quality of the cushion stone of the bearing should be ensured, to ensure that the three degrees: height, flatness and levelness, special inspection should be carried out, and the on-site record and signature should be done, and it is strictly forbidden to level with mortar.

5) After the supporting device is in place (prefabricated hoisting and cast-in-situ device), a special inspection should be carried out, and the on-site record and signature should be made, and the file should be filed in triplicate for future inspection. Check the contents including: whether the support device has a pure deviation and skew scene; Whether there are bolts, steel plates or PTFE plates missing; Whether the direction of the device is wrong, etc.

The bearing should be maintained regularly during its service life, including the surface painting of the steel parts, the regular scrubbing and lubricating oil of the rotating part of the roller shaft and the rocking shaft, the scrubbing of the stainless steel surface of the sliding bearing, and the inspection of the anchor bolt of the bearing, etc. Only regular maintenance can ensure the normal working condition of the bearing.

The maintenance and inspection work must be carried out before the maintenance and reinforcement of the bridge bearing each time, and these work contents can not only ensure the normal operation of the bridge bearing, but also ensure the normal use of the bridge.

1) Whether the linoleum of the cushion support has aging and fracture;

2) Whether there is rust in the sliding bearing of the steel plate and the arc bearing;

3) Whether the position of each component of the pendulum column support is correct and whether the force is uniform;

4) Whether the fixing bolt of the sliding basin rubber bearing is damaged or the nut is loose;

5) Whether the rubber bearing has aging and deformation;

6) Whether the movable bearing is flexible and whether the actual displacement is correct;

There is also to see whether the waterproof device and its drainage device are leaking, if this is left unattended for a long time, the bearing will rust and corrode, so that the normal use of the bridge bearing can not be guaranteed.

Hello, Hengshui Guoheng Rubber and Plastic Products will answer for you how to do the regular inspection and maintenance of bridge bearings.

1. All parts of the bearing should be kept complete, clean and effective, should be inspected and maintained once a year, snow and ice should be removed in time in winter, and the beam span should move freely.

2. A layer of lubricating oil should be applied to the rolling surface of the rolling bearing every year. The rolling surface should be cleaned before applying oil.

3. Except for the steel roller and rolling surface, the rest of the metal parts of the bearing should be maintained regularly and should not be corroded.

4. The anchor bolt should be checked every two years for the fixed bearing, and the support backing plate should be flat and tight, and the joint bolt should be tightened in time.

5. The shear displacement caused by the dead load of the plate rubber bearing should be within the design range; The bearing shall not produce compression deformation that exceeds the design requirements; The rubber protective layer of the bearing should not be cracked, hardened and aged, and the rubber outside the stiffening steel plate between the layers of the bearing should be uniform and normal; The top surface of the supporting pad stone should not be cracked or waterlogged; When carrying out cleaning and repair work, the rubber bearing should be protected from contact with grease.

6. For rolling basin rubber bearings, the fixing bolts shall not be sheared and damaged, and the loose nuts shall be tightened in time.