Bridge basin support

Structural features
Pot type rubber support
The structural principle of pot type rubber bearing is that the rubber block placed in the sealed steel pot can bear the vertical load of the bridge with the reaction force generated under the three-way stress. At the same time, the elasticity of the rubber can meet the rotation of the beam end, and the horizontal displacement of the bridge superstructure can be completed through the free sliding of the stainless steel plate welded on the upper seat plate and the polytetrafluoroethylene. This series of products has a reasonable structure, large bearing capacity, small deformation, large horizontal displacement, flexible rotation, and good buffering performance. It is the best support for continuous bridges in construction, and has the advantages of light weight, compact structure, simple structure, low building height, convenient processing and manufacturing, steel saving, and cost reduction. It is an ideal support suitable for large span bridges. There are three commonly used categories: GPZ, GPZ (II), and GPZ (KZ). The bearing capacity of the GPZ (II) series bearings is 31 levels, with a bearing capacity of 0.8MN-60MN, which can meet the needs of large-scale bridge construction. In the GPZ (II) standard series, the horizontal bearing capacity of fixed bearings in all directions and in the non sliding direction of unidirectional movable bearings is not less than 10% of the rigid bearing capacity of the bearings. The horizontal bearing capacity of seismic resistant bearings shall not be less than 20% of the vertical bearing capacity of the bearings. The rotation angle of the support shall not be less than 0.02rad. After lubricating with 5201 silicone grease, the minimum design friction coefficient of the room temperature movable support shall be 0.03; After lubricating with 5201 silicone grease, the minimum design friction coefficient of the cold resistant movable support is 0.06.
Support classification
Pot type rubber bearings can be divided into three categories based on their application scope: road bridge pot type rubber bearings, railway bridge pot type rubber bearings, and derivatives of pot type rubber bearings. The commonly used models of highway basin type rubber bearings include GPZ basin type rubber bearings, GPZ (II) basin type rubber bearings (according to GT391-1999), GPZ (KZ) basin type rubber bearings, and several other series. The commonly used railway basin rubber bearings include TPZ-I railway basin rubber bearings, TPZ standard railway basin rubber bearings, and special bridge 8156 railway bridge bearings. There are many types of derivative products for pot type rubber bearings, such as QPZ pot type rubber bearings, KPZ series pot type rubber bearings, elastic shock absorption ball steel bearings, self elevating pot type rubber bearings, etc. Each type can be divided into three types based on the displacement form: fixed (GD), unidirectional activity (DX), and bidirectional activity (SX). 3. Install the anchor column at the four corners of the support base plate. 2. Pour the support pier, leaving a height at the top that is larger than the anchor column of the support; 3. Lift the support above the pad stone and correct the plane position and height; 4. Pour cushion stone concrete; 5. Install the four anchor columns on the upper part of the support; 6. Install cast-in-place beam formwork and bind cast-in-place beam reinforcement; 7. Pouring beam concrete; 8. Remove the temporary connections on both sides of the support.