What are the precautions of steel pipe pile in the construction of steel bridge

The steel bridge is defined according to the manufacturing material, and the main feature of the steel bridge is modularity. The steel bridge is composed of lightweight standardized truss unit members and beams, longitudinal beams, bridge panels, bridge seats and connectors made of high-strength steel. The installation equipment used can be assembled into trussed beam Bridges suitable for various spans and loads. A large number of them were used in the Far East battlefield to repair Bridges or erect temporary Bridges. The advantage of steel bridge welding is that the steel can be easily used from any orientation, Angle and shape intersection, generally there is no need to attach the connecting plate, connect the parts of the Angle steel, and there is no need to open holes in the steel.

The construction of steel bridge is complicated and involves many procedure steps. Steel pipe pile will be used as the substructure in the construction. The following introduces the points for attention in the construction of steel pipe pile.

In the actual construction cases, steel pipe pile is generally used as the lower structure, and the upper part is composed of Berei bridge and section steel. Therefore, the construction of steel pipe pile is very important, because the foundation pit support appears in a large number of engineering projects, and has become a major problem to be solved in the project, the design and construction of steel pipe pile under the condition has been paid more and more attention.

Steel pipe pile construction precautions:

1. Error control. Because the steel pipe pile is close to the foundation pit for construction, and is located near the mixing pile side of the foundation pit, it is necessary to strictly control the verticality when drilling, and pay attention to the selection of appropriate drilling rig and drilling process. The verticality adopts the method of measuring the Angle of drill pipe by compass, and the error is controlled within 2 degrees.

2. Residue cleaning. When drilling, the mud circulation is used to protect the hole, and the mud flowing out of the hole is constantly cleaned up the residue. Generally, the drilling depth is not less than the pile length plus 0.5m, so as to facilitate the sedimentation of sediment in the hole. After the drilling is completed, it is necessary to repeatedly use the mud circulation to clear the hole and try to clear the residue such as rock debris in the hole.

3. Position of steel pipe pile. When inserting a human steel pipe pile, pay attention to preventing the steel pipe pile from bending and distorting. The steel pipe pile must be placed in the center of the hole.

4. Steel pipe pile cleaning. After the construction of steel pipe pile is completed, it is necessary to clean the hole again. Use the pump to inject a lot of water into the hole, the mud in the hole to replace, until the hole is flowing out of the water.