Analysis of dam bag installation precautions

The dam bag installation technology of the water-filled bolt anchoring rubber dam is discussed. Before the installation of the dam bag and the preparation of the dam bag in the early stage of the dam bag installation, the dam floor, the dam pier, the anchoring member, the charging and drainage system and Comprehensive inspection of the dam bag to ensure the quality of the dam bag installation.

The dam floor and the dam pier are required to be sprinkled for 15 days when the average temperature is about 25C according to the requirements of the Technical Specification for Sluice Construction. The dam bag can be installed after the concrete age reaches 6od. The dam floor and the dam pier and the rubber dam shall have some irregularities and corners in the contact range, and the grinding and slipping shall be removed, and the concrete residue, wire and wood block in the area around the anchoring groove and the dam bag collapse shall be carefully removed. The expansion joint should be smoothed with epoxy resin. The contact surface between the dam pier and the dam bag should be polished with a grinding wheel and coated with epoxy resin one or two layers to prevent damage to the dam bag due to vibration friction caused by water flow pulsation, wave impact and other factors, and can eliminate the collapse of the dam head. Bad effects caused by shoulders. The anchoring member checks whether the distance and height of the embedded bolt meet the design requirements. There are larger and more impressive records for special handling when processing the platen. Remove the debris from the bolt and use the wrench to pull the thread. The inclined bolts are corrected to the vertical state, and the gaps between the two adjacent gaskets are smoothed with epoxy resin. Check whether the pressure plate is deformed or rusted, and whether the hole spacing meets the design requirements. If it is not suitable for picking and processing, use the sander to sharpen the edge to avoid hurting the dam bag during installation. Before the dam bag is installed, the water test should be carried out to check the foreign matter in the pipeline and check whether the pipeline is unblocked or not. Check whether the position and size of the inlet and outlet and the overpressure overflow hole meet the design requirements. Grind the edges of the water cap and flange with a sander, brush a layer of epoxy resin, and then apply rubber on the surface to prevent damage to the dam bag. The water cap connection should also be coated with epoxy to prevent rust. After the dam bag and the bottom gasket are on the scene, they should be checked whether there is a product certificate and a warranty, and an inspection report on the relevant parameters issued by the testing agency of the national measurement certification is attached. In combination with the installation in position, check the quality and appearance of the dam bag and the bottom gasket, check whether the thickness and number of layers of the dam bag meet the design requirements, and repair or replace if there is deformation and damage.

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