Gas shield dam
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Rubber dam
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Bridge core mold

Rubber dam introduction

Rubber dam introduction

Rubber dam is a high-strength synthetic fiber fabric as a force skeleton, in its internal and external coating of synthetic rubber for sticky and doubles as a protective layer, and then according to the design requirements of the size of processing into the dam bag, anchor on the concrete base plate, into a closed Bag-shaped, need to block the water (gas) inflated, as rivers, ditches on the retaining structure, do not need to block, vent the dam bag of water (gas), you can restore the original river, Over flow section. Rubber dam dam height can be adjusted according to need, the crest can overflow, from the activities of dam and overflow weir role. It has the unique advantages of simple design, low investment, quick effect, flexible storage, easy operation, good seismic performance, safe water discharge and so on. The United States in 1957 built the world's first rubber dam, and soon in many countries in the world are widely used.

China's scientific and technological personnel since 1965 on the rubber dam technology to carry out collaborative research, model research and model test, in 1966 China built the first rubber dam project. China's rubber dam development has gone through three stages of development, the first generation of dam bags using cold-stick method, artificial molding process, has been eliminated; second-generation dam to switch to a certain pressure, the temperature of a single vulcanization of hot pressing machinery Molding process, this process on the canvas coating, vulcanization into a single rubber sheet, and then a piece of plastic plate width, according to the size of the need to stitch into a dam bag, the drawback of this process is the increase in the thickness of the seams Times, the entire dam bag thickness is not uniform, the water effect is poor, the seams due to the second vulcanization, the canvas caused secondary damage, reduce the dam bag strength; third generation rubber dam is no seams rubber dam, this The characteristics of the process is the entire dam bag vulcanization molding, the dam bag thickness consistent, dam bag water effect, flexion increased significantly, the force conditions are good, to achieve a mechanized installation, saving installation costs and time. With the popularity of rubber dam application, China has developed a "rubber dam technical guide" SLJ03-88, "rubber dam technical specifications" SL227-98 and "rubber dam bag" SL554-2011 and other industry standards, and promote China's rubber dam The vigorous development of China has now built a few rubber dam project, widely used in water conservancy, river regulation, landscaping and other projects.

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Rubber dam introduction