Bridge waterproof construction method and matters needing attention

Bridges occupy such an important role in our lives. Waterproof construction on bridge decks can't be sloppy at all. So, how many passes will it take for bridge deck waterproof construction to pass? The following small series will introduce you to the bridge surface waterproof construction methods and precautions.

Bridge surface waterproof construction method

1. Keep the material dry before coiling, and remove surface debris and laitance;

2, the length of the web lap, the long side is not less than 10cm, the short side is not less than 15cm; upper and lower two layers and adjacent two webs are staggered seams, the upper and lower layers of the web must not be perpendicular to each other;

3, the thickness of the asphalt adhesive glued to the coil, the control is 1.5mm ~ 2.5mm, and shall not exceed 3mm;

4. In the vicinity of the flower decoration fence, the lap joints of the coiled material shall be placed on the bottom surface not less than 60cm away from the decorative fence;

5. The waterproofing layer of the coiled material at the junction of the concrete bridge deck and the flower decoration fence shall be coated with an obtuse angle or arc shape before laying. When laying, additional layers shall be added on the waterproof layer. Use two layers of the same linoleum or a layer of asphalt glass cloth linoleum, when the paste is close to the shape of the junction; when the junction is composed of three different directions of the surface, in addition to the additional layer, add a layer of asphalt glass cloth felt or The metal sheet is reinforced;

6, paste the sheet to be flattened compaction, the membrane and the concrete bridge deck pavement and the layers must be tightly bonded, and multi-pitch asphalt cement extrusion materials, lap joints must be tightly sealed to prevent the emergence of Waterway; After the last layer of membrane is pasted, the surface should be coated with a layer of hot bituminous cement with a thickness of 1mm to 1.5mm. The control air temperature when the waterproof layer of the web is laid is not lower than +5°C, otherwise it will be carried out in a warm shed. Asphalt rubber working temperature not less than 150 °C.

Bridge waterproof construction precautions

1, the paint should be stirred before use

2. It is expected that the paint cannot be surfaced before the rain can not be constructed

3. During the construction process, it is forbidden to step on the dry waterproof layer

4, after the completion of the waterproof layer, before the asphalt concrete pavement layer is not on the protection before the waterproof layer is dry, it can be opened on the following 10t cars, but not on the curve, reversing, braking and so on. More than 10t trucks, forklifts, cranes, etc.

Editor's summary: The construction method and precautions for bridge deck waterproofing are introduced here. I hope to be helpful to everyone. If you want to know more related information, you can pay attention to this website information.

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