What should be used to plug the leakage of tunnel cracks?

1. Plugging --- leakage cracks, deformation joints, settlement joints, and cold joints, using pinhole method deep high-pressure grouting to plug leaks, and the grouting materials are made of newer water-soluble polyurethane grouting materials at home and abroad, but the characteristics of such materials should be improved to be suitable for the use environment of highway tunnels, such as the grouting material of the deformation joint should have the characteristics of anti-deformation after curing, and the grouting material solidified body will not shrink and dry up with the seasonal rainy season, and it will not be deformed and leaked again when there is water for the second time. There is also the control of the curing speed and strength of the grouting material in the event of a large water inrush. When the small cracks (mm) leakage, the low viscosity of the grouting material should also be studied, so as to ensure that the materials and processes can ensure the characteristics of the grouting and plugging treatment of water seepage cracks in highway tunnels, so as to ensure the restoration of the integrity of the second lining and the requirements of the original tunnel design.

2. Drain the --- in the position where the settlement joint and leakage are relatively heavy, use the method of drilling, drill the second lining through, drain the water that leaks to the back of the second lining through the damaged position of the waterproof board, reduce the water pressure behind the second lining, reduce the possibility of leakage in other parts, restore the drainage channel behind the second lining of the tunnel, and dig a vertical downward drainage groove on the surface of the second lining of the borehole mouth for the aesthetics of the surface of the second lining, and use the pipe pumping method to make a pipeless cavity and discharge the water into the ditch. It is necessary to study the location and angle of the drainage borehole, the performance and portability of the drilling equipment, etc.

3. Anti---- for the leakage of microscopic cracks and microscopic channels, which can not be treated by high-pressure grouting by high-pressure grouting is used to paint cement-based permeable crystallization coatings, so that the crystals can enter these tiny crevices with the leakage channel of water, so as to achieve the effect of impermeability, and also increase the strength of the surface of the secondary lining, and compare and improve the characteristics of the existing permeable crystalline materials suitable for highway tunnel plugging.

4. To prevent --- grouting joints and drainage joints that have been constructed, it is necessary to prevent disturbance due to various other reasons, and then crack and leak, and paint with waterproof coating with certain elasticity and adhesion to increase waterproof performance. For grouting joints where cracks are concentrated and severely biased, carbon fiber cloth with reinforcing and reinforcing effect can be pasted on the dry surface after grouting to waterproof.

You can consider using the process of high-pressure chemical grouting to plug the leakage, if there is no condition, you can find Taishi to cooperate, this old brand strength is still okay.

Good afternoon, dear, I'm honored to answer for you. The conventional treatment methods of tunnel leakage water include chemical grouting, cement grouting, and grouting plugging. When the wrong material is chosen, this kind of plugging-based treatment idea can not completely solve the problem of water leakage in the tunnel wheel family, and water seepage often occurs after grouting **, and the crack width will become larger and larger after the water erosion of the early spike for a long time.

Therefore, tunnel crack leakage should be repaired, reinforced, not blocked, and the current tunnel crack leakage treatment generally uses high permeability modified epoxy slurry.

Tools Raw materials: electric picks, small air compressors, angle grinders, YYA waterproof and impermeable slurry, YY16 flash slurry, RD-N internal waterproof slurry.

1. Use an angle grinder to clean the base layer quickly, and keep the base layer clean, wet, rough and firm. If the base layer is dry, it needs to be moistened with water.

2. Where the water leaks from the base layer, the spray gun is connected to the small air compressor, and the YYA special waterproof slurry is sprayed for the first time as a whole, and the spraying can be uniform.

After hours, observe if there is a leak. Where there is a water leakage point, it is blocked with YY16 flash slurry.

4. After ensuring that there is no water leakage in a large area, the whole is sprayed with YYA special waterproof slurry for the second time.

5. After the strength of YYA special waterproof slurry comes up, then paint the waterproof slurry in RD-N on both sides.

The causes of water leakage in tunnels can be roughly divided into two types: natural factors and human factors.

1. Natural factors.

The impact of tunnel excavation on groundwater is an objective factor for tunnel leakage. According to the principles of hydraulics and hydrogeology, groundwater flows from high pressure water level to low pressure water level, has its fixed flow line, due to the excavation of the tunnel, the formation of low water pressure area of the free surface, changes the mechanical characteristics of the surrounding rock and the groundwater runoff route, so that the surrounding groundwater collects and accumulates in the tunnel, leaving hidden dangers for the lining and bottom seepage water. The size of the influence range of tunnel excavation is related to the permeability coefficient of the stratum, the water level, and the size of the water cross-section, and is also affected by atmospheric precipitation, tunnel depth, and karst caves, springs, reservoirs, or rivers, rivers, and lakes around the tunnel.

2. Human factors (1) The tunnel anti-drainage system is imperfect, the drainage pipeline is unreasonable, the depth and width of the drainage ditch are not enough, or it is blocked by mud, sand, mortar, and grout, and cannot be drained normally; (2) The waterproofing, materials, construction technology and quality inspection of concrete construction joints, structural connections, and concrete defective parts are not strict. (3) No special treatment measures are taken for special sections (erosive groundwater, cold and severe cold areas, etc.), and the concrete lining is often acted on by erosive media, resulting in fluffing, crisp looseness, honeycomb surface, etc., resulting in the reduction of material strength, thinning of lining thickness, resulting in water leakage.