What kind of cement is used for tunnel waterproofing, and how is the tunnel waterproofed

The American permanent condensate DPS waterproof material has many advantages: water-based permeable crystalline inorganic waterproof material, completely penetrates into the concrete, and does not scree the protective layer. Do not sprinkle water for curing, do not stir, etc.

After the construction is completed, it will not affect the post-sequence work. It is completely environmentally friendly, non-toxic, colorless and odorless, and will not age, and has a good life. Anti-chloride ions, etc.

The penetration depth is about 3 cm, and the impermeability level can reach more than S11. There are various national norms. Acid, alkali and corrosion resistant.

The biggest difference with cement-based permeable crystalline waterproof materials is: do not sprinkle water, do not cure, do not stir, etc., spray directly. The construction is convenient and the effect is easy to guarantee. And it's perfectly fine without a protective layer.

There are also series products to meet the needs of different situations. Not expensive. Save the construction period and the cost is not high. It shrinks like concrete, so it is resistant to temperature changes. Does not absorb heat.

It's not wrong to know one more material. But now a lot of fakes are just that. It is said that it is an enterprise standard, a non-standard and the like. Judge for yourself.

Encyclopedia: "American Perpetual Liquid DPS", "Construction Plan of American Perpetual Condensate DPS Waterproof Material", etc.

Xiamen Li Ji waterproof permanent condensate dps.

Use ordinary cement with a rigid waterproofing agent. We have successfully treated the settlement joints of dozens of tunnels of the Daqin Railway. Provide free professional technical consultation on concrete waterproof leakage water repair, and introduce the performance of plugging materials. Eliminate the trouble of repairing today, leaking tomorrow, repairing every year, and leaking every year.

Ordinary cement plus internal reference rigid waterproofing agent. CF-2000 cement-based permeable crystalline waterproofing agent is your first choice. We have more than 30 years of experience in the reinforcement construction of waterproof and leakage plugging structures, and provide free professional and technical consultation on concrete waterproof leakage repair, and introduce the performance of plugging materials.

Eliminate the trouble of repairing today, leaking tomorrow, repairing every year, and leaking every year.

Of course, this is mainly waterproof membrane or waterproof coating, and cement alone is not enough to prevent water.

Tunnel waterproofing engineering is a systematic engineering project involving many disciplines such as engineering, sealing, geology, etc., and the principle should be closely combined with engineering geology, hydrogeological conditions, engineering structure characteristics, engineering use and use requirements.

1. The design follows the comprehensive management principle of "combination of prevention, drainage, plugging and interception". Take a variety of measures to achieve the purpose of smooth drainage, reliable waterproofing, economic reasonableness, and no future troubles, so as to achieve the purpose of waterproofing;

2. The general principle of waterproof design should be based on prevention, multi-channel fortification, waterproof combination, and comprehensive treatment;

3. The tunnel lining structure can be made of self-waterproof concrete, which is regarded as a project and a permanent waterproof line to prevent seepage or leakage. Effective measures need to be taken during construction to prevent penetrating cracks in the structure;

4. The deformation joints must be reasonably set according to the characteristics of the project itself and the requirements of use, and the setting of the construction joints should be determined according to the specific research and determination of the construction conditions. In order to eliminate most of the shrinkage stress of concrete, the construction joints should be dense and not sparse, and the waterproofing of special parts such as deformation joints, construction joints and wall pipes should be strengthened;

5. The construction process of the tunnel waterproof board should ensure that the waterproof layer has the overall sealing of the connection;

6. If the shallow buried section of the tunnel entrance and exit is long, the overburden is mostly loose, and the surface has the characteristics of catchment topography, the water interception gutter can be set at the top of the tunnel, and the surface is partially grouted, and a certain range of the top plane of the tunnel is closed to prevent surface water infiltration.

The concrete structure is self-waterproofing.

The key to self-waterproofing of concrete structures is to ensure that the concrete is dense and that the concrete does not crack during construction. Ordinary waterproof concrete has shrinkage cracking, and compensating shrinkage concrete solves this problem well, it is mixed with expansion agent in cement or mixed with expansion cement.

Commonly used admixtures include anti-crack FS waterproofing agent, U-type expansion agent, etc. Practice has proved that the addition of admixtures can achieve ideal anti-cracking and anti-seepage effects.

Lay the waterproof board. Buried drains. Grouting waterproofing. See what situation and what method to use.

The waterproof board is laid without nails, and the connection between the seams of the board is thermally sealed by the material itself, and the welding is tight and reliable. The work bench is used in construction, and the bench is long. The base surface treatment is carried out first, and then the waterproofing layer is laid, and the base surface treatment is usually two cycles ahead of the waterproofing layer operation.

Composite waterproof board thick non-woven fabric), width meters. The sling construction method is adopted, that is, the cloth strap pasted between the main board and the non-woven fabric is used to fix the waterproof board on the hidden nails; The seam connection of the waterproof board is welded by hot air double weld construction technology, and the lap length is 15cm.

Waterproofing plate laying: Use the cloth strap behind the waterproofing plate to fix the waterproofing plate on the hidden nails. The spacing of the fixed points of the waterproof board: the arch is the side wall, the fixed point is appropriately increased at the concave and convex places, and the waterproof layer between the points shall not be tightened, so as to ensure that the waterproof plate is not damaged when the secondary mold injection concrete is poured.

Precautions for the construction of tunnel waterproofing board.

Before the tunnel waterproof plate is laid, the reinforcement head and the bolt head on the sprayed concrete surface are cut off first, and then smoothed with a hand-held grinder, and the uneven parts should be repaired and sprayed to make the concrete surface smooth, and there is local water seepage, which should be treated in time.

Tunnel waterproof board according to the circumferential laying, welding process and fixing process should be closely matched, generally welded first and then fixed, tunnel waterproof board laying lap width of 10 cm, welding width not less than 2 cm. Missing welding, false welding should be repaired, if there is scorching, welding penetration, should be covered with the same waterproof plate welding paste or according to the instructions of the supervising engineer.

The above content refers to Encyclopedia - Waterproof Sheet.

Encyclopedia - Tunnel Construction.

You can dig a ditch about 500*500 on both sides of the tunnel, and dig about 1 collection well every 20m or so. A 3kw float submersible pump is placed in the sump well. When the water level reaches a certain height, the water is automatically pumped.

If water seepage has occurred, drain the water first. Take the above measures again.

Answer: Tunnel waterproofing: The waterproofing measures taken to ensure that the tunnel operation will not be caused by water leakage and water accumulation, which will affect the use of functions and corrode equipment. Generally, a comprehensive treatment method combining interception, plugging and drainage is adopted. Mountain tunnels are often mainly drained, and underwater tunnels are often blocked.

The specific waterproof technologies are: (1) interception, setting up a water interception ditch and a drainage ditch at the entrance of the tunnel to cut off the water source flowing to the tunnel, or diverting the surface water. (2) plugging, a waterproof layer is set in the tunnel, the shield tunnel segment is made of waterproof concrete, and 1 2 rubber sealing rings, caulking grooves, bolt waterproof washers and other anti-plugging and leakage are set at the joints, and the lining is filled with grouting behind the backing, and the cavity of the lining is filled and compacted.

3) drainage, set up a drainage ditch pipe in the tunnel, and use the tunnel slope to discharge the water out of the tunnel; In the inverted underwater tunnel, a sump well can be set at the lowest part of the tunnel, and then the water is pumped out of the tunnel step by step with a multi-stage centrifugal pump. [1]

Ask how much is the usual business ** of the tunnel waterproofing.

Answer: Tunnel waterproof plugging includes engineering exterior wall paint, advanced water-based exterior wall paint, super water-based exterior wall paint, multi-functional elastic waterproof paint and so on. **From 200 to 1000, it is recommended to visit the store. The ability of the extended waterproof coating film to adapt to the deformation of the base layer.

After the tunnel is waterproofed and plugged into a film, it must have a certain extensibility to adapt to the deformation of the base layer caused by temperature difference, dry and wet and other factors, and ensure the waterproof effect.

Relevant waterproof measures, the basic situation is as follows: 1) take a smooth blasting plan to ensure that the excavation surface is smooth This is the basis for doing a good job of tunnel seepage and leakage, smooth blasting is not good, it is easy to bring: The arch backfill is difficult, once it is not compact, it is easy to form a water bladder; The rock surface is uneven, and the sprayed concrete is difficult to level; It is difficult to lay waterproof boards, so in the construction, the operation is carried out in strict accordance with the requirements of the smooth blasting process.

2) Strictly control the grouting water-stopping and waterproof sections that need to be reinforced by grouting and waterproofing, especially the water-rich sections and broken surrounding rock sections, and carry out the construction in strict accordance with the grouting design, and implement the principle of "prevention-oriented, anti-drainage combined, and comprehensive treatment" to ensure that the quality of grouting waterproof achieves the water-stopping effect, basically realizes the wireless flow of the grouting section, and initially forms a water-stopping ring outside the initial support, so as to create conditions for safe excavation and waterproof tunnels. 3) Strictly use the short step method for the construction of the small conduit grouting pass, strictly implement the construction principle of "pipe advance, strict grouting, short excavation, strong support, fast closure, and diligent measurement", and conscientiously do a good job in the initial support, especially the backfill behind the initial support, so that the leakage water does not flow, otherwise the serious leakage water is punched, and the lower pipe is supplemented with grouting until it meets the requirements. The work must be done in parallel, carried out in sections, do a good section, and initially inspect a section, otherwise, it will not be allowed to do secondary lining.

Before construction, according to the engineering geology and hydrogeological conditions, after passing the test, the grouting is carried out. According to the pre-grouting range, geological conditions and groundwater conditions, in order to ensure the water plugging effect of grouting reinforcement, reasonable grouting parameters and grout ratio are selected. During the grouting process, the grouting pressure is strictly controlled to prevent structural deformation, grouting and other phenomena.

After the grouting is completed, the radial drilling method is used to inspect, analyze and judge the grouting effect. 4) Hold the shotcrete waterproofing off The shotcrete adopts wet spraying technology. The spray concrete is re-sprayed, the cover is sprayed for the first time, the grille is erected, and then the net is hung and then re-sprayed, and the identification steel bar for detecting the thickness of the shotcrete is buried to check the thickness of the sprayed concrete.

28 days before the construction of shotcrete, the site layout drawing, machinery, and mixture ratio data shall be submitted to the supervision for approval, and then implemented after approval. Allowable deviation of raw material weighing (by weight ratio): 2% for cement, quick-setting agent, 3% for sand and gravel.

Mixing time: The shotcrete is fed in batches by compulsory mixer, and the mixing time is not less than 2 min Transportation and storage time, when not mixed with accelerator should not exceed 2 hours, when mixed with accelerator should not exceed 20 min, and the mixture should be used with mixing.

Summary. 1. The design follows the comprehensive management principle of "combination of prevention, drainage, plugging and interception". Take a variety of measures to achieve the purpose of smooth drainage, reliable waterproofing, economic reasonableness, and no future troubles, so as to achieve the purpose of waterproofing;

1. The design follows the comprehensive management principle of "combination of prevention, discharge, blockage and interception". A variety of measures are taken to achieve smooth drainage, waterproof feasible and reliable, economical and reasonable, and no aftermath to achieve the purpose of waterproofing;

2. The general principle of waterproof design should be based on prevention, multi-channel fortification, waterproof combination, and comprehensive treatment;

3. The tunnel lining structure can be made of self-waterproof concrete, which is regarded as a project to cure the root cause and a permanent waterproof line, so that it does not seepage or leak. During the construction, effective measures should be taken to prevent the structure from producing through-type cracks and dust chain cracks;

4. The deformation joints must be reasonably set according to the characteristics of the project itself and the requirements of use, and the setting of the construction chain joints is determined according to the construction conditions. In order to eliminate most of the shrinkage stress of concrete, the construction joints should be dense and not sparse, and the waterproofing of special parts such as deformation joints, construction joints and wall pipes should be strengthened;

5. The construction process of the tunnel waterproof board should ensure that the waterproof layer has the overall sealing of the connection;

6. If the shallow buried section of the tunnel entrance and exit is longer than the Kai slag, the overburden is mostly loose, and the surface has the characteristics of the catchment terrain such as the late Sun Qi, etc., the water interception code can be set at the top of the cave such as the gutter, the surface of the local grouting and a certain range of the top plane of the cave is closed to prevent surface water infiltration.

The key to the self-waterproofing of concrete structures is to ensure that the concrete is dense and that the concrete does not crack during construction. Ordinary waterproof concrete has shrinkage cracking, and compensating shrinkage concrete is a good solution to this problem, it is mixed with expansion agent in cement or mixed with expansion cement. Commonly used admixtures include anti-crack FS waterproofing agent, U-type expansion agent, etc.

It has been proved in practice that the addition of admixture Nabu can achieve the ideal anti-cracking and anti-seepage effects.