Tunnel construction is a costly and complicated engineering construction project, is also a permanent facilities, common waterproof layer an aging, life is limited, once damaged, difficult to repair, maintenance, even if is costly. Common waterproof layer in the process of construction, also easy to damage. The CretesealerDPS is different, the life like the life of concrete structure, due to the infiltration of concrete thickness. So, the construction process, the lining block as long as it doesn't appear more than 10 cm deep wounds, waterproof performance will not be affected.

Also, if the project need CretesealerDPS can also apply on the first layer of lining wall waterproof as inner lining, or the construction on the inner wall of the inner lining as anti-corrosion lining concrete, the carbide.

In composite lining of tunnel construction, Cretesealer DPS can be directly on the surface of the calender that sprayed concrete spray layer, as the inner lining of the waterproof layer increase.

Generally in underground tunnel construction, the surrounding geological structure of grant Thornton, water cut, the tunnel before completion of the construction ventilation is bad, the air humidity caused surface waterproof construction is always wet surface, this requires can on the basis of wet construction waterproof material. Cretesealer DPS is wet steam is needed to better penetrate reaction of waterproof material. Cretesealer DPS, in other words, can be in damp surface construction, most of the other kind of waterproof material can't reach it. In addition because Cretesealer DPS is cold spraying construction, average workload of up to 1000 square meters or more, high benefit and other construction materials incomparable.

Concrete CretesealerDPS shield in the application of tunnel waterproof anti-corrosion

The vast majority of the tunnel in the world or as an urban railway (subway) and road tunnel (railway tunnels and highway tunnel), regardless of the tunnel used for what purpose, its construction method are nothing more than of shield construction method, construction of immersed tube method. According to different construction method, the following key details of shield construction method is the concrete CretesealerDPS used in waterproof, seepage control, corrosion protection.

A, waterproof characteristics of shield construction method

Method of shield tunnel waterproof and there are many ways of classification, the points in the form of the lining structure with single-layer lining waterproof and waterproof double lining; According to the composition of lining are lining the waterproof and lining seams waterproof; According to the tunnel lining of tunnel construction points and shaft joint waterproof, according to the waterproof lining material points with reinforced concrete and cast iron lining.

Waterproof and single-layer lining single-layer lining has much to do with the form, structure, assembling way.

Lining inside the wide, the greater the equivalent mileage in the tunnel inside the seam is less, the smaller the probability of leaking. Also, the less block lining ring, ring longitudinal seam is smaller, the smaller the probability of leaking. , of course, should from the structure of the soil characteristics of the actual project, the Dutch situation, structure characteristics, the calculation model, transport capacity, production assembly factors such as comprehensive consideration.

(a) segment and waterproof and accuracy of block 1, improve oneself the permeability resistance of lining segment, block: 2, increase of the accuracy of the segment, block in the early production;

3, add lining outside waterproof coating, strengthen the permeability of lining and anti-corrosion ability.

(2) seal waterproof lining joint surface (joint)

1, lining seam first, the main line of defense in a gasket (encounter water swelling rubber); 2, lining screw hole sealing waterproof;

3, caulking groove embedded fill seal waterproof material;

4, joint surface shall note sealant groove, using segment screw hole injecting sealant to strengthen waterproof or water culture.

(3) the shield method after the wall of the tunnel backfill grouting

Betting which has the function of anti doped grouting material in the outer wall of lining rings forming ring body together, constitute a "tunnel waterproof barrier". Although it is mainly used to control the ground settlement, but in fact is also a tunnel waterproof lines.

(4) lining anti-corrosion metal lining, metal and concrete in composite lining, concrete lining up the metal pipe and other metal anti-corrosion should also be taken together

(5) double lining waterproofing

In addition to the first lining layer of waterproof, must also consider the inner lining of the waterproof.

(6) of the shaft and tunnel circular joint waterproof

According to the above waterproof characteristics of shield construction method, combined with the feature of concrete CretesealerDPS technology, in the key account outside waterproof lining.