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Why should the underground engineering use the structure to be self-waterproof?

Why should the underground engineering use the structure to be self-waterproof?

(Summary description)

Why should the underground engineering use the structure to be self-waterproof?

(Summary description)

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Underground engineering refers to the underground civil engineering built deep below the ground for the development and utilization of underground space resources, including underground houses and underground structures, underground railway, road tunnels, underwater tunnels, underground tunnels, underground common ditches and underground passageways, etc.

The construction of underground engineering is complex, especially for the durability of the structure, among which the waterproof and seepage resistance performance is one of the important indicators.For this reason, many underground projects choose the structure from the waterproof as the main body waterproof, what are the reasons behind it?

Underground works such as the basement is always below the ground, surrounded by soil, soil water content, which makes the underground space surrounded by water for a long time, and slowly penetrate inward.

The main structure of the underground space is generally concrete, and the internal capillary pores and subtle cracks will accelerate the internal seepage of water. In the long run, the water leakage becomes more and more intense.

Some people may say that the outside of the basement will be used with waterproof roll to build a U-type waterproof shield, is it possible to avoid the infiltration of water?There is really no problem, just ignore a detail, the water state of the underground space is uncertain.

Groundwater is sometimes static water, sometimes dynamic water, in a word, groundwater in the continuous movement of the change.

The joint surface of the bottom plate and the shear wall is generally difficult to achieve comprehensive connection. When the underground water level is higher than the cushion, the water will directly not pass the junction point and enter the structural layer. Once the water enters the waterproof coil interior, the horizontal, longitudinal water string is inevitable, and the waterproof coil is useless.

So this is why the basement leakage rate in the water stop plate, because this is most of the water inlet point.

In addition, the "Housing and Urban-Rural Development Code" published by the Ministry of Housing and Urban-Rural Development requires that the residential building design working years should meet: roof and toilet waterproof not less than 20 years; basement waterproof not less than the working years of structural design.

The waterproof rolling material life of 10 to 20 years won't work here.

To achieve this requirement, it is necessary to greatly improve the waterproof protection effect of the structure itself, and the building to achieve the effect of the same life of underground engineering through the structure self-waterproof.

To sum up: underground engineering is more suitable and should use structural self-waterproof as the main waterproof.

However, it is not easy to do the underground engineering structure from the waterproof, the first problem is to choose the good materials, including choosing the right materials and the best materials.

The SJ-1 self-healing inorganic proliferator developed by the scientific research team from Tsinghua University is the leader of structural self-waterproof materials, which has won the EU CE certification.

Data from the inspection report issued by the National Construction Engineering Quality Supervision and Inspection Center show that the concrete mixed with SJ-1 self-healing inorganic proliferator has a very obvious effect in improving the impermeability performance. The second permeability pressure is still larger than the first permeability pressure, which can be seen that the product is rapidly self-healing.

Compared with traditional waterproof, the concrete of SJ-1 self-healing inorganic proliferator has good waterproof performance, save the additional waterproof layer construction, the construction period saves more than 30% of underground engineering, underground waterproof engineering investment cost saves more than 15%, and waterproof years and the same life of concrete structure, meet the requirements of the new standard standards for years of waterproof engineering.

For the weak waterproof joints such as cold joints, Yin and Yang angle and afterpouring belt existing in the underground engineering construction, the concrete mixed with SJ-1 self-healing inorganic proliferator can be easily solved.

The SJ-1 self-healing inorganic proliferator is selected for the self-waterproof of the underground engineering structure, which not only greatly improves the waterproof and seepage resistance effect of the concrete structure itself, but also activates the "self-healing" performance of the concrete, realizes the waterproof effect and the same life of the structure, and truly creates a century-old underground project.

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