Tower Defense Strategy

There are no waves in May in Tuqiu, or everyone has gradually become accustomed to the bad news that appears once every few days.

The only thing worth mentioning in this month’s confrontation with the monster is that on the southeastern peninsula of Central Continent, a passing star was magnified and opened a knife, creating a long and narrow rift. At the end of the month, there was already a few meters of water at the bottom.

It is obviously not a good thing for Star Break to successfully release a big move, but you can think about it for the better.

Star Shard's big skill rift, its description is a blow to tear the space.

In the place where it was cut, the material disappeared from the earth ball, and it seemed to be connected to other worlds. However, on-site inspections after the battle showed that no monsters in different spaces emerged, and no abnormal substances were detected.

Since no danger has been found, the rift valley cut out by the stars may be used to build a refuge.

Human construction technology looks good, but to build an underground shelter to defend against monster reconnaissance, the construction threshold cannot be crossed in every area.

When a working well with a depth of five to six hundred meters is opened, the temperature below will reach 38 degrees or even higher. If there is an aquifer nearby, the humidity will explode. The difficulty of working on a working face in this environment is several times that of the surface, and the scale of construction is affected. The impact of drilling technology is that the smaller and fewer wells, the slower the project.

At this time, in the large and medium-sized underground bases under construction in country C, the shafts are not the main working face, but are digging down with a small angle of attack of the shield machine. Most of the tunnel work is the expansion of the air-raid shelter, and the ground layer is reduced as much as possible. Additional difficulties and delays caused by changes.

However, country C is an infrastructure madman. Others usually don't have so many tunnels to dig. A country cannot find a few high-end large-scale engineering machines such as shield tunneling machines. In some areas, they even rent or not buy.

The threshold of the shaft is low, but the efficiency of the shaft’s earthwork leaving the site and building materials is limited. Even if all the staff work overtime every day, it will be difficult to build a 100-person base for two years.

The base standard here adopts the refuge standard that was the default in the industry this year.

The first is the ability to detect monsters that are just enough to allow humans to multiply underground, and they mainly rely on geological depth, three-defense fortification-grade concrete or alternative surfaces.

Since it is all about to multiply, then a full set of production and living conditions underground is indispensable.

It is mainly divided into four parts: electricity, ventilation, drainage and sewage treatment, and crop cultivation.

Because the main body of the global industry is a commercial company, the pursuit is profit, education, medical care, etc. are not considered in this standard. At most, a few additional houses are prepared to add some common medical products, which can not form a system.

The four types of underground life are related, and they are all connected to a certain extent.

If you want to pursue the long-term utilization of underground bases, it is undoubtedly the most preferable option to be close to the groundwater layer. However, in actual operation, too close to large underground water sources such as underground lakes will increase the risk of water seepage and collapse, making it impossible to complete the construction.

Therefore, sewage and drainage from underground bases still have to be pumped to the ground for treatment.

The best conditions are not far from the riverbed. Water and electricity can be used. When only the people in the underground base are left alive, no one will come out to make environmental protection, and the sewage can be directly discharged into the river. Or dig pits on the riverbed and use the osmotic decontamination method, which can also produce a little Glauber's salt as a source of materials.

However, the geological complexity of the riverbed is generally higher, and the probability of the occurrence of a groundwater layer is also greater. There are very few locations with a rapid construction environment for large-scale underground projects, and the water sources near more large and medium-sized shelters are small streams.

In this case, thermal power generation has to be considered.

As for nuclear power, just listen to it, not to mention how nuclear power plants persist for several generations. This stuff is stuffed into underground bases. When the radiation protection suits are aging for a few years, it is not easy to say that everyone is not human.

Geothermal power generation is a good choice, but the cost is too high and commercial underground bases will not be considered.

To use thermal power, ventilation is the top priority. In addition to supplying combustion, the ventilation system also needs to discharge waste heat.

Power generation will be linked to the choice of crops.

The lowest cost construction solution is a lower-power generator and mushrooms.

Mushrooms do not need light to grow. The disadvantage is that occasionally people need to be sent out to gather wood, which may increase the risk of exposure to the base.

Since there is no need to maintain the light for crop growth, the power of the generator is reduced, the ventilation load is also small, the diameter of the ventilation pipe is smaller, and all aspects are saved.

But even if it is a low-standard underground base for reproduction, the construction threshold is quite high, and the cracks cut by the stars are now useful.

The fissure cut by Star Smash's big move is nearly 30 kilometers long, and the deepest point is more than 800 meters.

After a period of observation, no signs of lava activity were found, and the temperature of the bottom water was below 40 degrees.

Therefore, this fissure has actually become a natural underground base construction surface.

Although it is necessary to dig a few hundred meters into the rock formation to stay concealed, no matter what, the horizontal operation is much less difficult than the vertical shaft operation. By repairing a side road along the slope, you can directly drive the loading truck and other engineering vehicles into it. On the construction side, the engineering threshold was lowered to an acceptable level.

In addition to multiplying refuges, the "universal" refuges previously built in South Heizhou have also developed in various places.

This kind of shelters are all converted from abandoned mines. If the transportation is gradually interrupted over a period of time, the mines that are in use may be requisitioned.

The advantage of the mine is that the internal volume is large enough, and some have power lines, and some mines can meet the concealment requirements at the depth of the mine. The overall project volume is small, and it is more suitable for being converted into a base for tens of thousands of people to live.

There are also many shortcomings. The collapse of the structure is almost inevitable. It can only be simple because of the rudimentary. The ventilation and sewage are often difficult to meet the long-term living requirements of a bunch of people.

But at least there are more places in this type of shelter, which can better calm the public's emotions.

In fact, the cultural and media environment in most regions has caused the vast majority of people to fail to realize the importance of human reproduction and knowledge inheritance after the disaster. In their eyes, a bed in the refuge is enough. In order to meet this demand, most of the “universal” commercial refuges built by under-strength companies simply don’t care what crops and sewage are discharged, they directly connect with doomsday food suppliers and put a bunch of them in the refuge with a shelf life of several decades. The food is vacuum-dried, and the sewage is discharged directly into the depths of the pit.

Even if this type of inferior shelter does not happen to be captured by a monster, it is expected that the people inside will eventually die from the epidemic.

After introducing the commercial ones, the rest is non-commercial.

There are also three categories.

The first type is charitable nature, which can be called a mortuary-style refuge, which is more difficult to meet the requirements of long-term life than the inferior commercial "universal type".

In addition to mines, there are other types of refuges that have no entity at all. There are only plans. After the city is completed, the subway system will be occupied as a refuge, but the subway actually does not meet the concealment requirements. Now it is mainly used for personnel transfer during combat. .

The second category is the self-help category of wealthy businessmen and consortia, which are called "elite" to the outside world, and they are also the earliest type in response to monster crises.

In some areas, the self-help category of the consortium represents the highest level of shelter construction. Not only does the construction standard of each system higher, but also often contains a large amount of literature, technology, history, and art materials.

It is impossible for the super rich and powerful to farm and defend bases full-time. They can only be personal interests at most. Therefore, such refuges will also attract other people to do professional affairs. Of course, most of them are personnel in the consortium system.

The third category is similar to the permanent underground fortifications in country C that have MEK25, BEK-B and other advanced weapons quotas.

Take a base that has been numbered as an example.

Song Emperor Palace, communication number CJ008.

This Song emperor was not an ancient emperor, but one of the hells in the underworld in a certain religion. The meaning is obvious. If human beings live underground forever, isn't it like being in the underworld? Although the environment will not be so outrageous, there will be no difference in psychological perception.

Song Emperor Palace is located on the bank of the big river, with three construction working faces.

One is a half-completed subway extension line, which is dug obliquely downwards; the other is to extend the construction surface of the sewage treatment plant; the last is a new **** tunnel from the ground near the railway station in the small town next to the big city .

The No. 3 working face tunnel is the largest, and it was directly dug out by a shield machine with a diameter of 12 meters. Such a large tunnel face is enough to realize the separation of upper, middle and lower layers.

The project involves a large area. By the way, two two military facilities have been opened~www.wuxiaspot.com~ They are the products of nuclear war prevention decades ago. They have emergency zones located tens of meters underground and are now opened in them. The additional shaft working surface will be used as a backup access site later.

The working face on the side of the subway extension line had already hit the main work area, an underground lake, as early as February.

Then came to the wild-drain the lake!

This is the fastest way to excavate the largest space for use after field research.

In order to cooperate with this action, there are other working groups in the upper reaches. Before draining, there were several more surface fountains in the upper reaches, forming a new surface river, which flowed more than ten kilometers into the river.

In March, the sewage treatment plant was facing the main work area, and drainage operations were added. In April, part of the underground lake was drained. A large number of engineering machinery and construction materials entered. While expanding the space, adding three-proof concrete layer and artificial support structure, while starting Build a camp.

By the end of May, there was already a basic functional area capable of accommodating two thousand people, but this part is made of light steel and prefabricated structures, which is not a permanent fortification.

The progress is average, but the monster will not be able to wipe out the world for a while, there is still time.