Doomsday Bunker Upgrade Chapter 697: Program begins

On the frozen lake in the Dongting Lake area, a group of sappers are drilling holes into the ice layer and burying the prepared explosives after drilling to a certain depth.

They did not intend to blast the ice, but to use the shock waves generated by the explosion to conduct geological exploration of the ground and determine the location and trend of the underground caves.

This is in preparation for the tunneling attack plan formulated by Chen Xin.

Although Chen Xin made preparations for how to defend against the destruction of shield machines and tunnels by alien creatures in underground caves when he designed this plan, if possible, both the military and Chen Xin himself would Hoping to find a way to get around those existing underground caves.

On the one hand, it can save a lot of trouble. After all, if you can directly dig down to the nest of alien creatures without interference, and then attack directly, it is really very worry-free and labor-saving.

This is undoubtedly the ideal state for the military.

As for the other hand, it is to reduce the construction difficulty during the excavation process as much as possible.

The shield machine prepared by Chen Xin for this excavation mission is at least 70 meters long and more than ten meters in diameter. will cause great damage to the machine.

So planning a reasonable excavation route has become an important prerequisite for the implementation of the entire plan.

While these sappers were burying the explosives, in the original urban location, another group of sappers were cooperating with the engineers to carry out intense construction.

Their task is to dig a large foundation pit here for the shield machine.

Although this excavation attack is not like building a subway, you need to dig down first and then hang the shield machine, but you still need to dig a hole in advance to clear the starting position to facilitate the excavation.

After all, the whole shield machine is tens of meters long, and the weight is amazing, and the digging is inclined downward at a certain angle. It is impossible for the tail of the whole shield machine to be lifted into the sky.

At the construction site, Chen Xin is inspecting the progress of the construction.

"The construction period is very tight, do you have the confidence to complete the task?" Chen Xin asked the construction supervisor beside him.

Because both the high-level and the military want to solve the problems in the Dongting Lake area as soon as possible, they are very concerned about the construction period card.

"Please rest assured, we have divided the workers into three shifts, and kept the machines off 24 hours a day to ensure that the construction of the foundation tunnel will be completed within the specified time!" The person in charge seemed very confident .

Actually, the person in charge is very confident about the completion of the construction. On the one hand, he has sufficient manpower, and the military even provided some engineering troops to assist in the construction.

On the other hand, the construction itself is not a particularly complicated construction with a large amount of work. It is just to dig a deep pit and complete the foundation tunnel for the shield machine installation.

Although the construction requirements are very strict and the construction period is very tight, it is still within a range that can be completed, but the construction needs to be carried out very efficiently, and there is no time for mistakes and waste.

However, this is not too harsh. As long as there are no mistakes in the construction, the task can basically be completed smoothly.

Chen Xin nodded with satisfaction. Since the person in charge was so confident, he naturally wouldn't say anything more.

While construction was in progress, a huge shield machine was being assembled beside the construction site.

This is the shield machine that Chen Xin got for this mission after upgrading the system with a finished shield machine ordered from the factory.

It took him almost a week of trial and error before finally getting a machine that can dig fifty meters a day.

Chen Xin borrowed concepts and ideas from some sci-fi movies he had seen a long time ago, and further improved the cutter head of the original shield machine.

In addition to improving the material and structural efficiency of the cutter head, Chen Xin also installed a directional acoustic wave transmitter on the cutter head.

This is somewhat similar to a sonic cannon. The launcher will emit ultra-high frequency sound waves in the direction of the excavation, so as to loosen the soil, break the rock, and improve the excavation efficiency.

In fact, 50 meters a day is not the limit of this machine. According to Chen Xin's design and simulation results, if this machine is excavating at maximum power, it can even excavate more than 100 meters a day at most, but In that case, the subsequent tunnel construction will not be able to keep up.

So after careful calculation and evaluation, Chen Xin controlled the excavation speed to the most suitable speed of 50 meters a day.

This can not only ensure the construction of each section of the excavation, but also ensure the speed of the excavation, and will not delay too much time.

According to Chen Xin's estimate, the entire excavation project needs to be excavated for a distance of about 4,000 to 5,000 kilometers. Because it is an oblique excavation, the distance is several times the vertical depth.

The time he had prepared for the whole plan was about nine months, and the construction period was about three to four months. The rest of the time set aside was for the military's combat time.

The military has no objection to this. According to their estimates, if the parent body of the alien creatures used to produce the fighting offspring can be successfully removed in the first wave of attack, and their supply of troops is cut off, then the military is confident that the End the fight within three months.

Chen Xin is not optimistic about this. He is always worried that there are higher-level units of alien creatures, and it is uncertain what the alien creatures are hiding more than a thousand meters underground.

The military's estimate of the end of the war in three months ~IndoMTL.com~ is only an estimate based on the current situation.

According to Chen Xin's calculations, even if the offensive goes well, it may take four to five months for the military to end the entire campaign.

If anything goes wrong, the entire operation will last longer.

Chen Xin also expressed his concerns to the military. The military also made plans and adjustments for this, but they did not plan to revise the original timetable and still planned to complete it within three months. All clearing operations.

This inevitably makes Chen Xin feel a little worried, whether the military is too confident.

However, the battle plan formulated by the military is very rigorous, and all aspects have left enough margin for emergencies, and have prepared backup plans. It really doesn't look like there is excess self-confidence.

Faced with this situation, Chen Xin had no choice but to let go of his worries and focus all his energy on the implementation of this plan.

After all, to dig to a depth of more than 1,000 meters underground within three months, and to launch a large-scale operation, there are many things that need to be considered and prepared. As the proposer of the plan, Chen Xin also has Lots to do.