On the frozen lake in the Dongting Lake area, a group of engineers were drilling holes into the ice, and after drilling to a certain depth, they buried prepared explosives.
They are not trying to explode the ice, but intend to use the shock waves generated by the explosion to conduct geological exploration of the underground and determine the location and trend of underground caves.
This is preparation for the digging attack plan formulated by Chen Xin.
Although when Chen Xin designed this plan, he made preparations on how to defend against the destruction of shield machines and tunnels by alien creatures in underground caves. However, if possible, both the military and Chen Xin himself hope to find out. An excavation route that circumvents existing underground caverns.
On the one hand, this can save a lot of trouble. After all, if you can dig directly down to the alien creature's nest without interference, and then attack directly, it will be very worry-free and labor-saving.
This is undoubtedly the most ideal situation for the military.
On the other hand, it is to minimize the construction difficulty during the excavation process.
The shield machine Chen Xin prepared for this excavation task is at least more than seventy meters long and more than ten meters in diameter. If the machine falls due to digging a cavity with such a huge size, it will undoubtedly cause damage to the machine. causing great damage.
Therefore, planning a reasonable excavation route has become an important prerequisite for the implementation of the entire plan.
While these engineers were burying explosives, another group of engineers was cooperating with the engineering personnel to carry out intense construction in the original urban location.
Their task is to dig a large foundation pit here to house the shield machine.
Although this excavation attack does not require digging first and then hoisting the shield machine down like subway construction, it still needs to dig a pit in advance and clear the starting position to facilitate excavation.
After all, the entire shield machine is dozens of meters long and weighs an astonishing amount. The excavation is done diagonally downward at a certain angle. It is impossible for the tail of the entire shield machine to rise to the sky.
At the construction site, Chen Xin was inspecting the progress of the construction.
"The construction schedule is very tight, are you confident to complete the task?" Chen Xin asked the construction leader on the side.
Because both the top management and the military hope to solve the problem in the Dongting Lake area as soon as possible, they are very tight on the construction schedule.
"Please rest assured, we have divided the workers into three shifts, and they will work 24 hours a day to ensure that the construction of the basic tunnel is completed within the specified time!" The person in charge looked very confident with his words.
In fact, the person in charge is really confident about completing the construction. On the one hand, he has sufficient manpower. The military even provided some engineers to assist in the construction.
On the other hand, the construction itself is not a particularly complex or large-scale construction project. It is just a matter of digging a deep pit and completing the foundation tunnel for the shield machine to be erected.
Although the construction requirements are very strict and the construction period is very tight, it is still within the scope of completion. It just needs to be carried out very efficiently without any mistakes and waste of time.
However, this is not a too demanding requirement. As long as there are no errors during the construction, the successful completion of this task can basically be guaranteed.
Chen Xin nodded with satisfaction. Since the person in charge seemed so confident, he naturally wouldn't say anything more.
While the construction was going on, a huge shield machine was being assembled on the side of the construction site.
This is the shield machine Chen Xin needed for this mission after upgrading the system with a finished shield machine ordered from the factory.
He spent almost a week trying repeatedly before finally getting this machine that can dig fifty meters a day.
This machine, Chen Xin, borrowed some concepts and ideas from science fiction movies that he had seen a long time ago, and further improved the cutterhead of the original shield machine.
In addition to improving the material and structural efficiency of the cutterhead, Chen Xin also installed a directional sound wave emitter on the cutterhead.
This is somewhat similar to a sonic cannon. The transmitter will emit ultra-high-frequency sound waves in the direction of excavation to loosen soil, break rocks, and improve excavation efficiency.
In fact, fifty meters a day is not the limit of this machine. According to Chen Xin's design and simulation results, if this machine digs at maximum power, it can even dig more than a hundred meters a day. But in that case, the follow-up Tunnel construction cannot keep up.
Therefore, after careful calculation and evaluation, Chen Xin controlled the excavation speed at the most appropriate speed of fifty meters a day.
This can not only ensure the construction of each section of excavation, but also ensure the speed of excavation without wasting too much time.
According to Chen Xin's estimation, the entire excavation project will need to be excavated down a distance of about 4,000 to 5,000 meters. Because it is excavation diagonally, the distance is several times the vertical depth.
The time he had to prepare for the entire plan was about nine months, and the construction period was about three to four months. The remaining time set aside was for the military to fight.
The military has no objection to this. According to their estimates, if the mother bodies used by alien creatures to produce combat offspring can be successfully removed in the first wave of attacks and their supply of troops is cut off, the military is confident that within three months End the battle within.
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 else is hidden in the alien creatures more than a thousand meters underground.
The military's estimate of the end of the operation in three months is only an estimate based on the current situation.
According to Chen Xin's calculations, even if all goes well with the offensive, it may take the military four to five months to end the entire clearing operation.
If anything unexpected happens, the entire operation will last longer.
Chen Xin also expressed his concerns to the military, and the military also made plans and adjustments for this, but they did not intend to modify the original timetable and still planned to complete the entire cleanup within three months. Combat.
This can't help but make Chen Xin feel a little worried, whether the military is too confident.
However, the combat plan formulated by the military is very rigorous, and all aspects have left sufficient margin for emergencies, and have prepared backup plans. It really does not look like they have excessive self-confidence.
Faced with this situation, Chen Xin had no choice but to put down his worries and focus all his energy on the implementation of the plan.
After all, we have to dig more than a thousand meters underground within three months and launch a large-scale operation. There are a lot of things that need to be considered and prepared. As the proposer of the plan, Chen Xin still has a lot to do. Do.
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