Bao Feiyang also nodded, and almost immediately rejected the plan. To dig a pit 25 meters deep, regardless of the difficulty of the project, in terms of the amount of earthwork alone, it is a very staggering figure.

The size of the excavator itself is relatively large, even if it is three meters wide and five meters long, the working surface required is at least several times, and it is calculated by four times, then it needs 60 square meters, 25 meters deep, that is, 1200 cubic meters, an excavator excavates 100 cubic meters an hour, which is relatively high efficiency, and it will take ten hours.

So, is it okay to add excavators? Of course, but the excavator excavation construction is not on the plane, but to dig more than 20 meters deep underground. What is the concept of more than 20 meters deep? If you calculate the depth of a building of more than 20 meters, it is as high as an eight-story building.

If it is a flat excavation, it is easy to place more excavators for construction. But to dig into the ground, each excavator needs space to work, and the excavated soil needs to be transported away, which requires space, and increasing the number of excavators means increasing the area of excavation, otherwise the excavator can not be used at all.

And this is all an ideal state to consider, in fact, if you want to dig a pit more than 20 meters deep, there are too many problems to consider. It's easy to dig a meter or two deep, but if you dig five meters deep, you may encounter a landslide, and if you dig to a depth of 10 meters, if you don't do any engineering protection, it will definitely collapse.

In addition to the landslide, we also have to consider the geological conditions, the well is on the mountain, there are stones on the mountain, if the rock layer is dug, the excavator will not be able to dig down.

In addition, there is the problem of water seepage, even if it is on the mountain, judging by the depth of the water in the well, it should be above the sea level, but there is water in the mountain, which can also cause water seepage.

In short, ordinary people may think that digging a big pit is simple, but when the pit has reached a depth of more than twenty meters, it is not simple. Otherwise, we could have built the building underneath. Why is it that most underground garages have only one floor, two floors, or at most three floors?

The construction of the underground garage is still under the condition that the construction conditions are very relaxed, and now to rescue the children in the well, the most critical thing is time, and the sooner the better.

"What's the third plan?" asked Bao Feiyang, who was considering what good way to get the child out of the way while rejecting the excavator's plan to dig a pit. However, he also trusts the judgment of professionals more, and if there is a good way, the fire brigade should know better.

"Another way is ......"

Chen Yucheng just said this, suddenly the SWAT captain ran over and whispered a few words in his ear, Chen Yucheng hurriedly said hello to Bao Feiyang: "Feiyang, the Tongbei City Fire Brigade has arrived, I have to discuss the rescue plan with them, and I will call you later." ”

"Okay!"

Bao Feiyang nodded: "You go, I'm already on my way over, now you don't have to think about anything, first find a way to rescue people." ”

Hanging up Chen Yucheng's phone, Bao Feiyang couldn't help frowning, he thought about it, and then called the Fenglin City Fire Detachment in Northern Province.

The fire detachment is under the management of the police department, Bao Feiyang served as the police chief in Fenglin City, and Zhao Linsheng, the head of the Fenglin City Fire Detachment, received a call from Bao Feiyang and was immediately very respectful and enthusiastic.

Bao Feiyang has not served as the police chief of Fenglin City for a long time, but he has established authority in the bureau, and everyone in the bureau knows that although the director is young, he has a very strong work ability, and he is also very righteous, in short, he is a very rare good leader.

After Bao Feiyang left, the people in the bureau were also very surprised when they talked about him.

"Captain Zhao, there is a very urgent matter I want to ask you this time, that is, there is a child who fell into a well more than 20 meters deep and got stuck there, in addition to putting the rope and digging it with an excavator, what other good way to save people?"

"There are still a lot of children falling into deep wells in our northern provinces, especially in some mountainous areas, because of the inconvenience of irrigation, wells often have to be dug, and many wells are abandoned after running out of water......

Zhao Linsheng knew that the matter was urgent, he briefly said about the situation and said: "This situation is indeed very troublesome, at present we have no good way, in addition to putting ropes and excavation, the bureau has also proposed the use of trenchless drilling technology, that is, to drill a deep well that adults can enter next to it, and then carry out horizontal excavation, open up two wells, and rescue people......

"In addition, there is the use of large-diameter cast-in-place pile technology used in construction engineering for pilot tunnel rescue, and directional drilling technology......"

Chen Linsheng said: "The rescue speed of these methods is faster, but it is more restricted by the rescue environment, and the cost will be relatively large, and the technical requirements are relatively high......

Bao Feiyang listened, his brows couldn't help frowning more and more, he seemed to think about things a little simpler, and it was far more difficult than he imagined to rescue people from a well more than twenty meters deep.

************************

In addition to Xu Hu, the captain of the Tongbei City Fire Brigade, there was also Xu Hu's immediate boss, Zhang Guangcheng, director of the Tongbei City Police Department.

After seeing Chen Yucheng, Zhang Guangcheng immediately reported to him: "Secretary Chen, Captain Xu and I have already gone to the scene to investigate, please report to you about the specific situation!"

Chen Yucheng nodded and looked at Xu Hu.

"Secretary Chen, the child is stuck in a well more than 20 meters deep, his age is too young, and the state is very bad, there is no way to buckle the rope buckle on the ......" Xu Hu, the captain of the fire brigade, reported to Chen Yucheng: "In this case, the conventional way is to drill a well next to it, and then dig horizontally, open up two wells, and save people......"

"Then hurry up, the sooner the better!" Chen Yucheng said hurriedly.

Xu Hu nodded: "Yes, I have already asked people to contact me, but I just took a look and asked the villagers here, it is likely that there are stones under this mountain, if it is a stone, then it will be very difficult to dig a well below, and even if this well is dug later, there is no way to dig to the side." ”

Chen Yucheng couldn't help frowning: "Have you learned about the situation on the mountain from the villagers?"

"I understand, the villagers said that there are stones under this mountain, and from the section of the cliff, it is indeed rock, and it is hard granite!" Xu Hu said: "However, the situation next to the dry well is not very clear, but it is very likely that there is a rock formation underneath." ”

"Does the well-drilling team know about this situation? Did they say that if there is a rock formation underneath, they can drill a well?" asked Chen Yucheng.

Xu Hu shook his head: "The people of the well drilling team said that if it is a rock formation, their equipment will definitely not be able to drill a well below, and even if a well is drilled, there is no way to dig to the side. ”

"Then are there any other plans?" Chen Yucheng couldn't help frowning.

"The life of the children in the well is at stake, we must hurry up, now we have to prepare for the worst, if the well drilling team comes, find that the method of drilling the well does not work, we must immediately take other methods, so now we must make a plan, and start to act, immediately contact the rescue personnel and rescue equipment, can not wait until the well drilling team finds that it is not possible, and then arrange and contact, then it will be too late!" Chen Yucheng said very urgently, he knew very well that if the child had an accident, it would be difficult for him and the SWAT team to explain, and now there were people from the Ding family and Dingfang Village who thought that the action of the SWAT team scared the child, and the child would fall into the well.

Hearing Chen Yucheng's words, Xu Hu glanced at Zhang Guangcheng next to him, Zhang Guangcheng did not speak, but a trace of contempt flashed in his eyes, and he nodded imperceptibly.

It stands to reason that Chen Yucheng, as a senior legal and political official of Tongcheng City and the chief of the police department, is Zhang Guangcheng's direct leader, and Zhang Guangcheng should unconditionally carry out Chen Yucheng's instructions.

However, the local police system is unique in that it is under the dual leadership of the local and police systems. That is to say, the director of the Tongbei City Police Department must be under the leadership of the Tongcheng City Legal and Political Commissar and the Tongcheng City Police Department, as well as the Tongbei Municipal Party Committee and the Tongbei City Legal and Political Commissar.

And Zhang Guangcheng was promoted by Guo Hongjun, a high-ranking official of Tongbei City, who originally wanted to be transferred to the city this time to fight for the position of member of the Standing Committee of the Tongcheng Municipal Party Committee and executive vice mayor. Although they are all members of the Standing Committee of the Municipal Party Committee, the senior officials of Tongbei City are still worthy of the name, and they are not bad compared to the executive vice mayor of Tongcheng City, but Guo Hongjun is eyeing the position of the mayor of Tongcheng City, he has served as a senior official of Tongbei City, if he can serve as the executive deputy mayor of Tongcheng City, he will have enough qualifications to serve as the mayor of Tongcheng City when he is re-elected next year.

Guo Hongjun has been working in Tongbei City before, and his resume is relatively simple, so whether he can serve as the executive deputy mayor of Tongcheng City will have a great impact on his future promotion.

For this reason, Guohongjun spent a lot of effort to operate, and it was about to succeed, but there was news in the province that Chen Yucheng would be parachuted into Tongcheng City to serve as the executive deputy mayor.

Guo Hongjun saw that the executive vice mayor who was about to run away, of course he was unwilling, so he ran to the province to find leaders, not wanting to let this position fall aside, and finally Chen Yucheng did not serve as the executive vice mayor, but became a member of the Standing Committee of the Municipal Party Committee and a senior legal official, and the position of executive deputy mayor was not given to Guo Hongjun, but to others.

Guo Hongjun thought that this must be Chen Yucheng's obstacle, so the city held a standing committee, Guo Hongjun always went against Chen Yucheng, Chen Yucheng to Tongcheng has not been for a long time, and the two have had several small conflicts.

Guo Hongjun made cruel remarks in front of Zhang Guangcheng, in the city, he wanted to make Chen Yucheng uncomfortable, but in Tongbei City, he wanted to make Chen Yucheng unable to stretch out a finger......

Of course, Guo Hongjun's words were said in private, but Zhang Guangcheng didn't dare to forget, so he usually disobeyed the affairs of the city bureau, and was vain and wronged, today Chen Yucheng personally called him, Zhang Guangcheng also found an excuse to pull away, and sang an empty city plan to Chen Yucheng, but he didn't expect Chen Yucheng to personally lead the SWAT team to kill him.

Zhang Guangcheng also knew that today he offended Chen Yucheng to death. However, he is not worried, as the director of the Tongbei City Police Bureau, Chen Yucheng must pass through the Tongbei Municipal Party Committee if he wants to move him, and Guo Hongjun's side will definitely not be able to pass, so he is not afraid that Chen Yucheng will target him.

And he came here now because after he heard about the child falling into the well, he immediately realized that this was an opportunity to bring down Chen Yucheng. Of course, Chen Yucheng's backers in the province are too powerful, and it is not easy to bring him down, but it is still okay to make some trouble for him, so he will rush over immediately.

After receiving Zhang Guangcheng's signal, Xu Hu said: "We must follow Secretary Chen's instructions, and I will let people arrange them." ”

"But ......"

Xu Hu hesitated for a moment and then continued: "In addition to drilling wells, we also have two alternatives, one is to use the large-diameter cast-in-place pile technology used in construction projects, if it is an ordinary soil layer, you can dig ten meters in two hours, and you can dig twenty meters in about four hours, and then carry out lateral excavation......

"Compared with ordinary drilling teams, large-diameter cast-in-place piles can be dug faster, especially in harder soil layers, and the ability is stronger. However, if it is really a hard granite layer, even cast-in-place pile technology cannot do anything. Xu Hu said.

Chen Yucheng nodded, he also knew that Tongcheng City was located in the lower reaches of the Tianjiang River, although there were also a few hills in the territory, but most of the area was alluvial plains, and most of the equipment of the construction team was for ordinary terrain, and would not specially prepare equipment that could drill rock formations.

Although Chen Yucheng, a senior legal and political official and police chief, is not from a criminal investigation background, he has worked beside the leaders all the year round, and has long developed a set of skills to observe words and feelings, after all, if Chen Yucheng is a stunned young man, he will definitely not be able to follow Wang Hongfeng for so many years, and get Wang Hongfeng's trust.

Chen Yucheng naturally saw the exchange between Xu Hu and Zhang Guangcheng, and he knew that Zhang Guangcheng and Xu Hu might not be dedicated to this matter, and might even pit him.

Chen Yucheng is not a rookie in the officialdom, he has followed Wang Hongfeng for so many years, under Wang Hongfeng's ears and eyes, what scene has he not experienced? Of course, he will not be so simple as to believe these two subordinates of Tongbei City, let alone be cheated and unknown.

Don't look at Xu Hu said so many plans, it seems that the well drilling team and cast-in-place piles may or may not work, but Chen Yucheng is not stupid, he has also learned about the situation here before, and knows that although this hill is not big, it is very likely that there are stones below. The construction team, I'm afraid there is no way to drill through the rock formation, if according to Xu Hu's plan, in the end these two plans are likely to be unworkable, if Chen Yucheng pins his hopes on these two methods, he will be caught off guard by then, and it is likely that there will be no time to arrange other plans.