In less than ten minutes, under the condition that Yan Gong looked at the level, the foundation pit was roughly dug to the elevation, and a large amount of water overflowed from under the sand layer.

"Okay, bury this pit some, and then transport all the soil layers above the sand layer out, and don't excavate the sand layer down. ▲ ∴ top ▲ ∴ point ▲ ∴ small ▲ ∴ said, "After understanding the specific construction site, Zhang Xiaoyun commanded.

Obviously, a meter of water, and still in the sand layer, the catchment wells are no longer working, and the precipitation wells must be used.

But to use the precipitation well, Zhang Xiaoyun and Shu Cheng couldn't make a decision.

"Call Lao Ren and explain the situation to him." Zhang Xiaoyun said to Shu Cheng.

"Yes." Shu Cheng felt that he really had to report to the leader, after all, the foundation pit was about to be excavated, and the water would not be able to fall at that time, so it was likely to lead the construction and delay the construction period.

Subsequently, Shu Cheng dialed Ren Changhong's phone.

"Hey, Xiao Shu." Ren Changhong's unique voice sounded in Shu Cheng's ears.

"Manager Ren, that's the case, Shangyunzhuang's leveling and establishment, yesterday began to excavate the foundation pit, just found that more than two meters below is a layer of sand, more than one meter of water depth, the collection well is terrible." Shu Cheng will explain the on-site situation in general, in fact, a deputy manager like Ren Changhong, who has extremely rich experience in on-site construction, as long as Shu Cheng explains a little, it will be fine.

"There is water so deep?" Ren Changhong was still a little surprised by Shu Cheng's words.

"Yes, just now Team Zhang and I have dug the design elevation of the foundation pit, measured it with a tower ruler, the water depth is a little more than one meter, and the flow rate is relatively fast!" Shucheng Road.

"Well, you and Xiaoyun wait for a while, I happened to have a meeting here in Tai/Zhou Jianzhi, and I went over with Manager Zhang to have a look." Ren Changhong said.

"Okay." Shu Cheng said, hung up the phone, then looked at Zhang Xiaoyun, and said, "Team Zhang, Manager Zhang and Manager Ren are having a meeting in Jianzhi, and they will come over in a while." ”

"Cheng, then it's time to decide!"

In about 20 minutes, the Mitsubishi car lifted the sand layer and drove into the construction site of Pingjiaoli.

Zhang Tianhu and Ren Changhong stepped out of the car.

Zhang Xiaoyun, Shu Cheng and Yan Gong, the technical leader of the construction team, stepped forward to greet the two together.

"What's the matter, why is the water so deep?" Ren Changhong obviously explained the situation to Zhang Tianhu, walked towards the foundation pit, and asked as he walked.

"Lao Yan, let the excavator dig it out and show it to Manager Zhang and Manager Ren." Seeing Zhang Tianhu's skeptical tone, Zhang Xiaoyun directly ordered the construction team.

As soon as Zhang Xiaoyun finished speaking, the excavator master picked up the shovel and continued to excavate in the foundation pit that had only been partially filled just now.

Shu Cheng couldn't help but glance at Zhang Xiaoyun, if the general person in charge of the site would definitely fill it all in when digging the foundation pit, but Zhang Xiaoyun only filled in half of it, as if he knew that Zhang Tianhu and Ren Changhong were coming.

I deliberately didn't bury all of them, but only part of them, because if I didn't bury them, the water level would be too deep, and the surrounding sand would collapse.

In less than three minutes, the general elevation was in place, and Lao Yan arranged for someone to measure the depth of the water level, more than one meter.

"More than a metre deep, the catchment well is unusable." Ren Changhong said, turned his head to Shucheng, and said: "You guys have come up with a set of plans technically, use precipitation wells, see how deep they are, drill a few, and how to arrange them." ”

"Okay." Shu Cheng responded simply and clearly.

"Well, let's rain first, and after all the soil above the sand layer is poured out, wait for the water to fall before excavating." Zhang Tianhu also said the same.

"Zhang Xiaoyun, you contact the people in the big well, according to the technical settings, do your best to construct the precipitation well, and continue to excavate." Ren Changhong added.

"Okay, Manager Ren!" Zhang Xiaoyun said.

The leaders of the two project departments said so, and the matter was almost settled.

The next thing is Shucheng's business again.

In fact, to be honest, the step-by-step work on the construction site is really easy to do, and I am afraid of encountering various emergencies. But as a project, emergencies are very normal, and how to learn to deal with these emergencies reflects a person's ability.

Shangyunzhuang's simple flat reconstruction, from the beginning of the lack of drawings, to the design of sliding bed and distribution beams, H-shaped I-beams, and then the current groundwater level is high, requiring the use of precipitation wells.

This set of things, many construction technicians who have worked for two or three years, may not be able to solve it, even if it is Shucheng in the previous life, it cannot be solved perfectly.

However, Shucheng, who has more than 20 years of construction experience in his previous life, is very handy in dealing with these problems.

Next, for the setting of precipitation wells, how many are set up, and how deep are the precipitation wells, these things are completely inseparable from the construction experience.

Ordinary people calculate the depth of the precipitation well, and feel that as long as it is about five meters below the water level, it is about the same, plus the original foundation pit height, drilling a 10-meter precipitation well, theoretically can meet the requirements, but the actual situation is not so.

After Zhang Tianhu and Ren Changhong left, Zhang Xiaoyun sat on the Mazha and said to Shu Cheng with a smile: "Minister Shu, how many precipitation wells are you going to arrange?" What is the approximate depth? ”

Obviously, Zhang Xiaoyun is testing Shucheng, Zhang Xiaoyun has been working for more than 20 years, and he has encountered a lot of this kind of thing, and he is very handy with things like precipitation wells.

Although they do not know the theoretical knowledge, they have extremely rich experience in the field, and the general technical personnel are not their opponents at all.

Facing Zhang Xiaoyun's question, Shu Cheng smiled slightly, pondered for a moment and said: "According to the current situation on the scene, the height from the top of the foundation pit to the sand layer is less than 5 meters, just take 5 meters to calculate, the precipitation well should be at least 12 meters to 15 meters, 10 meters can not meet the requirements, because in the process of pumping, although there is a concrete pipe to block the sand from pouring into the precipitation well, it will also be deposited, and over time, the depth of the precipitation well will be reduced, and the bottom will be covered with sand and water, so that the water pump will be lifted." ”

Shu Cheng is talking about what will happen on the spot, and theoretically, because the concrete pipe protects the sand layer on both sides, people will ignore that the sand will sink to the bottom.

In actual construction, as the water is pumped out, the sand layer at the bottom of the dewatering well is getting thicker and thicker, and with the passage of time, the depth of the dewatering well decreases, and the pump has to be lifted upward.

Shu Cheng said this, paused for a moment, and continued: "If it is a water depth of five meters, we need construction, and we need at least 2.5 meters of precipitation, that is to say, we only have a water depth of 2.5 meters for us to pump water. ”

Once the pump can't pump water and continues to work, the pump may burn out!

Hearing Shu Cheng's explanation, Zhang Xiaoyun was directly stunned, although Shu Cheng was the deputy minister of the Technology Department, Zhang Xiaoyun had rich construction experience and didn't take Shu Cheng very seriously.

Just took advantage of the matter of the precipitation well to test Shucheng, but I didn't expect Shucheng to be able to say it, how could he not surprise Zhang Xiaoyun?

"You've worked in a precipitation well before?" Zhang Xiaoyun asked after a moment's pause.

"No, it's the first time to do it, but this situation does have to be considered, my construction is to drill 15 meters deep, just in case, after all, anything will happen in the construction project, and the depth of the precipitation well is higher for us." Shu Cheng shook his head and continued: "As for setting up a few, I have set up six around the foundation pit, three on one side, and two on the other side of the line, in case the water level under the line is high when the jacking is high, and it will be troublesome to plant the head when the time comes." ”

The so-called planting head, just like what we usually say, planting and fighting, in the process of jacking, one end is planted downward, and the other is cocked. In the construction of flat and vertical jacking, where the soil quality is not good, this situation also often occurs.

"Well, your thoughts are similar to what I thought, so let's do it!" Zhang Xiaoyun couldn't refute Shu Cheng's words, so he could only agree.

No way, who called what Shu Cheng said reasonable?

The next thing turned to Shucheng.

Since it has been decided to use the precipitation well, then the preparation of materials has to be prepared in Shucheng, to put it bluntly, the preparation of materials is to make some quantity lists, so that the material department of the project department arranges people to buy.

Because the precipitation wells are generally 60cm in diameter, when the hole is drilled, a section of 1 meter long, 60cm diameter concrete pipe will be under the same principle as the rural well.

A precipitation well has fifteen concrete pipes, a total of 8, in addition to a water pump and a water belt, the water pump is a pump, the small one must not work, the large pump must be large.

And the water bag is to put it bluntly, it is the roll of things used for firefighting, sending water out.

The length of the hose depends on the actual situation of the site, depending on where the water is pumped and how many of the 8 precipitation wells are needed in total.

This series of things are all things that Shucheng needs to consider, and I have to admit that it is difficult for you to do the project without some construction experience!