The power of money is powerful, and by the time Shu Cheng and Han Zhao went to work in the afternoon, Wan Yong had already wrapped the repaired pillars as gifts, and there was no need for Shu Cheng to arrange them. + Top Novel,

The pillars, wrapped like mummies, are wrapped in layers of film, waving in the cold wind!

There are a few pillars left that have not been dismantled and repaired, and the two repairers are struggling to catch up.

Seeing that the arrangements were in place, Shu Cheng went around the construction site of the signal building and went directly to the construction site on the side of Pinggaili.

When he came to the construction site, Zhang Xiaoyun was already squatting at the site, bragging with the construction team.

Shucheng came to the edge of the foundation pit, and now the excavation of the foundation pit has only been carried out to two-fifths, and even half of it has not been completed, and it seems that it will take another day to finish digging.

The deepest part is still more than two meters away from the elevation, and judging from the existing soil samples, there may not be water after reaching the elevation.

Even half a meter of water does not matter, you can use the water collection well to drain the surrounding water to the collection well, and then use the pumping machine to pump the water away, which can prevent the foundation pit from collapsing due to the impact of the water flow.

Unless the water depth is more than one metre, the water from the catchment well may not be sufficient, and other methods of precipitation are required.

"Minister Shu, how many is the slope on your side?" Seeing Shu Cheng coming to the construction site, Zhang Xiaoyun came over and asked.

The technical disclosure of excavation, before construction, Shucheng has been sent to the construction team and the operation team, it stands to reason that Zhang Xiaoyun should not know.

"A slope of 1 to 0.5." Shucheng Road, these are the contents written on the technical disclosure.

Zhang Xiaoyun was silent for a moment, with a hint of an elder's tone, pointed down, and said: "Oh, brother, your slope is more than 0.5, it's hard for me, although it is said that it is a soil layer above, but two meters below, you can see for yourself, the sand layer has been exposed, such a steep slope construction is very troublesome, and it is extremely dangerous." ”

Indeed, as Zhang Xiaoyun said, the slope of 1 to 0.5 is extremely steep. It is equivalent to a vertical height of five meters, and the lateral distance is only two meters and a half!

Looking at the location pointed by Zhang Xiaoyun, that place is the deepest place where the foundation pit is temporarily excavated, and the sand layer is really exposed, but the groundwater has not been found for the time being.

"Brother Zhang, I also know this, but you have also heard the words of the leader, the right side of the foundation pit should be used as a construction road, and the earthwork of the roadbed can only be entered from here, and the left side is a fish pond, which cannot be destroyed, so there is no way to do it." Shucheng Road.

Since Shangyunzhuang Station is surrounded by villages, there is no major road leading to the throat on the east side of Shangyunzhuang Station, which also means that the earthwork cannot be transported to it at all.

This time, the frame culvert was built to open up a construction road behind the frame culvert to facilitate the transportation of earthwork.

However, due to the limited area of land acquisition, the size of the actual frame culvert is not much, and the left side is a fish pond, which limits the width.

"Well, that's right, if it's always been a soil layer, this slope can be reached, but once the sand layer is below and the water level is relatively high, there is no way to slope." Zhang Xiaoyun said.

The water level is not high, and the use of water collection wells is not a problem in grading the soil according to this ratio.

Even if the water level is so-called high, the soil layer can also use the water collection well. But once in the sand layer, the water level is low, it is easier to do, I am afraid that it is the sand layer and the high water level, and it will be very troublesome to slope according to this slope.

Once the sand layer is impacted by the water flow, it is easy to cause a collapse accident.

The foundation pit of more than five meters, once a collapse accident occurs, it is difficult to have an accident.

Once something happens, it's okay if no one dies, but no one can afford to take this responsibility if they die.

"Team Zhang, why don't you dig it first, see if there is water below, if there is no sand layer and it is dense, the problem is not big, if there is water, it is really not possible to report to the leadership, see if you want to drill a precipitation well." Shu Cheng thought for a moment.

The precipitation well, compared with the water collection well, is more complicated, the water collection well is only at the bottom of the foundation pit, the low position of the excavation of a small foundation pit, the water is all drained into the water collection well, pay attention to a collection of words, set together.

Precipitation well, pay attention to a drop word!

The dewatering well is around the foundation pit, drilling several wells with a depth of several meters below the original water level, and using a pump to lower the water level in this area collectively.

During construction, both the collection and precipitation wells cannot stop pumping water outward.

However, the cost of the dewatering well is dozens of times that of the water collection well, and the general construction unit will not use this method unless it is absolutely necessary.

In other words, there is no way to depreciate wells.

"That's okay, let's dig it up first, by the way, Minister Shu, do you ask a leader, is this back made of slurry stone back, or steel sheet piles or I-beams?" Since Shu Cheng said to let it go, Zhang Xiaoyun didn't have anything else to say, so he changed the topic again.

In the construction drawings of the flat reconstruction, the back of the design of ninety percent of the design is slurry sheet stone, and there is almost no situation of using I-beams and steel sheet piles in the design.

In the on-site construction, the number of times slurry masonry is used does account for the majority, but I-beams and steel sheet piles are also often used.

Nowadays, the level of Shangyunzhuang is erected, the depth of the foundation pit is more than five meters, and the line put by Shucheng before excavation is only to the position of the distribution beam, and the position that is needed for the back is not excavated together.

Because after the excavation of this place, after the earthwork is excavated, it also needs to be backfilled, which comes and goes, and the cost of closing the machinery will cost a lot.

Moreover, when the construction is leveled and erected, there is also a taboo, that is, the original soil layer behind the beam is allocated to minimize disturbance. These original soil layers, after years of accumulation, have very good compactness and can play a good supporting role.

Since the soil layer behind the distribution beam is not disturbed, there is no position of slurry masonry stone at all, at this time, close the distribution beam and the original soil layer, it is certainly impossible to support the weight of the 25.8-meter frame culvert, and the distribution beam of 2 meters is still not able to support.

Based on these, this is why Zhang Xiaoyun asked Shu Cheng whether to use slurry to build a stone back or other backs.

"Use H-shaped I-beams, it's not practical to build a slurry stone, I have communicated with Mr. Sun, and I have prepared 100 I-beams, which should be enough!" Shucheng Road.

The so-called H-shaped I-beam is an I-shaped or H-shaped steel plate, which is similar to the rail, but there is no rail head and rail bottom thickness.

The I-beam adopts the interlocking type, and its principle is similar to that of the aluminum window at home, and when it slides, it is buckled into the window frame.

To put it bluntly, it is to stagger the front and back of the two I-beams and insert them into each other, which is equivalent to inserting an H word into the bottom of another H word from above.

"How wide are your I-beams?" Zhang Xiaoyun asked.

The width of the I-shaped steel legs, Shu Cheng knew when he heard it, Zhang Xiaoyun said the width of the left and right sides of the H word, and then said: "16 cm, when inserted, I calculate the width of each that can be used by 10 cm, and the distribution beam of 10 meters is a total of 100." ”

All the materials in the project have to be calculated, and there is no basis, and people will laugh at them if they take them out.

"How long do you count it?" Zhang Xiaoyun said, picked up a branch casually, and gestured on the ground.

"Ten meters of distribution beam length!" Shucheng Road.

I saw Zhang Xiaoyun constantly making comparisons on the ground, scribbling formulas, and about a minute later, Zhang Xiaoyun spoke: "100 legs are 16 centimeters wide, and it's enough." ”

"Yes, almost." Shucheng Road.

Shu Cheng rolled his eyes directly, how could he say that he was also a chief engineer in his previous life, and this calculation is still difficult to be direct.

At this moment, the technician of the construction team beckoned to Zhang Xiaoyun and the two by the foundation pit, because the excavator was too loud and could not be heard when talking loudly, so he had to wave to the two.

Zhang Xiaoyun and Shu Cheng stood up and walked down the slope to the bottom of the foundation pit.

Subsequently, Zhang Xiaoyun signaled the master to stop the excavator and loader first when digging.

"Lao Yan, what's wrong?" Zhang Xiaoyun came to Yan Gong, the person in charge of the construction team, and asked.

"Team Zhang, look at it, this place is just a layer of sand, it's only less than half a meter in the afternoon, you can see the water, I predict that the water level is relatively high, at most dig here, you can't dig any further." Yan Gongjian yì said.

Hearing Yan Gong's words, Shu Cheng looked at the foundation pit, and it was really as Yan Gong said, as soon as the sand layer was dug up, mud water appeared, although it was not much, but it indicated that if you continue to dig, it is very likely that a large amount of water will appear.

After all, the water seepage effect of the sand layer is very good, and the speed of flowing to the lower places is also very fast.

"How far is it from the elevation?" Shu Cheng asked.

"Minister Shu, there is still 1.6 meters left. If it is the elevation of the anchor beam, there is still 2 meters. Yan Gong explained.

"Keep digging and see how the water flows when you dig to the elevation." Zhang Xiaoyun instructed: "Only when we see the specific water level can we know the situation at the scene, and we will arrange measures according to the specific situation of the scene." ”

For Zhang Xiaoyun's construction, Shu Cheng agrees very much, and only by understanding the specific situation can the construction site prescribe the right medicine.