In the past eight years, even the Royal Design Institute in China did not use computers, let alone CAD and printers. Pen, fun, pavilion www. biquge。 info

In addition, the designers of the design institute are old men, even if they are useless, unlike thirty years later, an old designer, with a large number of young designers, will design a railway, quite fast, of course, the preliminary survey and other information, or some old experts to lead the team to sort out.

Today's drawings are all drawn by hand, and all the data such as numbers, letters, sections, and tables are written in one stroke at a time, which has a severe test of a designer's skills.

In order to familiarize himself with this drawing, Chu Jianghe first looked at the outline and the description of the drawings, and then provided the analysis of the section type of the design drawing, the length of the roadbed and the trench, and then according to his impression of the terrain of Chujiang Town, he deduced step by step, and finally locked a mileage.

This section of the roadbed, the average filling height is about 3.5 meters, the length is two hundred and three meters, and two hundred meters is already very close, although other drawings also have about two hundred meters of subgrade section, but the geographical location before and after can not correspond.

After flipping through the drawings several times, Chu Jianghe finally decided that this mileage section was the section he was currently constructing!

When looking at the amount of work in this mileage, the first thing that catches your eye is the replacement, which is to be replaced with a depth of 50 centimeters, and the material for refilling is gravel.

However, according to the elevation requirements in the drawings, it is not directly from the original ground down to fill 50 centimeters, but to a certain elevation, from this elevation upwards, replace 50 centimeters of gravel.

After all, the height difference of the original ground is relatively large, all dig 50 centimeters from the original ground, to the bottom of the replacement, the height difference and the surface is the same, only the high place to dig more, the low place to dig less, in this way, to each elevation as flat.

Therefore, before construction, it is necessary to measure the existing elevation of these two hundred meters, and the purpose of the measurement is to calculate that a total of many square quantities have been excavated, and this square amount is to ask for money, which is equivalent to earthwork transportation.

Therefore, it is completely unnecessary to level now without leveling.

"Chu Gong, do you have a level on the construction site?" asked Chu Jianghe.

"Yes, yes, Boss Chu, will you use it?" Chu Zhizhao was originally chatting with Zhang Sheng, and when he heard Chu Jianghe's words, he was dumbfounded.

Even Zhang Sheng was dumbfounded, could it be that this guy Chu Jianghe could really understand the drawings?

"It shouldn't be a problem, didn't I make a cement road in the village before, I used it at that time. Chu Jianghe flickered.

As for when the cement road was poured in the village, how could Chu Jianghe spend this money to buy a level, isn't it a waste?

Listening to what Chu Jianghe said is presentable, not like a fake.

"No, Boss Chu, can you actually understand the drawings?" Suddenly, Chu Zhizhao realized something and looked at the Chu River in surprise.

"It's okay, I don't know much about the specifics, but I have basically determined that this distance is the mileage of my current construction, that is, DK040 + 134-DK040 + 337, and the length is about 200 meters. "The Chu River channel.

As soon as this mileage was said by Chu Jianghe, Chu Zhizhao was shocked, because he found that this mileage was something that he wanted to think of in every possible way.

"Yes, yes, that's the mileage!" Chu Zhizhao hurriedly affirmed, this time he finally remembered.

"Chu Gong, look at the design quantity table of this drawing, there is obviously a replacement amount. Chu Jianghe pointed to the drawings.

Chu Zhizhao looked at it, he couldn't understand the other places, but he could still understand the two words of replacement, and on the engineering scale at the back, there was also a list of replacements.

For the construction drawings, Chu Zhizhao under the leadership of the technical director, can barely understand, if he wants to go through the drawings alone, it will be more difficult, because he has been working for three years, first, he does not understand the railway industry, he does not understand the technical industry, and he has not undergone special training in this area.

Until the second year, the master gives you face and lets people look at the drawings, if you don't say a word, then you can look at it yourself, only if you can ask can you really learn something.

Fortunately, Chu Zhizhao is not stupid, after two years of study, he at least understands some technical things, and he can be regarded as a technician, otherwise, he would not be responsible for explaining it today.

"Well, there is a replacement amount. Chu Zhizhao nodded in response.

"Chu Gong, do you have a level at the construction site nearby?" asked Chu Jianghe.

"Yes, right over there in the roadbed. Chu Zhizhao said.

"Will you be super flat, I'll give you a ruler. "The Chu River channel.

"Yes. Chu Zhizhao nodded.

"I'll take you on a bicycle to take it down, let's go down the level first, and record the data of the original ground, so that I will roughly know how much to dig down, and when the time comes, there will be a basis, and you will be able to make a difference." "The Chu River channel.

Hearing Chu Jianghe's words, Chu Zhizhao felt that it made sense, if this thing didn't be super flat first, how could he know how much to dig down?

And if you go back and say that you can do it with your hands, you can also show off, after all, this is a technical job!

"Okay, I'll go with you. Chu Zhizhao nodded.

The two rode bicycles and went, and before going, Chu Jianghe asked Li Changjiang and the others not to continue to work, and to wait until they came back.

The construction not far away is also the roadbed, but the work class is doing its own, and now it is being rolled, and the filling height line on both sides of the other section has been hung, and the level will be used a lot for a while.

"Brother Qi, I'll borrow a level and go over the original ground, and I'm going to start drying the roadbed over there. Chu Zhizhao stepped forward and said to a tanned young man.

"Xiao Chu, will you be super flat? Do you want me to help? The technician surnamed Qi was a little surprised and said kindly.

"No need Brother Qi, I'll do it, you just need to tell me the nearest elevation control point for that section of the roadbed. Chu Zhizhao said.

The so-called elevation control point, to put it bluntly, is a reference point, such as the design institute buried a fixed point with concrete, this fixed point not only has an elevation, but also coordinates, which is used to control the direction of this railway, otherwise, who knows how this railway will go?

Most of the coordinates of these control points are the coordinate system of the whole country, the more common ones are the Beijing 54 coordinate system, the Xi'an 80 coordinate system, and later the WGS84 coordinate system.

With the elevation of this control point, it is possible to calculate how deep the original ground will be dug through the measurement of the level.

I deleted Jiang Fan's paragraph earlier, so the chapter is missing three chapters.