Three days later, pier 5 was poured on pile foundations 3 and 4.

Early the next morning, the excavator came to the construction site.

The position of the No. 1 and No. 2 pile foundations of the No. 5 cushion cap has long been determined, and the rest of the work will be handed over to the construction workers.

Shu Cheng only needs to look at the deviation between the center of the pile and the center of the drill bit, and talk to the supervisor Lu Feng.

These days, the supervisor Lu Feng has only been on the construction site for three days, and he did not keep an eye on the site according to the requirements of the existing line, mainly because Zhao Qingming did some work, and Lu Feng went to the construction site when he poured concrete three times. Although Lu Feng came to the construction site, he did not measure the depth of the hole and the specific gravity of the mud.

Whether he comes or not doesn't matter much at all. Ordinary supervisors have to ask a lot of questions when they come to the scene, the reason why Lu Feng didn't mention it, he didn't even ask, all the numbers were provided by Shu Cheng, and it may be that the meal that Zhao Qingming invited him to eat that night played a big role.

Sometimes, as long as money can solve the problem, it is really not a problem.

After the No. 1 and No. 2 pile foundations of the No. 5 cushion cap were positioned, Shu Cheng guided the excavator and began to test the No. 6 cushion cap together with Zhang Xiaoyun.

Zhao Qingming is also very happy about the excavation of the No. 6 bearing platform, after all, the construction site can work more, and he can earn more money.

With the work of the excavator, in less than ten minutes, the foundation pit was dug to the design elevation, and the ground was all sand layer, and the water flow appeared only ten centimeters away from the design elevation.

"Team Zhang, with such water, it shouldn't be a problem to dry the bearing platform, right?" Shu Cheng looked at the water in the foundation pit, it was just a trickle, not sprayed out like Baotu Spring, Shu Cheng's heart was very clear, this bearing platform was absolutely capable, but Zhang Xiaoyun was the captain of the operation team after all, although he rarely took care of things, sometimes, he had to ask him what he meant.

Zhang Xiaoyun is tall and thin, his face is extremely long, he happened to be dead this year, he looked at the foundation pit and stared for a while, nodded and said: "It shouldn't be a problem, but it won't work when the time comes, dig a ditch around the bearing platform, and then dig two collecting wells, and pump water out." ”

Zhang Xiaoyun has been on the scene for many years, and he can be said to have a good grasp of this method, and what he said is exactly what Shu Cheng considered.

"This is okay, the elevation of the bottom of our cushion cap, there is no fixed elevation, just a relative elevation, as long as we raise the bottom of the cushion cap up ten centimeters, this water will naturally not overflow." Shu Cheng responded.

The general project, there is a design elevation, the Jersey line, but it is not the same, because he built it in the fifties, the age is too old, plus the time of the design of electrification, and a few years ago, the guide zhì some level points, simply can not be used, the difference is too big.

In order to control the elevation of the cushion cap, the design institute specially placed a text jiàn, the bottom elevation of the cushion cap, from the lowest point around the very pier body, down two meters, is the bottom of the cushion cap.

The so-called lowest point around the pier, once the cushion cap is excavated, this is not Shucheng's final say?

As long as the length of the pile foundation extending into the cushion cap is not too small, it is generally fine.

Zhang Xiaoyun heard Shu Cheng's words, and then said after being stunned: "Then this is really possible, otherwise, we will report to Manager Wei and let him make a decision!" ”

"It's okay, let Manager Wei and Manager Zhang mention it, and see if they can open the bearing platform." Shu Cheng nodded.

After all, the K88 bridge reinforcement site is within the jurisdiction of Wei Jian, and Zhang Xiaoyun and Shucheng only have the right to build it, and they have no right to decide.

Subsequently, Zhang Xiaoyun made a phone call to Wei Jian, and after listening to Zhang Xiaoyun's explanation, Wei Jian said that he would come over in the afternoon to have a look.

Since this is the case, Zhang Xiaoyun and Shu Cheng can only wait.

"Zhao Gong, you ask the migrant workers to bring a protective net to fence this foundation pit, don't fall off people." After listening to Zhang Xiaoyun's words, Shu Cheng said to Zhao Qingming who was standing aside.

Indeed, at a height of more than two meters, if you fall down and cause an accident, you will be in trouble at that time.

At around four o'clock in the afternoon, Wei Jian and Ren Changhong appeared together at the K88 bridge reinforcement site.

Obviously, Wei Jian reported to Ren Changhong, and wanted to bring Lao Ren to the scene to see if he could do it.

"This water is not big, Lao Wei, your bearing platform can start to dry, anyway, there are not many projects opened by the project department recently, so you will have more work." Ren Changhong looked at the water in the foundation pit, more than four hours had passed, and the water level was still not high.

"Well, after excavation, it should not be a problem to be protected with sandbags around it, and then dig drainage ditches around it, and there should be no water pump." Wei Jian nodded.

"That's a good feeling, why don't you dig this first, if the No. 6 cushion platform can be done, the small mileage of the cushion cap here can start to dry." Ren Changhong said.

Indeed, in the direction of small mileage, the No. 6 cushion platform is closest to the river, and if the No. 6 cushion platform can be done, the No. 1 to No. 5 cushion caps, of course, are no longer a problem.

"Xiaoyun, you can dig it out today, try it first." Since Ren Changhong said so, Wei Jian turned to Zhang Xiaoyun and said.

"Dig it out, but this foundation pit should be at least 12 meters * 12 meters, with a depth of 2 meters to three meters, and the amount of sand dug out is a lot, but it can't be piled up around, is it a part of it?" Zhang Xiaoyun asked.

Indeed, a cushion cap is about 300 square meters of sand, which is the amount of compaction, after digging, the expansion coefficient must be at least 1.4, which is equivalent to 420 square meters, around a pit, to put down 420 square meters of sand, and it is very difficult.

After all, this sand is too fluid, unlike soil, which can be built high, and the sand must not be very high.

Once the sand piles up too high and causes a landslide, it's in trouble.

"You just pull it away, but you have to think about the backfilling of the foundation pit after the cap, don't have to pull sand from the outside to backfill at that time, that's not good." Ren Changhong arranged.

Ren Changhong said that it is indeed good, in order to ensure the safety factor, the sand can be pulled out, provided that the rest of the sand you have left, at least after the cap is poured, it is enough to backfill.

"Leader, don't worry about this, if you can pull it away, I will definitely not take it away." Zhang Xiaoyun assured.

"In this case, Xiaoyun, you start digging tomorrow morning, for Lasha, Zhao Qingming is familiar with the surroundings, you go find a few cars, the specific amount Xiaoyun and Xiaoshu you two remember." Wei Jian also arranged.

Hearing Ren Changhong and Wei Jian's words, Shu Cheng nodded, it seems that this platform is about to be opened.

Obviously, with his own efforts, the Chengtai started earlier than in the previous life, and all things, under his own influence, are slowly changing.

The next morning, an excavator and two transport trucks drove into the construction site, and the excavator began to excavate the foundation pit of the No. 6 cushion cap.

According to Zhang Xiaoyun's arrangement, half of the salar of this cushion cap was taken away, and the remaining half was piled up around, and when the cushion cap was poured, it was used for backfilling.

Suddenly, the K88 construction site, pile foundation and cushion cap, construction at the same time.

In one day, the excavation of No. 6 cushion cap was completed, because the elevation of the bottom of the cushion cap was raised by Shucheng by ten centimeters, the water at the bottom of the foundation pit, almost nothing, only some places where the depth was dug, there was some stagnant water.

Originally, Zhang Xiaoyun was worried that there would be too much water and it would affect the cushioning, so it seems that this idea is redundant.

The cushion layer is to lay a layer of concrete under the excavated foundation pit, as a working face, the workers work on the solidified concrete, otherwise, there is mud, sand and water below, and there is no construction at all.

After the excavation of the foundation pit is completed, the four pile foundations around the pile head are exposed, and under the pier body, it is not a bearing cap, but a circular caisson with a diameter of 6 meters.

This is mainly related to the age of this railway is too long, the current railway bridge, the composition of the bridge is generally divided into four parts: pile foundation, bearing cap, suddenly, and stepping stone, and the bridge reinforced by the K88 bridge, because it was established in the 70s, the pile foundation and cushion cap are directly replaced by caissons, and the pier body and stepping stone are still above.

According to the design, a hole should be drilled on the original caisson, and then a steel bar with a diameter of 22 mm and a length of 1.5 m should be implanted, and the burial depth was 45 cm, which served as a connection between the original caisson and the cast-in-place cushion cap.

Of course, the poured new cushion cap, around the caisson, there are also three layers of steel mesh, surrounded by 12mm diameter steel bars made of gluten.

Shucheng is not concerned with other aspects, but planting tendons, if Shucheng is not mistaken, because the original caisson composition is different, the guide zhì planting tendons need to be appropriately changed.

Why is the composition of the original caisson different, this old caisson, the bottom is generally a concrete caisson, and in the upper part of about half a meter, it is a later stone stone, the stone is not firm, to punch holes in the stone, it is extremely difficult.

Therefore, later the design institute made a change, whenever this situation is encountered, the stone is perforated and reinforced, but not according to the design, the distance and depth between the reinforcing bars, the on-site technician decides and controls.

This is very important, once as in the previous life, the planting of the sires on the stone is determined by the technician, there are many things in it, mainly because of how Shucheng operates, runs well, can earn a sum, and will not run, then you still honestly take your fixed salary. xh118