This section makes some minor modifications based on the suggestions of book friends. 【Full text reading】．
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"Commissioner Wang, it seems that road construction will not be peaceful." Mei Wan said meaningfully.
"how?"
"I heard that the reconnaissance team that came to Lingao in the morning was attacked at Bairentan." Mei Wan said while circling, avoiding a big stone on the road. The ordinary people are not very clear about the affairs of the Chinese and American trio, thinking that they are also sent out as a reconnaissance team.
"How did you know about this? This matter has not been reported to the internal briefing yet." The situation reported by Guo Yi after returning was still in the confidential stage.
"The corpses have floated to the river beach. Not even a blind person can see it. What's the secret?" Mei Wan said, "With the new environment and new atmosphere, some stupid habits should not be continued."
"What are you afraid of? More than a dozen people surrounded three of them, but they were all beaten back. Three of them were slightly injured, but several of them died." Wang Luobin pretended to be relaxed.
"You can't say that. Even if a few cold arrows are fired, people will be on tenterhooks. We can't wear stab-proof clothing when working on the construction site - it's too hot."
While driving, he reflected on the problems in highway construction: there are too few people who can drive bulldozers, and so many large machines can only operate two or three of them; there are no safety helmets. Although everyone has an 8o steel helmet, it is difficult to wear this to work. too tired. It is recommended to make a batch of willow hats quickly - they found some willow trees by the river; drinking water, now you have to go back to the beach to replenish drinking water every day. The body lost a lot of minerals and needed salt to replenish it. The Planning Commission refused to allocate salt to them directly, saying that only the food office could receive it. After a long time of talking, they finally let go and said that this would only require a certificate from the medical and health team...
"Also, there are only a few formal staff in our construction engineering team now, and they are all technicians. The construction workers are all novices transferred from the basic labor team. It doesn't matter if they don't have skills, we can teach them - migrant workers are not Are they equally capable? But the problem is that they give us a new group of people the next day - even the workload is just in the name of Japan. Come on, this is not just eating from a big pot. How can we practice egalitarianism like this? Well, the previous group hasn't learned it yet. , here comes a new batch, isn’t this just a waste of time? Look at the construction site today where more than 300 people came at once, how much work was done?”
"That's right." Wang Luobin thought thoughtfully. Most of the labor teams sent to the road construction site today were indeed unemployed.
"A special engineering team must be formed to carry out infrastructure construction, and the personnel must be fixed." Mei Wan said, "My requirements are not high. If we have 50 people, we can send basic labor to do the hard work."
The two people talked about the highway all the way and came to the temporary highway construction headquarters. In order to organize the construction nearby, this place was almost 2 kilometers away from the camp. The conditions were very simple and there was no electricity. It's just a tent.
Walking inside, the tent was still hot and dry after being exposed to the sun all day, and various drawing boards and surveying equipment were crammed everywhere. Rolls of survey drawings were piled on a large table. Mei Wan came up with a plan.
The route is chosen on the east bank of Wenlan River. The east bank of the river has more room for development than the west bank. In the future, it can be connected with Hongpai, Majiao and other ports to form an industrial base-port transportation integration. Several major modern industrial development zones in Lingao are also located on the west bank of the Wenlan River.
For travelers who came to the 17th century, a perfect road system was the basis for rebuilding modern society. The road to modernization not only facilitates the circulation of materials and people, but also greatly increases the regime's control over society. Although China is one of the first countries to establish a national road transportation network, the scope and depth of road extension are still insufficient. Taking Hainan as an example, there was only one official round-island post road in the Ming Dynasty, and there were no relatively complete roads in each county. There are only paths made by cattle treading by some people. Regardless of official roads or ordinary roads, there are almost no road hardening and drainage facilities. The saying "three feet of soil without rain, and mud all over after rain" also applies to Hainan in the Ming Dynasty.
In comparison, Europe in the same era was not much better. The road condition before 1600 years ago was still very bad. The road construction technology handed down from the ancient Roman era has been lost. The potholes in the road were filled with firewood bundles, and even this weak and perishable material was used as new roads. of roadbed. The idea of modern road construction comes from the Italian Togretta (about 1587). He first mentioned some basic concepts of modern roads in an article, such as the road must be above the level of groundwater; there needs to be drainage on both sides of the road. Facilities; use gravel to build a stronger roadbed, and lay a mixed pavement of gravel and mortar at the door. He also pointed out that this kind of pavement requires long-term maintenance, but is cheaper than the traditional Roman-style hard stone road. Many. Starting from the 17th century, European road construction technology and road administration entered a stage of rapid development.
The road planning of the traverser is naturally ambitious. The planned road has a straight-line distance of 8 kilometers and a total route length of 12-16 kilometers. It is constructed according to the Class B standard of a military road. The throughput of this military road is less than 200 vehicles per day and night. The maximum designed car pass time is 4o kilometers/hour. The width of the entire roadbed is 7 meters, and the width of the roadway is 6 meters, two lanes.
"I have an opinion," Wang Luobin said, "Maybe I'm wrong. Are you investing too much energy in surveying now? Are you planning to build a permanent highway once and for all? Is this necessary now? First of all, Just build a road leading up to it and then slowly improve it. The idea of the executive committee is to build the road to Bairentan as soon as possible. If we continue like this, let alone D+5, the construction will not be completed in a month, right?
Mei Wan looked at the people around her, and everyone was silent. Bingfeng had calculated the general project volume and knew that Wang Luobin was right. But only Mei Wan and Zhuo Tianmin here know a little bit about road and bridge projects. As the leader of the construction team, Mei Wan is very interested in his own plan. Everyone is too embarrassed to raise the issue of the construction period.
Seeing that his plan might be rejected, Mei Wan hurriedly explained: "This kind of road is already a bit luxurious for us, but we should plan ahead and lay the foundation first, so as to lay a good foundation for future expansion and reconstruction." .”
"Now at the beginning of the time travel, we are waiting for things to be done. Although there are no objective and practical standards for what should be simple and what should be precise, as the actual project leaders, you do not have to do everything from a professional perspective to perfection. That is obviously not the case. It's possible that neither technology nor materials are very complete right now. Blindly pursuing perfection is a bit confusing," Wang Luobin said.
Zhuo Tianmin, who had been silent in the construction team, suddenly said: "I agree with Commissioner Wang. Road construction is very complicated. We must consider the slope of the road, the geological structure, the amount of construction, whether a bridge is needed, and whether a tunnel is needed. , Design a construction plan based on the inspection situation... But it can be very simple. Especially now it is just a temporary road. Just determine the starting and ending points of the road, the places that must be reached on the way, and then choose a route according to the passing terrain to build a simple A dirt road will do. According to on-site surveys, the local terrain is not complicated, and there will be no major problems in building access roads in places like this without even requiring rigorous surveying and mapping."
Zhuo Tianmin's words made Mei Wan's face look ugly. Although this man, who graduated with a bachelor's degree in mechatronics and is a registered consultant and construction engineer, had been in the group because he signed up late and had to take care of his son, he had been in the group. He maintains a low profile, but his professional abilities are obvious to all. This has always made Mei Wan a little taboo.
He originally wanted to show off his skills to the Executive Committee through this project, and at the same time establish a reputation among the masses - winning the favor of the people by building high-quality public buildings is an easy way to succeed.
But now, his idea was obviously not favored by Wang Luobin, and Zhuo Tianmin refuted it on the spot, giving him the evaluation of "not having a sense of the overall situation."
"There are hundreds of people on the beach now, as well as so many supplies and machinery. These things must get to Bairentan as soon as possible! Our mission now is to get there, not how. Don't put the cart before the horse." He stood up and said, "You I will give you an answer to all the requests I made tonight, but the plan needs to be redone. By D+6, the team must arrive at Bairentan!"
After the meeting, Mei Wan, who was like an eggplant beaten by frost, reorganized and revised the plan according to Wang Luobin's request. The new road is a simple road with dirt pavement. This kind of road is only suitable when there are few passing vehicles and it can be stopped to traffic on rainy days. Considering that there are not many vehicles passing on this highway, it is also after the Lunar Mid-Autumn Festival, and the rainy season in Lingao has ended, so the rain will not have a big impact on driving.
The next day, the road construction project finally got on track. Adhering to the guiding principle of "exploring, designing, and constructing at the same time," a temporary road construction engineering team replaced the original basic labor team that was noisy and ineffective.
Because they do not have hydrological data on the Wenlan River from the 17th century, they do not know what its highest water level in history was. Therefore, when delineating the route, the standard for distance from the river bank is based on the 100-year flood standard in the 20th century plus a 10% margin.
The roadbed adopts fill type, which is suitable for low and flat areas in plains and hilly areas. In order to reduce transportation links, it was decided to use roadside ditches to collect soil as much as possible, and borrow pits were only used as supplements.
During construction, the width of the highway gutter is first calculated based on the width of the vehicle, and the side line position of the gutter is measured from the roadbed edge to the outside according to the width. Generally, the edge line is marked with lime sprinkling or using a pull rope to draw the gutter. , Mei Wan was reluctant to use lime, so she sprinkled plant ash to fix the edges.
The superficial layer of soil dug out from side ditches is paddy soil or other humus-rich soil. The construction team does not need such soil. It is best to use clay and sandy soil to build the roadbed. These two types of soil are found along the construction site. There is nothing missing and it is very convenient to use. Because it is located along the river, there is a lot of sandy soil, and there are many pebbles and shells mixed in the soil. Direct filling into the roadbed is detrimental to the overall strength of the roadbed. Zhuo Tianmin, who was assigned to be responsible for the earth-extraction work, set up a sand and gravel screen for construction at the earth-extraction site to screen out all the stones and shells in the soil. Pebbles can be used as building materials, as well as shells, and Mei Wan plans to use them to burn lime - but he only knows that shells can be burned, but does not know how to burn them.
The screened soil is used to fill the roadbed. The entire roadbed has a stepped cross-section and is laid in alternating layers of clay and sandy soil. The soil is compacted twice with a road roller every 20 centimeters high. In this way, continue to fill the roadbed to 1 meter. Then the side ditches with soil removed from both sides are leveled to facilitate drainage, and the entire roadbed is roughly completed.
In comparison, the job on the pavement is a bit more complicated. The soil road surface needs to be flat and dense, not loose when the weather is dry, with less dust when driving; and the water can be drained quickly when it rains. These engineering technicians had never worked on road and bridge projects, so Mei drove all night to review all the textbooks and technical materials she had brought with her.
