With the implementation of one project after another, the first phase of the new city bidding has also come to an end, and the contractors have signed the prepared agreement, and everyone can't help but breathe a sigh of relief.

Zhao Sheng was generous at this time, and specially invited the businessmen to stay for dinner and chat to congratulate him.

According to the agreement, all projects will start construction by August 1 at the latest. On July 8, the contractors filled the construction department again, and they came to seek technical guidance. At this time, Wang Xuan was also there, and the design of various buildings was based on his requirements, although the sand table was clearly marked, but the actual construction still needed on-site surveying and mapping.

Officials from the Ministry of Construction explained the purpose and significance of the design of each project to the merchants, and gradually entered the substantive demonstration stage.

For example, why does the city wall require a foundation depth of six feet, but why the lower part is made of stone, and the upper part is made of brick and cement concrete.

The reason for this design is that the auspicious rain is more soft and soft, which puts forward higher requirements for the construction of the foundation. And the depth of six feet can reach the underground stone layer, and the city wall will be stable and not deformed when it is built on the stone layer. Stone is used because of the low cost, and bricks are used in the upper part to reduce the difficulty of construction, and it is easier to move bricks than stones.

Needless to say, the cement makes the stones and bricks of the wall stick more firmly to each other, which is why the thickness of the above-ground part of the city wall is only three feet.

Officials from the Ministry of Construction were explaining these questions to the contractor all morning, and everyone visited the sand table of the new city to exchange information on the cooperation between the projects.

At this time, the importance of unified command and deployment is revealed, and those who build roads cannot choose one at random to start repairing, and those who build city walls cannot choose a section at random to start building.

The Government Affairs Yuan, Phoenix School, and Jixiang First Hospital are all in the 12th district, so Phoenix Avenue and Jixiang North Avenue should be built first, followed by Xianglin Avenue.

The same is true for sewer construction, which needs to be cut off when crossing the river, and the construction of bridge piers and embankments will follow.

The first part of the city wall was built in the old city, where transportation, work and the daily life of workers are close to the old city, and the traffic is also very convenient.

The tools will be partially lent to each family by the Government Council, and will be returned after the completion of the project, and the damage will be compensated according to the price.

The meals are solved by each family, and it is necessary to provide advance reporting for lunch and dinner, and the food cost will be deducted from the project payment.

The accommodation of the workers during the construction period is solved by the Government Affairs Yuan, and they live in simple board houses, but they have extremely high requirements for hygiene, and the most basic one is that they are not allowed to defecate in the open.

Temporary public toilets were the first to be built near workers' residences, and the inspectors of the Ministry of Health inspected them from time to time, and if they found any violations, they would punish the contractor, and the project cost would be deducted depending on the severity of the situation.

After these problems are solved, the problems of materials and construction technology are highlighted.

Cement factories and brick factories are already working for more than seven hours a day, and even if the number of workers has increased by 30%, it still cannot meet the market demand, so that contractors are eager to participate in production themselves.

There are many people who see business opportunities during this period, cement and bricks and tiles need technology, but quarrying is relatively simple, when the demand for stone in the first phase is public, the people spontaneously built two quarries, one at the foot of the mountain in the west of Hexi Coal Mining Area, and one in the east of Hedong Five Villages.

This factory in Hedong is mainly funded by the four and five villages, and most of the workers are villagers from the two villages, and it is defined as a village collective enterprise when it is registered.

The Government Council gave great preferential treatment to the two collective enterprises, exempted from annual taxes for 54 years, and purchased stone according to the actual output of each company.

Don't underestimate the remaining five months of tax holidays, you must know that the demand for stone is huge, not only for new city walls, but also for road construction and housing, which is currently in short supply, belonging to a typical seller's market. The monthly transaction volume is not less than 2,000 gold coins, and the tax is also about 70 gold coins, and you can save at least 350 gold coins in five months, which is seven times the registered capital.

At present, the main products of the quarry are stones of different sizes, ranging from 20 catties to 200 catties. The by-products are stone and stone powder, which are necessary materials for all kinds of construction, so the products of the stone factory are treasures regardless of the main and vice, and it is estimated that there will be two more if it is not for the shortage of manpower.

In order to put it into operation as soon as possible for the construction of the new city, the Ministry of Construction dispatched some technical personnel from the two quarries established before to provide support, and did not evacuate until it was successfully put into operation.

At present, the output of the cement plant is able to meet the needs of the first phase of the project, and if you take into account the construction of roads, schools and welfare housing, it will be stretched.

There are two brick and tile factories, which also belong to Hedong and Hexi, which can meet the construction needs of the first phase. It's just that the second phase of construction that follows is mainly based on building construction, and the demand for bricks and tiles exceeds that of the first phase by more than 10 times and 100 times, and the consequences are unimaginable if you neglect it.

Cement plants, brick and tile factories, porcelain factories, steel mills and other production capacity are expanding, and coal consumption is also surging, so coal mining plants are also currently expanding.

According to a survey conducted by the Employment Office, the idle labor force in society has basically disappeared, and they either work in factories and construction sites, or earn a living in new industries such as services and transportation. The general restaurants and inns are all made by elderly women and children, and there are female workers everywhere, and even the government affairs yuan has the idea of hitting the farm in the south of the city, but fortunately, the lord suppressed it in time.

This is very good, although the manpower is tighter, but the people can make the best use of it, and the more capable ones can do, after all, it is also to generate income for the family.

The situation of the steel mill is slightly better, in addition to the orders of the hardware factory, they are also producing steel bars of different thicknesses, which are mainly used in the construction of bridges and houses, such as cement slabs, cement pipes, load-bearing beams, load-bearing columns, etc. The cement plant has already placed an order for the steel mill, and once there is output, it will be shipped to Xincheng to meet the needs of the contractor.

At the request of Wang Xuan, the plate factory set up an independent furniture factory to produce some daily furniture to meet the decoration needs of various styles of rooms in the later period. Wang Xuan drew some simple furniture into drawings, including tables, chairs, benches, beds, wardrobes, lockers, etc., most of which were mortise and tenon crafts, showing the skills and wisdom of the mascot.

The next step is the guidance of the specific construction method, Wang Xuan and everyone gathered at the plate manufacturer to discuss the specific implementation plan.

The city wall as a whole is five feet high, scaffolding and tower cranes need to be erected, the inner side of the city wall should be built into a circle of flat-topped brick houses as a part of the fortifications of the city, and the first phase of the city wall can be built to the height of five zhang on the ground.

The construction of toilets is relatively simple, and the construction corps can do a demonstration on site.

The same is true for greening, and the Chengnan Farm has accumulated a lot of experience, and some people will be selected to guide it at that time.

The laying of bridges and pipes in the water is the problem.

The laying of pipelines in the water is bound to stop the river, and the water depth of more than six feet also needs to raise the height of the riverbed, if the pipeline is below the ground level, it is easy to form siltation, and the water dredging operation is more difficult.

It is not easy to fix and connect the pipes in the water, and it is first necessary to lay a solid foundation to prevent the pipes from being washed away by the current.

The foundation should be at the same level as the ground pipes, and the upstream surface should be built with a slope to slow down the high-speed impact of the water flow in the rainy season. There should be a conspicuous sign near the pipeline to indicate the water level and height here, so as to prevent the collision between the laden vessel and the pipeline and cause mutual damage.

The most important thing in the construction of bridges is the construction and installation of piers and bridge decks, if the river surface is narrower, the piers can be built on the bank, if the river surface is wide, the piers will be built in the water. There are two ways to construct bridge piers in water, one is to fill the pier construction area and excavate from the middle, excavate to the rock layer, and then drive into the steel bar and pour cement concrete. The other is to enclose the construction area of the bridge pier to isolate it from the outside, clear the internal river water, and then dig into the rock layer, drive in the steel bar and pour concrete.

Fill excavation construction piers are suitable for use in shallow water areas, and isolated excavation construction piers can be used in shallow water areas and deep water areas.

The shape of the piers is elliptical to reduce the impact of the water flow, and the pier spacing and deck height are adjusted according to the actual requirements and technical level.

The bridge deck is built in sections of reinforced concrete, which is spliced on the piers after condensation, which is considered a modular construction.

The length of the reinforced concrete segmented bridge deck produced with the existing materials of auspiciousness can only be maintained at about six zhang, which makes the spacing of the piers not exceed this length.

The new cement of the cement plant is being tested, if it succeeds, it can create a bridge deck section about three zhang long, and the tensile and compressive tests are being carried out in an intense and orderly manner.

The reinforced concrete deck is very heavy, so it will be built near the selected bridge, and the bridge deck 'mold' will be made with reinforced iron wire, and then concrete will be poured into the middle of the 'mold'. The difficulty is that there can be no bubbles inside the concrete pouring and condensing, which will reduce the strength of the bridge deck, and there is no good way in this era, so you can only use a thin iron rod to keep plugging and pulling out the gas, which is very hard.

The last step is installation, and a tower crane is built on both sides of the bridge at the same time. If the width of the river is beyond the range of the boom, the shore section can only be hoisted first, and then gradually pushed to the middle. At this time, the bridge deck can be transported to the middle in sections by manpower, supplemented by the tower crane carried by the boat in the river to lift it into place.

This has certain requirements for the size of the ship, and the load must at least exceed the weight of the river section, and it is generally several ships operating at the same time.

The contractors were greatly shocked by these new building materials and novel construction methods, and they followed the technicians of the Ministry of Construction for several days to study the details, which was quite dedicated.

Wang Xuan is also assessing how much of these construction methods they can master!