The cableway station did not go to Blue Sky Heavy Industries, but first turned to several construction companies for help.
The construction companies in the Phoenix Kingdom are very simple. Because land management is too strict, they are only responsible for projects and do not touch any land acquisition or sales.
Without too much business interference, it also allows them to be more professional in their own work... Of course, this major can only be compared with other regions. The actual demand for disaster prevention has led to relatively conservative construction in the country, and many types have not had the opportunity to try.
After receiving the request for help from the cableway station, both Fenggu Infrastructure and Summit City (Junction) formed teams to inspect the site.
There were more than two teams inspected, but these were the only ones that came up with feasible plans.
Summit City's business is diverse, including residential complex construction, tunnel construction, steel structure short bridges, etc.
The plan they came up with was a bridge method, which also took advantage of the huge basic weight of the cableway platform itself, using a cable structure and an arch structure on the growing edge to form a protruding bridge.
Preliminary calculations show that steel frame platforms ranging from 800 meters to one kilometer long can be built at both ends.
Fenggu Infrastructure mainly serves the Fenggu Industrial Zone and mostly undertakes factory construction. Because of their business relationships, their understanding of mechanical equipment is better than that of ordinary construction companies.
The plan they came up with was an additional suspension cable plan.
The general concept is to erect a new ropeway above the transport ropeway, and use slings to connect the two ropeways to share the stress on the transport ropeway.
Each of the two options has its own benefits and problems.
The steel-framed half-bridge platform method can indeed solve the current problem, but no one knows to what extent the rock formations will grow outward, and the construction period is relatively long. After completion, there may still be more than three kilometers in between.
The solution to share the force of the suspension cables has low construction cost and short expected project time. However, the two cableways need to be connected by slings, which will block the movement trajectory of the existing cableway crawling mechanism. A new pulley device that can bypass the lifting point is required. .
Circumventing the lifting point may sound easy, but the weight limit of the container plus cargo is 22 tons, plus the pulley block and single-cylinder engine transmission group. If it is not circled well, it will be over.
In the end, we did not choose the solution of a construction company, and directly approached Fenggu Machinery Factory, a provider of ropeway crawling equipment, to solve the problem.
The solution came from the cableway platform itself, and it was a simple move - add parallel steel cables!
The difference between Hefeng Valley Infrastructure's plan is that the new steel cable is closer to the original steel cable. There is no need to suspend between the two sets of steel cables. Wouldn't it be enough to just hang the two steel cables with one crawler?
It cannot be said that Fenggu Infrastructure is too stupid, but it has nothing to do with them. All the installation of bracket structures belongs to the after-sales department of the machinery factory, and there is no geotechnical work in the entire project.
After the ropeway station staff met with the machinery factory, they went to the steel factory for help with mechanical analysis.
It was finally decided to switch to the loading method of four cableways with thin cables.
This is mainly to prepare for situations where the distance exceeds 5 kilometers.
The steel cable currently used has a diameter of 37 mm and a specification of 7×7×5. The dead weight of 5 kilometers is close to 37 tons. Over five kilometers, the two steel cables add up to more than 80 tons at any time. The distance between the two steel cables is smaller than the width of the container. If the support structure is not modified, it will pose a certain threat to the strength of the platform over time.
By switching to 29mm steel cables, the total weight for 5 kilometers is reduced to 25 tons. The four steel cables combined are slightly heavier than two, but the three-in-one loading method can be used.
For example, the No. 1, 2, and 3 cableways are used for modification. Now, No. 1 and No. 3 are used to pull two steel cables respectively, and the steering limit is realized through the pulley at No. 2. In this way, the force of the support structure on the platform will be much smaller, and the direction There have also been changes.
The usage of the four-cableway is the same as that of the two-cableway, using "F" type crawling gear, with two hanging on one side.
Moreover, the steel mill also provides a long-term alternative to the four-steel cable solution, titanium-cobalt alloy 253 steel cable.
Cobalt is associated with nickel ore and pyrite. After the floating islandization began, the business of Rainbow Chemical was not very good, so I thought of supporting Rainbow Metal. In addition, Rainbow Metal's original accumulation can already produce cobalt-containing slag of a certain purity. , finally achieved small-scale production.
Titanium-cobalt alloy 253 is still mainly composed of iron, with the proportion of cobalt being less than 3%. This is mainly due to its ability to provide excellent corrosion resistance at a smaller percentage.
253 is a new material developed for new turboprops commissioned by Blue Sky Heavy Industry. However, materials science is relatively high based on the existing academic strength, experience and exhaustive content. 253 was a bit soft after it was made, and more than a dozen were replaced. The heat treatment methods did not meet the requirements.
Titanium-cobalt alloy sounds high-end, but 253 is basically a waste material. It is soft when placed in the engine, but it is enough to be used on aircraft skins. The problem is that 253 is an iron-based alloy, and it is too heavy for skins.
It is suitable for steel cables, but it is too expensive because of the titanium and cobalt content. The titanium content is not high enough, and it is only 12% lighter than conventional steel cables.
After being asked by the ropeway station, the steel mill thought that it seemed to be quite suitable for them.
At a length of several kilometers, a 12% weight reduction is of great significance. For example, if it is to be stretched to eight kilometers in the future, the four 253 alloy steel cables will be 19 tons lighter together, which can almost empty a container. load.
But obviously, it is too expensive, because 253 is not in mass production. If the ropeway station needs to be customized, it will involve equipment debugging hours, a new hot-rolled winding scheme, testing procedures, etc. In addition, titanium and cobalt are not cheap, so the first batch price At least ten times that of ordinary steel cables.
In short, the cableway station ignored the new materials from the steel plant for the time being, purchased new steel cables, and conducted partial modification experiments.
There are a total of 22 steel cable support points at the Xincheng-Hongshi Cableway Station. Two of them are for passenger transport. As long as the weight of the cargo is limited, they will be ignored in the short term.
The modification of the freight ropeway is not difficult. After all, the designed logistics capacity is 3 kilometers long and 2,400 tons per hour. In fact, due to traffic obstacles in foreign trade, only two to three thousand tons of cargo are transported between the two sections a day, and the entire ropeway system operates sparsely. , there is still half a day completely idle.
Even if the length exceeds three kilometers, it only needs to limit the container load ratio in a short period of time.
The main reason for the urgent modification of the cableway station is to facilitate the transportation of large items, especially items that cannot be transported by airplanes, such as steam turbines and train assembly modules.
Several ropeways were stopped and it took more than ten days to modify and test the supports.
The main frame, that is, the original steel cable on the No. 2 frame, was retained and used to pull the new steel cable across the chasm. There is no way for a little mage to send tens of tons of steel cables across the shore.
All four steel cables were in place, and several rounds of load tests were conducted using counterweights. The ropeway station's own aerial operators checked the condition of the steel cables before recovering the original steel cables of No. 2 frame.
The new crawler, which has been waiting for several days in the freight yard, is installed, and then the 50-ton transport is tested using containers and counterweights, and then 70-ton, 90-ton, and 110-ton transport.
I’m not crazy, because as time and distance increase, the cableway’s load capacity will become smaller and smaller due to increased stress, the weight of the cable, etc. If it cannot reach 110 tons for 3 kilometers, how can you believe that it can still be used for more than 5 kilometers? It can load containers of standard weight, and it is difficult to completely avoid the situation of slight overloading of containers.
However, testing above 110 tons is a bit risky.
Fortunately, the plan was feasible and the quality of the steel cables from the steel plant was indeed good. The test ropeway successfully completed the 150-ton counterweight transportation experiment, and it was only then that it was detected that the No. 2 bracket was slightly lifted by less than a millimeter.
Re-strengthen the bracket by grouting and it can be put into use.
This solves the ultimate problem - Fenggu should not build a motorcycle assembly plant.
While the distance is not very far, hurry up and send a few locomotives stored by the motorcycle factory over there!
