-
Of course, you can use the stones laid on the train tracks to make concrete, because it will not affect it.
-
Of course, this can't, in this case the stone is very easy to break.
-
Can the stones laid on the train tracks beat concrete? Mine is the stone paved with the train tracks, not concrete.
-
Can the stones laid on the train tracks be laid? There should be no problem, yes, it's all technology. High-tech do.
-
Yesterday, you can't just take out the stones laid on the train tracks, it's against the law.
-
This seems impossible to hit, so I won't let it.
-
The stone paved on the train track is a special material of stone, which is relatively hard, in order to prevent the railway from sinking, so such a stone cannot be used as a material for other products.
-
I think the stones used in the rails of the train should be okay, and they should be very hard in this regard.
-
When the train tracks are laid, you can go and lay them, I don't think this stone can be navigated.
-
I'm not sure, well, you'd better talk to the railroad about it.
-
Hello, the stones paved on the train tracks can not be concreted. It's going to break the stone.
-
The stones laid on the train tracks cannot be concreted, because the stones laid on the train tracks are not fixed.
-
Can the stones laid on the train tracks be concreted? Concrete is not allowed on the stones laid on the train tracks.
-
Train tracks are paved with gravel reasons:
1.Distributes pressure and reduces vibration and noise.
A train of hundreds or thousands of tons passed at a speed of more than 100 kilometers, causing a huge impact on the wooden box rails. If there is no ballast, the rails and sleepers are laid directly on the roadbed, which may not be able to bear the weight of the train and will sink downward. The gaps and texture between the gravel of the ballast play a good role in dispersing the huge pressure generated when the train passes, and evenly distributes the pressure to the foundation.
The elasticity of the ballast is used to disperse the vibration force and noise of the train well, making it more comfortable for passengers and protecting the roadbed.
2.Easy to drain and protect the roadbed.
There is a large gap between the gravel of the ballast, and in case of rainy weather, the water can infiltrate down the gap and discharge the roadbed, avoiding the slurry and mud, which protects the roadbed well.
3.Easy to adjust the line.
Due to the aging of the railway and other reasons, the railway is easy to appear horizontal, high or directional deviation, when in a bad state, the railway maintenance workers can lift the line through the starting machine, and then smash the stone into the bottom of the sleeper. Maintain the good condition of the line by adding pads under the sleepers or reducing the height of the ballast, and extend the service life of the rails.
4.Extended service life of the rails.
This type of railway line is best suited for passenger and freight parallel lines, and the weight of the freight cars can also be supported.
5.It is easy to disperse high heat.
If you are careful, you will find that the stones of ballast are all crushed stone, and the main material is premium granite, which is easy to break. When the train passes, the friction between the wheels and the rails will produce a huge amount of heat, so that the high heat generated by the passing of the train can be absorbed due to the fragmentation of the stones; Imagine if you pave a round and smooth stone, the effect of heat absorption is not good.
6.Maintain the gauge to prevent rail expansion and rail breakage.
Due to the huge temperature difference between winter and summer, the thermal expansion and cold contraction of the rail is obvious, so the phenomenon of rail expansion or rail breakage may occur, and even the line crawls, which is the elasticity of the ballast can play a great role in buffering. In addition, the friction of the gravel has a great adsorption force and fit between the line, so that the damage caused by the thermal expansion and contraction of the rail can be avoided.
-
There are several reasons why train tracks should be paved with stones:
The first is to increase the displacement of the track, and when it rains, the accumulation of rainwater may have a damaging effect on the track, but when the water is drained away by the stones, the damage to the track can be reduced.
The second is to provide a certain amount of resistance, which can act as a cushion and shock absorption for the train.
The third is to protect the roadbed.
The fourth is noise reduction and inhibition of plant growth. Laying stones on the rails not only reduces the sound of the steel wheels rubbing against the rails when the train passes, but also effectively inhibits the growth of plants on the tracks.
The role of buffering
Tracks that are stoned on rails are generally called ballasted tracks, while conversely, tracks that do not require stonework are called ballastless tracks. Ballasted tracks are less expensive to build and easier to maintain, but they are easier to deform, require more maintenance, and have a much shorter service life than ballastless tracks.
The main function of the train track stone laying is to evenly transmit the pressure of the upper part of the sleeper to the roadbed, so that the track is stable and the train will not shake violently when passing by. The gravel can fix the sleeper position, prevent the track and sleeper from sinking into the ground when loading, thus acting as a buffer, and when it rains, the presence of gravel helps to drain well and reduce the frost damage of the rail.
-
The term for this stone is "slag".
Ballast is laid on the roadbed of the railway, under the sleeper, and can be divided into two layers according to the position of laying, the upper layer is the top layer of ballast and the lower layer is the bottom layer of ballast . In heavy tracks, the thickness of the two layers should be 30 cm each.
The functions of "ballast slag" mainly include:
One is to bear the pressure transmitted by the sleeper and distribute these pressures evenly across the roadbed.
The second is to fix the position of the sleeper to maintain the correct alignment and slope of the track.
The third is to remove rainwater around and below the sleeper to prevent the soil of the roadbed from being deformed due to wet and soft.
The fourth is to increase the elasticity of the track, so that the rail after being crushed by the train quickly returns to the original correct position.
Fifth, prevent the growth of weeds in the track.
-
If there are no thick enough pebbles under the tracks, the tracks are not stable enough, and the train will move violently when it passes, and the train is very heavy, and if the stones are not paved, the rails will be concave downward, and the train will not be able to run.
Extended Information] 1This is because the rails and sleepers have to bear the weight of the train for a long time, and the role of gravel is to prevent the rails from sinking. In addition, the train passes through the tracks at high speed, which generates noise and high heat, and the other two important tasks of stone crushing are to absorb noise and absorb heat.
2.The stones laid between the tracks are chiseled and have a very irregular shape, so that the stones are easy to break, so that the high heat generated by the passing train can be absorbed by the broken stones.
-
When the train passes through the track, the track will undergo a certain deformation and produce vibration, and the gravel and the track are closely connected, the track and the sleeper are responsible for bearing the weight of the train passing, and the gravel can prevent the track and sleeper from sinking into the ground when the load is loaded, play a buffering role, and can also absorb the vibration and noise generated by the train. Rails paved with small stones are called ballasted tracks, and their advantages are:
1. The load of the rolling stock is distributed on the subgrade surface through the diffusion of rails, sleepers and track beds, which plays the role of protecting the subgrade.
2. It is particularly important to provide resistance to the longitudinal and lateral resistance of the rail row and maintain the correct geometric shape of the track.
3. It has good drainage performance, which is very important to reduce the frost damage of the track and improve the bearing capacity of the roadbed.
4. Provide certain elasticity and damping, and play the role of cushioning and shock absorption.
-
Those stone terms are called slag. Ballast is laid on the roadbed, under the sleeper, to hide the object of the sleeper. According to the position of laying, it can be divided into two layers, the upper layer is the top layer of slag, and the lower layer is the bottom layer of slag. In heavy tracks, the thickness of the two layers should be 30 cm each.
The functions of ballast are as follows:
1.Absorb the pressure transmitted by the sleeper and distribute this pressure evenly across the roadbed.
2.Fix the position of the sleeper to maintain the correct alignment and slope of the track.
3.Drain rainwater around and below the sleeper to prevent the soil of the roadbed from deforming due to wet and soft deformation.
4.Increase the elasticity of the track, so that the rail after being crushed by the train can quickly return to the original correct position.
5.Prevent the growth of weeds on the track.
No, like the maglev train, it is not a train that runs on the tracks. Maglev train is a kind of land contactless rail transportation without wheels, the speed can reach 500 kilometers per hour, its binding energy, is the use of constant or superconducting electromagnets and induced magnetic field between the mutual attraction or repulsion force, so that the train "suspended" behind or below the track, for frictionless operation, so as to overcome the traditional train rail adhesion limitations, mechanical noise and wear and other problems, and has the advantages of starting, stopping fast and climbing ability. But in addition to the maglev train, the other trains are trains that run on the tracks.
Look at the configuration of **, so that half of the stones are full of more than 4 players. >>>More
It is a self-employed business, which requires a business license, and as long as it opens a store, it needs to apply for a business license; >>>More
Yes....Liquor belongs to food....It is not considered a dangerous good.
Hello, you can bring it, but there are requirements. The length of the blade shall not exceed 8cm, and the sharpness of the tip shall not be less than 60 degrees. In order to ensure the safe travel of passengers and maintain the order of riding, the Guiyang Railway Station Police Station has increased the control of the "three products" (including dangerous goods, such as knives; flammable products, such as hair oil glue; Explosives, such as canned gas). >>>More