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What is the width of a ring in a tunnel
- The car is generally long 9m can be a one-time pouring, a ring is a pouring two lining lengths
How to set the location of the tunnel trolley,
- The trolley positioning, the first to the two lining trolley running mileage, and positioning, positioning process will have been completed two off the top two tight lining lining, free end positioning first center point positioning control of elevation and with a plumb line (top surface elevation is equal to the length of the plumb line + if the mileage of two the center point of elevation can be lining),s
In the tunnel construction, the water stop strip and the water stop strip are used in what place
- If you need to connect in the field, you can use the electric heating plate vulcanization bonding or cold bonding (rubber water stop) or welding (plastic water stop) method, such as user connection is difficult, I can send technical personnel on-site guidance.s
Tunnel lighting design steps, 2 teachers said to design a template
- When the light into the human eye increases, the pupil contraction, when the surrounding environment becomes dark; into the human eye when the light is reduced, the pupil increases.s
How to put the concrete on the tunnel
- Two lining trolley consists of two parts, one is the erection and welding of steel trolley, and the other is pouring trolley.s
What is the simple calculation method of the tunnel excavation unit price
- Parameter valuationThe valuation of parameter method is the method of calculating the multiplication coefficient according to a certain cardinal number or the custom formula. This method is simple and clear, but the biggest difficulty is the scientific formula, accuracy is difficult to grasp. This method is mainly applicable to the construction process must occur, but it is difficult to predict the specific items in the bidding, but can not separate the project content of the project measures. If the valuation night construction fees, two handling fee, rain during construction can be used in this method.s
What grade of concrete used for tunnel cushion
- Course (bed) refers to the structural layer below the base level. Its main function is to separate water, drainage, antifreeze in order to improve the working conditions of the base and foundation, and its water stability requirements.s
What is the role of the grid steel frame and steel mesh in the power tunnel
- Advanced small pipe grouting small catheter with a diameter of 32-50mm steel pipe, the pipe tip and tube holes for special processing. The first row with drill drilling pipe. Row spacing is 30cm, fan shape, elevation of 5 degrees to about 8 degrees. The length is 2.25m, a single fluid grouting (cement) or double grout (cement water glass slurry). Adjust the grouting pressure according to the soil.s
how to install a door hinge
- In fact, we are not unfamiliar to the hinge.Cabinets, doors and other places usually use this stuff.But how to install a door hinge？ About the hinge,there are three different way...
Basic working principle of automatic door
- How do automatic doors work, the basic composition of the automatic door machine is roughly the same, with more than one, and then with the door signal, you can configure a set of ...
what is basalt rock
- What is basalt rock？Basalt belongs to basic volcanic rocks. It is the main component of the earth and the moon sea ocean crust, the earth crust is an important substance and luna...
Have you done your business with aluminium composite panel suppliers
- Aluminium composite panel are usually used at automobile industry,Optical equipment industry, but also at sports products industry that offer danymic in this field. Have you done y...
what does hinge mean
- What does hinge mean?The hinge is a mechanical deviceused which connect the two solids and allow them to rotate.A hinge may be made of a movable component, or by a collapsible mate...