Q:Loess tunnel construction quality control points

3) arch filled with rubble concrete should meet the requirements of the relevant regulations.4) concrete or rubble concrete arch above the back should reach the design strength of concrete arch in the back 70% after construction.

Q:How to put the positioning point is based on what is mainly based on my novice, do not

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),

Q:Ask, general highway tunnel measurement with the total station to measure which aspects? The more detailed the better

Slag road slope line, shotcrete receiver measurement, measurement of highway tunnel excavation section, the most important measure is the monitoring and measurement precision of total station but couldn't finish that much. Ha-ha

Q:How the tunnel template is calculated

According to the experience and the reuse rate of the template, the thickness of the single lane tunnel template is 10mm, the thickness of the single three lane template is 12mm, and the thickness of the one-way tunnel is 15mm. Consider the length of the template and the construction of the impact of general 10m, not more than 12 meters.

Q:How many meters can be poured in the first floor of the 2 level of the surrounding rock of the railway tunnel?

This time you need to see the construction unit of customized templates or make a template for a few meters, such as the 6 template pouring 6 meters, 12 meters is 12 meters, but not more than 12 meters or less than 6 meters, the pouring of inverted arch lining 2, or a concrete filling or the floor, according to your concrete filling or bottom layer below is conducted when a one-time pouring process is only a few meters a few meters. You can take a look at TZ204-2008 "railway tunnel construction technical guide" fifth "construction method" learning

Q:What are the reasons for the two lining concrete lining of the tunnel?

(4) improper concrete mix, segregation, depending on the template part of the lack of slurry or template serious leakage;(5) no watering wood template wet, water bonding or early form removal, Chaimo missing edge off angle, resulting in reinforcement.

Q:I would like to ask the tunnel hydraulic trolley steel template design is the use of what software

According to the design requirements, draw the spare parts drawings, and then workers in accordance with the production drawings!

Q:I would like to ask the high-speed rail tunnel invert small side wall and arch with the small side of the wall of the hanging formwork of what a good method?

The self - made invert sliding formwork trolley is used to fix the side plate directly on the trolley. This is the best way

Q:What is the width of a ring in a tunnel

Generally used in the tunnel as a two car lining template

Q:12 meters of the tunnel car, under normal circumstances, one of the two months to be able to cast a few models?

If the reinforcement in advance or tied to the design of no reinforcement, the normal situation down the car, plus the plug plate, pouring concrete