TO CALCULATION OF THE COEFFICIENTS OF AUTOMATIC REGULATOR OF TUNNEL FAN CAPACITY

Analysis of the existing methods for calculating the coefficients of the proportional-integral regulator of the automatic control system for the capacity of the axial fan of the shallow subway was carried out. The technique of calculating the controller coefficients in the Mathlab (Simulink) environment is presented.

METHOD OF RAILWAY TRAINS VIBRATION CHARACTERISTIC DETERMINATION BASED ON FIELD MEASUREMENTS

The rail transport (railway lines, shallow subway lines or passing on the surface) is a source of increased vibration.As a result, predicting the parameters of vibration and the structure-borne noise generated by it when designing residential and public buildings near lines or designing new transport lines is an important task. For operating lines, the initial data for the forecast are the results of measurements of vibration parameters at the location of the projected building. For projected lines, the parameters characterizing the source of vibration - the vibration characteristics of moving trains - should be used as the initial data for the forecast. The method for railway trains vibration characteristics determination is described which based on field measurements. As an example of the method application determination of vibration characteristicsof suburban electric trains running along the line of the Savelovsky direction of the Moscow railway is sited. Linear regressions equations are given that connect the weighted vibration velocities in the horizontal direction of vibration propagation perpendicular to the railway line with the train speed

Smooth Blasting Construction Technology of Urban Shallow Subway Tunnel

The article combined the existing theory of smooth blasting and the in situ construction experience. From the viewpoint of smooth blasting in the practical engineering application, a research was initiated on how to put smooth blasting construction technology of urban shallow subway tunnel into use, based on the example of the construction of the small mileage segment of the left tunnel line of 2# shaft of Hai-pi tunnel interval of Qingdao Metro Line 2, which provides the reference for other section construction of Qingdao subway.