Abstract During tunnel construction at high altitudes, construction crews often encounter an oxygen deficit and
their labor intensity is different than when they are working in normal-altitude (plain area) tunnels. In this paper, using the Queershan tunnel as an engineering case, the labor intensity classification standard for tunnel construction procedures in a plain area is obtained according to the national physical labor intensity classification standards and actual research results. Based on the principle of alveolar ventilation, the correction coefficient of the average metabolic rate changing with altitude is obtained. Considering the correction coefficient of the average energy metabolic rate changing with altitude for physical labor, the labor intensity indexes and classifications of critical tunnel construction procedures under different altitudes and the labor intensity classification of critical construction procedures in the Queershan tunnel are calculated. By comparative analysis, it is found that the labor intensity classifica?
tion of critical construction procedures in the Queershan tunnel is generally one level higher than the labor intensity of tunnel construction in plain areas (normal altitudes).
Abstract：
During tunnel construction at high altitudes, construction crews often encounter an oxygen deficit and
their labor intensity is different than when they are working in normal-altitude (plain area) tunnels. In this paper, using the Queershan tunnel as an engineering case, the labor intensity classification standard for tunnel construction procedures in a plain area is obtained according to the national physical labor intensity classification standards and actual research results. Based on the principle of alveolar ventilation, the correction coefficient of the average metabolic rate changing with altitude is obtained. Considering the correction coefficient of the average energy metabolic rate changing with altitude for physical labor, the labor intensity indexes and classifications of critical tunnel construction procedures under different altitudes and the labor intensity classification of critical construction procedures in the Queershan tunnel are calculated. By comparative analysis, it is found that the labor intensity classifica?
tion of critical construction procedures in the Queershan tunnel is generally one level higher than the labor intensity of tunnel construction in plain areas (normal altitudes).
WU Qiu-Jun- 1,
2 Yu- Li- 1,
2 Xie-Wen-Qiang- 3 Li- Qi- 1 etc
.Study on the Labor Intensity Classification Standard for Critical Construction Procedures of High-Altitude Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(6): 44-48
2016, Vol. 53 