湿陷性黄土地区明挖车行地道设计分析

Design and Analysis of Driving Tunnel Excavated in Collapsible Loess Area

摘要:

测定湿陷系数的试验压力按规范计算远大于实际压力，规范偏保守。对黄土浸水湿陷这一偶然设计状况，通过偶然组合与基本组合、标准组合进行对比计算分析可知，黄土浸水湿陷工况非受控工况。通过减少水源补给、隔绝水及将水排出地道影响范围，可以有效减少湿陷沉降的发生。

Abstract:

The test pressure for determining the coefficient of collapsibility is much greater than the actual pressure according to the specification. The norm is partially conservative. For the accidental design condition of loess immersion and collapsibility, the results of comparison, calculation and analysis through the accidental composition, basic combination and standard combination show that the loess immersed and collapsible condition is uncontrolled condition. By reducing the water supply, isolating the water and discharging the water out of the influence area of the tunnel, the occurrence of collapse settlement can be effectively reduced.