软土隧道综合施工技术、.pdf

软土隧道综合施工技术、

Integrated Construction Technology in soft soil,

西南某单线铁路隧道所处地形起伏不大, 属高原
剥蚀深丘地貌, 地面植被较差, 隧道进口百余米穿过软
土层, 属浅埋、特软弱围岩隧道。
进口里程DK X +
498, 出口里程DK X+ 800。
沿线不均匀地分布有坡残
积、坡洪积、沟槽型的高山斜坡软土; 下卧基岩为灰岩
夹页岩、炭质页岩, 薄煤层、炭质页岩、页岩呈薄层状,
质软, 易风化, 遇水极易软化, 在地下水的长期作用下,
风化极严重的炭质页岩、页岩多呈软塑状, 物理力学性
质极差, 与软土性质相近。

该隧道进口端自地面至线路路肩附近有淤泥质软
土和富水砂粘土, 局部呈软塑状。
顺线路方向软土分布
122 m , 其中的74 m 在路肩以下分布有2. 5～ 12 m 厚
度不等的富水砂粘土和软土(软土厚6～ 8 m ) , 隧道开
挖时两侧土体挤压内涌, 并沿线路轴向推挤移动。

该地区地下水主要为
第四系空隙水和基岩裂隙
水, 受地表降水影响较大, 每年5～ 10 月份为雨季, 年
平均气温10～ 13℃, 平均降雨量738. 2～ 960. 6 mm ,
日最大降雨量93. 2 mm。

Southwest of a single-track railway tunnel in which the terrain is undulating, is a plateau
Hill landscape of deep erosion, poor vegetation ground, the tunnel through the soft import hundred meters
Soil, is shallow, especially in soft rock tunnel. Miles DK X + import
498, export mileage DK X + 800. There are unevenly distributed along the slope of residual
Product, alluvial slopes, mountain slopes, trench-type soft soil; underlying bedrock is limestone
Folder shale, carbonaceous shale, thin coal, carbonaceous shale, shale was thin layers of
Soft, easily weathered, easily with water softening, in the long-term effects of groundwater under the
Weathering very serious carbonaceous shale, shale Duocheng soft plastic-like, physical and mechanical
Very poor quality, and soft soil of a similar nature.
The tunnel inlet line from the ground to the soft mud near the shoulder
Sandy clay soil and rich water, the local shape of soft plastic. Soft soil along the direction of the distribution line
122 m, 74 m at the shoulder of which the following distribution of 2. 5 ~ 12 m thick
Degrees, ranging from water-rich sand and soft clay soil (soft soil thickness 6 ~ 8 m), the tunnel opened
Squeeze both sides of the soil when digging within the Bay, and pushed along the road axis movement.
The groundwater is mainly Quaternary pore and fissure
Water influenced by surface precipitation, 5 October every year as the rainy season, the annual
The average temperature of 10 ~ 13 ℃, average rainfall 738. 2 ~ 960. 6 mm,
Daily maximum rainfall of 93. 2 mm.