摘要
以北非典型的泥灰岩病害工程为依托,研究膨胀性软岩的工程表现,寻找获得可靠隧道衬砌设计的软岩条件。通过对工程地层参数选用、原设计力学模型计算、施工中遇到的问题、变更设计、病害处理等方面的研究,得出在常规的围岩压力理论下,应将膨胀性侧向压力、地下水的动态压力、塑性变形和残余应力考虑在设计应力折减之内,采用荷载—结构计算模型计算膨胀性软岩隧道结构受力。研究结论可供治理膨胀性软岩隧道病害及同类工程勘察设计和施工借鉴。
In view of the typical marl disease engineering in North Africa,this paper studies the engineering performance of the expansive soft rock,and looks for the reliable soft rock conditions for the tunnel lining design.Studies have been conducted on areas of selection on rock formation parameters for engineering,calculation of mechanical model for original design,problems in construction,design alteration,disease treatment,and etc.,and then the conclusion is summarized as that,based on the conventional surrounding rock pressure theory,all the expansive lateral pressure,the dynamic pressure of groundwater,plastic deformation and residual stress should be considered within the stress reduction.The stress suffered by tunnel structure in expansive soft rock should be calculated by using the load-structure calculation model.The research conclusions can be references for treatment projects of tunnel diseases in expansive soft rock and other similar survey,design and construction works.
作者
王建鹏
Wang Jianpeng(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi′an 710043,China)
出处
《土木建筑工程信息技术》
2020年第2期140-146,共7页
Journal of Information Technology in Civil Engineering and Architecture
关键词
膨胀性软岩隧道
结构受力计算
应力折减
Tunnel in Expansive Soft Rock
Structural Mechanics Calculation
Stress Reduction
