摘要
研究目的:以工程类比和数值分析为基础,提出确定水下隧道最小岩石覆盖厚度的方法,供同类工程参考。研究结论:(1)挪威经验曲线方法最简便,适合工期紧迫时地质勘察前期的初步判断,但结果偏于保守,还需后续阶段进行更详细的经济论证;(2)隔水岩柱经验公式能较准确地确定水下隧道最小顶板厚度,在地质详勘探明地质条件之后,可作为一定的参考依据;(3)数值分析所得到的结果最为精确,但要求苛刻。数值分析需要在工况场地条件、工程地质条件和水文地质条件等外在条件完全确定的条件下,才能建立较好的还原施工现状的模型。故可作为最后的判据参考。
Research purposes： Based on the engineering analogy and numerical analysis,the method is offered for determining the minimum security coping thickness of sub-aqueous tunnel for offering the reference to the similar works.Research conclusions：（1） The Norwegian Experience Curve Method is the simplest and the most easy and it is suitable for the primary determination at the early stage of geological survey while the construction period is pressed,but its result is conservative and needs to be economically verified at later stage.（2） The Water-resisting Rock Column Experience Formula can accurately determine the minimum security coping thickness and its result can be as the reference after the geological condition is well known.（3） The result obtained with numerical analysis is the most accurate,but the numerical analysis needs lots of certain conditions.Only when the external conditions,such as working condition,engineering geological condition and hydrogeologic condition,are determined can establish the model for returning the original construction condition,so its result can be as the reference to the final determination.
出处
《铁道工程学报》
EI
北大核心
2010年第3期71-75,共5页
Journal of Railway Engineering Society
关键词
水下隧道
顶板厚度
工程类比
数值分析
sub-aqueous tunnel
coping thickness
engineering analogy
numerical simulation
