基于流固耦合作用的海底隧道初期支护安全影响因素分析

发布时间：2018-01-14 11:34

本文关键词：基于流固耦合作用的海底隧道初期支护安全影响因素分析　出处：《铁道标准设计》2015年01期 　论文类型：期刊论文

【摘要】：以青岛海底隧道试验段为工程背景,基于流固耦合理论对海底隧道初期支护安全性的影响因素进行分析,结论表明:(1)注浆加固显著改善了洞周土体强度和整体性,塑性区范围得到有效控制;(2)注浆加固优化了支护结构的受力,随着加固圈厚度的增加,洞周位移出现不同程度的衰减,加固圈厚度对减小水压的贡献依次为:拱顶拱腰拱脚仰拱;(3)随着加固圈渗透系数的增大,洞周水压力随之增大;(4)在流固耦合作用下,仰拱处的土压力远大于其他部位;(5)现行支护参数条件下,海底隧道初期支护结构满足安全性要求,现场实测与数值计算基本相符。
[Abstract]:In the test section of Qingdao subsea tunnel as the engineering background, the fluid solid coupling theory to analyze the influence factors of tunnel initial support safety based on (1) showed that the grouting reinforcement can significantly improve the strength and integrity of the soil around the tunnel, the plastic zone has been effectively controlled; (2) grouting reinforcement are optimized. The force of support structure, with the increase of the thickness of reinforcing ring, the displacement around the tunnel there are different degrees of decay, the thickness of reinforcing ring to reduce the water pressure contribution is as follows: the arch waist and arch foot arch; (3) with the increase of reinforcement permeability coefficient, water pressure around the tunnel increases; (4) in the stream solid coupling, invert soil pressure is far greater than other parts; (5) the existing supporting parameters, initial submarine tunnel supporting structure to meet the safety requirements, field measurement and numerical calculation are consistent.

【作者单位】：河北工程技术高等专科学校建筑工程系;
【基金】：国家杰出青年科学基金项目(51108020)
【分类号】：U455.7;U459.5
【正文快照】： 1概述相对于其他隧道工程,洞周高水压是海底隧道初期支护承担的主要荷载。在施工过程中,一方面,海底隧道围岩初始应力与渗流应力场相互耦合引起应力重分布,同时海水渗流作用弱化了洞周围岩的自承能力,基于流固耦合作用的海底隧道初期支护安全性影响因素进行分析尤为重要[1-4]

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