摘要
在富水软弱地层盾构隧道施工中,如何确保始发洞口土体的稳定是保证施工安全顺利进行的重要环节。文章以深圳地铁二号线南-科盾构区间为例,通过对搅拌桩法、旋喷桩法等传统的土体加固工法进行综合对比分析,并结合工程地质情况、地下水、施工环境以及安全性、经济性等因素,提出了选用两道800 mm厚素混凝土墙并配以搅拌桩对盾构隧道始发洞口土体进行联合加固的技术方案。结合现场监测数据,在盾构始发前和始发推进两个阶段对土体加固效果进行检验证明,这是一种适合软弱土层的较好的土体联合加固新技术。
It is crucial to ensure the stability of water-soaked soft stratum at the launching portal of a shield tunnel.Citing shield tunneling on Nanshan Commercial Center to Keji Park section of Shenzhen metro Line 2 as an example,authors made a comprehensive analysis on traditional methods such as mixing piles,rotary-sprayed piles etc.,incorporating geological conditions,groundwater,construction environment,security,economy and other factors,proposed a soil reinforcement technology for water-soaked soft stratum at shield tunnel launching portal by adopting two 800mm thick plain concrete walls together with rotary-sprayed piles.Monitoring results for the effect of soil reinforcement before and after the launching of shield indicated that the proposed option was feasible.
出处
《现代隧道技术》
EI
北大核心
2010年第4期73-79,共7页
Modern Tunnelling Technology
基金
广西自然科学基金重点资助项目(桂科自0832252)
广西重点实验室基金资助项目(桂科能07109005-2)
2010年广西研究生教育创新计划资助项目
关键词
富水软弱地层
盾构隧道
始发洞口
加固技术
Water-soaked soft stratum
Shield tunneling
Launching portal
Reinforcement technology
