摘要
隧道施工地下水问题困扰着隧道工程界多年，关于地下水压力对支护结构的影响认识不一致，为此需要从地下水作用机制研究出发，开展隧道衬砌水压力模型试验研究。模型隧道净空设计参考国内300--350km／h高速铁路单线标准，模型试验的设计包括围岩模拟、试验流体、参数选择、试验工况、试验仪器选择等，试验工况包括：不同水头高度（1，2和4m）和不同支护及排水条件（无支护全排和二衬不排水）等。通过在实际岩体中的小比例洞室模拟试验研究，对隧道开挖和支护引起的地下水渗流变化过程、地下水排放方式与水荷载之间的相关关系等取得较明确的定性认识，并以模型试验为基础开展数值模拟分析，为隧道水压力定量研究奠定试验基础。
A consensus about the understanding of groundwater effecting on tunnels is not reached yet up to now, and the impact of groundwater pressure on supporting structure was not fully understood. Based on this, model tests are carried out to understand the effects of water pressure on tunnel. In a 300 - 350 km/h high-speed railway project, the design of model test included simulated rock, test fluid, material parameters, test conditions, test equipment. In this test, various working conditions were considered, such as 1 m, 2 m and 4 m water heads without supporting and with free drainage, lined with undrained condition. With the testing results, a relatively clear understanding was obtained, i.e. the changing process of groundwater seepage caused by tunnel excavation and shoring, the correlation between water load and groundwater discharge methods. Furthermore, numerical simulations were performed based on the model test results.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2013年第9期1785-1790,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
铁道部重大科研课题(2009G005–D)
关键词
隧道工程
水压力
模型试验
tunnel engineering
water pressure
model test
