STUDY OF INFLUENCE OF GROUNDWATER SEEPAGE ON REINFORCEMENT EFFECT OF TUNNEL SURROUNDING ROCK IN SATURATED WATER-BEARING SAND LAYER
(1. Faculty of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,Guangdong 510006,
China;2. Guangzhou Metro Corporation,Guangzhou,Guangdong 510030,China)
Abstract:Based on analyses of engineering mechanics,seepage and deformation characteristics of tunnel surrounding rock,a two-medium model for the influence of seepage velocity in saturated water-bearing sand layer on high-pressure jet grouting pile reinforcement effect is presented;and the formula of critical hydraulic gradient of high-pressure jet grouting pile reinforcement failure is given. The reinforcement mechanism of double liquid compound grouting in saturated water-bearing sand layer is put forward. The engineering examples show that chemical grouting is enough to reinforce saturated water-bearing sand layer and can avoid grouting failure,after using chemical grouting to effectively decrease the strata permeability. This grouting system is successfully applied to the reinforcement of tunnel surrounding rock in water-bearing sand layer;and the results have great referential value to the similar projects.
吉小明1,谭 文2. 饱和含水砂层地下水渗流对隧道围岩加固效果的影响研究[J]. 岩石力学与工程学报, 2010, 29(S2): 3655-3662.
JI Xiaoming1,TAN Wen2. STUDY OF INFLUENCE OF GROUNDWATER SEEPAGE ON REINFORCEMENT EFFECT OF TUNNEL SURROUNDING ROCK IN SATURATED WATER-BEARING SAND LAYER. , 2010, 29(S2): 3655-3662.