Analysis Of Ground Surface Settlement Due To The Tunnel Construction With EPB Shield

Tunnel construction technology with shield driven method is being more and more developed and applied in building Metro engineering because of its' unique characteristics and advantages such as intelligence, safety and quickness, etc. Though shield driven method has obtained splendid achievements, it is inevitably caused ground surface settlement. This will affect the normal use and the safe running of the shield tunnel and the ground surface building while the ground surface settlement is too much. This paper refers the case project of the running tunnel from Kecun Station to Datang Station in Guangzhou Metro, researches the ground surface settlement by using EPB shield driven method. In order to obtain the approached curve and the calculated curve, this paper completed the curve approach of the ground surface settlement through the site-monitoring measurement data and calculated with three-dimensional FEM during the period of the construction. Combined with the geological condition, and construction value, etc. this paper analyzed the general discipline due to the construction with shield driven method and the factor that affects the size of the ground surface settlement. Comparing with the approached curve and the calculated curve, the credibility of numerical simulation result and the feasibility of predicting the ground surface settlement through numerical simulation are verified. Dealing with the data showed the approached curve can reflect the common tendency of the data with less error, so it can be used to analyze the ground surface settlement due to the tunnel construction with EPB Shield. At last, some valid construction measurements are given to control the ground surface settlement.