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Research on Affects of Water Discharge of Nearby Spring by Tunnels Construction in Mountains. Master’s Name ： Yingting Shen Tutor ： Professor Wenqi Ding November 8th 2008. Engineering Example 1 ：.
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Research on Affects of Water Discharge of Nearby Spring by Tunnels Construction in Mountains Master’s Name：Yingting Shen Tutor：Professor Wenqi Ding November 8th 2008
Engineering Example 1： • In the process of Zhongliang Mountain tunnel construction at Xiangyu Railway in China, a large amount of groundwater flooded out of the heading, then 48 of 130 nearby wells in surface were dried up, and well water of the rest ones were reduced a great lot. This seriously disturbed local residents’ normal life.
Engineering Example 2： • Construction of main tunnels in North Apennine Mountains of Italy, to varying degrees, all lowered the groundwater level and dried up nearby wells and springs which are the main sources of local inhabitants’ living water use.
Reasons on Decrease of Water Discharge of Nearby Springs by Tunnels Construction Groundwater Groundwater Lowering Tunnel Gushing Drainage of Springs and Wells Drainage Expansion of Cone of Depression Tunnels Construction Loss of Groundwater Resources
Tunnel Exit Tunnel Entrance Xiaoxipu Karst Spring Model Origin Natural Elevation：789m Model Elevation：0m Figure1. Numerical Model
Figure 2. Groundwater Distribution after the Rise of Groundwater level
Figure 3. PorePressure Contour of a Profile after Tunnel Excavated
Pore pressure contour of a profile before tunnel excavated Pore pressure contour of tunnel surrounding rocks after the tunnel excavated Pore pressure contour of a profile after tunnel excavated