导渗井结合管井技术在互层土中降水效果的数值模拟

The Numerical Simulation on Precipitation Effect of Introduction Well Combined with Pipe Well Technology in Interlayer Soil

以武汉某基坑降水工程为依托,建立导渗井结合管井的数值分析模型,通过改变井管参数,得出:砂层水头降低值越大,导渗井半径越大,涌水速度越快;最优井径比约为13~14。实际工程中可以采用降低砂层水头、增大导渗井半径和采用最优井径比来提高降水效果。

Based on the foundation pit dewatering project in Wuhan,a numerical analysis model of seepage diversion wells combined with pipe wells is established.By changing the parameters of pipe wells,it is concluded that the bigger the reduction value of water head in sand layer,the bigger the radius of seepage diversion wells,and the faster the water inflow speed;and the optimal diameter ratio is about 13~14.In practical engineering,the effect of precipitation can be improved by reducing the head of sand layer,increasing the radius of seepage diversion wells and adopting the optimum well diameter ratio.