目标函数法在深基坑降水井群优化中的应用研究

以沈阳地铁一号线一期延伸线四号街站管井降水工程为例,介绍受潜水与承压水作用条件下"小间距、小泵量"深基坑管井降水的设计理念,阐述了目标函数法在基坑降水井群优化中的数学模型应用。以基坑总涌水量最小为目标函数,从前人已建模型所欠缺考虑的模型约束条件入手,完善约束条件,使其成为基坑降水井群优化的数学模型,实施结果满足了基坑降水的施工要求。为降水设计者提供一种更加优化的方法。

Study on Application of Objective Function Method in Optimization of Dewatering Wells for Deep Foundation Pit

Taking the tube well dewatering engineering at Sihaojie Station of the extension line of Shenyang Metro Line 1 (Phase I) as an example, this paper introduced the design concept of tube well dewatering for deep foundation pit of “small spacing and small pump volume” under the action of phreatic water and confined groundwater, and described the application of objective function method in mathematical model in optimization of dewatering wells herein. It generated the objective function of minimum total water yield of the foundation pit, and then starting with the constraint condition of the model established previously, which is not considered yet, improved these constraint and got a mathematical model for the optimization. The result of implementation met the construction requirement of foundation pit dewatering. Therefore, it may provide the designers of dewatering a much improved method.