In this research, a new method named minimal pumping (MP) method has been proposed. In this proposed method, the required time for damaged pipe repairing is minimized using up stream pipes and manholes capacities, and therefore pumping cost required for diversion is reduced. Generally, wastewater bypass is necessary for repairing the wastewater pipelines using some trenchless repair methods. As a result, upstream of the damaged pipe is plugged with plug and packer and the wastewater is pumped to downstream of damaged pipe. If repair time is long, bypassing would be very expensive and therefore, here, the MP method is proposed in which it significantly reduces the repair cost. In this research, as a case study, the wastewater pipelines of Mirzakouchek Khan Boulevard in Isfahan and wastewater network of Ardekan city are selected to apply the proposed method. Furthermore, in the second case study, the effect of repair time duration and starting time of repair in real condition are also studied using the extended period condition for analyzing. The results show the compatibility of the proposed method in reducing the repair costs of underground wastewater pipelines in urban areas. In other words, the required pumping time and related cost is reduced 70 to 85% and 70 to 100% for Mirzakouchek Khan Boulevard and Ardekan city wastewater network, respectively, using the proposed method.

在这项研究中，提出了一种称为最小抽水（MP）方法的新方法。在该提出的方法中，使用上游管道和人孔的能力，使损坏管道修复所需的时间最小化，因此降低了分流所需的泵送成本。通常，使用一些非开挖式修复方法来修复废水管道时，废水旁路是必要的。结果，损坏的管道的上游被塞子和封隔器堵塞，废水被泵送到损坏的管道的下游。如果维修时间长，旁路将非常昂贵，因此，在此提出了一种MP方法，该方法可显着降低维修成本。在本研究中，作为案例研究，选择伊斯法罕市米尔扎库什凯汗大道的污水管道和阿德坎市的污水网络来应用该方法。此外，在第二个案例研究中，还使用延长期限条件进行分析，研究了在实际情况下修复时间长度和修复开始时间的影响。结果表明，该方法在降低城市地下污水管道维修成本方面具有兼容性。换句话说，使用拟议的方法，Mirzakouchek Khan Boulevard和Ardekan市废水网络所需的抽水时间和相关成本分别减少了70％至85％和70％至100％。利用延长期条件进行分析，研究了实际工况下维修时间和维修开始时间的影响。结果表明，该方法在降低城市地下污水管道维修成本方面具有兼容性。换句话说，使用拟议的方法，Mirzakouchek Khan Boulevard和Ardekan市废水网络所需的抽水时间和相关成本分别减少了70％至85％和70％至100％。利用延长期条件进行分析，研究了实际工况下维修时间和维修开始时间的影响。结果表明，该方法在降低城市地下污水管道维修成本方面具有兼容性。换句话说，使用拟议的方法，Mirzakouchek Khan Boulevard和Ardekan市废水网络所需的抽水时间和相关成本分别减少了70％至85％和70％至100％。