Sewage pipe network construction resource optimization and progress risk analysis method

The invention discloses a sewage pipe network construction resource optimization and progress risk analysis method. The method comprises the following steps: firstly, establishing mathematical modelsof indirect cost, direct cost and total cost; secondly, establishing constraint conditions; calculating the total cost mathematical model to obtain a team number expression; judging the rationality ofa calculation result, and if the result is reasonable, turning to the next step to obtain an optimal team number; finally, evaluating the influence of external risk factors on construction during operation in different months, and obtaining the actually needed construction period. According to the number of teams, the function relation between the construction period and the cost and the numberof the monthly influence days, the number of the utilization days, the utilization coefficient and the monthly average utilization coefficient, the relation curve between the cost proportion and thenumber of teams, the relation