【作者】 冀世杰；

【导师】 赵抚民；

【作者基本信息】 南昌大学 ， 岩土工程， 2012， 硕士

【摘要】 基坑降水作为基坑施工的重要工作之一,可以起到降低地下水位,防止坑底隆起,保证基坑的正常施工等作用。一个降水设计的好坏很大程度上决定了降水工程的成败。在实际工程中,传统降水设计使用“大井法”比较简单,但设计的合理性却欠佳,因此,对降水设计进行一定的优化研究,使其趋于合理是有必要的。本文对降水的理论及其方法进行了一定的阐述,采用稳定流公式进行降水计算,以基坑总排水量最小为目标建立降水优化的目标函数。使用C#语言编写了一个降水优化程序,程序中用户只需结合实际工程输入一些降水参数,即可得出优化结果,参照优化结果采用改变井点布置、调整滤水管长度等方法对原方案进行调整,然后再次进行优化计算。通过不断的优化计算,使基坑降水方案更为合理。利用midas gts模拟得出的优化方案,对其降水效果进行验证,同时将工程实际水位与优化方案的水位进行对比与分析。更多还原

【Abstract】 Pit Dewatering as one of the important work of the foundation excavation, lower the groundwater levels, prevent the bottom of the pit uplift, and ensure the construct normally. The dewatering design decide the precipitation scheme’s success or failure.In practical engineering, the usual method used in dewatering design is relatively simple, but the reasonableness of the scheme is unsatisfactory,so, optimization of precipitation design is necessary.In this paper, some describes the theory and its method of foundation pit dewatering firstly,using the formula of steady flow to calculate,then establishing objective funetionand that make the foundation Pit’s total water inflow is minimum.using C#language to write A precipitation optimization program. Users can get optimized precipitation design based on after input the parameter.reference optimized precipitation design to adjust the well point and the length of the filter pipe, then use the program to optimize the calculation once more。 with the constantly optimization calculations, the Precipitation design will more reasonable。Use midas gts to simulate the optimized precipitation design, verify its precipitation effects,compare the difference between original precipitation design and optimized precipitation design。更多还原