南水北调济南市区段输水工程地基优化设计

South-to-North Water Diversion Project in Ji'nan Urban Water Optimize Design Foundation

南水北调东线济南市区段输水工程主要采用无压箱涵输水,输水暗涵段建基面以下存在不等厚度的淤泥质黏土。淤泥质黏土承载力偏低,原设计采用水泥土搅拌桩加固的方法。工期紧,又逢冬季施工,原设计方案严重制约了工程施工进度。因此针对输水暗涵的工程性质和淤泥质黏土的性状,提出了工期短、施工方便、投资省的换填方案:两层土工格栅加碎石垫层的地基处理优化方案,并在具有代表性地段进行现场原位浅层平板载荷试验,实验结果60cm碎石加两层土工格栅加固后的地基满足设计要求。

South-to-North Water Transfer East Route Project of Jinan Urban water main box using non-pressure water,water dark Hanjing following paragraph is based noodle existence thickness ranging from silty clay. Low bearing capacity of silty clay, the original design uses cement mixing pile method. Time was tight, winter construction, the original design has seriously hampered the progress of construction. Against the dark water, therefore the nature of the works Hanjing clay and silt of the characters, put forward a short period, construction convenient,investment for the province to fill the program： two layers of geogrid plus gravel cushion foundation Optimize treatment programs and has Lot representativeness shallow spot in situ plate loading test,The results add two tiers of 60 cm gravel geogrid reinforced foundation to meet the design requirements.