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On the Causes of and Treatments against Karst Neogene Marlite
Pages: 136-137
Year: Issue:  11
Journal: Yellow River

Keyword:  karstneogene systemmarlitereplacementdiaphragm wallSouth-to-North Water Transfer Project;
Abstract: Karst highly develops in mari stratum on the project site of the Qihe River siphon of the South-to-North Water Diversion Project. By using investigation and statistics methods,combining with the geophysical,drilling and other means of methods,it surveyed the karst and bedrock devel-opment of inverted siphon and tested and analyzed by using the site rock,filling,groundwater and river water. The results show that karst is a spe-cial geological condition combination form,shape of karst dominated by corrosion pits,seam the development,classification and development de-gree of medium strength. Karst has greater influence on inverted siphon foundation stability,needs to take measures,combined with engineering characteristics,considering the engineering safety,investment,construction period,site condition,the treatment effect and other factors,after a plan selection,with soil replacement and diaphragm wall for foundation treatment.
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