Research on pre-treatment technology for rectangular pipe jacking obstacles in metro complex environments
In response to the problem of forced shutdown caused by obstacles encountered during the process of rectangular pipe jacking in complex environments,horizontal drilling combined with a geophysical exploration method was used to explore obstacles at the entrance and exit of a planned metro station in Xiamen,and the pre-treatment technology for obstacles in complex environments was studied.The risks and advantages and disadvantages of various handling methods for different obstacles were analyzed.The results show that the proposed scheme of dense drilling to remove isolated rocks and excavation of pile foundations and top pipe pushing in underground tunnels has completely and effectively cleared obstacles in advance,while at the same time shortened the construction period and reduced engineering costs;in addition,based on the research and analysis of the jacking parameters,some suggestions have been proposed for obstacle detection and preprocessing in the metro jacking channel,the selection of jacking parameters and the improvement of jacking.The relevant research results could provide a certain basis and reference for pipe jacking construction under similar working conditions.
metrorectangular pipe jackingobstacle detectionrisk control
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