Discussion on the techniques of mud-water balanced pipe jacking in water-rich sand layer
The performece of mud-water balanced pipe jacking in water-rich sand layer is affected by sand layer and groundwater,which is prone to surface subsidence,pipe jacking deflection and pipe jacking failure.Taking the pipe jacking construction of Shenzhen Maozhou River main branch pipe network and interconnection project as an example,this paper analyzes and summarizes the key processes such as caisson sinking,pipe jacking in and out of the hole,pipe jacking in and out of the mud water balance pipe jacking in the water-rich sand layer,and proposes the control measures for pipe jacking operayion.The key technical achievements of caisson water sealing,pipe jacking in and out of the hole water sealing,pipe jacking in line control,pipe jacking in drag reduction,ground deformation control,etc.,theus having provided reference for similar works in the future.
Pipe jacking operatinGrouting to reduce dragWater-rich sand layerWater stops
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