Regularity Analysis and Study on Excessive Pore Water Pressure during Jacked Pile of Pre-Ptressed Pipe Piles

According to the control settlement theory,making use of the method of enlarging the piled spacing,PTC(pre-stressed concrete)piles with cap is designed and applied in the deep soft soil ground treatment of expressway.The applicability of PTC piles is discussed.The construction technology and technological requrrements are introduced,the spot observation of pore water pressure conducted during the PTC pile construction,the observation data analyzed.In order to avoid the compaction effect of excessive pore water pressure in the process of the PTC pile construction on the surroundings,some measures are put forward to eliminate the effect of pore water pressure.The advantageous conditions are analized and utilized during the dissipation of excessive pore water pressure,so the aim of secondary consolidation treatment will be materialized.