Experimental Research On The Static Sinking-pile Effect Of Pipe-pile With Hole

With the high-speed development of Chinese economy, the construction ofhighway and railway engineering is promoted by our country vigorously. As verticalreinforced composite foundation, prestressed concrete pipe-pile is applicable in deepsoft soil, but it can have a serious impact on surroundings. In order to explore the newway to reduce negative impact which caused by sinking-pile effect, the technique ofpipe-pile with hole is presented. The problems of static sinking-pile effct, the rules ofpore water pressure, load transmission were researched, but only for the ordinarypipe-pile. The technique of pipe-pile with hole has not been applied in engineering, nota lot of international and domestic reseachs on the technique of pipe-pile with hole werereported, the above aspects are almost blank for pipe-pile with hole, it is necessary toexplore and research the static sinking-pile effect of pipe-pile with hole.To the problem of static sinking-pile effect, this article studies the the rules ofpore water pressure which caused by the static sinking-pile effect of pipe-pile with holeby experimental and numerical analysis, and the ultimate bearing capacity of pipe-pilewith hole is studied, the main works in the thesis are as follows:(1) Based on static sinking-pile model tests, the rules of pore water pressure whichcaused by the static sinking-pile effect of pipe-pile with hole are researched. Therelationship between pore water pressure and depth is analyzed. The peak value andpore water pressure dissipation of ordinary pipe-pile and pipe-pile with hole arecompared. The ability of reducing peak pore water pressure and accelerating pore waterpressure dissipation of three kinds of pipe-pile with hole are compared.(2) Based on ultimate bearing capacity model tests, the rules of relationshipbetween bearing capacity and time are analyzed. The bearing capacity reduction of threekinds of pipe-pile with hole is researched.(3) Based on the software which named FLAC3D, the rules of pore water pressurewhich caused by the static sinking-pile effect are researched, and the results arecomparatively analyzed with the experiment.