Research Into Bearing Behavior Of Rock-socketed Piles With Thick Sediments

The rock-socketed pile is gradually promoting into various high-rise buildings,briges and port projects since its first use in moutains and hilly areas for thecharacteristic of high capacity of bearing and little settlement. Presently, scholars havetaken many achivements. However, the work about bearing behavior of therock-socketed piles with thick sediments is seldom reported till now. Based on field testand methmatical simulaion, this article analysized the bearing capacity and failuremachanism mainly, The work has been accomplished with the following achivements:Bearing capacity of rock-socketed piles dramatically reduces influenced by thethick sediments located at the bottom of the pile. It goes into destabilizationcorresponding with suddenly brittle destruction. Higher strength of the side rock andlonger socket may improve the bearing capacity obviously. And the iflter cake isobviously harmfull to the bearing capacity. The shatf resistance destribution present as asaddle-shaped form. Provided the weak embedded rock or the short socket depth, thelocal peak value of side resistance at the lower segment of the socket period of the pilewill be bigger, to be contrary, the shatf resistance at the upper segment of the socketperiod will take a more important part. Ceteris paribus, the thickness of sediment effectsthe bearing capacity and failure behavior barely. However, the pile settlement developswith the slurry in ultimate state. And, based on the premise that the pile has enoughstrength, the plasticity developing zone and the failure of the pile is relavant to thecharacteristic of the rock and socket depth. For the pile with shorter socket depth orworse embdded rock, the plastic area firstly apears at the bottom of the socket section.