This paper introduces tested results of rock-socketed pile in Nanjing, Wuhan and Chongqing. From a force- transfer model, a distribution of axial force for pile-body and inlaid resistance for rock-socketed pile was deduced. Comparing the results of test and calculation, it shows that the calculation result coincide with the test result.
dieser text legt eine kuyze Einfuehyung ueber die Erfolge wissenschaftlicher Forschungsarbeit in bezug auf die Grundprinzipien der Mechanik von Belastungsuebermittlung der Einlegesteinpfeilers der Durch Benutzung von Ausgleich/Balance der inneren Kraft und Deformationskoordinierung wird das mechanische Modell der Belastungsuebermittlung des Einlegesteinpfeilers aufgestellt. Vom lebendigen Beispiel wird dia Wellenkraft des Steinpfeilera und die Verteilungskurve Einlegebfestigungskraft ausgelegt, man hat diess bereits mit der tatsaechlichen genessenen Kurve verglichen.
Le présent article décrit de façon succincte des résultats de la recherche sur le mécanisme du transfert de chargement du pieu d'ancrage au massif. Une modèle dynamique du transfert de chargement du pieu d¿ancrage au massif est ainsi établie avec l¿application des conditions de l¿équilibre de contraintes internes et de coordination de la déformation. L¿expérimentation sur des exemples réels a permis de mettre à jour des courbes de distribution de la force axiale du corps du pieu et de la force d¿ancrage avec comparaison aux courbes effectivement mesurées in situ.
Rock-socketed piles have been developed basing on the end bearing piles, and differ from end bearing piles, the key of rock-socketed pile is socketed in rock. Transfer mechanism of rock-socketed piles has always been the research focus. Now some evolvements of studies for load transfer mechanism of rock-socketed piles have been gained. Regard socketed segment as a space system, XU[1] analyzed character of load transfer of socketed segment. MING[2] indicated that ultimate bearing capacity of socketed pile was made up of inlaid resistance and end resistance, when deepness socketed in rock was four times diameter, ultimate bearing capacity of piles exerted the best, but technique level of construction has influenced on it. DENG[3] carried out model tests and theory research of load transfer properties and destroy mechanism under vertical load for rock-socketed pile, it showed that inlaid resistance and end resistance were isochronous, bearing capacity lose of pile is due to the plastic zone grow in the interface of pile- rock and crack spread at the side of pile end.
A number of scholars have studied mechanism of load transfer for rock-socketed pile, and some evolvements have been gained.HUANG [4] thought that socket resistance contributes to bearing capacity mostly. When deepness socketed in rock was three times diameter, socket resistance occupy 75 percent of bearing capacity, the optimal length socketed in rock is three times diameter.
When deepness socketed in rock exceed five times diameter, end resistance of socketed pile is zero.
