The Physical Model Test And The Settlement Calculation Of The Underwater Stone Column

In recent years, the foundation settlement is one of the issues of concern. Considering thecharacteristics of economy, reliability, convenient construction and so on, the technique ofvibro-replacement stone column composite foundation has been widely applied in the groundtreatment engineering in our country. With the rapid development and wide application of thevibroflotation technique, vibroflotation technique dealing with practical engineering soft foundationis used in offshore engineering. But because of the research lack of the characteristics of the bearingcapacity and the settlement of vibro-replacement stone column composite foundation under thewater, the understanding of its working mechanism is still very fuzzy, and the experience andengineering analogy method are mainly relied on to design composite foundation. In order tofurther improve the quality and safety indicators of vibro-replacement stone column compositefoundation engineering, the working mechanism should be explored in depth.In this paper, firstly, the research significance and application at home and abroad is analyzed,the problems and shortcomings of the technique of vibro-replacement stone column under the waterare pointed out, and the research ideas are put forward. Used similarity theory model, the load testson single pile of replacement stone column under the water is simulated, the pile settlement andfailure mechanism are studied. According to the test results, the curve of the relation between pilesettlement and time under the load and lateral deformation curve are obtained, then the failuremechanism and influencing factors of the pile body are analyzed. Through the research of singlepile settlement calculation and the settlement calculation of traditional vibro-replacement stonecolumn composite foundation, the problems of the underwater vibro-replacement stone column arepresented, and the settlement calculation of Priebe method is introduced. After the analyzing andimproving the Priebe method, it is introduced to the settlement calculation of vibro-replacementstone column composite foundation in offshort engineering. The computational formula isestablished combined with the off short engineering example to evaluate the foundation settlement.The settlement calculation result is compared with the measured settlement, indicating this methodhad certain practicality.