Press-in open caisson method, which sinks into soil with the aid of mechanical pressure without excavation, is becoming an important method of construction in extremely soft foundations. However, many engineering problems are prone to occur in the construction of caissons, such as sinking and large deformation. In this study, the stratigraphic response model, such as soil migration during the press-in process of open caisson, is focused on. Through model tests of soil and caissons, the migration patterns of each part of the soil were carried out, and the mechanism underlying the stratigraphic response pattern was investigated. The three primary conclusions are as follows: 1) The bottom edge foot of caisson produces lateral extrusion on surrounding soil in the range of 10 cm (20%H) below, resulting in lateral movement of soil. 2) two kinds of plug, i.e., “wedged” and “unwedged” plugs exist, and the driven forces for the soil migration can be divided into three stages, i.e., caused by soil plug with active arch, by soil plug with passive arch and caused by soil squeezing effect. 3) there is a significant linear correlation between the soil plug changes, the horizontal movement of the deep soil body, and the displacement of the surface uplift. The soil plugging effect and squeezing effect are interacted and enhanced with each other. This study provides a new understanding of the stratigraphic response in the construction of press-in open caissons, and guides safety control of open caissons construction.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Investigation on the Stratigraphic Response and Plugging Effect Induced by Press-In Open Caisson in Mucky Soil


    Additional title:

    KSCE J Civ Eng


    Contributors:
    Wang, Yongzhi (author) / Liu, Mengbo (author) / Liao, Shaoming (author) / Yi, Qiong (author) / He, Junzuo (author) / Liu, Linqi (author) / Gong, Zhiqun (author) / Li, Kaiying (author)

    Published in:

    Publication date :

    2023-05-01


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Open caisson construction tool

    CHEN JIANNING / YAN LING / GUO YIXIAN et al. | European Patent Office | 2021

    Free access

    Open caisson construction method

    XIE GUANGWU / LUO JINLIANG / MAO ZHIMEI et al. | European Patent Office | 2020

    Free access

    Floating operation platform of open caisson soil body excavation equipment

    CHU DENGWANG / WU WENFEI / ZHU YANFEI et al. | European Patent Office | 2023

    Free access

    Large open caisson sinking construction method

    PAN GUOQIAO / HU XIANPING / YU FEI | European Patent Office | 2023

    Free access

    Open drain caisson for wasted oil recovery

    European Patent Office | 2020

    Free access