Experimental Study on Engineering Behavior of Solidified Soil for Scour Repair and Protection  

作　　者：WU Xiao-ni LI Ru-yu SHU Jian TANG Chao CHEN Jin-jian WANG Hui-li JIANG Hai-li WANG Xiao 

机构地区：[1]State Key Laboratory of Ocean Engineering,Department of Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]Shanghai Road and Bridge Group Co.,Ltd.,Shanghai 200433,China [3]Shanghai Engineering Research Center of Urban Infrastructure Renewal,Shanghai 200032,China [4]Jiangsu Kunze Technology Co.,Ltd.,Nanjing 210000,China

出　　处：《China Ocean Engineering》2024年第4期625-635,共11页中国海洋工程（英文版）

基　　金：financially supported by the Science and Technology Commission Foundation of Shanghai(Grant Nos.22DZ1208903,20DZ2251900);the National Natural Science Foundation of China(Grant No.51679134)。

摘　　要：A new scour countermeasure using solidified slurry for offshore foundation has been proposed recently.Fluidized solidified slurry is pumped to seabed area around foundation for scour protection or pumped into the developed scour holes for scour repair as the fluidized material solidifies gradually.In the pumping operation and solidification,the engineering behaviors of solidified slurry require to be considered synthetically for the reliable application in scour repair and protection of ocean engineering such as the pumpability related flow value,flow diffusion behavior related rheological property,anti-scour performance related retention rate in solidification and bearing capacity related strength property after solidification.In this study,a series of laboratory tests are conducted to investigate the effects of mix proportion(initial water content and binder content)on the flow value,rheological properties,density,retention rate of solidified slurry and unconfined compressive strength(UCS).The results reveal that the flow value increases with the water content and decreases with the binder amount.All the solidified slurry exhibits Bingham plastic behavior when the shear rate is larger than 5 s^(-1).The Bingham model has been employed to fit the rheology test results,and empirical formulas for obtaining the density,yield stress and viscosity are established,providing scientific support for the numerical assessment of flow and diffusion of solidified slurry.Retention rate of solidified slurry decreases with the water flow velocity and flow value,which means the pumpability of solidified slurry is contrary to anti-scour performance.The unconfined compressive strength after solidification reduces as the water content increases and binder content decreases.A design and application procedure of solidified soil for scour repair and protection is also proposed for engineering reference.

关 键 词：scour repair and protection solidified soil PUMPABILITY STRENGTH flow properties anti-scour performance 

分 类 号：P75[天文地球—海洋科学]