Experimental Study on Clogging Characteristics of Silt Soft Soil in Nansha District of Guangzhou  

作　　者：Dengheng Zheng Yueqin Wu Huibing Cheng Jijie Du Dengheng Zheng;Yueqin Wu;Huibing Cheng;Jijie Du(School of Transportation and Logistics, Guangzhou Railway Polytechnic, Guangzhou, China;School of Earth Science and Engineering, Sun Yat-sen University, Guangzhou, China;Guangdong Provincial Key Laboratory of Mineral Resources & Geological Processes, Guangzhou, China)

机构地区：[1]School of Transportation and Logistics, Guangzhou Railway Polytechnic, Guangzhou, China [2]School of Earth Science and Engineering, Sun Yat-sen University, Guangzhou, China [3]Guangdong Provincial Key Laboratory of Mineral Resources & Geological Processes, Guangzhou, China

出　　处：《Open Journal of Applied Sciences》2024年第10期2835-2849,共15页应用科学（英文）

摘　　要：The silt soft soil in Nansha District of Guangzhou was the softest soft soil in China. It had the characteristics of high natural water content, high compressibility, long consolidation time, and complex layered distribution of soil layers. These characteristics formed the clogging characteristics of silt soft soil, which greatly increased the construction difficulty and hindered the construction progress. Therefore, based on the basic physical and mechanical properties of silt soft soil in Nansha District of Guangzhou, this paper evaluated the clogging characteristics of three silt soft soil areas in Nansha District of Guangzhou through long-term permeability test, and carried out scanning electron microscope test to explore the influence of different parameters and microstructure on the clogging difficulty of silt soft soil. The results showed that the silt soft soil Zone I and Zone II (shallow layer) in Nansha District of Guangzhou were divided into slight siltation levels, and the silt soft soil Zone III (deep layer) was mild siltation level. Large pores were widely distributed in shallow silt soft soil, while the continuity of large pores in deep silt soft soil was poor. The migration of fine particles that failed to establish contact with surrounding particles in the soil blocks the small pores of seepage and thus produces siltation.The silt soft soil in Nansha District of Guangzhou was the softest soft soil in China. It had the characteristics of high natural water content, high compressibility, long consolidation time, and complex layered distribution of soil layers. These characteristics formed the clogging characteristics of silt soft soil, which greatly increased the construction difficulty and hindered the construction progress. Therefore, based on the basic physical and mechanical properties of silt soft soil in Nansha District of Guangzhou, this paper evaluated the clogging characteristics of three silt soft soil areas in Nansha District of Guangzhou through long-term permeability test, and carried out scanning electron microscope test to explore the influence of different parameters and microstructure on the clogging difficulty of silt soft soil. The results showed that the silt soft soil Zone I and Zone II (shallow layer) in Nansha District of Guangzhou were divided into slight siltation levels, and the silt soft soil Zone III (deep layer) was mild siltation level. Large pores were widely distributed in shallow silt soft soil, while the continuity of large pores in deep silt soft soil was poor. The migration of fine particles that failed to establish contact with surrounding particles in the soil blocks the small pores of seepage and thus produces siltation.

关 键 词：Silt Soft Soil Clogging Characteristics Permeability Coefficient MICROSTRUCTURE 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]