A New Calculation Method for Life Cycle Settlement of Soft Ground with Creep Treated by Columns

Wu，Pei Chen1; Feng，Wei Qiang2,5; Qin，Jie Qiong3; Liu，Kai Fu4; Yin，Jian Hua1

2023-06-01

10.1061/IJGNAI.GMENG-7899

International Journal of Geomechanics   影响因子和分区

1532-3641

1943-5622

For soft soils, creep settlement plays an important role in the full life cycle performance of infrastructures, which is a serious concern for engineers and researchers. Columns such as deep cement mixed (DCM) soil columns are commonly adopted to treat soft grounds in order to reduce the life cycle settlement of the infrastructures. However, the creep behavior of soft grounds treated by DCM soil columns is often ignored, inducing underestimated total settlements or unexpected differential settlements. In this study, a new calculation method is developed for the life cycle settlement of column-improved soft grounds by considering the creep of soft soils and load transfer between the columns and the surrounding soils. A physical model test with double-layer soil improved by DCM soil columns is designed and performed to demonstrate the feasibility of the calculation method. It is found that the settlements calculated by the proposed method show good agreement with the measured data in the physical model. A parametric study is conducted, revealing that the calculated settlement of the double-layer soil improved by DCM columns can be largely influenced by the stress concentration ratio, the permeability of the DCM columns, and the area replacement ratio. Finally, the proposed method is applied to calculate the settlement in a real project.

Calculation method Consolidation settlement Creep DCM soil columns Physical model test

SCI ; EI

英语

其他

National Natural Science Foundation of China["52278356","51878619","52078465"] ; Shenzhen Science and Technology Innovation Commission[JCYJ20210324105210028] ; Natural Science Foundation of Guangdong Province, China[2022A1515010118] ; General Research Fund (GRF)["PolyU152179/18E","PolyU 152130/19E","PolyU 15210020"] ; Research Impact Fund[R5037-18] ; Research Grants Council of Hong Kong Special Administrative Region Government of China[T22-502/18-R] ; Research Institute of Land and Space["CD82","CD7A"]

Engineering

Engineering, Geological

WOS:000971249600019

ASCE-AMER SOC CIVIL ENGINEERS

20231714010408

Geotechnical engineering ; Life cycle ; Soil cement ; Soil mechanics ; Soils

Roads and Streets:406.2 ; Civil Engineering, General:409 ; Concrete:412 ; Geology and Geophysics:481 ; Soils and Soil Mechanics:483.1 ; Materials Science:951

2-s2.0-85153339928

Scopus

1.Dept. of Civil and Environmental Engineering,Hong Kong Polytechnic Univ.,Hong Kong,Hong Kong
2.Dept. of Ocean Science and Engineering,Southern Univ. of Science and Technology,Shenzhen,China
3.School of Civil Engineering,North China Univ. of Technology (NCUT),Beijing,China
4.School of Civil Engineering and Architecture,Zhejiang Sci-Tech Univ.,Hangzhou,310018,China
5.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,China

Wu，Pei Chen,Feng，Wei Qiang,Qin，Jie Qiong,et al. A New Calculation Method for Life Cycle Settlement of Soft Ground with Creep Treated by Columns[J]. International Journal of Geomechanics,2023,23(6).

Wu，Pei Chen,Feng，Wei Qiang,Qin，Jie Qiong,Liu，Kai Fu,&Yin，Jian Hua.(2023).A New Calculation Method for Life Cycle Settlement of Soft Ground with Creep Treated by Columns.International Journal of Geomechanics,23(6).

Wu，Pei Chen,et al."A New Calculation Method for Life Cycle Settlement of Soft Ground with Creep Treated by Columns".International Journal of Geomechanics 23.6(2023).