A5006581685- Microbial Applications in Construction Materials
- Grouting, Rheology, and Soil Mechanics
- Geotechnical Engineering and Soil Mechanics
- Rock Mechanics and Modeling
- Hydraulic Fracturing and Reservoir Analysis
- Geotechnical Engineering and Underground Structures
- Seismic Imaging and Inversion Techniques
- Geotechnical Engineering and Soil Stabilization
- Drilling and Well Engineering
- Landslides and related hazards
- Enhanced Oil Recovery Techniques
- Corrosion Behavior and Inhibition
- Concrete and Cement Materials Research
- Calcium Carbonate Crystallization and Inhibition
- Fluid Dynamics Simulations and Interactions
- Geotechnical Engineering and Analysis
- Granular flow and fluidized beds
- Marine Sponges and Natural Products
- Geological Modeling and Analysis
- Sports Dynamics and Biomechanics
- Plant Molecular Biology Research
- Building materials and conservation
- Dam Engineering and Safety
- Aluminum Alloys Composites Properties
- Cancer Research and Treatments
Chongqing University
2020-2024
Qingdao Agricultural University
2024
Hong Kong University of Science and Technology
2017-2020
University of Hong Kong
2017-2020
Abstract Microbially induced calcium carbonate precipitation (MICP) has attracted much attention as a promising green technique for soil improvement. Despite the significance of pattern in mind, constitutive relations or numerical models considering finite‐strain mechanical effects various patterns are rarely developed. In this paper, we propose novel 3D DEM modeling scheme by using coarse particles to represent sand grains and fines cementing agents, reproduce MICP‐treated sand. Based on...
Microbially induced calcite precipitation (MICP), a newly green method, was investigated as possible solution to rainfall-induced erosion of sandy slopes. A series model slopes prepared with sands different gradations were treated by MICP using the surface spraying method. The subjected scour under artificial rainfall an intensity 700 mm/h. internal soil loss, surficial volumes flow and flow, gradation residual in slope measured indicators characteristics results showed that untreated larger...
Microbiologically induced calcium carbonate precipitation (MICP), as a promising reinforcement technique, has been investigated extensively through element and model tests. However, tests on the particle-scale behaviors of MICP bonds are rarely conducted yet, which constrains development constitutive numerical models MICP-treated sands. In this paper, set devices is designed to form between spherical quartz beads (SQBs) calcareous (SCBs) investigate microscopic compression behavior...
Degradation of geomaterials, that is, particle breakage, can be harmful to the full life-cycle stability practical engineering; for example, rockfill dam, energy-pile foundation, railway embankment, and retaining wall. A key issue is how precisely quantify grain crushing during operation project suffers high pressure or dynamic loading. This paper reviews advantages limitations existing breakage indices proposes a new simple index estimating evolution crushing. The without an integral...
In this study, the small-strain shear modulus of a calcareous sand was investigated by conducting bender element tests on both horizontal and vertical planes. The effects sample preparation method, stress path history developing void ratio, parameters in modified Hardin Equation, stiffness anisotropy were examined. test results show that moist tamping samples have least ratio variation among five samples. recovery effective [Formula: see text] = 100 kPa is higher than tests. prepared dry...
Pullout of plate anchors from granular sands is investigated using a novel computational multiscale approach. We employ the material point method (MPM) to solve large deformation boundary value problem and adopt discrete element (DEM) derive history-dependent responses required for each MPM domain. The continuum-discrete hierarchical coupling between DEM not only helps bypass assumption complicated phenomenological constitutive models sand, but also facilitates handling displacement movement...
Abstract This paper presents a multiscale analysis of the classical borehole instability problem in high‐porosity sandstones using hierarchical approach. A rigorous, two‐way message‐passing coupling finite element method and discrete is employed, where employed to solve boundary value constitutive material responses required at each its integration points are derived by solution an embedded representative volume instead assumed phenomenological model. We employ this approach examine...
This study investigated the performance of microbially induced calcite precipitation (MICP) in reinforcing road bases reconstituted with calcareous or silica sands. Four testing models were prepared by surface percolation method at two cementation levels. A series tests for California bearing ratio (CBR) and unconfined compressive strength (UCS) performed to examine biotreated samples model element scales. Scanning electron microscopy (SEM) conducted on specimens sectioned from four base...
Particle breakage is a major factor that determines the strength and deformation of coral sand. Consolidated drained triaxial compression tests under different confining pressures have been conducted on sands as basis for 3D discrete element simulations, focusing particle characteristics. Considering angular overall in numerical model, simulated with fragment replacement method, size equivalent stress are combined criterion to judge occurrence crushing. The validation model proved by...
Abstract This study presents a scalable three‐dimensional (3D) multiscale framework for continuum‐discrete modeling of granular materials. The proposed features rigorous coupling continuum‐based material point method (MPM) and discrete approach element (DEM) to enable cross‐scale boundary value problems pertaining media. It employs MPM solve the governing equations macroscopic continuum domain problem that may undergo large deformation. required loading‐path‐dependent constitutive responses...