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学者姓名：陈志波
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Abstract ：
我国近海地震频发,地震作用对海上风电基础与风机结构的稳定性影响大.为了准确有效地计算海上风电结构地震动力响应,该文根据波动理论和斯奈尔定律,推导了基于黏弹性人工边界的三维成层土地震等效节点力计算公式,并验证了其准确性.在此基础上,以福建莆田某风电场地基为例,建立5 MW风机-单桩-成层海床三维一体化数值分析模型,进行了地震作用下的海上风电动力响应分析.研究表明:当地震发生时,地基中不同位置的土体响应不同,对于浅层桩周土体,距离桩基越近,土体加速度响应越小,桩基会对浅层桩周土体的加速度有一定抑制作用;桩基对不同深度的土层剪应变影响也相差较大.对于风机结构而言,最大位移发生在塔架顶部,最大加速度和最大应力发生在塔架中部.
Keyword ：
单桩式海上风电 单桩式海上风电 地震响应 地震响应 成层地基 成层地基 等效节点力 等效节点力 黏弹性人工边界 黏弹性人工边界
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| GB/T 7714 | 陈志波 , 刘海波 , 曹光伟 et al. 基于黏弹性人工边界的成层地基中海上风机地震响应分析 [J]. | 振动与冲击 , 2025 , 44 (3) : 291-300,308 . |
| MLA | 陈志波 et al. "基于黏弹性人工边界的成层地基中海上风机地震响应分析" . | 振动与冲击 44 . 3 (2025) : 291-300,308 . |
| APA | 陈志波 , 刘海波 , 曹光伟 , 何奔 , 曾旭明 , 潘生贵 . 基于黏弹性人工边界的成层地基中海上风机地震响应分析 . | 振动与冲击 , 2025 , 44 (3) , 291-300,308 . |
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Biomineralization based on bacterial enzyme induced carbonate precipitation (BEICP) process is a promising alternative to cement-based ground treatment technology. The bacterial urease used in BEICP process is usually ultrasonic extracted from urease-producing bacteria. To efficiently extract urease with relatively higher activity from bacterial cells, the ultrasonic extraction parameters of urease were optimized in this study. Next, a series of bacterial urease extraction tests and sand column treatment tests were conducted to investigate the effects of vibration amplitude, upper temperature limit, and cooling method on the urease extraction process and biomineralization of sand. The results show that the upper temperature limit is an important factor affecting the extraction efficiency and the activity of the extracted urease solution, and the optimum upper temperature limit is 50 degrees C. The results indicate that increasing vibration amplitude could improve the extraction efficiency, but it hardly affects the urease activity (UA) under the optimal temperature. Continuous cooling could effectively simplify the operation and further improve the efficiency of urease extraction. Under the same urease activity of biotreatment solution, there is no marked difference in calcium carbonate content (CCC) and unconfined compressive strength of biomineralized sand columns prepared by urease solution extracted with different vibration amplitudes and upper temperature limits. The results of this study could provide a reference for application of BEICP technology of urease extraction to large-scale soil treatment. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/).
Keyword ：
Bacterial enzyme induced carbonate Bacterial enzyme induced carbonate Biomineralization Biomineralization precipitation (BEICP) precipitation (BEICP) Soil improvement Soil improvement Ultrasound Ultrasound Urease extraction Urease extraction
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| GB/T 7714 | Lai, Hanjiang , Chen, Yiwei , Cui, Mingjuan et al. Extraction of high activity bacterial urease and its application to biomineralization of soil [J]. | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING , 2025 , 17 (3) : 1847-1861 . |
| MLA | Lai, Hanjiang et al. "Extraction of high activity bacterial urease and its application to biomineralization of soil" . | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17 . 3 (2025) : 1847-1861 . |
| APA | Lai, Hanjiang , Chen, Yiwei , Cui, Mingjuan , Zheng, Junjie , Chen, Zhibo . Extraction of high activity bacterial urease and its application to biomineralization of soil . | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING , 2025 , 17 (3) , 1847-1861 . |
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The interactions between chemical, hydraulic, and mechanical processes in clay soils has garnered significant attention in various fields. It is important to study the transport of chemical substances and the deformation of the clay layer under the combined action of chemical solution and mechanical loading. Clay is a typical porous medium, primarily composed of soil skeleton and pores, with the shape, size, and distribution of clay pores being random, making it difficult to accurately describe using traditional geometry. A fractal model can be used to simulate clay soils. This study leverages the fractal theory of clay, incorporating the generalized effective stress principle in chemical solutions and a fractal model for the diffusion of chemical substances. A chemo-hydro-mechanical coupling model based on fractal theory is developed. Simulation results show that an increase in fractal dimension corresponds to a heightened roughness of the pore surfaces and an increased tortuosity of the pore channels, which significantly amplify the resistance to solute diffusion, thereby retarding the rate of solute transport. As a result, the magnitude of the maximum negative pore pressure within the clay layer, leading to a longer time required for complete pore pressure dissipation. Additionally, the deformation of the clay layer is larger.
Keyword ：
Chemo-osmotic consolidation Chemo-osmotic consolidation Coupled transport Coupled transport Fractal theory Fractal theory Osmotic conductivity Osmotic conductivity
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| GB/T 7714 | Zheng, Xinjiang , Chen, Xianyuan , Chen, Zhibo et al. Modelling solute transport and deformation of clay soil under the chemo-hydro-mechanical coupling actions based on fractal theory [J]. | SCIENTIFIC REPORTS , 2025 , 15 (1) . |
| MLA | Zheng, Xinjiang et al. "Modelling solute transport and deformation of clay soil under the chemo-hydro-mechanical coupling actions based on fractal theory" . | SCIENTIFIC REPORTS 15 . 1 (2025) . |
| APA | Zheng, Xinjiang , Chen, Xianyuan , Chen, Zhibo , Zhu, Mengyuan , Li, Xiaoyue . Modelling solute transport and deformation of clay soil under the chemo-hydro-mechanical coupling actions based on fractal theory . | SCIENTIFIC REPORTS , 2025 , 15 (1) . |
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The serviceability and safety of existing pipelines may be adversely affected by differential ground movements resulting from inappropriate control of face pressure of EPB (earth pressure balance) shield tunnelling. However, previous studies mainly concentrated on deformation mechanisms of continuous pipelines resulting from tunnel face active instability. In this study, 16 three-dimensional physical model tests were conducted to explore the effects of tunnel cover-to-diameter ratio (C/D) and relative tunnel-pipeline position (H/D) on deformation mechanisms of jointed pipeline due to tunnel face passive instability. Moreover, a systematic numerical parametric study was performed to develop calculation charts for estimating joint rotation angle subjected to ground heaves. For tunnel C/D ratios of 1.0 and 1.5, the existing jointed pipeline at 0.7D and 1.2D ahead of tunnel face experiences the highest heave and joint rotation angle, respectively. By increasing C/D ratios from 1.0 to 1.5, the maximum pipeline deformation decreases by up to 84.5%. A dimensionless group, namely relative pipe segment-soil stiffness, is proposed to distinguish relatively rigid and flexible jointed pipelines, and normalised pipe segment length and relative pipe-soil stiffness are also proposed to establish calculation charts for predicting joint rotation angles of relatively rigid and flexible jointed pipelines, respectively.
Keyword ：
calculation chart calculation chart joint joint passive face instability passive face instability pipeline pipeline rotation angle rotation angle
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| GB/T 7714 | Shi, Jiangwei , Lv, Kaiyu , Chen, Zhibo et al. Physical and numerical investigation of deformation mechanisms of jointed pipelines due to passive face instability of EPB shield tunnelling [J]. | CANADIAN GEOTECHNICAL JOURNAL , 2025 , 62 . |
| MLA | Shi, Jiangwei et al. "Physical and numerical investigation of deformation mechanisms of jointed pipelines due to passive face instability of EPB shield tunnelling" . | CANADIAN GEOTECHNICAL JOURNAL 62 (2025) . |
| APA | Shi, Jiangwei , Lv, Kaiyu , Chen, Zhibo , Lu, Hu , Shi, Chao . Physical and numerical investigation of deformation mechanisms of jointed pipelines due to passive face instability of EPB shield tunnelling . | CANADIAN GEOTECHNICAL JOURNAL , 2025 , 62 . |
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Earthquakes occur frequently in China ' s offshore areas, and seismio aotions significantly affeot the stability of offshore wind power foundations and wind turbine structures. Here, to correctly and effectively calculate seismic dynamic responses of offshore wind power structures, a viscoelastic artificial boundary-based 3D layered soil seismic equivalent node force calculation formula was derived according to wave theory and Snell law, and its correctness was verified. Then, taking the foundation of a certain wind power field in Putian, Fujian Province as an example, a 3D integrated numerical analysis model for 5 MW wind turbine-single pile-layered seabed was established to analyze dynamic response of offshore wind power under earthquake. The study showed that when earthquake occurs, responses of soil bodies at different positions in foundation are different, for shallow soil body around pile, the closer the distance to pile foundation, the smaller the soil body acceleration response, pile foundation can have a certain suppressing effect on acceleration of shallow layer soil body around piles; effects of pile foundation on shear strain of soil layers at different depths also have larger differences; for wind turbine structure, the maximum displacement occurs at tower top, while the maximum acceleration and the maximum stress occur in middle of tower. © 2025 Chinese Vibration Engineering Society. All rights reserved.
Keyword ：
Dynamic response Dynamic response Earthquake effects Earthquake effects Earthquake engineering Earthquake engineering Offshore structures Offshore structures Offshore wind turbines Offshore wind turbines Pile foundations Pile foundations Piles Piles Seismic response Seismic response Shear deformation Shear deformation Shear flow Shear flow Shear strain Shear strain Structural dynamics Structural dynamics Vibration analysis Vibration analysis
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| GB/T 7714 | Chen, Zhibo , Liu, Haibo , Cao, Guangwei et al. Seismic response analysis of offshore wind turbine in layered subsoils based on viscoelastic artificial boundary [J]. | Journal of Vibration and Shock , 2025 , 44 (3) : 291-300 and 308 . |
| MLA | Chen, Zhibo et al. "Seismic response analysis of offshore wind turbine in layered subsoils based on viscoelastic artificial boundary" . | Journal of Vibration and Shock 44 . 3 (2025) : 291-300 and 308 . |
| APA | Chen, Zhibo , Liu, Haibo , Cao, Guangwei , He, Ben , Zeng, Xuming , Pan, Shenggui . Seismic response analysis of offshore wind turbine in layered subsoils based on viscoelastic artificial boundary . | Journal of Vibration and Shock , 2025 , 44 (3) , 291-300 and 308 . |
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Gap-graded soil, characterized by the absence of certain particle sizes, is commonly used in infrastructure projects such as dams and roadbeds. A comprehensive understanding of both the macro- and micro-mechanical behaviors of discontinuously graded soils is essential for their effective use in engineering applications. In this study, drainage triaxial compression tests were conducted on four gap-graded soil samples with different fine-grain contents mainly using the DEM method, whereas the flexible boundary part was performed using the FDM-DEM method. The contacts were classified based on the magnitude of contact forces between coarse and fine particles, considering the coordination number of the particles involved and the normal angular distribution of these contacts. This classification enabled a detailed analysis of how fine particles contribute to stress transmission and structural evolution during shearing. The fabric tensor for these contact types provided further insights into the anisotropy of samples during shearing. On the microscopic scale, the evolution of contact numbers was found to closely align with the observed stress–strain behaviors. Increasing fine particle content significantly altered the role of fine particles in the stress transmission process. With low content of finer particles, initially, fine particles were situated within the voids formed by coarse particles, and the fine particles are gradually embedded into the coarse particles during the loading process. With the increase of fine particle content, fine particles constantly aggregate to block coarse particles and become the main medium of stress transmission. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.
Keyword ：
Infiltration Infiltration Soil testing Soil testing
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| GB/T 7714 | Chen, Zhibo , Xie, Yongning , Wu, Yulong . Macro- and Micromechanical Behavior of Gap-Graded Soil in Drained Triaxial Tests: A Numerical Study [J]. | Geotechnical and Geological Engineering , 2025 , 43 (5) . |
| MLA | Chen, Zhibo et al. "Macro- and Micromechanical Behavior of Gap-Graded Soil in Drained Triaxial Tests: A Numerical Study" . | Geotechnical and Geological Engineering 43 . 5 (2025) . |
| APA | Chen, Zhibo , Xie, Yongning , Wu, Yulong . Macro- and Micromechanical Behavior of Gap-Graded Soil in Drained Triaxial Tests: A Numerical Study . | Geotechnical and Geological Engineering , 2025 , 43 (5) . |
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Basement excavation inevitably caused stress changes in the ground, resulting in additional deformations to nearby infrastructures. In this study, a large-scale basement supported by dual-circular props in heterogeneous soft stratum of is extensively monitored to investigate ground and structure deformations. Moreover, three-dimensional numerical analyses are performed to evaluate the effectiveness of circular props to restrain basement excavation-induced additional deformations. It is found that the lateral movements observed at the top of retaining walls are up to 79.1% of the maximum lateral wall movements. By using circular props in such large-scale basement, the respective lateral wall movements and maximum ground surface settlements are 0.04% H − 0.41% H (excavation depth) and 0.61% He (final excavation depth), which are close to the values in literature. Because of basement excavation, the interior columns always experience heaves, while the retaining walls experience heaves first followed by settlements. Basement excavation-induced maximum heaves and settlements in the interior columns and retaining walls are 0.13% H and 0.057% H, respectively, which are substantially smaller than that the values observed in building basement and metro station basement excavations in soft clays. Under a given volume of concrete props, numerical parametric study shows that ground settlements and wall deflections due to basement excavation with circular props are within the values induced by basement excavation with rectangular arrangements of concrete props. Since construction space of basement supported by circular props can be substantially enlarged, the use of circular props has the advantages to control basement excavation-induced additional deformations. © 2025 Elsevier Ltd
Keyword ：
Concretes Concretes Excavation Excavation Numerical analysis Numerical analysis Retaining walls Retaining walls Settlement of structures Settlement of structures Wall flow Wall flow Walls (structural partitions) Walls (structural partitions)
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| GB/T 7714 | Shi, Jiangwei , Chen, Zhibo , Chen, Yonghui et al. Deformation characteristics of a large-scale basement supported by dual-circular props in heterogeneous soft stratum: Field and numerical investigation [J]. | Tunnelling and Underground Space Technology , 2025 , 166 . |
| MLA | Shi, Jiangwei et al. "Deformation characteristics of a large-scale basement supported by dual-circular props in heterogeneous soft stratum: Field and numerical investigation" . | Tunnelling and Underground Space Technology 166 (2025) . |
| APA | Shi, Jiangwei , Chen, Zhibo , Chen, Yonghui , Wang, Buxiang , Ni, Xiaodong , Zheng, Jinhuo . Deformation characteristics of a large-scale basement supported by dual-circular props in heterogeneous soft stratum: Field and numerical investigation . | Tunnelling and Underground Space Technology , 2025 , 166 . |
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Earthquakes occur frequently in China's southeast coastal areas. Therefore, in this region, offshore wind turbine (OWT) structures are highly likely to be simultaneously affected by wind, waves and earthquakes. Firstly, based on the wave theory and Snell's law, this paper deduces the formulas for the equivalent seismic nodal force of layered soils suitable for viscoelastic artificial boundaries. Compared with a method that employs an average modulus to calculate the seismic motion input of layered soils, the proposed formulas enable more accurate simulation of seismic wave propagation in layered soils. Based on the formulas, an integrated numerical model incorporating a nacelle, tower, monopile and layered seabed is established to analyse the dynamic response of large-diameter monopiles of OWTs under stochastic wind, wave and seismic loads. The analysis results show that the displacement and stress responses under combined wind-wave loads are larger than those under the individual wind/wave load, showing obvious amplification effects, but the maximum acceleration at the mudline indicates an inhibitory effect, which is not consistent with a superposition principle. Under the combined wind-wave-seismic loads, the monopile acceleration is primarily attributable to the seismic load, with wind and wave loads mitigating the acceleration response caused by the seismic load. Moreover, the seismic load has little effect on the monopile's stress but increases its displacement, especially at the mudline. Thus, additional treatment for foundation deformation is needed for the monopile design in seismic areas. © 2025
Keyword ：
Dynamic response Dynamic response Earthquakes Earthquakes Loads (forces) Loads (forces) Offshore oil well production Offshore oil well production Offshore wind turbines Offshore wind turbines Seismic design Seismic design Seismic waves Seismic waves Stochastic models Stochastic models Stochastic systems Stochastic systems Viscoelasticity Viscoelasticity Wave propagation Wave propagation
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| GB/T 7714 | Chen, Zhibo , Chen, Feng , Liu, Haibo et al. Dynamic response of offshore wind turbine monopile foundations in layered soils under wind, wave and earthquake actions [J]. | Applied Ocean Research , 2025 , 162 . |
| MLA | Chen, Zhibo et al. "Dynamic response of offshore wind turbine monopile foundations in layered soils under wind, wave and earthquake actions" . | Applied Ocean Research 162 (2025) . |
| APA | Chen, Zhibo , Chen, Feng , Liu, Haibo , Cao, Guangwei , Huang, Wei . Dynamic response of offshore wind turbine monopile foundations in layered soils under wind, wave and earthquake actions . | Applied Ocean Research , 2025 , 162 . |
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Sand columns have been widely used to accelerate drainage and then improving the mechanical properties of soft soil foundations. The sand column has also been introduced into the triaxial test by researchers, in the center of the cylindrical specimen, to greatly accelerate drainage and consolidation process. The objective of this paper is to evaluate the consolidation properties of the triaxial cylindrical specimen considering the presence of a sand column, and then to propose a consolidation model that simulates the consolidation process of the triaxial test. The consolidation equations were derived considering the drainage of the specimen with a sand column composed of both vertical and double-radial flows. Then the analytical solution of the model was obtained based on specific initial and boundary conditions. The comparison between the consolidation model and the laboratory tests yielded highly consistent. The case study demonstrated that the proposed consolidation model accurately simulates the evolution of average pore pressure and degree of consolidation in triaxial specimens containing a sand column. The studies on the consolidation parameters showed that there were different effects on the drainage rate for the diameter of specimen, the permeability coefficients of specimen and sand column, as well as the radius of the sand column.
Keyword ：
analytical solutions analytical solutions consolidation model consolidation model consolidation properties consolidation properties cylindrical specimen cylindrical specimen sand column sand column triaxial test triaxial test
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| GB/T 7714 | Chen, Zhibo , Zhu, Jungao , Zheng, Xinjiang et al. Modeling of Drain Consolidation in the Quick Triaxial Test and Its Analytical Solution [J]. | INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS , 2024 , 48 (17) : 4178-4187 . |
| MLA | Chen, Zhibo et al. "Modeling of Drain Consolidation in the Quick Triaxial Test and Its Analytical Solution" . | INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS 48 . 17 (2024) : 4178-4187 . |
| APA | Chen, Zhibo , Zhu, Jungao , Zheng, Xinjiang , Wang, Lei . Modeling of Drain Consolidation in the Quick Triaxial Test and Its Analytical Solution . | INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS , 2024 , 48 (17) , 4178-4187 . |
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Granite residual soils are highly susceptible to softening and disintegration when exposed to water, extremely easy to cause geological disasters. Biomineralization can be a promising method to improve the anti-disintegration of granite residual soils. However, due to the low permeability of the soil, it may be difficult to effectively or efficiently improve the anti-disintegration of granite residual soils using conventional premix or spray methods. This study proposes a premix-spray biomineralization method to improve the anti-disintegration of granite residual soils. The bacterial suspension, bioslurry, and crude soybean urease solution were used as the urea hydrolysis media in this study. The biomineralization of granite residual soils by premix, spray, and premix-spray methods was compared based on the disintegration test and calcium carbonate content measurement. The scanning electron microscope observation, energy-dispersive X-ray spectroscopy, and X-ray diffraction were also conducted to clarify the microscopic characteristics of the biotreated granite residual soils. The test results indicate that the premix-spray method could effectively improve the anti-disintegration of granite residual soil, and the bioslurry is the optimal urea hydrolysis medium for the premix treatment. The sample prepared by premixing with bioslurry followed by 3 cycles of spray treatment could remain relatively stable with no apparent disintegration or cracking within 24 h of immersion. The underlying mechanisms for the anti-disintegration improvement of granite residual soils with biomineralization may mainly include the pore filling, encapsulating bonds between soil particles, and biocementation of adjacent soil particles by the precipitated calcium carbonate crystals.
Keyword ：
Anti-disintegration Anti-disintegration Bioslurry Bioslurry Granite residual soil Granite residual soil Premix-spray biomineralization method Premix-spray biomineralization method Underlying mechanism Underlying mechanism
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| GB/T 7714 | Lai, Han-Jiang , Ding, Xing-Zhi , Cui, Ming-Juan et al. Premix-spray biomineralization method for anti-disintegration improvement of granite residual soil [J]. | ACTA GEOTECHNICA , 2024 , 20 (3) : 1251-1265 . |
| MLA | Lai, Han-Jiang et al. "Premix-spray biomineralization method for anti-disintegration improvement of granite residual soil" . | ACTA GEOTECHNICA 20 . 3 (2024) : 1251-1265 . |
| APA | Lai, Han-Jiang , Ding, Xing-Zhi , Cui, Ming-Juan , Zhou, Yan-Jun , Zheng, Jun-Jie , Chen, Zhi-Bo . Premix-spray biomineralization method for anti-disintegration improvement of granite residual soil . | ACTA GEOTECHNICA , 2024 , 20 (3) , 1251-1265 . |
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