PDF(6756 KB)
New Trends in Geotechnical Engineering Resilience Development Inspired from an International Academic Conference
BAO Cheng-gang, LU Yi-wei, ZHAO Xu-dong
Journal of Changjiang River Scientific Research Institute ›› 2025, Vol. 42 ›› Issue (6) : 131-138.
PDF(6756 KB)
PDF(6756 KB)
New Trends in Geotechnical Engineering Resilience Development Inspired from an International Academic Conference
In September 2023, the 12th International Conference on Geosynthetics (12th ICG) was held in Rome under the theme “Leading the Way to a Resilient Planet”. By reviewing and synthesizing three invited lectures,four keynote lectures, and major papers from the conference, we found that “resilience” and “sustainability” would be important future directions and they reflect the fundamental demands in the entire geotechnical engineering field. We put forward some future directions, particularly in the following areas, which were expected to become important research topics: (1) Life-cycle design will become the guiding approach for engineering design. This entails not only considering the construction phase and initial costs but also addressing the full operational lifespan and post-operational conditions and expenditures; (2) Reliability-based design methods and risk analysis, grounded in probability theory, will emerge as one of the principal methodologies for engineering design; (3) Prototype monitoring techniques will become indispensable tools for diagnosing engineering behavior and will serve as the foundation of life-cycle design. Various testing and monitoring technologies are expected to advance further; (4) More resilient and durable materials (such as geosynthetics) will continue to be developed and widely applied; (5) New and more resilient structural forms will emerge, and research into their working mechanisms will enter a new phase with enhanced simulation capabilities; (6) The intrinsic characteristics of rock masses as continuous media with structural planes and soils as particulate media will receive greater consideration in rock mechanics and soil mechanics research; (7) New numerical analysis methods(such as the Discontinuous Deformation Analysis, DDA) and artificial intelligence (AI) technologies will be increasingly integrated into geotechnical engineering, gradually transforming its design and analytical methodologies. In China, research has already begun in most of these areas, albeit to varying extents: some areas have made significant progress and are beginning to be applied in practice, such as (3), (4), and (7); Others have yielded some results but face divergent views and complicated paths forward, such as (2); Some areas have been recognized for their necessity and importance, but practical implementation is still lacking, such as (1); Others have yet to be initiated and require a renewed understanding of their significance, such as (5) and (6). This analysis inevitably reflects a limited perspective, and the author humbly invites comments and insights from readers.
geosynthetics / resilience and sustainability / life-cycle design / reliability-based analysis / prototype monitoring techniques / new material development / new structural forms / environmental factors
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
包承纲, 高大钊, 张庆华. 地基工程可靠度分析方法研究[M]. 武汉: 武汉测绘科技大学出版社, 1997.
(
|
| [6] |
|
| [7] |
|
| [8] |
孙蕊. 加筋土边坡静动力可靠度分析及多源信息融合反演研究[D]. 上海: 同济大学, 2022.
(
|
| [9] |
GBJ 68—1984, 建筑结构设计统一标准[S]. 北京: 中国建设工业出版社, 1984.
(GBJ 68—1984, Unified Standards for the Design of Structures[S]. Beijing: China Construction Industry Press, 1984. (in Chinese))
|
| [10] |
包承纲, 吴天行. 多层地基沉降的概率分析[J]. 中国科学(a辑), 1985, 15(11):1038-1048.
(
|
| [11] |
GB 50216—1994, 铁路工程结构可靠度设计统一标准[S]. 北京: 中国计划出版社, 1994.
(GB 50216—1994, Unified Design Standard for Reliability of Railway Engineering Structures[S]. Beijing: China Planning Press, 1994. (in Chinese))
|
| [12] |
|
| [13] |
包承纲. 土工合成材料界面特性的研究和试验验证[J]. 岩石力学与工程学报, 2006, 25(9):1735-1744.
(
|
| [14] |
|
| [15] |
郭培玺, 林绍忠. 粗粒料力学特性的DDA数值模拟[J]. 长江科学院院报, 2008, 25(1):58-60,69.
采用非连续变形分析方法（DDA）研究粗粒料的力学特性。研究了二维粗粒料颗粒的随机生成方法，按照粗粒料级配曲线随机生成松散分布的颗粒，应用DDA模拟重力作用下颗粒在承模筒内的下落过程并形成相互接触的堆积体，以此建立粗粒料数值模拟试验模型。参照粗粒料室内三轴试验的加载过程，应用DDA进行粗粒料力学特性的数值模拟试验，所得应力应变曲线与三轴试验曲线基本吻合，说明DDA数值模拟应用于粗粒料力学特性的研究是可行的。文中还给出了反映颗粒相互作用的若干组构要素的分布情况。
(
In this paper, DDA (discontinuous deformation analysis) is used to study the mechanical characteristics of coarse granular materials. In order to establish the numerical simulation specimen, the 2-D random particle generating algorithm of granular materials is studied. Loose particles are randomly generated according to the gradation curve. Under the action of the gravitational load, the packing process of the particles inside a rectangular container is simulated by DDA so that a heap of the particles which contact each other is formed. On the basis of the heap, the specimen is then established. With reference to the loading process of the tri-axial laboratory test, 2 D numerical simulation on the mechanical characteristics of coarse granular materials is performed also by the DDA. The stress strain curves obtained by the numerical simulations are basically in agreement with the results by the tri axial laboratory test. It indicates the numerical simulation is suitable for the mechanical characteristic research of coarse granular materials. In addition, the distribution of several fabric elements about interaction between particles is also prese
|
| [16] |
邱宽红, 林绍忠, 黄斌. 基于DDA的膨胀土边坡破坏过程模拟[J]. 长江科学院院报, 2009, 26(11):58-61.
采用非连续变形分析方法 DDA 模拟膨胀土边坡的破坏过程。根据膨胀土边坡浅层破坏特征和 Mohr-Coulomb 准则，设置了 3 组潜在剪切破坏面，它们互相切割形成块体系统。基于试验数据，假定了土体变形参数和抗剪强度参数与含水量的关系。土体的吸湿膨胀作用按初应变考虑。计算结果表明，膨胀土边坡在吸湿膨胀和强度降低后发生浅层顺坡向滑动破坏，与工程实际破坏现象吻合。建立的计算模型，为进一步研究膨胀土边坡的稳定性和加固措施奠定了基础。
(
Discontinuous deformation analysis （ DDA ） is used to simulate the failure process of expansive soil slopes ． According to the characteristic of shallow landslide of expansive soil slopes and the Mohr-Coulomb criterion ， three groups of potential failure planes, which cut each other and generate block system, are assumed. On the basis of experimental data, relationships between the material parameters and the water content of expansive soil are assumed ． The strain of hygroscopic expansion is treated as initial strain ． The computed result shows that shallow landslide of an expansive soil slope happens after swelling and shear strength reduction due to the moisture absorption. This result is in accordance with the failure of expansive soil slopes in practice. The calculation model established in this paper provides a sound base for further studies of stability and reinforcement measures of expansive soil slopes.
|
| [17] |
|
| [18] |
DE GUZMAN E M B,
|
| [19] |
|
| [20] |
包承纲, 童军, 丁金华. 土工合成材料流变参数合理选择的研究[J]. 岩土工程学报, 2015, 37(3):410-418.
(
|
| [21] |
丁金华, 周武华. HDPE土工格栅在有约束条件下的蠕变特性试验[J]. 长江科学院院报, 2012, 29(4): 49-51, 56.
土工格栅的蠕变特性是影响其在永久性加筋土结构中应用的重要因素之一。目前，大多数蠕变试验是在无约束条件下进行的，与格栅在加筋土结构中应用的状态和条件有明显差别。采用HDPE土工格栅进行了一系列在砂土中不同荷载水平下的侧限约束蠕变试验，获得了格栅在砂土中的蠕变发展规律；并与无约束(在空气中)的蠕变试验成果相对比，结果表明，侧限约束可以显著减小格栅的蠕变量。
(
Creep of geogrid is an important property which affects its application in permanent reinforced structures. At the present time, most of the creep tests are carried out under unconfined conditions which were obviously different from the actual status of geogrid used in geotechnical engineering structures. A series of confined creep tests on HDPE (High Density PolyEthylene) geogrid are carried out in granular soil. The relation between creep deformation and time is obtained under different vertical pressures. The results show that the confined creep strain are smaller than that obtained by common unconfined creep tests. Sand confinement could remarkably reduce the creep of geogrid.
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
/
| 〈 |
|
〉 |
