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学者姓名：路德春
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摘要 ：
作为衡量土力学特性的关键指标,相对密实度也是划分围岩等级的重要指标,其对隧道掘进时地层沉降和应力的影响十分重大。基于北京工业大学自主开发的盾构隧道掘进模型试验平台,通过开展不同相对密实度土层中隧道的掘进试验,系统测量地表和地层中的沉降和隧道周边的应力。试验结果表明:随着相对密实度的增大,地表和地层中沉降槽的形状由高斯函数分布形变为三角形,深度和宽度均越来越小;掘进过程中地表沉降的出现更加滞后;拱顶和拱肩处的应力路径变得越来越陡,使土体出现明显的剪胀,从而导致地层沉降槽的形状发生上述变化。因此,在模拟隧道掘进时,应考虑不同相对密实度土层的剪胀性,才能合理地预测地表的沉降。
关键词 ：
沉降 沉降 模型试验 模型试验 盾构隧道 盾构隧道 相对密实度 相对密实度 应力路径 应力路径 剪胀性 剪胀性
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| GB/T 7714 | 阿卜杜拉-穆塔里伯·凯特玛斯 , 田雨 , 路德春 et al. 围岩相对密实度对隧道掘进时地层沉降的影响 [J]. | 工业建筑 , 2021 , 51 (07) : 11-17 . |
| MLA | 阿卜杜拉-穆塔里伯·凯特玛斯 et al. "围岩相对密实度对隧道掘进时地层沉降的影响" . | 工业建筑 51 . 07 (2021) : 11-17 . |
| APA | 阿卜杜拉-穆塔里伯·凯特玛斯 , 田雨 , 路德春 , 杜修力 . 围岩相对密实度对隧道掘进时地层沉降的影响 . | 工业建筑 , 2021 , 51 (07) , 11-17 . |
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摘要 ：
<正>2021年是中国共产党成立100周年,《北京工业大学学报》出版一期土木工程学科专刊,谨贺中国共产党百年华诞!党中央历来高度重视防灾减灾工作,就防震减灾做出了一系列重要指示批示。中国地震局专门印发了全国地震灾害风险防范工作的通知,对进一步做好抗震救灾业务支撑指明了方向、提供了遵循。
关键词 ：
土木工程学科 土木工程学科 防灾减灾 防灾减灾
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| GB/T 7714 | 路德春 . 序言 [J]. | 北京工业大学学报 , 2021 , 47 (07) : 666 . |
| MLA | 路德春 . "序言" . | 北京工业大学学报 47 . 07 (2021) : 666 . |
| APA | 路德春 . 序言 . | 北京工业大学学报 , 2021 , 47 (07) , 666 . |
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摘要 ：
鉴于目前城市地下铁路隧道平行、交叠的情况逐年增加,且对多列车耦合荷载作用下地表振动规律尚不清楚,本文建立了大直径盾构隧道下穿双线地铁隧道三维数值分析模型,并通过现有运行列车参数建立了刚体列车模型以及实体轨道模型。采用Hertz接触模拟了运动列车轮与钢轨的接触,通过罚接触与硬接触模拟了隧道与围岩的非线性接触,利用无限元人工边界模拟了无限半空间。使用时域显式整体分析方法模拟了编组列车在隧道内的运行并与实测地表振动加速度结果进行了对比,结果表明本文建立的数值模型能够较好地反映出真实地铁列车运行时地表的振动响应。在此基础上,分析了多线隧道交汇段不同列车运行工况下地表竖向加速度的时频特性以及分布规律。
关键词 ：
交叠隧道 交叠隧道 动力响应 动力响应 平行隧道 平行隧道 时域显式整体分析方法 时域显式整体分析方法 环境振动 环境振动
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| GB/T 7714 | 路德春 , 马一丁 , 王国盛 . 近接隧道列车运行时地表振动响应数值模拟 [J]. | 吉林大学学报(地球科学版) , 2021 , 51 (05) : 1452-1462 . |
| MLA | 路德春 et al. "近接隧道列车运行时地表振动响应数值模拟" . | 吉林大学学报(地球科学版) 51 . 05 (2021) : 1452-1462 . |
| APA | 路德春 , 马一丁 , 王国盛 . 近接隧道列车运行时地表振动响应数值模拟 . | 吉林大学学报(地球科学版) , 2021 , 51 (05) , 1452-1462 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
以实际工程为背景,设计了具有单一卵石层和2个既有隧道的试验模型.基于自主研发的土压平衡盾构试验平台,开展了卵石地层盾构下穿既有马蹄形隧道和矩形隧道的模型试验.在试验过程中,记录了盾构机的施工动力和排土量,同时监测了试验模型的地表沉降,以及既有隧道的应变和作用在其上的土压力.通过盾构机施工动力和排土量的变化,分析了既有隧道对盾构施工状态的影响.利用盾构下穿过程中盾构排土量的变化,解释了既有隧道周围卵石土体发生塌落破坏的原因.基于实测的地表沉降和作用在既有隧道上土压力的变化规律,揭示了盾构下穿过程中既有隧道与卵石土体的相互作用机理.
关键词 ：
卵石地层 卵石地层 地表沉降 地表沉降 既有隧道 既有隧道 模型试验 模型试验 盾构下穿 盾构下穿 隧道变形 隧道变形
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| GB/T 7714 | 林庆涛 , 路德春 , 雷春明 et al. 下穿施工时盾构-卵石地层-既有隧道相互作用模型试验研究 [J]. | 北京工业大学学报 , 2021 , 47 (04) : 328-337 . |
| MLA | 林庆涛 et al. "下穿施工时盾构-卵石地层-既有隧道相互作用模型试验研究" . | 北京工业大学学报 47 . 04 (2021) : 328-337 . |
| APA | 林庆涛 , 路德春 , 雷春明 , 李晓强 , 苗金波 , 龚秋明 et al. 下穿施工时盾构-卵石地层-既有隧道相互作用模型试验研究 . | 北京工业大学学报 , 2021 , 47 (04) , 328-337 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
下穿施工时盾构-卵石地层-既有隧道相互作用模型试验研究
关键词 ：
卵石地层 卵石地层 地表沉降 地表沉降 既有隧道 既有隧道 模型试验 模型试验 盾构下穿 盾构下穿 隧道变形 隧道变形
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| GB/T 7714 | 路德春 , 雷春明 , 李晓强 et al. 下穿施工时盾构-卵石地层-既有隧道相互作用模型试验研究 [J]. | 路德春 , 2021 , 47 (4) : 328-337 . |
| MLA | 路德春 et al. "下穿施工时盾构-卵石地层-既有隧道相互作用模型试验研究" . | 路德春 47 . 4 (2021) : 328-337 . |
| APA | 路德春 , 雷春明 , 李晓强 , 苗金波 , 龚秋明 , 杜修力 et al. 下穿施工时盾构-卵石地层-既有隧道相互作用模型试验研究 . | 路德春 , 2021 , 47 (4) , 328-337 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Great efforts have been conducted to investigate the seismic performances of the arch and rectangular underground structures, however, the differences between seismic responses of these two types of underground structures, especially the vault radian influencing the seismic responses of arch structures are not clarified. This paper presents a detailed numerical investigation on the seismic responses of arch underground structures with different vault radians, and aims to illustrate the rule that vault radian affects the seismic responses of underground structures. Five arch underground structures are built for nonlinear soil-structure interaction analysis. The internal forces of the structural components of the underground structures only under gravity are discussed detailedly, and an optimum vault radian for perfect load-carrying functionality of arch underground structures is suggested. Then the structures are analyzed under seven scaled ground motions, amounting to a total of 35 dynamic calculations. The numerical results show that the vault radian can have beneficial effects on the seismic response of the arch structure, compared to the rectangular underground structures, causing the central columns to suffer smaller axial force and horizontal deformation. The conclusions provide some directive suggestions for the seismic design of the arch underground structures.
关键词 ：
static analysis static analysis optimum radian optimum radian arch underground structures arch underground structures seismic performance seismic performance vault radian vault radian
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| GB/T 7714 | Ma, Chao , Lu, Dechun , Qi, Chengzhi et al. Radian of the vault influencing the seismic performances of straight wall arch underground structures [J]. | STRUCTURAL ENGINEERING AND MECHANICS , 2021 , 78 (5) : 637-649 . |
| MLA | Ma, Chao et al. "Radian of the vault influencing the seismic performances of straight wall arch underground structures" . | STRUCTURAL ENGINEERING AND MECHANICS 78 . 5 (2021) : 637-649 . |
| APA | Ma, Chao , Lu, Dechun , Qi, Chengzhi , Du, Xiuli . Radian of the vault influencing the seismic performances of straight wall arch underground structures . | STRUCTURAL ENGINEERING AND MECHANICS , 2021 , 78 (5) , 637-649 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The significant influence of transverse isotropy on mechanical behaviours of soil has long been recognised, but it is still difficult to capture well under 3D stress conditions. In this study, a method of establishing 3D non-orthogonal elastoplastic (NOEP) constitutive models for transversely isotropic soil (TI-soil) is proposed. The effect of transverse isotropy is considered by extending the characteristic stress with the fabric tensor of TI-soil. The extended characteristic stress can be used to treat the mechanical behaviour of TI-soil from the perspective of isotropic soil. Therefore, a unified strength criterion for TI-soil is developed in the same form as the Drucker-Prager criterion. In order to reflect the non-orthogonality of the plastic flow direction with respect to the yield surface, the non-orthogonal plastic flow rule is adopted, which obviates the tedious work of constructing the plastic potential function or the dilatancy relation. Based on the yield function and hardening parameter expressed in the extended characteristic stress space, specific formulations of the NOEP model for TI-soil can be derived. Comparisons between model predictions and test results show that the developed model can well reflect the effects of transverse isotropy and intermediate principal stress on the strength and deformation behaviour of TI-soil.
关键词 ：
Non-orthogonal plastic flow rule Non-orthogonal plastic flow rule Characteristic stress Characteristic stress Transverse isotropy Transverse isotropy Constitutive model Constitutive model Soil Soil
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| GB/T 7714 | Liang, Jingyu , Lu, Dechun , Du, Xiuli et al. A 3D non-orthogonal elastoplastic constitutive model for transversely isotropic soil [J]. | ACTA GEOTECHNICA , 2021 , 17 (1) : 19-36 . |
| MLA | Liang, Jingyu et al. "A 3D non-orthogonal elastoplastic constitutive model for transversely isotropic soil" . | ACTA GEOTECHNICA 17 . 1 (2021) : 19-36 . |
| APA | Liang, Jingyu , Lu, Dechun , Du, Xiuli , Ma, Chao , Gao, Zhiwei , Han, Jiayue . A 3D non-orthogonal elastoplastic constitutive model for transversely isotropic soil . | ACTA GEOTECHNICA , 2021 , 17 (1) , 19-36 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Critical burial depth plays an important role in tunnel design and analysis. So, the division method for deep tunnels and shallow tunnels is perceived as a main concern. Considering the soil stress path dependency, this paper investigates the construction mechanical behavior of soil mass at different burial depths, and aims to explore a method for identifying critical burial depth. Firstly, using the Eulerian method and stress return mapping scheme, an elastoplastic algorithm applicable to double loading criteria was developed for a soil constitutive model considering complex stress paths. Then, the developed algorithm was implemented into a user-defined material subroutine (UMAT) and validated through numerical triaxial tests under different stress paths. Subsequently, the UMAT was used to model tunnel excavation in soils. The simulated results were compared with the results that from practical engineering, which shows that the UMAT could accurately predict the ground surface settlement. On the basis of this, the stress distribution and deformation performance in soil during tunneling at different burial depths were explored. Finally, the division method for differentiating shallow tunnels and deep tunnels in soil was discussed and a method for determining the critical depth was proposed.
关键词 ：
Stress path dependency Stress path dependency Tunnel excavation Tunnel excavation Deformation performance Deformation performance Stress return mapping scheme Stress return mapping scheme Critical burial depth Critical burial depth
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| GB/T 7714 | Zhang, Pei , Lu, Dechun , Du, Xiuli et al. A division method for shallow tunnels and deep tunnels considering soil stress path dependency [J]. | COMPUTERS AND GEOTECHNICS , 2021 , 135 . |
| MLA | Zhang, Pei et al. "A division method for shallow tunnels and deep tunnels considering soil stress path dependency" . | COMPUTERS AND GEOTECHNICS 135 (2021) . |
| APA | Zhang, Pei , Lu, Dechun , Du, Xiuli , Qi, Jilin . A division method for shallow tunnels and deep tunnels considering soil stress path dependency . | COMPUTERS AND GEOTECHNICS , 2021 , 135 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The excavation disturbed zone plays an important role in the evaluation of tunnel stability. The identification of the excavation disturbed zone is perceived as a main concern. Taking the material meso-structure into account, this paper investigates the construction mechanical behavior in heterogeneous sand cobble stratum and aims to precisely predict the excavation disturbed zone. Firstly, the meso-scale numerical models were used to simulate tunnel excavation in sandy cobble strata, in which the large-sized rock blocks and fine-grained soil matrix were treated as separate constituents. Then, the stress redistribution and deformation performance in the ground during tunneling were explored in detail. Subsequently, combined with the deformation performance characteristics, a method for identifying the excavation disturbed zone was proposed. The boundary of the excavation disturbed zone can be identified by the displacement mutation point of the monitoring paths. Finally, a parametric study was performed to understand the influence of key factors on the excavation disturbed zone, including the rock meso-structure parameters, the soil matrix properties, and the tunnel geometry characteristics. The simulation results indicate that both the rock content and rock size have a significant impact on the excavation disturbed zone, the strength parameters and lateral pressure coefficient have a marked effect, and the tunnel radius and tunnel burial depth have a negligible influence on the excavation disturbed zone under the given conditions when normalized.
关键词 ：
Excavation disturbed zone Excavation disturbed zone Heterogeneity Heterogeneity Material meso-structure Material meso-structure Mesoscale numerical method Mesoscale numerical method Sandy cobble stratum Sandy cobble stratum
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| GB/T 7714 | Zhang, Pei , Du, Xiuli , Lu, Dechun et al. Study on the excavation disturbed zone during tunneling in sandy cobble stratum considering the material meso-structure [J]. | TRANSPORTATION GEOTECHNICS , 2021 , 29 . |
| MLA | Zhang, Pei et al. "Study on the excavation disturbed zone during tunneling in sandy cobble stratum considering the material meso-structure" . | TRANSPORTATION GEOTECHNICS 29 (2021) . |
| APA | Zhang, Pei , Du, Xiuli , Lu, Dechun , Jin, Liu , Qi, Jilin . Study on the excavation disturbed zone during tunneling in sandy cobble stratum considering the material meso-structure . | TRANSPORTATION GEOTECHNICS , 2021 , 29 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
为了建立颗粒材料的组构张量与应力张量的定量关系,采用离散单元法,开展了一系列等应力比双轴压缩试验.模拟结果表明,随着应力的增加,颗粒间的接触法向朝着大主应力的方向集中,试样的各向异性程度逐渐提高.当应力足够大时,由接触法向定义的组构张量将不再发生演化,对应的第二偏不变量与应力比大致呈二次函数关系.进一步,将组构张量与应力张量按照某种形式相乘,得到的组合张量是与应力比无关的常量,这表明组构张量与应力张量的关系可以用一个隐式方程来描述.从而在特定条件,即圆形颗粒材料在等应力比加载下颗粒排列达到稳定时,确定了宏细观物理量之间的定量关系,为建立多尺度的本构模型提供一种潜在思路.
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| GB/T 7714 | 路德春 , 张世浩 , 田雨 et al. 等应力比加载下颗粒材料的宏细观定量关系探讨 [J]. | 北京工业大学学报 , 2021 , 47 (7) : 728-735 . |
| MLA | 路德春 et al. "等应力比加载下颗粒材料的宏细观定量关系探讨" . | 北京工业大学学报 47 . 7 (2021) : 728-735 . |
| APA | 路德春 , 张世浩 , 田雨 , 杜修力 . 等应力比加载下颗粒材料的宏细观定量关系探讨 . | 北京工业大学学报 , 2021 , 47 (7) , 728-735 . |
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