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关键词

沉降 9

DX桩 8

承载力 4

决策支持系统 3

创造力支持系统 2

数值分析 2

最小二乘支持向量机 2

氧化铈 2

BRT专用道 1

CD44 1

DX旋挖挤扩灌注桩 1

Pd局域环境 1

三峡升船机 1

下穿 1

专利分析 1

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二氧化碳 1

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Predicting the response of continuous RC deep beams under varying levels of differential settlement

M. Z. NASER, R. A. HAWILEH

《结构与土木工程前沿（英文）》 2019年第13卷第3期页码 686-700 doi: 10.1007/s11709-018-0506-2

摘要： This paper investigates the effect of differential support settlement on shear strength and behavior of continuous reinforced concrete (RC) deep beams. A total of twenty three-dimensional nonlinear finite element models were developed taking into account various constitutive laws for concrete material in compression (crushing) and tension (cracking), steel plasticity (i.e., yielding and strain hardening), bond-slip at the concrete and steel reinforcement interface as well as unique behavior of spring-like support elements. These models are first validated by comparing numerical predictions in terms of load-deflection response, crack propagation, reaction distribution, and failure mode against that of measured experimental data reported in literature. Once the developed models were successfully validated, a parametric study was designed and performed. This parametric study examined number of critical parameters such as ratio and spacing of the longitudinal and vertical reinforcement, compressive and tensile strength of concrete, as well as degree (stiffness) and location of support stiffness to induce varying levels of differential settlement. This study also aims at presenting a numerical approach using finite element simulation, supplemented with coherent assumptions, such that engineers, practitioners, and researchers can carry out simple, but yet effective and realistic analysis of RC structural members undergoing differential settlements due to variety of load actions.

关键词： concrete continuous beams deep beams finite element modeling support settlement

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Prediction of shield tunneling-induced ground settlement using machine learning techniques

Renpeng CHEN, Pin ZHANG, Huaina WU, Zhiteng WANG, Zhiquan ZHONG

《结构与土木工程前沿（英文）》 2019年第13卷第6期页码 1363-1378 doi: 10.1007/s11709-019-0561-3

摘要： Predicting the tunneling-induced maximum ground surface settlement is a complex problem since the settlement depends on plenty of intrinsic and extrinsic factors. This study investigates the efficiency and feasibility of six machine learning (ML) algorithms, namely, back-propagation neural network, wavelet neural network, general regression neural network (GRNN), extreme learning machine, support vector machine and random forest (RF), to predict tunneling-induced settlement. Field data sets including geological conditions, shield operational parameters, and tunnel geometry collected from four sections of tunnel with a total of 3.93 km are used to build models. Three indicators, mean absolute error, root mean absolute error, and coefficient of determination the ( ) are used to demonstrate the performance of each computational model. The results indicated that ML algorithms have great potential to predict tunneling-induced settlement, compared with the traditional multivariate linear regression method. GRNN and RF algorithms show the best performance among six ML algorithms, which accurately recognize the evolution of tunneling-induced settlement. The correlation between the input variables and settlement is also investigated by Pearson correlation coefficient.

关键词： EPB shield shield tunneling settlement prediction machine learning

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Long-term settlement behavior of ground around shield tunnel due to leakage of water in soft deposit

Huaina WU, Yeshuang XU, Shui-long SHEN, Jin-chun CHAI

《结构与土木工程前沿（英文）》 2011年第5卷第2期页码 194-198 doi: 10.1007/s11709-011-0105-y

摘要： The lining of shield tunnel is usually composed of segments, in which the joints, cracks, and the grouting holes (hereafter called lining deficit) exist. During the long-term running, soils and groundwater may leak from these kinds of lining deficit. The leaking of soil and groundwater causes the long-term ground loss around tunnel and thus results in the settlement of ground surface. This paper aims to analyze the impact of the leakage of groundwater through segments on the long-term settlement of ground surface. The adopted analytical method is based on the theory of groundwater seepage by using numerical simulation. The analyzed results show that settlement of ground surface increases gradually with the increase of the leaked volume of tunnel segments. When the leaked volume was unevenly distributed, differential settlement occurred locally. Comparative analysis by changing the leaked volume was conducted. The results reveal that there is a linear relationship between settlement and leaked volume when the leaked volume was controlled within the allowable limit.

关键词： lining deficit leakage of water shield tunnel settlement soft deposit

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Reliability-based settlement analysis of embankments over soft soils reinforced with T-shaped deep cement

Chana PHUTTHANANON; Pornkasem JONGPRADIST; Daniel DIAS; Xiangfeng GUO; Pitthaya JAMSAWANG; Julien BAROTH

《结构与土木工程前沿（英文）》 2022年第16卷第5期页码 638-656 doi: 10.1007/s11709-022-0825-1

摘要： This paper presents a reliability-based settlement analysis of T-shaped deep cement mixing (TDM) pile-supported embankments over soft soils. The uncertainties of the mechanical properties of the in-situ soil, pile, and embankment, and the effect of the pile shape are considered simultaneously. The analyses are performed using Monte Carlo Simulations in combination with an adaptive Kriging (using adaptive sampling algorithm). Individual and system failure probabilities, in terms of the differential and maximum settlements (serviceability limit state (SLS) requirements), are considered. The reliability results for the embankments supported by TDM piles, with various shapes, are compared and discussed together with the results for conventional deep cement mixing pile-supported embankments with equivalent pile volumes. The influences of the inherent variabilities in the material properties (mean and coefficient of variation values) on the reliability of the piled embankments, are also investigated. This study shows that large TDM piles, particularly those with a shape factor of greater than 3, can enhance the reliability of the embankment in terms of SLS requirements, and even avoid unacceptable reliability levels caused by variability in the material properties.

关键词： T-shaped deep cement mixing piles piled embankments settlement reliability analysis soil uncertainties

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区域性沉降对高速铁路基础设施影响的研究

康高亮

《工程（英文）》 2016年第2卷第3期页码 374-379 doi: 10.1016/J.ENG.2016.03.014

摘要：

本文对高速铁路线路基础沉降及差异沉降的主要影响因素进行了分析，提出局部地下水开采是影响线路差异沉降的直接诱因。通过对不同差异沉降量下无砟轨道附加荷载及高速行车过程中车辆、轨道和桥梁动力响应的研究，初步提出了运营期线路基础差异沉降控制标准。

关键词：区域沉降差异沉降无砟轨道附加荷载车辆&ndash 轨道动力学

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DX桩单桩沉降的理论计算研究

欧阳义,陈立宏,张德华

《中国工程科学》 2012年第14卷第1期页码 74-79

摘要：

DX桩由于承力盘的存在，改变了桩的荷载传递机理，在提高承载力的同时，沉降变形也显著减小。在桩的现场试验基础上，分析了DX桩与等截面桩的桩顶荷载的分配特性，进而依据Mindlin解和Geddes解求解桩端土的附加应力，编制了相应的程序，计算结果表明在同样的荷载条件下，DX桩的沉降是等截面桩的0.55~0.80倍，并对承力盘的变化引起的DX桩的沉降变化进行了分析。

关键词： DX桩承力盘沉降附加应力

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DX桩单桩沉降分析

唐松涛,袁希雨,陈立宏

《中国工程科学》 2012年第14卷第1期页码 41-45

摘要：

DX桩作为变截面桩型的典型代表，具有与普通直孔灌注桩不同的荷载传递机理，使桩基的承载力大大提高，沉降变形显著减小。多点支承的特点使得DX桩的沉降机理变得十分复杂，计算分析困难。通过对DX单桩沉降的实例分析，对DX桩与直孔桩的沉降特性进行对比，验证了设计规程中DX桩的沉降计算公式和修正系数的可靠性。

关键词： DX桩直孔桩沉降修正系数

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山水城市——21世纪中国的人居环境

鲍世行

《中国工程科学》 2002年第4卷第9期页码 19-23

摘要：

20世纪90年代，中国掀起了一场关于21世纪社会主义中国城市发展模式的大讨论。钱学森教授提出的山水城市概念是把中国传统文化中的山水诗词、山水画和中国古典园林与现代城市建设结合起来。山水城市的核心思想是，兼顾城市生态和历史文化，兼顾现代科技和环境美学；它考虑未来城市生产、生活发展的需要；它是为中国老百姓享受的生活、工作环境。21世纪是城市的世纪，主要是发展中国家的城市化。中国已经开始进入城市化高速发展的时期，世界关注中国城市化发展的道路。这是山水城市讨论的时代背景。中华民族对山水有特殊的感情，山水意识几乎融入中华民族的遗传基因，山水文化的特色之一是综合艺术，这是山水城市的文化背景。

关键词：山水城市钱学森人居环境

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京津城际铁路桥梁沉降观测与评估技术

丁愿文

《中国工程科学》 2009年第11卷第1期页码 43-47

摘要：

以京津城际铁路工程为例，系统地介绍了无碴轨道客运专线（高速铁路）桥梁沉降观测的具体要求、方法，并提出了沉降评估的数学模型和判定条件。

关键词：京津城际铁路桥梁沉降观测评估

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舰船综合保障系统设计

祝泓,张平

《中国工程科学》 2015年第17卷第5期页码 44-50

摘要：

本文在分析国外综合保障系统的基础上，提出了适用于我国舰船的保障系统顶层设计方案，给出了系统组成、主要功能和主要技术指标，将综合保障系统划分为保障资源系统、装备综合保障管理信息系统、装备故障诊断与健康管理系统三个分系统，并对各分系统的系统功能和组成进行了阐述，为舰船装备开展综合保障系统集成和管理提供了参考。

关键词：舰船综合保障系统系统设计保障资源

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Socialized care services for the aged population: System construction and support measures

《工程管理前沿（英文）》 2023年第10卷第2期页码 339-353 doi: 10.1007/s42524-022-0208-2

摘要： Given the aging society, an increase in social demand, information- and communication technology-driven culture, and government policy support emerges to enable the development of the socialized care services system for the aged (SCSSA). The development of the SCSSA would be a significant step toward addressing China’s aging population. However, the construction of the SCSSA challenges the theories and methods of traditional elderly care service system construction. Specifically, the implementation path for such elderly care service policies is unclear, the necessary technological support is insufficient, and the mechanism for integrating intelligent information technology remains underexplored. Thus, this paper focuses on the needs of the elderly, grounded in the context of the changing elderly care service policies in China, and proposes a research paradigm that integrates system construction and support measure embedding. We then construct the original SCSSA, which includes “material + spirit + medical treatment + healthcare” and propose a method of optimization and iteration. Finally, we build the research framework of systematic support measures from the perspectives of policy reconstruction, institutional embeddedness, and technical support. Our work provides theoretical support and practical guidance for the construction and dynamic optimization of the SCSSA, thus making a significant contribution that will help China effectively cope with its aging society.

关键词： socialized care service for the elderly system construction support measure

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客运专线路基动态施工控制及沉降预测

王国体,吴吉祥,李刚,王轶昕

《中国工程科学》 2011年第13卷第3期页码 50-55

摘要：

依据合武（合肥-武汉）Ⅰ标段设置路基沉降观测的数据，提出了对高速铁路路基施工进行动态控制方程的公式形式和工后路基沉降预测的依据与具体实现，并结合典型观测数据进行分析和路基施工控制，确保路基质量、沉降、工期要求。

关键词：高速铁路客运专线路基施工施工动态控制沉降预测

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非工程因素引发的高速铁路沉降问题及其对策探讨

尤昌龙

《中国工程科学》 2014年第16卷第2期页码 106-112

摘要：

结合当前非工程因素引发的高速铁路线路沉降问题相关案例，分析了线路沉降超标产生的原因及其危害，归纳了相关问题类型，提出了解决问题的相关建议和意见，希冀有助于类似问题的解决。

关键词：高速铁路线路非工程因素非工程因素沉降

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BMP decision support system for evaluating stormwater management alternatives

Mow-Soung CHENG, Jenny X. ZHEN, Leslie SHOEMAKER,

《环境科学与工程前沿（英文）》 2009年第3卷第4期页码 453-463 doi: 10.1007/s11783-009-0153-x

摘要： Prince George’s County, Maryland, in the Washington D.C. metropolitan area has developed a best management practice decision support system (BMPDSS) to support analysis and decision making for stormwater management planning and design at both the site scale and the watershed levels. This paper presents a detailed description of the BMPDSS. A case study that demonstrates the application of the system is also included. The case study involves a Green Highway project located in a highly urbanized area within the Anacostia River watershed of the county. Several best management practices (BMP) such as bioretention, filter vegetative swale, porous paving, and landscape infiltration are proposed for reducing highway runoff and improving water quality. The BMPDSS is used to identify and evaluate various alternatives to determine the most cost-effective types and combinations of BMPs that minimize the highway runoff pollution.

关键词： best management practices decision support system low impact development geographic information system optimization

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Liquefaction prediction using support vector machine model based on cone penetration data

Pijush SAMUI

《结构与土木工程前沿（英文）》 2013年第7卷第1期页码 72-82 doi: 10.1007/s11709-013-0185-y

摘要： A support vector machine (SVM) model has been developed for the prediction of liquefaction susceptibility as a classification problem, which is an imperative task in earthquake engineering. This paper examines the potential of SVM model in prediction of liquefaction using actual field cone penetration test (CPT) data from the 1999 Chi-Chi, Taiwan earthquake. The SVM, a novel learning machine based on statistical theory, uses structural risk minimization (SRM) induction principle to minimize the error. Using cone resistance ( ) and cyclic stress ratio ( ), model has been developed for prediction of liquefaction using SVM. Further an attempt has been made to simplify the model, requiring only two parameters ( and maximum horizontal acceleration ), for prediction of liquefaction. Further, developed SVM model has been applied to different case histories available globally and the results obtained confirm the capability of SVM model. For Chi-Chi earthquake, the model predicts with accuracy of 100%, and in the case of global data, SVM model predicts with accuracy of 89%. The effect of capacity factor ( ) on number of support vector and model accuracy has also been investigated. The study shows that SVM can be used as a practical tool for prediction of liquefaction potential, based on field CPT data.

关键词： earthquake cone penetration test liquefaction support vector machine (SVM) prediction