2017年6月上 施工技术 第46卷第11期 CONSTRUCTION TECHNOLOGY 77 D0I:10.7672/5j52017110077 基于层次分析法的浅埋大跨城市隧道扁平率优化研究 武明静 (中铁十二局集团第二工程有限公司,山西太原030032) [摘要]对浅埋大跨城市隧道而言,合理的扁平率设计对于节约成本和提高结构安全性都有至关重要的作用.依 托某典型工程,提出基于层次分析法原理的扁平率优化流程.首先对该工程的地质条件进行分层概化,确定地层 及支护的物理力学参数和备选的扁平率,建立数值模型网格,利用有限差分软件模拟5种不同扁平率下隧道地层 与支护的力学响应;再通过层次分析法对影响隧道经济性、稳定性与安全性的开挖面积、地表沉降、拱顶沉降、水平 位移、支护受力特性及塑性区面积进行优化并计算其权值,最终选出最优的扁平率. [关键词]隧道工程;扁平率:优化;层次分析法;数值模拟 [中图分类号]U445.4 [文献标识码]A [文章编号]1002-8498(2017)11-0077-05 Study on Flat Ratio Optimization of Large-span Shallow Buried City Tunnel Based on Analytic Hierarchy Process WU Mingjing The 2nd Engineering Co.Lad.of China Railway 12th Bureau Group Co.Ltd.Taiyuan Shanxi 030032 China) Abstract:The design of reasonable flat ratio for large-span shallow buried city tunnel has very important effect on cost saving and structural safety improving.Based on some typical tunnel engineering the method of evaluating stability of surrounding rock called failure degree index FDI)and the flat ratio optimization flow based on analytic hierarchy process AHP)is proposed.Firstly on the basis of the hierarchy of generalized geological conditions the physical and mechanical parameters for stratum and support structure and the alternative flat ratio are determined.With the finite difference software FLAC3D. numerical model grids are built to simulate the mechanical response between stratums and support under 5 kinds of flat ratios.Then target values of excavation area ground surface settlement vault subsidence h...
[关键词]绿色建筑;风险关联关系;社会网络分析;策略 [中图分类号]TU712[文献标识码]A[文章编号]1002-8498(2016)04-0062-04 Risksand Their CorrelationsResearchof GreenBuilding Project in Our CountryBasedonSNA Wang Lin'²,MaLi',ZhangPing (1.Faculty of Infrastructure Engineering,Dalian University ofTechnology,Dalian,Liaoning116024,China; 2.SchoolofAutomotive and Building Engineering,Beihua University,Jilin,Jilin132021,China) Abstract;Green building projects are faced with more plex risk system than general construction projects.They have plex relationships between risks,the risk correlation decides the degree of risk of the whole project. From the Social Network Analysis perspective,this article researches the risk correlationofgreen building projects,buildsariskcorrelationnetworkofthegreenbuilding projectuses Pajek software which is a socialnetwork analysis tool to calculate parameters of the risk correlation network,uses themethod of k-cores bined with social network parameters to prehensive analyze and evaluate therisk correlation of green building projects.The studyhas gota1l-cores condensation risk network of the green building project.Based on the11-cores risk network,the number of nodes of the risk network has a 53%reduction and the density of the risk network has a 49.7% growth.According to the 11-cores network,to further identify the key and primary risk which can be controlled of green building project,risk management strategies are put forward. Key words:green building;risk correlation;social network analysis(SNA);s...
2012年7月上 施工技术 第41卷第368期 CONSTRUCTION TECHNOLOCY 55 基于AHP法的冲击钻孔桩施工风险评估 蒋根谋1,孙康,代选顺2 (1.华东交通大学土木建筑学院,江西南330013:2.中交三公局第二工程有限公司,北京100089) [摘要]采用事故树分析法来辨识冲击钻孔桩施工过程中存在的风险,并用AP的方法来评价各风险事故的重要 性,为冲击钻孔桩施工的重点控制提供依据.从建立层次结构模型、构造成对比较矩阵、进行一致性检验、评价分 析事故风险性、控制风险等几个方面对冲击钻孔柱施工的风险评价进行了介绍. [关键调]桩基础;冲击钻孔桩;风险分析:事故树;层次分析法 [中图分类号]TU753.3[文献标识码]A[文章编号]1002-8498(2012)130055-03 AHP-based Risk Assessment of Impact Drilling Pile Construction Jiang Genmou'.Sun Kang' Dai Xuanshun2 (1.School of Civil Engineering East China Jiaotong Unieersity Nanchang.Jiangxi 330013 China: 2.The Second Engineering Co..Led.of CCCC THEC Bejing 100089 China) Abstract:Fault tree analysis method was adopted to identify the risks in impact drilling pile construction. AHP method was then used for evaluation of the risk levels and to provide guidance for key risk controls. The authors gave an introduction to the risk assessment of impact drilling pile covering establishment of hierarchical structure model construction of pairwise parison matrix performing consistency test risk assessment and risk control. Key words piles;impact drilling pile;risk analysis;accident tree analysis:AHP 冲击钻孔桩在桥梁基础施工中是最为常见的 风险管理 一种,根据不同的地质情况,果用配制不同的泥浆 指标,冲击钻进成孔,采取水下导管法施工灌注成 风险评估 风险控制 桩.钻孔、灌注桩基础混凝土都是水下作业,具 有隐蔽性和可视性差的特点,对其进行施工控制的 风险分析 风评价 实 难度增加,因此应该从预防的角度来减少冲击钻孔 策 桩施工成本的增加,对施工过程的风险管理就显得 险估计 尤为重要.如何系统科学地分析冲击钻孔桩施工 的风险是最为核心的问题,本文将重点解决这个 图1风险管理层次结构 问题. Fig.1 Risk management hierarchical structure 1风险管理的基本概念 2冲击钻孔桩施工的风险辨识 工程项目风险管理是人们在追求可靠和安全 如果冲击钻孔桩施工过程中出...
[关键词】岩土工程;勘寨;安全;规范 [中图分类号】TU19 【文献标识码]A [文章编号]1002-8498(2010)05-0099-05 CompilationFeatures of theNationalStandardSafetyCode forGeotechnicalEngineeringInvestigation Dai Yiming (Fujian ProincialInstiuteofArchiecuralDesignandResearch,Fuzhou,Fujan350001,China) general standard,which is applicable to all industries geotechnical engineering investigation safety. It is basis for works such as the preparation of geotechnical engineering investigation outline,hazard identification,n-site jobsafetyassessment,managementof production safety.Based npilatig experiences of Safety Code for Geotechnical Engineering Investigation,the pilation background, preparation principles, main contents and main characteristics of the standard are introduced. Key words:geotechnical engineering; investigation; safety;standard 根据中华人民共和国住房和城乡建设部《2008年多种,并开展了多项专题研究,进行了广泛的案例调 工程建设标准规范制定、修订计划(第一批)》(建标查,通过研究分析,寻找勘察生产过程中各作业程序存 [2008]102号),由福建省建筑设计研究院和福建省九在的危险源。
2016年4月下 施工技术 第45卷第8期 CONSTRUCTION TECHNOLOGY 97 D0I:10.7672/8js2016080097 加劲肋厚度对焊接球节点承载力的影响分析* 戴俊辉,苏英强2,仝书敬2,王留成2,俞福利2 (1.浙江工业职业技术学院建筑工程分院,浙江绍兴312000; 2.浙江精工钢结构集团有限公司.浙江绍兴312030) [摘要]目前加劲肋厚度对焊接空心球节点性能影响的研究不多,至今没有一部结构设计规范明确提出加劲肋厚 度对焊接球节点强度的影响大小.如何经济、安全地选取加劲肋厚度是值得思考的问题.为有效评估加劲环板厚 度对焊接球承载力的影响,运用有限元软件ABAQUS建立带肋焊接空心球节点模型,提出焊接空心球内部加劲肋 的构造壁厚取值方法,同时研究了在受压和受拉情况下,不同加劲肋厚度对焊接球承载力的影响. [关键词]钢结构;焊接球;加劲肋;承载力;影响分析 [中图分类号]TU391 [文献标识码]A [文章编号]1002-8498(2016)08-0097-06 The Analysis of Stiffener Thickness Influence on Bearing Capacity of Welded Ball Joints Dai Junhui' Su Yingqiang? Tong Shujing? Wang Liucheng2 Yu Fuli2 (1.School of Civil Engineering Zhejiang Industry Polytechnic College Shaoxing Zhejiang 312000 China; 2.Zhejiang Jinggong Steel Building Group Co.Ltd.Shaoxing Zhejiang 312030 China Abstract:At present the analysis of stiffener thickness influence on bearing capacity of welded ball joints is not so much.So far there are no any specifications of structural design specify the influence degree of stiffener thickness on bearing capacity of welded ball joints.How to select the thickness of stiffener economically and safely is a question worth considering.In order to effectively evaluate stiffener thickness influence on bearing capacity of ring stiffened rib this paper applies the finite element software ABAQUS to establish the model of ribbed welded hollow ball joints.It proposes methods to construct the thickness of welded hollow ball joints.At the same time it analyzes different stiff...
2011年8月下 施工技术 第40卷第347期 CONSTRUCTION TECHNOLOGY 关于建筑工业化问题的探讨 杨嗣信 (北京建工集团有限贵任公司,北京100045) [摘要]近年来随着我国建筑业的迅猛发展,建筑工业化得到较大发展,但与发达国家相比在某些方面仍存在较大 差距.首先讲述了我国实现建筑工业化的必要性和追切性,提出我国应该在结构装配化施工、取消或减少湿作业、 扩大工厂预制范围、设备安装工程等方面进一步发展,从而有效加速我国建筑工业化进程.最后提出建筑工业化 进程中应该采取的具体措施. [关键词]工程管理;建筑;工业化;结构装配化;湿作业;工厂预制 [中图分类号]TU741 [文献标识码]A[文章编号]1002-8498(2011)16-0001-03 Discussion on Problem of Construction Industrialization Yang Sixin Beijing Construction Engineering Group Co.Lad.Beijing 100045 China) Abstract:Recently industrialization of construction in China developed rapidly with the development of construction industrialization.But pared with developed countries the condition of industrialization in China still need to be improved.The necessary and urgency to realize industrialization of construction in China is introduced.Several measures can be used to improve the speed of industrialization such as construction with structure assembly canceling or reducing construction at wet condition expanding the precast scope at factory equipment installation etc.The concrete measures should be applied at develop of industrialization of construction are put forward finally. Key words:project management;building;industrialization;structure assembly;construction at wet condition;precast at factory 1实行建筑工业化的必要性和迫切性 国家重点工程的建设任务,大大促进了建筑业的发 我国在20世纪70年代就曾提出过建筑工业化展和提高,但同时也应清醒地看到我国的建筑业与 的概念,由于当时各方面条件不具备,发展很慢.尽发达国家相比还有一定的差距,特别是在施工管理、 管如此,30年来建筑工业化随着我国建筑业的大发施工企业体制、劳动效率、经济效益和文明施工等方 展仍然有着较大的进展,诸如施工机械化、专业化、面还需要进一步提高;另外在节能减排...