2016年12月下施工技术 第45卷第24期CONSTRUCTION TECHNOLOGY101 DOI:10. 7672/sgjs2016240101
脚手架、支架工程安全的设计计算和施工管理要点(5)
杜荣军 (北京中建建筑科学技术研究院,北京100076) [中图分类号]TU731.2[文献标识码]A[文章编号〕1002-8498(2016)24-0101-12 Key Points of Design Calculation and Construction Management of Scaffolding and Supports(5) Du Rongjun (Bejing Building Research Institute Co.,Ltd.of CSCEC,Beijing 100076,China) 6一般的设计和荷载计算规定6.1.4扣件和托、底座的承载力 6.1一般设计规定扣件和托、底座的承载力设计值可按表12采 6.1.1钢材性能用。
当对产品的状况与使用安全有疑问时应送检, 钢材的设计值和物理性能应按表9采用。
并确定其中可使用者的承载力许用值。
6.1.2轴心受压钢管的长细比表11受弯杆构件的容许浇度[w] 轴心受压钢管的长细比不宜大于表10所示容Table 11The permissible[w]of flexural members 许值。
杆件类别脚手架支架
表9钢材的强度设计值和物理性能直接承载的纵、横向1/150,且≤10mm1/250,且≤6mm Table 9 The strength design values and水平杆,脚手板 physical properties of steel挑梁和悬挑(空)架构1/300,且≤5mm
中的受弯杆件 钢材强度设计值/(Nmm-2)弹性模量注:1为受弯杆件跨度 抗拉、抗压和抗弯抗剪E/(N-mm²²)表12扣件和底托座的承载力设计值 Q2352051202.06 ×10Table12The design value of bearing capacity of Q345300175fastener and bottom bracket 剪变模量线膨胀系数质量密度项目承载力设计值/kN C/(Nmm²2)α(以1℃计)p/(kgm-) 0.79 × 1012×1067 850对接扣件抗拉3.2
直角扣件抗滑单扣件0'8 表10受压杆件的容许长细比[A]双扣件12.0( =2 ×6.0) Table 10The permissible slenderness ratio[A]旋转扣件抗拉8.0 杆件类别容许长细比[A]固定托、底座抗压40.0 立杆脚手架200(180)6.1.5荷载及其他使用限制 横杆支撑架190(170)产品、节点和杆构配件的额定或许用荷载及其 斜杆倾斜结构的受压斜杆180 剪刀撑斜杆其他情况250他使用限制的确定应符合以下要求。
2015年9月下 施工技术 第44卷第18期 CONSTRUCTION TECHNOLOGY 23 D0I:10.7672/5js2015180023 胶粉复合改性沥青最佳制备工艺 及其溶胀时间试验研究 肖鹏,蔡冬艳,徐亚 (扬州大学建筑科学与工程学院,江苏扬州225127) [摘要]针对目前胶粉改性沥青性能存在的不足,以金陵70号道路石油沥青、中胶40目胶粉、YH-791SBS以及维 他连接剂TOR作为原材料,确定最佳制各工艺,研发胶粉复合改性沥青.主要探究胶粉与SBS两种改性剂的添加 工艺以及溶胀时间对胶粉复合改性沥青性能的影响.试验研究表明:胶粉与SBS同时掺人道路石油沥青,且溶胀 时间为I时,制备的胶粉复合改性沥青路用性能最佳,其高温稳定性能和弹性恢复性能较TOR橡胶沥青和SBS改 性沥青有显著改善. [关键词]建筑材料;沥青;胶粉;制备工艺;溶胀时间 [中图分类号]U416.217 [文献标识码]A [文章编号]1002-8498(2015)18-0023-04 The Best Preparation and Swelling Time Study of the Powder Composite Modified Asphalt Xiao Peng Cai Dongyan Xu Ya College of Ciril Science and Engineering Yangzhou University Yangzhou Jiangsu 225127 China) Abstract:Aiming at the shortage of the rubber asphalt this study selected No.70 Jinling road asphalt Zhongjiao 40 mesh powder YH-791 SBS and VITA linking agent TOR as raw material to determine the best preparation process and develop the powder posite modified asphalt.This article mainly explores the influence of the powder and SBS's adding process and swelling time on the powder posite modified asphalt performance.Experimental research shows that:when the powder is added together with SBS into the road asphalt and the swelling time is one hour the powder posite modified asphalt has the best performance.Its high temperature stability and elastic recovery performance is better than TOR rubber asphalt and SBS modified asphalt significantly. Key words:building materials;asphalt;rubber powders;preparation;swelling time 随着国内外研究的深入,废轮胎...
施工技术 2017年8月下 40 CONSTRUCTION TECHNOLOGY 第46卷第16期 D0I:10.7672/8js2017160040 聚苯乙烯模块墙体空腔简易模块化装 配式建筑应用 苏云辉,陈宁 (新疆建筑科学研究院有限责任公司,新疆乌鲁木齐830054) [摘要]根据新疆地区的气候条件和实际情况,通过模拟计算、现场检测、实地调研、理论分析等手段,对聚苯乙烯 模块墙体空腔简易模块化装配式建筑的安全性、节能性、保温性及经济性等开展研究,结合实际案例分析对比实际 效果,探讨聚苯乙烯模块墙体空腔简易模块化装配式建筑在新疆巴州富民安居房和农村住房建设中的应用前景. [关键词]装配式;聚苯乙烯空腔模块;安全性;保温:节能;经济性 [中图分类号]TU331.3 [文献标识码]A [文章编号]1002-8498(2017)16-0040-04 Application of Hollow Modular Precast Building with EPS Block Wall SU Yunhui CHEN Ning Xinjiang Research Institute of Building Sciences LLC.Urumgi Xinjiang 830054 China) Abstract:Based on climate and practice condition by simulation calculation on-site detection and investigation and theory analysis the research on safety energy-saving insulation and economic of the hollow modular precast building with EPS block wall are studied.Comparing the case analysis and practice effect application prospect of this building in Xinjiang Bazhou affordable housing and village housing is discussed. Key words:precast;EPS hollow modular;safety;insulation;energy saving;economic 0引言 1技术原理和连接方式 为提高新疆地区村镇房屋的节能标准及抗震1.1技术原理 能力,有效杜绝工程质量缺陷,规范村镇房屋的建 将EPS空腔模块经积木式错缝插接拼装成空 造行为为背景,开展了聚苯乙烯墙体空腔简易模块 腔模块墙体,在其内设置钢筋、浇筑混凝土,内外表 化装配式建筑的应用和研究,将工厂标准化生产的 面用纤维抗裂砂浆抹面层防护、耐碱玻璃纤维网格 简易装配式EPS墙体空腔模块与传统的房屋结构 布抗裂增强,形成保温承重一体化的房屋围护结 有机结合,形成聚苯乙烯模块混凝土剪力墙结构体 构,如图1所示. 系,实现保温与模板一体化以及保温与结构一体 化,做到简易装配式模块保温层与房屋结构同寿 模块外侧壁 模块内侧壁 命,从而取代传统的房屋建造黏土砖、块状组砌以 及彩钢板材料.结合实际案例,从聚苯乙烯模块墙 混凝土墙体 一抹面层 体空腔简易模块化装配式建筑的抗震性能、保温防 火性能、经济性和节能性等方面进行研究分析,验 芯肋(连接桥) 证聚苯乙烯模块墙体空腔简易模块化装配式建筑 在我区富民安居...
2015年2月上 施工技术 第44卷第3期 CONSTRUCTION TECHNOLOGY 85 D0I:10.7672/5js2015030085 聚合物超细粉体制备及改性砂浆性能研究* 邓小勇,丁凯2,王燕娜,王斌1 (1.解放军理工大学野战工程学院,江苏南京210007;2.总装工程兵科研一所,江苏无锡214035) [摘要]为开发一种新型的聚合物改性混凝土外料,配制高性能混凝土,利用在化工领域发展很活跃的超临界流 体制备超微粉体技术(其中的RESS法)制备出聚丙烯超细粉体.通过对比试验初步掌握了聚丙烯超细粉体对水 泥砂浆的改性规律,并采用微观技术分析了不同外掺料的改性机理.结果表明:聚丙烯超细粉体能体现有机聚合 物材料与无机矿物超细粉体的部分性能,可以明显改善水泥砂浆的微观结构,提高水泥基体的致密性,增强水泥砂 浆的抗折强度. [关键词]建筑材料:砂浆;聚合物超细粉体;改性 [中图分类号]TU57 [文献标识码]A [文章编号]1002-8498(2015)03-0085-04 Preparation of the Polymer Superfine Powder and Research on Modifying the Performance of Mortar Deng Xiaoyong' Ding Kai Wang Yanna' Wang Bin' (1.College of Field Engineering PLA Unirersity of Science Technology Nanjing Jiangsu 210007 China; 2.The First Engineers Scientific Research Institute of General Armaments Department Wuxi Jiangsu 214035 China) Abstract:To develop a new type of polymer modifying concrete admixture and prepare high performance concrete polypropylene superfine powder is produced by the use of the manufacture technology of superfine powder by supercritical fluid with the RESS method which develops very actively in the chemical field.By means of parative tests the law of mortar modified by polypropylene superfine powder is preliminarily grasped and the modification mechanisms of different admixtures on the mortar are analyzed with microscopic technology.The results show that polypropylene superfine powder can refleet part of the performances of the polymer material and the active mineral joined material it can imp...
施工技术 2013年1月下 86 CONSTRUCTION TECHNOLOGY 第42卷第2期 聚丙烯纤维对水泥灰土稳定砂力学性能的影响 刘恒,李锐铎 (河南城建学院交通工程系,河南平顶山467036) [摘要]针对水泥灰土稳定砂基层容易出现裂缝的现状,在水泥灰土稳定砂中入一定量的聚丙烯纤维,进行了有 关试验研究.试验表明:与未掺加的相比,掺入聚丙烯纤维对水泥灰土稳定砂的力学性能指标有极大改善.结合 实际工程,铺筑了试验路段,并对试验路段进行跟踪观测和评价分析,取得了较好的使用效果. [关键词]公路工程;水泥灰土稳定砂;聚丙烯纤维;力学性能;抗冲刷性能 [中图分类号]TU528.58 [文献标识码]A [文章编号]1002-8498(2013)02-0086-03 The Influence of Polypropylene Fiber on the Mechanical Property of Cement Lime-soil Stabilized Sand Liu Heng Li Ruiduo The Faculty of Traffic Engineering He'nan University of Urban Construction Pingdingshan He'nan 467036 China) Abstract:Cement lime-soil stabilized sand is prone to cracks.According to this situation this paper carried a series of laboratory experiments to study the effect of adding polypropylene fiber to the cement lime-soil stabilized sand.The results show that the mechanical properties of cement lime-soil stabilized sand were significantly improved with added polypropylene fiber.Combined with a practical project a pilot testing road was paved and its performance was monitored and evaluated.The testing gave a satisfying result. Key words:road construction;cement lime-soil stabilized sand;polypropylene fiber;mechanical properties;anti-erosion performance 0引言 关的技术指标:黄色,最大干密度1.88g/cm3 液限 水泥灰土稳定砂基层在我国一些地区应用广 30.0% 塑限18.2%,塑性指数11.8. 泛,该基层材料具有强度高、稳定性与板体性好的 2)砂 优点,同时也有利于就地取材.不足之处是容易出 根据本试验当地的具体情况,决定使用淮河的 现反射裂缝而造成路面早期破坏. 河砂,并对试验所用的河砂进行筛分,有关的筛分 聚丙烯纤维弹性模量低的特点使得其掺人有 数据如表1所示. 关混合料时,其中的纤维能起到加筋的效果,从而 表1砂的筛分结果 大大提高相关混合料的力学性能.本文针对聚丙 Table 1 Sc...
2017年6月上 施工技术 第46卷第11期 CONSTRUCTION TECHNOLOGY 135 D0I:10.7672/5j52017110135 联想总部(北京)园区项目二期投标方案基坑 支护优化设计分析 罗力勤 (中铁建设集团有限公司,北京100040) [摘要]以联想总部(北京)园区项目二期投标方案为例,从安全性、适用性、经济性的角度,对比分析了两种基坑支 护设计方案.其中,优化设计方案采用土钉墙结合桩锚的支护形式.优化后的方案,在保证安全性、适用性的前提 下,降低了基坑支护的造价. [关键词]基坑;支护;优化设计;桩错支护;土钉墙 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2017)11-0135-03 Optimal Design Analysis of Foundation Excavation Supporting for the Second Phase Bidding Scheme of Lenovo Headquarters(Beijing)Park Project LUO Liqin China Railway Construction Group Co.Ltd.Beijing 100040 China) Abstract:Based on the second phase bidding scheme of Lenovo Headquarters(Beijing)Park project the safety applicability and economy of two support design schemes of foundation excavation are pared and analyzed where optimal design scheme is using the support form of soil nail wall bined with pile anchor.The optimal design reduces support cost of foundation excavation which ensures safety and applicability. Key words:foundation excavation supports optimal design;pile-anchor support;soil nail wall 1工程实例 层埋深如图1所示. 1.1工程概况 46 ①杂填 联想总部(北京)园区项目二期场地位于北京 44 ②黏粉砂粉 市海淀区中关村软件园二期.拟建项目为地上3~ 6层,地下整体1~2层、局部3层的框架剪力墙结 42 ②粉黏黏粉 40.56 构,局部为纯地下室.板底标高-12.050m(局部 40 ③粉粉 -16.050m) 地表标高平均-0.600m.基坑开挖深 38 ③粉黏黏粉 度按11.45m考虑. 36 1.2地质条件 34 ③粉新粉 1)场地现状地形与地貌、地物概况地形总体 基本平坦.目前拟建场区为空地,大部分范围有 堆土. 32 ⑥细砂中砂 29.24 2)地质条件基坑开挖范围内以素填土、粉质 08 黏土、黏质粉土、砂质粉土、重粉质黏土为主,各土 26 [作者简介]罗力勤.高级工程师,E-mal:luoliqin@js cn 图1本项目典型地质剖面 [收稿日期]0场敌;[修订日期]2017-03-16 Fig.1 Typical geological section for ...
[关键词]岩体;裂隙岩体;参数折减;初始地应力场;反演 [中图分类号】TU91:[文献标识码】A[文章编号】1002-8498(2014)13-0080-04 BackAnalysisofInitial GeostressFieldConsideringParameters Reduction ofFracturedRockMess Chen Zhichao',XuYing² (1.Fujian Key Laboratory of Geohazard Prevention,Fuzhou,Fujian 350002,China; 2.Faculty of Engineering,China University of Geosciences,Wuhan,Hubei 430074,China) Abstract;The big error in fractured rock mess modeling and numerical calculation is due to the lots of plicated structural planes. Based on crack granite in underground cavem,the density,radius and others of fractures are considered to reduce the strength of fractured rock parameters in this paper.The training sample P,T are collected based on the reduced parameters mentioned above used in 3DEC.The relationship between initial ground stress field and boundary condition are obtained by BP neural network, and the value of in-situ stress field are obtained based on the measured stress values. The calculation values and the measured values are analyzed paratively. The results show that the parameter optimization method has the high accuracy in back analysis of initial ground stress field in 3DEC. In addition the huge workload and error are reduced in modeling, and it's reasonable be used widely in similar projects. Key words;rock;cracked rock; parameters reduction; initial earth stress field;back analysis 0引言 力场反演中的人工神经网络计算中,刘仲秋则将 初始地应力场对于地下洞室这类永久性地下ABAQUS运用到地应力场模型建设中"。
2015年8月上 施工技术 第44卷第15期 CONSTRUCTION TECHNOLOGY 97 D0I:10.7672/8js2015150097 考虑空间结构随机特征并基于重要性系数 的传感器优化布置方法* 屈兴涛1,丛茂林2 (1.远洋国际建设有限公司,北京100020:2.中国建筑科学研究院建筑结构研究所,北京100013) [摘要]目前的结构传感器优化布置方法主要以模态分析理论为基础,对重要构件损伤的直接监测考虑不足.以 结构的易损性理论为基础,研究空间结构的不同小损伤工况对整体结构的影响,根据广义等效刚度的概念计算各 杆件的重要性系数,以确定易损路径和重要杆件.在同时考虑实际空间结构参数随机性和荷载随机性的情况下, 建立大量随机样本并计算各样本相对应的最易损路径,统计最易损路径上的重要杆件,从而确定传感器布设 位置.将该方法拓展到随机振动分析中,对于每一动力时程,通过选取适当的计算间隔,提取动力过程中结构的时 变响应,从而获得空间结构的动力过程中的重要杆件及动力传感器布置方案.通过算例验证了该传感器布置方法 能有效监测空间结构在实际工况中的薄弱环节,及时识别结构的重要损伤. [关键词]空间结构;易损性;重要性系数;传感器;优化布置 [中图分类号]TU311.3:TU317.1 [文献标识码]A[文章编号]1002-8498(2015)15-0097-05 Optimal Sensor Placement for Space Structure Considering Randomness Based on Important Factors Qu Xingtao' Cong Maolin2 (1.Ocean Construction International Corporation Beijing 100020 China; 2.Institute of Building Structures China Academy of Building Research Beijing 100013 China) Abstract:The current methods of optimal sensor placement are major presented based on modal analysis theory with less consideration about the monitoring of the damage of ponents.The effect of different minor damage cases on the total space structure is studied based on vulnerability theory in structural analysis.The important factor of ponents is calculating according to the concept of generalized equivalent stiffness to sort out fragile ponents.For numerical simulation the random character both for structural parameters and loads is considered and the random samples are established.The fragility failure p...
[关键词]公路工程;季节冻土;路基;相变;冻融;稳定性 [中图分类号]U451.2 [文献标识码】A [文章编号]1002-8498(2013)17-0093-04 Study on Frozen-thaw Stability of Subgrade in Seasonal Frozen Soil with Phase Changing Huo Xiaolong, Chen Shougen,Wei Miaomiao,Xiao Xun (MOE Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University,Chengdu,Sichuan 610031,China) Abstract: Considering the phase-changes and influence of the global temperature rising and using the FLAC3D software of the finite difference method, this paper studies on the subgrade stability of seasonal frozen-thaw section of the second line in new Lanzhou-Urumqi Railway.Through establishing the subgrade model,selecting the suitable simulation parameters,the boundary condition,the initial condition,the methods for dealing with phase transitions and calculation,the numerical analysis of subgrade temperature field and deformation field with phase changing was carried out.Calculated result shows that phase change has a great impact on the subgrade temperature field.When frost heave occurs in the subgrade whose height is 4.2m, the relative deformation of road surface is small, and the relative deformation of road shoulder is large.There islarge heave deformation about 1mfrom the toe of roadbed, and the stability of the roadbed is affected greatly. 1工程概况 高、东北低,区内位于山丹军马场。
2016年10月下 施工技术 第45卷第20期 CONSTRUCTION TECHNOLOGY 101 D0I:10.7672/5j52016200101 考虑沉桩时效性的新旧桩变形特性与沉降分析 孙晓晨,朱杰江 (上海大学土木工程系,上海200072) [摘要]软土地区旧桩重新利用时须重新评估其承载能力,计算明确旧桩承载力与新桩承载力之间的内在联系与 差异.采用ABAQUS软件构建新旧桩共同作用的三维弹塑性有限元分析模型,研究了新旧桩共同作用效应及相应 的差异沉降,并对影响新旧桩荷载-沉桩关系的影响因素进行讨论.研究成果表明:随着长径比的增加,新旧桩的 沉降差小幅减小:随着新桩桩径的增加,新旧桩的沉降差大幅减小;随着桩距与直径比值的增加,旧桩沉降大幅 减小. [关键词]桩基;时效性;沉降;变形;数值模拟 [中图分类号]TU473.1 [文献标识码]A[文章编号]1002-8498(2016)20-0101-05 Analysis of Pile Deformation Characters and Settlement of Pile Group Including New and Old Piles Considering Pile Timeliness Sun Xiaochen Zhu Jiejiang Department of Civil Engineering Shanghai University Shanghai 200072 China) Abstract:The bearing capacity of residue pile should be reassessed and then the internal relations and differences between the new pile and the residue one should be analyzed in soft soil area.Load-settlement relationship is expected to be obtained from above research.A three dimensional elastic-plastic finite element model is established by ABAQUS old and new pile effect and the corresponding differential settlement are studied and the load influencing factors of old and new piles are discussed.Research results show that with the increase of length to diameter ratio the old and new pile settlement difference is slightly decreasing.With the increase of new pile diameter pile of old and new different settlement are substantially reduced.With the increase of pile spacing and diameter ratio the old pile settlement deereases sharply. Key words:pile foun...
2014年9月下 施工技术 第43卷第18期 CONSTRUCTION TECHNOLOGY 69 D0I:10.7672/5js2014180069 考虑掘进效应的隧道变形有限元分析* 汪彪,范亦农2,柴军瑞1 (1.西安理工大学陕西省西北早区生态水利工程重点实验室,陕西西安710048; 2.中国水利水电建设集团十五工程局有限公司,陕西西安710068) [摘要]通过数值模拟法对隧道施工全过程进行了三维弹塑性分析,尤其对不同施工条件下的隧道竖直位移变化 进行了分析.结果表明:在掘进面到达前,围岩会产生前期位移收敛,本算例前期位移量为总位移量的32.7%;隧 道变形受围岩级别、埋深及半径的影响,围岩劣化条件下的位移增量主要发生在隧道断面开挖前,半径增大条件下 的位移增量主要发生在隧道断面开挖后;V级围岩条件下,前期位移量显著增大;隧道变形稳定所需距离主要受半 径的影响,稳定距离S与半径R关系式为S=1.2R. [关键词]隧道工程:掘进效应;前期收敛;有限元分析 [中图分类号]U452 [文献标识码]A [文章编号]1002-8498(2014)18-0069-05 Finite Element Analysis of Tunnel Deformation Considering the Excavation Disturbance Wang Biao' Fan Yinong2 Chai Junrui' (1.State Key Laboratory of Eco-hydraulic Engineering in Shaanxi Xi'an University of Technology Xi'an Shaanxi 710048 China;2.Sinohydro Corporation Engineering Bureau 15 Co.Lad.Xi'an Shaanxi 710068 China Abstract:A 3D finite element analysis is conducted to simulate the conventional procedure of tunnel excavation especially the tunnels vertical displacement change when tunnel is constructed under different conditions is analyzed.The results prove that there is a preconvergence displacement ahead of the excavation face and its value account for 32.7%in the maximum displacement value in this case.For the influence of surrounding rock burying depth and radius effect the displacement caused by surrounding rock deterioration mainly occurred ahead of the exeavation face and displacement caused by the radius increasing mainly oceurred behind the face.The preconvergence displacement i...
施工技术 2016年1月上 112 CONSTRUCTION TECHNOLOGY 第45卷第1期 D0I:10.7672/sgjs2016010112 考虑外围结构存在的静止土压力计算* 秦立科,甄俊田2,戴俊1 (1.西安科技大学建筑与土木工程学院,陕西西安710054; 2.西安市政设计研究院有限公司,陕西西安710068) [摘要]以市政工程中检查井为研究对象,考虑存在周围沉井,其受到的是两者之间有限土体产生的土压力,以半 无限体为假设条件的土压力计算理论将不再适用.为计算检查井所受的土压力,沿深度方向取水平薄层作为微分 单元体,通过对作用在微分单元体上的水平力和竖向力的平衡条件分析,建立了有限静止土压力的微分方程,推导 出了有限静止土压力的理论公式,并与实测值及朗肯静止土压力进行了比较.在此基础上,分析了有限土体宽度、 土体内摩擦角、土与结构摩擦系数以及地表荷载对有限土压力的影响. [关键词]市政工程;检查井;沉井;土压力;计算 [中图分类号]TU443 [文献标识码]A [文章编号]1002-8498(2016)01-0112-04 Calculation of Earth Pressure Considering Periphery Structrue Qin Like'.Zhen Juntian2.Dai Jun' (1.College of Architecture and Civil Engineering Xi'an University of Science and Technology Xi'an Shaanxi 710054 China;2.Xi'an Municipal Engineering Design Research Institute Co.Ltd.Xi'an Shaanxi 710068 China) Abstract:The earth pressure against the inspection wells is due to the limited soils between the inspection wells and the open caisson.The earth pressure theories based on semi-infinite space assumption are not suitable for calculating the earth pressure of limited soils.The differential equations of first order are set up by considering the equilibrium of the force on the flake element taken out from the limited soils.The formula for calculating the earth pressure of limited soils is deduced and the effect of width of limited soil the friction angle friction coefficient between structure and soil and pressure are investigated. Key words:municipal engineering;inspection wells;open caisson;earth pressure;...
[关键词]隧道工程;偏压隧道;敏感性;数值模拟;支护;优化 [中图分类号】TU91[文献标识码】A[文章编号】1002-8498(2015)01-0110-05 BiasTunnelSupportingParameters Optimization Consideringthe SensitivityonEachPartofTunnel Hu Shouyun'²,Liu Xiaolei²,Chen Zhichao² (1.Faculty ofEngineering,China University of Geosciences,Wuhan,Hubei 430071,China; 2.China Railway 16th Bureau Group Co.,Ltd.,Beijing 100018,China;3.Fujian Key Laboratory of Geohazard Prevention,Fuzhou,Fujian 350002,China) Abstract:To optimize support measures targeted, the distortion sensitivity at different positions of the bias tunnel of a highway in Hubei province is studied.According to the response of the deformation and cost caused by changing the supporting structure parameters of FEM of bias tunnel, the sensitivity of the the result of analysis of sensitivity, the whole optimization measures that weaken the bolt and increase the lining thickness is put forward according to the reference index K.In addition, the anchor is also suggested to apply in asymmetric way based on the effect of supporting. According to the data of tunnel deformation monitoring, the optimized support measures based on sensitivity lead to own good effect. Key words;tunnels;bias tunnel; sensitivity; simulations; supports; optimization 0引言道的应变不对称性,如仅对单一节点的变形量进行 偏压隧道应力、应变分布形式较为复杂,因此,敏感性分析,则不能有效地反映因素对隧道整体 隧道各部分围岩对外界环境的敏感性较一般的隧,变形的贡献情况,需要进行隧道围岩多节点的分区 道复杂。
施工技术 2015年10月上 122 CONSTRUCTION TECHNOLOGY 第44卷第19期 D0I:10.7672/8js2015190122 老旧小区住宅楼综合改造技术与管理 杨志峰,徐伟,胡百根 (中国新兴建设开发总公司二公司,北京100071) [摘要]老旧住宅小区面临着不同程度的管线老化、设备年久失修、道路破损、楼体饰面脱落、节能保温效果差等诸 多需要解决的问题.某综合整治项目在外墙节能改造的同时还进行了室内专业管线、屋面、外窗等项目改造.结 合该工程的改造实例,介绍了技术创新、施工管理以及改造的经验. [关键词]改造;节能;保温;可调式空调支架;管理 [中图分类号]TU746.3 [文献标识码]A [文章编号]1002-8498(2015)19-0122-03 Technology and Management of Comprehensive Renovation of Old Residential Buildings Yang Zhifeng Xu Wei Hu Baigen (The Second Co.of China Xinxing Construction Derelopment General Co. Beijing 100071 China) Abstract:The old residential district faced with varying degrees of aging pipelines equipment disrepair damaged roads building decoration peeling thermal insulation and energy saving effect.This prehensive renovation project in exterior wall energy saving at the same time the renovation also included professional interior pipe line roof window and renovation project.Combining with the reform of the projeet this paper introduced technology innovation construction management and reform of the experience for reference. Key words:renovation;energy-saving;insulation;adjustable air-conditioning stents;management 1工程概况 2.1综合改造特点 本工程为中央国家机关投资改造的西罗园21 1)住户对改造的意愿、是否配合工程改造直接 号楼综合整治项目.该工程为单体建筑,建成于 关系到整个工程的施工策划. 1985年,总建筑面积为14580.79m2 建筑高度 2)入户改造、带户施工,扰民和民扰现象不可 68.7m.其中地上22层,地下3层.综合整治设计 规避,大量的居民协调工作尤为重要. 包括建筑节能改造、建筑内公共部位整治、建筑单 3)结合施工内容,兼顾居民生活,合理安排施 体外部整治、室内设备管线及洁具整治、室外环境 工计划. 整治、地下室及地下人防改造整治六大内容.其中 4)充分考虑气候影响,合理划分流水段,确定施 重点改造内容为外檐阳台栏板加固、外墙增加保温 工...
[关键词]老新村;墙板房;外立面;改造;板缝 [中图分类号】TU746.3 [文献标识码】A [文章编号]1002-8498(2015)22-0102-04 ConstructionTechnology of OuterFacadeRetrofitting oftheOldVillageWallPanel ShaoZhigang,Xu Yijia,Zhou Wenyun (Suzhou Lion Hill Construction &Installtion Co.,Ld.,Suzhou,Jiangsu 21500o,China) Abstract:The old village of Suzhou was mainly constructed in the 1970s and 1980s.The building area of the old village constructed before 1995s is about 3million square meters.Most of structures of the village are brick and concrete structure and wall panels. Since lack of effective management and maintenance, the facade of the village is shabby and leaking,which affect the living environment and the beauty of Suzhou.This paper mostly describes the process and quality control of the reconstruction of the facade of the village in leaking. During this restoration work and the security process,this transformation is a summary of the project. Key wordsold village;wall panels; facade;retrofitting; slab cracks 1工程概况 熟,生活便利。
2016年11月下 施工技术 第45卷第22期 CONSTRUCTION TECHNOLOGY 115 D0I:10.7672/5j52016220115 老城区复杂管网环境下基坑桩间漏水险 情分析与处理* 李结元,余群舟2,孙博文2 (1.武汉地铁集团有限公司,湖北武汉430030: 2.华中科技大学土木学院工程管理研究所,湖北武汉430074) [摘要]老城区中管网通常复杂密布,基坑施工的不确定因素大大增加,事故预防困难,因此有效的事故处理措施 以及抢险措施尤为重要.以地铁某匝道为例,详细介绍了该基坑漏水事故的险情分析、应急措施和恢复施工方案. 同时,工程监测表明险情处理及时有效.最后,总结了复杂管网环境下基坑漏水的建议. [关键词]基础;桩;漏水;复杂管网;险情分析;险情处理;工程监测 [中图分类号]TU473.2 [文献标识码]A [文章编号]1002-8498(2016)22-0115-04 Emergency Analysis and Treatments of Foundation Pit Leakage in the Circumstance of Complex Pipe Networks in Old City Li Jieyuan' Yu Qunzhou? Sun Bowen2 (1.Wuhan Metro Group Co.Lud.Wuhan Hubei 430030 China: 2.School of Civil Engineering Mechanics Huazhong University of Science Technology Wuhan Hubei 430074 China Abstract:In the old city pipe networks are usually plex which greatly increase the uncertainty of foundation pit engineering and the difficulty of accident prevention.Thus effective accident treatments and emergency measures are particularly important.A ramp in metro was illustrated in this paper to introduce the risk analysis the emergeney measures and the scheme of construction restoration of the leaking accident in foundation pit in detail.Moreover measures were proved to be effective by the engineering monitoring.At the end of the paper suggestions were summarized when foundation pit leaked in the circumstance of plex pipe networks to provide reference for similar projects. Key words:foundation;piles;leakage;plex pipe networks;risk analysis;emergency measur...
2012年6月上 施工技术 第41卷第366期 CONSTRUCTION TECHNOLOGY 41 美国AASHTO沥青路面结构设计方法及应用 李虎成 (中铁第一勤察设计院集团有限公司,映西西安710043) [摘要]沥青混凝土路面因其具有平整度好、行车平稳舒适、噪声低、易养护等特点,在国内外高速公路建设中得到 了广泛应用.由于不同国家和地区所采用的标准和规范不尽相同,西青混凝土路面结构设计的方法也有许多不同 的类型.结合特立尼达和多巴哥圣费尔南多一马亚罗高速公路沥青混凝土路面设计的实践经验,详细介绍了 AASHTO沥青混凝土路面结构设计方法的设计思路及主要设计参数的定义与取值方法. [关键词]道路工程;路面:青混凝土路面;AASHTO;设计;服务能力指数;规范 [中图分类号]TU248.6;U416.217 [文献标识码】A [文章编号]1002-8498(2012)11-0041-03 Asphalt Concrete Pavement Design Method and Its Application of AASHTO Li Hucheng China Railway First Survey and Design Institute Group Ltd.Xi'an.Shaanxi 710043.China) Abstract:Asphalt concrete pavement has been widely applied in highway construction at home and abroad with the advantages of high smoothness fortable driving experience low noise and easy maintenance and so on.There are many different methods in the design of asphalt concrete pavement structure as different standards and specifications adopted by different countries and regions.Combined with the practical experiences of asphalt concrete pavement design in Trinidad and Tobago San Fernando- Ma Yaluo highway the author emphatically introduces the design ideas the definition and determination of main design parameters of the AASHTO asphalt concrete pavement design in the USA. Key words:roads:pavements;asphalt concrete pavements;AASHTO;design;Present serviceability index:standards 1项目概况 lgN=9.361lg(SN1)-0.20 特立尼达和多巴哥圣费尔南多一马亚罗高速 APSI lg 公路是特立尼达和多巴哥国家路网规划中一条横 4.2-1.5 1094 -2.321lgE-8.07-3S 贯东西的重要高速公路,项目全长约54km 按双向 0.4...
施工技术 2011年8月下 78 CONSTRUCTION TECHNOLOGY 第40卷第347期 网状FRP增强砖砌体轴心受力性能试验研究 沙吾列提拜开依,沈祥 (新碰大学建筑工程学院,新疆乌鲁木齐830043) [摘要]提出一种新型砌体结构形式的概念和方法,通过3个试件的初步试验验证了这种新型砌体结构形式的有 效性,网状FRP增强砖砌体是对FRP材料和砌体结构合理、有效地组合.进一步分析了网状FRP增强砖砌体的工 作机理、破坏形态和作用效果.研究表明:采用建议的新型砌体结构形式,改变了试件的最终破坏模式,显著提高 了承载力. [关键词]试验;GFRP;CFRP;砖砌体 [中图分类号]TU362 [文章编号]1002-8498(2011)16-0078-03 Experiment Research on FRP Mesh Reinforced Brick Masonry Under Axial Compressive Loading SawuletBekey Shen Xiang (School of Civil Engineering Xinjiang University Urumqi Xinjiang 830043 China) Abstract:A new type of masonry structure is presented in concept and methods.The effectiveness of this new type of masonry structure is proved through the preliminary experiments of three specimens.FRP mesh reinforced brick masonry is reasonable and effective bination of FRP materials and masonry structure.Furthermore the working mechanism failure mode and effect of this kind of structure are analyzed.The result shows that the new type of masonry structure changes the specimen's ultimate failure mode and increases ultimate loading capacity significantly. Key words:test;glass fiber reinforced polymer;carbon fiber reinforced polymer;brick masonry 砌体结构具有易于就地取材,较钢筋混凝土结 通过一组网状FRP增强砖砌体轴心抗压性能对比, 构节约水泥和钢材;施工设备和方法简单,具有较好 试验,较好地展示了网状玻璃纤维(glass fiber 耐火性、化学稳定性和大气稳定性等优点.砌体结 reinforced polymer GFRP)和碳纤维(carbon fiber 构一直是我国量大面广、历史悠久的一种结构形式. reinforced polymer CFRP)增强砖砌体结构性能,提 近些年来自然灾害的频频发生、新规范的实施、原抗 出网状FRP增强砌体的概念和方法,为促进新材料 震设防区域划分的调整和房屋使用功能要求的提高 应用、结构技术发展和拓宽我国砌体结构应用前...