施工技术 2013年8月下 8 CONSTRUCTION TECHNOLOGY 第42卷第16期 D0I:10.7672/8gjs2013160008 碳纤维布加固低强度空斗墙试验研究* 王卓琳,蒋利学 (上海市建筑科学研究院上海市工程结构新技术重点实验室,上海200032) [摘要]进行了2片未加固和4片碳纤维布加固的低强度空斗墙的水平低周反复荷载试验,研究了空斗墙加固前 后的破坏形态、承载能力和极限变形能力等抗震性能.试验结果表明,三斗一眠空斗墙的抗震性能优于全空斗墙 体;采用交叉形式对空斗墙进行抗震加固能取得较好加固效果.建议实际工程中采用交叉形式对空斗墙进行 抗震加固,两端粘贴竖向碳纤维布加固空斗墙的效果有待进一步研究. [关键词]加固;空斗墙;碳纤维布;荷载试验 [中图分类号]TU362 [文献标识码]A [文章编号]1002-8498(2013)16-0008-04 Experimental Study of Low Strength Cavity Walls Strengthened with CFRP Wang Zhuolin Jiang Lixue (Shanghai Key Laboratory of New Technology for Engineering Structures SRIBS Shanghai 200032 China) Abstract:Two unstrengthened low strength cavity wall and four cavity walls strengthened with CFRP were tested under low frequency cyclic horizontal load.The seismic behaviors of the walls were analyzed such as the failure mode ultimate strength and deformability and so on.The experimental results show that the sesimic behaviors of the walls with horizontal bricks are better than the all-rowlock cavity walls and the sesimic capacity of the cavity wall can be improved when it is strengthened with“X"style-pasted CFRP.It is suggested that“X"style CFRP can be pasted on the wall for seismic strengthening in the project.The strengthening effect of walls with vertical CFRP pasted on the both side of the cavity wall needs further research. Key words:strengthening;cavity wall;CFRP;load testing 国家现行《砌体结构设计规范》GB50003一2011 民等对墙体整体裂缝钢筋网加固、整体裂缝钢筋网 中已经取消了空斗墙,但在我国南方地区,特别是 加固墙体两侧浇筑扶壁柱2种加固措施的效果进 长江中下游、华东、中南等地区,仍有大...
施工技术 2012年12月下 56 CONSTRUCTION TECHNOLOGY 第41卷第379期 砂土振动液化层地质条件下钻孔施工技术 陈自明 (中铁十七局集团第二工程有限公司,陕西西安710043) [摘要]乌锡铁路黄河特大桥地处桥址位于黄河三湖河口至昭君坟段,北岸为乌拉山山前倾平原,南岸为鄂尔多斯 台地,桥址地下水位15m是振动液化层,液化层深度为2-15m 地质条件差、成孔难度大、钻孔深度深是施工面临 的主要难题,通过对钻机的选型、钻进速度的控制、钢护筒的埋设、泥浆密度的调整,解决了振动液化层桩基钻孔施 工难题,取得了一定的经验. [关键词]桥梁工程;墩:成孔;施工技术 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2012)24-0056-03 Drilling Construction Technology on Sandy Soil Vibrating Liquefaction Stratum Chen Ziming The 2nd Engineering Co.Ltd.of China Railway 17 Bureau Group Corporation Xi'an Shaanxi 710043 China) Abstract:The Yellow River Bridge in WuXi Railway is located in the Sanhukou to Zhaojun Grave Segment of the Yellow River.Its north bank is a plain in front of Wulashan Mountain the south bank is Erdos platform.The vibrating liquefaction stratum is located at 15.0m below the groundwater level and extends for 2-15m deep.Because of the poor geological condition difficulty in hole forming and large drilling depth are the main problems for the bridge construction.By selection of drilling machine control of drilling speed embedment of steel protection pipes and adjustment of mud density the construction problems were solved and experiences were obtained for other similar projects. Key words:bridges;piers;hole forming;construction 黄河特大桥地处黄河河谷、漫滩阶地区,地下48m(647×10864)m(645×10864)m 水位以下15m深度范围内的粉土、粉砂和细砂层为848m(406440)m72-32m2-24m91- 可液化地层.液化层埋深0-10m 层厚2-15m 液 32m2-24m. 化等级中等严重.此类地质桥梁施工,桥址范围 主桥孔跨布置为64m7(5)×108m64m连 15m深的振动液化层钻孔施工成孔困难,易塌孔及 续箱梁...
2015年4月下 施工技术 第44卷第8期 CONSTRUCTION TECHNOLOGY 49 D0I:10.7672/sgjs2015080049 盘锦市体育中心体育场大跨度屋盖空间 张拉索膜结构施工技术 于德国,李光军2,艾永2,王波2,郑敏丽1 (1.盘锦职业技术学院建筑工程分院,辽宁盘锦124010: 2 中国建筑第八工程局有限公司大连分公司,辽宁大连116021) [摘要]盘锦市体育中心体育场为大跨度空间张拉索膜结构屋盖体系,最大悬挑长度达41m.屋盖主索系包括内 圈环向索1道和径向索,包括144道吊索、72道脊索和72道谷索.膜面布置在环索和外围钢框架之间的环形区 域,膜面前端水平,后端与水平方向成夹角,整个膜面空间扭曲,并跨越72道脊索和72道谷索形成波浪起伏的曲 面造型.详细介绍了从膜片加工到膜结构安装、起吊、张拉的施工整个过程以及在施工中克服的关键技术.保证 了工程的质量和进度,取得了良好的社会效益. [关键词]体育场;屋盖;膜结构;张拉;施工技术 [中图分类号]TU758 [文献标识码]A [文章编号]1002-8498(2015)08-0049-04 Spatial Tensioning Membrane Structure Construction for the Large-span Roof of Panjin Sports Center Stadium Yu Deguo' Li Guangjun? Ai Yong? Wang Bo2 Zheng Minli' (1.Construction Branch Panjin Vocational and Technical College Panjin Liaoning 124010 China;2.Dalian Branch of China Construction Eighth Engineering Division Co.Ltd.Dalian Liaoning 116021 China) Abstract:The roof of Panjin Sports Center Stadium is the large-span spatial tensioning cable-membrane structure whose maximum cantilevered length is 41m.The main cable system of roof includes an inner ring cable and radial cables which include 144 sling cables 72 dorsal cables and 72 valley cables. Membrane surface disposes in the annular area between the ring cable and the peripheral of steel frame and the front of membrane surface is level the back of membrane surface with horizontal direction exist angle.The entire membrane surface spatially warps and across 72 dorsal cables and 72 valley cables to form surface modeling.This paper descr...
[关键词]钢结构;索网;张拉;有限元分析;施工技术 [中图分类号]TU391;TU758[文献标识码]A[文章编号]1002-8498(2014)14-0124-04 The TensioningFormingTechnologyof Saddle-shaped CableNet StructureforPanjinStadiumRoof
(1.Beijing Building Construction Research Instiute Co.,Ld.,Beijing100039,China; 2.Shaoxing Building Quality Safety Supervision Station,Shaoxing,Zhejiang 312000,China) Abstract:The saddle-shaped cable net structure of Panjin Stadium roof is a new structure.It has some characteristics of novel shape,large span and using less steel,etc.In this paper, the construction methods which include ground assembly,synchronous lifting and the whole tensioning forming are put forward according to the characteristics of saddle-shaped cable net structure.According to the construction methods,The key technologies of the structure tension-shaping are deeply studied which includecablelength,simulation analysisfor the whole construction proces,ground assembly technique, synchronization promotion and integral tension and monitoring technology.The monitoring results show that the configuration and the cable force are satisfied with designer after tensioning. Key words:steel structures;cable net structure; tensioning;finite element analysis; construction 1工程概况型。
2017年7月下 施工技术 第46卷第14期 CONSTRUCTION TECHNOLOGY 39 D0I:10.7672/5j52017140039 盘扣式脚手架在大跨度椭圆形弦支穹顶 结构施工中的应用 邓应平,张永坡,张宝利,王振普 (天津三建建筑工程有限公司,天津300170) [摘要]研究了弦支穹顶结构高空散装施工支撑技术.通过几种脚手架的分析对比,选中盘扣式脚手架作为支撑. 天津中医药大学新建体院馆项目屋盖施工的实际应用验证了该支撑体系在弦支弯顶结构高空散装施工的优越性. [关键词]支撑;脚手架;安装:施工技术 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2017)14-0039-03 Application of Disk Lock Scaffold in the Construction of Long-span Elliptical Suspendome Structure DENG Yingping ZHANG Yongpo ZHANG Baoli WANG Zhenpu (Tianjin Third Construction Engineering Co.Lad.Tianjin 300170 China) Abstract:The support technology of high altitude bulk construction of dome structures is studied. Through the parative analysis of several supporting frame body disk lock scaffold is selected as a support the practical application in the new stadium roof construction project of Traditional Chinese Medicine of Tianjin University proves the superiority of the supporting system of roof structure construction in high altitude bulk suspendome. Key words:supports;scaffolds;installation;construction 1工程概况 天津中医药大学新建体育馆工程是中国2017 年十三届全运会场馆之一,工程平面呈椭圆形,建 筑面积为17420m2 主体1层,局部4层,建筑高度 图1主体结构长轴剖面 Fig.1 Long-axis section of main structure 24.3m.钢屋盖为椭圆形,长轴92m 短轴73m 矢 高6.5m.上层网壳采用超大空心加肋焊接球和空 心杆件焊接而成,形式为施威德勒凯威特型网壳; 下部柔性体系由4环环拉索,5圈径向拉杆和81根 竖向撑杆组成.整个屋盖坐落在内圈26根混凝土 柱和北侧跨度为55.6m的桁架上,与外圈32根混 凝土柱采用竖向异形平面桁架连接,柱顶预埋弹簧 图2整体效果 支座,柱身留有预埋件.网壳与异形平面桁架,异 Fig.2 Overall effect 形平面桁架与弹簧支座、预埋件焊接,形成稳定体 2钢屋盖施工方法确定 系.如图1所示. 由于网壳拼装完成后需要进行预应力张拉,张 体育馆中心为比赛场地,四周为阶梯观赛看 拉过程中网壳会经过复杂的力变状态,某些杆件会 台...
施工技术 2015年12月上 98 CONSTRUCTION TECHNOLOGY 第44卷第23期 D0I:10.7672/sgjs2015230098 盘扣式支撑架在大型电子厂房中的应用 王志伟,孙江龙,王连峰 (中国建筑一局(集团)有限公司,北京100161) [摘要]承插型盘扣式钢管支撑架是一种高强、质量小、标准化、装配化、多功能的新型架体.结合某大型电子厂房 特征重点介绍了盘扣式支撑架搭设技术,并对盘扣式支撑架与传统式支撑架做出了对比.工程实践表明,盘扣式 钢管支撑架在本项目取得了良好的工期、经济、安全效益,为结构按时移交提供了有力保障. [关键词]电子厂房;支撑;盘扣式支撑架;施工技术 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2015)23-0098-03 Application of Plate Type Support in a Large Scale Electronic Workshop Wang Zhiwei Sun Jianglong Wang Lianfeng (China Construction First Building Group)Co.Ltd.Beijing 100161 China) Abstract:The socket plate type steel pipe support has characteristics of high strength light weight standardization assembly and multi-function.Based on the characteristics of a large scale electronic workshop this paper introduces supporting technology of plate type support pares plate type support with traditional support.Engineering practice shows that using plate type support can shorten construction period save the cost improve security provides the powerful guarantee for the project handover on time. Key words:electronic workshop;supports;plate type supports;construction 0引言 从20世纪80年代改革开始开始,伴随经济的 飞速发展,我国涌现出大量的现代化、大体量、智能 化建筑,传统的支撑架已不能满足此种建筑的安全 及快速施工要求,因此大力开发及推广应用新型支 撑架已成为建筑业的当务之急,实践证明,采用新 图11号陈列厂房构造 型支撑架不仅施工安全可靠,装拆速度快,而且脚 Fig.1 No.1 display workshop structure 手架用钢量可减少33%,装拆工效提高2倍以上, 施工成本可明显下降,施工现场文明、整洁. 1工程概况 京东方重庆第8.5代新型半导体显示器件及系 统项目总建筑面积100.6万m2 其中1号陈列厂房 建筑面积26.22万m2 1 3层为格构梁,2层为高大 支持区 段心区 办公区 梁板,屋面为钢结构.盘扣式支撑架主要搭设范围 为1号楼核心区1 2层高大梁板,搭设体...
施工技术 2013年6月下 48 CONSTRUCTION TECHNOLOGY 第42卷第12期 D0I:10.7672/sgjs2013120048 特殊地质条件下导流隧洞堵头封堵技术 周冠荣,金薇,吴栋 (武警水电第二总队第五支队,江苏常州213135) [摘要]导流隧洞的封堵施工是水利枢纽工程下闸蓄水后需立即实施的最后一个关键施工项目,其封堵的成功与 否及效果好坏直接关系到水电站坝前库区的蓄水速度及厂房机组的发电出力大小.长潭河水利水电枢纽工程导 流隧洞永久混凝土堵头在洞内渗水严重、岩体较差等特殊地质条件下成功实施封堵并达到了预期效果,取得了良 好的经济效益和社会效益. [关键词]隧洞;渗漏;排水;封堵 [中图分类号]TV551 [文献标识码]A [文章编号]1002-8498(2013)12-0048-03 Plugging Technology for Diversion Tunnel Under Special Geological Condition Zhou Guanrong Jin Wei Wu Dong No.5 Detachment No.2 Hydropower Force of Armed Police Changzhou Jiangsu 213315 China) Abstract:Plugging Technology for diversion tunnel is the last key construction projects need to be immediately implemented after water storage in the water hydro-junction project.The plugging result is directly related to the power station dam reservoir water storage rate and plant power output size.In Changtan River hydro-junction project the diversion tunnel is plugged successfully under the special geological conditions of bad rock strength and severe water leakage in the tunnel which gain good social benefit and economic benefit. Key words:tunnels;leakage;drainage;plugging 1工程概况 采用混凝土堵头永久封堵.永久堵头设计桩号0 长潭河水利水电枢纽工程总装机容量为2× 116.65一0131.65,总长15m 呈瓶塞状,采用 40MW.施工期采用过水围堰一次性拦断河床截C20W8低热微膨胀混凝土,底部高程86.49m 顶部 流、隧洞导流的方式.导流隧洞为V级临时建筑高程100.81m.堵头下游9m段在中间设拱形灌浆 物,布置于大坝左岸,洞身全长247.0m 过流断面尺廊道,混凝土堵头浇筑完成达到一定强度后,在廊 寸为10m×12m 城门洞形,顶拱中心角120°.导流道内对堵头四周进行固结灌浆,并在堵头混凝土与 隧洞进口底板高程89.00m 出口底板高程87.00m; 原衬砌混凝土顶拱之间进行回填灌浆. 周围岩性为P青灰色、灰黑色含燧石条带灰岩夹泥2现场实地勘察情况 灰岩,弱~微...
2016年6月上 施工技术 第45卷第11期 CONSTRUCTION TECHNOLOGY 85 D0I:10.7672/8js2016110085 炮孔自动堵塞试验研究 高恺,徐釣2 (1.重庆大学通信工程学院,重庆400044;2.北京工业大学机械工程与应用电子技术学院,北京100124) [摘要]炮孔自动堵塞试验研究来源于生产实际的需要.根据炮孔堵塞要求以及设备需要实现的功能,完成了试 验从方案设计到详细的结构设计、试验所需要的配套设备的选型研究,同时进行了炮孔自动堵塞试验研究,达到了 预期的效果,为后续炮孔自动堵塞设备的研究提供了试验数据和设备参数. [关键词]隧道工程;爆破;炮孔自动堵塞;设备选型;试验 [中图分类号]U455.6 [文献标识码]A [文章编号]1002-8498(2016)11-0085-03 Research of Automatic Hole Blocking Experiment Gao Kai Xu Jun2 (1.College of Communication Engineering Chongging Unirersity Chongging 400044 China; 2.College of Mechanical Engineering and Applied Electronic Technology Beijing Unitersity of Technology Beijing 100124 China) Abstract:The research of the automatic hole blocking experiment es from the production practice prophase research of automatic hole blocking is put forward.The detail design which is from the platform to the structure is pleted besides equipment selection is finished according to the requirement of the plugging and functions of the equipment.The platform of the experiment is pleted as well as the automatic hole blocking experiment.Good experiment result is achieved which provides the experiment data and the equipment parameters to the automatic hole blocking. Key words:tunnels;blasting;automatic hole blocking;equipment selection;testing 0引言 1炮孔自动堵塞试验 我国现有土石方开挖爆破工程,在炮孔钻孔速 炮孔堵塞过程中,由于炮孔内已经完成炸药、 度、爆破效果和爆破质量等方面都已取得较大进雷管的装填工作,炮孔堵塞时,首先必须保证堵塞 步,部分工程已达到国际先进水平.但是爆破过程 过程中的安全性,不能因为堵塞过程引起炸药和雷 中,炮孔的堵塞问题一直存在一个误区,普遍认为 管的爆炸,也不能破坏雷管脚线;其次,堵塞过程中 “炮孔堵塞麻烦、费工费...
施工技术 2017年7月下 18 CONSTRUCTION TECHNOLOGY 第46卷第14期 D01:10.7672/gjs2017140018 溶洞发育地区地下连续墙施工技术* 常龙,诸葛仲彦,袁光辉,潘光诚,袁泉 (中国建筑第八工程局有限公司广州分公司,广东广州510670) [摘要]广州市新白广城轨2站和地铁3号线机场北站区间地下连续墙位于岩溶发育地区,见洞率高.在地下连 续墙施工前需要提前对岩溶进行处理,同时过程中克服溶洞引起的塌陷、卡钻、基岩面起伏大、砂层厚等地质条件, 通过成槽机冲击钻、严格控制泥浆密度、反循环清孔等技术,取得较好的效果. [关键词]基坑;地铁车站;地下连续墙;溶洞;施工技术 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2017)14-0018-04 Construction Technology of Diaphragm Wall in Karst Cave Development Area CHANG Long ZHUGE Zhongyan YUAN Guanghui PAN Guangcheng YUAN Quan China Construction Eighth Engineering Dirision Co.Lid.Guangzhou Branch Guangzhou Guangdong 510670 China) Abstract:The diaphragm wall of the intercity of T2 station of Xintang to Guangzhou North Railway Station via Baiyun Airport and the Airport North Station of metro line No.3 is located in the karst area of Guangzhou which meets holes frequently.Before the diaphragm wall is constructed the karst should be dealt with ahead of schedule at the same time the geological conditions such as collapse caused by karst cave sticking of drill large fluctuation of bedrock surface and thickness of sand layer are overe grooving machine impact drilling strict control of slurry gravity reverse circulation cleaning holes and other technologies are taken which achieve good effect. Key words:foundation excavation;subway station;diaphragm wall;cave;construction 1工程概况 道基坑围护结构采用1000mm厚地下连续墙,附属 1.1工程总体概况 结构基坑围护结构采用800mm厚地下连续墙,要求 本工程为广州白云国际机场扩建工程交通中 入微风化岩≥1.5m 心及停车楼项目,包括3个单位工程:新白广城轨 1.3地铁机场南站至机场北站区间 T2站...
[关键词]巷道;支护;动压;卸压让压;锚索 [中图分类号】TU929【文献标识码】A[文章编号]1002-8498(2012)15-0079-05 Analysisof theSupportMethodforDeepRoadwithHighStress Level DynamicPressure Song Jinhu',Wei Sixiang²,Jing Hongwen”,Wang Chong”,Li Zhehao* (1.Institute of GeotechnicalEngineering,Southeast University,Nanjing,Jiangsu 210096,China; 2.No.12 Mine, Pingdingshan Coal Co.,Ld.,Pingdingshan, He'nan 467044,China; 3.State Key Labof Deep Rock and SoilMechanics and Underground Engineering,China University ofMining and Technology,Xuzhou,Jiangsu221008,China;4.Department of CivilandMaterialEngineering, He'nan University ofUrban Construction,Pingdingshan,He'nan 467044,China) Abstract:The pulley roadway and return airway of the Twelvth Mining of Pingdingshan Colliery Group Co.,Ltd. in the 31010 area are buried at more than 1 000 meters deep. And they are subjected to the dynamic pressure of the protection seam mining. By testing, they were found to be the deep roadway in soft rock with high stress level dynamic presure,for which the supporting scheme should be specially designed. The level of dynamic pressure was obtained by three-dimensional numerical calculation. And release and high strength rock bolts were used. Single columns were used locally to provide temporary support at extremely vulnerable locations. The field monitoring data shows that the pressure release method bined with the use of high strength rock bolts can successfully maintain the stability of the Key words:roadway; supports; dynamic pressure; pressure release; anchoring c...
施工技术 2012年1月上 48 CONSTRUCTION TECHNOLOGY 第41卷第356期 深水嵌岩桩埋钻处理新工艺 徐涛 (中建市政建设有限公司,北京100161) [摘要]通过对洛湛铁路长塘埠湘江特大桥桩基埋钻处理过程分析,介绍了吹砂法处理深水嵌岩桩基埋钻过程中 的构思及原理.通过方案比选,采用潜水员配合空压机抽出孔中碎石的方法打捞钻锤,保证了钻锤完好且护筒周 围也无碎石进人护筒内.桩体质量检测结果表明,该方法操作方便、设备简易、经济合理. [关键词]桥梁工程;柱基础;嵌岩桩;埋钻;吹砂法;施工技术 [中图分类号]TU753.3 [文献标识码]A[文章编号]1002-8498(2012)01-0048-02 New Treatment Technology of Drill Buried in Rock-socketed Pile Costruction Xu Tao China Construction Municipal Construction Co.Ltd.Bejing 100161 China) Abstract:Based on analysis of the buried pile drilling process of Changtang port Xiangjiang River bridge in Luoyang to Zhanjiang railway the author describes the ideas and principles of the blowing sand method adopted in buried deep rock-pile drilling process.According to parison the method by using pressor to extract gravel with the help of drivers is adopted which ensures the drill well.Test result shows that the method is convenient and economic. Key words:bridges;piles;rock-socketed piles;drill buried;blowing sand method;construction 1工程概况 下水水质对混凝土均无侵蚀性. 长塘埠湘江特大桥位于洛湛铁路湖南永州至3施工情况 广西洪唐段湘江河道上游,桥梁全场588m 主桥为3.1埋设护筒及钻孔方案的确定 36m2×56m36m4跨预应力混凝土变截面连续 1)河床面常年受河水冲刷,局部主河底覆盖有 梁.基础为钻孔灌注桩,桩径为1.5m 13~15号墩 小量砂卵石外,其他部位均为光滑的整体岩石,河 位于主河道中,水深8~12m 水流平缓,流量较大, 底高低不平,落差较大,护筒无法直接下到河床面 河床底覆盖一层薄薄的砂卵石.每个承台下设计 以下.根据现场实际情况,先采用1.8m冲击钻在 为6根嵌岩桩,桩基嵌岩深度为18~20m 采用冲击 桩基部位进行冲击找平护筒底面,确保钻进河底深 钻成孔. 度≥50cm. 2工程地质条件 2)护筒采用钢板现场制作,内径为1.8m.中心 桥梁区属丘间河谷阶地地貌,地形起伏小,江 偏差≤50mm 倾斜度≤1%.护筒顶与施工平台顶 北岸为堆积岸,阶地发育,发育有I Ⅱ级阶地,阶地 面平齐,护筒底深入河底岩石50cm 即护简底下到 平缓开阔;15号墩为冲刷岸...
施工技术 2017年7月上 72 CONSTRUCTION TECHNOLOGY 第46卷第13期 D0I:10.7672/8js2017130072 深大基坑咬合桩支护结构数值模拟研究 陈秀辉1 2 (1.福建省建筑科学研究院,福建福州350025;2.福建省绿色建筑技术重点实验室,福建福州350025) [摘要]以襄阳新天地基坑工程为对象,采用有限元分析软件ABAQUS对该基坑支护结构的变形过程进行数值模 拟,并与监测结果进行对比分析,得出模型建立是合理可行的.采用所建立的模型讨论了桩长、桩径、错索预应力 的设置对基坑变形的影响,并得出了规律性的结论. [关键词]深基坑;支护;桩;钻孔咬合桩;数值模拟;变形 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2017)13-0072-05 Numerical Simulation of Secant Pile Support Structure in Deep Foundation Excavation CHEN Xiuhui.2 (1.Fujian Academy of Building Research Fuzhou Fujian 350025 China;2.Key Laboratory of Fujian Green Building Technology Fuzhou Fujian 350025 China) Abstract:This paper used ABAQUS finite element analysis software to simulate deformation of a foundation excavation in Xiangyang.Compared with the monitoring data the model establish is reasonable and feasible.The pile length pile diameter and the prestressed anchor cable effect on the deformation were diseussed and the regularity conclusion was obtained. Key words:deep foundation excavation;supports;piles;secant pile;simulation;deformation 1工程概况 62.330m.各土层中粉质黏土与粉土透水性弱,粉 襄阳新天地项目位于襄阳市樊城区解放路一砂与圆砾具有强透水性,泥岩为隔水层.所以本工 桥桥头东北方位,占地面积5万m2 地上总建筑面程必须考虑地下水对基坑开挖的影响. 积17.1万m2 地下总建筑面积2万m2.共布设63施工工艺及协调变形 幢高层建筑物(其中4幢45层,2幢42层),6幢多 3.1施工工艺 层建筑物(商铺及幼儿园).高层建筑物下设3层 施工中一般采用全套管钻机进行施工,这种基 整体地下室,基础埋置深度为14.0m 采用桩筏基 坑围护结构的特点就是桩与桩之间形成相互咬合 础,基础桩采用旋挖成孔钻孔灌注桩. 排列形式.该工程咬合桩由钢筋混凝土桩(A桩) 2工程地质条件 和素混凝土桩(B桩)组成,A B桩间隔布设,一般 场地地面标高66.010~70.230m 相对高差约 先施作素混凝土桩后施作钢筋混凝土桩,B桩中的 4.12m 属汉江一级阶地.根据区域资料,场区范围 混凝土在初凝之前必须有足够的时间完成A桩...
施工技术 2010年5月 50 CONSTRUCTION TECHNOLOGY 第39卷第5期 深填方区地基强夯及褥垫层施工技术 生志勇,王涛,王晓松2,张宏林',赵济生 (1.江苏中兴建设有限公司西南公司,重庆400020:2.泰兴市天润建筑安装有限公司,江苏泰兴225400) [摘要]重庆恒大城首期二标段A区小高层项目场地为超深回填土区,平均回填深度30m 最深达45m 多为垃圾 废弃材料堆填.采用强夯法加固地基,并在基础底设900mm厚垫层,将用于路桥建设的土工格栅用于建筑物地 基,形成刚柔结合的地基基础,地基承载力和不均匀沉降满足要求,取得较好的综合经济效益. [关键调]地基处理;强夯;褥垫层;筏板基础;不均匀沉降 [中图分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2010)05-0050-03 Construction Technology of Dynamic Consolidation and Cushion for Foundation in Deep Filled Area Sheng Zhiyong' Wang Tao' Wang Xiaosong? Zhang Honglin' Zhao Jisheng' (1.Sounthtoest Branch of Jiangsu Zhongzing Construction Co.Ld.Chongging 400020 China; 2.Taixing Tianrun Construction Installation Co.Ltd.Taixing Jiangsu 225400 China) Abstract:High-rise building in a area of Chongqing Hengda City bid II)locates at supper-deep filled area and it is mainly filled with 30m depth garbage (45m in maximum).Rigid and soft pounding foundation is formed by reinforcing with dynamic consolidation method setting cushion with 900mm in thickness under the foundation and adopting geotechnical grille which is monly used in road and bridge projects.It proves that the bearing capacity and differential settlement of foundation can reach requirements and good economical benefit can be gained. Key words:foundation treatment;dynamic consolidation;cushion;raft foundation;differential settlement 1工程概况 夯后标高-1~-3m的地基承载力特征值f≥ 重庆恒大城首期二标段A区小高层项目,占地面250kPa 变形模量E0≥20MPa;夯后标高-3--6m的 积67000m2 共建27栋11层小高层建筑,建筑面积地基承载力特征值f≥200kPa 变形模量E0≥15MPa; 1...
[关键词】基坑;支护结构;地下连续墙:水平位移;监测 [中图分类号】TU753【文献标识码】A【文章编号】1002-8498(2011)23-0081-04 ConstructionTechnology in theSupportingStructure withFlexible SuperpositionforDeepFoundationExcavation Yan Xiaoxin',Li Zongming',Huang Yanzheng² (1.Civil andTraffic College,North China University of Water Resources and ElectricPower, Zhengzhou,He'nan 450011, China; 2.China Construction Seenth Engineering Division.Corp.Ltd.,Zhengzhou,He'nan450004,China) Abstract:As the developing of economic, many super high-rise and high-rise buildings and underground engineerings appear continuously, leading to a much smaller distance between existed buildings and a higher cost of supporting structure. Based on underground diaphragm wall and anti-seepage curtain for deep foundation excavation,the supporting structure with flexible superposition posed of soil between them,finite element analysis software ANSYS is used to analyze and simulate the stress and deformation condition of underground diaphragm wall,several schemes are contrasted by different inner support patterns,the information is collcted in time during practical engineering construction,pared with calculation results,the boundary conditions are defined by the calculation method. Engineering practice shows that the calculation results of the stress and deformation for the structure are more coincident with practical engineerings,pared with traditional calculation method,horizontal displacement reduces 30% ,thus support cost reduces about 20%. Key words: foundation excavation; supporting structure; underground diaphragm wals; horizontal displacemen...
施工技术 2015年3月上 16 CONSTRUCTION TECHNOLOGY 第44卷第5期 D0I:10.7672/sgj82015050016 深基坑施工中塔式起重机基础选型分析* 王南 (中国建筑第六工程局有限公司,天津300451) [摘要]针对目前深基坑施工项目逐渐增多的情况,依托实际工程项目,对深基坑施工中采用的塔式起重机基础形 式进行分析,着重对格构式塔式起重机基础及钢管混凝土塔式起重机基础进行有限元仿真模拟,重点对两者的模 拟数据进行了对比研究. [关键词]建筑机械;深基坑;塔式起重机;有限元分析;施工技术 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2015)05-0016-03 Selection and Analysis of Tower Crane Foundation in Construction of Deep Foundation Excavation Project Wang Nan China Construction Sixth Engineering Bureau Co.Ltd.Tianjin 300451 China) Abstract:Based on the increasing deep foundation excavation projects it is necessary to analyze and pare different types of tower crane foundation which is mon used in practice based on actual engineering projects.Lattice type and steel tube confined concrete (STCC)type are simulated by finite element program and the parison focuses on their results. Key words:construction equipment;deep foundation excavation;tower cranes;finite element analysis;construction 0引言 力预先计算,并确定施工方法,做出既安全又经济 近年来,深基坑施工的工程日趋增多,由于设 的塔式起重机基础,本文结合某工程,以QTZ63塔 计的需求,基坑支护常会做到规划红线位置.外置 式起重机为例,分别对格构式塔式起重机基础、钢 塔式起重机往往难以满足施工对于覆盖半径的要 管混凝土桩式塔式起重机基础进行了计算,为塔式 求,但是增加塔式起重机的数量又会大大增加工程 起重机基础形式的选择等提供一定参考. 成本.传统塔式起重机基础形式不利于深基坑施 1工程概况 工,为了同时满足施工对工作半径、工期等多方面 本工程采用高承台和矩形格构式基础作为塔 的要求,出现了适用于深基坑的塔式起重机基础, 式起重机基础,在施作工程桩的过程中完成塔式起 其中包括格构式塔式起重机基础及钢管混凝土桩 重机桩施工.塔式起重机主要配合地下3道支撑、 塔式起重机基础.内置式基础加大了塔式起重机 环梁的钢筋、模板以及脚手管的水平和垂直运输, 的工作半径,减少了塔式起重机的覆盖盲区,解决 在顶板封闭后配合盖挖区土方和设备外运.为了 了上述问题. 作对比分析,本文同时对钢管混凝土桩式塔式起重 由于塔式起重机基础的施工质量直接影响上 机基础进行建模分析计算. 部...
施工技术 2012年8月下 104 CONSTRUCTION TECHNOLOGY 第41卷第371期 深基坑局部钢管降水井法兰片法封堵施工技术 王家法,宋文涛 (江苏省苏中建设集团股份有限公司临沂分公司,山东临沂276000) [摘要]结合临沂铂尔曼酒店工程,根据实际情况对降水方案进行选择,指出降水施工工艺流程,详细讲述了降水 井的设计、施工和封堵技术及其施工中的注意事项.通过临沂铂尔曼酒店深基坑局部降水井施工及封堵技术革 新,降低了地下水位、缩短了工期,满足施工要求.本施工工艺简单方便,可减少施工成本支出,并解决了深基坑降 水难题. [关键词]地下工程;深基坑;降水井;法兰片;止水环;施工技术 [中图分类号]TU753.66 [文献标识码]A [文章编号]1002-8498(2012)16-0104-03 Sealing Technology of Partial Steel Pipe Dewatering Wells with Flange Plate for Deep Foundation Excavation Wang Jiafa Song Wentao Linyi Branch of Jiangsu Suzhong Construction Group Co. Ld.Linyi Shandong 276000 China) Abstract:Combined with the actual construction condition of Linyi Pullman Hotel the dewatering schemes are chosen and the dewatering construction process is put forward.The design construction sealing and attentions of dewatering wells are described in detail.The partial dewatering wells of the foundation excavation and the innovation to deal with the sealing has successfully reduced the groundwater and shorted the construction period.The dewatering method is simple and reduce the construction cost. The dewatering difficulties of deep foundation excavation are solved. Key words:underground;deep foundation excavation;dewatering wells;flange plate;water stop ring;construction 1工程概况 水的粉质黏土含水层,原设计降水不能满足要求, 临沂铂尔曼酒店位于山东省临沂市兰山区滨在电梯井坑周围和坑中增加18口井点降水井. 河大道西侧,三河交汇处,地下水丰富,地质条件复2降水方案选择 杂.本工程主楼地下3层、地上34层、主楼总高度 针对施工中遇到的难题,原计划在电梯井坑周 143.8m;采用框架-核心筒结构,为800mm嵌岩钻 围采用止水帷幕施工,但考虑到止水帷幕施工周期 孔灌注桩加1900mm厚筏板基础.本工程为临沂 长、成本高,故取消该方案.通过计算在...
施工技术 2015年10月上 48 CONSTRUCTION TECHNOLOGY 第44卷第19期 D0I:10.7672/8js2015190048 深基坑地下连续墙护壁泥浆技术研究* 张毅,甘璐1,李红军2 (1.中国矿业大学(北京)力学与建筑工程学院,北京100083; 2.北京城建华夏基础建设工程有限公司,北京100022) [摘要]在地下连续墙槽壁开挖施工过程中往往需要采用泥浆护壁措施隔绝地下水,防止成槽过程中地下水涌入 而导致的槽壁坍塌问题.本工程采用循环泥浆隔绝层间潜水和承压水2层地下水,在保证地下连续墙槽壁稳定的 同时,防止地下水的浪费.在分析土层岩性的基础上,根据规范确定泥浆的性能及配合比,并据此提出泥浆制备、 质量控制、循环和处理工艺.泥浆在整个施工过程中的监测数据表明,设计的泥浆和与之相配套的工艺可以满足 地下连续墙槽壁稳定的要求. [关键词]地下工程;深基坑;地下连续墙;护壁泥浆;稳定性 [中图分类号]TU47 [文献标识码]A[文章编号]1002-8498(2015)19-0048-03 Research on Slurry of Diaphragm Wall of Deep Foundation Excavation Zhang Yi' Gan Lu' Li Hongjun2 (1.School of Mechanics and Ciril Engineering China Unizersity of Mining and Technology Beijing) Beijing 100083 China; 2.Huaxia Foundation Construction Engineering Co.Ltd.of Beijing Urban Construction Group Beijing 100022 China) Abstract:In the diaphragm wall tank wall excavation process it often needs to use slurry measures to isolate groundwater and prevent groundwater influx caused collapse.This project adopted circulating slurry to isolate interlayer diving and confined water and prevented the waste of underground water while ensuring the stability of diaphragm wall tank wall.On the basis of analyzing soil lithology and according to the specification this project determined the slurry performance and mixture ratio and put forward the slurry preparation quality control circulation and processing technology.Monitoring data of slurry showed that the design of slurry accorded with the matching process and could meet the requi...
2016年7月上 施工技术 第45卷第13期 CONSTRUCTION TECHNOLOGY 37 D0I:10.7672/5js2016130037 深基坑围护结构变形动态控制研究* 徐良英,许洋2,徐长节2 (1.杭州市城东新城建设投资有限公司,浙江杭州310000:2.华东交通地大学土木建筑学院,江西南昌330013) [摘要]基坑开挖过程中很多不确定因素会导致过大变形,因而围护结构应该根据实时监测数据进行调整.以某 基坑工程为例,原拟设3道水平钢筋混凝土支撑,因受工期限制,最终减为2道.根据现场信息及时调整施工 技术措施,并综合采取多种约束围护桩水平位移的措施.结果表明,这些措施可有效控制围护桩的水平位移及保 证围护结构整体的稳定性,效果显著. [关键词]地下工程;基坑;围护结构;变形;动态控制;监测 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2016)13-0037-04 Study on Dynamic Displacement Control of Retaining Structure in Deep Foundation Excavation Xu Liangying' Xu Yang2 Xu Changjie2 (1.Chengdong Xincheng Construction Investment Co.Lad.Hangzhou Zhejiang 310000 China;2.School of Ciril Engineering and Architecture East China Jiaotong Unirersity Nanchang Jiangxi 330013 China) Abstract:A lot of uncertain factors in the excavation process will lead to excessive deformation thus the design of deep foundation excavation should be adjusted dynamically according to the real-time monitoring data.This paper presents a case study on dynamic design of foundation excavation.The original design adopted three levels of reinforced concrete supports but the final design uses two layer supports for the reason of construction period.In the period of construction designers adjust construction technology timely based on feedback information from field and use a variety of restraint measures aiming at controlling the horizontal displacement of retaining piles.The result of construction shows that these measures are feasible and effective. Key wo...
2010年10月 施工技术 第39卷第10期 CONSTRUCTION TECHNOLOGY 15 深圳证券交易所营运中心钢结构施工技术 陈治,王朝阳,程鹏,叶滨 (中建钢构有限公司,广东深518040) [接要]深树证券交易所营运中心工程采用型钢混凝土结梅,其裙楼部分为巨型意铜粉架结柏,工程体量夫,施 工难点多.为解决悬挑平台的施工难题,位用了两台M1280D塔式起童机进行钢结吊梨.详细介了裙楼的颗 变形分析,裙钢结构的梨,型节点的拼技术,超愿铜板的焊接技术及砂箱卸载技术等多项关键技术,到下 了诸多工程亮点,保证了钢传构工程选工进度和工程质量. [关键词]钢传构:母结构:巨型粉架:施工技术 [中分类]TU758 [文标识移]A [文章编号]1002-8498(2010)10-0015-06 Construction Technology of Steel Structure in Shenzhen Stock Exchange Operating Center Project Chen Zhi Wang Chaoyang Cheng Peng Ye Bin (China Construction Steel Structure Co.Ltd.Shenzhen Guangdong 518040 China) Abstract:Shenzhen Stock Exchange Operating Center project is steel-reinforced concrete structure and its podium in particular is posed of giant cantilever truss which has large engineering dimension and many construction difficulties.In order to solve construction difficulties of cantilever truss two M1280D tower cranes are used to lifting steel structure.Some key technologies are introduced including deformation analysis of podium steel installation of podium assembly technology of giant joint welding technology of ultra-thick steel plate and unloading technology by sand box which ensure the construction progress and the quality of the project. Key words:steel structure:cantilever structure:giant truss:construction technology 1工程概况 2458 深创证券易所营运中心工程地下3层,地上46 层,立面外形呈“中”字形,总建筑面积约26.24万m2 其中地下室约8万m.主采用框简结构,外框采用 10F-面 型钢混凝土密柱结构,建筑高度245.8m 招升裙楼 采用全焊接箱形截面巨型钢粉架结构,节点为钢板焊 6242 接节点,裙楼东西面下方设粉架简支撑,裙楼东西母挑 -10F 36m 南北悬挑22m.巨型粉架下下表...
2010年10月 施工技术 第39卷第10期 CONSTRUCTION TECHNOLOGY 21 深圳证券交易所营运中心超厚钢板焊接技术 王朝阳,陈治,杨松,陈勇 (中建钢构有限公司,广东深州)518040) [要]深证养立易所营运中工程升裙德构为全焊接巨型悬挑铜粉架结构,粉架由巨型钢板焊接节点和 箱形截面施杆拼装而成.施工中采用,体保护半自动焊接技术,多人同步对称分段、分层多焊接方法.保 介将了巨型衔架的焊接顺序,保证了工程质量. [关键词]臣型粉架:焊顺序:得板焊接:焊接人孔 [中图分类号]TU758.162 [文献标]A [文章编号]1002-8498(2010)10-0021-03 Welding Technology of UItra-thick Steel Plate in Shenzhen Stock Exchange Operating Center Project Wang Chaoyang Chen Zhi Yang Song Chen Yong (China Construction Steel Structure Co.Ltd.Shenzhen Guangdong 518040 China) Abstract:The uplift podium of Shenzhen Stock Exchange Operations Center Engineering is a giant cantilever truss which are posed with giant welding steel plate joints and steel box section chords. The CO semi-automatic welding gas protection is used during construction.The welding method and welding sequence of giant truss are introduced which ensure the quality of the project. Key words:giant truss:welding sequence:thick plate welding:welding manhole 1工程概况 深证券交易所营运中心裙楼平面尺寸162m× 一塔楼 98m 升至36m高空,形成高空挑结构,如图1所 升裙楼 示.裙楼采用14榴空间正交巨型全焊接箱形截面钢 行察结构,采用钢板焊接节点,节点最童172,最大箱 形杆件截面尺寸4.2mx2m 场焊接量大.裙楼东画 面下方设粉架筒支撑,东西方向悬挑36m 南北方向悬 挑22m.巨型粉架下孩下表面标高36.87m 项面10层 桁架筒 标高62.42m.裙楼主粉架用钢量1.4万t 最大板 a工程效果 b裙楼整体透视 厚100mm 主要采用Q345B Q345GJB钢材,60mm厚以 图1深社养易所运营中世王程 上厚板厚度方向满足Z25的要求. Fig.I Shenzhen Stock Exchange Operating Center 2焊接施工唯点 3)焊接人孔板设置主粉智箱形截面杆件侧面开 1)厚板焊接裙棒主粉架采用铜板焊接节点和箱 设人孔,将仰焊改为平角焊.人孔尺寸设置需满足人 形截面弦杆拼装纽成,节点形式杂,板厚转大,最大 员操作和减小应力. 100mm 焊接接头为T够接头和板对接接头两种形式, 3主焊接技术 其中T形接头焊健长度最大7m.超厚钢板、超长焊缝 3.1厚板焊接...