2013年1月下 施工技术 第42卷第2期 CONSTRUCTION TECHNOLOGY 95 高真空击密联合置换法处理油罐软土地基技术 蒲晓芳,楼晓明,徐士龙,贺里平 (上海港湾软地基处理工程(集团)有限公司,上海200092) [摘要]提出了高真空击密联合强夯置换处理油罐软土地基的方法,用建筑垃圾作为强夯置换料,形成置换墩,置 换墩达到下部硬土层,用高真空击密加固墩间土.通过对地基处理过程中墩间土的静力触探试验和标贯试验等检 测分析,以及地基处理后的静载荷试验检测、充水预压效果检测等,发现在该地质情况下采用该方法复合地基能满 足230kPa的使用要求. [关键词]地基;高真空击密;置换墩;承载力;强夯 [中图分类号]TU472 [文献标识码]A [文章编号]1002-8498(2013)02-0095-05 Treatment of the Soft Ground of Oil Tank with High Vacuum Densification and Replacement Pu Xiaofang Lou Xiaoming Xu Shilong He Liping Shanghai Harbor Soft Soil Treatment Engineering Co.Ld. Shanghai 200092 China) Abstract:This paper proposed a method for the treatment of the soft ground for oil tank foundation using a bination of high vacuum densification and bining dynamic replacement methods.Construction wastes were used as the replacement to form a replacement column which reached the hard soil below. High vacuum densification method was then employed to improve the soft soils between the columns.CPT and SPT tests were performed to the soil between columns during the treatment.Static loading tests were performed after the treatment.Trial tests were also performed with water fully charged in the oil tanks. The test results show that the bearing capacity of the posite foundation could satisfy the requirement of 230kPa. Key words:foundations;high vacuum densification;replacement column;bearing capacity; dynamic paction 0引言 形成的复合地基强度增长有限,主要是因为该法对 “高真空击密法”是一种快速加固软土地基的 墩间土承载力提高有限,仅靠形成的墩往往难以满 专利技术,是通过数遍的高真空,并结合数遍合...
2015年5月下 施工技术 第44卷第10期 CONSTRUCTION TECHNOLOGY 23 D0I:10.7672/sgjs2015100023 高温环境下钢管柱柱脚重力灌浆技术 李引胜,薛涛,王晓伟,行宏,石峰 (陕西建工第一建设集团有限公司,陕西西安710068) [摘要]灌浆料具有自流性好,早凝、早强、无收缩、微膨胀等诸多优点,然而在高温环境下自流性受到温度影响,流 清面迅速凝结,空气滞留于结构内部,形成空鼓最终受压开裂,难以保证工程质量.结合延长石油科研中心工程柱 脚灌浆施工过程,温控、改变工艺等措施,改善灌浆料流动性以及整个浇筑过程连贯性.最终提高柱脚灌浆质量. [关键词]高层建筑;钢管柱;重力压浆;降温;流动性 [中图分类号]TU758 [文献标识码]A [文章编号]1002-8498(2015)10-0023-02 Technology of Gravity Grouting of Steel Tubular Column Foot Under the Environment of High Temperature Li Yinsheng Xue Tao Wang Xiaowei Xing Hong Shi Feng (SCEGC No.1 Construction Engineering Group Co.Ltd.Xi'an Shaanxi 710068 China) Abstract:Grouting material has many advantages such as good gravity flow fast hard early strength no shrinkage and micro expansion etc.However due to temperature changes in gravity flow under the environment of high temperature flowing surface rapid condensation air trapped in the internal structure which forming hollowing and finally pressed to crack so it is difficult to guarantee the quality of the project.However with the measures of Yanchang Petroleum Headquarters Tower in construction process controlling the temperature using gravity and changing the process etc.to improve the grouting material flow and the whole construction process of coherence.Finally the quality of column foot grouting is improved. Key words:tall buildings;steel tubular column;gravity grouting;cooling;liquidity 1工程概况 延长石油科研中心项目工程由塔楼和裙楼两 部分组成,总建筑面积为21.7万m2.塔楼地上46 高强无收 缩灌浆料 层,地下3层,建筑高度217.30m 主体结构为钢管 工...
施工技术 2012年6月下 78 CONSTRUCTION TECHNOLOCY 第41卷第367期 高海拔地区机械化组塔施工技术 韩慧,徐聚科 (武警水电第二总队八支队,福厦门361009) [摘要]格尔木至拉萨±400kV直流联网输电路工程是西藏电网与西北电网唯一的联络通道,施工环境复杂劣, 工作量大,工期紧,组塔安全作业难以保证.结合工程实际,通过施工方案优化,确定选用机械化组塔施工技术,介 绍组塔的施工工艺及控制措施.结果表明,机械化组塔技术在高海拔地区的应用能确保工程质量和工期要求. 【关键词]高海拔地区;电路工程:组塔:机械化:施工技术 [中图分类号]TU994;TM754 【文献标识码]A[文章编号]1002-8498(2012)12-0078-03 Mechanization Pylon Erection Technology at High Altitude Area Han Hui.Xu Juke (No.8 Detachment No.2 Hydropower Feree of Armed Police Xiamen Fajian 361009 China) Abstract:Geermu to Lhasa±400 kV HVDC power transmission project is the only cross-passage to Tibet power grid and northwest power grid and it has the characteristics of plex construction environment heavy workload and tight schedule the pylon erection safety is difficult to ensure.Combined with the construction conditions the mechanization pylon erection technology is adopted by scheme selection and the construction process and control treatments of pylon erection is introduced in detail.The results show that the application of mechanization pylon erection technology ensures the construction quality and construction time requirement. Key words:high altitude area;transmission project;pylon;mechanization;construction 1工程概况 机吊装组塔、流水向前作业的新型组塔方式,减少 格尔木一拉萨±400kV直流联网输电线路工程了抱杆的使用,按照工期要求完成了高海拔地区恶 是西藏电网与西北电网唯一的联络通道,8标段线劣条件下137基大开挖基础的组塔施工任务. 路全长102.715km 路径沿线海拔范围在4480~2优化前施工方案 5300m.沿线地形以山地为主,平地主要为草原和 优化前预备采用内悬浮外拉线抱杆分解组塔, 泥沼.其中普土40%、坚土10%、松砂石25%、泥其施工工艺简单、成熟,所用工器具较为轻便、安装 水10%、岩石15%.本标段的施工环境非常恶劣,...
2016年10月上 施工技术 第45卷第19期 CONSTRUCTION TECHNOLOGY 49 D0I:10.7672/5j52016190049 高水位深基坑承压滞水合理疏导及利用技术 芦继忠1,张媛媛1 2,朱建华1 (1.广西建工集团第五建筑工程有限责任工程公司,广西柳州545001;2.桂林理工大学,广西桂林541004) [摘要]根据工程地质情况,设置承压滞水疏导系统,克服圆砾层无法锚固抗浮锚杆的施工难题,“化堵为疏”将滞 水进行合理疏导并加以回收利用,既保护了施工场地的水土资源,又使得基坑滞水得以回收利用,实现绿色施工、 节能环保的目标. [关键词]地下工程:深基坑;承压滞水;疏导;施工技术 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2016)19-0049-03 Dredging and Utilization Technology of Confined Water in Deep Foundation Excavation Lu Jizhong' Zhang Yuanyuan.2 Zhu Jianhua' (1.Guangxi Construction Engineering Group No.5 Construction Engineering Co.Ltd.Liuzhou Guangxi 545001 China; 2.Guilin University of Technology Guilin Guangxi 541004 China) Abstract:Based on engineering geological conditions confined water grooming system was set to solve the construction difficulty.This method can dredge and recycle the water which can protect the environment and realize the goal of green construction and energy saving. Key words:underground;deep foundation excavation;confined water;dredging;construction 1工程概况 输水管道 某工程位于南宁市新竹路1号,地下4层,地上 33层,总建筑面积为69394.2m2 基坑开挖深度 集水箱 25m.持力层为圆砾层,地下水位埋深21m 高于基 集水井 坑底面标高4m 为承压水,水量较大;圆砾层具有透 水系数大、岩层松散等特点,抗浮锚杆无法锚固,给 基坑施工及建筑物抗浮带来了困难. 结合多年的施工经验,决定采用“化堵为疏”的 圆砾层 滤水井滤水管 方式进行地下滞水处理,使得地下滞水得以有效疏 图1滞水疏导系统 导,并加以回收利用,同时能够保持建筑物场地生 Fig.1 Water drainage system 态环境平衡发展,有效进行水土保护,达到环境保 水有组织的疏导至集水井后再统一抽排利用,从而 护的目的. 将地下水的承压水头降低到合理区间,使基础底板 2深基坑滞水疏导系统原理 所承受的水压力处于合理范围,减轻基础底板承受 整个滞水疏导系统由滤水井、滤水管、集水井、 的水压力,防止了底板因水压力过大产生裂缝和降 输水管道、集水箱5部分组成,如图1所示. 低建筑不稳定性. 疏导系统设计及工作原理:根据地质勘察资料 滞...
2013年11月下 施工技术 第42卷第22期 CONSTRUCTION TECHNOLOGY 115 D0I:10.7672/8gjs20132200115 高水位条件下深基坑内钻孔灌注桩施工技术* 王自强,刘洪海2,丁力生2,宋承骞2,王文明1 (1.上海广联建设发展有限公司,上海200438;2.中建三局第一建设工程有限责任公司湖北武汉430040) [摘要]结合工程实际水文与地质情况,针对某超高层建筑钻孔灌注桩在高水位深基坑内施工时发生的孔壁坍塌 及混凝土缺陷情况进行了原因分析.结合分析结果,通过方案比选,采取了针对性的降水、孔口埋设长护筒、组合 多种钻孔方法成孔、加强泥浆指标和混凝土灌注过程控制等措施,确保了灌注柱的工程质量,取得了良好的效果. [关键词]桩基础;深基坑;钻孔灌注桩;降水 [中图分类号]TU753.3 [文献标识码]A[文章编号]1002-8498(2013)22-0115-04 Construction of Bored Pile in Deep Foundation Excavation Under High Water Level Wang Ziqiang' Liu Honghai? Ding Lisheng? Song Chengqian2 Wang Wenming' (1.Shanghai Guanglian Construction and Development Co.Ltd.Shanghai 200438 China; 2.The First Construction Engineering Limited Company of China Construction Third Engineering Bureau Wuhan Hubei 430040 China) Abstract:Combined with actual hydrogeology conditions the reason of bored pile construction quality problems in high water level and in deep foundation excavation are analyzed.Based on the analysis results and scheme selection the pertinence construction treatments are adopted including dewatering pre-burying long guard barrel bination drilling methods and strengthening process control the quality of bored pile is ensured and the good effect is obtained. Key words:piles;deep foundation excavation;bored piles;dewatering 1工程概况 填土、淤泥(局部为淤泥质砂)、粉质黏土已挖除,开 某超高层建筑位于深圳市南山区,场地原始地 挖面以下地层主要为砾质粉质黏土和风化花岗岩. 貌单元为滨海滩涂,后经填海造地成为待建用地. 1)砾质粉质黏土由粗粒花岗岩风化残积而 共设计2栋塔楼,主楼为地上56层,建筑总高度约 成,不均匀含石英砂砾6.0%~47.3%,可塑~硬 240m;附楼为地上33层,建筑总高度约150m.裙 塑,层厚4.30~...
2016年4月下 施工技术 第45卷第8期 CONSTRUCTION TECHNOLOGY 123 D0I:10.7672/8js2016080123 高效低耗水平模架支撑体系承载力研究* 李证吉,袁新和 (中建四局第五建筑工程有限公司,贵州贵阳550003) [摘要]高效低耗水平模板脚手架支撑体系以实现快拆快支、一键连、无零部件施工为特点,同时具有早拆功能,与 塑料工字背楞和塑料模板配合使用实现模板脚手架施工高效低耗的效果.根据足尺试验得到的相关试验数据确 定架体整体刚度,并建立有限元模型,脚手架节点采用半刚性方式.得到了在相关荷载规范框架内的最佳纵跨距、 横跨距及步距组合,为该架体推广使用提供了理论支撑.考虑有无剪刀撑2种失稳模式,并探究该架体在这2种 失稳模式情况下的安全使用高度.研究成果为高效低耗水平模架支撑体系技术规程修订提供理论基础. [关键词]模板:脚手架;高效低耗:支撑;承载力;有限元分析 [中图分类号]TU312 [文献标识码]A [文章编号]1002-8498(2016)08-0123-04 The Bearing Capacity Research on Horizontal Formwork Support System with High Efficiency and Low Energy Consumption Li Zhengji Yuan Xinhe CCFED the Fifth Construction Engineering Co.Guiyang Guizhou 550003 China) Abstract:The horizontal formwork support system with high efficiency and low energy consumption has characteristics of quick and fast branch one key connection and no ponent construction and has early dismantling function which cooperates with plastic back ridge and plastic formwork.Experimental data obtained from the full-scale experiments can determine the overall stiffness of the frame body and finite element model is used and the scaffold joint applies semi-rigid approach.It obtains the best longitudinal span transverse span and step within the relevant load specification.Considering bearing capacity with or without X-bracing of two unstable modes it explores the safe use height in both cases in order to supply theoretical basis for the code revising of horizontal formwork support system with high efficienc...
施工技术 2016年2月下 86 CONSTRUCTION TECHNOLOGY 第45卷第4期 D0I:10.7672/8gis2016040086 高强玻纤岩棉防火保温板弧形屋面施工技术 徐奎学,郭收田,毛倩倩 (中启胶建集团有限公司,山东青岛266300) [摘要]高强玻纤岩棉防火保温板具有绿色环保、应用广泛、抗震性好、耐候性能好、保温、隔热、隔声、防水性能、板 体轻薄的特点,综合成套施工技术,应用于弧形网架屋面,丰富了建筑屋面的外观,同时满足了屋面保温、隔热等功 能.从工艺流程、檩条安装、屋面板安装、屋面有关节点做法及质量控制要点介绍了高强玻纤岩棉防火保温板施工 技术. [关键词]高强玻纤岩棉;抗震;保温;装配式;擦条;屋面板;节点 [中图分类号]TU765 [文献标识码]A [文章编号]1002-8498(2016)04-0086-03 Construction Technology of Arc Roof with High Strength Fiberglass Rockwool Fireproof Insulation Board Xu Kuixue Guo Shoutian Mao Qianqian (Zhonggi Jiaojian Group Co.Lid.Qingdao Shandong 266300 China) Abstract:The high strength fiberglass rockwool fireproof insulation board have characteristics of environmental protection extensive application good earthquake resistance good weather resistance insulation sound insulation waterproof light.Comprehensive construction technology is applied to the roof of curved grid which enrich the appearance of building roof at the same time meet the roof insulation heat insulation and other functions.This paper introduces the high strength fiberglass rockwool fireproof insulation board construction technology from the aspects of technological process purlin installation roof panel mounting roof related joints practices and quality control points. Key words:high strength rockwool fiber;anti-seismic;insulation precast;purlin;roofs;joints 高强玻纤水泥夹芯岩棉保温板适用于任何结适用于弯曲造型的建筑设计. 构的建筑保温屋面,集玻纤水泥板屋面与岩棉板保 适用于有建筑节能要求的各种结构屋面体系, 温复合层为一体,保证建筑屋面的整体质量,屋面 如钢结构、球形网架结构、木结构等屋面应用. 轻薄,减轻建筑荷载,抗震、保温...
2015年11月下 施工技术 第44卷第22期 CONSTRUCTION TECHNOLOCY 49 D0I:10.7672/sgjs2015220049 高大空间复杂钻石形采光顶施工技术 李建华,薛苏庭 (中亿丰建设集团股份有限公司,江苏苏州215000) [摘要]苏州工业园区新越百货广场工程中裙房屋面高大空间上采用复杂钻石形采光顶,其技术含量高,主要采取 的措施有:计算机三维模拟深化技术;节点整体三维模拟放样开模浇铸技术;空间定位放样技术;钢龙骨与铝龙骨 的转接件为76×4.5钢圆管与63×4钢圆管相套组合连接技术;铝龙骨与装饰格栅六爪型不锈钢连接件技术 等.着重阐述了高大空间复杂钻石形采光顶应用中的难点及其施工、质量控制方法等. [关键词]钢结构;玻璃幕墙;采光顶;施工技术 [中图分类号]TU758 [文献标识码]A【文章编号]1002-8498(2015)22-0049-05 Construction Technology of the Tall Space Complex Diamond Shaped Daylighting Roof Li Jianhua Xue Suting Zhongyifeng Construction Group Co.Lid.Suzhou Jiangsu 215000 China) Abstract:The podium building roof in Xinyue Merchandise Plaza in Suzhou Industrial Park uses plex diamond shaped daylighting roof which is difficult to be constructed.During construction some technical measures are taken such as 3D simulation deep technical the whole 3D simulation lofting and opening mould and pouring technical for joints space location and lofting technique 76 x4.5 and 663 x4 steel pipe conversion members connection technique for steel keel and aluminum keel.The authors mainly introduce the key construction points and quality control method of the plex diamond shaped daylighting roof. Key words:steel structures;glass curtain wall;daylighting roof;construction 1工程概况 新越百货苏州项目位于苏州工业园区月廊街 东侧、华池街西侧、翠园路北侧.工程总建筑面积 162921m2 建筑占地面积12162m2 建筑总高 00 00 00 850 8500 8500 98.15m.地下4层,地上22层,主楼为框架剪力墙 结构,裙房为7层框架结构.主体建筑主要分为商 a立而 场部分、停车库部分及写字楼部分,其中商场裙房 地下1层,地上7层,地上7层以上均为商务写字 楼,地下2~4层为停车库.本工程7 8层裙房屋面 共享空间上空设计采用钻石形采...
施工技术 2016年6月上 12 CONSTRUCTION TECHNOLOGY 第45卷第11期 D0I:10.7672/8js2016110012 高大模板支架结构安全状态预警研究 师宝禄 (中铁建设集团有限公司,北京100040) [摘要]为防止高大模板支撑系统在服役过程中发生整体失稳或倒塌,减少伤亡与财产损失,介绍一种圆钢管多功 能模板支架监测系统的原理及其组成,以某工程A座高大模板(支撑架)为工程背景,并通过提取特征值屈曲分析 中的一阶屈曲模态,进行缺陷敏感性分析,之后考虑初始几何缺陷进行非线性有限元分析,给出架体在正常使用状 态与极限状态下的预警值,将预警值导人到开发的软件中进行实时监测,达到预警值时进行报警信息的推送. [关键词]高大模板;脚手架;敏感性;预警值;有限元分析 [中图分类号]TU755.2;TU731.2 [文献标识码]A [文章编号]1002-8498(2016)11-0012-03 The Early Warning Research of High and Large Formwork Support System Safety Status Shi Baolu (China Railway Construction Group Co.Lad.Beijing 100040 China) Abstract:In order to prevent overall instability or collapse of high and large formwork system in the process of its service and reduce casualties and property losses this paper introduces the principle and structure design of a monitoring system of a tubular scaffold it is based on the engineering background of high and large formwork in a building and taking the first mode of eigenvalue analysis as the initial geometrical imperfections to analyze imperfection sensitivity according to the result of nonlinear finite element analysis considering initial geometric imperfections the warning value of normal bearing capacity and ultimate bearing capacity of the frame can be obtained to import into the software so the warning messages can be pushed when the warning value is reached. Key words:high and large formwork scaffolds;sensitivity;early warning value;finite element analysis 1监测系统原理及组成 碗扣式脚手架力学传递方式相比,多功能模板支架 本文采用的多功能模...
2016年1月上 施工技术 第45卷第1期 CONSTRUCTION TECHNOLOGY 63 D0I:10.7672/sgjs2016010063 高填方碳酸盐岩块石地基蠕变特性及蠕变力学模型研究* 沈志平1.2,付君宜1 2,吴斌12 (1.贵州正业工程技术投资有限公司,贵州贵阳550000;2.贵州省岩溶地基工程技术研究中心,贵州贵阳550000) [摘要]通过现场对碳酸盐岩块石高填方地基蟠变试验的研究表明:长期处于湿润状态下的岩石,其在相同应力作 用下,在加载过程中湿润状态的瞬时沉降量明显大于自然状态的瞬时沉降量,但是在加载结束后,两种状态下的 变沉降相差不大.根据自然状态和湿润状态下碳酸盐岩地基蝎变的沉降监测值,建立了碳酸盐岩的经验力学模型 和蠕变力学模型. [关键词]地基;蟠变;经验模型;变模型 [中图分类号]TU471.6 [文献标识码]A [文章编号]1002-8498(2016)01-0063-04 Study on Creep Property and Creep Model for the Rock Foundation of High Fill Carbonate Shen Zhiping.2 Fu Junyi.2 Wu Bin.2 (1.Guizhou Zhengye Engineering and Investment Incorporation Limited Guiyang Guizhou 550000 China; 2.Guizhou Karst Foundation Engineering Technology Research Center Guiyang Guizhou 550000 China) Abstract:Through field test of high fill carbonate foundation it has shown that rocks have been in a long- term moist state the instantaneous settlement of rocks creep in the moist state is significantly greater than the state of nature under the same stress but after the loading the creep settlement was not much difference.According to settlement monitoring value under moist state and nature state of rocks creep this paper established the mechanical model of experience and creep. Key words:foundations;creep;empirical model;creep model 0引言 (Q)红黏土硬塑~可塑状态,场地内普遍分 喀斯特地貌在我国广泛分布,尤其是西南各布,厚度3~5m;填方区下伏基岩主要为薄层灰岩, 省.随着中国西部山区基础设施建设的迅猛发展,少量中厚层泥质石灰岩.本工程岩层岩体较破碎, 高填方地基日益增多,其长期工后沉降直接关系到 主要为中风化.岩石主要为中厚~厚层白云岩、 机场、高速公路和铁路等设施的正常使用.目前薄~厚层灰岩及中厚~厚层含泥质灰岩.填料黏 对于碳酸盐岩的室内试验已经获得大量成果,但是...
2011年10月下 施工技术 第40卷第351期 CONSTRUCTION TECHNOLOGY 67、 高填方涵洞EPS板减荷施工技术研究 曹周阳,王晓谋,顾安全,姜峰林2 (1.长安大学公路学院,陕西西安710064;2.广东省冶金建筑设计研究院,广东广州510000) [摘要]由于高填方涵洞受力过大,通常所设计的涵洞结构尺寸大、造价高、病害多.因此,在以往研究的基础上, 通过室内外试验,将一定厚度的EPS板铺设在盖板涵顶部进行减荷,结果表明:EPS板能够显著减小涵顶土压力, 试验测得涵顶土压力为土柱压力的0.28~0.47倍.同时,分析了EPS板在各种机械施工荷载作用下的受力情况, 根据计算结果,提出了一套EPS板顶进行土体回填的具体施工技术,并在实际工程中验证了该套技术的可行性,不 但保护了EPS板及达到减荷效果,而且保证了工程质量. [关键词]公路;高填方涵洞;EPS板;施工技术 [中图分类号]U449 [文献标识码]A [文章编号]1002-8498(2011)20-0067-04 Study on Construction Technology of Load Reduction with EPS Board for High Filling Culvert Cao Zhouyang' Wang Xiaomou' Gu Anquan' Jiang Fenglin2 (1.Highway College Chang'an University Xi'an Shaanxi 710064 China: 2.Guangdong Metallurgy and Architecture Design Institute Guangzhou Guangdong 510000 China) Abstract:Due to the large earth pressure of high filling culverts the mon.culvert structure has large size high cost and many diseases.Therefore on the basis of past research through indoor and outdoor tests a certain thickness EPS board is laid on the top of plate culvert to reduce the load.The results show that laying EPS board can significantly reduce the earth pressure on the top of culvert.The earth pressure on the top of culvert which is obtained from the tests is 0.28 to 0.47 times of that earth column pressure on the top of culvert.Meanwhile the stress conditions of EPS board with a series of mechanical construction loads are analyzed.According to the calculation results a set of specific construction technology for backfi...
2012年1月上 施工技术 第41卷第356期 CONSTRUCTION TECHNOLOGY 61 高填方填筑体处理效果评价研究 周立新,周虎鑫,黄晓波 (空军工程设计研究局,北京100068) [摘要]在高填方工程中,湿陷性黄土作为填料,对其填筑体处理效果评价开展研究至关重要.以95%的压实度标 准,对填筑体处理效果从室内试验、K检测、载荷试验、浸水载荷试验、回弹模量、物探(面波)检测等指标进行综合 评价.处理后的填筑体得到很好的压实效果,湿陷性已完全消除,满足各项设计要求.处理效果评价说明了施工 方法和参数的合理性与有效性;试验所得相关指标可为沉降计算、边坡稳定性分析、施工质量控制提供参数依据. [关键词]填料;湿陷性黄土;强度;回弹模量;沉降 [中图分类号]P642.3 [文献标识码]A [文章编号]1002-8498(2012)01-0061-03 Study on Treatment-effect Evaluation in High-fill Project Zhou Lixin Zhou Huxin Huang Xiaobo (Air Force Engineering Design &Research Institute Beijing 100068 China) Abstract:In high-fill project by collapsible loess filling it is very important for engineering to study on treatment-effect evaluation.Based on 95%of pacting standard the authors make prehensive evaluation on the treatment-effect from indoor test Ko test load-settlement test soaking load-settlement test rebound modulus and geophysical detection.The high-filling obtains good pacting effect and clears up collapsibility which can meet design demands.According to treatment-effect evaluation the construction method and parameters are reasonable and effective.Meanwhile the parameters from test can be references for settlement calculation slope stability analysis and quality control. Key words:filling;collapsible loess;strength;rebound modulus;settlement 我国的西北黄土高原为典型的侵蚀剥蚀黄土露.由于工程建设的需要,场地内需要进行大规模 粱峁地貌,地形起伏、沟谷深切,开展工程建设必然“挖山填沟”的高填方工程.填料主要为梁上的湿 存在着深挖高填,而高填方填筑体压实质量的好坏陷性黄土(Q) 具有自重湿陷性,湿陷性中等~强 则是工程成败的关键因素.湿陷性黄土是一种特烈,试验段填方最大高度近30m. 殊的第四纪大陆松散堆...
施工技术 2010年6月 86 CONSTRUCTION TECHNOLOGY 第39卷第6期 高原复杂地质条件下固结灌浆施工参数选定 尚晓威,邱敏 (武水电第二总队五支队,江苏常州213031) 【摘要]新疆察汗乌苏水电站是新疆开都河流城上游规划建成的第三个梯级电站,由于察汗乌苏水电站右岸溢洪 洞在开挖过程中多次出现不同程度的局部塌方,因此在固结灌浆施工前进行了固结灌浆试验,以此来调整灌浆各 项参数.结合原现场试验和补充灌浆试验,介绍灌浆设计参数以及施工顺序.通过分析灌浆注人量、平均注水率 以及单位注人量和质量检查成果,认为补充灌浆试验后的施工方法更为合理,保证了施工质量和安全. [关键词]水电站工程;高原地质条件;固结灌浆;施工质量 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2010)06-0086-02 Construction Parameters Selection of Consolidation Grouting Under Complex Plateau Geological Conditions Shang Xiaowei Qiu Min (No.5 Detachment No.2 Hydropower Force of Armed Police Changzhou Jiangsu 213031 China). Abstract:Xinjiang Chahanwusu Hydropower Station is the third cascade hydropower station in the upstream of Kaidu River in Xinjiang.It happens that different partial collapses for many times during the process of excavation at right-bank spillway in the hydropower station.Thus consolidation grouting test is done before grouting construction to adjust all kinds of parameters.Based on original on-site test and supplementary grouting test design parameters and construction sequence are introduced.The construction method with supplementary grouting test is more reasonable by analyzing injection amount average water-injection rate unit injection amount and quality check result.As a result construction quality and safety are ensured. Key words:hydropower engineering;plateau geological condition;consolidation grouting;construction quality 1工程概况 身固结灌浆的灌浆施工工艺、方法,确定灌浆孔排距、 新骚察汗乌苏水电站工程枢纽主要由建在覆盖层灌浆压力、水灰比等施工参数,...
施工技术 2012年6月下 104 CONSTRUCTION TECHNOLOGY 第41卷第367期 高原地区外墙大面积氟碳漆施工技术 顾小锐,张万维 (武警水电第二总队入支队,福建厦门361009) [摘要】拉萨主400kV换流站是目前世界上海拔最高的换流站(海拔3819m) 是国家电网公司的一号工程.根据 该工程标准高、工期紧、任务重、高缺氧等特点,为保证装修工程装饰效果,外墙装饰确定采用氟碳漆施工.重点 介绍了在拉萨换流站外墙大面积氟碳漆施工技术,包括施工工艺和要点,材料选用以及质量要求.结果表明,实体 质量和外观质量符合规范要求. [关铺词]高原地区:装饰工程:涂料:氟碳漆:施工技术 [中图分类号]TU767[文献标识码]A [文章编号]1002-8498(2012)12-0104-03 Construction Technology of Large Area Fluorocarbon Coating for Exterior Wall in Plateau Area Gu Xiaorui Zhang Wanwei No.8 Detachment No.2 Hydropower Foree of Armed Police Xiamen Fujian 361009.China) Abstract:The±400 kV converter in Lhasa is the highest altitude converter with389 meters in the world currently which is the No.1 project of State Grid Corporation of China.According to strict construction requirements of the engineering and environment conditions short construction time large work quantity and thin oxygen at high altitudes with low temperature the fluorocarbon coating is adopted in exterior wall decoration.The key points of large area of fluorocarbon coating construction technology are introduced including construction technology and points material selection and quality demands.The results show that the entity quality and appearance quality meet standards. Key words:plateau area;decoration;coatings;fluorocarbon coating:construction 1工程概况 化等多项技术指标优于普通涂料. 青藏±400kV拉萨换流站位于林周县甘曲镇朗2.1氟碳漆使用范围 塘村西侧约900m处,南距拉萨市区约18km(公路里 建筑物外墙、屋顶以及各种建材首选的耐久性 程约80km) 澎波河在站址北面2km处.该工程综合装饰保护材料. 楼及警卫传达室外墙装修采用氟碳漆.建筑外墙主 2.2性能 要采用国家电网通用的绿色、浅灰色、中灰色、...
施工技术 2014年11月下 94 CONSTRUCTION TECHNOLOGY 第43卷第22期 D01:10.7672/sjs2014220094 高压气囊平移建筑物工程设计方法研究 李旭光,付素娟2,李佳1 (1.河北建研科技有限公司,河北石家庄050021;2.河北省建筑科学研究院,河北石家庄050021) [摘要]高压气囊平移主要应用于船舶下水、沉箱出运等工程,本文首次将其引入建筑物的平移,对该工程的方案 选择、上部结构加固设计、基础及下轨道设计、托换设计、牵引系统设计及就位连接进行了研究分析. [关键词]建筑移位;高压气囊;托换;平移 [中图分类号]TU746.3 [文献标识码]A [文章编号]1002-8498(2014)22-0094-05 Design Method Research on Building Translation by High-pressure Gasbag Li Xuguang' Fu Sujuan2 Li Jia' (1.Hebei Building Research Engineering Co.Ltd.Shijiazhuang Hebei 050021 China; 2.Hebei Academy of Building Research Shijiazhuang Hebei 050021 China) Abstract:High-pressure gasbag translation is mainly used in ship launching caissons shipment and other projects.This article brings it into the structure translation for the first time which presents the analysis on solution selection the foundation and the orbit design the underpinning design the traction system design and linking etc. Key words:building moving;high-pressure gasbag;underpinnings;translation 建筑物整体移位是根据原建筑物的结构形式、行平移尚属首例.本文以成功的实际工程为研究 整体刚度、工程地质情况、现场施工条件、经济投资背景,结合理论分析,对高压气囊平移建筑物进行 对比等多方面因素综合选定方案.其基本原理是 探讨,为今后的类似工程提供参考. 对现有建筑物进行必要的结构加固,根据托换理论1工程概况 改变其传力体系,从而使建筑物与基础或地基脱 该工程位于某国道与公路的交口,为公路转盘 离,使建筑物形成可移动的单元体,然后通过整体 内的城市景观雕塑.由于其体积较高大,存有遮挡 顶升、推拉等技术手段,使建筑物移动到新的位置. 视线的交通隐患,因此该雕塑需向东北方向平移 建筑物平移设备分为动力设备和行走机构两 117m至公园内(见图1).该雕塑为砖与混凝土的 部分.我国目前应用较多的动力设备为千斤顶(螺 混合结构,由锣鼓造型和底座两部分组成,底座外 旋、液压)、卷扬机等,行走机构以钢滚轴为主. 部周圈墙体及上部锣鼓造型为钢筋混凝土结构,底 高压气囊搬运技术在船舶下水、沉箱出运等工 座内部竖向支撑锣鼓造型墙体为370mm厚砌体结 程的应用已非常成熟,如广东省粤电惠来(靖海)电 构.结构底部为...
施工技术 2014年3月下 12 CONSTRUCTION TECHNOLOGY 第43卷第6期 D01:10.7672/js2014060012 高压旋喷桩止水帷幕在人民日报社报刊 综合业务楼中的应用 李哲琳,白志华,刘露超,赵海军 (中国新兴建设开发总公司,北京100039) [摘要]人民日报社报刊综合业务楼深基坑止水采用在基坑外侧喷射注浆形成一道连续防水墙,连续止水帷幕和 护坡桩相结合的方法,在基坑四周封堵.经严格控制,取得了良好的施工效果,有效地控制了地下水,保证了基坑 的安全和后续施工的顺利进行.具体阐述了止水帷幕技术要求及施工方法,总结了施工质量的控制要点. [关键词]高层建筑:深基坑;止水帷幕:高压旋喷桩:施工技术 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2014)06-0012-03 Application of High-pressure Sprayed Piles with Waterproof Curtains in the People's Daily Project Li Zhelin Bai Zhihua Liu Luchao Zhao Haijun China Xinxing Construction Derelopment General Co.Beijing 100039 China) Abstract:A continuous waterproof wall is formed by grouting concrete outside of the foundation excavation in the People's Daily project the foundation excavation is sealed with the bination method of waterproof curtain and slope protection piles.By the strictly control for the construction the good construction effect is obtained and the underwater is in control.Meanwhile the foundation excavation safety and construction sequence are guaranteed.The requirement and construction method of waterproof curtain are described in detail and the control points for construction quality is summarized. Key words:tall buildings;deep foundation excavation;waterproof curtain;high-pressure sprayed piles;construction 高压旋喷桩止水帷幕是利用高压把浆液从喷2工程地质及水文地质条件 嘴喷射出,冲击破坏土层,使浆液和土体充分搅拌 根据岩土工程勘察报告,场区地势较平.场地 混合,随着注浆管的旋转和提升而形成圆柱形桩地层按成因年代分为人工堆积层和第四纪沉积层2 体,通过旋喷桩和护坡桩之间相互搭接,形成一道大类,地层岩性及其分布特征自上而下主要描述如 连续的止水帷幕,以隔断地下水进入基坑,保证基下:①房渣土、碎石填土,①,...
施工技术 2017年1月下 72 CONSTRUCTION TECHNOLOGY 第46卷第2期 D0I:10.7672/5gj2017020072 高压旋喷桩内插H型钢技术及在某基坑 加固工程中的应用 唐君12,闫双跃12,段启伟12,张庆云1.2,江宁1 2 (1 中国建筑科学研究院地基基础研究所,北京100013;2.建研地基基础工程有限责任公司,北京100013) [摘要]综合考虑工程地质及水文地质条件、场地施工条件、对基坑临近建(构)筑物保护等因素,采用高压旋喷桩 内插H型钢技术对事故基坑进行加固,利用高压旋喷柱的截水性能来防止泥炭(质)土的流失,同时利用H型钢的 高强度、刚度满足支护结构的承载能力和变形控制要求.实施效果和施工监测表明,采用的基坑加固方案有效、可 靠,保证了二次开挖过程中基坑及临近建(构)筑物的安全. [关键词]基坑工程;高压旋喷柱;泥炭(质)土;加固;设计;应用 [中图分类号]TU43 [文献标识码]A [文章编号]1002-8498(2017)02-0072-04 Technology of High Pressure Jet Grouting Pile Interpolated with H-shape Steel and Application in Reinforcement of an Excavation Project Tang Jun.2 Yan Shuangyue.2 Duan Qiweil.2 Zhang Qingyun'.2 Jiang Ning1.2 (1.Institute of Foundation Engineering of China Academy of Building Research Beijing 100013 China: 2.CABR Foundation Engineering Co.Lid.Beijing 100013 China) Abstract:According to the engineering geological and hydro-geological conditions site construction conditions and the protection requirements for adjacent building (structure )the technology of high pressure jet grouting pile interpolated with H-shape steel was adopted for the reinforcement of the excavation.In this reinforcement scheme the water interception performance of high pressure jet grouting pile was used to prevent erosion of the peat pcaty)soil and the high strength and stiffness of H-shape steel was used to meet the bearing capacity and deformation control requirements of the retaining and prevention structure.The implementation effect and construction monito...
[关键词】混凝土;外加剂;超缓凝剂;高保塑;耐久性 [中图分类号】TU528.042 【文献标识码】A [文章编号]1002-8498(2012)20-0053-05 StudyandApplicationofaNovelHigh Plasticity-maintainingSuperRetarder Huang Bo,Wang Jun,Liu Ming,Tang Yuchao,Wang Chan (China Construction Ready-mixed Concrete Co.Lad,Wuhan,Hubei 430074, China) Abstract;Super retarder is a key technology in the preparation of ultra-retarding concrete.A super retarder for concrete was developed by using polymer chemistry method.The influence of super retarder on the fluidity of cement paste,the condensation time of the cement,conerete workability and late mechanical properties were studied,and its performance was discussed bined with practical engineering applications.The test results show that the super retarder under low dosage (0.1%~ 0.5%)has good plasticity-maintaining ability and can control the slump loss for 3 ~7hours.As the dosage increased, the setting time of the cement paste and the time of slump gradually extends to achieve ultra-high retarding state with the dosage of 0.5%o ~ 2. 0%o.The concrete over 22 hours can keep the slump at 200mm or more and the slump flow can reach more than. 500mm. The super retarder has reinforcing effect on the late strength of the concrete as the final strength increased by 10%.Meanwhile, the prepared ultra-retarding concrete demonstrated excellent durability. Key words:concrete;admixture; super retarder;high plasticity-maintaining; durability 0前言 裂缝;对于夏季高温环境下施工的混凝土,超缓凝 超缓凝剂是一种新型的混凝土外加剂,不仅能 剂可以延长混凝土的运输时间,减少坍落度损失, 够长时间内(例如≥24h甚至更长时间)任意调节混 是保证混凝土泵送、浇灌和施工的有效方法。
2017年8月上 施工技术 第46卷第15期 CONSTRUCTION TECHNOLOGY 93 D0I:10.7672/8js2017150093 高低复合型壅水溢流堰设计与施工 罗光财,蔡甫,刘伟华,陈燚 (中建五局土木工程有限公司,湖南长沙410004) [摘要]以舞水河怀化城区段综合治理工程项目为例,通过设计和施工一种高低复合型水溢流堰,探讨塞水溢流 堰施工技术在降低河流两岸综合治理工程施工水位的实际应用,节约资源和减少对环境的负面影响,实现绿色施 工.重点介绍了复合型雍水溢流堰的施工技术措施. [关键词]水利工程;综合治理;溢流堰:设计;施工 [中图分类号]TV653 [文献标识码]A [文章编号]1002-8498(2017)15-0093-03 The Design and Construction of High-low Composite Backwater Overflow Weir LUO Guangcai CAI Fu LIU Weihua CHEN Yi (CCFEB Civil Engineering Co.Ld.Changsha Hu'nan 410004 China) Abstract:Taking the prehensive management project of the Wushui River in Huaihua City as the research carrier a high-low posite backwater overflow weir was designed and constructed.In order to reduce the river prehensive treatment project construction level construction technology of backwater overflow weir is discussed which can save resources and reduce the negative impact on the environment to achieve green construction.The construction techniques for posite backwater overflow weir are introduced in detail. Key words:water conservancy engineering;prehensive treatment;overflow weir; design;construction 1工程概况 2高低复合型壅水溢流堰设计 舞水河为沅江一级支流,发源于贵州瓦安县内 河水位较高,水位周期性变化大,如采用纵向 1100m高峰,于黔城汇入沅江,全长444km 平均坡 施工围堰止水,填筑土方数量巨大,且易污染河流. 降1.26%o.流域面积18578km2.流经城区的河 为减少修筑舞水河防洪工程施工难度,降低施工成 西、城中、鸭嘴岩区时,河水常水位标高为212.000m 本,同时为保障自来水厂正常取水生产,市民的用 左右,正常水位平均河宽105m 水深8m 流量 水不受影响,在施工段上游修建雍水溢流堰,既降 420m3/s;枯水期平均河宽70m 水深6m.历史最大 低下游水位,又保持上游水位.同时,由于周围是 洪峰流量10700m3/s 50年一遇洪水位219.4m 每 繁华的商贸区,壅水溢流堰施工场地狭...
[关键词】隧道工程;软岩隧道;上下台阶法;数值模拟;围岩;变形;支护;监测 [中图分类号]U456.3 [文献标识码]A [文章编号]1002-8498(2012)01-0087-05 Deformation Rule and Simulation Analysis of Supporting Technology on Soft Rock Tunnel in Maanziliang Tunnel Ren Jianxi,Dang Chao (SchoolofArchitecture andCivilEngineering,Xi’anUniversity ofScience andTechnology,Xian,Shaanxi710054,China) Abstract:Combined with Maanziliang tunnel engineering,using FLAC numerical simulation method to analyze the whole process of benching tunneling method, the study on actual monitoring is pleted. Compared with the numerical simulation results, authors get the soft rock tunnel surrounding rock deformation,and suggest the reasonable supporting scheme. The results show that the excavation method is applied for the soft rock tunnel. Vertical displacement is mainly concentrated on the top and bottom of the dome and the dome displacement is relatively large.Horizontal displacement is mainly concentrated on the shoulder and foot. The actual monitoring shows that the tunnel vault settlement and horizontal state,over time the deformation rate is small and the curve tends to be stable. The FLAC numerical simulation results are basically the same as the measured results. The Reasonable interval between the first support and the second support is 30 days. Key words:tunnels; soft rock tunnels;benching tunneling method; simulation; surrounding rock; deformation;supporting;monitoring 隧道施工理论计算与现场监测成为隧道施工监测,对隧道上下台阶法施工过程进行模拟,通过 安全性保障的有利证明,通过现场对围岩与支护形与现场监测数据对比,得出上下台阶法施工对此隧 式监测,为下一步初期支护和二次支护参数调整提道目标断面开挖比较合理的结论。