2016年4月上 施工技术 第45卷第7期 CONSTRUCTION TECHNOLOGY 109 D0I:10.7672/8js2016070109 不同坡度下偏压黄土隧道开挖衬砌结构受力特征研究 肖启山 (中铁十一局集团第五工程有限公司,重庆400037) [摘要]偏压隧道的受力与常见的对称应力的受力情况有较大区别,随着西部地区基础设施建设的发展,在建设工 程中经常遇到不同偏压地形下的黄土隧道,由于偏压隧道的特殊性,受力极不对称,对隧道的设计和施工产生较大 影响.为了研究偏压黄土隧道开挖围岩及衬砌结构受力特征,利用FLAC3软件建立数值模型,计算不同坡度地形 条件下隧道的围岩变形规律和衬砌结构的受力特征. [关键词]隧道工程;偏压;黄土;受力分析;数值模拟 [中图分类号]U455 [文献标识码]A [文章编号]1002-8498(2016)07-0109-04 Study on the Force Feature of Lining Structure for Large Bias Loess Tunnel Under Different Slope Gradient Xiao Qishan The 5th Engineering Ltd.of the 11th Engineering Bureau of China Railay Chongqing 400037 China Abstract:The stress situation of bias tunnel is quite different from the mon stress situation symmetrical stress.More and more bias tunnels are encountered in the actual project with the development of construction due to the special nature of the bias tunnel so the force discontinuity symmetry.In order to study the forees of lining structure construction process for bias tunnel a numerical model of loess tunnel is established by FLAC3D software which e into different surrounding rock slope gradient using up and down stairs construction method for the construction the bias tunnel’s construction process simulation is done by different wall rock slope gradient. Key words:tunnels;bias;loess;stress analysis;simulations 0引言 偏压隧道是承受不对称荷载的隧道[12,这种 偏压隧道的受力与常见的对称应力的受力情不对称性主要是隧道左右两边围岩结构的不对 况有较大区别,随着建设的发展,在实际工程中遇 称,最常见的是隧道穿越边坡的情况.钟新樵[3] 到越来越多的偏压隧道,由于偏压隧道的特殊性,对偏压隧道模型的衬砌试验,给出了偏压隧道的 使隧道不得不修建在边坡的...
施工技术 2016年12月下 82 CONSTRUCTION TECHNOLOGY 第45卷第24期 D0I:10.7672/sgjs2016240082 不同压实工艺对路面基层质量影响因素分析 王壁东,周彦,刘子玉 (中建六局桥梁有限公司,重庆402260) [摘要]水稳路面基层质量控制与混合料的结构、性能及成型方法密切相关.室内通过对同一级配水稳混合料分 别按振动击实法和重型振动法、振动法和静压法进行试验,对比分析了2套试验方法的物理性能、结构特点以及与 施工现场试验检测结果.结果表明,室内标准试验方法采用振动压实法和振动法更符合模拟现场施工工艺,振动 压实法和振动法更适合水稳混合料的配合比设计,以该方法确定的最大干密度、最佳含水量和7d无侧限抗压强度 来控制现场施工质量更为合理. [关键词]路面工程;水稳;振动法;静压法;质量控制 [中图分类号]U416.2 [文献标识码]A [文章编号]1002-8498(2016)24-0082-03 Analysis of the Influence Factors on the Quality of Road Base by Different Compacting Method Wang Bidong Zhou Yan Liu Ziyu China Construction Sixth Engineering Division Bridge Co.Ltd.Chongging 402260 China) Abstract:The quality control of cement stabilized gravel pavement is closely related to the structure property and forming method of the mixture.The same indoor mixture gradation of cement stabilized gravel is tested respectively by pacting method with weight and pacting method with vibrating vibration method and pacting method with vibrating and static pressure method.The field test construction of the physical properties of two kinds of test methods structural features and the testing results are pared.The results show that the laboratory test method standard using vibration method and pacting method with vibrating are more suitable for simulation of site construction the mix design of vibration method and pacting method with vibrating are more suitable for the cement stabilized gravel mixture.The maximum dry density optimum moist...
施工技术 2015年7月上 12 CONSTRUCTION TECHNOLOGY 第44卷第13期 D0I:10.7672/8gjs2015130012 “Ⅱ”型接头在地下连续墙中的应用与分析 金晓飞1,尹寒青,梁书亭,朱筱俊,骆明红2,沈兴东2 (1.东南大学土木工程学院,江苏南京210096;2.中建八局第三建设有限公司,江苏南京210046) [摘要]介绍了地下连续墙“”型接头的设计方法、施工技术及相关技术措施,并应用于工程实例.工程中“Ⅱ”型 接头与地下连续墙槽段分开施工,提高了新型接头地下连续墙的施工效率.“Ⅱ”型接头保留了工字钢接头绕流路 径较长的优点,使得地下连续墙槽段连接处防渗性能较好.槽段全部按照闭合幅施工,地下连续墙的施工质量得 到了保证,一定程度上克服了钢筋笼下放时易出现的卡笼现象. [关键词]地下工程;“”型接头;地下连续墙;施工技术 [中图分类号]TU476.3 [文献标识码]A [文章编号]1002-8498(2015)13-0012-03 Application and Analysis of II-type Joint of Diaphragm Wall Jin Xiaofei' Yin Hanging' Liang Shuting' Zhu Xiaojun' Luo Minghong2 Shen Xingdong (1.School of Civil Engineering Southeast University Nanjing Jiangsu 210096 China;2.The Third Construction Co.Ltd.of China Construction Eighth Engineering Division Nanjing Jiangsu 210046 China) Abstract:This paper mainly introduces the design guideline construction techniques relevant counter measures and an engineering application of II-type joint of diaphragm wall.The new construction method of joint can be separated from panels which improves the wall's efficiency of construction.The new type joint retains the advantage of a long flow path which makes the wall a good seepage performance.The new construction method ensures each panel of the diaphragm wall constructed as a closed panel which overes the reinforcing cage jammed when it lowered. Key words:underground;II-type joint;diaphragms;construction 0引言 难以保证等施工难题. 近年来,在我国的地下连续墙工程中工字钢接1工法特点与流程 头是较常用的一种接头形式,这种接头具有防渗漏1.1工法特点 性能好、连接可靠、抗剪强度高、整体性较好等优 与传统的...
2010年9月 施工技术 第39卷第9期 CONSTRUCTION TECHNOLOGY 111 射线衍射法在既有钢结构应力检测中的应用 李大林,陈鲁2,张其林 (1.同清大学土木工程学院,上海200092:2.上海同清建设工程质董检测站,上海200092) [描要]省多品材料中存在应力时,其内邮品面陶距就会发生盘化,导致刺线衍射港线产生位移.通过分析衍刺 峰位的变化,就可以测量材料中内应力大小及方向.以辽守菜体育馆旅支顶结构为背景,引入射线衍新法测 试了12根径偷杆的应力,并设计结果进行比转,检侧结果表明,传构张拉施工满足计要求,构件实际应力设 计应力较为接近,构处于安全状态.本方法对既有钢结构建筑的护和安全性祥体提供了量化缘据. [关键词]既有铜结构:X射线衍射:应力检测 [中分类导]TU391 [文献标识移]A [文章编号]1002-8498(2010)09-0111-03 Application of X-ray Diffraction Method in Stress Measurement of Existing Steel Structures Li Dalin' Chen Lu2 Zhang Qilin' (1.Ciril Engineering School Tongji University Shanghai 200092 China: 2.Shanghai Tongji Construction Quality Inspection Station Shanghai 200092 China) Abstract:When internal stress exists in polycrystalline materials the interplanar crystal spacing will consequently change and the X-ray diffraction spectrum will vary as well.The internal stress of materials can be figured out by analyzing the displacement change of the diffraction peak.The X-ray diffraction method is adopted to test the stress of 12 radial members of a stadium suspended-dome in Liaoning province.The parison results between the testing data and the designing data show that real stress of the members matches the design stress well and the construction quality meets the design requirement. Totally the structure is in safety.The Xray method gives a quantitative basis for maitaining and safety evaluating of existing steel structures. Key words:existing steel structure:X-ray diffraction:stress measuremen...
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