钢梁施工多点同步顶推技术及质量安全控制

研究目的:郑州黄河公铁两用桥是石武高速铁路跨越黄河的关键通道,主桥采用连续钢桁结合梁多塔斜拉桥,它同时满足高速铁路及高铁上部一级公路的行车要求,技术含量高、施工难度大。为了总结经验,并为类似工程的建设提供有效的借鉴和参考,本文详细介绍主桥钢梁采用的同步顶推架设工法,并着重阐述在主桥架设中确保施工质量和施工安全的控制要点。研究结论:钢梁整体多点同步顶推法的成功,攻克了较大江、河上建设大跨度桥梁的又一个技术难关,也为我国桥梁建设增添了一项成熟的施工技术。该桥建设的实践经验证明,施工现场质量和安全因素的控制,已经成为新技术、新工艺结构成功的基本保障。在质量控制方面,需对杆件制造、杆件拼装、动力源、随机纠偏加以严格控制,才能确保钢桁梁施工的整体质量;在安全控制方面,必须认真做好拼装平台的稳定性与可靠性、构件吊装安全保证措施、顶推力传导体系的监控等方面的工作。

论钢箱梁桥安装重难点分析及安全质量控制措施

改革开放以来,我国公路建设步伐十分迅速,钢箱梁是一种新型桥梁建设模式,具有跨度大、自重轻、施工便捷、工期短、运输方便等特点,所以逐渐受到市场的青睐,成为当前桥梁建设中广受欢迎的建设模式,得到了广泛运用。但是,不同的工程情况,钢箱梁的施工安装会遇到不同的困难,正视和克服这些困难,保障安装质量,对公路桥梁建设的整体质量至关重要,文章将以云南小龙高速公路土建第15 标兔耳关枢纽互通式立交工程钢箱梁的安装为例进行说明,为促进公路桥梁钢箱梁的安装质量的提高提供一些参考和启示。

大木作榫卯结构施工技术

近年来,随着城市建设和旅游业的发展,为了展现本地历史文化底蕴,满足人们对民族传统文化日渐强烈的追求,各地兴建了一大批以木、木石榫卯结构为主的仿古建筑。然而,传统的锤击榫卯组拼施工工法在施工过程中经常会受诸多因素影响,出现施工技术及质量问题,严重影响工程施工进度、质量。针对此现象,文章介绍了一种利用捆绑器组拼榫卯构件的施工工艺,并提出几点质量、安全控制的建议,以供参考。

Combinative Approaches of Chemistry, Pharmacology and Toxicology for the Optimal Pharmaceutical Preparation of an Anti-arthritic Chinese Medicine Formulation QFJBT

Objective Qing Fu Juan Bi Tang(QFJBT)is an anti-arthritic Chinese medicine formula consisting of five herbs:Aconiti Lateralis Radix Praeparata(Fu Zi,附子),Sinomenii Caulis(Qing Feng Teng,青风藤),Astragali Radix(Huang Qi,黄芪),Paeoniae Radix Alba(Bai Shao,白芍)and Moutan Cortex(Mu Dan Pi,牡丹皮),which have well-established histories of use for treatment of rheumatic and arthritic diseases.We intended to establish the optimized and standardized pharmaceutical procedures and manufacturing processes for the pilot production of QFJBT to develop it as a novel botanical drug product for treatment of rheumatoid arthritis(RA).Methods The combinative approaches of chemical assessment,toxicological and pharmacological evaluation were explored to define the pharmaceutical preparation of QFJBT.Results The optimized and standardized pharmaceutical procedures and manufacturing processes for the pilot production of QFJBT were established in terms of greatest chemical contents of bioactive constituents,potent anti-inflammatory and antinociceptive activities,and favorable safety profile.Quality analysis of the pilot product of QFJBT by high-performance liquid chromatography(HPLC)demonstrated that the chromatographic fingerprint profiles of three batches of QFJBT were basically identical and the contents of four characteristic and bioactive markers were relatively consistent.General toxicological studies showed a favorable safety profile of QFJBT.The maximum tolerated single dose of QFJBT was determined in both sexes of rats to be 33.63 g/kg body weight which is equivalent to 346 times of clinical dose.In the chronic oral toxicity study,the results of laboratory investigation showed that QFJBT at doses of 3.89,6.80 and 9.72 g/kg body weight(equivalent to 40,70 and 100-fold clinical doses,respectively)caused no changes in all hematological parameters and blood biochemical parameters of rats.No mortality or specific toxic responses were observed in animals after three months of repeated dosing with QFJBT.Conclusion The optimized and standardized pharmaceutical and manufacturing processes for the production of QFJBT have been successfully screened and identified through established rigorous in-process controls.

从马钢北京办事处装潢工程看监理的新特点

建筑装潢工程是美学与技艺的结晶,装潢效果在是通过使用功能来实现的,使用功能是依靠每道工序精心施工完成,工序质量是由人、机、物、环境、工艺五大因素所决定的。利用各种材料的特性,采用不断完善更新的工艺来凸现作品。为了业主的需要把设计、材料与施工之间的关系理顺,掌握其内在关键性环节的管理进行有效的监督与管理是非常重要的。同时通过我们的监理努力更加促进建筑装潢应用技术的健康发展和建筑装潢工程质量的提高。

Study on life-cycle risk management of high earth-rock dam project

Based on advanced computer technology, internet of things （lOT） technology, project management con- cept and professional technology and combined with the innovative theories, methods and techniques in earlier hy- dropower projects, the life-cycle risk management system of high earth-rock dam project for Nuozhadu project was developed. The system mainly includes digital dam, three-dimensional design, construction quality monito- ring, safety assessment and warning, etc, to integrally manage and analyze the dam design, constructional quality and safety monitoring information. It realized the dynamic updates of the comprehensive information and the safe- ty quality monitoring in the project life cycle, and provided the basic platform for the scientific management of the construction and operation safety of high earth-rock dam. Application in Nuozhadu earth-rock dam showed that construction safety monitoring and warning greatly helped accelerate the construction progress and improve project quality, and provided a new way for the quality safety control of high earth-rock dam.

Food Physics and Food Safety- Some Aspects in Food Processing and Food Quality Control

The article deals with special questions of some aspects of food safety and application of methods of food physics in food processing and also in food quality control and quality assurance. The role of food safety has developed significantly in the last 2 decades, so today the production and processing of safe and quality food is of primary importance. Modem food production is based on principles of GAP and GMP （including GHP） and different methods and tools for quality control and assurance （IFS, HACCP, ISO-9000, ISO-9000/2010, ISO-22000, TQM）. There are different techniques and methods to produce safe food and to control the quality of the foodstuffs. The modem, up-to-date technologies and measurement techniques involve the application of many physical methods - high pressure, pulsing electrical field, microwave, non-destructive techniques （e.g., INAA, NMR, NIR-NIT, PAS）, radiation treatments as well. Using radiation technologies （of course not only nuclear ones） it is possible to fulfil some very important expectations of modem food processing, e.g., decrease of microbial contamination, improvement of sensory properties, increase of storability of food products.

Exploration of Factors Influencing Oolong Quality and Control Technology in Anxi County

In the research, harmful substances to oolong in Anxi were introduced and production environment, agricultural residual, heavy metal and rare earth ele-ments of oolong in Anxi were analyzed. Furthermore, the factors influencing oolong quality were explored, and the control measures for guaranteeing oolong safety were proposed.

桥梁钢箱梁安装施工技术问题研究

针对于跨越高速公路、城市主干道、铁路及河道等复杂情况下桥梁钢箱梁施工安装的技术难题,已完工某互通枢纽钢箱梁安装成功经验,形成完善施工组织设计、施工方案、顶推施工安全分析、安装精度控制的完整技术,施工控制及安全保障体系,促进提高钢箱梁安装施工技术及安全控制。

Characteristics of China's Automobile Recall Actions

For the purpose of enhancing automobile safety and the effectiveness of recalls,increasing manufacturers' quality control capabilities,and reducing defects,we investigated thestatus of recalls over the last five years.We have examined patterns and trends in motor vehiclesafety recalls using databases from China,Europe and the United States.A recall rate parameterwas developed to evaluate the level of recall enforcement based on analyzing the reasonsfor recalls and manufactures' characteristics.Moreover,there were substantial differencesin the recall rates of China compared with those in other countries,indicating that Chinese manufacturersneed to take more active action in recall.