螺纹钢牙筋长度不足的原因及解决办法

分析了影响螺纹钢牙筋长度的原因，根据铣床的工作原理，利用刀头夹持长度与凸轮工作轨面半径的几何关系，推导出计算各种不同规格螺纹钢牙筋的工艺参数，解决了螺纹钢牙筋长度不足之问题。     

Constructing a short form of the Smoking Consequences Questionnaire with adolescents and young adults.

The goal of the present studies was to construct and validate a short form of the 50-item Smoking Consequences Questionnaire (SCQ; T. H. Brandon & T. B. Baker, 1991), a measure of smoking outcome expectancies. In Study 1, a 21-item short form (S-SCQ) was derived from a sample of 107 young adults previously treated for substance abuse. In Study 2, the measure was cross-validated on 125 adolescents in treatment for substance abuse. Confirmatory factor analyses revealed good model fit and factorial invariance for the 4 S-SCQ subscales across both samples. Validation analyses on each sample found that subscale scores generally correlated significantly with smoking-related variables. The present studies provide initial evidence for the utility of the S-SCQ when used with young adults and adolescents. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

养马岛大桥钢管拱肋支撑架的设计与施工

介绍了养马岛大桥钢管拱肋支撑架的设计与施工，从设计方案的比选、施工技术等方面进行了论述，指出该桥使用此种支架施工，保证了质量，降低了成本。     

中国冷库的现状与发展趋势

本文从的设计建造、制冷工艺和管理维护这三个方面，介绍了近三年来中国冷库的现状，说明中国冷库正朝着灵活、自动化、节能和环保的方向进一步发展。     

在湿陷性黄土地区对混凝土夯扩桩的检测

对夯扩桩在豫西湿陷性黄土地区的应用和可行性分析与检测。     

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本文根据四川天然气产能建设多年的实践,分析了产能建设的特点和存在问题,着重强调了当前搞好产能建设应注意的几个问题,供决策和工作参考。     

Investigation on compounding and application of C80-C100 high-performance concrete

This paper presents the compounding technology and application of C80-C100 high-performance concrete (HPC) containing ultra-pulverized fly ash composite (PFAC) and superplasticizer. The properties of C80-C100 HPC are also studied systematically. The experimental results indicate that this concrete has excellent workability, high strength, lower drying shrinkage, outstanding volume stability, durability, etc.     

Porosity of recycled concrete with substitution of recycled concrete aggregate: An experimental study

In this paper, we present the experimental analysis of samples of recycled concrete (RC) with replacement of natural aggregate (NA) by recycled aggregate originating from concrete (RCA). The results of the tests of mechanical properties of RC were used for comparison with tests of mercury intrusion porosimetry (MIP), in which the distribution of the theoretical pore radius, critical pore ratio, the surface area of the concrete, threshold ratio and average pore radius were studied at ages of 7, 28 and 90 days. The results showed some variation in the properties of the RC with respect to ordinary concrete. Porosity increases considerably when NA is replaced by RCA. Additionally, a reduction in the mechanical properties of the RC is seen compared with ordinary concrete when porosity increases.     

碾压混凝土坝施工进度与质量控制的新措施

碾压混凝土重力坝和拱坝由于连续施工的坝体混凝土体积大，施工期间需要采取较为严格的温度控制措施，而所采取的温控措施是否有效，目前尚没有一个能够用于实际施工过程的快速有效的评估方法和方式，不能根据已施工坝体内的实际情况来控制施工进度和质量。利用分布式光纤温度测量系统来快速地获得坝体混凝土内部的大量温度信息，进而实际标定温度仿真程序并通过标定过程模拟拟施工的连续碾压层，以检验其温控措施的有效性。通过坝体内部的温度、温度变化速率和梯度来达到实时控制坝体碾压上升速度、坝面和仓面养护、以及冷缝灌浆处理等目的。     

反井钻及其在我国水电工程的应用

本文介绍了反井钻这一新型的竖井和斜井开挖施工设备，以及该设备在国内水电工程中的应用。实践证明，在适当的地质地形条件下，反井钻比人工正井法、吊罐、阿里马克爬罐法都具有明显的优越性，值得在国内其它水电工程中推广应用。