散货堆场深厚软基加固中塑料排水板耐久性的探讨

对于铁矿石、煤炭等散货堆场深厚软基加固,采用塑料排水板和使用期分级加载方案时,其时间跨度大,应考虑塑料排水板的排水性能耐久性问题,以确保加载期间塑料排水板的排水性能.使实际的地基排水固结状况符合设计计算模型.通过对不同塑料排水板材质、结构、生产工艺的对比,分析了塑料排水板耐久性的影响因素.提出在散货堆场软基加固中,当时间跨度大时应采用耐久性塑料排水板的观点.     

轿车安全带优化设计及模拟计算

安全带中限力器、预张紧器、织带的性能参数是影响车辆安全带系统约束性能的主要因素。采用正交试验设计法，选取织带伸长率、预张紧器开始动作时刻、限力器恒力值以及在该恒力作用下织带的拉出长度为主要因子，提出了安全带优化设计方案。应用MADYMO分析软件建立的模拟计算模型，并提出了夏利7100型轿车的安全带系统优化参数方案。     

芜湖港煤炭码头皮带机控制系统研究

结合芜湖港煤炭码头皮带机联锁控制系统的设计,在阐述整个系统的工艺流程的基础上,研究了系统的控制方式,实现了基于软启动的多条皮带机启动与控制,并且各条皮带机之间相互联锁.     

振动减速带的速度控制效果研究

车速是影响道路交通安全的一个重要因素,提高速度控制技术的功效,对于改善道路安全性具有重要的意义。文章通过对振动减速带的车辆速度进行观测和分析,评价了速度控制设施的减速效果。     

高效抗裂型防水剂在铁路桥涵工程中的应用

沈阳市南五马路公铁立交桥工程框构桥混凝土等级高(C40)、体积大(共7000m3),钢筋绑扎密度高,且工点位于市内。该桥混凝土采用商品混凝土泵送技术,因此混凝土的坍落度比较大,这使混凝土由于干缩及冷缩的作用极易产生收缩开裂,最终可导致钢筋锈蚀,影响结构受力。在施工中使用WG-H     

CAT技术在货车空重车自动调整装置试验台上的应用

利用VB6 0编程语言实现了KZW -4型货车空重车自动调整装置试验台的改造 ,阐述了该试验台CAT系统的工作原理、结构型式及其软、硬件设计 ,实现了试验测试的自动化     

用于清管器收发球简上的新型快开门

介绍了一种适用于大口径、高压力管道用清管器收发球筒上的快开门机构.该快开门机构称为锁带嵌入式快开盲板.由直接承压部件(法兰型筒体及盲板盖)及其上的快速锁带收紧装置、安全卸压装置、特殊形式的密封圈及连接盲板盖与筒体的可微调转臂构成.该装置设计合理、动作灵活、操作简单、安全可靠,目前已少量生产并投入运行.     

水库地质问题浅析

本文根据详实的资料,从大地构造单元上论证了白石水库工程地质问题的一个方面——水库诱发地震的可能性问题。在评价中,结合岩石(体)试验数据从微观上进行说明。     

Reduction of capacity and projected costs associated with seat belt installation on school buses

This study examines the potential effects the installation of seat belts on school buses would have on the fleet capacity in Alabama and the resulting cost implications. The study also documents the myriad research studies and professional opinions offered on the potential safety effects of equipping school buses with safety restraints/seat belts. Four seat configurations for the school buses were analyzed. The first configuration represents the most common current bus seating configuration without seat belts, 3 seats on each side of the aisle and 12 rows (3/3-12). The physical space required for seat belt hardware may result in a loss of a row of seats and may reduce the number of students seated per row. Thus, three more configurations were studied: loss of a row of seats (3/3-11), loss of one seat per row (3/2-12), and loss of both a row of seats and a seat per row (3/2-11). The capacity for each configuration for each bus using current pupil loads was determined. The costs associated with installation of seat belts, and purchase and operation of new buses were obtained. Should school bus seat belts become mandatory in Alabama, the results obtained in this study can be used by any school system to determine the optimum configuration for their pupils, which will identify the number of additional buses that must be purchased by the school system. This study found that many of the buses that would become overloaded due to seat belt installation and the resultant loss of seating will be carrying only a few excess pupils. Transportation supervisors may be able to handle such overloads by transferring these pupils to other buses or by adjusting their bus routes to minimize purchase of new buses. Additional suggestions for handling bus overloads were offered in the body of this report.     

塑料排水板打设“回带”的解决措施

在真空预压加固软土地基过程中,由于吹填过程中泥质散布和沉积的复杂性,使浅层地基加固区的排水板与泥层底部相互间的摩擦力过小,从而造成土体不夹带,引发"回带"现象。通过力学平衡计算和工程实践,采取振动法、注水法、桩靴改造法等改变排水板底部板头结构或增加负载物的措施,有效解决浅层地基加固区塑料排水板打设"回带"的现象,提高塑料排水板打设质量和效率。