石灰稳定类沥青路面结构模式分析

通过对郑州市常用的石灰稳定类沥青路面的裂缝调查分析、石灰稳定土的强度分析、破坏机理分析 ,阐述了郑州市这种道路结构的弊端     

深层搅拌桩在工业厂房基础工程中的应用

在工业厂房的建设中,由于特定的工艺流程通常会产生大面积的地面荷载,水泥土搅拌桩在大面积荷载地基加固中有自身的优势,有很强的工程可靠性,并有自身的经济优势。     

Estimation Method for Ground Settlements of the Karst Tunnel in Soil Surrounding Rock北大核心CSCD

Waterseepageofakarsttunnelsectioninsoilsurroundingrockispronetosurfacesubsidence.Considering the settlement caused by descending of water level due to water leakage, a method of surface settlement estimation under steady seepage of phreatic water was proposed. Based on the seepage and consolidation theory, the changes of dead-weight and seepage effective stress of soil unit in surrounding rock was analyzed in condition of water seepage, and the settlement zone of surrounding rock was divided by taking the funnel curve of precipitation as the boundary line. A two-dimension plane was established based on the excavation cross section and the estimation formula for surface settlement due to seepage effect was deduced by means of double integral. On the basis of Yaozhai tunnel of Liuzhai-Hechi Expressway in Guangxi Zhuang Autonomous Region, the surface settlement of soil surrounding sec⁃ tion was predicted by field measurement and formula estimation respectively. Facts and figures show that the mea⁃ sured values are mainly consistent with the estimation ones, while the measured values are larger than the estima⁃ tion ones within the scope 3 m away from the excavation face along the horizontal radial direction. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

土壤加固技术及其发展

提出并区分了土壤加固、土壤稳定和土壤固化的概念,得出土壤固化和土壤稳定既有区别,又有交叉重叠的部分,但它们都同属于土壤加固的范畴。综述了目前主要的土壤加固技术的方法、原理及其发展,包括机械力加固、热处理加固、化学加固、加筋加固和注浆加固。其中,化学加固中的土壤固化剂技术在近几十年发展迅速,有大量研究成果和工程应用;阐述了钙基类与非钙基类固化剂的种类、特点和加固机理,分析了新型非钙基类固化剂应用现状及其原因;介绍了生物注浆加固技术的方法和原理。     

钢桥稳定设计的探讨

该文简要介绍钢桥稳定设计中的一些基本概念,如强度和稳定的区别,稳定类型,钢桥稳定的设计原则以及钢桥设计的一些特点等,以便帮助设计人员更好地进行稳定设计。     

川中地区稳定土路面基层材料强度特性试验研究

研究了川中地区石灰稳定土、水泥稳定土和石灰粉煤灰稳定土基层 (底基层 )的抗压强度、劈裂强度、抗压回弹模量和强度增长规律 ,在此基础上 ,提出了适合于川中地区土质的三种稳定土基层 (底基层 )材料组成及材料设计参数值     

洋山深水港区一期工程深水裸露基岩嵌岩桩施工技术

文章通过计算，优化方案，采用人造基床作为钢套筒稳桩措施，解决了上海国际航运中心洋山深水港一期工程中码头嵌岩桩的难题。文中还对嵌岩桩施工中的钻机平台、成孔成桩、异常情况处理等作了简单总结。实践证明，人造基床方案是可行的，在施工进度、工程质量及经济上都有较大的优势，具有推广的价值。     

A design for ship stabilization by activated antiroll tanks

An activated antiroll tank system design for ship roll reduction was investigated. Considering the dynamics of the ship motion, tank flow, and variable-pitch impeller, a control law is derived based on optimal control and estimation theory. Finally, a series of numerical computations for a 1174 tonne ship without an antiroll tank system, with a passive tank system, and with the proposed activated antiroll tank system is performed. The results show that the proposed activated tank system has superior antiroll properties for free rolling, regular, and irregular sea loads to the passive tank system. In addition, this design has a very low sensitivity to variations in ship and tank dynamics. It shows that the proposed system is reliable and valid for practical use.     

提高土方机械对土壤作业能力的探讨

分析了影响作业能力的主要因素及其力学物理过程，在此基础上，探讨了提高土方机械对土壤作业能力的途径与方法。     

机车牵引电机电器故障可靠性分析系统

介绍了在Ｗｉｎｄｏｗｓ ９８下开发的机车牵引电机、电器故障可靠性分析系统的设计方法和实现技术，主要包括系统目标、系统设计及实现中的几项关键技术。