广州地铁公——纪区间2#竖井支护优化设计

广州地铁公－纪区间2^#竖井原设计采用挖孔桩支护，费工费时，针对现场情况，经方案优化后采用喷锚支护，对所选方案进行了计算分析，并简要介绍了施工过程，结果证实此方案是可行的。     

注浆技术简介及其发展

从注浆的定义和分类、注浆材料、注浆设计、注浆效果的监控与检测等几个方面进行综合论述，同时介绍国内外注浆的施工方法及设备方面的若干新动向及发展趋势。     

土钉式挡土墙在公路设计中的应用

就土钉式挡土墙的由来,它与其它形式挡土墙相比的优缺点,以及其设计原理、适用情况等做一初步探讨.     

单向压力对Ni—Mn—Ga磁形状记忆合金马氏体相变的影响

采用电阻和应变测量的方法，研究了单向压力对Heusler合金Ni56.3 Mn19.3 Ga22.8 C1.6马氏体相变的影响．结果表明：在压力小于4．44MPa时相变温度随压力值的升高而降低，dT/dσ=0．648K／MPa，说明了一定的压力阻碍马氏体相变的发生，当压力大于点升高，其原因可能是压力超过了临界值而引发了另一种相变．实验结果符合Clausius—Claperon方程．     

出油阀偶件故障检测新法分析

针对出油阀偶件出现故障后残压、供油起始角等发生变化的情况，分析了出油阀密封性故障的原因，介绍了利用计算机诊断和检测发动机故障的方法，通过试验表明，该方法不仅是计算机动态检测出油阀偶件的故障的一种较好的检测方式，而且具有准确性高、检测速度快、检测数据利于保存等优点，为实现计算机不解体高压油泵检测出油阀偶件故障提供依据。     

细砂土填筑高填方

黑北公路七标段大填大挖较多，最大填高14m，最大挖深18m，且填方段多为填方利用细砂土，该种土质内摩擦角小，粘聚力小，沿线地质极为复杂，冻土，沼泽密布，给施工带来了极大的技术难题。     

Study on lift-up speed of aerodynamic compliant foil thrust bearings

Objective The experimental study on the lift-up speed of a new kind of compliant aerodynamic foil thrust hearings was performed on the multifunetional test rig established for testing the performances of foil gas bearings. Methods The lift-up speed of foil gas thrust hearing under given axial load was analyzed through the spectrum of axial displacement response in frequency domain. Results The test results indicated that the difference in the spectrum of axial displacement responses before and after lifting up of the rotor was obvious. After lifting up of the rotor, there were only larger components of rotation frequency and lower harmanie frequencies. If the rotor wasn＇t lift-up, there were also larger components of other frequencies in the spectrum. Conclusion So by analyzing the spectrum of axial displacement response, the results showed that the lift-up speed was about 1 860 rpm when the axial load was 31N.