锤击桩基动测的导纳谱研究

本文从集中参数模型入手，讨论了单自由度和多自由度振动系统的导纳谱形式与特征，给出了完整桩与各种缺损桩的导纳振幅谱判断依据及计算处理方法，为导纳谱法在实际中的更好应用提供了理论说明。     

某桩基事故分析谈桩型的合理选择

文章通过对某工程实例的分析,说明建筑物桩基形式的合理选择,必须综合考虑设计要求、场地工程地质、水文地质的具体情况以及施工设备、工艺的适应性,才能确保桩基工程质量并最终节约建筑成本.     

边坡治理中的植物固坡法

植物固坡法是近年来国际上越来越流行的一种边坡治理方法。本文阐述了植物固坡法的基本原理和作用机理，介绍了当前国内外植物固坡工程的一般施工流程，对镇江市的边坡治理提出了建议，最后对植物固坡法的应用前景作了分析。     

Effect of compressible parameters on vertical vibration of an elastic pile in multilayered poroelastic media

This paper mainly investigates the influences of compressible parameters on the vertical vibration of a pile embedded in layered poroelastic soil media. The pile is treated as a 1D elastic bar by the finite element method, and fundamental solutions for the layered poroelastic soils due to a vertical dynamic load are obtained by the analytical layer element method. Based on the compatibility conditions, the pile-soil dynamic interaction problem is solved. The numerical scheme has been compiled into a Fortran program for numerical calculation. Influences of the pile-soil stiffness ratio, compressible parameters, vibration frequency and the soil stratification are discussed.     

中山市河涌水体及污水处理厂中 合成麝香的分布规律

对中山市5个区域的48条主要河涌水体与2间污水处理厂各工艺流程水体进行样品采集,运用固相微萃取进行前处理并结合气相色谱—质谱联用技术,检测各样品中佳乐麝香、吐纳麝香和酮麝香这3种合成麝香的含量,并分析其分布特征以及探讨污水处理厂处理工艺中合成麝香的浓度变化规律。结果表明：1）合成麝香已经普遍存在于中山市的河涌水体中。中山市西部地区和南部地区的河涌水体中合成麝香总含量相对其他区域最低,中部地区河涌水体中合成麝香含量亦较低。2）中山市雁企涌和魁魁涌等28条河涌水体中的主要合成麝香为佳乐麝香,一埒涌和乌沙涌等13条河涌水体的主要合成麝香为酮麝香,仅有苏埒涌和石军涌等7条河涌水体的主要合成麝香为佳乐麝香和酮麝香这2种合成麝香。3）氧化沟和A2/O工艺均能对合成麝香产生一定的去除效果。污水处理厂A对佳乐麝香、吐纳麝香和酮麝香的去除率分别为86.94%、72.15%和89.36%;而污水处理厂B对以上3种合成麝香的去除率分别为82.09%、85.73%和87.90%。4）2间污水处理厂的二沉池以及污水处理厂A的紫外消毒亦可对合成麝香产生进一步的去除效果;2间污水处理厂均能对酮麝香产生比佳乐麝香和吐纳麝香更高的去除率。     

干振碎石桩复合地基处理及其效果

干振碎石桩是处理松软地基土的一种行之有效的方法，它是挤密桩的一种。新乡市地方铁路处仓库场地经干振碎石桩地基处理后，桩间土密实度有明显的提高，液化指数大幅度降低，复合地基承载力相应提高，满足了设计要求。     

支盘桩抗压和抗拔特性的研究

在前期研究的基础上,分析了支盘桩高承载力和低沉降量的内涵。通过分析得出:在轴向压力作用下,支盘承受较大的荷载,支盘力占总荷载大约60 %以上,说明在承力上,支盘力控制着单桩承载力和沉降量的大小。在抗拔方面,由于支盘上方土阻力的作用,使支盘桩的抗拔力大幅度提升。     

层状地基中群桩水平振动

在考虑地基土分层的基础上,采用动力Winkler地基模型模拟桩土相互作用并运用传递矩阵,求解层状地基中的单桩和群桩的阻抗函数.在计算动力相互作用因子时考虑了被动桩与土的相互作用.最后将相互作用因子和群桩阻抗的本文解与精确解进行对比,验证了本文方法的有效性.     

Survey of waste water disposal practices at Antarctic research stations

To inform the future practices to be employed for handling waste water and grey water at the Swedish Antarctic station, Wasa, in Dronning Maud Land, the Swedish Polar Research Secretariat took the initiative to survey the practices of the 28 nations with stations in Antarctica. A questionnaire was sent out to all members of the Antarctic Environment Officers Network during the autumn of 2005. Questions were asked about the handling of waste water and grey water, the type of sewage treatment, and installation and operational costs. The response to the questionnaire was very good (79%), and the results showed that 37% of the permanent stations and 69% of the summer stations lack any form of treatment facility. When waste water and grey water containing microorganisms are released, these microorganisms can remain viable in low-temperature Antarctic conditions for prolonged periods. Microorganisms may also have the potential to infect and cause disease, or become part of the gut flora of local bird and mammal populations, and fish and marine invertebrates. The results from 71 stations show that much can still be done by the 28 nations operating the 82 research stations in Antarctica. The technology exists for effective waste water treatment in the challenging Antarctic conditions. The use of efficient technology at all permanent Antarctic research stations would greatly reduce the human impact on the pristine Antarctic environment. In order to protect the Antarctic environment from infectious agents introduced by humans, consideration should also be given to preventing the release of untreated waste water and grey water from the smaller summer stations.     

灌注桩结合三轴止水及内支撑的基坑围护设计

深基坑是一项理论复杂,学科综合性较高及风险较大的工程。工程中经常出现支撑体系失稳、围护结构失稳、坑壁漏水、坑底隆起等现象。以上海某深基坑工程为对象,分析了深基坑围护方案的选型要点,总结了深基坑围护设计中关键的计算与验算内容。最后对比分析了设计计算结果与实际监测数据结果,证明了所采取的围护形式的有效性,希望能为今后类似工程提供一些借鉴和参考。