ENGINEERING ASPECTS OF LANDFILLING MUNICIPAL SOLID WASTE

ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｈｅｌａｓｔｄｅｃａｄｅｓ,Ｃｈｉｎｅｓｅｕｒｂａｎｐｏｐｕｌａ ｔｉｏｎｉｎｃｒｅａｓｅｄｒａｐｉｄｌｙａｓａｒｅｓｕｌｔｏｆｔｈｅａｃｃｅｌｅｒａｔ ｅｄｅｃｏｎｏｍｉｃｄｅｖｅｌｏｐｍｅｎｔａｎｄｕｒｂａｎｉｚａｔｉｏｎ .Ａｔｔｈｅｓａｍｅｔｉｍｅ ,ｔｈｅｅｓｔｉｍａｔｅｄｏｆｔｈｅａｍｏｕｎｔｏｆｍｕｎｉｃｉｐａｌｓｏｌｉｄｗａｓｔｅ (ＭＳＷ )ｇｅｎｅｒａｔｅｄａｎｄｃｏｌｌｅｃｔｅｄｐｅｒｐｅｒｓｏｎｐｅｒｄａｙｈａｓｂｅｅｎｇｒｏｗｉｎｇｙｅａｒｂｙｙｅａ…     

Transient response of piles-bridge under horizontal excitation

Moving ships and other objects drifting on water often impact a bridge's pile foundation. The mechanical model of the piles-bridge structure under horizontal forcing was established, and a time-domain approach based on Finite-difference Method was developed for analyzing the dynamic response of the piles-bridge structure. For a single pile, good agreement between two computed results validated the present approach. The slenderness ratio of the pile, the pile-soil stiffness ratio and the type of the structure influence the dynamic response of the piles-bridge structure. The computed results showed that the stiffness of the structure determines the dynamic response of the piles-bridge structure under horizontal forcing. Project (No. 001110442) supported by the Science and Technology Bureau of Zhejiang Province, China.     

极端气候与列车交通耦合作用对高速铁路路基长期服役性能的影响（英文）

作为全球关键交通基础设施,高速铁路承担着大量的运输任务。极端气候和列车荷载的耦合作用容易诱发各种路基病害,从而导致高速铁路事故频发,极大地影响了人们的出行安全。因此,研究极端气候与列车交通耦合作用对高铁路基长期服役性能的影响具有重要意义。本文总结了当前高铁路基长期服役过程中出现的路基病害类型,针对典型病害的研究现状、路基短期检测和长期监测技术以及路基病害的控制修复手段进行回顾,指出目前研究的不足,并为今后该领域的研究提供了一定的建议。     

Dynamic responses of a multilayer piezoelectric hollow cylinder under electric potential excitation

INTRODUCTION Recently, more and more investigations have been conducted on multilayer piezoelectric media. Kharouf and Heyliger (1994) and Heyliger and Ra- mirez (2000) dealt with the free vibration problems of laminated piezoelectric cylinders and discs, respec- tively. Chen (2000) considered the free vibration of (multilayer) nonhomogeneous piezoceramic hollow spheres by employing a separation formulation for displacements. Chen (2001) developed a state-space method for free vibration …     

Correlation of liquefaction resistance with shear wave velocity based on laboratory study using bender element

INTRODUCTION Evaluation of soil liquefaction resistance is an important aspect of geotechnical engineering practice, and several types of evaluating procedures have evolved over the last three decades. The well known “simplified procedure” originated by Seed and Idriss (1971) can be used to evaluate liquefaction resistance based on standard penetration test (SPT) blow counts. Over the years, the simplified procedure has been modified and updated with additional data, and has become th…     

多层中间覆盖层填埋场边坡滑移监测及稳定性分析（英文）

介绍某多层中间覆盖层填埋场边坡滑移过程的现场监测结果,包括渗滤液水位、表面水平位移和深层侧向位移.基于监测数据,开展稳定性分析,验证顶层降水、分层降水及近边坡区域降水的稳定控制效果.结果表明:最大滑移面积达到34 760m~2,第10平台的平均表面水平位移量为1.77m;近边坡区域的堆载是其失稳的主要原因;距堆载区越近,滑移程度越大,水位上升更显著;受中间覆盖层的影响,该类型填埋场的主要失稳模式是堆体内部的局部滑动;近边坡区域降水对其稳定控制效果明显.     

Transient response of piles-bridge under horizontal excitation

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｉｍｐａｃｔｏｎｐｉｌｅｓ ｂｒｉｄｇｅｓｔｒｕｃｔｕｒｅｓｂｙｍｏｖｉｎｇｓｈｉｐｓｏｒｏｔｈｅｒｄｒｉｆｔｉｎｇｏｂｊｅｃｔｓｏｆｔｅｎｄｅ ｓｔｒｏｙｓｔｈｅｂｒｉｄｇｅ,ｓｏｉｔｉｓｉｍｐｏｒｔａｎｔｔｏｓｔｕｄｙｔｈｅ     

Axisymmetric fundamental solutions for a finite layer with impeded boundaries

Axisymmetric fundamental solutions that are applied in the consolidation calculations of a finitecaly clay layer with impeded boundaries were derived. Laplace and Hankel integral transforms were utilized with respect to time and radial coordinates, respectively in the analysis. The derivation of fundamental solutions considers two boundary-value problems involving unit point loading and ring loading in the vertical. The solutions are extended to circular distributed and strip distributed normal load. The computation and analysis of settlements, vertical total stress and excess pore pressure in the consolidation layer subject to circular loading are presented. Project (No. 500117) supported by the National Natural Science Foundation of Zhejiang Province     

高校建设国家重大科技基础设施机制的探索与实践

国家重大科技基础设施具有科研和工程的双重属性,建设技术难度大、周期长。结合浙江大学建设超重力离心模拟与实验装置国家重大科技基础设施的实践,对高校建设设施的机制进行了初步探索,阐述了设施预研、组织架构、运行机制、管理制度等方面的建设内涵与成效,对促进高校提高设施建设水平具有借鉴意义。     

膨润土防水毯化学相容性对通过带缺陷复合衬垫中的渗流及污染物迁移影响的数值研究（英文）

目的：考虑膨润土防水毯（GCL）的化学相容性会影响带缺陷的复合衬垫中的渗流与污染物迁移。本文旨在探讨GCL的化学不相容性对复合衬垫的防污性能（衬垫底部的渗漏量以及污染物通量）产生的影响并分析导致这种影响产生的机理。创新点：1.采用逻辑斯蒂函数模型拟合GCL渗透系数与无机渗滤液中盐浓度之间的关系;2.在计算模型中引入GCL渗透系数与孔隙水浓度的耦合曲线,模拟了在考虑GCL化学不相容性条件下复合衬垫中的渗流与污染物迁移过程;3.采用计算过程中衬垫内各物理量的实时变化表征了GCL化学不相容性的影响机理。方法：1.通过数据收集、归纳与拟合得到GCL渗透系数在无机盐溶液中与溶液浓度之间的关系（图1和3,公式（5））;2.通过建立数值模型并引入GCL渗透系数与孔隙水浓度的耦合曲线,模拟在考虑GCL化学不相容性条件下复合衬垫中的渗流与污染物迁移过程,计算GCL化学不相容性对复合衬垫防污性能的影响大小（图5）;3.通过对污染物迁移过程中衬垫内的浓度、水头、流速以及通量分布的分析,得到GCL化学相容性影响衬垫性能的机理（图6～10）。结论：1.在评估带缺陷复合衬垫防污性能时,尤其是对于含高浓度无机阳离子...