HDPE土工膜在北京六里屯垃圾卫生填埋场工程中的应用

以北京市六里屯垃圾填埋场工程为例，介绍了HDPE土工膜在垃圾填埋场工程中的应用，主要包括垫衬系统的设计和安装。     

潮州生活垃圾填埋场防渗膜的选材与施工

介绍潮州市锡岗生活垃圾卫生填埋场防渗膜(HDPE土工膜)的选用、铺设、焊接和检测,以及施工技术要点和质量控制措施。     

热带地区城市垃圾填埋场防渗施工技术

以斯里兰卡科伦坡城市固体废弃物处理工程为依托,对垃圾填埋场防渗技术进行研究,并对膨润土垫和HDPE土工膜施工技术、施工存在的问题及控制要点进行阐述。工程应用表明,膨润土垫+HDPE土工膜+压实防渗黏土的复合防渗衬垫系统防渗效果良好。     

HDPE膜在生活垃圾填埋场中应用

通过对几种人工合成材料的比较,阐述了高密度聚乙烯(HDPE)土工膜在生活垃圾填埋场防渗层中应用的优越性。结合HDPE土工膜渗透系数小、抗老化等一系列物理力学特点,同时,考虑到国家的现行规范J122-2001,论述了生活垃圾填埋场中HDPE土工膜的选材设计、厚度确定、强度要求以及渗透量估算等设计方面的问题。施工失误或垃圾堆体不均匀沉降,会使HDPE土工膜产生破坏。     

浅析HDPE防渗膜在填埋场的施工应用

通过HDPE防渗膜在生活垃圾填埋场中的应用,介绍了HDPE土工膜的施工工艺流程,HDPE膜的铺设安装要求及HDPE特殊部位的处理方法,探讨了HDPE土工膜的焊接程序及要求,以推广HDPE防渗膜的应用。     

HDPE土工膜端部张拉力的大规模实测数据分析

 垃圾填埋场边土工膜主要受到温度应力和垃圾压缩引起的张拉力的作用，为评价垃圾填埋场防渗系统中高密度聚乙烯(HDPE)土工膜的温度应力和垃圾填埋压缩引起的端部张拉力，以短纤维无纺布、HDPE土工膜组成防渗系统，进行大规模现场试验。试验结果表明：伴随环境温度的下降，HDPE土工膜中产生温度应力，当填埋高度较小时作用在HDPE土工膜端部的张拉力主要为温度应力；随着填埋高度的增加，压缩引起的HDPE土工膜端部张拉力增大。用有限元算法对压缩引起的端部张拉力进行分析，并采用温度与HDPE土工膜张拉力的关系对温度应力进行分析。计算结果与实测结果的对比情况表明，考虑填埋压缩引起的张拉力的应力松弛后计算结果更加接近实测结果。     

垃圾填埋场工程防渗技术的设计与施工

浙江省仙居县生活垃圾填埋场工程设计选用的主要防渗材料包括天然黏土和人工合成土工膜防渗衬层等。介绍了该工程主库区、封场覆盖、调蓄池、渗沥液导排系统和垃圾挡坝工程的防渗结构设计,以及GCL土工聚合黏土衬垫与HDPE土工膜的关键施工技术。     

HDPE土工膜在垃圾填埋场工程中的应用

结合工程实例,从HDPE土工膜材料的选用、施工步骤及技术要点、施工注意事项等几个方面,介绍了HDPE土工膜在生活垃圾填埋场工程的应用情况.     

某生活垃圾填埋场土工防渗膜铺设及焊接施工要点

介绍佛山高明苗村白石坳生活垃圾卫生填埋场防渗漏（HDPE土工膜）接缝的焊接施工技术，以及铺设过程中的质量管理措施，四新技术的应用等，该经验值得在同类工程中推广应用。     

HDPE土工膜温度应力的试验研究

为了评价垃圾填埋场防渗系统中HDPE土工膜的温度应力,对短纤维无纺布和HDPE土工膜组成的防渗系统进行了模拟试验.试验结果表明,HDPE土工膜的温度应力随环境温度的变化而变化,当环境温度下降时将导致HDPE土工膜收缩产生温度应力.同时利用温度与HDPE土工膜弹性模量的关系对温度应力进行分析,计算结果与实测结果比较接近.     

关于规划信息标准化建设的若干思考

系统应用与信息管理的需要、数据共享与交换的需要、信息多样化与多源化的需要是规划信息标准化的内在动力.规划信息标准化建设应按信息的空间性和时间性的强弱来确定实施等级,建立规划信息共享与交换标准、规划成果综合验收机制、规划数据质量评估体系和规划信息价值评估体系.     

面向率先现代化的昆山城市可持续发展战略思考兼谈花桥发展定位

文章首先分析了长三角区域发展新趋势,然后在系统研究昆山可持续发展瓶颈的基础上,确定面向现代化的昆山城市发展战略,包括产业转型升级战略、集约化发展的空间利用战略、交通引导发展战略、资源节约与环境保护战略。最后,从昆山城市可持续发展的视角论及花桥发展定位。     

混凝土桥梁结构耐久性设计探讨

进行了混凝土桥梁耐久性设计病害原因分析,探讨了混凝土桥梁设计耐久性构造措施,提出了保证桥梁耐久性的一些设计原则,以引起人们对桥梁耐久性的重视,从而延长桥梁的使用寿命。     

Probabilistic models for mechanical properties of concrete,reinforcing steel and pre-stressing steel

This paper presents probabilistic models for mechanical properties of pre-cast and cast-on-site concrete as well as of reinforcing and pre-stressing steel. An extended review of models available in the literature is made and new probabilistic models are developed based on a significant amount of data collected by the authors. New probabilistic models are proposed for concrete ultimate strength (separately for precast and cast-in-place concretes), for yield and ultimate strength of reinforcing steel and for proportionality limit and ultimate strength of pre-stressing steel. The new models account for a recent improvement of production and are more appropriate for the probabilistic assessment of modern concrete structures then the models available in the literature.     

贯彻执行建设工程消防监督管理规定的思考

对新修订的《建设工程消防监督管理规定》(公安部令第119号)中涉及规划许可和施工许可的部分进行归纳,对规定适用范围的扩大进行解释,旨在理清法律、法规中对需要办理建设工程规划许可证的工程、需要城乡规划主管部门批准的临时性建筑、需要住房和城乡建设行政主管部门进行施工图审查的工程、不需要取得施工许可的建设工程等的具体要求,明确民用建筑外保温材料监管的重要性,为新《建设工程消防监督管理规定》的执行提供参考。     

Meteorological Database for the United States

Abstract A meteorological database for the 48 contiguous states of the United States has been developed for use in indoor air pollution predictive models. The database contains predicted typical monthly meteorological statistics at the county level derived from hourly meteorological data from 208 (234 for precipitation) geographically distinct monitoring stations. Interpolation and extrapolation techniques were used to predict statistics for counties not containing a meteorological monitoring site. The LBNL database includes statistics for meteorological variables including dry-bulb temperature, dew-point temperature, barometric pressure, wind speed, wind direction, hours of precipitation, precipitation, and derived infiltration degree-days. The database consists of individual files of derived statistics for each weather variable and is potentially useful for indoor radon modeling as well as for other purposes. Each file contains data values for all 12 months and an aggregation of the 12 months up to a yearly statistic for all county centroids. A test was conducted to assess the quality of interpolated values. Examples showing the use of the database for mapping infiltration degree-days and an application of the database to a statistical correlation analysis attempting to find meteorological factors influencing indoor radon levels in the United States are discussed.     

State of technology for renewal of sewer force mains

This paper presents the results of a review of the state of technology for renewal of force mains. Force mains are critical components of many sewer collection systems with significant environmental and cost consequences for failure. The review identified several needs, including the need for rational and common design approaches for rehabilitation systems, quality assurance/quality control procedures, and better practices for operation and maintenance. The difficulty in assessing the condition of sewer force mains, leaving many owners with questions about the integrity of their systems, and the limited amount of technologies available for renewing a deteriorated main, has limited the amount of renewal work in the past. Most of the renewal activity has involved complete replacement of the force main. As the nation's force mains age further, greater emphasis must be placed on finding cost-effective ways to renew these critical assets. Fortunately, new products and technologies are now emerging for condition assessment, as well as rehabilitation. Some newer methods developed for gravity sewers and water distribution systems are being adapted for use in force main rehabilitation but design and performance data gaps remain to be filled.     

砌块车间设计

结合环保工作和国家墙体材料改革的需要,对砌块车间的设计与环境理念进行了阐述,并对该车间的平面、立面设计要点进行了论述,归纳了砌块的生产工艺流程,最后指出了工业厂房的建筑设计和发展方向。     

阳朔县游憩商业区用地规划调整探讨

阳朔县RBD用地规划调整主要根据旅游市场和旅游产品规划进行。用地规划调整采取以下措施：将现状9大类用地类型改为7大类,取消与旅游无关的工业用地和对外交通用地;减少行政办公用地面积;在桂花街以北地块上增加国际文化交流中心用地;在蟠桃路和西街交汇处增加外事停车场用地;恢复水面用地,增加又物古迹用地;增加广场用地;减少市场用地,医疗卫生用地和其它用地的面积。     

综合办公楼设计的优化应对方案

该文主要介绍了某综合办公楼在设计过程中各个专业的设计重点和难点,如建筑专业的总图、平面、立面设计;结构专业如何处理大跨度空间的楼板设计;给排水专业如果确定供排水的方案;电气专业如何确定系统的负荷;暖通专业如何对比选择冷热源形式等。