建筑边坡锚杆验收试验剖析

锚杆挡墙、桩锚挡墙是建筑边坡工程中常见的支护结构型式,其中锚杆验收试验是建筑边坡工程验收的重要依据之一,受各种内外因素的影响,锚杆验收试验多流于形式。该文依据现行国家标准,阐述了锚杆验收试验中需注意的各种问题,可供施工单位、检测机构等工程技术人员参考。     

不同规范中锚杆验收试验对比分析

抗浮锚杆现已广泛应用到各种抗浮工程中,锚杆的验收试验是检验抗浮锚杆是否满足设计要求的关键性试验,但是现行相关规范中关于验收试验中对锚杆加载等级的规定尚不统一,这对锚杆验收试验的实际操作造成了一定的不便,所以在进行试验之前常常需要综合具体的工程实际来确定所参考的规范,为此提出一种方便可行方法来确定选取的相关锚杆验收试验规范是有积极意义的.现以南京某工程为背景,通过不同规范进行锚杆验收试验并进行对比分析,进而讨论如何在工程中选择更合适的锚杆验收试验方法.     

影响岩土锚固工程安全性的几个关键问题

描述了中国、美国、英国、日本等国的岩土锚杆标准中关于锚杆设计安全系数、验收试验及锚杆合格条件规定的合理性和必要性。揭示并分析了当前中国的某些岩土锚固工程安全系数偏小,缺少基本实验及降低验收试验标准所造成的严重危害。提出在锚杆验收试验中若出现不合格锚杆应增加验收试验锚杆数量,同时还对不合格锚杆承载力的可利用度判别及如何增补锚杆提出了意见和方法。这些工作都对提高岩土锚固工程的安全性起到重要作用。     

抗浮锚杆设计综述

文章阐述了抗浮锚杆设计的基本要求;介绍了抗浮锚杆设计的优化方法,包括抗浮水位的复核、锚杆抗拔承载力取值、锚植布置方式的比选;给出了抗浮锚杆设计完成后的验收方式,包括基本试验、验收试验和材料检验。     

东莞某商住楼基坑抗浮锚杆检测与分析

以某商住楼锚杆验收试验为案例,对锚杆检测技术进行系统分析,阐述了锚杆的作用机理及破坏形态,并总结了锚杆试验的技术重点及亟待解决的问题。     

预应力锚杆应用实例的验收试验

根据永安至宁化(闽赣界)高速公路A3合同段K18+540—K18+680路基右侧路堑边坡防护加固工程动态设计,简述了预应力锚杆在复杂地质条件下的应用,并就GB 50086—2001《锚杆喷射混凝土支护技术规范》中预应力锚杆验收试验的实际操作进行了阐述,着重叙述了预应力锚杆工程孔验收试验及计算过程,可为同类锚杆加固工程验收提供参考。     

锚杆(索)拉拔试验分析系统的开发与应用

锚杆(索)基本试验和验收试验在锚杆(索)工程中具有重要地位,传统人工手算试验荷载和分析试验数据费时费力,本文针对锚杆和锚索试验荷载计算和试验数据分析进行了锚杆(索)拉拔试验分析系统的开发.分析系统可计算相关试验各级荷载值、锚索拉拔补偿荷载、锚杆和锚索理论弹性变形、分析试验数据、作出试验Q-s曲线图.系统界面友好,分析结...     

建筑边坡锚杆检测试验研究

详细介绍了边坡锚杆抗拉拔试验的原理,对边坡锚杆检测相关规范的修订内容进行了研究,并结合实际工程检测项目,总结归纳了锚杆验收试验的具体要求及技术重点,对建筑边坡的锚杆检测具有一定的参考价值。     

杭州粉砂土地区某工程抗浮锚杆抗拔试验分析

结合杭州粉砂土地区某工程抗浮锚杆的抗拔试验,对锚杆抗拔验收标准进行了初步的探讨,建议对现行〈土层锚杆设计与施工规范〉第5.3.5条抗拔锚杆验收标准进行一定的改进,如对不同类型的锚杆应规定不同的验收标准,同时应增加锚头总位移验收标准,对锚头总位移的要求应根据工程实际情况由设计人员确定等.     

弯形端头抗浮锚杆拉拔检测施工技术

义乌世贸中心工程地下室裙房基础筏板共设置3628根抗浮锚杆(含182根验收检测锚杆),锚杆大部分间距1 500mm,锚杆端部弯钩长度接近700mm,因设计锚杆带有弯头,无法使用正常的试验工具,经采用套装组合工具式配件,发明了筏板抗浮锚杆抗拔检测试验组合式工具,解决了锚杆抗拔检测试验,供相关类似工程参考。     

浅析高速公路工程招投标中的最低评标价法

结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。     

Place-Making in Megaprojects in Melbourne

This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer.     

Pathogens in septage in Vietnam

Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l^− 1, and were detected in all septage sludge samples with an average of 16,000 ova l^− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage.     

新时期广东城市化的新特点

新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。     

在市场中实践在实践中学习在学习中进步--工程公司市场化进程的回顾与展望

近两年来，工程公司在提高市场竞争意识、推动市场化进程中做了大量工作，其中坚持走出去的方针是我们自我加压、推行加快市场化步伐的一个重要战略步骤。     

在加拿大经历严冬

正在加拿大旅居一段时间,感触极深的是这里冬季的严寒与冰雪。冷到什么程度?我所待的萨斯克彻温省,只要有寒流"光顾",白天户外零下三四十摄氏度就是"常温"。2014年2月份一次强寒流来袭,加上风寒指数,当地最低温度竟降至-80℃!记得去年圣诞节聚会,将汽车停在户外不过四五个小时,车轮竟生生冻在了地面上!加拿大的冷,不单纯体现在     

在开放中引进 在融合中发展——关于北京市大石窝镇产业优化升级的调查

大石窝镇是北京西南以大理石矿藏和石材产业闻名国内外的一个乡镇,"十一五"以来大石窝镇在开发中创新、在融合中发展,积极发展优势产业,不断探索和实践优势产业与文化创意产业融合、产学研一体化的路子,使镇域产业结构不断优化升级,开拓了一条别具特色的镇域经济发展道路。     

浅谈建筑施工临时用电安全

针对由于建筑施工临时用电安全管理的不完善和不规范操作而导致大量工伤事故频频发生的问题,为消除用电安全隐患,对建筑施工临时用电安全管理进行了归纳和分析,并提出了整改意见,以确保现场人员及电气设备的安全运行。     

Trends in ozone concentrations in Jerusalem

Ozone concentrations have been measured in Jerusalem since 1977 by a chemiluminescent ozone meter. During the last five years ozone levels have increased considerably. In order to test whether this increase reflected the growth in the number of motor vehicles or was caused by atmospheric conditions, the summer data of the last five years were analyzed. Ozone levels were characterized by the daily one-hour maxima; the atmospheric factors considered were temperature, insolation and stability. A multiple regression equation was computed and a correlation coefficient r = 0.77 obtained. The yearly mean reduced ozone levels showed a definite trend, which reflected the corresponding trend in the number of motor vehicles.     

九十年代北京建筑创作纵横谈

２０００年１２月１４日,原首规委办主任赵知敬召集北京市建筑设计研究院的部分著名建筑师就九十年代北京建筑创作风格的问题进行了座谈。以下是部分与会者发言摘要。（按发言先后顺序）