广州某河涌整治工程基坑支护施工技术分析与处理

介绍广州某河涌整治工程，按原施工方案进行基坑开挖施工时，出现混凝土管桩水平位移和断桩问题后，进行修改和补充，使混凝土管桩在水平方向的位移得到有效控制，可供同类型结构工程施工时参考．     

基于岩土工程的矿山施工基坑支护稳固设计及应用

基坑支护设计在岩土工程矿山施工基坑中起到稳定工程质量的关键手段,在整个矿山基坑作业中尤为重要,现场施工过程中必须要予以重视。尤其是在软质岩石结构条件下施工,必须要保证矿山工程基坑支护设计质量符合岩土工程的施工要求。本文首先对矿山基坑支护设计的重要性和原则进行相应的阐述,从而提升岩土工程质量。     

现场监测在深基坑开挖及支护工程的应用

论述了现场监测在深基坑工程中所发挥安全预警作用，对信息化施工的指导作用以及支护结构设计的验证和完善作用，展望了在新兴的基坑工程信息化监控设计与施工中，现场监测的重要意义和相关的要求。     

PHC长桩顶部大幅度位移的事故分析与处理

介绍了某不锈钢热轧工程在加热炉基础基坑开挖过程中发生犬面积PHC长桩桩顶位移和境底土体失稳事故的情况和原因分析，以及事故处理措施。可供同类工程设计、施工参考。     

埋头抗拔桩承载力静载检测分析

随着大型基础施工进度和地层限制等要求的提高,抗拔桩先于基坑开挖施工而成为埋头桩逐渐成为发展趋势。伴随着基坑开挖产生的大面积卸荷,埋头抗拔桩的受力状态和极限承载力将产生重大变化。通过对现场施工埋头抗拔桩的静载试验,探索深埋抗拔桩承载力的现场检测方法,记录3种埋头深度抗拔桩的上拔荷载—上拔量变化过程,确定抗拔承载力极限值及上拔位移量,分析基坑开挖卸荷后不同埋深抗拔桩的力学特征及产生原因。研究成果可为埋头抗拔桩工程设计和规范修订提供参考。     

淮安雨润中央新天地国际购物广场基坑工程抽水试验数据的分析与研究

对拟建雨润中央新天地国际购物广场工程现场实际水文地质情况进行抽水试验研究,取得准确水文地质参数,降低基坑工程设计和施工风险。该抽水试验对基坑基坑涌水量估算和降水井的布设研究,为降水运行提供依据,对类似工程的设计、施工及风险控制具有十分重要参考价值。     

基于岩土工程的矿山施工基坑支护稳固设计及应用

由于我国地质类型较为复杂,岩石工程矿山在施工过程中受自身地形等限制因素的影响,增加岩石工程矿山施工的风险,诱发安全事故。在矿山岩石工程开采施工中,基坑工程施工是基础施工环节,随着我国矿山开采的难度逐渐加深,矿山施工中岩石工程基坑施工对技术水平的要求逐渐加深。因此,为了保证岩石工程矿上开采后续工作能够稳定有序,加强矿山基坑岩石工程施工质量是必要的。基坑工程支护稳固技术在我国应用的非常广泛,在提升基坑稳定性中发挥着重要作用。基于此,本文以矿山基坑岩石工程施工中支护设计的重要性以及需要遵循的基本原则为着手点,简述影响矿山岩石工程基坑支护工程施工质量的因素,分析当前岩石工程基坑支护施工技术中存在的问题,探究当前矿山基坑支护工程施工的技术手段,并出提出矿山基坑支护工程稳定性设计的对应措施。     

悬臂桩支护基坑开挖对邻近埋地管线的影响

采用MIDAS GTS软件建立了三维有限元模型,分析开挖深度、桩径、桩心距、管线与桩的距离、管线埋深、土体弹性模量等因素对地埋管线的影响.结果表明:管线水平和竖向位移在基坑角点处约为基坑中部的1/2;管线埋深在基坑深度1/3位置时,水平位移最大,而竖向位移随埋深的增大而减小;当桩径由0.6 m增大到1.2 m时,水平位移变化较小,管线中央竖向位移则减少为原来的1/2;土体弹性模量增大时,管线中间位移明显减小,水平位移约为竖向位移的4倍.      

1880热轧带钢工程加热炉区深基坑围护及土体位移有限元分析

软土地基深基坑开挖过程中,由于降水质量、基坑围护不同,或者土方开挖工况选择不当,常会引起土体位移,对管桩产生较大的土压力,出现基坑滑坡、桩身偏斜等质量事故,特别是大面积群桩整体位移,对工程本身将造成较大的经济损失和工期延误.采用桩土共同建模,桩土单元之间位移协调的有限元方法,将桩土单元集成总体刚度矩阵整体分析,对宝钢1880热轧带钢工程加热炉深基坑开挖过程进行研究,对比计算了基坑开挖对土体侧移和土体应力分布的影响,对施工工况的设计具有参考作用.     

矿山工程深基坑支护中的注浆施工工艺研究

基坑围护是工程基坑施工中重要的组成部分,需要严格执行施工流程,保证施工质量。矿山工程深基坑设计与施工,既要保证整个维护结构在施工过程中的安全性,又要控制基坑结构防止周围土体发生变形,以保证矿山工程施工顺利开展。注浆支撑是目前一种新兴的基坑支护技术,以其施工便捷、成本较低等优势迅速得到广泛的应用。本文将以矿山工程基坑施工为例,着重阐述前撑式注浆钢管支撑的施工流程,并针对其优势进行分析,以期可以为同行的工作提供一点参考。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。