大直径钻孔施工掉钻事故的处理及预防

分析了大直径钻孔施工中掉钻事故的各种原因及特点,结合工程实践,介绍了处理孔内掉钻事故的一些方法及预防孔内事故所采取的措施.     

尼姆达病毒的特征及清除方法

介绍尼姆达病毒的特征、传输途径、清除方法和防范措施.     

White spot syndrome virus envelope protein VP124 involved in the virus infection

White spot syndrome virus （WSSV） is one of the major shrimp pathogens causing large economic losses to shrimp farming. In an attempt to identify the envelope proteins involved in the virus infection, purified WSSV virions were mixed with three antisera against WSSV envelope proteins （VP39, VP124 and VP187 ）, individually. And then they were injected intramuscularly into crayfish （Procambarus clarkii） to conduct in vivo neutralization assays. The results showed that for groups injected with virions only and groups injected with the mixture of virions and antiserum against VP124, the crayfish mortalities were 100% and 60% on the 8th day postinfection, individually. The virus infection could be delayed or neutralized by antibody against the envelope protein VP124. Quantitative PCR was used to further investigate the influence of three antisera described above on the virus infection. The results showed that the antiserum against VP124 could restrain the propagation of WSSV in crayfish. All of the results suggested that the viral envelope protein VP124 played a role in WSSV infection.     

虾蟹混养塘中WSSV对三疣梭子蟹(Portunus trituberculatus)致死效应的定量研究

采用实时荧光定量PCR法,在对白斑综合症多发的虾蟹混养塘内三疣梭子蟹体内病毒含量进行定量跟踪检测的基础上,结合电子显微镜及病理切片,对室内经口服、注射两种回感模式处理已感染白斑综合症病毒的濒死三疣梭子蟹体内病毒含量进行实验验证,并观察其体内主要器官组织的病理改变。结果表明,受白斑综合症病毒感染的三疣梭子蟹存活与死亡取决于蟹体内病毒含量,当病毒含量≥109拷贝/ml时均进入濒死或死亡阶段,其主要器官组织均有明显的病理改变。     

钢筋笼上浮事故的分析与预防

钢筋笼上浮事故的分析与预防程兰松（冶金部华东勘基公司·安徽铜陵·２４４００８）在大口径钻孔灌注桩的施工中，常常遇到钢筋笼上浮这个问题，尤其是在笼的桩基中，这种现象出现得更为频繁。无论在多大口径的桩基施工中，一旦发生钢筋笼上浮，轻则增加了施工难度，降低...     

省国土资源厅预防职务犯罪取得实效

近日，省人大预防职务犯罪检查组对省国土资源厅贯彻落实《黑龙江省预防职务犯罪工作条例》情况进行了检查，并给予充分肯定。     

钻孔灌注桩施工中埋管断桩事故原因分析及防治

从人、机、料、法、环5个方面分析埋管事故发生的原因,对导管受力进行了分析.混凝土流动性是导致埋管事故发生的主要原因,严格控制导管埋深是预防埋管事故的主要方法,"勤测、勤提、勤拆"是控制埋深的基本原则,"快"是灌注操作的核心.     

乐山市地质灾害区划

作者参加乐山市10年减灾规划,重点调查地质灾害,确定出崩塌、滑坡、泥石流、土壤盐碱化、下湿田和地面塌陷等灾种。在综合自然条件、社会经济、受灾损失等实际情况之后,再参照《四川省泥石流、滑坡危害程度评分标准》,对乐山市地质灾害进行了分区,将该市的地质灾害划分为2个区、5个亚区和9个地段。对各地段存在地质灾害隐患与危害程度均作了简要说明。