砖混结构墙体裂缝的分析与防治

房屋墙体裂缝的产生给人们造成了很大经济损失及心理压力,由于地基不均匀下沉、温度变化和施工质量、使用材料的影响,使砖砌墙体表面产生一些形状不规则、宽度不等的裂缝,特别是在地震及其他荷载作用下,容易引起提前破坏.本文作者就这三方面的原因阐述了墙体裂缝产生的原因及防范措施,旨在减少和防止裂缝的发生     

墙体裂缝产生的原因分析研究

主要阐述了产生墙体裂缝的三种主要原因,地基不均匀沉降、温度变化及大梁处的墙体裂缝发生的原因、形成及预防措施。     

砖混住宅顶层墙体裂缝的受力分析与防治

文章对砖混结构墙体裂缝向题进行了温度应力、地基不均匀沉降、砌体温度、变形等若干项分析,并针对墙体裂缝提出有效的防治措施。     

地基不均匀沉降和温度变化引起墙体裂缝的防治

本文分析了混合结构房屋由于地基不均匀沉降和温度变化引起墙体裂缝的原因,提出了在混合结构房屋设计和施工中为了防止墙体裂缝应采取的措施.     

多层建筑承重墙体裂缝处理

承重墙体出现裂缝的原因是多方面的，本文针对墙体冻胀及地基不均匀沉降使墙体产生裂缝，结合三项工程实例。说明裂缝处理的施工过程及采取的补墙方法，并收到了良好的效果。     

浅析砖混结构裂缝的成因和防治

在分析由于地基、基础和砌体设计、砌体施工、温度变化等因素产生的砖砌体裂缝,以及混凝土硬化和在较高温度下失水收缩、支座处负筋下沉造成混凝土现浇板裂缝的基础上,提出了针对性的防治措施。     

多层房屋地基沉降的原因分析与防治措施

根据地基沉降引起房屋下沉开裂的建筑通病问题，提出在实际工程中应如何防治此类裂缝的几点看法。     

地下室墙裂缝成因及其防治

高层建筑地下室的渗漏总是施工中的一种通病 ,而地下室外墙是最易发生渗漏的部位 .根据多年的施工经验 ,将地下室渗漏成因及其防治总结如下 .1　裂缝的成因( 1 )墙体外墙混凝土浇筑后 ,由于水化热升温冷却后收缩 ,而墙体受地基混凝土底板外部结构的约束 ,使墙体混凝土内部出现较大拉应力而导致墙体裂缝出现 .( 2 )混凝土内部的毛细孔裂缝 .( 3)外加剂的掺量不够及养护不及时 .( 4)墙体钢筋间距太大 ,不利于限制裂缝产生 .( 5)施工中未采用低水化热水泥 .2　裂缝的防治( 1 )地下室墙体施工中 ,在底板和墙板上设置贯通的后浇带作为临时收缩缝 …     

混合结构墙体裂缝的质量问题分析

本文着重指出了混合结构墙体由于地基不均匀沉降和温度应力而引起墙体开裂的各种情形 ,具体分析了裂缝的特征 ,并提出了预防措施。     

注浆加固处理地基在某厂房的技术应用

某厂光伏研发、生产车间在投入使用不到6个月时间里,厂房地面沉降,墙体出现裂缝,且裂缝发展渐趋于扩大,地面沉降致使部分精密设备无法正常运行生产。后采取压密注浆技术进行地基处理,成功进行加固。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.