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     

浅谈砌体结构墙体裂缝成因及控制

分析了砌体结构墙体裂缝产生的原因,并指出了一些常见的砌体结构墙体裂缝产生的防治措施。     

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。     

浅谈采用新型砌块墙体裂缝产生的原因及其防治措施

用新型砌块砌筑的墙体产生裂缝,是我国墙体材料革新后产生的一种新的质量通病,已引起人们的重视,本文就墙体产生裂缝的原因及防治措施进行分析和探讨.     

浅析新型墙体材料在建筑工程应用中的裂缝问题

墙体裂缝的控制是-个复杂的问题,需要材料、设计、施工等方面的相互协调、共同配合.在各个环节采取严密的措施,墙体裂缝是可以得到有效控制的.     

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。     

地基下沉及墙体裂缝校正探索

通过对太钢尖山铁矿变电站配电室地基下沉而导致配电室地基下沉、墙体裂缝的处理过程的论述,介绍了采用千斤顶均匀布置,整体顶升、现场监测归位这样一种简单、可靠处理地基下沉及墙体裂缝的施工方法。     

蒸压加气混凝土砌块墙体裂缝的防治

介绍了蒸压加气混凝土砌块的特性，施工准备及施工工艺，分析了蒸压加气混凝土砌块墙体裂缝产生的原因，提出了有效防治墙体裂缝的措施，需从设计和施工两个方面入手，才能确保砌块墙体的施工质量。     

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 …     

某工程地下室纵墙裂缝的分析与处理

本文对某工程地下室纵墙裂缝发生的成因，机理过程进行分析，表述了对带有地下室框架结构温度变开缝的认识，提出地下室纵墙裂缝的防治措施。     

谈住宅楼外墙抹灰层裂缝的防治与处理

建筑物外墙抹灰层经常出现裂缝、渗水、空鼓、甚至脱落现象,正确预防和处理好建筑物外墙抹灰层的裂缝是保证外墙施工质量的前提,文章针对住宅楼外墙抹灰层裂缝产生的原因进行了分析,制定了预防和处理措施。     

42MnMo7钢冷拔厚壁管内横裂纹的去除

针对42MnMo7钢冷拔厚壁管存在内表面横裂纹问题．分析了其产生的原因。通过改进中间退火和冷拔管工艺．厚壁管内横裂缺陷得到基本消除。     

TP347H过热器管爆管原因分析

通过对TP347H过热器早期爆管实物的规格尺寸、金相组织等的综合分析，认为过热器管管面存在应力腐蚀裂纹、管壁局部较薄且经历过焊接过程，组织发生了转变，这些因素均使得管壁局部有效强度降低，最终导致过热气管从该处早期爆管。     

济钢3200m^3高炉铁口喷溅治理

分析认为,济钢3200m3高炉铁口喷溅主要原因是碳砖与冷却壁及碳砖与刚玉复合砖之间的缝隙填充不密实以及应力导致的炮泥裂纹等,致使煤气窜漏,铁口喷溅。采用在风口以下铁口区域钻孔灌浆的措施封堵砖缝煤气窜漏;利用专用炮帽,通过铁口通道压入自配浆料,封堵炮泥裂纹,两种方法的结合解决了铁口喷溅的问题。     

Effects of Nickel Coating of Mold Plates on Star Crack Defects

Star crack defects encountered during the continuous casting of slab are elucidated in the current article. Trials were carried out to obtain basic information on the behavior of the star cracks under same casting conditions for different grade materials. It is important that star cracks form in the mold, and increase later in the casting process during the straightening. Star crack defects are clearly seen when using copper-based molds. The influences of steel carbon content, material grades, and mold type have been discussed. It is believed that defects in continuously cast products are minimized while using a nickel-coated mold wall in casting.     

09CuPTiRE尖角矩管裂缝原因分析

对０９ＣｕＰＴｉＲＥ尖角矩管裂缝进行了分析，结果表明，矩管内壁存在较深的微裂纹及晶界上存在磷的偏析是导致管子焊后开裂的主要原因。提出了预防措施。     

房屋建筑墙体裂缝成因及对策

文章从多方面详细论述了墙体裂缝的成因,并提出了解决方案。     

Fracture toughness of brittle foams

Existing models for the fracture toughness of brittle cellular materials have two limitations: the crack is assumed to be large relative to the cell size and the modulus of rupture of the cell wall material is assumed to be constant. In the previous companion paper, we reanalyzed the fracture toughness using a finite element analysis for short cracks and assuming that the modulus of rupture of the cell wall material followed a Weibull distribution. The finite element analysis gave a reduction factor for the effective fracture toughness for short cracks which was independent of the cell geometry. The Weibull analysis showed that the effect of cell size on the fracture toughness of brittle honeycombs is dependent upon the Weibull modulus of the cell wall material. We now apply similar ideas to the analysis of the fracture toughness of brittle foams.     

Noninvasive photoelastic method to show distribution of strain in the hoof wall of a living horse

A photoelastic method used for materials testing in industry was adapted to show the distribution of strain through the hoof wall in the living horse. Strain was a change in length per unit length in the material of the loaded hoof wall compared with the unloaded condition. Coloured fringes appeared in the photoelastic plastic where there were differences in strain between adjacent sites (strain gradients) in the hoof. Strain distribution was observed in the shod and unshod hoof wall of the front hooves of 6 sound horses with hooves that appeared 'good' to visual inspection, and one unsound horse with hoof cracks. No significant differences in strains were apparent across the hoof walls of the sound horses when the horses were standing normally. Steep strain gradients were apparent in hooves, associated with defects such as cracks, unstable nail holes, and long toes.