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无接箍防砂筛管技术的研究与应用
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作者 赵国庆 张国龙 刘勇 《中文科技期刊数据库(全文版)工程技术》 2016年第10期31-31,共1页
针对油田严重出砂的危害及现有衬管防砂工艺存在的问题,研究并推广应用了无接箍防砂筛管技术,这种筛管强度高,结构上具自洁功能,防砂片缝宽可根据出砂粒度的大小进行调整,在保证渗透率的前提下达到最佳的防砂效果,适用不同等级出砂油层... 针对油田严重出砂的危害及现有衬管防砂工艺存在的问题,研究并推广应用了无接箍防砂筛管技术,这种筛管强度高,结构上具自洁功能,防砂片缝宽可根据出砂粒度的大小进行调整,在保证渗透率的前提下达到最佳的防砂效果,适用不同等级出砂油层。该技术的成功应用,在完善现有的防砂工艺基础上,形成了适用于不同类型油藏、不同井况的油井防砂配套工艺技术,提高了油井防砂的成功率,延长了检泵周期,取得了较好的防砂效果。 展开更多
关键词 箍防筛管 适度防 临界防程度 缝宽
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聚合物砂浆与聚苯泡沫板粘结机理探讨——外墙外保温材料体系的科学性问题探讨之一
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作者 周广德 《中国建材科技》 2006年第4期19-20,共2页
外墙保温材料在保温节能工程上的应用与实践中,已取得了很多成果,同时也面临一些课题,本文对外墙外保温原材料体系与应用技术的有关问题进行探讨,提出了一些新的见解,供业内人士参考。
关键词 接砂 苯粘胶 外墙保湿材料
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承插口玻璃钢夹砂管道安全阀设计理论 被引量:3
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作者 冷兴武 王荣秋 《纤维复合材料》 CAS 1999年第1期19-20,共2页
本文论述了承插口接头的特点,管道轴向拉伸应力的“相当安全阀设计理论”突破国内外传统的设计理论,提高安全系数30% ~85% 。
关键词 玻璃钢 承插口 接砂 安全阀 管道
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Mechanical behaviors of interaction between coral sand and structure surface 被引量:2
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作者 FENG Ze-kang XU Wen-jie MENG Qing-shan 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第11期3436-3449,共14页
Based on the interface shear tests,the macro-and meso-mechanical behaviors of interaction between coral sand and different structure surfaces are studied,in which CCD camera is used to capture digital images to analyz... Based on the interface shear tests,the macro-and meso-mechanical behaviors of interaction between coral sand and different structure surfaces are studied,in which CCD camera is used to capture digital images to analyze the evolution of the interaction band and a particle analysis apparatus is applied to studying the distribution characteristics of particle morphology.This study proposes four-stage evolution process based on the shear stress−strain curve.During the shear process,coral sand particles slide and rotate within the interaction band,causing the changes in shear stress and vertical displacement.In addition,the effects of structure surface roughness on shear strength,volume change and particle breakage are illustrated that the greater the roughness of slabs is,the larger the shear stress is,the more obvious the contraction effect is and the more the particles break.Furthermore,the change in particle’s 3D morphology during the breakage will change not only their size but also other morphological characteristics with convergence and self-organization. 展开更多
关键词 coral sand direct shear test interaction surface particle morphology
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Effect of a filter cake on shear behavior of sand-concrete pile interface
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作者 CHEN Chen LENG Wu-ming +3 位作者 YANG Qi DONG Jun-li XU Fang RUAN Bo 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第6期2019-2032,共14页
A filter cake is often formed between soil and concrete during casting concrete in the ground,such as constructions of diaphragm walls and bored piles.The present study aims to investigate the effect of the filter cak... A filter cake is often formed between soil and concrete during casting concrete in the ground,such as constructions of diaphragm walls and bored piles.The present study aims to investigate the effect of the filter cake on the shear behavior of the sand-concrete pile interface.A series of sand-concrete interface direct shear tests were performed with a large-direct shear apparatus while considering different roughness(I=0,10,20 and 30 mm)and filter cake thickness(Δh=0,5 and 10 mm).For a smooth interface without a filter cake,the shear stress-horizontal displacement curves showed a“softening”response.The peak shear strength and friction angle decreased exponentially with increasing theΔh.Whereas,for a rough interface withΔh=5 or 10 mm,the shear stress-horizontal displacement curves presented a“hardening”response.The peak strength,as well as friction angle,decreased linearly with increasing theΔh.Moreover,a critical roughness I_(cr)of 10 mm was observed in the tests without a filter cake.The interface shear strength initially increased with increasing I but gradually decreased when the I exceeded I_(cr).In addition,the filter cake could reduce the roughness sensitivity on shear strength. 展开更多
关键词 filter cake sand-concrete pile interface large scale direct shear test shear behavior critical roughness
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砌块路面设计要素及机理介绍
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作者 闫鸿翔 张鹏 《交通科技与管理》 2022年第9期80-82,共3页
文章主要对砌块路面的7个关键设计要素及作用机理逐个说明,依据关键要素提出砌块路面施工要点;砌块路面有三种常用的设计方法,查表法与沥青路面等效厚度法较为常用,两种方法在进行设计时均存在缺点,实际应用时两种设计结果可相互参考,... 文章主要对砌块路面的7个关键设计要素及作用机理逐个说明,依据关键要素提出砌块路面施工要点;砌块路面有三种常用的设计方法,查表法与沥青路面等效厚度法较为常用,两种方法在进行设计时均存在缺点,实际应用时两种设计结果可相互参考,结合实际应用案例对沥青路面等效厚度法与查表法设计结果进行对比,总结砌块路面在实际应用中的设计要点并给出建议。 展开更多
关键词 砌块路面 边界约束 垫层
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Compressibility dependence on grain size distribution and relative density in sands 被引量:3
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作者 SUN YiFei XIAO Yang HANIF Khairul Fikry 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第3期443-448,共6页
A framework of continuum breakage mechanics was used to investigate the dependence of compressibility on grain size distribution(GSD)as well as relative density of sand.Compressibility dependence on GSD was considered... A framework of continuum breakage mechanics was used to investigate the dependence of compressibility on grain size distribution(GSD)as well as relative density of sand.Compressibility dependence on GSD was considered by employing a GSD index and relative density dependence was reflected by varying the plastic-breakage coupling angle.Simulations of the experimental results including isotropic compression and one-dimensional compression of sands with different relative densities and GSDs revealed that sand compressibility increased with the increasing GSD index and plastic-breakage coupling angle.The coupling angle decreased with increasing relative density,indicating that grains would break more in sand with comparatively high relative density. 展开更多
关键词 grain size distribution DENSITY compression grain breakage thermo-mechanics
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