以中国知网(CNKI)和Web of Science为数据源,以智能建造领域2000—2023年期间的高质量文献为对象,借助CiteSpace对筛选出的中外文献进行分析,探讨智能建造当前的研究热点及其演进趋势。结果表明:研究主题方面,中外文献均围绕信息化展开...以中国知网(CNKI)和Web of Science为数据源,以智能建造领域2000—2023年期间的高质量文献为对象,借助CiteSpace对筛选出的中外文献进行分析,探讨智能建造当前的研究热点及其演进趋势。结果表明:研究主题方面,中外文献均围绕信息化展开;研究热点方面,中文文献从研究对象、智能建造技术及研究内容等多种视角开展研究,外文文献重点关注数字化技术在建设项目全生命周期的应用;热点演进趋势方面,中文文献划分为信息化引入、信息化与数智化的初步探索、数字化与绿色智能化的全面应用三个阶段,外文文献可分为技术与理论初探、信息化与自动化、数字化与智能化三个阶段,总体上,中文文献的研究在学习和借鉴外文文献研究的过程中不断深化与成熟,且绿色智能化是未来的研究焦点。展开更多
Beishan Rock Carvings in Chongqing,a renowned cultural heritage site in China,flourished during the Tang and Song dynasties and are often referred to as the“Stone Carving Art Museum of the Tang and Song Dynasties.”C...Beishan Rock Carvings in Chongqing,a renowned cultural heritage site in China,flourished during the Tang and Song dynasties and are often referred to as the“Stone Carving Art Museum of the Tang and Song Dynasties.”Cave 168 is a key component of the Beishan Rock Carvings.At present,several through-going cracks have developed in the roof of Cave 168,severely compromising the structural stability of the grotto.The early internal steel plate supports have suffered severe corrosion and can no longer provide effective reinforcement.In addition,the presence of steel columns obstructs visitor access and negatively affects the viewing experience.A new reinforcement method is urgently needed.Therefore,studying the deformation patterns of the structure is of critical importance.This study analyzes the stratigraphic parameters and fracture distribution of Cave 168,considering key influencing factors such as rainfall,self-weight,and the overlying Quaternary soil.On-site monitoring and physical model experiments were conducted to evaluate the changes in roof crack width and displacement before and after reinforcement with negative Poisson's ratio(NPR)anchor cables.The results reveal that the roof of Cave 168 contains several through-going cracks and numerous microcracks,which serve as infiltration channels for surface water.These accelerate the softening of the mudstone and pose a significant threat to the cave's structural safety.During the experiment,the main change in the crack exhibited a“semi-archshaped”propagation pattern.In the first ten minutes,as the rock transitioned from dry to moist conditions,a slight crack closure was observed.As rainfall continued,crack propagation accelerated.After rainfall ceased,crack width remained stable over a short period.Under NPR anchor support,the influence of rainfall on roof settlement was effectively mitigated,ensuring the safety and stability of the roof.The NPR anchors successfully limited the roof settlement to within 0.3 mm and provided effective control over both total and differential settlement.These findings offer valuable insights into the application of NPR anchor cables in the conservation of grotto heritage structures.展开更多
文摘以中国知网(CNKI)和Web of Science为数据源,以智能建造领域2000—2023年期间的高质量文献为对象,借助CiteSpace对筛选出的中外文献进行分析,探讨智能建造当前的研究热点及其演进趋势。结果表明:研究主题方面,中外文献均围绕信息化展开;研究热点方面,中文文献从研究对象、智能建造技术及研究内容等多种视角开展研究,外文文献重点关注数字化技术在建设项目全生命周期的应用;热点演进趋势方面,中文文献划分为信息化引入、信息化与数智化的初步探索、数字化与绿色智能化的全面应用三个阶段,外文文献可分为技术与理论初探、信息化与自动化、数字化与智能化三个阶段,总体上,中文文献的研究在学习和借鉴外文文献研究的过程中不断深化与成熟,且绿色智能化是未来的研究焦点。
文摘Beishan Rock Carvings in Chongqing,a renowned cultural heritage site in China,flourished during the Tang and Song dynasties and are often referred to as the“Stone Carving Art Museum of the Tang and Song Dynasties.”Cave 168 is a key component of the Beishan Rock Carvings.At present,several through-going cracks have developed in the roof of Cave 168,severely compromising the structural stability of the grotto.The early internal steel plate supports have suffered severe corrosion and can no longer provide effective reinforcement.In addition,the presence of steel columns obstructs visitor access and negatively affects the viewing experience.A new reinforcement method is urgently needed.Therefore,studying the deformation patterns of the structure is of critical importance.This study analyzes the stratigraphic parameters and fracture distribution of Cave 168,considering key influencing factors such as rainfall,self-weight,and the overlying Quaternary soil.On-site monitoring and physical model experiments were conducted to evaluate the changes in roof crack width and displacement before and after reinforcement with negative Poisson's ratio(NPR)anchor cables.The results reveal that the roof of Cave 168 contains several through-going cracks and numerous microcracks,which serve as infiltration channels for surface water.These accelerate the softening of the mudstone and pose a significant threat to the cave's structural safety.During the experiment,the main change in the crack exhibited a“semi-archshaped”propagation pattern.In the first ten minutes,as the rock transitioned from dry to moist conditions,a slight crack closure was observed.As rainfall continued,crack propagation accelerated.After rainfall ceased,crack width remained stable over a short period.Under NPR anchor support,the influence of rainfall on roof settlement was effectively mitigated,ensuring the safety and stability of the roof.The NPR anchors successfully limited the roof settlement to within 0.3 mm and provided effective control over both total and differential settlement.These findings offer valuable insights into the application of NPR anchor cables in the conservation of grotto heritage structures.
