Experimental study on stability of sunken large diameter cylindrical structure on sandy seabed during construction period

A systematic experimental research work is done for the stability of sunken large diameter cylinder during construction period. It is the first research that gives the method for assessing the stability of the larger diameter cylindrical structure, a set of values is derived also for the critical stability indices of the large diameter cylinder sunken to the sandy seabed.

Penalty model for delay of bidding section construction period in South-to-North Water Diversion Eastern Route Project from perspective of programs

According to the multi-project and program management theory, this paper analyzes the program generation principle and establishes a program based on progress goals. On the basis of the present situation of calculation of penalty for delay of the bidding section construction period with the critical path method, we studied the effects of contractor-induced delay of the bidding section construction period in detail, including the effects on the construction period of the bidding section itself, the earliest start times of the next bidding section and other subsequent bidding sections, and the construction period of the program, and then constructed a penalty model for delay of the bidding section construction period from the perspective of programs. Using the penalty model, we conducted a practical analysis of penalty for delay of the construction period of the Baoying station program in the South-to-North Water Diversion Project. The model can help determine the amount of penalty for delay of the construction period in bidding sections scientifically and reasonably,

Small Town Construction in the 13th Five-Year Plan Period: A Case Study of Shangrao City

The 12 th Five-Year Plan period was unusual five years in the development of China. Under the dual pressure of complex international environment and arduous domestic reform task,China made outstanding achievements in economic development,which lays a solid foundation for building a moderately prosperous society in all respects in the 13 th Five-Year Plan period. The key and difficult points of building a moderately prosperous society in all respects lie in solving issues concerning agriculture,farmers,and rural areas. The 18 th National Congress of the CPC stated that integrated urban and rural development is the fundamental approach for solving issues concerning agriculture,farmers,and rural areas. As a transitional form from rural areas to urban areas,small town play an important role in integrated urban and rural development. In the 13 th Five-Year Plan period,China should take a new road of characteristic urbanization,energetically develop key towns,central towns,and characteristic towns,use points to drive areas,and promote coordinated progress of urbanization construction and new countryside construction. Focusing on the objective of building a moderately prosperous society in all respects and taking Shangrao City as an example,we analyzed construction of small town,in order to provide scientific theoretical reference for urbanization development,plan preparation,and policy formulation of Shangrao City.

Target for Power Construction in 9th Five-year Plan Period Set-up

According to the National Meeting on Power Construction and Cost Control held in Beijing on 26th August 1996, the target for power construction in the period of 9th Five- year Plan is set-up as follows:

Trial Demonstration of SupervisionDuring the Quality Guaranteed Period in Construction of Power Plant

The Supervision during construction of Thailand PTA Co-generation, Which was contracted by our country extended into the quality guaranteed period. The supervision during the quality guaranteed period includes the monitor of the operation and maintenance of power plant,organization of subcontractor to treat the problems and defects occurred in the field in time, technical consultancy and communication in time, delivery of spare parts, and assistance of clearing Contractor’s quality deposit. It is proved by the practice that it is necessary to early out the supervision during quality guaranteed period.

Reconstruction and Restoration of Main Facade and Wooden Ceilings of Hasan Basha Tahir Kuttab &Sabil, Cairo—Egypt

The architectural?complexes?of Hasan Basha Tahir?were suffering from many damages and deformation in different elements as load bearing walls, arches and wooden ceiling. Ground water, salt weathering, air pollution, biological colonization and environmental aspects were the main degradation factors which caused a lot of damage and deterioration phenomena in the complexes. Horizontal and vertical cracks, salts, loss of decorations, and featured dark of the stone surface were noticed at the complexes elements. In addition, the celling of the complex was in a very bad condition;?it had lost a lot of decoration elements, cracking, soot deposition, insects’ holes, and fungi growth. This research will discuss the various deterioration phenomena that?have?effect on the main building materials and cause the damages and discuss the general scientific methodology of the architectural and structural conservation project which was?carried out.

COIF:Focus on Posat-pandemic Period and Constructing A New Development Paradigm

On November 25,the 12th China Overseas Investment Fair(COIF)was held by the China Overseas Development Association in Beijing.Officials and representative from embassies or offices in China from 85 different countries,including the ambassadors from 31 countries,attended this year’s event.The COIF was held with the theme entitled“Concentrating on the post-pandemic era and constructing a new development paradigm”,and focused on how to build platforms and create business opportunities to lift the world economy out of recession.

Risk Assessment and Prediction of Construction Project Based on 1D-CNN-Attention-BP

In order to solve the problem of low accuracy of construction project duration prediction, this paper proposes a CNN attention BP combination model project risk prediction model based on attention mechanism, one-dimensional convolutional neural network (1d-cnn) and BP neural network. Firstly, the literature analysis method is used to select the risk evaluation index value of construction project, and the attention mechanism is used to determine the weight of risk factors on construction period prediction;then, BP neural network is used to predict the project duration, and accuracy, cross entropy loss function and F1 score are selected to comprehensively evaluate the performance of 1d-cnn-attention-bp combined model. The experimental results show that the duration risk prediction accuracy of the risk prediction model proposed in this paper is more than 90%, which can meet the risk prediction of construction projects with high accuracy.

Research on the Spatial Database Construction of Three-line Industrial Heritage Based on “One Map” of Territorial Space Planning —A Case Study of Mianyang Two-Bomb City

In the process of promoting the national territorial spatial planning system in all provinces, cities and counties, the geospatial database of “One Map” has realized the information sharing and collaborative work of multiple departments. Based on this, this paper intended to provide a set of standardized mapping models for industrial heritage storage, and through the establishment of the database to protect and reuse the status quo of industrial heritage research. This paper took the third-line construction industrial heritage of Mianyang “Two-Bomb City” as the research object, developed the relevant drawing standards of third-line industrial heritage database, and studied the database construction process. GIS technology is used to establish a geospatial database of the third-line industrial heritage in cooperation with the “One Map” system, in order to provide reference for the storage of the third-line industrial heritage in various places, and to protect and reuse the third-line industrial heritage from the perspectives of spatial factors, planning coordination and dynamic assessment.

论授益行政行为职权撤销的除斥期间——以《行政程序法》制定为视角

职权撤销是按照依法行政原则对违法行政行为的消灭,属于行政机关的自我纠错行为。对于具有持续性法律效果的授益行政行为,毫无时间限制的职权撤销,将对其构建的法律关系网的稳定性及所涉利害关系人权益产生重大影响。职权撤销的期限在性质上属于除斥期间。出于维护法律秩序安定性、规范行政权、避免私方利益遭受更大损失以及避免“过”与“罚”严重失衡等考虑,授益行政行为职权撤销宜设置除斥期间。通过比较研究,出于不同规范功能,除斥期间宜采用短期限与最长期限相结合的方式。短期限采用主观起算标准,以行政机关知道撤销事由之日作为期间起算点;最长期限采用客观起算标准,以行政行为作出之日为期间起算点。因相对人欺诈而行政行为违法的,职权撤销除斥期间只宜设定短期限。

五四时期《资本论》传播力建构的翻译赞助之道

五四时期,《资本论》在中国的传播实现了前所未有的成功,从而进入了中国政治思想文化的中心,有力助推了中国革命的新民主主义转向。五四时期《资本论》传播力建构的成功,得益于五四精英多元互补的翻译赞助策略。通过赞助推出简明的阐释性文本强化《资本论》学理的易解性,在《新青年》等报刊刊文介绍、评论与节译强化传播广度,筹划马克思主义研究会等社团的译介与研究活动、演讲、授课及与进步力量积极互动强化传播深度和力度,五四精英有力赞助了《资本论》的中国传播。五四时期《资本论》传播力建构的翻译赞助之道对当前中国化马克思主义著作的国际传播力建构极具现实启示意义。

“两个结合”视域下五四时期阶级斗争思想传播力建构研究

阶级斗争思想是五四时期中国进步知识分子借以确立无产阶级革命信仰并改变中国革命进程的经典理论之一。陈独秀等五四精英将阶级斗争思想作为新民主主义革命的武器进行传播时,并非机械而教条地照本宣科,而是结合农民阶级在中国革命事业中举足轻重、中国反对帝国主义压迫及大同思想等传统文化根深蒂固的实际,对阶级斗争理论进行了顺应性调适。同中国具体阶级状况的实际和大同思想的结合,有力助推了阶级斗争思想在中国空前成功的传播。五四时期阶级斗争思想传播力建构中的两个结合,对当下中国化马克思主义著作的国际传播力建构颇具现实启示意义。

品牌建设期的高校党建品牌创建路径探究

高校党建品牌建设期整体可分为培育期、成熟期和转型期3个阶段。这3个阶段的建设重点分别是:策划、培育和维护党建品牌,提高品牌质量和美誉度;培育和塑造党建品牌文化,建设文化阵地,增强品牌忠诚度;评估并转型或更新品牌,实现品牌的转型或更新与再创新,保持创新活力。创建高校党建品牌建设期路径有助于高校基层党组织更好地规划和促进党建品牌的发展,以此应对党建品牌在不同建设阶段的需求和挑战。

艰险山区铁路建造期通信综合承载网研究

艰险山区铁路沿线的移动通信基础设施大多较薄弱。在施工建造期,铁路沿线具有语音、数据、视频监控和应急通信等业务需求。分析梳理艰险山区铁路沿线基础设施监测业务,对建造期语音、数据和视频监控需求带宽进行调研,针对施工现场不同的通信网络覆盖场景和不同的业务承载需求,提出具有针对性的施工通信解决方案,采用网络融合方式,搭建一套覆盖全线的建造期通信综合承载平台,实现基础设施监测、语音、视频和应急等业务的传输。同时,探讨建造期通信承载网在运营期开展永临结合,提出永临结合的建设思路。

地铁建设期碳排放核算研究进展

全球变暖是人们高度关注的生态环境问题之一,碳排放成为研究热点。交通运输行业会产生大量能耗,地铁作为一种安全环保的交通方式正高速建设,建筑行业又具有较大减排空间,故对地铁建设期碳排放进行核算有助于预测碳排放趋势并为碳减排提供研究基础。本研究总结了地铁建设期碳排放核算在评估方法选择、系统边界划分、清单分析等方面的研究进展,学者们多基于全生命周期理论,使用排放因子法,将碳排放来源划分为建材生产、材料运输和现场施工3个阶段开展碳排放研究。本研究就现有清单分析内容进行了对比分析,发现建材生产阶段碳排放占比最大,且钢筋、混凝土、水泥是主要的高碳排建材,依此提出了地铁建设碳排放核算的基本研究方法及减排思路。

社会主义革命和建设时期(1949—1976)中国观演建筑外部形态特征研究

在社会主义革命和建设时期(1949—1976),新中国完成了从“农业大国”到“工业大国”的历史巨变。这其中,观演建筑作为承载这一时期群众生活文化建设的物质载体,见证了其中的历史思潮发展,并直观体现在其外部形态特征上。该文拟通过文献查阅厘清全国观演建筑分布特征,并进一步从构图形式和风格特征两个方面对其外部形态特征展开研究,分析其不同形式背后的特定内涵与文化,既为当下建筑设计的多元化语境提供历史依据,也为相关部门对这一特定时期的历史建筑评价提供参考依据。

基于营造尺复原的土家族土司建筑断代与营造系统类型探索

土家族土司建筑采取既非官式、也非民居的地方做法,对于历史文献不足、建筑型制系统暂未明晰的地方建筑来说,断代面临难题。通过营造尺复原,建立营造尺序列,据此推断相关建筑年代,探讨土家族土司建筑年代一种判定方法的应用。针对本地区不同营造尺并行现象,提出在官式与民居建筑之外存在另一类地方高级建筑,或可称之为“地方官式建筑”,分属不同营造系统。这一探索有助于深化地域建筑断代研究、厘清我国传统建筑营造体系类型。

施工期分层浇筑与温度荷载对重力坝坝踵应力影响研究

【目的】坝踵应力是评价重力坝安全的关键性控制指标。重力坝设计时自重按一次施加,并未考虑施工期大坝实际浇筑过程及温度荷载,因此,【方法】以三峡重力坝工程泄2坝段为例,基于大坝设计资料和温度监测数据,对大坝混凝土的关键热学参数进行反演。在此基础上,模拟大坝施工过程、材料性能变化过程、气温变化过程、纵缝接缝灌浆过程、通水冷却过程以及表面保温措施,进行大坝施工期全过程工作性态仿真分析,研究施工期分层浇筑与温度荷载对大坝应力尤其坝踵应力的影响。【结果】结果显示:仿真计算得到的监测点的温度变化规律与实测值吻合较好;分层浇筑模拟时自重产生的坝踵竖向压应力为7.32 MPa,自重一次施加产生的坝踵竖向压应力为7.70 MPa;施工期温度荷载引起坝踵观测部位的竖向压应力增量最大值为1.1 MPa。【结论】结果表明:自重荷载的施加方式对重力坝坝踵应力影响较小,分层浇筑自重荷载引起的坝踵竖向压应力略小于自重荷载一次施加的情况;纵缝接缝灌浆后坝体温度回升导致中块挤压上块,进而引起坝踵部位产生较大竖向压应力,这可部分解释目前重力坝实测坝踵应力多为较大压应力的原因。

基于FBG(光纤光栅)监测技术的地铁盾构隧道环向变形研究

[目的]FBG(光纤光栅)监测技术具有动态响应快、抗干扰强、精度高、耐久性强等优点,能实现远距离实时监测,其反馈的环向变形监测数据对盾构掘进过程的参数调整有着重要意义,有必要基于光纤监测技术对管片环向变形规律进行深入研究。[方法]以某地铁隧道工程为例,采用光纤传感器对地铁隧道施工期管片进行实时监测。通过监测数据分析,研究管片施工环境中的环向应变变化规律,分析相对收敛位移与盾构掘进参数之间的相互关系。[结果及结论]监测数据表明,环向变形主要集中在管片安装之后的一周内和相邻隧道掘进的50 m范围内,当地层差且埋深小时,后掘进隧道对已施工管片收敛的影响程度为50%;当地层好且埋深大时,而后掘进隧道对已施工管片收敛的影响程度约为65%~83%。不同埋深时管片应变受土层及邻线隧道施工的影响较大,其中埋深小且土层差的管片变形变化大,埋深较大的管片约束性较好,变形变化不明显。相对收敛位移与盾构掘进参数存在明显的联系,盾构的总推力与管片的相对收敛位移存在负相关的关系,盾构的掘进速度与管片的相对收敛位移存在正相关的关系。采用FBG监测技术得到的实时监测数据,能作为盾构机掘进参数调整的依据。