高层房屋建筑工程技术管理要点探究

现如今,城市化建设的步伐逐渐加快,与过去相比,无论是建筑施工技术,抑或是施工水平都有了很大的提升,为城市增添了不少高层房屋建设项目。而高层建设项目不但建设难度比普通项目大,并且需要投入的建设成本也更高,因此对于项目施工技术的要求相对严格,给技术管理工作带来了一定挑战。基于此,本文将重点探讨高层房屋建筑工程技术管理要点。

建筑工程项目现场安全管理的必要性及措施

建筑工程项目的现场施工安全管理是一项关键性的工作，不仅关系着工程项目的施工质量、进度、效益，更关系着施工人员的生命安全。因此，我们必须本着以人为本的理念和原则抓好建筑工程项目现场安全管理。

建筑工程渗漏原因及防水防渗工程技术实践

在项目开展的阶段中受制于设计因素、材料因素以及工艺因素的影响,存在一些渗漏问题给工程项目的质量造成了一定的影响。因此对防水防渗施工技术的要点进行分析,探寻出更为科学有效的技术方案。

关于建筑工程中钢筋检测技术的分析

钢筋作为建筑工程施工建设重要材料,其性能与质量是否合格,在很大程度会对工程施工质量产生影响。就现状来看,很多企业为降低施工成本,会放松对材料质量的管理,选择应用成本低但是性能较差的材料,而埋下质量隐患。为确保工程施工质量,必须要做好钢筋性能检测,确定其完全满足施工要求,本文对建筑工程钢筋检测技术进行了简要分析。

建筑钢筋工程的施工工艺质量安装

本文从钢筋制作墙、梁与板的钢筋绑扎与安装,钢筋配料等方面介绍了钢筋工程的施工方法,并提出了各项质量标准,以保证工程的质量。

Stability control of underground construction

This paper presents the reason for instability of underground construction. In order to know failure mechanism during the whole construction process, a research framework of multi-scale based on experiments and numerical analysis is established. Some promising aspects in the topics of stability control are also given in the paper.

Using analytic network process to analyze problems for implementing turn-key construction projects in Taiwan

The turn-key construction project is implemented in Taiwan not by a single company but by a make-shift group of several companies. Hence,problems to coordinate the professional construction management (PCM) and the supervising architectural company often occur for the lack of long-term experience to work together. The various factors that affect the implementation of turn-key projects currently practiced in Taiwan are analyzed using the analytic network process (ANP). The objective is to study how the twelve key factors in the four layers of "Role assignment","Signing contract","Operational procedures" and "Losing capital investment" affect the progress of implementing the turn-key project in Taiwan. The results reveal that "Delay in payment" has the most negative influence with 15.62% weighing factor; "Latent risk" comes next with 11.14% weighing factor,and "Responsibility of construction company for project quality" is the third with 10.79% weighing factor.

Research of deformation prediction method of soft soil deep foundation pit

In view of the characteristics of soft soil deep foundation pit for the construction and geotechnical characteristics of the special medium,it is difficult to calculate theoreti- cally accurately structural deformation of the foundation pit,so in the course of excavation on the construction of the information is particularly important.The analysis and compari- son of several popular non-linear forecasting methods,combined with the actual projects, set up a grey theoretical prediction model,time series forecasting model,improved neural network model to predict deformation of the foundation pit.The results show that the use of neural network to predict with high accuracy solution,it is the foundation deformation prediction effective way in underground works with good prospects.

Numerical simulation of flows around long-span flat roof

Long-span roof with span larger than height always has a complicated three-dimensional curve. Wind pressure on the roof is often influenced not only by the atmospheric turbulence, but also by the “signature” turbulence provoked in the wind by the structure itself. So it is necessary to study characteristics of flows around the roof. In this paper, three-dimensional numerical simulation of wind-induced pressure has been periormed on a long-span flat roof by means of Computational Fluid Dynamics （CFD） software ——FLUENT. The flow characteristics are studied by considering some parameters, such as wind direction, span-height ratio, roof pitch, flow characteristics, roughness of terrain. The simulation is based upon the Reynolds-averaged equations, in which Reynolds stress equation model （RSM） and SIMPLE technology, （Semi-Implieit Method for Pressure-Linked Equations） have been used. Compared with wind tunnel tests, the computational results have good agreement with the experimental data. It is proved that the results are creditable and the method is feasible.

Risk Simulation Modeling of Engineering Cost Based on MATLAB/SIMULINK

Based on MATLAB/SIMULINK, the paper has proposed cost risk simulation models separately in accor-dance with the circumstances of correlation and independence between the influential factors of cost risk. The mean,variance and the risk level under the above-mentioned two circumstances have also been compared with a case study.Also the sensitivity analysis of cost risk has been probed into. The result indicates that the model which takes into ac-count correlation is more objective, and the model which ignores the circumstance of correlation normally underes-timates the risk level of project cost.

Comparing material wastage levels between conventional in-situ and prefabrication construction in Hong Kong

Generation of construction wastes constitutes a major impact to the environment. Studies have been directed toward reducing wastes of the various construction processes. However, contractors in Hong Kong are rather conservative and lack motivation to develop new technology for waste minimization. This paper examines the benefits of using prefabrication in reducing material wastage levels for some traditional in-situ trades such as concreting, rebar fixing, bricklaying, drywall, plastering, screeding and tiling in Hong Kong. By measuring thirty construction projects, it is been found that waste levels of all major construction trades can be effectively reduced. This is particularly significant in the trade of plastering where 100% saving can be achieved after adopting prefabrication. The standardized design of the building can also be useful in the adoption of prefabrication for private housing projects.

Personnel Management in the Slovak Building Industry： Analysis of Small, Medium-Sized, and Big Building Companies

This paper summarizes the results of the authors＇ research conducted in November 2013 with the aim to analyze the organization and standards of the personnel management in the Slovak building industry. The research was based on the presumption that optimal mastering of the personnel management is a precondition of the success of each building company that wishes to be a continuously prosperous, competitive, and respected economic and social entity. Altogether, 76 small （less than 50 employees）, 77 medium-sized （50-249 employees）, and 21 big （250 and more employees） building companies operating in the territory of the Slovak Republic took part in the research. The results of the research showed that the concept of the personnel management in big building companies （in particular in comparison to most small companies but some medium-sized companies） was more strategic and systematic which is natural given the high numbers of employees of various professions who carry out manifold building works in a huge set of working conditions. However, from the point of view of the current economic development, all building companies have to develop their adaptability to the building market and their capability to master various building works. It is just the personnel management that is used to make it all up provided it is implemented efficiently in a purposeful way in order to keep the stable operation of the building company and satisfaction of various needs of stakeholders including but not limited to employees and clients.

Computerised Development Control and Approval System for City Hall of Kuala Lumpur

This paper will discuss the computerised developm en t control and approval system being developed for the Planning and Development C ontrol Department, City Hall of Kuala Lumpur, with stress on the GIS architectur e developed within the system. The prospects and challenges towards implementati on of the system are also discussed.

Comparative Analysis of High-Rise Reinforced Concrete Structures According to International Seismic Design Codes

The field of earthquake engineering and seismology is of great importance to structural engineers around the world. The location, size and consequences of an earthquake are variable depending on several conditions. Surface conditions, boundary/fault type, distance from the boundary and hypocenter are all elements that dictate the outcome of a seismic event. The paper presents a comparison of seismic provisions of two seismic design codes--EC8 （Eurocode 8） and IBC （International Building Code） 2006, to a high-rise reinforced concrete building. The building is irregular and composes of 20 floors. The equivalent lateral force analysis was performed using the well-known structure program--ETABS （Extended 3D Analysis of Building Systems）. Based on the analysis results （inter-storey index, global damage index, storey displacement, inter-storey drift ratio and base shear）, EC8 was found to be conservative when compared with IBC 2006. The conclusion is that for the design and analysis of high-rise reinforced concrete buildings with certain irregularity, EC8 provisions were considered to be conservative.

Present situation and improving measures of Chinese Construction Engineering Management informatization

Building engineering management is a huge and complex work, which the key to ensure the quality ofconstruction projects. With the rapid development of the domestic construction industry, the traditional engineering management model can not meet the needs of a large number of construction project information exchanges. Only realizing informationization of construction engineering management, can reduce the cost of construction projects, improve the efficiency of project management and construction progress. This paper analyzes the current situation of construction management informatization, and puts forward some suggestions to strengthen the construction management information construction.

Crucial problems on security assessment of a building site adjacent to an excavated high slope

The subject of this work is the assessment on the stability of an excavated high slope in order to insure the security of the building site adjacent to the slope, which is frequently encountered in town construction in mountainous areas due to terrain limit. On the base of some typical engineering cases in Chongqing, several crucial problems on security assessment of building site adjacent to an excavated high slope, including the natural geological conditions and man-destroyed degree, engineering environment, potential failure pattern of the high slope, calculation parameters and analysis methods, are roundly discussed. It is demonstrated that the conclusion of security assessment can be determined according to the aspects above-mentioned, and the security assessment is one of the fundamental data to insure the safety of the related construction, site and buildings.

Development Trend of Water Supply and Drainage Engineering Based on Life Cycle Assessment and Building Information Model

With the rapid development of construction engineering and municipal engineering in recent years, water supply and drainage technology has gradually matured. Building water supply and drainage design contains the design of rainwater drainage, sewage drainage design, water supply design and fire water supply design. At present, the research on the life cycle assessment of urban drainage system is mainly focused on the sewage treatment plant, therefore in this paper we introduce the theoretical basis of life cycle assessment. In the era of information network, building information model（BIM） technology is widely applied to the design of building water supply and drainage, which and effectively improves the design effi ciency, and makes up for the traditional water supply and drainage design of a lot of problems. In this paper, we analyze the development trend of water supply and drainage engineering based on life cycle assessment and building information model.

Research on Construction Process of EPS in the Thermal Insulation Building

In order to improve the efficiency of EPS integral thermal insulation building design and optimize the construction process of insulation construction, this paper uses experiment parts and simulation form to design the thermal insulation construction process, and evaluates the effect of heat preservation. Based on the finite element theory this paper designs adding process of insulation material EPS in the thermal insulation layer, and establishes the radiation heat conduction model of EPS material, finally obtains the solid heat conduction equation. Finally this paper uses ANSYS software to do simulation on the strength and temperature of EPS construction, and evaluates the quality of construction works, which provides technical reference for the design of integrated thermal insulation buildings.

New Approach to the Delivery of Construction in Botswana

The construction industry in Botswana has been identified as an industry with many problems. Currently the Botswana government uses the design-bid-build process, using prequalification and awards to the lowest bidder for construction services. The government can also use the design-build delivery system. The current delivery system uses an engineering group that delivers designs and construction, uses a procurement group to award the contract and contract modifications. However, the analysis for all actions is done by the engineering group. The model is very similar to the Corps of Engineers traditional processes in the United States. Construction performance （on time and no contract deviations） has not been good. The authors propose that the delivery system and the paradigm of direction, control and decision making by the engineering group causes risk to the project and results in poor contractor performance. The authors suggest making modifications in the process and to use the design-build process. The authors also propose to change the paradigm using best value PIPS/IMT concepts.