预制钢筋砼空心桩埋置施工工艺

介绍了钢筋砼空心桩施工的工艺流程,并根据工艺流程分别叙述了RC空心桩预制、吊装沉埋工艺及桩壁桩底压浆工艺,分析了空心桩施工中的常见事故的发生原因,提出了相应的处理方法。

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。

Rainwater quality assessment of a solidified soil cistern using new construction technology

A plastic mixture construction technology using MBER （material becoming earth into rock） soil stabilizer is introduced and the water quality of a solidified soil cistern using the technology is analyzed. Rainwater was harvested in July, 2012. Water quality of runoff and cistern water after storage was measured, including turbidity, chemical oxygen demand （COD）, total nitrogen, nitrate, and ammonia. Results show that pollutant concentrations in runoff decreased with time, indicating that runoff in the early time should be removed. Nitrate concentrations in cistern water increased after storage, while the remaining parameters decreased. Measured pollutant concentrations did not exceed the limit according to the standard for drinking water in China. It can be concluded that the solidified soil cistern with plastic mixture construction technology can provide available water for domestic use.

3D Finite Element Simulation of Tunnel Boring Machine Construction Processes in Deep Water Conveyance Tunnel

Applying stiffness migration method,a 3D finite element mechanical model is established to simulate the excavation and advance processes.By using 3D nonlinear finite element method,the tunnel boring machine(TBM) excavation process is dynamically simulated to analyze the stress and strain field status of surrounding rock and segment.The maximum tensile stress of segment ring caused by tunnel construction mainly lies in arch bottom and presents zonal distribution.The stress increases slightly and limitedly in the course of excavation.The maximum and minimum displacements of segment,manifesting as zonal distribution,distribute in arch bottom and vault respectively.The displacements slightly increase with the advance of TBM and gradually tend to stability.

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.

STRESS ANALYSIS OF FREEZING PIPES BY MODELLING

Using the simulation test facility designed on the basis of similitude principle, the authors of the paper carry out a series of simulation tests and study the influence of effective factors on the stress in the freezing pipes during hoth periods of active freezing and excavating-lining. They obtain preliminarily the regularity of stress variation and discuss the causes of freezing pipe fracture.

Architecture, Faith and Culture Antagonism or Harmony？

The relationship between architecture and faith has always been of great wealth. Faith as a way of life and social memory exercises a decisive influence on the shape of the construction environment. Yet this relationship is rarely analyzed. On a general level, one reason for this deficiency is probably due to the spread of the ideology of modernity. Given that modernity is implicitly secular, it does not prompt to understand faith in its relationship with other phenomena. It is the same for architecture. We believe on the contrary that the construction environment and the cultural aspect must interact and complement each other. When this is not true or only partially true, this results in user dissatisfaction, and refusal to engage and participate in the process of changing that environment. Many authors have tried to show explicitly the influence of Islamic thought on the social organization and the housing as well as the link between housing and identity, but its implications have not always been understood and transmitted concretely. One thing is certain： the ideological -symbolic-metaphoric sphere is the essence of architecture, as are the program requirements： functionality, distributivity, health of the environment and technology of construction. In this contribution we will address the thorny issue of cultural and religious influences on the choice of the morphology of the habitat and its components, and we will try to highlight the interaction between architecture, faith and culture through analysis of a Mediterranean type ＂House with Patio＂ as a particular architectural style, which has been enriched through the centuries by different cultures. Although the course of this typology in each of these cultures and at different times has not been the same, this has only strengthened the mission and spirit of the ＂Patio＂ until the appropriation of this model by the Arab-Muslim peoples who were able to incorporate the Islamic perception in this space.

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.

Research on Construction Process of Steel Box Girder Bridge and Its Stress Analysis

The paper introduce the construction method of large segment hosting and its difficulty, and drawing up corresponding liner and stress monitoring plan. The paper gives the calculation method of shear area for such a big cantilever thin-walled steel box girder section, namely the shear coefficient computation theory of Professor Hu Haichang, and the use of this shear area perfect beam element model, structure model and the experiment prove that the shell model is more consistent, given a certain reference for similar section project.

The Application of 3D Visualization Technology in the Construction of Water Conservancy and Hydropower

This paper put forward the structure and construction process of three-dimensional visualization of hydroelectric construction system model based on GIS and 3D visualization platform. The paper first describes the 3D visualization based on GIS, then discusses the method of constructing 3D visual digital model, and then introduces the terrain digital technology, feature modeling technology. Finally, the technical route shows that this method has good practicability.

Innovative Techniques and Technologies in Conservation Projects

The present paper analyses the possibilities of using modern technology and technical engineering in conservation practices. Some examples of heritage abuse are given alongside some innovative ways of presenting relics of the past to society. Methodology consists in the scrutinizing of chosen examples, selecting conclusions and a synthetic presentation of research results. The aim is proper protection of historic architectural resources through documentation and dissemination of knowledge. First part is concerned to rejection of old aesthetics values and implementing a new one on example of Brussels＇ House of the People （the largest work by Victor Horta that opened on 1899 and demolished in 1965 despite a protest of architects） and ridiculous renovation in Krynica, Poland. In second part, it presents tree examples of successful implementation of innovative techniques and technologies as the Pauline fathers realizations of renovation sacred architecture （churches, cloisters）, also valuable digital projects of the reconstruction of the vaults and realization of underground Museum in Krakow, Poland （the outstanding creation of the atmosphere of virtual historic reality by the latest audio-visual techniques）.

Design, Fabrication and Experimentation of a Deep Drawing Machine

This paper presents the work implemented in designing, fabricating and operating a model of a cheap hydraulic DDM （deep drawing machine）, which is currently utilized in the manufacturing processes lab in the IED （Industrial Engineering Department） at An-Najah National University. The machine is used to conduct different experiments related to the deep drawing process. This work was implemented in three stages： the first was the design stage, in which all design calculations of the DDM elements were completed based on the specifications of the product （cup） to be drawn; the second was the construction stage, in which the DDM elements were fabricated and assembled at the engineering workshops of the university; the last was the operating and experimentation stage, in which the DDM was tested by conducting different experiments. The experience gained from designing and constructing such a mechanical lab equipment was found to be successful in terms of obtaining practical results that agree with those available in literature, cost-effective relative to the cost of a similar purchased equipment, as well as enhancing students＇ abilities in understanding the deep drawing process in particular and machine elements design concepts in general.