TANG Ming- fang , WANG Dong , ZHENG Kai -li
2006, 28(2):1-3. DOI: 10.11835/j.issn.1674-4764.2006.02.001
Abstract:分析了山地气候的特点以及对城市热环境的影响,论述了山地城市气候与城市规划、绿化之间的关系,通过红外热像仪测试公路堡坎墙与绿化带的温度以及有无绿化屋面温度的对比,显示城市硬化表面绿化可降低表面温度峰值15℃以上,说明城市绿化对改善城市热环境有显著效果。
2006, 28(2):4-7. DOI: 10.11835/j.issn.1674-4764.2006.02.002
Abstract:According to the motor vehicles development in modern cities,this article explains the principles of establishing a parking index for residential areas and puts forward how to establish a set of new parking index to be adapted to the developing situation,meanwhile,the implement of multi-factor design pattern is discussed.
LIN Cong - hua , ZHANG Xin - guo , LIN Zhao - wu
2006, 28(2):8-10. DOI: 10.11835/j.issn.1674-4764.2006.02.003
Abstract:In light of the planning of General Mountain Park in Zhangzhou and its execution, this paper intends to explore the relationship of spatial structure between the historical birthplace of Zhangzhou exploitation at the beginning of Tang Dynasty and the place where the first ancestors of Zhangzhou exploitation were buried. This paper then presents the artistic techniques and features of the spaces in General Mountain Park in respect of geography, planning structure and traditional courtyard. Thus, the conclusion is drawn in this paper that by means of the combination of modernity with tradition as well as the history with the realism, the spatial art is supposed to establish the Chinese traditional construction culture characterized by nationality and locality.
2006, 28(2):11. DOI: 10.11835/j.issn.1674-4764.2006.02.004
Abstract:In urban design, only by continuous and dynamic research work from design to finally putting it into practice, can we made good control on city appearance. This article analyzes nowadays defects in our urban design from two aspects as the result establishment and validated control, and tries to conceive a feasibility plan to solve the problem.
YAN Yong - hong , HE Hong - guang , WU Tie - hui
2006, 28(2):14-16. DOI: 10.11835/j.issn.1674-4764.2006.02.005
Abstract:This thesis puts forward a point of view from the modern architectural aesthetic that the lighting design of symbolic buildings could be finished in such a way: by using a literary descriptive and improvisational technique,the results will be variable,theatrical and exciting.This thesis also shows the possibility to finish a design according to this theory by illustrating two examples.
ZHOU Tie -jun , ZHANG Jie , YUAN Yuan
2006, 28(2):17-20. DOI: 10.11835/j.issn.1674-4764.2006.02.006
Abstract:According to the development trends of modem industrial architecture and combining with the situation of China, the essay first proposes the design strategies of modern industrial architecture in China, and then strongly verifies these strategies with deep analysis of advanced design precedents, in the end points out these strategies are very necessary and appropriate in China.
2006, 28(2):21-23. DOI: 10.11835/j.issn.1674-4764.2006.02.007
Abstract:Under the special geography and climate environment,the folk houses of southeast Chongqing have developed their particular ethnic character.In this paper,the construction technology and art of the Tujia folk houses are analyzed and summarized from three aspects: building material and form of element,roof truss and shape of the roof as well as building decoration art.
2006, 28(2):24-27. DOI: 10.11835/j.issn.1674-4764.2006.02.008
Abstract:针对当前我国历史文化遗产保护中的矛盾和问题,提出混乱的价值认识是保护观念不能得到统一的根本原因。以历史与现代,西方与东方多维度探讨当代历史文化遗产价值体系的构成。提出以目前西方对于历史文化遗产“真实性价值,情感价值,文化价值和使用价值”的总体认识为核心,以代表我国文化多样性的“中国传统和现实社会对遗产价值内涵的发展”为两极,形成当代我国历史文化遗产价值体系的完整格局。
2006, 28(2):28-32. DOI: 10.11835/j.issn.1674-4764.2006.02.009
Abstract:In this paper,the basic feature of the theory of "figure-ground relation" is sought through preliminary introduction of the theory and contrastive analysis on spaces of traditional cities and current cities.At the same time,the authors point out the reality of misapprehension and misapplication of "figure-ground relation" to the theory and practice of current urban design.In conclusion,the adaptability of the theory of "figure-ground relation" to current urban design is preliminarily discussed by combining the basic feature of the theory with concrete cases.
2006, 28(2):33-35. DOI: 10.11835/j.issn.1674-4764.2006.02.010
Abstract:In light of the current situation of energy efficiency building design in China and the situation of energy analysis tools application both at home and abroad,aiming at the fact that traditional energy efficiency building design methods cannot meet current needs,this paper puts forward a new design approach-integrating BIM technology with energy efficiency analysis to carry out energy efficiency building design.The virtual building model created with BIM technology is an electronic database containing all of the building's information.By importing this virtual building model into energy analysis tools,we can automatically identify and analyze the model's great amount of information so as to quickly and easily get the energy efficiency analysis results.
LING Tong - hua , LI Xi - bing , DAI Ta - gen , PENG Zhen - bin
2006, 28(2):36-39. DOI: 10.11835/j.issn.1674-4764.2006.02.011
Abstract:In millisecond blast engineering,the key to achieving millisecond blast is to ascertain reasonable delay time interval.Firstly,the authors make use of time-energy density analysis based on wavelet transform,and get the real delay time by identifying the blast moment of short-delay detonators.Secondly,every sub-signal is separated from measured millisecond blast vibration signal by time-frequency domain transform techniques.Lastly,the Optimized delay time interval is obtained by comparing the superposition effect of sub-signal in different delay time interval.The effectiveness of the proposed method is verified with time-energy density analysis of millisecond blasting vibration signals in an underground project.It shows a high theoretical and practical value,and establishes a theoretical and technical foundation for the study of controlling and forecasting blast vibration damage.
XU Jiang , YIN Guang -zhi , WANG Hong , TANG Yu
2006, 28(2):40-42. DOI: 10.11835/j.issn.1674-4764.2006.02.012
Abstract:This paper has probed into the evolution of the hysteresis curve of rock under the cyclic loading by the experimental research on the deformation characteristics of sandstone under cyclic loading in three axial stress levels.The following results have been indicated: whether the hysteresis curve change will depend on the stress level,when the stress level is low,the acreage closed in the hysteresis curve will go invariable with the increase of cyclic count,but when the stress level is high,the acreage closed in the hysteresis curve will be invariable from the decrease and then to the increase with the increase of cyclic count.
HUANG Gun , YIN Guang - zhi , LI Dong - wei
2006, 28(2):43. DOI: 10.11835/j.issn.1674-4764.2006.02.013
Abstract:A biaxial plane-strain apparatus for investigating the deformation and failure features of rock is improved and constructed on a passive stiff-frame concept;furthermore,a new device inducing confinement on both sides of the prism specimen was designed and built,which can not only impose varying confining pressure on the specimen,but dynamically monitor the change in confinement due to deformation of the specimen during testing.Theoretical analysis and test results show that for rock specimens with Young's modulus below 14.16GPa,the apparatus can provide an acceptable plane-strain condition and be of practical use.
ZHAO Can - hui , ZHOU Zhi - xiang
2006, 28(2):47-51. DOI: 10.11835/j.issn.1674-4764.2006.02.014
Abstract:The non-linear seismic response behavior of concrete filled in steel tube(CFST) arch bridge subjected to synchronous seismic excition and multi-support seismic excitation is studied in this paper.The non-linear seismic response of CFST arch bridge is calculated by time-history analysis method,and the effect of geometric nonlinear to long-span CFST arch bridge is studied.The influence of internal-force and deformence under dead-load,multi-support seismic excitation,etc to nonlinear seismic response behavior of CFST arch bridge is analysed.The result show that the effect of geometric nonlinear to long-span CFST arch bridge is obvious.
ZHU Rui- jun , GAO Qian , QI Gan
2006, 28(2):52-55. DOI: 10.11835/j.issn.1674-4764.2006.02.015
Abstract:The building settlement near a foundation pit project in Yanzhou is calculated by using calculation method related to settlement of the soil near a foundation pit, Comparing and analyzing calculated settlement values with measured settlement ,the reason for the gap between theoretically calculated values and measured settlement values is pointed out, On the foundation of careful research and analysis of the measured building settlement values ,the factors influencing the settlement of building near the foundation pit are summarized. Finally, according to practical measured values and influ- encing factors, how the settlement of building near the foundation pit is influenced was carefully analyzed. A conclusion that has practical role in Engineering is presented,which can serve reasonably for instructing foundation pit retaining design.
JIAO Chu -jie , SUN Wei , ZHOU Yun
2006, 28(2):56. DOI: 10.11835/j.issn.1674-4764.2006.02.016
Abstract:Using WAW-2000 a multifunction servo-controlled testing machine,uniaxial quasi-static compression experiments for the steel fiber reinforced concrete(SFRC) were conducted with three strain rates.The volume fraction(V_f)of SFRC ranged from 0% to 3%,and the matrix was C50 concrete.The whole stress-strain curves of matrix and SFRC were obtained,and the results showed that with the increase of V_f,the compressive strength increased slowly,while the toughness increase quickly.With the increase of the strain rate,the strength of SFRC increased,but the toughness decreased,and the more the Vf,the less decreasing of the toughness.The results also showed that the elastic modulus and Poisson's ratio of SFRC were not sensitive material parameters,and with the increase of V_f,the former raised slightly and the latter decreased a little,respectively.A well suited numerical expression of the compressive stress-strain curve applicable to SFRC was put forward.
ZHANG Li - ming , WANG Zai - quan , YIN Ying , SUN Lin - na
2006, 28(2):59. DOI: 10.11835/j.issn.1674-4764.2006.02.017
Abstract:According to the strain nonlinear softening constitutive model having inflexion point after peak stress of practical rock and considering intermediate principal stress, the plastic zone of circular cavern with liner under the condition of uniform pressure is analyzed. The elasto - plastic boundaries both for the lining and surrounding rock are discussed. The stress distribution law is different due to the different position of elastic - plastic boundary. Based on this, different stress formulas are gained. The critical pressure caused by excavation of cavern leading to the yield zone and that caused by inner pressure leading to the yield of the liner and surrounding rock is introduced.
MENG Huan - ling , SHEN Pu - sheng
2006, 28(2):62-65. DOI: 10.11835/j.issn.1674-4764.2006.02.018
Abstract:The shear lag effect in frame-tube structures can be neglected when the ratio of beam's span to height increases to some degree,and its behaviors comes close to the behaviors of frame structures.The maximum ratio of beam's span to height is obtained by the equal side-sway of two structures.The structure should belong to frame structures when its ratio of beam's span to height exceeds the critical value.Otherwise,it should belong to frame-tube structures.According to the analysis of the various parameters,some influence factors can be obtained,and the process to distinguish the two structural systems is given.It is shown that this method is accurate and convenient enough for use during the preliminary stage of design.
HU Guo - zhong , WANG Hong - tu , JIA jian - qing , LI Kai - xue , PANG Cheng
2006, 28(2):66-71. DOI: 10.11835/j.issn.1674-4764.2006.02.019
Abstract:In this paper,integrating the principium of demolition blasting of buildings and the practice,the general mechanism and affection factors of blasting harms such as blasting shock,collapsing shock,blasting rock,blasting shock wave and blasting noises produced in demolition blasting of buildings are analyzed.The safety problems existed in demolition blasting of buildings are discussed from three aspects such as the unsafe behavior of "person",the unsafe state of "substance"and the unsafe condition of "environment".Based on an engineering example,the difficulty of safety blasting of engineering example was analyzed,on this basis,corresponding effective safety defending measures and the method of safety control are brought forward.This study is significant to the construction safety and control of demolition blasting of similarity tower building in practice.
YANG Chang - hui , ZHOU Rong , WANG Zi - qiang , LIU Ben - wan , CHEN Ke
2006, 28(2):72-73. DOI: 10.11835/j.issn.1674-4764.2006.02.020
Abstract:混凝土同条件养护等效养护龄期影响因素众多,本文对其中的两个因素——混凝土的凝结时间及其所用水泥种类的影响作了模拟试验研究,以期为工程应用作参考。
TIAN Yi - mei , WU Mi - fang , Wang Yang
2006, 28(2):74-78. DOI: 10.11835/j.issn.1674-4764.2006.02.021
Abstract:Support vector regression(SVR) algorithm is an application of structural risk minimization principle in function regression.In this paper,a residual chlorine prediction model based on SVR is established by using the data of manual sampling residual chlorine of water distribution system in a certain city in the north of China.SVR model is compared with the artificial neural network and multivariate linear regression.The result shows that SVR model has better generalization ability for small samples,the predicted average relative error of all monitoring points is 1.80%~8.73%,and can achieve unique and globally optimal solutions.It is practical and can solve the problem for small samples of residual chlorine when the fit precision of model is good but the predicted effect is worse.
ZHOU Zhi -ming , LIN Yong , LI Xiao- hong , LU Yi -yu
2006, 28(2):79-82. DOI: 10.11835/j.issn.1674-4764.2006.02.023
Abstract:Laboratory column leaching tests were conducted with simulated acid rain with pH values of 2.50,3.50,4.50 and 5.60 respectively,to study yellow soil taken from the Three Gorges Reservoir Region.The results showed that the buffer function of yellow soil against acid rain weakened after a long time of leaching,and acid rain of a lower pH exerted stronger impact on the acidification of the soil.The electric conductance (EC) of the leachates through different soil layers first increased,and then decreased.There is an EC peak occurred in the range of simulated acid rain addition,with the shape of the peak obviously different.The Al leaching loss of the soil increased when the acid rain was more acidic.
LI Dong- wei , YUAN Xue , LI Dou , WANG Ke -hao , YANG Jian
2006, 28(2):83-85. DOI: 10.11835/j.issn.1674-4764.2006.02.024
Abstract:Based on two-phase anaerobic mechanism, a processing reactor was designed;and the waste water with high concentration discharged in the process of production of Chinese traditional medicine is carefully analyzed by the use of GC-MS.The results obtained in the experiment show that the by-products of hydrolization and acidification increase instead of the reduction of organic matters' sort,and at the same time that the number and the amount of compounds in the eventual processed water are apparently reduced,the acid-producing reactor may decompose compounds with great molecule into those with small molecule and accordingly improve the biologically processing ability.
He YouFang;Yin GuangZhi;Zhang DongMing
2006, 28(2):86. DOI: 10.11835/j.issn.1674-4764.2006.02.025
Abstract:Steel-plastic composite geogrid enjoys greater reinforcement effect than other types of geogrid due mainly to its special design and structure,such as deliberately roughed rib surface to enhance its surface roughness and friction coefficient.Hence,engaging force together with interface friction raises the reinforced soil's stability.Tests of pull-out on varied size of steel-plastics composite geogrid have been performed with copper tailing as filling soil,and interaction parameters of shearing intensity and pseudo-friction coefficient between geogrid and copper tailing are obtained.In addition,other influence factors have been discussed.
LI Ying -jian , SUN Hui - bin , WU Ying -jian , LIAO Chuan - dong
2006, 28(2):89-93. DOI: 10.11835/j.issn.1674-4764.2006.02.026
Abstract:根据近年来深圳地区夏季气候变迁的特征,通过焓差法和数值积分法试差验算在用冷却塔设备的工况变化,分析设计工况和超设计工况条件下的冷却塔气液比、冷却水温和传递单元数与气候条件的关系,得出满足该冷却塔出口水温θ=32℃的气候条件是t=34℃,φ=0.78,并试差计算该冷却塔在超设计工况运行条件下的冷却水温度。
ZHANG Zi - xian , LIU Jia - chun
2006, 28(2):94-98. DOI: 10.11835/j.issn.1674-4764.2006.02.027
Abstract:In this paper,the reliability calculation models of water delivery pipeline system with setting up communicating tubes are studied by net decomposition method.The calculation results show that the reliability of water delivery pipeline system may be lowered or increased with increment of the communicating tube number,and the influence of reliability variety of tubulation of delivery main pipeline and T branch pipe is a sensitive factor influencing the reliability of the system.Therefore,the research results have the important leading meaning to the design,the choice of subassembly,the construction installation,maintenance management of the water delivery pipeline system,and looking for path with the biggest reliability of the system.
YUAN Yun - song , LONG Teng - rui , ZHAI Jun
2006, 28(2):99-102. DOI: 10.11835/j.issn.1674-4764.2006.02.028
Abstract:人工湿地是投资低、能耗低的一种污水处理技术,对于小城镇污水处理有着重要的意义。主要介绍了一种复合人工湿地的运行情况、处理效果及重庆地区一部分水生植物对湿地的适应性,实验结果表明水力停留时间对人工湿地的处理效果有着重要的影响,在36h的水力停留时下,人工湿地的处理效果达到了《城镇污水处理厂污染物排放标准》一级B类标准的要求,并为西部地区的人工湿地设计提供一定的参考。
JIN Zhen - xing , LI Bai - zhan , ZHENG Jie
2006, 28(2):103-106114. DOI: 10.11835/j.issn.1674-4764.2006.02.029
Abstract:Currently the air pollution in Chongqing is mainly caused from burning coal and there is a decreasing trend because of the effective treatment. However, due to the urban development and the inflating quantity of automobile in Chongqing, the amount of the traffic exhaust is increasing gradually. To take measures against the traffic exhaust in advance based on the air pollution trend can reduce the difficulty and the cost of controlling the air pollution in Chongqing in the future. This paper analyzes the factors causing the traffic exhaust pollution in Chongqing, and puts forwards some control measures.
YANG Yu , XIE Lin- lin , ZHANG Yuan -lin , XU Hua
2006, 28(2):107-110. DOI: 10.11835/j.issn.1674-4764.2006.02.030
Abstract:The necessity of the public's participation in decision-making of public projects,the functions of the public's participation,and the current characteristics of the public's participation in China were discussed firstly.Then,three suggestions are brought forward to improve the public participation in decision-making of public projects: the first one is to ensure the legal status of the public's participation,the second is to detail contents of entity and process and the third is to set up the public hearing system of public projects.
FENG Wei -min , ZHU Jun , LI Jia- rong
2006, 28(2):111-114. DOI: 10.11835/j.issn.1674-4764.2006.02.031
Abstract:The risk probability analysis is a difficult problem in real investment risk decision-making.Traditional analyses methods of sensitivity and probability can not be used to change the decisions and adjust the development of practicality.Using the methods of BAYES and decision tree,this paper introduced the application method and relational decision rules of BAYES in real investment risk decision-making by a case.
WU Yan - xia , WANG Lei , YIN Zhong - min
2006, 28(2):115-119136. DOI: 10.11835/j.issn.1674-4764.2006.02.032
Abstract:By analyzing the kinds of risk and participants in project financing in ject financing risk distribution through the game theory analysis is studied. The this paper, the optimal principle of proauthors use the fuzzy analytic hierarchy process to establish the participants risk matrix, then, solve the matrix through Hungarian Algorithm according to the principle of risk effective distribution. After optimization,the best one who should undertake the risk will be decided.
LIAO Yu - ping , YAO Bing , LIU Yi - sheng
2006, 28(2):120-123. DOI: 10.11835/j.issn.1674-4764.2006.02.033
Abstract:Construction industry is not only the pillar industry in national economy,but also the typical industry with intensive labors.As a major part of the construction industry,the Construction Employment System(CES) is an important factor of the market order,as well as the quality,the safety and the development of the industry.It is also an important part for building a harmonious society.It concerns the social harmony,political harmony,societal harmony,cultural harmony,urban-rural harmony,etc.However,at present,there are still many problems in CES that might influence the harmonious society building.This paper advises to speed up the reformation of CES,to establish and consummate the system of construction labor subcontract,to develop vigorously labor subcontract corporations,to improve the quality of the labors,to ensure the rights and interests of the labor.
ZHOU Ren - qiang , ZHEN Zhou - lian , TAN De - jing
2006, 28(2):124-127. DOI: 10.11835/j.issn.1674-4764.2006.02.034
Abstract:The paper has expounded the fact that the great majority of construction enterprises before setting up one's own ration of enterprise yet,choose the correct bid tactics,carry on the overall analyses of expense,combine enterprise's own actual conditions,use the inventory pricing method bid skill of the project amount rationally,control the fabrication cost of the project,win a bid in a situation that it is rational and is not lower than cost project fabrication cost.
2006, 28(2):128-131. DOI: 10.11835/j.issn.1674-4764.2006.02.035
Abstract:Urban land-lease becomes an important way of paid land use,but the study of this way seems weak. This essay concentrates on three major issues: the Connotation,Rights Structure and Measure of Land Rent.The author clarifies the meaning,scope and forms of the urban land-lease,which differs from the lease of the land use right,specifies the rights structure especially the rights of the tenant and analyzes the principles,standards and ways of the land rent.In all,this essay puts forward a practical analysis for bettering the urban land-lease.
XIAN Ji -Cheng , GAO Xu , GUO Jing- Song , ZHOU Jian
2006, 28(2):132-136. DOI: 10.11835/j.issn.1674-4764.2006.02.036
Abstract:Three measures of sludge(mixed liquid) return(pump-lift,impeller-lift and air-lift) about nitrogen and phosphorus removal processes are introduced and analyzed.The measures of impeller-lift and air-lift can not only simplify processes and integrate the devices for nitrogen and phosphorus removal so that the land occupation and investment demand for the plant are reduced,but also can be easily operated with less electricity consumption,which are considered to be promising for application in medium-sized and mini-type plant of wastewater treatment.
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