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15 October 2005, Volume 24 Issue 5 Previous Issue    Next Issue

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Research on brittleness wreck of prestressed concrete box-beams ZHOU Rui ，ZHOU Zhi-xiang ， SHAO Xiao-kang ， SONG Lei 2005, 24(5): 1-4.  Abstract ( )   PDF (233KB) ( )   Based on the experiment of a 30m-span prestressed concrete box-beam, the brittleness destroy when load less then high-point one has been analysied. It is suggested that the disadvantaged effect of reaction from the prestressed steel to the box because of the distortion must be numbered in the prestressed concrete box-beam which prestressed steel was placed in the soleplate.And based on this theory, a suggested computationsal formula of the thickness of the safeguard concrete above the prestresse References | Related Articles | Metrics

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The project design for repairing and strengthening of the reinforced concrete beam of the Yaan bridge CAO Lie-fang,ZHOU Zhi-xiang 2005, 24(5): 5-9.  Abstract ( )   PDF (181KB) ( )   In city development of economy and structre bring traffic and carrying capacity of vehicle on increasingly. The reinforced concrete beam of the YaAn Bridge couldn’t bear actual load. In order to improve bearing capacity of the YaAn Bridge,augment the steel ratio of the reinforced concrete beam. In this paper ,the project design for repairing and strengthening of the reinforced concrete beam is introduced References | Related Articles | Metrics

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A special application of temporary steel bridge in heavy-cargo transportation QIAN Hong，MENG Yun，ZHANG Hui-li，LIU Yah-ke 2005, 24(5): 10-13.  Abstract ( )   PDF (203KB) ( )   There are 120 bridges and culverts in the way of the heavy-cargo transportation of Kaixian Baihe Powerplant, Chongqing,57 bridges of them were used the co-bearing pass program of Prestressed Temporary Steel bridge combined with Partly Bearing Pier.The pass program saved much consolidating cost.The paper introduced the details of the program to deal with the less stiffness of 20m span Prestressed Temporary Steel bridge and the whole calculation of the design References | Related Articles | Metrics

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Application of fuzzy comprehensive evaluation method in arch technology condition ZHANG Yong-shui 2005, 24(5): 14-17.  Abstract ( )   PDF (150KB) ( )   Through summing up main defects of arch, check items,standard and weight number of arch technology condition are defined. the paper estimated classification of arch technology condition. Providing a new method of assessment arch technology condition for maintainer References | Related Articles | Metrics

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Research on the prediction of stable displacement and unstable time on highway tunnel XU Lin-sheng 2005, 24(5): 18-20.  Abstract ( )   PDF (159KB) ( )   According to the features of displacement-time curves, we use grey Verhulst model of creature increase to forecast the stable displacement and use Verhulst inverse-function model to forecast the unstable time of highway tunnel surrounding rock. Examples are applied to check and prove the prediction models,the construction is controlled References | Related Articles | Metrics

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Concerning structural research of asphalt substance state JING Yan-ping 2005, 24(5): 21-24.  Abstract ( )   PDF (167KB) ( )   This paper according to different appearance state and its property of asphalt under the different environment temperature condition, by the GPC, DMA and IR to analyze , bring upped the new viewpoint to asphalt molecular structure, the Substance state structure of asphalt, expounded the variety relation of the structure and temperature of asphalt from the asphalt molecule lay References | Related Articles | Metrics

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A Rustics opinion on ductility of SBS modified asphalts YUAN Jian—an 2005, 24(5): 25-28.  Abstract ( )   PDF (211KB) ( )   In this paper, significance of ductility of SBS modified asphalts is explained through contrast difference in ductility of modified asphalts and asphalt. There is some discussion about SBS modified asphalts mechanism, and several factor that effect on ductility of SBS modified asphalts is analyzed in this paper References | Related Articles | Metrics

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Research on nonlinear property and granular cushion modulus of granular cushion asphalt pavement LI Hai-yuan，ZHENG Chuan-chao 2005, 24(5): 29-33.  Abstract ( )   PDF (241KB) ( )   In the paper,based on the multi-layer elastic system theory and nonlinear material constitutive model of granular cushion,the resilient moduli of granular cushion is analysed.Simultaneously,the computing program is designed and programmed,which computes the resilient moduli of special points in granular cushion.In addtion,the contour of the resilient moduli are drew in granular cushion.Eventually,finite element program is employed to carry out the linear analysis and nonlinear analysis of semi-r... References | Related Articles | Metrics

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Framework design of pavement management dystem nased on GIS LI Ming ，LI Tei-qiang 2005, 24(5): 34-38.  Abstract ( )   PDF (216KB) ( )   According to design principle and function requirements of system, based on simple introduction on the definition of pavement management system and geographical information system, framework structure of system was designed. At the same time, structure and function of module of the system were described in detail References | Related Articles | Metrics

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Application of ground penetrating radar in the survey of the layer thickness in road DENG Chun-wei，XU Hong-WU，SHAO Yan 2005, 24(5): 39-41.  Abstract ( )   PDF (170KB) ( )   This paper briefly introduces the application of Ground Penetrating Radar(GPR) in testing the subsurface layers thickness. By testing example, it not only tells us that this method is true in practice, but also gives us a new way in testing subsurface layer thickness References | Related Articles | Metrics

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Numerical simulation study on the law of earth pressures on the culvert beneath high embankment and the factors of effect on the earth pressures YANG Xi-WU 2005, 24(5): 42-47.  Abstract ( )   PDF (259KB) ( )   The law of earth pressure on the culvert changing with the height of fills and the arch action are investigated by model test and numerical simulation. The results of model testing and numerical simulation indicate that as the fills on the culvert reach a higher of height the arch action will come and the earth pressures increase non-linearly with the height of fills, and in addition the earth pressures can be indirectly affected by the boundary condition of culvert sitting . It is also confirme References | Related Articles | Metrics

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Research on performance test of lime-flyash stabilized coal spoil used as the base of pavement HUANG Wei-rong1， CHEN Kai ， HE Zhao-yi，RAN Long-fei 2005, 24(5): 48-52.  Abstract ( )   PDF (202KB) ( )   In this paper, physis-mechanics property of lime-flyash stabilized coal spoil is studied . through the research, lime-flyash stabilized coal spoil and lime-flyash stabilized coal spoil and shale soi used as pavement base of county road in lacking aggregate district is superiority and reasonable References | Related Articles | Metrics

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The influence and analyse of fly ash with high sulphur content on expansion cracks of lime-fly ash base GAO Yan-long ， HUANG Xing ， LIU Feng 2005, 24(5): 53-55.  Abstract ( )   PDF (194KB) ( )   The sulfur amount of fly ash has a substantial influence on the intensity and stability of road base course. Elicited from an engineering case, this paper discusses and analyzes the mechanism of road base course expansion cracks,intensity decrease, and final destruction caused by high sulfur content fly ash, which is testified by indoor and outdoor experimentations. And it is also given as a reference of others professionals References | Related Articles | Metrics

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Research on performance test of inorganic cement stabilized coal spoil used as base of county road XU Ran-an ，HUANG Wei-rong ，CHEN Wei ， HE Zhao-yi，RAN Long-fei 2005, 24(5): 56-61.  Abstract ( )   PDF (260KB) ( )   In this paper, physis-mechanics property of cement-flyash or cement or lime-flyash stabilized coal spoil is studied and construction report of experimental road. through the research, inorganic cement stabilized coal spoil used as pavement base of county road in lacking aggregate district is superiority and reasonable References | Related Articles | Metrics

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Research on control design case to sliding unstable rock in FEM TANG Hong—mei 2005, 24(5): 62-64.  Abstract ( )   PDF (173KB) ( )   Hitherto, as one of typical geologic disaster, unstable rock is the coarsest in studies, especially it is in description or semi-quantity stage that identification and classification of unstable rock, stability analyses and control effectively. According to unstable model unstable rock can be classified into three, i.e. sliding unstable rock, toppling unstable rock and falling unstable rock. Up to now, three case usually are provided in stable analyses, i.e. case 1(composed of weight of unstable References | Related Articles | Metrics

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Current Situation of determination methods of shear strength parameters of rock-mass discontinuities and new thoughts LIU Ming-wei, ， FU Hua， WU Jin-liang 2005, 24(5): 65-67.  Abstract ( )   PDF (162KB) ( )   The paper roundly elaborates current situation of determination methods of shear strength parameters of rock-mass discontinuities and synthetically comments. With the progress of experimental instrument and calculation technique, aiming at different engineering demands and limit conditions (funds, techniques), it presents the new thoughts of determination methods of shear strength parameters of rock-mass discontinuities References | Related Articles | Metrics

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