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Improvement of Strength and Consolidation Properties of Clayey Soil Using Ceramic Dust
Md. Akhtar Hossain,
Md. Rashel Afride,
Naimul Haque Nayem
Issue:
Volume 7, Issue 2, March 2019
Pages:
41-46
Received:
20 March 2019
Accepted:
26 April 2019
Published:
15 May 2019
Abstract: The ceramic industry, which comprises with wall tiles, bricks and roof tiles, floor tiles, sanitary accessories, refractory materials and ceramic materials for domestic and other uses, is generating a huge amount of ceramic wastes. Therefore, their problem of disposal is also a great concern. This research delineates the effects of waste ceramic dust on strength and consolidation characteristics of clayey soil. Soil samples were prepared with the inclusion of various proportion of ceramic dust with clayey soil. The test results indicate that Atterberg limits, optimum moisture content, compression index and swelling index decrease due to inclusion of different percentages of ceramic dust with the studied clayey soil. On the other hand, maximum dry density and soaked California Bearing Ratio (CBR) value increase with the increase of inclusion of ceramic dust upto 20%. Further addition of ceramic dust had negative effects on these strength properties. It is recommended that ceramic dust upto 20% may be used for improving the detrimental properties of clayey soil.
Abstract: The ceramic industry, which comprises with wall tiles, bricks and roof tiles, floor tiles, sanitary accessories, refractory materials and ceramic materials for domestic and other uses, is generating a huge amount of ceramic wastes. Therefore, their problem of disposal is also a great concern. This research delineates the effects of waste ceramic du...
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Comparative Analysis of Total Station Measuring Inclination and Settlement
Issue:
Volume 7, Issue 2, March 2019
Pages:
47-51
Received:
19 April 2019
Published:
23 May 2019
Abstract: Total station to measure the inclination of high-rise building is the important way to detect the perpendicularity of the building, the settlement measurement is an important means of building deformation analysis, the use of settlement measurement data can be indirectly calculated building oblique. This paper uses 2016.6-2018.07 high-rise building level observation data and total station tilt observation data. The article introduces the inclined deformation measured by total station instrument without prism, the inclined deformation calculated by level measuring settlement, and the inclined deformation calculated indirectly by plane regression method. Data analysis time three stages, the first stage, the construction of buildings to the overall level of half, the second stage, general building construction completed, the third stage, the overall building completed half a year, in the three stage, two methods of measuring calculation of slope deformation may be inconsistent, the article analyses the reasons for not consistent, the corresponding conclusion, through the periods of tilt calculation can obtain continuous tilting deformation law, two methods to confirm each other, make sure the safety of the whole construction process and the stability of the building. The applicability of plane regression tilting deformation is illustrated, and the practicability and reliability of total station measurement analysis method and plane regression analysis method in building tilting deformation analysis are illustrated with examples.
Abstract: Total station to measure the inclination of high-rise building is the important way to detect the perpendicularity of the building, the settlement measurement is an important means of building deformation analysis, the use of settlement measurement data can be indirectly calculated building oblique. This paper uses 2016.6-2018.07 high-rise building...
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A New Design Methodology for Carrying Capacity of Hot Rolled I Section Steel of Local Buckling: The Overall Interaction Concept
Jiajing Liu,
Weining Yuan,
Hu Xiong,
Yihao Xu
Issue:
Volume 7, Issue 2, March 2019
Pages:
52-58
Received:
21 April 2019
Published:
15 June 2019
Abstract: Through the finite element software ABAQUS, the finite element model considering the initial imperfection and residual stress is established, and the finite element results are compared with the collected test results to verify the reliability of the numerical model. By analyzing the ultimate carrying capacity of I section of axial compression with different aspect ratios, the design method of ultimate carrying capacity of axial compression members of hot rolled I section from thick to thin is studied. The result of Overall Interaction Concept (OIC) for hot rolled I section steel under axial compression is obtained by using the finite element calculation results, and the results are compared with the Eurocode (EN1993-1-1) and the Chinese steel structure design standard (GB50017-2017), so as to study the accuracy of the recommend design method. Results found that: i) the calculation result from EC3 of the cross section classification concept most conservative or unsafe, ii) the results from GB almost all conservative, iii) comparing with the existed design methods the OIC design method reflect the relationship between carrying capacity and the the generalized relative slenderness, that can accurately predict ultimate carrying capacity. Research shows that OIC is a more effective and accurate method.
Abstract: Through the finite element software ABAQUS, the finite element model considering the initial imperfection and residual stress is established, and the finite element results are compared with the collected test results to verify the reliability of the numerical model. By analyzing the ultimate carrying capacity of I section of axial compression with...
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Water Hazard Characteristics of Dabaoshan Atypical Karst Tunnel
Liu Shao-Ming,
Chen An,
Liu Hao,
Luo Sha-Sha
Issue:
Volume 7, Issue 2, March 2019
Pages:
59-63
Received:
22 April 2019
Published:
15 June 2019
Abstract: To study the water hazard characteristics of DaBaoshan atypical karst tunnel. Engineering geological and hydrogeological mapping and survey, water connection test, tunnel water hazard investigation, theoretical calculation and analysis are used. The results show that the lithology of the DaBaoshan tunnel is argillaceous limestone, limestone, carbonaceous shale limestone, limestone and inferior coal seam, which is an atypical karst tunnel. There are three karst collapses, but there are not perennial water bodies on the surface of tunnel hill. In the rainy season, there are gushing water and mud in the tunnel, the water source of tunnel water hazard is rainfall, and the gushing water channels are surface collapse, dissolved crack and fissure. The calculation results show the rainfall intensity are 7.84mm/h, 8.44 mm/h, 9.18mm/h, 10.17 mm/h respectively, the rainfall time that lead to the gushing water exceeds the drainage capacity of the gutters are 2.5h, 2.2h, 2.0h, 1.8h respectively. And when the rainfall intensity is 33.3mm/h, the rainfall time is only 35min. The tunnel gushing water causes a lot of water, mud and sands flows on the road which endangers traffic safety, even causing traffic accidents.
Abstract: To study the water hazard characteristics of DaBaoshan atypical karst tunnel. Engineering geological and hydrogeological mapping and survey, water connection test, tunnel water hazard investigation, theoretical calculation and analysis are used. The results show that the lithology of the DaBaoshan tunnel is argillaceous limestone, limestone, carbon...
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