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점토 지반에서의 지주식 흙막이의 하단부 고정 효과에 관한 연구
이호수 부산대학교 산업대학원 2013 국내석사
Abstract Inclined Earth Retaining Structure Method (IER) was developed based on the poles supporting vine plants. IER is an temporary structure wherein the soldier piles(hereafter will be referred to as front support) and stabilizing pile(hereafter will be referred to as back support) are installed at an angle and integrated into a single structure. The installation of the back support effective distributes the earthpressure acting on the front support thereby increasing the structural stability of the temporary. Due to its structural formation, the front support and back support are integrated thereby reducing lateral displacement. In addition, it has good workability and constructability due to the absences of wales and struts, free use of the whole excavation area for the construction of underground structures which makes it economical and other advantages when compared to other earth retaining method that uses bracing. In this study, laboratory model test was performed by varying the fixity of the back support, installation angle of the front support and parameters to determine the fixed end effect of the back support in clay soil. Based from the results, it was determined that when both the lower end of the front and rear support are free then the front support must be installed vertically while it is advantages to install the front support at an inclined position when the back support is fixed or parallel.
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조립식 지주옹벽(AER옹벽) 배면지주의 면적비에 관한 실험적 연구
배승현 부산대학교 산업대학원 2013 국내석사
Abstract Domestic Constructed retaining wall kinds are L-shaped retaining wall, reverse T-shaped retaining walls, gravity retaining walls and the like. Most of these sites to promote a retaining wall, a portion of the cut slope or embankment construction will be as if retaining structures. In this case, the role of the retaining wall of the active earth pressure baemyeonbu the slope of the structure that will serve as support. AER used in this study of the existing L-shaped retaining wall retaining wall back earth the added form is composed of factory- made structure in the field is to assemble. In addition, the effect of back earth due to the reduction of earth pressure and constructability, economy, reliability, adaptability, etc. This excellent site is an excellent method. The AER clarify the effect of the retaining wall back earth to be reflected in the design verification is necessary. Therefore, in this study, AER of the retaining wall back earth the resistance back to the area to investigate the earth of change in the number of model tests were carried out, back earth, back earth the width of the area ratio is defined as the ratio between the distance and the design back earth that can be applied to the area ratio of the horizontal displacement of the retaining wall AER found a relationship.
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준설매립지반에 적용된 개별진공압밀공법의 진공압 효율에 관한 연구
배종혁 부산대학교 산업대학원 2013 국내석사
Abstract In this study, improvement of soft ground during dredging Reclaimed isotropic shear effects are minimized individual vacuum consolidation method to analyze the applicability of the on-site physical Busan New Port Hinterland oo sector work done in the construction field measurement data through the analysis results were as follows. (1) ground subsidence Edition measurement data before and after the subsidence of the vacuum through the characteristics of each through the hyperbolic law by calculating the expected settlement of the ground load effective stress embankment minutes minutes minutes except for the vacuum consolidation derived indirectly by the physical vacuum is applied initial analysis of the efficiency compared to average of 43% (from 25.6 to 60.1%) reduction in boyeoteum results. (2) the individual vacuum consolidation method of consolidation due to the isotropic nature of the behavior and at the same time vertical horizontal vertical settlement due to the inward displacement effect is somewhat likely to reduce the efficiency, and also the time of the construction of a lack of management control system vacuum leak in We believe that the phenomenon is accompanied. (3) the future design of the individual vacuum consolidation method of reducing the efficiency of the vacuum pressure ratio (decrease Tue) should reflect. If you want to apply the vacuum pressure alone can lower the effect is thought to occur. In this field, the vacuum method to improve the efficiency and seongtojae've shown the results of the parallel construction is recommended because the parallel construction.
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신기해 부산대학교 산업대학원 2013 국내석사
Abstract Recently, the traffic volume has drastically increased not only in major cities but also in towns. In order to cope up with the increase in traffic volume, construction of new road and expansion and linear improvement of existing roads are in progress. Soft clays, loose silty soils and organic soils are types of soft soils that can not support the weight of the superstructure during road construction. If roads, bridges and other structures are construction on soil composed of soft clays or organic soils then excessive settlement and stability problems due to insufficient bearing capacity will occur. For ground consisting of soft soil, there are many cases wherein consolidation and compaction by loading is performed for a certain period of time to determine if the bearing capacity can support the weight of the superstructure. Roads that are constructed on soft soil has the tendency to settle due to increase vehicle load, road surface to rapture and uneven portions to occur which may cause traffic accidents. Therefore soil improvement is required for road construction on soft soil. After excavation, the road subgrade for the Busan⋅Jinhae Free Economic Zone Construction Mium District Section 3 was constructed using embankment materials that satisfy the specification standards and were properly compacted. But the underground water in the surrounding area is high so the subgrade materials is almost saturated and is in its weakened state. Generally replacement method is used for road construction in this type of soil. The subgrade soil bearing capacity ratio(CBR) is used for the replaced soil and is usually verified using the Field California Bearing Ratio Test. In general, determining the required replacement depth for the replacement method is a problem. In this study, the soil bearing capacity increase of the road subgrade in Mium District was analyzed and a formula for the computation of the simple and economical replacement depth was recommended.
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