• Title/Summary/Keyword: settlement system

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Stress Monitoring System for Buried Gas Pipeline in Poor Ground (연약지반 배관응력 모니터링 시스템 개발 및 적용)

  • Hong, Seong-Kyeong;Kim, Joon-Ho;Jeong, Sek-Young
    • Journal of the Korean Society of Safety
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    • v.21 no.1 s.73
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    • pp.41-47
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    • 2006
  • This paper introduces stress monitoring system for buried gas pipeline in poor ground. During the six months of improvement construction of poor ground, maximum settlement of gas pipeline is about 40 cm. This value represents relative small compared to the initial settlement estimation of ground improvement construction plan, 90 cm. Also, this paper includes the result of finite element analysis of gas pipeline to confirm safety of pipelines in poor ground. The stress monitoring system for gas pipeline was developed to guarantee the safety of buried gas pipeline in poor ground. Eventually, the ground improvement workings are ended safely and it is proved that the pipeline has no safety problem.

A Study on Economic Characteristics of Two-way Network Interconnection System (통신망 상호접속체계의 경제적 특성분석)

  • Kim, Pang-Ryong
    • Journal of Korea Technology Innovation Society
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    • v.7 no.1
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    • pp.111-129
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    • 2004
  • The issues on the interconnection of telecommunications network are recently prevailed in the IT industry. In this study, we classify the network interconnection system into two categories: two way-same price model and two way-different price model. The purpose of this paper is to analyze economic characteristics of optimal settlement system according to each model. One of the most important policy implications we derive through this study is that symmetry between enterprises is required for policy maker or regulatory agency to set an efficient settlement system under two way-same price model, but that symmetry is not necessarily required under two way-same price model.

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A Study on Plans for Efficient Administration of South-North Commercial Arbitration Commission (남북상사중재위원회 운영의 효율화 방안 연구)

  • Kim Sang-Ho
    • Journal of Arbitration Studies
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    • v.14 no.2
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    • pp.3-46
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    • 2004
  • To realize the spirit of the South-North Joint Declaration of June 15, 2000, the competent authorities of the South and the North of Korea have reached two Agreements to settle commercial disputes as well as to set up an arbitral organization called 'South-North Commercial Arbitration Commission'. The Commission is an institutional organization for settlement of commercial disputes arising from trade and investment between south and north Korea. Under the situation, it is becoming a problem of vital importance how to manage and control the Commission for prompt and effective settlement of south-north commercial disputes. While analyzing the above two Agreements for dispute-settlement mechanism, the author proposes desirable ideas and directions in connection with the Commission as follows: 1. First of all, the Commission should become a central common system for settlement of commercial disputes which meets the demand of capitalistic market economy. 2. The Authorities of south and north Korea should recognize that the availability of prompt, effective and economical means of disputes resolution such as arbitration and conciliation to be made by the Commission would promote the orderly growth and encouragement of south-north trade and investment. 3. The Korean Commercial Arbitration Board(KCAB) should be designated as the Arbitration Commission of South Korea because the KCAB is the only authorized institution in South Korea, statutorily empowered to settle any kind of commercial disputes at home and abroad.

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Analysis of load sharing characteristics for a piled raft foundation

  • Ko, Junyoung;Cho, Jaeyeon;Jeong, Sangseom
    • Geomechanics and Engineering
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    • v.16 no.4
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    • pp.449-461
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    • 2018
  • The load sharing ratio (${\alpha}_{pr}$) of piles is one of the most common problems in the preliminary design of piled raft foundations. A series of 3D numerical analysis are conducted so that special attentions are given to load sharing characteristics under varying conditions, such as pile configuration, pile diameter, pile length, raft thickness, and settlement level. Based on the 3D FE analysis, influencing factors on load sharing behavior of piled raft are investigated. As a result, it is shown that the load sharing ratio of piled raft decreases with increasing settlement level. The load sharing ratio is not only highly dependent on the system geometries of the foundation but also on the settlement level. Based on the results of parametric studies, the load sharing ratio is proposed as a function of the various influencing factors. In addition, the parametric analyses suggest that the load sharing ratios to minimize the differential settlement of piled raft are ranging from 15 to 48% for friction pile and from 15 to 54% for end-bearing pile. The recommendations can provide a basis for an optimum design that would be applicable to piled rafts taking into account the load sharing characteristics.

Consolidation Behavior of Soft Ground by Prefabricated Vertical Drains (연직드레인 공법에 의한 연약지반의 압밀거동)

  • 이달원;강예묵
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 1998.10a
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    • pp.376-381
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    • 1998
  • The large scaled field test by prefabricated vertical drains was performed to evaluate the superiority of vertical discharge capacity for drain materials through compare and analyze the time-settlement behavior with drain spacing and the compression index and consolidation coefficient obtained by laboratory experiments and field monitoring system 1. The relation of measurement settlement( $S_{m}$) versus design settlement( $S_{t}$) and measurement consolidation ratio( $U_{m}$) versus design consolidation ratio( $U_{t}$) were shown $S_{m}$=(1.0~l.1) $S_{t}$, $U_{m}$=(1.13~l.17) $U_{t}$, at 1.0m drain spacing and $S_{m}$=(0.7~0.8) $S_{t}$, $U_{m}$=(0.92~0.99) $U_{t}$ at 1.5m drain spacing, respectively. 2. The relation of field compression index( $C_{cfield}$) and virgin compression index( $V_{cclab}$) was shown $C_{cfield}$=(1.0~1.2) $V_{cclab}$, But it was nearly same value when considered the error with determination method of virgin compression index and prediction method of total settlement. 3. field consolidation coefficient was larger than laboratory consolidation coefficient, and the consolidation coefficient ratio( $C_{h}$/ $C_{v}$) were $C_{h}$=(2.4 ~ 3.0) $C_{v}$. $C_{h}$=(3.5 ~ 4.3) $C_{v}$ at 1.0m and 1.5m drain spacing and increased with increasing of drain spacingngasing of drain spacingng spacingng

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A Study on the Geogrid Reinforced Stone Column System for Settlement Reduction Effect (침하저감효과를 위한 고강도 지오그리드 보강Stone Column 공법에 관한 연구)

  • Park, Si-Sam;Lee, Hoon-Hyun;Yoo, Chung-Sik;Lee, Dae-Young;Lee, Boo-Rak
    • Proceedings of the Korean Geotechical Society Conference
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    • 2006.03a
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    • pp.838-845
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    • 2006
  • Recently construction work in Korea, demands of favorable condition ground had been increased with industrialization acceleration and economic growth. However, because of limited land space, it was so hard to ensure favorable condition grounds that construction work proceeds until soft ground area on plans of road, railroad and industrial complex. In this case, soft ground improvement was required such as a stone column method. Stone column method, making a compaction pile using crushed stone, is a soft ground improvement method. However, stone column method is difficult to apply to the ground which is not mobilized enough lateral confine pressure because no bulging failure resistance. Hence, in present study, evaluates the stone columns reinforced by geogrid for settlement reduction and wide range of application of stone columns. Triaxial compression tests were conducted for evaluation which is about behavior characteristics of stone column on replacement rate. Then, 3-dimensional numerical analysis were conducted for application of stone column reinforced by geogrid as evaluate behavior characteristics and settlement reduction effect of stone column reinforced by geogrid on reinforcing depth change of geogrid.

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Numerical Analysis of Piled-Raft Foundations Considering the Effects of Sand Cushion (샌드쿠션을 고려한 말뚝지지 전면기초의 수치해석)

  • Kim, Nam-Ick;Seo, Young-Kyo
    • Journal of Ocean Engineering and Technology
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    • v.21 no.5
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    • pp.25-32
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    • 2007
  • The piled-raft foundation, a new design concept, is one of the most effective kinds of foundation for reducing settlement of structures. An alternative piled-raft system with disconnection cap and a sand cushion between the pile and raft was also investigated to compare the influence of ultimate bearing capacity and settlement. Load-settlement relation curves were used to evaluate the ultimate bearing capacity. In the numerical analyses, a plane strain elasto-plastic finite element model (Mohr-Coulomb model) was used to present the response of the piled-raft foundation.

A Study on the Implications by the Introduction of TSU/BPO System as a Instrument of Trade Settlement (무역결제수단인 TSU/BPO 제도의 도입에 따른 시사점에 관한 연구)

  • Han, Nak Hyun;Kim, Young Gon
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.60
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    • pp.141-175
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    • 2013
  • The purpose of this study aims to the implications by the introduction of TSU/BPO system as a instrument of trade settlement. Jointly with financial messaging provider SWIFT, the ICC Banking Commission has developed the URBPO to take into account the legitimate expectations of all relevant sectors. Once the goods have been shipped, the seller's bank uploads the shipping and logistics data to the TSU to be checked against the baseline. URBPO is the first ever set of standards in supply chain finance that governs BPO transactions worldwide. BPO enables banks to reduce the risks associated with international trade to the benefit of both buyers and sellers. A BPO is an irrevocable undertaking given by an Obliger Bank to a Recipient Bank to pay a specified amount under the condition of a successful electronic matching of data or acceptance of mismatches. The BPO should be viewed as an exercise in collaboration between trading partners and their banks. Drawings upon global standards and incorporating the benefits offered by letters of credit, the new instrument has the potential to benefit all parties in a trade transaction-and bring trade settlement into the 21st century.

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The Analysis of Lateral Movement at the Top of Retaining Wall in the Downtown Area (도심지 옹벽 상단에서의 수평변위에 관한 사례분석)

  • Bae, Yoon-Shin
    • Journal of the Korean GEO-environmental Society
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    • v.10 no.3
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    • pp.63-71
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    • 2009
  • The movement of in-situ walls has become very important as construction in large cities moves upward, instead of outward. Tall structures typically have deep excavations not on1y to provide extra space for parking, but also to reduce the potential settlement of the building. These large excavations require a robust bracing system to resist the lateral earth pressures as the depth increases. Methods to predict deflections of the retaining systems are of utmost importance because wall movements allow potentia1 settlement of adjacent structures. Case studies will be analyzed and measured waI1 def1ections will be compared with predictions from empirica1ly derived charts.

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Prediction of Long-term Settlement in the Big Reclamation Site Using GIS (GIS 기법을 이용한 대규모 매립지반의 장기침하 예측)

  • 김홍택;이혁진;김영웅;김진홍;김홍식
    • Journal of the Korean Geotechnical Society
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    • v.18 no.2
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    • pp.107-121
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    • 2002
  • In this study, GIS(Geographic Information System), a new approaching method, is proposed to effectively manage long-term settlements in the big reclamation sites. To verify an applicability of the proposed method, the prediction of long-term settlements which may occur in the overall soft deposits of the Incheon International Airport is carried out. During the process of the prediction of long-term settlements, measured settlement data obtained from an early stage of preloading are analyzed in detail. For purposes of the analysis, an estimation of the recompression index is also made based on the Nagaraj's research results. The coefficient of the secondary consolidation is further determined based on the relationship presented by the Mesri & Godlewski, which defines a ratio between the coefficient of the secondary consolidation and the recompression index.