기초침하에 의해 손상된 송전철탑 구조물의 구조성능개선

국문 초록 (Abstract)

일반적으로 송전철탑 부재들의 보강은 적절한 그라우팅재를 활용한 인젝션과 구조 보강재 부착을 이용한 단면 확장에 따른 강성보강 방식을 주로 사용한다. 이와 같은 그라우팅 인젝션 및 단면보완은 주로 축력능력을 확장시키는 데에 의미를 갖는다. 그렇지만 보다 안정적 상태를 유지케 할 수 있는 보강방안이 적극 요구되는데 그 방법은 좌굴에 의해 손상을 받은 부재를 원상태의 길이로 환원시키고, 또한 내부적 보강효과를 동시에 갖는 새로운 부재로 교체하는 것이다. 본 연구에서는 기초침하로 구조적 손상을 받은 송전철탑의 손상회복을 위한 실증적 과정으로 우선 현장에서의 손상도 확인점검과 손상상태 및 회복상태에 대한 수치 해석적 결과를 도출하였고, 새롭게 고안한 잭킹시스템을 이용하여 보강된 부재를 교체하는 과업을 수행하였다. 이 결과는 송전철탑 유지관리의 차원상승 효과를 갖게 한다.

다국어 초록 (Multilingual Abstract)

Generally the capacities of electric power transmission tower's members are improved by increasing their stiffness nature through injection of grout or attachment of other structural stiffeners. Those are for upgrading their axial strength by fulfillment of proper materials into pipe members, increment of member dimension by addition of section, or a combination of the two. However the use of innovative and unusual procedures would be positively recommended for getting more stable state. It is that buckled members are replaced with lengthened and strengthened members. In providing the structural restoration procedures for the existing electric power transform tower whose main members have been damaged due to unequal foundation settlement, structural damage inspection works and numerical analyses for the damaged one and the restored one were done in detail at first. secondarily member-exchanging works using a newly-generated jacking system and strengthened members were achieved. This figures are to point clearly to inherent advantages attending the management of the towers.

참고문헌 (Reference)

1 이호범, "해상송전철탑 구조물의 주기점검을 통한 경년열화 변화특성" 한국구조물진단유지관리공학회 16 (16): 25-33, 2012

2 Han, Sang Mook, "Study on Maintenance Management on Concrete Mat Foundation of the Tansmission Tower Construction of 345kV Yong Heung T/L" 509-512, 2004

3 KEPRI, "Study on Life Cycle Management for the 345kV Electric Power Transmission Tower on Young-heung T/L in Korea" 2004

4 KEPCO, "Research on the Life Management Control for the Young-heung T/L 345kV Electric Power Transmission Tower on the Sea in Korea" 2004

5 ThreeTECH Co., Ltd., "Report on Structural Safety Evaluation and Countermeasure for the No. 108 Electric Power Transmission Tower at islet on Young-heung T/L in Korea" 2006

6 KEPCO, "Management Guidelines for the Foundation of Young-heung Electric Power Transmission Tower on the Sea in Korea"

7 KISTEC, "Detailed Guidance of Safety Inspection and In-depth Safety Inspection in Korea"

8 KEPCO, "Design Standards for the Processing Electric Power Transmission Tower in Korea"

9 KOPEC, "Design Drawings for the I, II Types of SD2 345kV Electric Power Transmission Tower at Sihwa Lake on Young-heung T/L Construction in Korea" 2002

10 KOPEC, "Design Drawings for the I, II Types of SB2 345kV Electric Power Transmission Tower on Open Sea on Young-heung T/L Construction in Korea" 2002

11 KOPEC, "Design Drawings for the I, II Types of SB2 345kV Electric Power Transmission Tower at Sihwa Lake on Young-heung T/L Construction in Korea" 2002