Consideration on design procedure of room-and-pillar underground structure part II: selection of shape to design supports

Chulho Lee; Jinsuk Hur; Younghwan Hyun; Soo-Ho Chang

doi:10.9711/KTAJ.2014.16.5.497

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2014 Vol.16, Issue 5 Preview Page

Consideration on design procedure of room-and-pillar underground structure part II: selection of shape to design supports 주방식 지하구조물의 설계 방법 고찰 Part II: 지보 설계 필요 단면 검토

30 September 2014. pp. 497-506

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Abstract

In this study, in order to suggest the design method for supports in the room-and-pillar underground structure, the case study was carried out. In the case study, shape of rock pillar and room was mainly considered. From the analysis, a displacement at the roof, the maximum principle stress and plastic state were examined. To optimize variables in the case study, cases from the Seoul metro station were analyzed, then a target depth of the underground structure and ground conditions were determined. And the height of rock pillar and room were chosen from the assumed purpose of underground space, i.e. living/office and warehouse. Total cases of analysis was 180 cases including 3 types of ground condition, 5 types of rock pillar and 6 types of roof span. It is expected that results from analysis can be used to determine the installation of support in room-and-pillar underground structure with stability, utilization efficiency of underground space and applicability of vehicles.

Keywords

Room-and-pillar method

Design

Stability

Support

본 연구에서는 동반논문에서 수행한 해석 결과를 이용하여 주방식 지하구조물의 안정성, 공간 활용성, 시공장비 적용성을 검토하였다. 지하구조물 안정성은 강도응력비와 한계변형률 개념을 도입하여 적용하였으며 공간 활용성은 주어진 단면에 대한 공간의 비율로 활용률을 판단하였고 시공장비 적용성은 굴착공사에서 사용되는 대표 장비를 선정하고 장비의 회전반경을 고려하였다. 제안된 일련의 과정을 통해 모두 조건을 만족하는 지하구조물 형상을 선정할 수 있었으며 선정된 단면에 대한 지보재 설계가 가능할 것으로 나타났다.

키워드

주방식 공법

설계

안정성

지보재

References

1.Esterhuizen, G.S., Dolinar, D.R., Ellenberger, J.L, Prosser, L.J. (2011), Pillar and roof span design guidelines for underground stone mines, Department Of Health And Human Services, NIOSH, IC 9526.

2.Lee, C., Chang, S-H, Shin, H-S. (2013a), “A numerical study on evaluation of unsupported pillar strength in the room and pillar method”, J. of Korean Tunn Undergr Sp Assoc, Vol. 15, No. 4, pp. 443-453 (in Korean).

3.Lee, C., Chang, S-H, Shin, H-S. (2013b), “A study on conceptual evaluation of structural stability of room-and-pillar underground space”, J. of Korean Tunn Undergr Sp Assoc, Vol. 15, No. 6, pp. 585-597 (in Korean).

4.Sakurai, S. (1982), “An evaluation technique of displacement measurements in tunnels,” Journal of Geotechnical Engineering, JCSE, Vol. 317, pp. 93-100

5.Sakurai, S., I.Kawashima & T.Otani. (1995), “A criterion for assessing the stability of tunnels.” Eurock’93, Ribeiro e Sousa & Grossmann(eds), pp. 969-973.

6.Sakurai, S. (1997), “Lessons Learned from Field Measurements in Tunnelling,” Tunnelling and Underground Space Technology, Vol. 12, No. 4, pp. 453-460.

7.Hoke, E., Brown E.T. (1980), “Underground Excavation in Rock”, Institution of Mining and metallurgy.

8.Korean Tunnelling and Underground Space Association (2004), tunnel engineering series 1, theory and practice of tunnel, Goomibook Seoul, pp. 345-346 (in Korean)

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 16
No :5
Pages :497-506
Received Date : 2014-09-02
Revised Date : 2014-09-19
Accepted Date : 2014-09-22
DOI :https://doi.org/10.9711/KTAJ.2014.16.5.497

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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