A study on surface settlement characteristics according to the cohesive soil depth through laboratory model tests

Young-Joon Kim; Che-Geun Im; Se-Gu Kang; Yong-Joo Lee

doi:10.9711/KTAJ.2014.16.6.507

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2014 Vol.16, Issue 6 Next Page

A study on surface settlement characteristics according to the cohesive soil depth through laboratory model tests 실내모형시험을 통한 점성토 지반의 토피고에 따른 지표침하 특성연구

30 November 2014. pp. 507-520

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Abstract

In this study, the surface displacement was investigated according to the various depth of cover when the tunnel excavation equipment was used in a clay soil. For this the laboratory scaled model test was carried out using the soil sample similar to the in-situ conditions. We carried out four tests according to tunnel depth(1.5D, 2.0D, 2.5D, 3.0D). The distribution of impact due to tunnelling was quantitatively analyzed in the three-dimension by measuring the surface displacement. In addition, the pattern of surface displacements was figured out.

Keywords

Laboratory scaled model test

Cohesive soil

Depth of cover

Excavation machine

본 연구는 점성토 지반에서 터널 굴착장비를 이용하여 터널을 굴착할 때 토피고 변화에 따라 발생하는 지표변위 특성을 고찰하였다. 이를 위하여 현장조건과 유사한 시료를 이용하여 실내축소모형시험을 수행하였다. 토피고에 따라 1.5D, 2.0D, 2.5D, 3.0D의 총 4개의 Case 에 대하여 모형시험을 수행하였다. 이러한 모형시험을 통하여 터널굴착 시 발생하는 지표변위를 측정하여 3차원적 영향분포를 정량적으로 분석하였으며, 더불어 변위양상도 규명하였다.

키워드

실내축소모형시험

점성토 지반

토피고

굴착장비

References

1.Attewell, P.B. (1977), “Ground movements caused by tunnelling in soil”, Proceeding of Conference on Large Ground Movements and Structures, Cardiff, England, pp. 812-948.

2.Hobbs, D.W. (1969), “Scale model study of strata movement around mine roadways. IV. roadway shape and size”, Int. J. of Rock Mech. Min. Sci., Vol. 6, pp. 305-404.

3.Ghaboussi, J., Ranken, R.E., Karshenas, M. (1978), “Analysis of subsidence over soft ground tunnels, evaluation and prediction of subsidence”, ASCE, pp. 182-196.

4.Lee, K.M., Rowe, R.K. (1990), “Finite element modelling of the three-dimensional ground deformations due to tunnelling on soft cohesive soils : Part II - result”, Computers and Geotechnics, 10, pp. 111-138.

5.Lee, Y.J., Ryu, C.Y. (2010), “Determination of K values from tunnel model tests in sandy ground”, Tunnelling Technology, Vol. 12, No. 1, pp. 87-94.

6.Pantet, A. (1991), “Creusement de galeries a' Faible profondeur a' I'aide d'un tunnelier a' pression de boue: mesures in situ et e'tude the'onique du champs de de'placements”, These de doctorat, INSA, Lyon.

7.Peck, R.B. (1969), “Deep excavations and tunnelling in soft ground. state of the art report, proceedings of 7th international conference on soil mechanics and foundation engineering”, Mexico City, State of the Art Volume, pp. 225-290.

8.Schmidt, B. (1969), “Settlements and ground movements associated with tunnelling in soil”, Ph.D thesis, University of Illinois.

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 :6
Pages :507-520
Received Date : 2014-09-18
Revised Date : 2014-09-29
Accepted Date : 2014-10-02
DOI :https://doi.org/10.9711/KTAJ.2014.16.6.507

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

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