Soil Disturbance of Beijing Subway Constructed by Open-Face Shield Tunneling Method in Sandy Stratum

doi:10.12068/j.issn.1005-3026.2016.04.025

Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (4): 572-577.DOI: 10.12068/j.issn.1005-3026.2016.04.025

• Resources & Civil Engineering • Previous Articles Next Articles

Soil Disturbance of Beijing Subway Constructed by Open-Face Shield Tunneling Method in Sandy Stratum

ZHANG Jian¹， WANG Shu-ying¹， YANG Jun-sheng¹， ZHANG Xi-bao²

1. School of Civil Engineering， Central South University， Changsha 410075， China; 2. China Railway Wuju Group Corporation， Changsha 410205， China.

Received:2015-07-10 Revised:2015-07-10 Online:2016-04-15 Published:2016-04-05
Contact: ZHANG Jian
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Abstract

Abstract: The open-face shield tunneling the sand stratum can affect the surrounding soil and may cause collapse with excessive deformation. Based on the open-face shield construction of NO.2 Beijing’s Metro of Line 6， the structure and the comprehensive excavation system of the domestic first open-face shield was explained. The law of disturbance was analyzed by monitoring subsidence and horizontal displacements of the soil. Some measures to reduce soil disturbance were also presented. Results showed that the deformation law of the soil is the most complicated when the shield approaches to the monitoring holes. It is important to have a good control on the soil deformation when the shield is passing through and leaving monitoring holes. The range of the disturbance area can be 1.5 times the hole diameter from the shield. The conclusion can be used as a reference for controlling the deformation induced by shield construction in sandy stratum.

Key words: open-face shield, sandy stratum, excavation system, soil disturbance, deformation characteristics

CLC Number:

ZHANG Jian， WANG Shu-ying， YANG Jun-sheng， ZHANG Xi-bao. Soil Disturbance of Beijing Subway Constructed by Open-Face Shield Tunneling Method in Sandy Stratum[J]. Journal of Northeastern University Natural Science, 2016, 37(4): 572-577.

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Soil Disturbance of Beijing Subway Constructed by Open-Face Shield Tunneling Method in Sandy Stratum

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