Prediction of Ground Deformation Induced by Curved Pipe Jacking

doi:10.3973/j.issn.1672-741X.2017.09.009

Tunnel Construction ›› 2017, Vol. 37 ›› Issue (9): 1120-1125.DOI: 10.3973/j.issn.1672-741X.2017.09.009

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Prediction of Ground Deformation Induced by Curved Pipe Jacking

ZHANG Peng¹, LI Zhihong², ZENG Cong¹, MA Baosong¹

（1. Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, Hubei, China; 2. Guangdong Nanyue Transportation Investment & Construction Co., Ltd., Guangzhou 510101, Guangdong, China)

Received:2017-01-17 Revised:2017-04-26 Online:2017-09-20 Published:2017-09-28

Abstract

Abstract:

The field deformation data monitored in curved pipe jacking of Gongbei Tunnel are analyzed; and the deviation curve of the ground settlement groove is obtained. And then ground settlement prediction formulas of Peck and Loganathan modified by deviation of ground settlement groove are obtained based on existing Peck and Loganathant formulas considering influence of relative position of curved pipe jacking and tunnel on deviation of ground settlement groove. The results show that: 1）The pipe jacking induced ground settlement groove curve shows asymmetry; and the maximum settlement point would occur to inside/outside of the curve. 2）The deviation of ground settlement groove mainly lies on soil loss induced by relative position of curved pipe jacking and tunnel; and the relative position of curved pipe jacking and tunnel can be affected by ground properties, jacking force, grouting pressure and curvature radius. 3） The modified Peck formula can well reflect the deviation of ground settlement groove and maximum settlement during pipe jacking in sandy stratum and silt soil stratum.

Key words: curved pipe jacking, ground deformation, deformation prediction, soil loss, deviation of ground settlement groove

CLC Number:

U 455.4

ZHANG Peng, LI Zhihong, ZENG Cong, MA Baosong. Prediction of Ground Deformation Induced by Curved Pipe Jacking[J]. Tunnel Construction, 2017, 37(9): 1120-1125.

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Prediction of Ground Deformation Induced by Curved Pipe Jacking

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