Foundation Treatment Technology of WaterRich
SoftRock Tunnel of SingleTrack Railway

SHANG Jun, ZHAO Wei, HE Wei

doi:10.3973/j.issn.2096-4498.2021.S1.054

Tunnel Construction >

2021 , Vol. 41 >Issue S1: 414

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.S1.054

Foundation Treatment Technology of WaterRich SoftRock Tunnel of SingleTrack Railway

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(1. The 2nd Engineering Co., Ltd. of China Railway Tunnel Group, Sanhe 065201, Hebei, China; 2. Guangdong Provincial Key Laboratory of Intelligent Monitoring and Maintenance of Tunnel Structure, Guangzhou 511455, Guangdong, China)

Online published: 2021-08-30

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Abstract

The Zhongtiaoshan tunnel crosses rich and highpressure water Tertiary formation for a long distance. To guarantee the structural stability and operation safety, a treatment scheme of gravel filling + grouting reinforcement is put forward to solve the argillization of foundation, which improves the bearing capacity of soft foundation of heavyhaul railway tunnel effectively. Then a drainage and pressurerelief technology for invert bottom is developed, the drainage ducts are laid on surface of primary support of invert to conduct dewatering, thus reducing the structural damage risk of tunnel foundation during operation caused by dynamic groundwater pressure.

Key words： tunnel; highpressure groundwater; Tertiary formation; gravel filling; grouting reinforcement; foundation drainage

Cite this article

SHANG Jun, ZHAO Wei, HE Wei . Foundation Treatment Technology of WaterRich SoftRock Tunnel of SingleTrack Railway[J]. Tunnel Construction, 2021 , 41(S1) : 414 . DOI: 10.3973/j.issn.2096-4498.2021.S1.054

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