Study on Freezing Effect and Operation of Profiled  Enhancing Freezingtube in Freezesealing Pipe Roof

doi:10.3973/j.issn.1672-741X.2015.11.009

Tunnel Construction ›› 2015, Vol. 35 ›› Issue (11): 1169-1175.DOI: 10.3973/j.issn.1672-741X.2015.11.009

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Study on Freezing Effect and Operation of Profiled  Enhancing Freezingtube in Freezesealing Pipe Roof

REN Hui¹, HU Xiangdong², CHEN Jin², ZHANG Jun³

(1. Management Center of Zhuhai Link Road of Hong KongZhuhaiMacao Bridge, Zhuhai 519030, Guangdong,  China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;  3. CCCC Second Highway Consultants Co., Ltd., Wuhan 430056, Hubei, China)

Received:2015-05-20 Revised:2015-10-20 Online:2015-11-20 Published:2015-11-25

Abstract

Abstract:

Gongbei tunnel on Zhuhai Link of Hong KongZhuhaiMacau Bridge is to be constructed by “Freezesealing Pipe Roof” (FSPR) method. FSPR, serving as a forepoling system, consists of three types of freezing pipes with special functions. Profiled enhancing freezingtube is aimed at minimizing the influence of the excavation disturbance and lining placement on the frozen soil. Based on the model experiment of FSPR, the effect of profiled enhancing freezingtube is presented. Conclusions drawn are as follows: 1) Using profiled enhancing freezingtube can weaken the thermal disturbance arising from the excavation and lining placement; 2) The safety of the excavation is improved because of the better frozen soil achieved by opening the profiled enhancing freezingtube in advance.

Key words: Hong KongZhuhaiMacau Bridge, Gongbei tunnel, freezesealing pipe roof, profiled enhancing freezingtube, model test

CLC Number:

U 45

REN Hui, HU Xiangdong, CHEN Jin, ZHANG Jun. Study on Freezing Effect and Operation of Profiled  Enhancing Freezingtube in Freezesealing Pipe Roof[J]. Tunnel Construction, 2015, 35(11): 1169-1175.

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Study on Freezing Effect and Operation of Profiled  Enhancing Freezingtube in Freezesealing Pipe Roof

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