Study on Rapidhardening Highperformance Simultaneous  Grouting Material for Shieldbored Tunnels

doi:10.3973/j.issn.1672-741X.2014.02.001

Tunnel Construction ›› 2014, Vol. 34 ›› Issue (2): 95-100.DOI: 10.3973/j.issn.1672-741X.2014.02.001

Study on Rapidhardening Highperformance Simultaneous  Grouting Material for Shieldbored Tunnels

XU Jianping¹, LIN Wenshu¹, XU Ke¹, LIN Jianping², WANG Biao³, MIAO Qiang³, Ding Qingjun^3

(1. Wuhan Metro Group Co., Ltd., Wuhan 430030, Hubei, China; 2. China Railway First Group Co., Ltd., Xi’an 710054, Shaanxi, China; 3.Wuhan University of Technology, Wuhan 430070, Hubei, China)

Received:2013-07-19 Revised:2013-12-20 Online:2014-02-10 Published:2014-02-27

Abstract

Abstract: performance simultaneous grouting material with properties including rapid hardening, antwaterdispersion and good stability is needed in order to meet the requirements of the simultaneous grouting in shield tunneling under large water flow conditions, high water pressure conditions and high water flushing conditions. Rapidhardening highperformance simultaneous grouting material with 210 mm initial fluidity, 0.14% water bleeding rate, 9.6 pH value, and 2.5 MPa 1day compressive strength is obtained, with 42.5 rapid hardening sulphoaluminate cement (R. SAC42.5), fly ash(FA), slag(SL) and sand used as the main matrix materials, and waterreducing admixture(PC)bentonite(BE)triethanolamine accelerator(TEA) used as the water retaining, stable, and early strength additive components. The optimum mix of the rapidhardening highperformance simultaneous grouting material is that: R.SAC42.5∶FA∶SL∶BE∶sand∶water∶PC∶TEA=1∶3∶1∶0.5∶10∶2.25∶0.03∶0.08%. 

Key words: shieldbored tunnel, simultaneous grouting, rapid hardening sulphoaluminate cement, bentonite, rapid hardening agent

XU Jianping, LIN Wenshu, XU Ke, LIN Jianping, WANG Biao, MIAO Qiang, Ding Qingjun. Study on Rapidhardening Highperformance Simultaneous  Grouting Material for Shieldbored Tunnels[J]. Tunnel Construction, 2014, 34(2): 95-100.

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Study on Rapidhardening Highperformance Simultaneous  Grouting Material for Shieldbored Tunnels

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