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富水砂層地鐵區間隧道盾構掘進參數分析

Analysis of Driving Parameters of Shield Tunnel on Metro Section in Water-Bearing Sand Layer

  • 摘要: 依托哈爾濱軌道交通2號線一期工程耿家站至龍川路站區間的施工情況,對富水砂層盾構隧道開挖過程中的相關掘進參數進行分析。結果表明,盾構機主推力控製範圍為10~18 MN,刀盤轉速約為1.3 r/min,刀盤扭矩為2~4 MN·m。掘進速度保持在40~70 mm/min範圍內,此時土壓力主要為0.1~0.2 MPa,平均出土量約為43 m3。采用太沙基理論對土壓力進行計算,計算值驗證了土壓力監測結果的準確性。

     

    Abstract: Based on the construction of sectional tunnel from Genjia station to Longchuan Road station in the first phase of Harbin Rail Transit Line 2, relevant driving parameters were analyzed during the excavation of the shield tunnel in water-rich sandy stratum. The results showed that the main thrust of shield machine was controlled between 10-18 MN, the speed of cutter was about 1.3 r/min and the torque of cutter head is between 2-4 MN·m. The driving speed was kept within the range of 40-70 mm/min, while the earth pressure was mainly 0.1-0.2 MPa, and the average excavated volume was about 43 m3. Terzaghi Theory was used to calculate the earth pressure, by which the accuracy of the earth pressure monitoring results was verified accordingly.

     

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