本文選題：砂-粘土復(fù)合地層　切入點(diǎn)：盾構(gòu)隧道　出處：《現(xiàn)代隧道技術(shù)》2017年05期

【摘要】：文章依托深圳地鐵11號(hào)線寶—碧區(qū)間盾構(gòu)隧道工程,基于現(xiàn)場(chǎng)實(shí)測(cè)地表沉降數(shù)據(jù)和數(shù)值模擬分析,探究砂-粘土復(fù)合地層盾構(gòu)隧道施工引起的地表沉降規(guī)律。采用高斯峰值函數(shù)對(duì)隧道橫斷面沉降數(shù)據(jù)進(jìn)行擬合,得到沉降槽寬度系數(shù)、最大沉降量和地層損失率等表征橫斷面沉降特征的重要參數(shù)。與軟土地層和砂卵石地層沉降槽寬度系數(shù)比較,砂-粘土復(fù)合地層沉降槽寬度系數(shù)小于軟土地層且大于砂卵石地層。采用數(shù)值模擬計(jì)算結(jié)合實(shí)測(cè)數(shù)據(jù)的方法,研究了在砂-粘土復(fù)合地層中隧道埋深、上覆地層條件和隧道洞身處地層條件對(duì)地表沉降的影響。研究結(jié)果表明,地表沉降受上覆地層條件影響顯著,與接近地表地層性質(zhì)密切相關(guān)。
[Abstract]:Relying on the shield tunneling project of Bao-Bi section of Shenzhen Metro Line 11, based on the field measured ground subsidence data and numerical simulation analysis, this paper explores the ground subsidence law caused by the construction of shield tunnel in sand and clay composite strata.Gao Si peak value function is used to fit the settlement data of tunnel cross section, and the important parameters such as width coefficient, maximum settlement and loss rate of stratum are obtained.Compared with the coefficient of sedimentation trough width in soft soil layer and sand pebble formation, the width coefficient of sedimentation trough in sand clay composite formation is smaller than that in soft soil formation and is larger than that in sand pebble formation.In this paper, the influence of tunnel depth, overlying formation conditions and tunnel hole formation conditions on surface subsidence in sandy clay composite strata is studied by means of numerical simulation calculation combined with measured data.The results show that the surface subsidence is significantly affected by the overlying stratigraphic conditions and is closely related to the properties of the near-surface strata.
【作者單位】： 上海市基礎(chǔ)工程集團(tuán)有限公司;
【分類號(hào)】：P642.26;U455.43

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1 王新海;李元斌;秦世勇;;壓敏復(fù)合地層調(diào)查半徑研究[J];石油天然氣學(xué)報(bào);2010年05期

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本文編號(hào)：1714471