本文選題：土力學(xué)　切入點(diǎn)：地鐵施工　出處：《巖石力學(xué)與工程學(xué)報(bào)》2017年S1期

【摘要】：本文系統(tǒng)綜述5大類(lèi)地鐵施工誘發(fā)地表最大沉降量S_(max)的預(yù)測(cè)公式及其適用性,并以大量的國(guó)內(nèi)地鐵實(shí)測(cè)沉降資料為依據(jù),總結(jié)地鐵在不同覆跨比H/D、不同地層條件和不同施工方法下的S_(max)、沉降槽寬系數(shù)k、地層損失率V_l及間隙參數(shù)g的變化規(guī)律及其經(jīng)驗(yàn)關(guān)系。結(jié)果表明:(1)經(jīng)驗(yàn)法需要?dú)w納大量監(jiān)測(cè)成果來(lái)預(yù)測(cè)S_(max);解析方法多適用于地層條件相對(duì)單一的施工期不排水條件下沉降估算;半經(jīng)驗(yàn)公式存在較大的地區(qū)性差異;(2)S_(max)主要與地鐵所處的一般性地層條件(為了保護(hù)臨近重要建(構(gòu))筑物而采取輔助施工措施來(lái)超前加固地層的特殊情況除外)、覆跨比H/D、施工方法等因素有關(guān),其中S_(max)與H/D呈反相關(guān),不同地層條件下盾構(gòu)法(土壓、泥水)施工所誘發(fā)的S_(max)平均值為-11.5~-31.3 mm,淺埋暗挖法下S_(max)離散性較大,其平均為-13.0~-41.6 mm,表明在控制地表沉降方面盾構(gòu)法較優(yōu)于淺埋暗挖法;(3)不同地層和H/D條件下S_(max)=(-0.28~-0.71)g,S_(max)/g和H/D關(guān)系可采用修正Atkinson公式(α=0.15~0.28)及Clough公式(β=-0.55~-1.11)來(lái)描述。通過(guò)本文系統(tǒng)的總結(jié)分析,可相對(duì)全面地了解城市地鐵施工誘發(fā)S_(max)的預(yù)測(cè)方法及其各自的適用性,為后期類(lèi)似地鐵工程施工誘發(fā)地表沉降的準(zhǔn)確預(yù)測(cè)提供科學(xué)參考。
[Abstract]:In this paper, the prediction formulas and their applicability of the maximum ground subsidence induced by the construction of 5 kinds of subways are systematically summarized, and based on a large number of measured settlement data of domestic subways, This paper sums up the variation law and empirical relationship of the subways under different overburden ratio H / D, different formation conditions and different construction methods, the coefficient of settlement slot width k, the formation loss rate V l and the clearance parameter g. The results show that the empirical method needs to be summed up. A large number of monitoring results are used to predict SIV max.Analytical methods are mostly applicable to the settlement estimation under undrained conditions under relatively single formation conditions. There is a large regional difference between the semi-empirical formula and the general formation conditions of the subway (except for special cases where auxiliary construction measures are taken to protect adjacent important buildings to reinforce the strata ahead of time. Covering span ratio H / D, construction method and other factors, The average value of the shield method (soil pressure, mud water) induced by the construction of the shield method is -11.5 ~ 31.3 mm, and under the method of shallow burying and digging, there is a greater dispersion of Stix _ max.There is a negative correlation between SSP _ max _ D and H _ / D, and the average value of the shield method (earth pressure, mud water) is -11.5 ~ (-31.3) mm. The average value is -13.0 ~ 41.6 mm, which indicates that the shield method is better than the shallow burying tunneling method in controlling the surface subsidence. Under the condition of H / D and H / D, the relationship between Smax-0.28- 0.71g and H / D can be described by the modified Atkinson formula (偽 -0.150.28) and the Clough formula (尾 -0.55 ~ 1.11). The prediction methods and their respective applicability of SSP _ max induced by urban subway construction can be comparatively comprehensively understood, which provides a scientific reference for the accurate prediction of surface subsidence induced by similar subway construction in the later period.
【作者單位】： 西安理工大學(xué)巖土工程研究所;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51678484) 西安理工大學(xué)陜西省黃土力學(xué)與工程重點(diǎn)實(shí)驗(yàn)室科研計(jì)劃項(xiàng)目(16JS073)~~
【分類(lèi)號(hào)】：P642.26;U231.3

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本文編號(hào)：1656896