本文選題：地表沉降 + 淺埋暗挖法　； 參考：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2017年10期

【摘要】：目的:在城市地鐵的建設過程中,地下水滲流對地表沉降存在較大影響。然而,滲透性地層中淺埋暗挖法施工的案例報道較少,地表沉降規(guī)律尚不明晰。本文以深圳地鐵5號線和7號線重疊段工程為例,詳細分析在滲流作用下淺埋暗挖法施工引起的地表沉降特征以及小導管注漿區(qū)和初支襯砌滲透性對地表沉降的影響,并進一步研究超前排水措施在沉降控制方面的作用。創(chuàng)新點:1.系統(tǒng)分析了富水滲透性地層中淺埋暗挖隧道施工引起的地表沉降的發(fā)展過程以及沉降特征;2.驗證了三維流固耦合數(shù)值模型模擬富水環(huán)境下重疊隧道施工過程的可行性;3.研究了小導管注漿區(qū)、初支襯砌的滲透性和超前排水措施對地表沉降的影響。方法:1.結合隧道施工方案和地表沉降監(jiān)測數(shù)據(jù),分析滲流作用下的地表沉降特征(包括沉降影響范圍、沉降槽寬度以及與拱頂沉降的關系等);2.通過三維流固耦合數(shù)值模型,研究小導管注漿區(qū)和初支襯砌滲透性對地表沉降以及地層孔壓變化過程的影響;3.通過模擬掌子面前方水平排水孔,研究超前排水措施對掌子面穩(wěn)定性和地表沉降發(fā)展的影響。結論:1.對于滲透性地層中的淺埋暗挖隧道工程,地下水滲流引起的固結效應是地表沉降量以及沉降范圍大幅增長的主要原因。2.全斷面注漿能夠很好地控制地表沉降,而小導管注漿的效果則十分有限。3.降低小導管注漿區(qū)的滲透性,尤其是初支襯砌的滲透性,可以減少地層孔壓的下降程度,進而降低地表沉降。4.打設超前水平排水孔可以顯著提高掌子面穩(wěn)定性,卻對地表沉降影響有限;當無法進行全斷面注漿時,推薦采取小導管注漿與超前排水相結合的方式施工。
[Abstract]:Objective: in the construction process of urban subway, groundwater seepage has a great influence on the surface subsidence. However, the case of shallow buried excavation method in seepage stratum is less reported and the law of surface subsidence is not clear. This paper, taking Shenzhen Metro Line 5 and 7 line overlap section project as an example, analyzes in detail shallow buried excavation method under seepage action. The characteristics of ground subsidence caused by work and the influence of the permeability of small pipe grouting area and initial lining on the surface subsidence, and further study the effect of the advance drainage measures on settlement control. Innovation point: 1. the development process and settlement characteristics of surface subsidence caused by shallow buried tunnel construction in the water permeable permeability stratum are analyzed. 2. verify the feasibility of the three-dimensional fluid solid coupling numerical model to simulate the construction process of overlapping tunnels in the water rich environment. 3. the influence of the permeability of the initial lining and the advance drainage measures on the surface subsidence is studied. Method: 1. combined with the tunnel construction scheme and the surface subsidence monitoring data, the surface settlement under the seepage flow is analyzed. The characteristics (including the range of settlement, the width of settlement trough and the relationship with the settlement of the vault); 2. through the three-dimensional fluid solid coupling numerical model, the influence of the permeability of the grouting zone and the initial lining on the surface settlement and the change of the pore pressure is studied. 3. through the simulation of the horizontal drainage holes ahead of the front of the palmar surface, the advanced drainage measures are studied. The effect of subsurface stability and surface subsidence development. 1. for shallow buried tunnel in permeable strata, the consolidation effect caused by groundwater seepage is the main reason for the large increase of surface settlement and settlement range,.2. full section grouting can control surface subsidence well, and the effect of small pipe grouting is very good. Reducing the permeability of the small catheter grouting area by limiting.3., especially the permeability of the initial lining, can reduce the decrease of the pore pressure, and then reduce the surface settlement.4. to set the advanced horizontal drainage holes, which can significantly improve the stability of the surface of the palm, but it has a limited influence on the surface subsidence. The slurry is constructed in combination with the advanced drainage.
【作者單位】： Research
【基金】：Project supported by the National Natural Science Foundation of China(No.51508503) the Fund of the China Scholarship Council(No.201406320025) the Research Plan of the Academician Workstation of Guangzhou Chemical Grouting Co.Ltd.,China Academy of Science(No.2016GZZ01)
【分類號】：P642.26;U231;U456.3

【相似文獻】

相關碩士學位論文 前4條

1 李皓;北京地鐵淺埋暗挖法施工引起地表沉降規(guī)律研究[D];中國地質(zhì)大學(北京);2015年

2 張文杰;城市地鐵淺埋暗挖隧道地表沉降影響分析[D];石家莊鐵道大學;2015年

3 王哲;淺埋暗挖法施工對杭州地層變形影響分析[D];浙江工業(yè)大學;2013年

4 鐘濤;淺埋暗挖法地鐵施工對地表及鄰近建筑物影響研究[D];遼寧工程技術大學;2012年

，

本文編號：2019649