【摘要】：在淺埋暗挖地鐵車站設(shè)計(jì)和施工過(guò)程中,如何經(jīng)過(guò)合理的技術(shù)、經(jīng)濟(jì)、環(huán)境比較后最終確定合理的車站結(jié)構(gòu)型式和施工方法顯得尤為重要。針對(duì)地鐵車站結(jié)構(gòu)型式多樣化和復(fù)雜的周邊環(huán)境對(duì)暗挖車站的施工方法提出更高要求的現(xiàn)狀,綜合采用統(tǒng)計(jì)分析、試驗(yàn)優(yōu)化設(shè)計(jì)、數(shù)值模擬、現(xiàn)場(chǎng)監(jiān)測(cè)等多種研究手段進(jìn)行了系統(tǒng)的研究,主要開(kāi)展了以下幾方面工作:(1)建立了淺埋暗挖地鐵車站結(jié)構(gòu)型式和施工方法優(yōu)化體系。從系統(tǒng)論的觀點(diǎn)出發(fā),提出了淺埋暗挖地鐵車站結(jié)構(gòu)型式和施工方法的優(yōu)化思想和優(yōu)化原則,建立了淺埋暗挖地鐵車站優(yōu)化體系的構(gòu)架,并將地鐵車站的優(yōu)化設(shè)計(jì)按其階段不同劃分為五個(gè)層次:結(jié)構(gòu)選型的概念優(yōu)化、結(jié)構(gòu)斷面型式的單指標(biāo)試驗(yàn)設(shè)計(jì)、結(jié)構(gòu)斷面型式的多指標(biāo)試驗(yàn)設(shè)計(jì)、施工方法的綜合比選、施工過(guò)程控制。(2)提出了淺埋暗挖地鐵車站結(jié)構(gòu)選型的概念優(yōu)化方法。在總結(jié)淺埋暗挖地鐵車站各類結(jié)構(gòu)型式的各自特點(diǎn)的基礎(chǔ)上,提出了不同地質(zhì)條件下淺埋暗挖地鐵車站結(jié)構(gòu)型式的優(yōu)選原則,并提出當(dāng)?shù)刭|(zhì)條件相近或相同時(shí),在滿足車站使用功能、周邊環(huán)境條件允許的前提下,綜合考慮車站結(jié)構(gòu)的受力性能和防水效果,淺埋暗挖地鐵車站的結(jié)構(gòu)斷面型式應(yīng)盡量遵循"宜單不宜雙,宜近不宜連"的原則。(3)基于單指標(biāo)正交試驗(yàn),研究了不同的地鐵車站結(jié)構(gòu)斷面參數(shù)對(duì)地表沉降、洞周收斂偏差值、圍巖塑性區(qū)面積、應(yīng)力集中等力學(xué)指標(biāo),以及開(kāi)挖斷面面積和襯砌周長(zhǎng)等經(jīng)濟(jì)指標(biāo)的影響規(guī)律,探討了地鐵車站結(jié)構(gòu)斷面形狀及洞室布置參數(shù)、本構(gòu)模型參數(shù)、支護(hù)參數(shù)等11項(xiàng)因素對(duì)各項(xiàng)試驗(yàn)指標(biāo)的影響程度,并確定了影響該指標(biāo)的因素主次順序。(4)基于多指標(biāo)正交試驗(yàn),進(jìn)行了地鐵車站結(jié)構(gòu)斷面形狀及洞室布置參數(shù)、本構(gòu)模型參數(shù)、支護(hù)參數(shù)的多指標(biāo)問(wèn)題的求解,獲得了兼顧地表沉降、洞周收斂偏差值、圍巖塑性區(qū)面積、應(yīng)力集中等力學(xué)指標(biāo),以及開(kāi)挖斷面面積和襯砌周長(zhǎng)等經(jīng)濟(jì)指標(biāo)的最優(yōu)試驗(yàn)方案,探索出適用于求解淺埋暗挖地鐵車站結(jié)構(gòu)斷面型式多指標(biāo)優(yōu)化問(wèn)題的最小隸屬度偏差方法和質(zhì)量損失函數(shù)方法。(5)基于大量調(diào)研資料,分析了國(guó)內(nèi)外典型全暗挖和局部暗挖地鐵車站的結(jié)構(gòu)型式、主體結(jié)構(gòu)尺寸、拱頂覆土厚度及暗挖施工方法,并進(jìn)行了歸類總結(jié),在此基礎(chǔ)上,對(duì)各種結(jié)構(gòu)型式暗挖車站常用的施工方法進(jìn)行了經(jīng)濟(jì)技術(shù)比較,據(jù)此提出了適于不同結(jié)構(gòu)型式暗挖車站的施工方法。(6)基于變位分配原理,通過(guò)數(shù)值模擬對(duì)地鐵車站施工產(chǎn)生的地層變形進(jìn)行分階段預(yù)測(cè),制定各階段控制標(biāo)準(zhǔn)的預(yù)警值、報(bào)警值和最終控制值,將地表沉降的控制標(biāo)準(zhǔn)分解到每個(gè)施工階段中,與施工監(jiān)測(cè)相配合對(duì)變形進(jìn)行分步控制,將每一步的變形值控制在控制標(biāo)準(zhǔn)內(nèi).實(shí)現(xiàn)了較為準(zhǔn)確的地表變形過(guò)程控制。
[Abstract]:In the process of design and construction of shallow excavated subway station, it is very important to determine the reasonable structure type and construction method of subway station after reasonable technology, economy and environment comparison. In view of the situation that the subway station structure is diversified and complicated surrounding environment puts forward higher requirements for the construction method of the underground excavation station, the comprehensive use of statistical analysis, experimental optimization design, numerical simulation, Several research methods, such as field monitoring, have been systematically studied, and the following work has been carried out: (1) the structure type and construction method optimization system of shallow underground excavated subway station has been established. From the point of view of system theory, this paper puts forward the optimization thought and principle of the structure type and construction method of shallow underground excavating subway station, and establishes the framework of the optimization system of shallow buried underground excavation subway station. The optimization design of subway station is divided into five levels according to its stage: conceptual optimization of structural selection, single index test design of structural section type, multi-index test design of structural cross-section type, comprehensive comparison and selection of construction methods. Construction process control. (2) Conceptual optimization method for structural selection of shallow underground excavated subway station is proposed. On the basis of summing up the characteristics of various structural types of shallow underground excavated subway station, this paper puts forward the optimum selection principle of shallow buried underground subway station structure type under different geological conditions, and puts forward that when the geological conditions are similar or identical, On the premise of satisfying the station operation function and permitting the surrounding environment, considering comprehensively the stress performance and waterproof effect of the station structure, the structural cross-section type of the shallow buried underground subway station should follow as far as possible "should be single instead of double," (3) based on the single index orthogonal test, the mechanical indexes such as surface subsidence, convergence deviation value, plastic zone area of surrounding rock, stress concentration and so on of different structural cross-section parameters of subway station are studied, such as surface subsidence, convergence deviation value of tunnel circumference, area of surrounding rock plastic zone, stress concentration and so on. The influence law of economic indexes such as excavation cross-section area and lining perimeter is discussed. The influence degree of 11 factors, such as section shape of subway station structure, tunnel layout parameter, constitutive model parameter, support parameter and so on, on each test index is discussed. The main and secondary order of the factors affecting the index is determined. (4) based on the orthogonal test of multiple indexes, the multi-index problems of section shape, tunnel layout parameters, constitutive model parameters and support parameters of subway station structure are solved. The optimal test scheme is obtained, which takes into account the mechanical indexes such as surface subsidence, convergence deviation value around the hole, plastic zone area of surrounding rock, stress concentration and other economic indexes, such as the area of excavation section and the perimeter of lining, etc. The minimum membership deviation method and mass loss function method for multi-index optimization of subsurface excavation subway station structure are explored. (5) based on a large number of investigation data, the minimum membership deviation method and mass loss function method are proposed. This paper analyzes on the structural types, main structure dimensions, thickness of overlying soil and construction methods of underground excavation of typical fully and partially excavated subway stations at home and abroad, and summarizes the methods of construction, on the basis of which, In this paper, the common construction methods of various structural types of underground excavation stations are compared economically and technologically, and the construction methods suitable for different structural types of underground excavation stations are put forward. (6) based on the principle of displacement distribution, Through numerical simulation, the formation deformation caused by subway station construction is predicted in stages, and the early warning value, alarm value and final control value of control standard for each stage are worked out, and the control standard of ground subsidence is decomposed into each construction stage. The deformation is controlled step by step with construction monitoring, and the deformation value of each step is controlled within the control standard. More accurate control of surface deformation process is realized.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：U231.3

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 洪俊杰;北京暗挖地鐵車站變形數(shù)據(jù)統(tǒng)計(jì)分析與施工優(yōu)化[D];北京交通大學(xué);2017年

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本文編號(hào)：2341799