發(fā)布時(shí)間：2018-07-26 06:19

【摘要】：隨著國(guó)家經(jīng)濟(jì)建設(shè)的蓬勃發(fā)展,發(fā)達(dá)城市的城市地下軌道交通建設(shè)正日新月異。然而地鐵隧道的建設(shè)存在危險(xiǎn)性,因而建立有效的安全風(fēng)險(xiǎn)管控體系迫在眉睫。本文列舉了城市地下軌道交通建設(shè)中所面臨的具體風(fēng)險(xiǎn)及為了減少風(fēng)險(xiǎn)可以采取的措施,另外還詳盡探討了地下隧道施工中的可采用的各種施工方法,并對(duì)其比較選出適應(yīng)于城市地下軌道交通建設(shè)的施工方法-盾構(gòu)施工法。首先探討了在盾構(gòu)施工法中盾構(gòu)機(jī)的選擇,根據(jù)北京地區(qū)的地質(zhì)條件及不同巖土體的物理和力學(xué)特性,闡述了三種不同類型盾構(gòu)機(jī)在北京地層下的施工適應(yīng)性問題,重點(diǎn)對(duì)土壓平衡盾構(gòu)機(jī)在此地質(zhì)條件下的施工適應(yīng)性進(jìn)行了論證。根據(jù)北京地鐵4號(hào)線14標(biāo)段的工程地質(zhì)條件選擇了具體的機(jī)型-日本石川島播磨株式會(huì)社制造的?14.6加泥式土壓平衡盾構(gòu)機(jī)。隨后以日本石川島播磨株式會(huì)社制造的?14.6加泥式土壓平衡式盾構(gòu)機(jī)為研究對(duì)象,做了如下工作:首先,完成刀盤結(jié)構(gòu)設(shè)計(jì),運(yùn)用刀盤開口率相關(guān)知識(shí),依據(jù)刀盤開口率設(shè)計(jì)原則,刀盤開口率與刀盤選型和掘進(jìn)參數(shù)的關(guān)系及相關(guān)設(shè)計(jì)理論,確定了本標(biāo)段地鐵建設(shè)中適用的刀盤開口率范圍。其次完成了刀盤上刀具的選擇,刀具數(shù)量計(jì)算,刀具布置方式等工作。然后將盾構(gòu)推力與刀盤扭矩計(jì)算模型應(yīng)用于北京地鐵4號(hào)線14標(biāo)段雙榆樹至動(dòng)物園區(qū)間盾構(gòu)推力和刀盤扭矩計(jì)算,計(jì)算出的推力扭矩值為機(jī)臺(tái)載荷校驗(yàn)和進(jìn)一步的刀盤有限元分析提供載荷條件。最后使用三維建模軟件Pro/E 4.0野火版對(duì)刀盤系統(tǒng)的各個(gè)零部件進(jìn)行了數(shù)字化建模與裝配,利用有限元軟件ANSYS 12.1對(duì)刀盤系統(tǒng)進(jìn)行結(jié)構(gòu)靜力學(xué)分析,分析三種典型工況下刀盤的應(yīng)力狀況,各部分的變形情況,找出結(jié)構(gòu)中受力和變形薄弱點(diǎn),對(duì)其進(jìn)行強(qiáng)度,剛度校核,進(jìn)行了刀盤的模態(tài)分析,驗(yàn)證了結(jié)構(gòu)動(dòng)力學(xué)特性。通過對(duì)盾構(gòu)機(jī)刀盤設(shè)計(jì)技術(shù)的研究和應(yīng)用,驗(yàn)證了上述研究成果的正確性,依此技術(shù)和理論設(shè)計(jì)出了北京地鐵4號(hào)線所使用的加泥式土壓平衡盾構(gòu)機(jī)刀盤,相關(guān)的研究將推動(dòng)土壓平衡盾構(gòu)機(jī)刀盤國(guó)產(chǎn)化和產(chǎn)業(yè)化的發(fā)展。
[Abstract]:With the vigorous development of national economic construction, urban underground rail transit construction in developed cities is changing with each passing day. However, the construction of subway tunnel is dangerous, so it is urgent to establish an effective safety risk management system. This paper enumerates the specific risks faced in the construction of urban underground rail transit and the measures that can be taken in order to reduce the risks. In addition, it also discusses in detail the various construction methods that can be used in the construction of underground tunnels. The shield construction method, which is suitable for the construction of urban underground rail transit, is selected. Firstly, the selection of shield machine in shield construction method is discussed. According to the geological conditions in Beijing area and the physical and mechanical characteristics of different rock and soil mass, the construction adaptability of three different types of shield machines under Beijing stratum is expounded. The construction adaptability of earth pressure balance shield machine under this geological condition is demonstrated. According to the engineering geological conditions of No. 14 section of Beijing Metro Line No. 4, the specific model of the shield machine, which is made by Ishikawa Island Broadcasting and Grinding Co., Ltd., is selected, which is made by Shikawa Island Broadcasting and Grinding Co., Ltd. Then, taking the shield machine made by Shikawa Island sowing Mill Co., Ltd., as the research object, the following work has been done: firstly, the structure design of the cutter head is completed, and the relevant knowledge of the cutting head opening rate is used. According to the design principle of cutter head opening rate, the relationship between cutter head opening rate and cutter head selection and tunneling parameters, and the relevant design theory, the applicable range of cutter head opening rate in subway construction of this section is determined. Secondly, the selection of cutters on the cutter head, the calculation of the number of cutters and the layout of the cutters are completed. Then, the calculation model of shield thrust and cutter head torque is applied to the calculation of shield thrust and cutter head torque between Shuangyu and Zoo in the 14th section of Beijing Metro Line 4. The calculated thrust torque provides the load condition for the load check and the further finite element analysis of the cutter head. Finally, the 3D modeling software Pro/E 4.0 was used to model and assemble the components of the cutter disk system, and the finite element software ANSYS 12.1 was used to analyze the structural statics of the cutter disk system. This paper analyzes the stress condition of the cutter head under three typical working conditions, the deformation of each part, finds out the weakness of force and deformation in the structure, verifies the strength and stiffness of the cutter head, and carries out the modal analysis of the cutter head, which verifies the dynamic characteristics of the structure. Through the research and application of the cutter head design technology of shield machine, the correctness of the above research results is verified. According to this technology and theory, the cutter head of the earth pressure balance shield machine with mud type used in Beijing Metro Line 4 is designed. The related research will promote the development of localization and industrialization of the cutlery of earth pressure balance shield machine.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U455.39

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