本文關(guān)鍵詞： 復(fù)合地層 土壓平衡盾構(gòu) 影響因素 適應(yīng)性 模糊綜合評(píng)價(jià)　出處：《北京交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：土壓平衡盾構(gòu)具有安全可靠、技術(shù)先進(jìn)等優(yōu)勢,目前已被廣泛應(yīng)用于城市地鐵、越江通道及地下管線等隧道工程施工中。由于我國幅員遼闊,各地的地質(zhì)條件錯(cuò)綜復(fù)雜,盾構(gòu)在不同地層中掘進(jìn)效果差別巨大,因此土壓平衡盾構(gòu)掘進(jìn)的適應(yīng)性評(píng)價(jià)成為亟待解決的問題。本文針對(duì)我國華南地區(qū)廣泛分布的復(fù)合地層,開展了土壓平衡盾構(gòu)的適應(yīng)性研究,研究成果具有重要的理論意義和實(shí)用價(jià)值。 本論文的主要研究內(nèi)容和取得的成果如下： (1)調(diào)研了國內(nèi)外土壓平衡盾構(gòu)應(yīng)用的現(xiàn)狀,提出了目前土壓平衡盾構(gòu)適應(yīng)性研究中存在的問題,對(duì)土壓平衡盾構(gòu)適應(yīng)性的含義和適應(yīng)性評(píng)價(jià)方法進(jìn)行了總結(jié)和分析。結(jié)合土壓平衡盾構(gòu)適應(yīng)性評(píng)價(jià)的特點(diǎn),通過對(duì)各種評(píng)價(jià)方法優(yōu)缺點(diǎn)的比較,提出運(yùn)用模糊綜合評(píng)價(jià)法對(duì)土壓平衡盾構(gòu)適應(yīng)性進(jìn)行評(píng)價(jià)的思路。 (2)通過分析影響土壓平衡盾構(gòu)適應(yīng)性的各種因素,運(yùn)用層次分析法得到各影響因素的權(quán)重,進(jìn)而約簡得到土壓平衡盾構(gòu)適應(yīng)性評(píng)價(jià)指標(biāo)。考慮盾構(gòu)設(shè)計(jì)、盾構(gòu)施工、地層條件三個(gè)方面建立了包括目標(biāo)層、準(zhǔn)則層和指標(biāo)層的土壓平衡盾構(gòu)適應(yīng)性評(píng)價(jià)指標(biāo)體系。其中,目標(biāo)層為土壓平衡盾構(gòu)適應(yīng)度D。準(zhǔn)則層由盾構(gòu)設(shè)計(jì)P1、盾構(gòu)施工P2、地層條件P3構(gòu)成。指標(biāo)層中盾構(gòu)設(shè)計(jì)指標(biāo)包括總推力設(shè)計(jì)u1、刀盤扭矩u2、開口率設(shè)計(jì)u3、螺旋輸送機(jī)出渣量設(shè)計(jì)u4、刀具間距設(shè)計(jì)u5;盾構(gòu)施工指標(biāo)包括土倉壓力u6、注漿壓力u7、盾尾間隙u8；地層條件指標(biāo)包括軟硬不均復(fù)合地層u9、球狀風(fēng)化孤石u10。 (3)為了解決不同評(píng)價(jià)指標(biāo)的公度性問題,基于模糊數(shù)學(xué)方法并考慮各指標(biāo)的屬性構(gòu)建了全部評(píng)價(jià)指標(biāo)隸屬函數(shù)。通過工程反饋和咨詢專家意見,并結(jié)合層次分析法和模糊綜合評(píng)價(jià)法構(gòu)建了土壓平衡盾構(gòu)適應(yīng)性評(píng)價(jià)模型,提出了復(fù)合地層土壓平衡盾構(gòu)適應(yīng)性評(píng)價(jià)方法。 (4)以深圳地鐵11號(hào)線車公廟-紅樹灣和南山-前海灣盾構(gòu)區(qū)間為依托,采用所提出的方法對(duì)我國首臺(tái)自行設(shè)計(jì)的Φ7m復(fù)合式土壓平衡盾構(gòu)適應(yīng)性進(jìn)行了評(píng)價(jià),評(píng)價(jià)結(jié)果表明該盾構(gòu)機(jī)在這兩個(gè)區(qū)間的適應(yīng)度為“適應(yīng)”。目前,該兩區(qū)間均已順利貫通,現(xiàn)場盾構(gòu)施工情況表明,該盾構(gòu)機(jī)的選型和設(shè)計(jì)是合理的,這也證明本文所提出的適應(yīng)性評(píng)價(jià)方法有效。
[Abstract]:The earth pressure balance shield has the advantages of safety and reliability, advanced technology and so on. At present, it has been widely used in the construction of tunnels such as city subway, river crossing passage and underground pipeline. Because of the vast territory of our country, the geological conditions in various places are complicated. The tunneling effect of shield tunneling varies greatly in different strata, so the adaptability evaluation of earth pressure balance shield tunneling becomes an urgent problem to be solved. The research on the adaptability of earth pressure balance shield machine is carried out, and the research results have important theoretical significance and practical value. The main contents and achievements of this thesis are as follows:. 1) the present situation of the application of earth pressure balance shield at home and abroad is investigated, and the problems existing in the research on the adaptability of earth pressure balance shield are put forward. This paper summarizes and analyzes the meaning and evaluation method of the adaptability of earth pressure balance shield machine. According to the characteristics of the earth pressure balance shield machine adaptability evaluation, the advantages and disadvantages of various evaluation methods are compared. The fuzzy comprehensive evaluation method is used to evaluate the adaptability of earth pressure balance shield machine. 2) by analyzing the factors that affect the adaptability of earth pressure balance shield, the weight of each factor is obtained by AHP, and then the evaluation index of earth pressure balance shield construction is obtained. The evaluation index system of earth pressure balance shield machine adaptability including target layer, criterion layer and index layer is established in three aspects of stratigraphic conditions. The target layer is the earth pressure balance shield fitness D. the criterion layer is composed of shield design P1, shield construction P2and formation condition P3. The shield design indexes in the index layer include total thrust design U1, cutter head torque U2, opening rate design U3, screw conveyor design U3. The parameters of shield construction include soil chamber pressure u 6, grouting pressure u 7, shield tail clearance u 8, formation conditions including soft and hard uneven composite strata u 9 and spherical weathered solitary stone u 10. In order to solve the problem of the acceptability of different evaluation indexes, the membership function of all evaluation indexes is constructed based on fuzzy mathematics method and considering the attributes of each index. Combined with analytic hierarchy process (AHP) and fuzzy comprehensive evaluation method, an evaluation model of soil pressure balance shield machine adaptability is established, and an evaluation method of soil pressure balance shield machine adaptability is put forward. The adaptability of the first 桅 7m composite earth pressure balance shield machine designed by ourselves in our country is evaluated by using the proposed method based on the Che Gong Miao Hongshu Bay and Nanshan-Feiwan shield section of Shenzhen Metro Line 11, and the proposed method is used to evaluate the adaptability of the 桅 7m composite earth pressure balance shield machine. The evaluation results show that the fitness of the shield machine in these two sections is "adaptive". At present, the two sections have been successfully completed, and the field construction situation of shield machine shows that the selection and design of the shield machine is reasonable. It also proves that the adaptive evaluation method proposed in this paper is effective.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U455.43

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