本文選題：西安地鐵　切入點：富水　出處：《隧道建設(shè)》2017年01期 　論文類型：期刊論文

【摘要】：為了解決西安地鐵土壓平衡盾構(gòu)在富水密實性砂層中帶壓換刀所面臨的土艙不易保壓、作業(yè)人員進出艙氣壓控制難和艙內(nèi)換刀安全風險高等技術(shù)難題,對帶壓進艙換刀技術(shù)開展了研究,通過工程實踐總結(jié)出如下操作要點:1)通過工作壓力計算,采取掌子面封閉、保壓試驗等技術(shù)措施使土艙壓力趨于穩(wěn)定,保證土艙壓力滿足要求;2)人員進艙后以10 kPa/min速率進行加壓,人員出艙前以10 kPa/min速率分4個階段逐漸減壓;3)艙內(nèi)換刀應制定周密的施工計劃,刀盤分3次轉(zhuǎn)動完成刀具更換。結(jié)果表明,通過以上控制技術(shù),可以滿足西安地鐵富水密實性砂層盾構(gòu)帶壓換刀施工要求。
[Abstract]:In order to solve the technical problems of earth pressure balance shield machine in Xi'an subway, which is difficult to keep pressure in soil tank, difficult to control air pressure in the cabin and high safety risk of tool changing in the cabin, the pressure change tool with pressure is difficult to keep in the soil tank in the water-rich dense sand bed, and the safety risk of changing knife in the cabin is high. In this paper, the technology of changing cutter with pressure into cabin is studied, and the following operation points are summarized through engineering practice: 1) through calculation of working pressure, taking technical measures such as sealing of face face, holding pressure test and so on, the pressure of earth tank tends to stabilize, To ensure that the pressure of earth tank meets the requirement of "No.2") after entering the cabin, the personnel shall be pressurized at the rate of 10 kPa/min, and the personnel shall gradually decompress at the rate of 10 kPa/min before leaving the cabin, and gradually decompression in 4 stages (3) the detailed construction plan shall be made for the change of knife in the cabin. The cutter head is rotated three times to complete the tool replacement. The results show that the above control technology can meet the requirements of shield belt pressure change in Xi'an metro.
【作者單位】： 西安市地下鐵道有限責任公司;北京中鐵隧建筑有限公司;
【分類號】：U455.43

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本文編號：1565566