本文關(guān)鍵詞： 地鐵隧道 軟土地區(qū) 隧道橫向剛度 管片縱縫接頭 管片厚度 連接螺栓 防水密封墊　出處：《中國鐵道科學(xué)》2017年05期 　論文類型：期刊論文

【摘要】：針對(duì)軟土地區(qū)地鐵盾構(gòu)隧道管片縱縫接頭因地表超載易發(fā)生破損的問題,考慮軟土地層的特性,提出在軟土地區(qū)盾構(gòu)隧道橫向剛度設(shè)計(jì)中,采用加大隧道結(jié)構(gòu)剛度和強(qiáng)度的"剛性襯砌"設(shè)計(jì)理念,對(duì)管片縱縫接頭進(jìn)行優(yōu)化。通過局部或者整體增加管片的厚度,均可增加管片縱縫接頭的抗彎剛度,從而明顯減小管片環(huán)的變形,雖然由此使得管片環(huán)的彎矩有所增大,但管片環(huán)變形減小的幅度遠(yuǎn)大于其彎矩增大的幅度;分別設(shè)計(jì)外張縱縫接頭與內(nèi)張縱縫接頭連接螺栓的位置,縱縫接頭的連接螺栓應(yīng)靠近接頭張開的一側(cè);在管片環(huán)分塊時(shí)盡量將管片縱縫接頭設(shè)計(jì)在彎矩較小的位置,同時(shí)在滿足施工的條件下,盡量減少管片環(huán)的分塊數(shù)量;局部加強(qiáng)縱縫接頭位置的管片棱角,以預(yù)防管片接頭棱角破損;通過合理設(shè)計(jì)防水密封墊的位置及斷面形式,加強(qiáng)盾構(gòu)隧道管片縱縫接頭的防水能力。
[Abstract]:Considering the characteristics of soft soil, considering the characteristics of soft soil layer, the longitudinal joint joint of shield tunnel in soft soil area is easy to be damaged because of overloading on the ground, and the transverse stiffness design of shield tunnel in soft soil area is put forward. By adopting the design idea of "rigid lining" to increase the stiffness and strength of tunnel structure, the longitudinal joint of segment can be optimized. The bending stiffness of longitudinal joint of segment can be increased by increasing the thickness of segment locally or as a whole. Thus, the deformation of segment ring is obviously reduced, although the bending moment of segment ring is increased, but the amplitude of segment ring deformation decrease is much larger than that of the increase of segment ring bending moment. The position of the connecting bolt between the external longitudinal joint and the inner longitudinal joint is designed separately. The connecting bolt of the longitudinal joint should be close to the side of the joint opening, and the longitudinal joint of the segment should be designed in the position where the bending moment is small when the segment ring is divided. At the same time, under the condition of satisfying the construction conditions, the number of segment rings should be reduced as far as possible; the edge angle of segments in the position of longitudinal joint should be strengthened in order to prevent the breakage of the corner of segment joints; the position and section form of waterproof seal gasket can be reasonably designed. Strengthen the waterproof capacity of longitudinal joint of shield tunnel segment.
【作者單位】： 華東交通大學(xué)鐵路環(huán)境振動(dòng)與噪聲教育部工程研究中心;同濟(jì)大學(xué)道路與交通工程教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51608200,51478353,51368020,51468021) 江西省杰出青年人才資助計(jì)劃項(xiàng)目(20162BCB23048)
【分類號(hào)】：U231.3;U455.43
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本文編號(hào)：1554149