本文選題：盾構(gòu)隧道 + 曲線開挖��； 參考：《中國公路學(xué)報》2017年08期

【摘要】：為提高盾構(gòu)機(jī)開挖急曲線隧道的能力,應(yīng)準(zhǔn)確預(yù)估超挖刀的伸出長度與范圍、鉸接角等幾何作業(yè)參數(shù)。目前上述參數(shù)僅基于盾構(gòu)與隧道設(shè)計軸線的平面幾何關(guān)系確定,無法適應(yīng)三維復(fù)合曲線隧道的施工要求�；诳臻g向量分析理論,提出三維復(fù)合曲線隧道超挖刀長度與范圍、鉸接角的理論算法,并基于Fortran語言實現(xiàn)算法的求解。對實際隧道工程盾構(gòu)的幾何作業(yè)參數(shù)進(jìn)行了模擬,通過模擬值與實測數(shù)據(jù)的對比,驗證了理論算法的有效性。結(jié)果表明:鉸接角的實測值與模擬值整體擬合較好,當(dāng)盾構(gòu)機(jī)在曲線段掘進(jìn)時,鉸接角的實測值略大于模擬值,是由于實際施工中以刀盤的中心點(diǎn)擬合隧道設(shè)計軸線為糾偏目標(biāo),與理論算法中以管片拼裝中心點(diǎn)擬合隧道軸線的理想掘進(jìn)狀態(tài)存在差異;模擬的超挖刀范圍窄于實測范圍,而超挖刀伸出長度的模擬值比實測值略大,存在的微小差異來自于理論算法假定盾構(gòu)機(jī)不擠壓地層且周圍地層不變形,而實際施工中地層存在一定的變形量。
[Abstract]:In order to improve the ability of shield machine to excavate sharp curve tunnel, it is necessary to accurately predict the geometric operation parameters such as the length and range of overdigging knife, hinge angle and so on. At present, the above parameters are only determined on the basis of the plane geometry relation between shield tunneling and tunnel design axis, and can not meet the construction requirements of 3D composite curve tunnel. Based on the theory of space vector analysis, this paper presents a theoretical algorithm for the length, range and hinge angle of three dimensional composite curve tunnel overcut cutter. The algorithm is solved based on Fortran language. The geometric operating parameters of shield tunneling in actual tunnel engineering are simulated. The validity of the theoretical algorithm is verified by comparing the simulated data with the measured data. The results show that the measured value of hinge angle fits well with the simulated value as a whole, and the measured value of hinge angle is slightly larger than the simulated value when the shield machine is driving in the curve section. It is due to the fact that the center point of the cutter head fitting the design axis of the tunnel is taken as the rectifying target in the actual construction, which is different from the ideal tunneling state of fitting the tunnel axis with the central point of the segment assembly in the theoretical algorithm, and the range of the simulated over-digging knife is narrower than the measured range. However, the simulation value of the outstretched length of the overdug knife is slightly larger than the measured value, and the slight difference lies in the assumption that the shield machine does not squeeze the stratum and the surrounding stratum does not deform, but there is a certain amount of deformation in the actual construction.
【作者單位】： 哈爾濱工業(yè)大學(xué)結(jié)構(gòu)工程災(zāi)變與控制教育部重點(diǎn)實驗室;哈爾濱工業(yè)大學(xué)土木工程智能防災(zāi)減災(zāi)工業(yè)和信息化部重點(diǎn)實驗室;
【基金】：國家自然科學(xué)基金項目(51478146) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計劃(“九七三”計劃)項目(2015CB057800)
【分類號】：U455.43
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本文編號：1850471