CAJ | 학술논문

盾构法隧道施工引起的土体超孔隙水压力消散，会导致工后地表继续沉降。在前人研究基础上，提出了隧道周围土体的初始超孔隙水压力计算方法。采用分层总和法，计算由于扰动区内土体超孔隙水压力消散引起的地表固结沉降量，结合施工阶段地表沉降量，叠加得到总的工后横向地表沉降。提出了固结开始t时刻的地表总沉降量计算方法，研究了地表沉降速率随时间的变化。算例分析结果表明：本文方法计算得到的横向地表沉降曲线符合正态分布规律，与实测值吻合；地表总沉降速率的发展也与实测沉降速率曲线相符。
순구법수도시공인기적토체초공극수압력소산，회도치공후지표계속침강。재전인연구기출상，제출료수도주위토체적초시초공극수압력계산방법。채용분층총화법，계산유우우동구내토체초공극수압력소산인기적지표고결침강량，결합시공계단지표침강량，첩가득도총적공후횡향지표침강。제출료고결개시t시각적지표총침강량계산방법，연구료지표침강속솔수시간적변화。산례분석결과표명：본문방법계산득도적횡향지표침강곡선부합정태분포규률，여실측치문합；지표총침강속솔적발전야여실측침강속솔곡선상부。
Due to the excess pore water pressure dissipation, the post-construction surface settlement will be continued caused by shield tunneling. Based on past research, a calculation method of initial excess pore water pressure around the tunnel is put forward. By using layerwise summation method, the surface consolidation settlement can be got within disturbed region of excess pore water pressure dissipation. Combining with the surface settlement in tunnel construction phase, total transverse post-construction surface settlement is obtained. The total surface settlement after soil consolidation is proposed;and surface settlement rate changes over time are also studied. As is shown in analytical calculation, the calculated results of the transverse surface settlement curves are in good agreement with the field data; and they are also in accordance with the normal distribution law. The development of total surface settlement rate is in good agreement with the field data.