CAJ | 학술논문

以武汉4、6号线某区间在建地铁为背景，为了研究地铁隧道施工在不同地层损失率、不同施工顺序下对地表沉降和邻近建筑物桩基变形的影响，运用peck公式和FLAC2 D数值模拟方法，结果表明：地层损失率为1．5％和2．0％时，地表沉降和桩身竖向位移值不满足安全要求，应控制地层损失率在1．0％以内；不同地层损失率和施工顺序对桩身水平位移影响较小；先施工6号线后施工4号线引起的桩身位移较小，建议采用此施工顺序．
이무한4、6호선모구간재건지철위배경，위료연구지철수도시공재불동지층손실솔、불동시공순서하대지표침강화린근건축물장기변형적영향，운용peck공식화FLAC2 D수치모의방법，결과표명：지층손실솔위1．5％화2．0％시，지표침강화장신수향위이치불만족안전요구，응공제지층손실솔재1．0％이내；불동지층손실솔화시공순서대장신수평위이영향교소；선시공6호선후시공4호선인기적장신위이교소，건의채용차시공순서．
Based on the under -construction Metro Line 4 and 6 of Wuhan , two-dimensional numerical model was established using peck theory and FLAC to study the deformation of surface and adjusted structure piles caused by subway tunnel construction with different loss rates of stratum and excavation sequences .The re-sults show that when the loss rate of stratum was 1 .5%and 2%, the deformations of surface and piles vertical displacement value can not meet the safety requirements , so that the loss rate of stratum should be within 1 .0%;Different loss rates of stratum and construction sequence have little effect on the horizontal displacement of the piles;Displacement of the pile is smaller to construction line 6, line 4 after, suggestion for this construction se-quence .