CAJ | 학술논문

深圳地铁7号线盾构区间在YDK14+180~+280段进行近接桩基施工中，为了严格控制施工对近接桩基的扰动，以保证施工的安全性，通过有限元软件分析了不同掘进姿态在盾构施工过程中对近接桩基的影响。指出：1)盾构掘进姿态是施工过程中对近接结构物影响十分显著的因素，施工时应加以严格控制；2)在盾构蛇行推进过程中，随桩基与掌子面距离的减小和盾构蛇行偏角的加大，盾构施工掘进对桩基的影响程度在加大；3)在盾构刀盘推进至距离桩基间距为2.0D时，应严格控制盾构施工过程中的掘进姿态，特别需要控制盾构的左右偏离。
심수지철7호선순구구간재YDK14+180~+280단진행근접장기시공중，위료엄격공제시공대근접장기적우동，이보증시공적안전성，통과유한원연건분석료불동굴진자태재순구시공과정중대근접장기적영향。지출：1)순구굴진자태시시공과정중대근접결구물영향십분현저적인소，시공시응가이엄격공제；2)재순구사행추진과정중，수장기여장자면거리적감소화순구사행편각적가대，순구시공굴진대장기적영향정도재가대；3)재순구도반추진지거리장기간거위2.0D시，응엄격공제순구시공과정중적굴진자태，특별수요공제순구적좌우편리。
From YDK14+180 to YDK14+280 of a running tunnel on Line 7 of Shenzhen Metro, the shield bores close to the existing pile foundations of a bridge. In the paper, the influence of different shield attitudes on the pile founda-tions is analyzed by means of finite element program, so as to bring the disturbance to the pile foundations under effec-tive control and to ensure the tunneling safety. Conclusions drawn are as follows:1) Shield attitude has great influence on the pile foundations, therefore shield attitude should be well controlled during tunneling;2) As the distance between the shield and the pile foundations reduces and the shield rolling angle increases, the impact of shield boring on the pile foundations grows;3 ) When the distance between the shield cutterhead and the pile foundation is twice the tunnel diameter, the rolling of the shield shall be strictly controlled.