超近距双线隧道旁穿建筑群的信息化施工风险控制

发布时间：2018-12-14 03:10

【摘要】：为减轻双线盾构隧道旁穿引起的建筑物沉降,采用FLAC~(3D)对不同施工方案的双线隧道旁穿建筑物引起的地层沉降进行数值模拟,对实施的右线隧道变线+左线钢环内支撑+双线花管注浆加固方案的施工参数进行优化,并进行相关的工程实测分析。结果表明:原方案造成的建筑物差异沉降为26.5 mm,远超其10 mm的控制标准;采用排桩加固或右线变线后左线钢环内支撑和双线花管注浆加固方案均能使建筑物差异沉降满足要求;优化右线盾构参数可减轻对建筑物影响;施工荷载和注浆压力是后行右线影响先行左线受力状态的主要因素,采用实时监测的信息化施工是必要的。超近距离双线盾构顺利旁穿建筑物群,相关结果可为类似工程提供借鉴。
[Abstract]:In order to reduce the building settlement caused by the side penetration of the double-line shield tunnel, FLAC~ (3D) was used to simulate the ground settlement caused by the double-line tunnel passing through the building with different construction schemes. This paper optimizes the construction parameters of the right line tunnel with variable line and left line steel ring supporting double-line flower pipe grouting reinforcement scheme, and carries on the related engineering actual measurement analysis. The results show that the difference settlement caused by the original scheme is 26.5 mm, which far exceeds its control standard of 10 mm. The construction differential settlement can be satisfied by adopting the method of reinforcing with row piles or changing the right line after the left steel ring bracing and grouting with double-line flower pipe, and optimizing the parameters of right line shield can reduce the influence on the building. The construction load and grouting pressure are the main factors that influence the stress state of the first left line, so it is necessary to adopt the information construction with real time monitoring. The results can be used for reference in similar projects.
【作者单位】：三明学院建筑工程学院;北京工业职业技术学院;
【基金】：福建省自然科学基金资助项目(2016J01743) 三明学院自然科学基金暨福建省中青年教育科研资助项目(JAT160454,B201603)
【分类号】：U455.43

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