2016年10月上 施工技术 第45卷第19期 CONSTRUCTION TECHNOLOGY 99 D0I:10.7672/5j52016190099 地面敏感区域盾构施工控制技术研究 温法庆1，贾璐2，翁振华1，皮摩海2，柴庆水2 (1.中铁十八局集团有限公司，天津300222；2.南昌大学建筑工程学院，江西南昌330031) [摘要]南昌轨道交通1号线某区间盾构在上软（砂砾）下硬（泥岩）的富水地层中下穿位于八一广场上的国旗基 础，为保证旗杆的垂直度，需要严格控制旗杆基础的不均匀沉降量.在实际施工中，根据八一广场地质条件（泥岩 厚度)的不断变化及其特定敏感的地面环境，通过数值计算进行沉降预判，及时调整优化掘进参数，强化掘进参数 控制及加强施工管理，并通过地面预注浆及洞内及时二次注浆的辅助控制措施，盾构顺利穿越国旗基础，有效控制 了旗台的沉降，规避了因盾构施工对国旗造成的影响. [关键词]地铁；盾构；富水地层；沉降；施工技术 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2016)19-0099-06 Study of Shield Construction Control Technology in Sensitive Ground Environment Wen Faqing' Jia Lu2 Weng Zhenhua' Pi Yinghai' Chai Qingshui' (1.China Railcay 18 Bureau Group Co.Ltd.Tianjin 300222 China;2.School of Civil Engineering and Architecture Nanchang Unirersity Nanchang Jiangxi 330031 China Abstract:During the shield construction project from Bayi Square Station to Dinggong Road Station of Nanchang Metro Line 1 for the purpose of guaranteeing the perpendicularity of the national flagpole the differential settlement should be strictly controlled which could be caused by the construction between the upper-soft lower-hard water-rich sandy gravel stratum under the foundation of the national flag.Based on the geological conditions and the sensitive ground environment and settlement anticipation by numerical calculation the heading parameters are optimized and the construction management is reinforced.A series of measures including pre-injecting technique and second grouting-reinforcement are conducted which...
地面敏感区域盾构施工控制技术研究.pdf
