盾构区间下穿多类建筑物施工关键技术与保护控制应用

KEY CONSTRUCTION TECHNOLOGY AND PROTECTION CONTROL APPLICATION OF UNDERPASS STRUCTURE IN SHIELD SECTION

盾构施工容易造成房屋较大沉降、开裂、塌陷等一系列风险,广州市轨道交通22号线九分部一工区番祈中间风井至番祈2号盾构井区间下穿了多个建筑物,为了控制其在施工过程中的风险,按盾构掘进顺序分别分析了盾构下穿建不同筑物施工技术,并提出了一套盾构下穿建(构)筑物的保护措施。研究表明,地表沉降符合规范相关要求。

Shield construction is liable to cause a series of risks such as large settlement,cracking and collapse of buildings,in order to control the risk in the construction process,a number of buildings were drilled under the section from the middle air shaft of Fanqi to the shield shaft of Fanqi No.2,this paper analyzes the construction technology of shield machine under different buildings,and puts forward a set of protective measures for shield machine under buildings.The study shows that the surface settlement meets the relevant requirements of the code.