土压平衡盾构近距离旁穿办公大楼施工技术

Construction Technology of Earth Pressure Balanced Shield Office Building at Short Range

为有效控制土压平衡盾构在富水砂砾地层侧穿建筑物的沉降量，采用FLAC软件建立二维模型，根据实际的地层参数，模拟计算盾构掘进引起的地面沉降量，结合盾构掘进可能引起的建筑物沉降风险进行综合分析，针对性的对建筑物进行预加固，通过盾构掘进参数的合理控制及合理有效的沉降监测，保证了建筑物的安全、实践证明，模拟数据及针对性的加固措施能够满足实际施工需要，可达到预期的效果，验证了加固方案的可行性。

In oMer to control the seulemen! of EPFI shield in water-rich sand and gravel stratum in the building side ef feetively, FLAC soflware is used to establish tile two-dimensional model. According to the actual fimnation parameters, the shield tunneling induced ground settlement with shield tunneling is simulated, the building settlement risk is analyzed, and lhe reinforcement of the buihting is done through the reasonable control of Ihe shield tunneling parameters anti settlement monitoring effectively, so as to ensure the safety of lhe buihling. Practice has proven that Ihe simulation data and the target- ed reinforeement measures can meet the actual eonstruction needs, and achieve the desired results. It can also verify the feasibility of the reinforeemenl program.