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昌平区小城镇污水配套管网3标段工程穿越京密引水渠,为减少施工对渠道的影响,采用顶管施工。通过设计计算,确定顶管中心高程为44.43 m,顶进长度261.8 m,选用TP-1550型土压平衡顶管机,渠底土仓压力控制在0.04~0.08 MPa之间,顶后注入水泥浆加固,通过施工期及稳定期观测,施工区域内沉降数据均满足要求,为今后同类工程施工提供参考。
Changping District, a small town sewage supporting pipe network 3 section of the project through Jingmi diversion canal, in order to reduce the impact of the construction of the channel, the use of pipe jacking construction. Through the design and calculation, the center height of jacking pipe is 44.43m and the jacking length is 261.8m. The TP-1550 type earth pressure balance pipe jacking machine is selected. The pressure at the bottom of channel canal is controlled between 0.04 and 0.08 MPa. Through the observation of construction period and stable period, the settlement data in the construction area all meet the requirements, providing references for the construction of similar projects in the future.