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铜街子工程自1986年10月河床截流后,目前已进入二期工程施工阶段。主体工程除部分护坦及筏闸下游航道外,基础开挖工作已基本结束。坝基约10万m固结灌浆中,C_5软弱夹层采用了高压喷射新工艺,其压力高达30MPa,除对软弱结构面进行冲洗外,还进行了高压固结灌浆。左岸接头坝是将碾压混凝土技术应用于主体工程的试验坝段,现已完成5万m~3碾压混凝土,达到464.0m高程(距坝顶尚有15m),并为此项新技术积累了设计与施工经验。厂房混凝土浇筑是控制发电工期的关键部位,正在加紧施工。施工栈桥桥面系统已经完
After the closure of the riverbed in October 1986, Tongjizi Subproject has now entered the construction phase of the second phase. In addition to part of the main project escort and raft gate downstream channel, the basic excavation work has basically ended. In the consolidation grouting with a thickness of about 100000 m, a new high-pressure jetting process was adopted for the soft interlayer of C_5. The pressure was up to 30 MPa. In addition to the flushing of the weak structure, high-pressure consolidation grouting was also carried out. The left bank joint dam is a test dam section where the RCC technology is applied to the main part of the project. Now 50000 m ~ 3 of RCC has been completed to an elevation of 464.0 m (15 m away from the crest), and for the accumulation of this new technology The design and construction experience. Concrete plant pouring is the key part of the control of power generation period, is stepping up construction. Trestle bridge construction system has been completed