CAJ | 학술논문

枕头坝一级水电站二期围堰合龙闭气后即时完成了基坑排水,以确保后续施工在干地进行。为使基坑排水(初期排水)和后期经常性排水顺利进行,对所排水量进行了精确测算,据此选定了水泵型号及水泵台数。在排水过程中,由于基坑内水位不断下降,为使水泵适应大幅度水位变化的要求,选择了浮箱式水泵实施初期排水。详细论述了初期排水和经常性排水系统的布置要求,以及实施排水过程中应注意的问题。排水系统迄今已运行2 a,顺利通过了两个汛期的考验。实践证明,该排水系统布置合理,运行可靠。
침두패일급수전참이기위언합룡폐기후즉시완성료기갱배수,이학보후속시공재간지진행。위사기갱배수(초기배수)화후기경상성배수순리진행,대소배수량진행료정학측산,거차선정료수빙형호급수빙태수。재배수과정중,유우기갱내수위불단하강,위사수빙괄응대폭도수위변화적요구,선택료부상식수빙실시초기배수。상세논술료초기배수화경상성배수계통적포치요구,이급실시배수과정중응주의적문제。배수계통흘금이운행2 a,순리통과료량개신기적고험。실천증명,해배수계통포치합리,운행가고。
Foundation pit drainage of Zhentouba I Hydropower Station was carried out in dry land constriction after the second stage cofferdam was closed. The pump type and numbers were definitely determined according to calculation of drainage volume, so as to ensure the smooth implement of initial drainage and regular drainage in later period. For adapting to the large water level variation in the foundation pit during drainage period, floating-box pump was adopted for initial drainage. The layouts of drain-age system in initial drainage stage and regular drainage stage were presented, and the attention points were pointed out. The drainage system has operated for 2 years and gone through 2 flood seasons smoothly, which verifies the rationality and reliability of the drainage design.