隔河岩电站进水口布置方案设计

隔河岩电站引水隧洞的进水口区域，上部是缝合线发育的红溪灰岩，含有ｇ１层间滑动面；下部是灰、页岩互层岩体，分布有多层剪切泥化带，地质条件复杂。为了使电站引水隧洞进水口的设计既安全可靠又节省投资，设计上通过优化布置，仅对４０６号剪切泥化带彩和钢筋混凝土置换，对ｇ１层面采用预应力锚索加固，不仅确保了典型顺向坡的稳定安全，还减少了边坡处理的施工难度，加快了施工进度，节约了工程量。对其它类似工程的设计具有借

Layout of intake for Geheyan power station

in the intake region of the diversion tunel of the Geheyan Power Station, the upper rock is Hongxi lime limestone with developed joint lines and G1-type interlayer slip planes, and the lower rock is limestone-shale interstratified rockmass with sevelal shear argillaceous zones. The geological condition in the region is complicated. In older that the intake ofthe diversion tunnel of the power station was designed to be safe, reliable and econondcal, the layout of the intake was ophndzed in design, reinforced concrete was used to take the place of material in No. 406 shear algillaceous zone and prestressed anchors cables were used to strengthen G1-type interlayer slip planes. This alternative not only guaranteed the stability of the typical consequent slopes but also decreased difficulties in treallnent of side slopes, speeded up the progress ofconstrUction and decreased engineering quantity.