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冯家山水库位于陕西省渭河支流千河出汕谷口处的风翔县境内。枢纽工程由均质土坝、右岸泄洪洞、左岸溢洪洞及灌溉输水隧洞等建筑物组成。最大坝高73米,总库容3.89亿立方米,灌溉126万亩。泄洪洞是利用导流洞改建而成,在导流洞封堵截流设计中,采用翻转木闸门堵口截流。实践证明,此项技术措施简易可行,费省效宏。冯家山水库大坝施工采用一次围堰,隧洞导流的方式。导流洞洞身段系灰色紫红色钙质板岩,夹有大理岩薄层,岩石坚硬,性脆,湿抗压强度一般为40～80 MPa,厚层
Feng Jiashan reservoir is located in Shaanxi Province, Weihe tributary of thousands of rivers out of Shantou Fengxiang County. The hub project consists of a homogeneous earth dam, a right bank spillway tunnel, a left bank spillway and an irrigation water conveyance tunnel. The dam height of 73 meters, the total storage capacity of 389000000 cubic meters, 1260000 acres of irrigation. Spillway tunnel is the use of diversion tunnel reconstruction made in the diversion tunnel closure closure design, the use of inverted wooden gate closure closure. Practice has proved that this technical measure is simple and feasible, save money and save macro. Feng Jiashan dam construction using a cofferdam, tunnel diversion way. Diversion tunnel section of the body is gray purplish red calcium slate, sandwiched with marble thin, rock hard, brittle, wet compressive strength is generally 40 ~ 80 MPa, thick layer