The Analysis Of The Anomaly Of Seepage Of The Renzonghai Rock-fill Dam At The Initial Water

RenzongHai rockfill dam site overburden depth of 130m ~ 148m, withsuspended concrete foundation seepage cutoff all, the maximum wall depth of about82m, thick and 1.0m, the dam of composite geomembrane, the two sides abutmentreatment with anti-seepage curtain grouting rock. In view of the storage dam on theearly stages of the flow nomalies, take full advantage of the safety of dam seepagemonitoring data, spatial and temporal variation of dam seepage, combined withnumerical simulation, determine the area where the seepage anomalies, the followingconclusions:(1) The arrangement of the depth of the concrete cutoff wall, it was notcompletely down to bedrock, although the wall of the groundwater flow plays a largerrole in the effectiveness of isolation, but also evident around the wall of the reservoirwater to the downstream end of the phenomenon of infiltration , and the left bank ofthe right bank is more than obvious.(2) In the normal water level is 2930.00m, the dam is only within the flow rangeof activities in filling the bottom of the body to the downstream discharge. When thewater level reaches 2910.00m, a lot of water seepage through the left and right bankslower corridor, around the penetration hole excretion, mainly by the seepage cutoffwall around the bottom and behind the dam site to the discharge from the dam causedby the existence of the right bank to the left bank of the seepage supplies.(3) better left bank grouting curtain seepage of groundwater through the curtainafter a power cut a great potential, there is no obvious infiltration around the abutment.The right bank there are the more obvious seepage around the dam, the monitoringdata analysis the lower right bank grouting gallery, on the right bank around theseepage hole on the right bank of the seepage slope behind the dam is the reservoirwater cut-off wall and grout curtain around the right bank to the downstream endexcretion caused by one of the flow and seepage cutoff wall around the abnormalrange on the accounts for the main factors. (4) in three-dimensional numerical simulation, through the cut-off wall, rightbank of the grout curtain simulate conditions at different depths, combined withmonitoring findings and free surface simulation of head and flow chart showingtheSeepage cutoff wall around the bottom of the right bank, seepage curtain aroundthe seepage of rock-fill dam seepage anomalies play a fundamental role to play.