“五八围”地处我省东江三角洲顶部,全围沿东江岸有几个电排站和水闸,五八围电排站为其中主要闸站,装机四台,共520千瓦。 这个电排站于1965年建成,地基为粉细砂层。建成次年,东江大水,闸室两侧侧墙均在工作缝外张开0.1米,反滤层喷水喷砂,立即停止抽水,让围内积水位上升,险象才得缓和。同年冬,在明渠设减压井三个,直达砂层以下的砂卵石强透水层。67年汛期观察,反滤层排水孔排水、冒砂大为减轻。69年汛期,4号水泵基础沉陷,泵轴倾斜,无法开机。69年冬,在原干砌石护坦面上浇四条纯混凝土进水管,经70年及71年观察,效果较好。但是,由于进 “Five or eight Wai” is located in the top of the Dongjiang Delta in our province. There are several electric discharge stations and sluices along the east bank of the river. Five or eight perimeter electric discharge stations are one of the main sluice stations with a total installed capacity of 520 kilowatts. The power station was built in 1965, the foundation for the fine sand layer. The construction of the following year, the East River flood, sluice on both sides of the wall flaps are open in the work seam 0.1 meters, anti-filtration layer of sandblasting, immediately stop pumping, so that the water level around the circumference, the risk had to ease. In the same winter, three relief tunnels were set up in the open channel to reach the sand-pebble permeable layer below the sand layer. 67 years of flood observation, drainage layer drainage filter, greatly reduce the risk of sand. 69 flood season, No. 4 pump foundation subsidence, pump shaft tilt, unable to boot. In the winter of 1969, four pure concrete inlet pipes were poured on the original dry masonry retaining surface, which was observed after 70 and 71 years of operation and the effect was better. However, due to progress