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珠海对澳供水工程是珠海经济特区重点涉外建设项目,引输水线路长达14公里,所处地形、地质条件复杂,施工难度较大,其中控制整个工程工期的4号莲湾隧洞出口段附近,地下水补给十分丰富,围岩为花岗岩全风化带;自今年2月份以来,连续发生罕见大塌方,大量的稀泥及重达十多吨的孤石从掌子面涌入,堵塞坑道廿多米,局部地段冒顶。在掌子面顶部地面形成了一个深28米,直径达22米的大锥形漏斗。对澳门供水公司工程处的领导及时组织了担负此项工程技
Zhuhai O Water Supply Project is a key foreign-related construction project of Zhuhai Special Economic Zone. The water diversion route is 14 kilometers long. The topographic and geological conditions are complex and construction is difficult. Among them, the No. 4 Lianwan Tunnel exit near the project The groundwater supply is very rich. The surrounding rock is a granite weathering belt. Since February this year, a series of rare landslides have occurred. Large amounts of mud and over 10 tons of boulders influx from the face of the dug to cover more than 20 meters of tunnels. Local Lot roof. A 28-meter-deep, large-cone funnel with a diameter of 22 meters formed on the top of the face. The leadership of the engineering department of Macao Water Supply Company promptly organized the project