{"id":6977,"date":"2018-01-21T04:53:43","date_gmt":"2018-01-20T20:53:43","guid":{"rendered":"https:\/\/www.envguide.com\/?p=6977"},"modified":"2018-03-16T00:01:51","modified_gmt":"2018-03-15T16:01:51","slug":"environmental-application-flexible-liner-underground-technology-flute","status":"publish","type":"post","link":"https:\/\/us.envguide.com\/environmental-application-flexible-liner-underground-technology-flute\/","title":{"rendered":"Environmental Application of Flexible Liner Underground Technology (FLUTe)"},"content":{"rendered":"
The most common application of FLUTe technologies would include the following:<\/p>\n Groundwater sampling\uff1a<\/strong><\/p>\n The water flows from the formation into the spacer, through the port, into the tube which lies on the inside surface of the liner. The water flows from the port via the tube, to the bottom of the hole, and then upward through a Teflon ball check valve into the “U” shaped tube. The water rises in both legs of the U tube. In the larger (1\/2″id) tube, the water level can be tagged from the surface. A gas pressure is applied to the large tube to drive the sample water through the second check valve to the surface. After purging the tubing, the sample water does not contact the drive gas. The large tube and pumping hardware are not everted into the borehole, but simply lowered as a tubing bundle following the liner to the bottom. Note that all the water in the borehole is isolated inside the liner.<\/p>\n The spacer, port, tubing and pump system shown are duplicated for each port. The liner is pressed against the borehole wall by the excess head in the liner above the local water table.<\/p>\n Pressure transducers are often attached to the sampling tubing just below the first check valve to measure the head in the formation at the port location. The transducer is upstream of the valves in the pumping system. The pressure transducer can be calibrated to the head measured in the sampling system with a tag line.<\/p>\n <\/p>\n \u975e\u6c34\u76f8\u6db2\u4f53\u8c03\u67e5\uff1a<\/strong><\/p>\n \u7528\u4e8eNAPL\u76f8\u8c03\u67e5\u7684FLUTe\u662f\u7528\u4e8e\u505a\u5e38\u89c4\u94bb\u5b54\u963b\u9694\u7684FLUTe\u886c\u5957\u6280\u672f\u7684\u6539\u8fdb\u7248\u3002\u8be5\u886c\u5957\u65e0\u5730\u4e0b\u6c34\u53d6\u6837\u529f\u80fd\uff0c\u4e5f\u672a\u88c5\u914d\u6709\u5438\u9644\u4ecb\u8d28\u7528\u6765\u6355\u96c6VOC\uff0c\u800c\u662f\u5728\u886c\u5957\u4e0e\u94bb\u5b54\u5b54\u58c1\u63a5\u89e6\u7684\u8868\u9762\u6d82\u6709\u4e00\u5c42\u80fd\u591f\u9ecf\u4f4fNAPL\u8ff9\u8c61\u7684\u8986\u5c42\u3002\u8be5\u7528\u4e8eNAPL\u76f8\u8c03\u67e5\u7684\u886c\u5957\uff0c\u53ef\u4ee5\u5916\u7ffb\u4e0b\u653e\u8fdb\u5165\u94bb\u5b54\uff0c\u5e76\u63a2\u6d4b\u5230NAPL\u76f8\u7684\u5b58\u5728\u4e0e\u6df1\u5ea6\u5206\u5e03\u3002\u8fd9\u9053\u8986\u5c42\u5177\u6709\u758f\u6c34\u7279\u6027\uff0c\u88c2\u9699\u6216\u662f\u5b54\u9699\u4e2d\u5b58\u5728\u7684\u4efb\u4f55\u975e\u6c34\u76f8\u6db2\u4f53\u4e00\u4f46\u4e0e\u886c\u5957\u8986\u5c42\u63a5\u89e6\uff0c\u7acb\u523b\u4f1a\u88ab\u5438\u4f4f\u3002\u886c\u5957\u5916\u8868\u9762\uff08\u5373\u4e0b\u653e\u5982\u94bb\u5b54\u4e2d\u7684\u886c\u5957\u5185\u4fa7\uff09\u4e0a\u67d3\u6709\u6761\u7eb9\uff0c\u4e0e\u56db\u6c2f\u4e59\u70ef\u6216\u4e09\u6c2f\u4e59\u70ef\u7b49\u8be5\u7c7b\u975e\u6c34\u76f8\u6db2\u4f53\u63a5\u89e6\uff0c\u6761\u7eb9\u5c31\u4f1a\u88ab\u6eb6\u89e3\uff0c\u4e4b\u540e\u67d3\u6599\u4f1a\u6c81\u5165\u8986\u5c42\u7684\u5185\u8868\u9762\u3002\u8986\u5c42\u6750\u6599\u662f\u767d\u8272\u7684\uff0c\u67d3\u6599\u8fdb\u5165\u5185\u8868\u9762\u540e\u4f1a\u4ea7\u751f\u975e\u5e38\u663e\u773c\u7684\u5370\u8ff9\u3002\u8fd9\u6837\u7684\u5370\u8ff9\u5c31\u662f\u8986\u5c42\u63a5\u89e6\u5230\u975e\u6c34\u76f8\u6db2\u4f53\u7684\u6307\u793a\u8ff9\u8c61\u3002\u5370\u8ff9\u7684\u5927\u5c0f\u548c\u4f4d\u7f6e\u4e5f\u80fd\u8bf4\u660e\u975e\u6c34\u76f8\u6db2\u4f53\u7684\u91cf\u53ca\u5176\u6765\u6e90\u6df1\u5ea6\u3002<\/p>\n
\nFLUTe methods include a wide variety of flexible liner designs to perform functions. FLUTe provide a continuous seal of a borehole or pipe, and prevent migration of formation fluids through the open hole. No sealing grouts or bentonite seals are needed. FLUTe also could carry many useful devices such as tubing, instruments, absorbers, reactive covers, etc.. into place in the borehole while maintaining a continuous seal of the borehole. Borehole transmissivity can be mapped out while displacing the borehole water. The liner also support the borehole wall against collapse. Flexible liner is able to propagate through tortuous passages of varying diameters inaccessible to rigid piping or push rods, towing geophysical sondes of many kinds along the interior of the borehole while supporting the borehole against collapse onto the sonde. FLUTe liner can be removed by inversion without the liner touching any other portion of the borehole wall. There are liners fabricated in many different diameters and materials for many applications.<\/em><\/p>\n