双机抬吊放空火炬塔架及空中组对

川渝气区某天然气净化厂工程放空火炬塔架高、大、重，若采用传统的吊装工艺则工期长、成本高、风险大。为了经济、安全、快速地将放空火炬塔架吊装就位，通过对多种吊装方案的对比分析论证，最终确定采取“双机抬吊、单机溜尾”分段吊装、空中组对的吊装新工艺：主吊吊车选用1台300 t履带吊和1台260 t履带吊，溜尾吊车为1台65 t汽车吊，历时24 h一次性成功地将火炬塔架吊装就位。工程实践证明：该吊装工艺既确保了塔架的施工质量、降低了吊装风险，又极大地节约了吊装成本，缩短了吊装工期，对相关工程具有一定的借鉴意义。

Application of double crane lifting and air assembly technique in venting and flare stack tower

The venting and flare stack tower at the LG Natural Gas Treatment Plant is high, large and heavy. The application of traditional lifting techniques will result in longer construction period, higher costs and risks. To place the venting and flare stack tower in position in an economical, secure and speedy way, this paper analyzed several lifting schemes and made a comparison between them. Finally, the segment lifting process, so-called "double crane lifting and single crane tailing", and air assembly process were adopted. A 300-ton and a 260-ton crawler cranes were selected as the main hoisting cranes, whilst a 65-ton crane truck was selected as the tailing hoisting crane. The flare stack tower was successfully placed in position within 24 hours. The results show that the hoisting technique is capable of ensuring construction quality, reducing hoisting risks, greatly saving the lifting costs and reducing the project period. This technique has certain reference value to other relevant projects.