Dismounting method of box-type derrick

The embodiment of the invention provides a dismounting method of a box-type derrick. The dismounting method comprises the following steps of calculating the weight of each component contained in the box-type derrick; dividing the box-type derrick into a plurality of dismounting units according to the weight of each component, and marking the dismounting sequence of all the dismounting units; selecting an automobile crane according to the maximum weight of each dismounting unit and the height of the box-type derrick; and sequentially cutting the dismounting units according to the dismounting sequence, and hoisting the cut dismounting units to the ground through the automobile crane, so that safe and rapid dismounting of the box-type derrick is achieved. 本发明实施例提供了一种箱型井架的拆除方法，通过计算箱型井架包含的各个构件的重量；依据各个构件的重量将箱型井架划分为多个拆除单元,并标记各个拆除单元的拆除顺序；根据各个拆除单元的最大重量以及箱型井架的高度选择汽车起重机；按照拆除顺序依次对拆除单元进行切割，并利用汽车起重机将切割完成的拆除单元吊至地面，从而实现箱型井架的安全、快速拆除。