概况履带起重机是一种常用的建筑起重机。其优点是履带接地压力低,能在没有道路地区和松软地面上工作,工作时不用支腿,可以在一定条件下带负荷行走。近年来,各种汽车起重机发展很快,在部分场所有取代履带起重机的趋势;但在道路条件差、工期较长等条件下,履带起重机仍广泛使用,因而也有很大发展。有人认为,在同一工地作业时间超过一周以上时 Overview Crawler crane is a commonly used construction crane. The advantage is that the ground pressure of the crawler track is low, it can work in the areas without roads and on the soft ground, without legs when working, and can carry the load under certain conditions. In recent years, various types of truck cranes have been developed rapidly, and some of them have the tendency of replacing crawler cranes. However, under the conditions of poor road conditions and long construction period, crawler cranes are still widely used and have also been greatly developed. Some people think that when working in the same site for more than a week