泰安东岳TA5101JQZGT831起重机具有以下优点：1. 高起重能力：该起重机的最大起重量达到了51吨，能够满足大多数中小型建筑工地的起重需求。2. 高度可调：起重机的塔身采用分段焊接设计，可以根据需要进行高度的调整，适用于不同高度的建筑工地。3. 稳定性好：起重机的整体结构设计合理，配备了稳定的支腿和固定装置，能够保持机身的稳定性，提高起重的安全性。4. 操控方便：起重机采用液压控制系统，操作简单方便，能够实现起重机的多种动作，如升降、转动等，提高工作效率。5. 耐用性强：起重机采用高强度材料制造，具有较强的抗风能力和耐久性，在恶劣天气条件下依然能够正常工作。6. 维护方便：起重机的维护保养非常简单，配备了易于检修的部件和结构，减少了维护工作的难度和时间。7. 安全性高：起重机配备了多种安全装置，如超重保护、失速保护、翻滚保护等，能够有效保护工人的安全。总体而言，泰安东岳TA5101JQZGT831起重机具有起重能力强、稳定性好、操控方便等优点，适用于各种建筑工地的起重作业。

Tai'an Dongyue TA5101JQZGT831 crane has the following advantages:1. High lifting capacity: the crane's maximum lifting capacity reaches 51 tons, which can meet the lifting needs of most small and medium-sized construction sites.2. Height adjustable: the crane's tower adopts a segmented welded design, which can be adjusted according to the need for height, and is suitable for different heights of construction sites.3. Good stability: The overall structure of the crane is well-designed, equipped with stable legs and fixtures, which can maintain the stability of the body and improve the safety of lifting. 4. easy to operate: the crane adopts a hydraulic control system, which is simple and convenient to operate, and it can realize a variety of crane movements, such as lifting and rotating, to improve the efficiency of the work. 5. strong durability: the crane is made of high-strength materials with strong wind resistance and durability, and can still work normally under bad weather conditions.6. Easy maintenance: the crane is very simple to maintain, equipped with easy-to-maintain components and structures, reducing the difficulty and time of maintenance work.7. High safety: the crane is equipped with a variety of safety devices, such as overweight protection, loss of speed protection, rollover protection and so on, which can effectively protect the safety of workers. Overall, Tai'an Dongyue TA5101JQZGT831 crane has the advantages of strong lifting capacity, good stability, easy to maneuver, etc. It is suitable for lifting operations in various construction sites.