During the design of tower crane pile foundation in deep foundation pit, relevant personnel need to consider the influence of many factors, such as construction site, surrounding environment, plane shape of superstructure and basement, supporting form of foundation pit, etc., and according to the engineering situation, choose the tower crane design scheme scientifically and reasonably according to local conditions, so as to ensure the safety of tower crane's use, installation and removal, reduce the adverse effects caused by the stability of foundation pit supporting, and effectively improve the use efficiency of tower crane.
In addition to drilling and blasting with various drilling rigs, the expanded data are mainly used: excavation machinery, such as various single-bucket excavators (see figure) or multi-bucket excavators;
Scraper machinery, such as bulldozers, scrapers and loaders; Rail transport machinery, such as locomotive traction harvesters; Trackless transport machinery, such as dump trucks.
According to different situations, various cooperation methods are adopted to carry out various operations such as digging, loading, transporting and unloading. According to the project scale and construction conditions, choose the appropriate construction machinery and corresponding construction methods reasonably, and pay special attention to the cooperation of machinery and equipment to avoid weak links.
Under certain conditions, earthwork can be excavated by hydraulic excavation; There is also a method of blasting excavation, that is, throwing blasting or sublating blasting technology, which not only breaks the earthwork, but also abandons it completely or partially outside the design boundary.
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